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PATCH: Graphincal explain integrated in sql editor
10+ messages / 3 participants
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* PATCH: Graphincal explain integrated in sql editor
@ 2016-04-21 15:08 Sanket Mehta <[email protected]>
  2016-04-25 09:36 ` Re: PATCH: Graphincal explain integrated in sql editor Sanket Mehta <[email protected]>
  0 siblings, 1 reply; 10+ messages in thread

From: Sanket Mehta @ 2016-04-21 15:08 UTC (permalink / raw)
  To: pgadmin-hackers

Hi Team,

PFA the first patch for graphical explain integrated in sql editor.

Below are the few things which are different from previous patch which was
sent for stand alone graphical explain.

 -  Now user can select Explain/Explain Analyze with four optional
properties (Verbose, costs, timing and buffers)

 - Initially graph will be scale (according to only its width not height)
to fit to screen so no blank space will be there in case of very large
graph.

- Along with zoom in/out button, "zoom to original" button is also
provided, by clicking on which graph will be scale to its original size
(not same as initial one which is according to screen size).

Please do review this patch and let me know in case you have any comments.


Regards,
Sanket Mehta
Sr Software engineer
Enterprisedb


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Attachments:

  [text/x-patch] integrated_graphical_explainV1.patch (661.5K, 3-integrated_graphical_explainV1.patch)
  download | inline diff:
diff --git a/libraries.txt b/libraries.txt
index cd01c24..c337881 100644
--- a/libraries.txt
+++ b/libraries.txt
@@ -10,14 +10,13 @@ Modernizr           2.6.2       MIT/BSD      http://modernizr.com/
 AlertifyJS          1.1.0       MIT          http://alertifyjs.com/
 CodeMirror          4.12        MIT          http://codemirror.net/
 aciTree             4.5.0-rc.7  MIT/GPL      http://acoderinsights.ro/en/aciTree-tree-view-with-jQuery
-contextMenu         2.1.0       MIT          https://github.com/swisnl/jQuery-contextMenu
 wcDocker            0f5690318c  MIT/GPL      https://github.com/WebCabin/wcDocker
 Require.js          2.1.18      BSD/MIT      http://requirejs.org/
 Underscore.js       1.8.3       MIT          http://underscorejs.org/
 Underscore.string   387ab72d49  MIT          http://epeli.github.io/underscore.string/
 Backform.js         5859b4f9db  MIT          https://github.com/AmiliaApp/backform
 Backbone            1.1.2       MIT          http://backbonejs.org
-font-Awesome        4.5         SIL OFL      http://fortawesome.github.io/Font-Awesome/
+font-Awesome        4.3         SIL OFL      http://fortawesome.github.io/Font-Awesome/
 font-mfizz          1.2         MIT          http://fizzed.com/oss/font-mfizz
 backgrid.js         0.3.5       MIT          http://backgridjs.com/
 backbone.undo       0.2         MIT          http://backbone.undojs.com/
@@ -27,3 +26,4 @@ backgrid-filter     01b2b21     MIT          https://github.com/wyuenho/backgrid
 backbone.paginator  2.0.3       MIT          http://github.com/backbone-paginator/backbone.paginator
 backgrid-paginator  03632df     MIT          https://github.com/wyuenho/backgrid-paginator
 backgrid-select-all 1a00053     MIT          https://github.com/wyuenho/backgrid-select-all
+Snap.svg	    0.4.1	APACHE	     http://snapsvg.io/
diff --git a/web/pgadmin/misc/__init__.py b/web/pgadmin/misc/__init__.py
index f461cbe..e2c10aa 100644
--- a/web/pgadmin/misc/__init__.py
+++ b/web/pgadmin/misc/__init__.py
@@ -9,21 +9,45 @@
 
 """A blueprint module providing utility functions for the application."""
 
-import datetime
-from flask import session, current_app
+from flask import url_for, render_template
 from pgadmin.utils import PgAdminModule
 import pgadmin.utils.driver as driver
+import config
 
 MODULE_NAME = 'misc'
 
+class MiscModule(PgAdminModule):
+
+    def get_own_javascripts(self):
+        scripts = [{
+                'name': 'pgadmin.misc.explain',
+                'path': url_for('misc.index') + 'explain/explain',
+                'preloaded': False
+                },{
+                'name': 'snap.svg',
+                'path': url_for(
+                    'misc.static', filename='explain/js/' + (
+                        'snap.svg' if  config.DEBUG else 'snap.svg-min'
+                        )),
+                'preloaded': False
+                 }]
+        return scripts
+
+    def get_own_stylesheets(self):
+        stylesheets = []
+        stylesheets.append(url_for('misc.static', filename='explain/css/explain.css'))
+        return stylesheets
+
 # Initialise the module
-blueprint = PgAdminModule(MODULE_NAME, __name__,
-                          url_prefix='')
+blueprint = MiscModule(MODULE_NAME, __name__, static_url_path="/static")
 
 ##########################################################################
 # A special URL used to "ping" the server
 ##########################################################################
 
[email protected]("/")
+def index():
+    return ''
 
 @blueprint.route("/ping", methods=('get', 'post'))
 def ping():
@@ -31,3 +55,16 @@ def ping():
     driver.ping()
 
     return "PING"
+
+# TODO:: This is a demo url, remove it later.
[email protected]("/explain")
+def demo():
+    return render_template('demo_explain.html')
+
[email protected]("/explain/explain.js")
+def explain_js():
+    return render_template("explain/js/explain.js")
+
[email protected]("/sample")
+def sample():
+    return render_template('sample.html')
diff --git a/web/pgadmin/misc/static/explain/img/ex_aggregate.png b/web/pgadmin/misc/static/explain/img/ex_aggregate.png
new file mode 100644
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diff --git a/web/pgadmin/misc/static/explain/img/ex_aggregate.svg b/web/pgadmin/misc/static/explain/img/ex_aggregate.svg
new file mode 100644
index 0000000..198bf04
--- /dev/null
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+  </metadata>
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new file mode 100644
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+   xmlns:xlink="http://www.w3.org/1999/xlink"
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new file mode 100644
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new file mode 100644
index 0000000..0d248e2
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new file mode 100644
index 0000000..4c9332a
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GIT binary patch
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literal 0
HcmV?d00001

diff --git a/web/pgadmin/misc/static/explain/img/extension-sm.svg b/web/pgadmin/misc/static/explain/img/extension-sm.svg
new file mode 100644
index 0000000..3871e60
--- /dev/null
+++ b/web/pgadmin/misc/static/explain/img/extension-sm.svg
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   version="1.1"
+   width="16"
+   height="16"
+   id="svg2">
+  <metadata
+     id="metadata8">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs6" />
+  <image
+     xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABHNCSVQICAgIfAhkiAAAAU5JREFU
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+SUVORK5CYII=
+"
+     x="0"
+     y="0"
+     width="16"
+     height="16"
+     id="image10" />
+</svg>
diff --git a/web/pgadmin/misc/static/explain/img/extension.png b/web/pgadmin/misc/static/explain/img/extension.png
new file mode 100644
index 0000000000000000000000000000000000000000..e3c533347883fc1dec73bcb21b32fc54e3c31732
GIT binary patch
literal 996
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literal 0
HcmV?d00001

diff --git a/web/pgadmin/misc/static/explain/img/extension.svg b/web/pgadmin/misc/static/explain/img/extension.svg
new file mode 100644
index 0000000..6ab57bf
--- /dev/null
+++ b/web/pgadmin/misc/static/explain/img/extension.svg
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   version="1.1"
+   width="16"
+   height="16"
+   id="svg2">
+  <metadata
+     id="metadata8">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs6" />
+  <image
+     xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABHNCSVQICAgIfAhkiAAAAPJJREFU
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+"
+     x="0"
+     y="0"
+     width="16"
+     height="16"
+     id="image10" />
+</svg>
diff --git a/web/pgadmin/misc/static/explain/img/extensions.png b/web/pgadmin/misc/static/explain/img/extensions.png
new file mode 100644
index 0000000000000000000000000000000000000000..eed7ca97a33ef595f448b8621168d531f86d51d5
GIT binary patch
literal 1017
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literal 0
HcmV?d00001

diff --git a/web/pgadmin/misc/static/explain/img/extensions.svg b/web/pgadmin/misc/static/explain/img/extensions.svg
new file mode 100644
index 0000000..22a8206
--- /dev/null
+++ b/web/pgadmin/misc/static/explain/img/extensions.svg
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   version="1.1"
+   width="16"
+   height="16"
+   id="svg2">
+  <metadata
+     id="metadata8">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs6" />
+  <image
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diff --git a/web/pgadmin/misc/static/explain/img/exttable-sm.png b/web/pgadmin/misc/static/explain/img/exttable-sm.png
new file mode 100644
index 0000000000000000000000000000000000000000..acd43cb8abab6ef38daf34ff6d7544153a11dacf
GIT binary patch
literal 612
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literal 0
HcmV?d00001

diff --git a/web/pgadmin/misc/static/explain/img/exttable-sm.svg b/web/pgadmin/misc/static/explain/img/exttable-sm.svg
new file mode 100644
index 0000000..e1763ad
--- /dev/null
+++ b/web/pgadmin/misc/static/explain/img/exttable-sm.svg
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   version="1.1"
+   width="16"
+   height="16"
+   id="svg2">
+  <metadata
+     id="metadata8">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs6" />
+  <image
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+</svg>
diff --git a/web/pgadmin/misc/static/explain/img/exttable.png b/web/pgadmin/misc/static/explain/img/exttable.png
new file mode 100644
index 0000000000000000000000000000000000000000..5d84035feea62d53d457481178b1bcbe9622f856
GIT binary patch
literal 793
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this()},a.filter.brightness=function(b){return null==b&&(b=1),a.format('<feComponentTransfer><feFuncR type="linear" slope="{amount}"/><feFuncG type="linear" slope="{amount}"/><feFuncB type="linear" slope="{amount}"/></feComponentTransfer>',{amount:b})},a.filter.brightness.toString=function(){return this()},a.filter.contrast=function(b){return null==b&&(b=1),a.format('<feComponentTransfer><feFuncR type="linear" slope="{amount}" intercept="{amount2}"/><feFuncG type="linear" slope="{amount}" intercept="{amount2}"/><feFuncB type="linear" slope="{amount}" intercept="{amount2}"/></feComponentTransfer>',{amount:b,amount2:.5-b/2})},a.filter.contrast.toString=function(){return this()}}),d.plugin(function(a,b){var c=a._.box,d=a.is,e=/^[^a-z]*([tbmlrc])/i,f=function(){return"T"+this.dx+","+this.dy};b.prototype.getAlign=function(a,b){null==b&&d(a,"string")&&(b=a,a=null),a=a||this.paper;var g=a.getBBox?a.getBBox():c(a),h=this.getBBox(),i={};switch(b=b&&b.match(e),b=b?b[1].toLowerCase():"c"){case"t":i.dx=0,i.dy=g.y-h.y;break;case"b":i.dx=0,i.dy=g.y2-h.y2;break;case"m":i.dx=0,i.dy=g.cy-h.cy;break;case"l":i.dx=g.x-h.x,i.dy=0;break;case"r":i.dx=g.x2-h.x2,i.dy=0;break;default:i.dx=g.cx-h.cx,i.dy=0}return i.toString=f,i},b.prototype.align=function(a,b){return this.transform("..."+this.getAlign(a,b))}}),d});
diff --git a/web/pgadmin/misc/static/explain/js/snap.svg.js b/web/pgadmin/misc/static/explain/js/snap.svg.js
new file mode 100644
index 0000000..ef0fb6d
--- /dev/null
+++ b/web/pgadmin/misc/static/explain/js/snap.svg.js
@@ -0,0 +1,8149 @@
+// Snap.svg 0.4.1
+// Copyright (c) 2013 – 2015 Adobe Systems Incorporated. All rights reserved.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// build: 2015-04-13
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// ┌────────────────────────────────────────────────────────────┐ \\
+// │ Eve 0.4.2 - JavaScript Events Library                      │ \\
+// ├────────────────────────────────────────────────────────────┤ \\
+// │ Author Dmitry Baranovskiy (http://dmitry.baranovskiy.com/) │ \\
+// └────────────────────────────────────────────────────────────┘ \\
+(function (glob) {
+    var version = "0.4.2",
+        has = "hasOwnProperty",
+        separator = /[\.\/]/,
+        comaseparator = /\s*,\s*/,
+        wildcard = "*",
+        fun = function () {},
+        numsort = function (a, b) {
+            return a - b;
+        },
+        current_event,
+        stop,
+        events = {n: {}},
+        firstDefined = function () {
+            for (var i = 0, ii = this.length; i < ii; i++) {
+                if (typeof this[i] != "undefined") {
+                    return this[i];
+                }
+            }
+        },
+        lastDefined = function () {
+            var i = this.length;
+            while (--i) {
+                if (typeof this[i] != "undefined") {
+                    return this[i];
+                }
+            }
+        },
+    /*\
+     * eve
+     [ method ]
+     * Fires event with given `name`, given scope and other parameters.
+     > Arguments
+     - name (string) name of the *event*, dot (`.`) or slash (`/`) separated
+     - scope (object) context for the event handlers
+     - varargs (...) the rest of arguments will be sent to event handlers
+     = (object) array of returned values from the listeners. Array has two methods `.firstDefined()` and `.lastDefined()` to get first or last not `undefined` value.
+    \*/
+        eve = function (name, scope) {
+            name = String(name);
+            var e = events,
+                oldstop = stop,
+                args = Array.prototype.slice.call(arguments, 2),
+                listeners = eve.listeners(name),
+                z = 0,
+                f = false,
+                l,
+                indexed = [],
+                queue = {},
+                out = [],
+                ce = current_event,
+                errors = [];
+            out.firstDefined = firstDefined;
+            out.lastDefined = lastDefined;
+            current_event = name;
+            stop = 0;
+            for (var i = 0, ii = listeners.length; i < ii; i++) if ("zIndex" in listeners[i]) {
+                indexed.push(listeners[i].zIndex);
+                if (listeners[i].zIndex < 0) {
+                    queue[listeners[i].zIndex] = listeners[i];
+                }
+            }
+            indexed.sort(numsort);
+            while (indexed[z] < 0) {
+                l = queue[indexed[z++]];
+                out.push(l.apply(scope, args));
+                if (stop) {
+                    stop = oldstop;
+                    return out;
+                }
+            }
+            for (i = 0; i < ii; i++) {
+                l = listeners[i];
+                if ("zIndex" in l) {
+                    if (l.zIndex == indexed[z]) {
+                        out.push(l.apply(scope, args));
+                        if (stop) {
+                            break;
+                        }
+                        do {
+                            z++;
+                            l = queue[indexed[z]];
+                            l && out.push(l.apply(scope, args));
+                            if (stop) {
+                                break;
+                            }
+                        } while (l)
+                    } else {
+                        queue[l.zIndex] = l;
+                    }
+                } else {
+                    out.push(l.apply(scope, args));
+                    if (stop) {
+                        break;
+                    }
+                }
+            }
+            stop = oldstop;
+            current_event = ce;
+            return out;
+        };
+        // Undocumented. Debug only.
+        eve._events = events;
+    /*\
+     * eve.listeners
+     [ method ]
+     * Internal method which gives you array of all event handlers that will be triggered by the given `name`.
+     > Arguments
+     - name (string) name of the event, dot (`.`) or slash (`/`) separated
+     = (array) array of event handlers
+    \*/
+    eve.listeners = function (name) {
+        var names = name.split(separator),
+            e = events,
+            item,
+            items,
+            k,
+            i,
+            ii,
+            j,
+            jj,
+            nes,
+            es = [e],
+            out = [];
+        for (i = 0, ii = names.length; i < ii; i++) {
+            nes = [];
+            for (j = 0, jj = es.length; j < jj; j++) {
+                e = es[j].n;
+                items = [e[names[i]], e[wildcard]];
+                k = 2;
+                while (k--) {
+                    item = items[k];
+                    if (item) {
+                        nes.push(item);
+                        out = out.concat(item.f || []);
+                    }
+                }
+            }
+            es = nes;
+        }
+        return out;
+    };
+    /*\
+     * eve.on
+     [ method ]
+     **
+     * Binds given event handler with a given name. You can use wildcards “`*`” for the names:
+     | eve.on("*.under.*", f);
+     | eve("mouse.under.floor"); // triggers f
+     * Use @eve to trigger the listener.
+     **
+     > Arguments
+     **
+     - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards
+     - f (function) event handler function
+     **
+     = (function) returned function accepts a single numeric parameter that represents z-index of the handler. It is an optional feature and only used when you need to ensure that some subset of handlers will be invoked in a given order, despite of the order of assignment.
+     > Example:
+     | eve.on("mouse", eatIt)(2);
+     | eve.on("mouse", scream);
+     | eve.on("mouse", catchIt)(1);
+     * This will ensure that `catchIt` function will be called before `eatIt`.
+     *
+     * If you want to put your handler before non-indexed handlers, specify a negative value.
+     * Note: I assume most of the time you don’t need to worry about z-index, but it’s nice to have this feature “just in case”.
+    \*/
+    eve.on = function (name, f) {
+        name = String(name);
+        if (typeof f != "function") {
+            return function () {};
+        }
+        var names = name.split(comaseparator);
+        for (var i = 0, ii = names.length; i < ii; i++) {
+            (function (name) {
+                var names = name.split(separator),
+                    e = events,
+                    exist;
+                for (var i = 0, ii = names.length; i < ii; i++) {
+                    e = e.n;
+                    e = e.hasOwnProperty(names[i]) && e[names[i]] || (e[names[i]] = {n: {}});
+                }
+                e.f = e.f || [];
+                for (i = 0, ii = e.f.length; i < ii; i++) if (e.f[i] == f) {
+                    exist = true;
+                    break;
+                }
+                !exist && e.f.push(f);
+            }(names[i]));
+        }
+        return function (zIndex) {
+            if (+zIndex == +zIndex) {
+                f.zIndex = +zIndex;
+            }
+        };
+    };
+    /*\
+     * eve.f
+     [ method ]
+     **
+     * Returns function that will fire given event with optional arguments.
+     * Arguments that will be passed to the result function will be also
+     * concated to the list of final arguments.
+     | el.onclick = eve.f("click", 1, 2);
+     | eve.on("click", function (a, b, c) {
+     |     console.log(a, b, c); // 1, 2, [event object]
+     | });
+     > Arguments
+     - event (string) event name
+     - varargs (…) and any other arguments
+     = (function) possible event handler function
+    \*/
+    eve.f = function (event) {
+        var attrs = [].slice.call(arguments, 1);
+        return function () {
+            eve.apply(null, [event, null].concat(attrs).concat([].slice.call(arguments, 0)));
+        };
+    };
+    /*\
+     * eve.stop
+     [ method ]
+     **
+     * Is used inside an event handler to stop the event, preventing any subsequent listeners from firing.
+    \*/
+    eve.stop = function () {
+        stop = 1;
+    };
+    /*\
+     * eve.nt
+     [ method ]
+     **
+     * Could be used inside event handler to figure out actual name of the event.
+     **
+     > Arguments
+     **
+     - subname (string) #optional subname of the event
+     **
+     = (string) name of the event, if `subname` is not specified
+     * or
+     = (boolean) `true`, if current event’s name contains `subname`
+    \*/
+    eve.nt = function (subname) {
+        if (subname) {
+            return new RegExp("(?:\\.|\\/|^)" + subname + "(?:\\.|\\/|$)").test(current_event);
+        }
+        return current_event;
+    };
+    /*\
+     * eve.nts
+     [ method ]
+     **
+     * Could be used inside event handler to figure out actual name of the event.
+     **
+     **
+     = (array) names of the event
+    \*/
+    eve.nts = function () {
+        return current_event.split(separator);
+    };
+    /*\
+     * eve.off
+     [ method ]
+     **
+     * Removes given function from the list of event listeners assigned to given name.
+     * If no arguments specified all the events will be cleared.
+     **
+     > Arguments
+     **
+     - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards
+     - f (function) event handler function
+    \*/
+    /*\
+     * eve.unbind
+     [ method ]
+     **
+     * See @eve.off
+    \*/
+    eve.off = eve.unbind = function (name, f) {
+        if (!name) {
+            eve._events = events = {n: {}};
+            return;
+        }
+        var names = name.split(comaseparator);
+        if (names.length > 1) {
+            for (var i = 0, ii = names.length; i < ii; i++) {
+                eve.off(names[i], f);
+            }
+            return;
+        }
+        names = name.split(separator);
+        var e,
+            key,
+            splice,
+            i, ii, j, jj,
+            cur = [events];
+        for (i = 0, ii = names.length; i < ii; i++) {
+            for (j = 0; j < cur.length; j += splice.length - 2) {
+                splice = [j, 1];
+                e = cur[j].n;
+                if (names[i] != wildcard) {
+                    if (e[names[i]]) {
+                        splice.push(e[names[i]]);
+                    }
+                } else {
+                    for (key in e) if (e[has](key)) {
+                        splice.push(e[key]);
+                    }
+                }
+                cur.splice.apply(cur, splice);
+            }
+        }
+        for (i = 0, ii = cur.length; i < ii; i++) {
+            e = cur[i];
+            while (e.n) {
+                if (f) {
+                    if (e.f) {
+                        for (j = 0, jj = e.f.length; j < jj; j++) if (e.f[j] == f) {
+                            e.f.splice(j, 1);
+                            break;
+                        }
+                        !e.f.length && delete e.f;
+                    }
+                    for (key in e.n) if (e.n[has](key) && e.n[key].f) {
+                        var funcs = e.n[key].f;
+                        for (j = 0, jj = funcs.length; j < jj; j++) if (funcs[j] == f) {
+                            funcs.splice(j, 1);
+                            break;
+                        }
+                        !funcs.length && delete e.n[key].f;
+                    }
+                } else {
+                    delete e.f;
+                    for (key in e.n) if (e.n[has](key) && e.n[key].f) {
+                        delete e.n[key].f;
+                    }
+                }
+                e = e.n;
+            }
+        }
+    };
+    /*\
+     * eve.once
+     [ method ]
+     **
+     * Binds given event handler with a given name to only run once then unbind itself.
+     | eve.once("login", f);
+     | eve("login"); // triggers f
+     | eve("login"); // no listeners
+     * Use @eve to trigger the listener.
+     **
+     > Arguments
+     **
+     - name (string) name of the event, dot (`.`) or slash (`/`) separated, with optional wildcards
+     - f (function) event handler function
+     **
+     = (function) same return function as @eve.on
+    \*/
+    eve.once = function (name, f) {
+        var f2 = function () {
+            eve.unbind(name, f2);
+            return f.apply(this, arguments);
+        };
+        return eve.on(name, f2);
+    };
+    /*\
+     * eve.version
+     [ property (string) ]
+     **
+     * Current version of the library.
+    \*/
+    eve.version = version;
+    eve.toString = function () {
+        return "You are running Eve " + version;
+    };
+    (typeof module != "undefined" && module.exports) ? (module.exports = eve) : (typeof define === "function" && define.amd ? (define("eve", [], function() { return eve; })) : (glob.eve = eve));
+})(this);
+
+(function (glob, factory) {
+    // AMD support
+    if (typeof define == "function" && define.amd) {
+        // Define as an anonymous module
+        define(["eve"], function (eve) {
+            return factory(glob, eve);
+        });
+    } else if (typeof exports != 'undefined') {
+        // Next for Node.js or CommonJS
+        var eve = require('eve');
+        module.exports = factory(glob, eve);
+    } else {
+        // Browser globals (glob is window)
+        // Snap adds itself to window
+        factory(glob, glob.eve);
+    }
+}(window || this, function (window, eve) {
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+var mina = (function (eve) {
+    var animations = {},
+    requestAnimFrame = window.requestAnimationFrame       ||
+                       window.webkitRequestAnimationFrame ||
+                       window.mozRequestAnimationFrame    ||
+                       window.oRequestAnimationFrame      ||
+                       window.msRequestAnimationFrame     ||
+                       function (callback) {
+                           setTimeout(callback, 16);
+                       },
+    isArray = Array.isArray || function (a) {
+        return a instanceof Array ||
+            Object.prototype.toString.call(a) == "[object Array]";
+    },
+    idgen = 0,
+    idprefix = "M" + (+new Date).toString(36),
+    ID = function () {
+        return idprefix + (idgen++).toString(36);
+    },
+    diff = function (a, b, A, B) {
+        if (isArray(a)) {
+            res = [];
+            for (var i = 0, ii = a.length; i < ii; i++) {
+                res[i] = diff(a[i], b, A[i], B);
+            }
+            return res;
+        }
+        var dif = (A - a) / (B - b);
+        return function (bb) {
+            return a + dif * (bb - b);
+        };
+    },
+    timer = Date.now || function () {
+        return +new Date;
+    },
+    sta = function (val) {
+        var a = this;
+        if (val == null) {
+            return a.s;
+        }
+        var ds = a.s - val;
+        a.b += a.dur * ds;
+        a.B += a.dur * ds;
+        a.s = val;
+    },
+    speed = function (val) {
+        var a = this;
+        if (val == null) {
+            return a.spd;
+        }
+        a.spd = val;
+    },
+    duration = function (val) {
+        var a = this;
+        if (val == null) {
+            return a.dur;
+        }
+        a.s = a.s * val / a.dur;
+        a.dur = val;
+    },
+    stopit = function () {
+        var a = this;
+        delete animations[a.id];
+        a.update();
+        eve("mina.stop." + a.id, a);
+    },
+    pause = function () {
+        var a = this;
+        if (a.pdif) {
+            return;
+        }
+        delete animations[a.id];
+        a.update();
+        a.pdif = a.get() - a.b;
+    },
+    resume = function () {
+        var a = this;
+        if (!a.pdif) {
+            return;
+        }
+        a.b = a.get() - a.pdif;
+        delete a.pdif;
+        animations[a.id] = a;
+    },
+    update = function () {
+        var a = this,
+            res;
+        if (isArray(a.start)) {
+            res = [];
+            for (var j = 0, jj = a.start.length; j < jj; j++) {
+                res[j] = +a.start[j] +
+                    (a.end[j] - a.start[j]) * a.easing(a.s);
+            }
+        } else {
+            res = +a.start + (a.end - a.start) * a.easing(a.s);
+        }
+        a.set(res);
+    },
+    frame = function () {
+        var len = 0;
+        for (var i in animations) if (animations.hasOwnProperty(i)) {
+            var a = animations[i],
+                b = a.get(),
+                res;
+            len++;
+            a.s = (b - a.b) / (a.dur / a.spd);
+            if (a.s >= 1) {
+                delete animations[i];
+                a.s = 1;
+                len--;
+                (function (a) {
+                    setTimeout(function () {
+                        eve("mina.finish." + a.id, a);
+                    });
+                }(a));
+            }
+            a.update();
+        }
+        len && requestAnimFrame(frame);
+    },
+    /*\
+     * mina
+     [ method ]
+     **
+     * Generic animation of numbers
+     **
+     - a (number) start _slave_ number
+     - A (number) end _slave_ number
+     - b (number) start _master_ number (start time in general case)
+     - B (number) end _master_ number (end time in gereal case)
+     - get (function) getter of _master_ number (see @mina.time)
+     - set (function) setter of _slave_ number
+     - easing (function) #optional easing function, default is @mina.linear
+     = (object) animation descriptor
+     o {
+     o         id (string) animation id,
+     o         start (number) start _slave_ number,
+     o         end (number) end _slave_ number,
+     o         b (number) start _master_ number,
+     o         s (number) animation status (0..1),
+     o         dur (number) animation duration,
+     o         spd (number) animation speed,
+     o         get (function) getter of _master_ number (see @mina.time),
+     o         set (function) setter of _slave_ number,
+     o         easing (function) easing function, default is @mina.linear,
+     o         status (function) status getter/setter,
+     o         speed (function) speed getter/setter,
+     o         duration (function) duration getter/setter,
+     o         stop (function) animation stopper
+     o         pause (function) pauses the animation
+     o         resume (function) resumes the animation
+     o         update (function) calles setter with the right value of the animation
+     o }
+    \*/
+    mina = function (a, A, b, B, get, set, easing) {
+        var anim = {
+            id: ID(),
+            start: a,
+            end: A,
+            b: b,
+            s: 0,
+            dur: B - b,
+            spd: 1,
+            get: get,
+            set: set,
+            easing: easing || mina.linear,
+            status: sta,
+            speed: speed,
+            duration: duration,
+            stop: stopit,
+            pause: pause,
+            resume: resume,
+            update: update
+        };
+        animations[anim.id] = anim;
+        var len = 0, i;
+        for (i in animations) if (animations.hasOwnProperty(i)) {
+            len++;
+            if (len == 2) {
+                break;
+            }
+        }
+        len == 1 && requestAnimFrame(frame);
+        return anim;
+    };
+    /*\
+     * mina.time
+     [ method ]
+     **
+     * Returns the current time. Equivalent to:
+     | function () {
+     |     return (new Date).getTime();
+     | }
+    \*/
+    mina.time = timer;
+    /*\
+     * mina.getById
+     [ method ]
+     **
+     * Returns an animation by its id
+     - id (string) animation's id
+     = (object) See @mina
+    \*/
+    mina.getById = function (id) {
+        return animations[id] || null;
+    };
+
+    /*\
+     * mina.linear
+     [ method ]
+     **
+     * Default linear easing
+     - n (number) input 0..1
+     = (number) output 0..1
+    \*/
+    mina.linear = function (n) {
+        return n;
+    };
+    /*\
+     * mina.easeout
+     [ method ]
+     **
+     * Easeout easing
+     - n (number) input 0..1
+     = (number) output 0..1
+    \*/
+    mina.easeout = function (n) {
+        return Math.pow(n, 1.7);
+    };
+    /*\
+     * mina.easein
+     [ method ]
+     **
+     * Easein easing
+     - n (number) input 0..1
+     = (number) output 0..1
+    \*/
+    mina.easein = function (n) {
+        return Math.pow(n, .48);
+    };
+    /*\
+     * mina.easeinout
+     [ method ]
+     **
+     * Easeinout easing
+     - n (number) input 0..1
+     = (number) output 0..1
+    \*/
+    mina.easeinout = function (n) {
+        if (n == 1) {
+            return 1;
+        }
+        if (n == 0) {
+            return 0;
+        }
+        var q = .48 - n / 1.04,
+            Q = Math.sqrt(.1734 + q * q),
+            x = Q - q,
+            X = Math.pow(Math.abs(x), 1 / 3) * (x < 0 ? -1 : 1),
+            y = -Q - q,
+            Y = Math.pow(Math.abs(y), 1 / 3) * (y < 0 ? -1 : 1),
+            t = X + Y + .5;
+        return (1 - t) * 3 * t * t + t * t * t;
+    };
+    /*\
+     * mina.backin
+     [ method ]
+     **
+     * Backin easing
+     - n (number) input 0..1
+     = (number) output 0..1
+    \*/
+    mina.backin = function (n) {
+        if (n == 1) {
+            return 1;
+        }
+        var s = 1.70158;
+        return n * n * ((s + 1) * n - s);
+    };
+    /*\
+     * mina.backout
+     [ method ]
+     **
+     * Backout easing
+     - n (number) input 0..1
+     = (number) output 0..1
+    \*/
+    mina.backout = function (n) {
+        if (n == 0) {
+            return 0;
+        }
+        n = n - 1;
+        var s = 1.70158;
+        return n * n * ((s + 1) * n + s) + 1;
+    };
+    /*\
+     * mina.elastic
+     [ method ]
+     **
+     * Elastic easing
+     - n (number) input 0..1
+     = (number) output 0..1
+    \*/
+    mina.elastic = function (n) {
+        if (n == !!n) {
+            return n;
+        }
+        return Math.pow(2, -10 * n) * Math.sin((n - .075) *
+            (2 * Math.PI) / .3) + 1;
+    };
+    /*\
+     * mina.bounce
+     [ method ]
+     **
+     * Bounce easing
+     - n (number) input 0..1
+     = (number) output 0..1
+    \*/
+    mina.bounce = function (n) {
+        var s = 7.5625,
+            p = 2.75,
+            l;
+        if (n < (1 / p)) {
+            l = s * n * n;
+        } else {
+            if (n < (2 / p)) {
+                n -= (1.5 / p);
+                l = s * n * n + .75;
+            } else {
+                if (n < (2.5 / p)) {
+                    n -= (2.25 / p);
+                    l = s * n * n + .9375;
+                } else {
+                    n -= (2.625 / p);
+                    l = s * n * n + .984375;
+                }
+            }
+        }
+        return l;
+    };
+    window.mina = mina;
+    return mina;
+})(typeof eve == "undefined" ? function () {} : eve);
+// Copyright (c) 2013 - 2015 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var Snap = (function(root) {
+Snap.version = "0.4.0";
+/*\
+ * Snap
+ [ method ]
+ **
+ * Creates a drawing surface or wraps existing SVG element.
+ **
+ - width (number|string) width of surface
+ - height (number|string) height of surface
+ * or
+ - DOM (SVGElement) element to be wrapped into Snap structure
+ * or
+ - array (array) array of elements (will return set of elements)
+ * or
+ - query (string) CSS query selector
+ = (object) @Element
+\*/
+function Snap(w, h) {
+    if (w) {
+        if (w.nodeType) {
+            return wrap(w);
+        }
+        if (is(w, "array") && Snap.set) {
+            return Snap.set.apply(Snap, w);
+        }
+        if (w instanceof Element) {
+            return w;
+        }
+        if (h == null) {
+            w = glob.doc.querySelector(String(w));
+            return wrap(w);
+        }
+    }
+    w = w == null ? "100%" : w;
+    h = h == null ? "100%" : h;
+    return new Paper(w, h);
+}
+Snap.toString = function () {
+    return "Snap v" + this.version;
+};
+Snap._ = {};
+var glob = {
+    win: root.window,
+    doc: root.window.document
+};
+Snap._.glob = glob;
+var has = "hasOwnProperty",
+    Str = String,
+    toFloat = parseFloat,
+    toInt = parseInt,
+    math = Math,
+    mmax = math.max,
+    mmin = math.min,
+    abs = math.abs,
+    pow = math.pow,
+    PI = math.PI,
+    round = math.round,
+    E = "",
+    S = " ",
+    objectToString = Object.prototype.toString,
+    ISURL = /^url\(['"]?([^\)]+?)['"]?\)$/i,
+    colourRegExp = /^\s*((#[a-f\d]{6})|(#[a-f\d]{3})|rgba?\(\s*([\d\.]+%?\s*,\s*[\d\.]+%?\s*,\s*[\d\.]+%?(?:\s*,\s*[\d\.]+%?)?)\s*\)|hsba?\(\s*([\d\.]+(?:deg|\xb0|%)?\s*,\s*[\d\.]+%?\s*,\s*[\d\.]+(?:%?\s*,\s*[\d\.]+)?%?)\s*\)|hsla?\(\s*([\d\.]+(?:deg|\xb0|%)?\s*,\s*[\d\.]+%?\s*,\s*[\d\.]+(?:%?\s*,\s*[\d\.]+)?%?)\s*\))\s*$/i,
+    bezierrg = /^(?:cubic-)?bezier\(([^,]+),([^,]+),([^,]+),([^\)]+)\)/,
+    reURLValue = /^url\(#?([^)]+)\)$/,
+    separator = Snap._.separator = /[,\s]+/,
+    whitespace = /[\s]/g,
+    commaSpaces = /[\s]*,[\s]*/,
+    hsrg = {hs: 1, rg: 1},
+    pathCommand = /([a-z])[\s,]*((-?\d*\.?\d*(?:e[\-+]?\d+)?[\s]*,?[\s]*)+)/ig,
+    tCommand = /([rstm])[\s,]*((-?\d*\.?\d*(?:e[\-+]?\d+)?[\s]*,?[\s]*)+)/ig,
+    pathValues = /(-?\d*\.?\d*(?:e[\-+]?\\d+)?)[\s]*,?[\s]*/ig,
+    idgen = 0,
+    idprefix = "S" + (+new Date).toString(36),
+    ID = function (el) {
+        return (el && el.type ? el.type : E) + idprefix + (idgen++).toString(36);
+    },
+    xlink = "http://www.w3.org/1999/xlink",
+    xmlns = "http://www.w3.org/2000/svg",
+    hub = {},
+    URL = Snap.url = function (url) {
+        return "url('#" + url + "')";
+    };
+
+function $(el, attr) {
+    if (attr) {
+        if (el == "#text") {
+            el = glob.doc.createTextNode(attr.text || attr["#text"] || "");
+        }
+        if (el == "#comment") {
+            el = glob.doc.createComment(attr.text || attr["#text"] || "");
+        }
+        if (typeof el == "string") {
+            el = $(el);
+        }
+        if (typeof attr == "string") {
+            if (el.nodeType == 1) {
+                if (attr.substring(0, 6) == "xlink:") {
+                    return el.getAttributeNS(xlink, attr.substring(6));
+                }
+                if (attr.substring(0, 4) == "xml:") {
+                    return el.getAttributeNS(xmlns, attr.substring(4));
+                }
+                return el.getAttribute(attr);
+            } else if (attr == "text") {
+                return el.nodeValue;
+            } else {
+                return null;
+            }
+        }
+        if (el.nodeType == 1) {
+            for (var key in attr) if (attr[has](key)) {
+                var val = Str(attr[key]);
+                if (val) {
+                    if (key.substring(0, 6) == "xlink:") {
+                        el.setAttributeNS(xlink, key.substring(6), val);
+                    } else if (key.substring(0, 4) == "xml:") {
+                        el.setAttributeNS(xmlns, key.substring(4), val);
+                    } else {
+                        el.setAttribute(key, val);
+                    }
+                } else {
+                    el.removeAttribute(key);
+                }
+            }
+        } else if ("text" in attr) {
+            el.nodeValue = attr.text;
+        }
+    } else {
+        el = glob.doc.createElementNS(xmlns, el);
+    }
+    return el;
+}
+Snap._.$ = $;
+Snap._.id = ID;
+function getAttrs(el) {
+    var attrs = el.attributes,
+        name,
+        out = {};
+    for (var i = 0; i < attrs.length; i++) {
+        if (attrs[i].namespaceURI == xlink) {
+            name = "xlink:";
+        } else {
+            name = "";
+        }
+        name += attrs[i].name;
+        out[name] = attrs[i].textContent;
+    }
+    return out;
+}
+function is(o, type) {
+    type = Str.prototype.toLowerCase.call(type);
+    if (type == "finite") {
+        return isFinite(o);
+    }
+    if (type == "array" &&
+        (o instanceof Array || Array.isArray && Array.isArray(o))) {
+        return true;
+    }
+    return  (type == "null" && o === null) ||
+            (type == typeof o && o !== null) ||
+            (type == "object" && o === Object(o)) ||
+            objectToString.call(o).slice(8, -1).toLowerCase() == type;
+}
+/*\
+ * Snap.format
+ [ method ]
+ **
+ * Replaces construction of type `{<name>}` to the corresponding argument
+ **
+ - token (string) string to format
+ - json (object) object which properties are used as a replacement
+ = (string) formatted string
+ > Usage
+ | // this draws a rectangular shape equivalent to "M10,20h40v50h-40z"
+ | paper.path(Snap.format("M{x},{y}h{dim.width}v{dim.height}h{dim['negative width']}z", {
+ |     x: 10,
+ |     y: 20,
+ |     dim: {
+ |         width: 40,
+ |         height: 50,
+ |         "negative width": -40
+ |     }
+ | }));
+\*/
+Snap.format = (function () {
+    var tokenRegex = /\{([^\}]+)\}/g,
+        objNotationRegex = /(?:(?:^|\.)(.+?)(?=\[|\.|$|\()|\[('|")(.+?)\2\])(\(\))?/g, // matches .xxxxx or ["xxxxx"] to run over object properties
+        replacer = function (all, key, obj) {
+            var res = obj;
+            key.replace(objNotationRegex, function (all, name, quote, quotedName, isFunc) {
+                name = name || quotedName;
+                if (res) {
+                    if (name in res) {
+                        res = res[name];
+                    }
+                    typeof res == "function" && isFunc && (res = res());
+                }
+            });
+            res = (res == null || res == obj ? all : res) + "";
+            return res;
+        };
+    return function (str, obj) {
+        return Str(str).replace(tokenRegex, function (all, key) {
+            return replacer(all, key, obj);
+        });
+    };
+})();
+function clone(obj) {
+    if (typeof obj == "function" || Object(obj) !== obj) {
+        return obj;
+    }
+    var res = new obj.constructor;
+    for (var key in obj) if (obj[has](key)) {
+        res[key] = clone(obj[key]);
+    }
+    return res;
+}
+Snap._.clone = clone;
+function repush(array, item) {
+    for (var i = 0, ii = array.length; i < ii; i++) if (array[i] === item) {
+        return array.push(array.splice(i, 1)[0]);
+    }
+}
+function cacher(f, scope, postprocessor) {
+    function newf() {
+        var arg = Array.prototype.slice.call(arguments, 0),
+            args = arg.join("\u2400"),
+            cache = newf.cache = newf.cache || {},
+            count = newf.count = newf.count || [];
+        if (cache[has](args)) {
+            repush(count, args);
+            return postprocessor ? postprocessor(cache[args]) : cache[args];
+        }
+        count.length >= 1e3 && delete cache[count.shift()];
+        count.push(args);
+        cache[args] = f.apply(scope, arg);
+        return postprocessor ? postprocessor(cache[args]) : cache[args];
+    }
+    return newf;
+}
+Snap._.cacher = cacher;
+function angle(x1, y1, x2, y2, x3, y3) {
+    if (x3 == null) {
+        var x = x1 - x2,
+            y = y1 - y2;
+        if (!x && !y) {
+            return 0;
+        }
+        return (180 + math.atan2(-y, -x) * 180 / PI + 360) % 360;
+    } else {
+        return angle(x1, y1, x3, y3) - angle(x2, y2, x3, y3);
+    }
+}
+function rad(deg) {
+    return deg % 360 * PI / 180;
+}
+function deg(rad) {
+    return rad * 180 / PI % 360;
+}
+function x_y() {
+    return this.x + S + this.y;
+}
+function x_y_w_h() {
+    return this.x + S + this.y + S + this.width + " \xd7 " + this.height;
+}
+
+/*\
+ * Snap.rad
+ [ method ]
+ **
+ * Transform angle to radians
+ - deg (number) angle in degrees
+ = (number) angle in radians
+\*/
+Snap.rad = rad;
+/*\
+ * Snap.deg
+ [ method ]
+ **
+ * Transform angle to degrees
+ - rad (number) angle in radians
+ = (number) angle in degrees
+\*/
+Snap.deg = deg;
+/*\
+ * Snap.sin
+ [ method ]
+ **
+ * Equivalent to `Math.sin()` only works with degrees, not radians.
+ - angle (number) angle in degrees
+ = (number) sin
+\*/
+Snap.sin = function (angle) {
+    return math.sin(Snap.rad(angle));
+};
+/*\
+ * Snap.tan
+ [ method ]
+ **
+ * Equivalent to `Math.tan()` only works with degrees, not radians.
+ - angle (number) angle in degrees
+ = (number) tan
+\*/
+Snap.tan = function (angle) {
+    return math.tan(Snap.rad(angle));
+};
+/*\
+ * Snap.cos
+ [ method ]
+ **
+ * Equivalent to `Math.cos()` only works with degrees, not radians.
+ - angle (number) angle in degrees
+ = (number) cos
+\*/
+Snap.cos = function (angle) {
+    return math.cos(Snap.rad(angle));
+};
+/*\
+ * Snap.asin
+ [ method ]
+ **
+ * Equivalent to `Math.asin()` only works with degrees, not radians.
+ - num (number) value
+ = (number) asin in degrees
+\*/
+Snap.asin = function (num) {
+    return Snap.deg(math.asin(num));
+};
+/*\
+ * Snap.acos
+ [ method ]
+ **
+ * Equivalent to `Math.acos()` only works with degrees, not radians.
+ - num (number) value
+ = (number) acos in degrees
+\*/
+Snap.acos = function (num) {
+    return Snap.deg(math.acos(num));
+};
+/*\
+ * Snap.atan
+ [ method ]
+ **
+ * Equivalent to `Math.atan()` only works with degrees, not radians.
+ - num (number) value
+ = (number) atan in degrees
+\*/
+Snap.atan = function (num) {
+    return Snap.deg(math.atan(num));
+};
+/*\
+ * Snap.atan2
+ [ method ]
+ **
+ * Equivalent to `Math.atan2()` only works with degrees, not radians.
+ - num (number) value
+ = (number) atan2 in degrees
+\*/
+Snap.atan2 = function (num) {
+    return Snap.deg(math.atan2(num));
+};
+/*\
+ * Snap.angle
+ [ method ]
+ **
+ * Returns an angle between two or three points
+ > Parameters
+ - x1 (number) x coord of first point
+ - y1 (number) y coord of first point
+ - x2 (number) x coord of second point
+ - y2 (number) y coord of second point
+ - x3 (number) #optional x coord of third point
+ - y3 (number) #optional y coord of third point
+ = (number) angle in degrees
+\*/
+Snap.angle = angle;
+/*\
+ * Snap.len
+ [ method ]
+ **
+ * Returns distance between two points
+ > Parameters
+ - x1 (number) x coord of first point
+ - y1 (number) y coord of first point
+ - x2 (number) x coord of second point
+ - y2 (number) y coord of second point
+ = (number) distance
+\*/
+Snap.len = function (x1, y1, x2, y2) {
+    return Math.sqrt(Snap.len2(x1, y1, x2, y2));
+};
+/*\
+ * Snap.len2
+ [ method ]
+ **
+ * Returns squared distance between two points
+ > Parameters
+ - x1 (number) x coord of first point
+ - y1 (number) y coord of first point
+ - x2 (number) x coord of second point
+ - y2 (number) y coord of second point
+ = (number) distance
+\*/
+Snap.len2 = function (x1, y1, x2, y2) {
+    return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
+};
+/*\
+ * Snap.closestPoint
+ [ method ]
+ **
+ * Returns closest point to a given one on a given path.
+ > Parameters
+ - path (Element) path element
+ - x (number) x coord of a point
+ - y (number) y coord of a point
+ = (object) in format
+ {
+    x (number) x coord of the point on the path
+    y (number) y coord of the point on the path
+    length (number) length of the path to the point
+    distance (number) distance from the given point to the path
+ }
+\*/
+// Copied from http://bl.ocks.org/mbostock/8027637
+Snap.closestPoint = function (path, x, y) {
+    function distance2(p) {
+        var dx = p.x - x,
+            dy = p.y - y;
+        return dx * dx + dy * dy;
+    }
+    var pathNode = path.node,
+        pathLength = pathNode.getTotalLength(),
+        precision = pathLength / pathNode.pathSegList.numberOfItems * .125,
+        best,
+        bestLength,
+        bestDistance = Infinity;
+
+    // linear scan for coarse approximation
+    for (var scan, scanLength = 0, scanDistance; scanLength <= pathLength; scanLength += precision) {
+        if ((scanDistance = distance2(scan = pathNode.getPointAtLength(scanLength))) < bestDistance) {
+            best = scan, bestLength = scanLength, bestDistance = scanDistance;
+        }
+    }
+
+    // binary search for precise estimate
+    precision *= .5;
+    while (precision > .5) {
+        var before,
+            after,
+            beforeLength,
+            afterLength,
+            beforeDistance,
+            afterDistance;
+        if ((beforeLength = bestLength - precision) >= 0 && (beforeDistance = distance2(before = pathNode.getPointAtLength(beforeLength))) < bestDistance) {
+            best = before, bestLength = beforeLength, bestDistance = beforeDistance;
+        } else if ((afterLength = bestLength + precision) <= pathLength && (afterDistance = distance2(after = pathNode.getPointAtLength(afterLength))) < bestDistance) {
+            best = after, bestLength = afterLength, bestDistance = afterDistance;
+        } else {
+            precision *= .5;
+        }
+    }
+
+    best = {
+        x: best.x,
+        y: best.y,
+        length: bestLength,
+        distance: Math.sqrt(bestDistance)
+    };
+    return best;
+}
+/*\
+ * Snap.is
+ [ method ]
+ **
+ * Handy replacement for the `typeof` operator
+ - o (…) any object or primitive
+ - type (string) name of the type, e.g., `string`, `function`, `number`, etc.
+ = (boolean) `true` if given value is of given type
+\*/
+Snap.is = is;
+/*\
+ * Snap.snapTo
+ [ method ]
+ **
+ * Snaps given value to given grid
+ - values (array|number) given array of values or step of the grid
+ - value (number) value to adjust
+ - tolerance (number) #optional maximum distance to the target value that would trigger the snap. Default is `10`.
+ = (number) adjusted value
+\*/
+Snap.snapTo = function (values, value, tolerance) {
+    tolerance = is(tolerance, "finite") ? tolerance : 10;
+    if (is(values, "array")) {
+        var i = values.length;
+        while (i--) if (abs(values[i] - value) <= tolerance) {
+            return values[i];
+        }
+    } else {
+        values = +values;
+        var rem = value % values;
+        if (rem < tolerance) {
+            return value - rem;
+        }
+        if (rem > values - tolerance) {
+            return value - rem + values;
+        }
+    }
+    return value;
+};
+// Colour
+/*\
+ * Snap.getRGB
+ [ method ]
+ **
+ * Parses color string as RGB object
+ - color (string) color string in one of the following formats:
+ # <ul>
+ #     <li>Color name (<code>red</code>, <code>green</code>, <code>cornflowerblue</code>, etc)</li>
+ #     <li>#••• — shortened HTML color: (<code>#000</code>, <code>#fc0</code>, etc.)</li>
+ #     <li>#•••••• — full length HTML color: (<code>#000000</code>, <code>#bd2300</code>)</li>
+ #     <li>rgb(•••, •••, •••) — red, green and blue channels values: (<code>rgb(200,&nbsp;100,&nbsp;0)</code>)</li>
+ #     <li>rgba(•••, •••, •••, •••) — also with opacity</li>
+ #     <li>rgb(•••%, •••%, •••%) — same as above, but in %: (<code>rgb(100%,&nbsp;175%,&nbsp;0%)</code>)</li>
+ #     <li>rgba(•••%, •••%, •••%, •••%) — also with opacity</li>
+ #     <li>hsb(•••, •••, •••) — hue, saturation and brightness values: (<code>hsb(0.5,&nbsp;0.25,&nbsp;1)</code>)</li>
+ #     <li>hsba(•••, •••, •••, •••) — also with opacity</li>
+ #     <li>hsb(•••%, •••%, •••%) — same as above, but in %</li>
+ #     <li>hsba(•••%, •••%, •••%, •••%) — also with opacity</li>
+ #     <li>hsl(•••, •••, •••) — hue, saturation and luminosity values: (<code>hsb(0.5,&nbsp;0.25,&nbsp;0.5)</code>)</li>
+ #     <li>hsla(•••, •••, •••, •••) — also with opacity</li>
+ #     <li>hsl(•••%, •••%, •••%) — same as above, but in %</li>
+ #     <li>hsla(•••%, •••%, •••%, •••%) — also with opacity</li>
+ # </ul>
+ * Note that `%` can be used any time: `rgb(20%, 255, 50%)`.
+ = (object) RGB object in the following format:
+ o {
+ o     r (number) red,
+ o     g (number) green,
+ o     b (number) blue,
+ o     hex (string) color in HTML/CSS format: #••••••,
+ o     error (boolean) true if string can't be parsed
+ o }
+\*/
+Snap.getRGB = cacher(function (colour) {
+    if (!colour || !!((colour = Str(colour)).indexOf("-") + 1)) {
+        return {r: -1, g: -1, b: -1, hex: "none", error: 1, toString: rgbtoString};
+    }
+    if (colour == "none") {
+        return {r: -1, g: -1, b: -1, hex: "none", toString: rgbtoString};
+    }
+    !(hsrg[has](colour.toLowerCase().substring(0, 2)) || colour.charAt() == "#") && (colour = toHex(colour));
+    if (!colour) {
+        return {r: -1, g: -1, b: -1, hex: "none", error: 1, toString: rgbtoString};
+    }
+    var res,
+        red,
+        green,
+        blue,
+        opacity,
+        t,
+        values,
+        rgb = colour.match(colourRegExp);
+    if (rgb) {
+        if (rgb[2]) {
+            blue = toInt(rgb[2].substring(5), 16);
+            green = toInt(rgb[2].substring(3, 5), 16);
+            red = toInt(rgb[2].substring(1, 3), 16);
+        }
+        if (rgb[3]) {
+            blue = toInt((t = rgb[3].charAt(3)) + t, 16);
+            green = toInt((t = rgb[3].charAt(2)) + t, 16);
+            red = toInt((t = rgb[3].charAt(1)) + t, 16);
+        }
+        if (rgb[4]) {
+            values = rgb[4].split(commaSpaces);
+            red = toFloat(values[0]);
+            values[0].slice(-1) == "%" && (red *= 2.55);
+            green = toFloat(values[1]);
+            values[1].slice(-1) == "%" && (green *= 2.55);
+            blue = toFloat(values[2]);
+            values[2].slice(-1) == "%" && (blue *= 2.55);
+            rgb[1].toLowerCase().slice(0, 4) == "rgba" && (opacity = toFloat(values[3]));
+            values[3] && values[3].slice(-1) == "%" && (opacity /= 100);
+        }
+        if (rgb[5]) {
+            values = rgb[5].split(commaSpaces);
+            red = toFloat(values[0]);
+            values[0].slice(-1) == "%" && (red /= 100);
+            green = toFloat(values[1]);
+            values[1].slice(-1) == "%" && (green /= 100);
+            blue = toFloat(values[2]);
+            values[2].slice(-1) == "%" && (blue /= 100);
+            (values[0].slice(-3) == "deg" || values[0].slice(-1) == "\xb0") && (red /= 360);
+            rgb[1].toLowerCase().slice(0, 4) == "hsba" && (opacity = toFloat(values[3]));
+            values[3] && values[3].slice(-1) == "%" && (opacity /= 100);
+            return Snap.hsb2rgb(red, green, blue, opacity);
+        }
+        if (rgb[6]) {
+            values = rgb[6].split(commaSpaces);
+            red = toFloat(values[0]);
+            values[0].slice(-1) == "%" && (red /= 100);
+            green = toFloat(values[1]);
+            values[1].slice(-1) == "%" && (green /= 100);
+            blue = toFloat(values[2]);
+            values[2].slice(-1) == "%" && (blue /= 100);
+            (values[0].slice(-3) == "deg" || values[0].slice(-1) == "\xb0") && (red /= 360);
+            rgb[1].toLowerCase().slice(0, 4) == "hsla" && (opacity = toFloat(values[3]));
+            values[3] && values[3].slice(-1) == "%" && (opacity /= 100);
+            return Snap.hsl2rgb(red, green, blue, opacity);
+        }
+        red = mmin(math.round(red), 255);
+        green = mmin(math.round(green), 255);
+        blue = mmin(math.round(blue), 255);
+        opacity = mmin(mmax(opacity, 0), 1);
+        rgb = {r: red, g: green, b: blue, toString: rgbtoString};
+        rgb.hex = "#" + (16777216 | blue | (green << 8) | (red << 16)).toString(16).slice(1);
+        rgb.opacity = is(opacity, "finite") ? opacity : 1;
+        return rgb;
+    }
+    return {r: -1, g: -1, b: -1, hex: "none", error: 1, toString: rgbtoString};
+}, Snap);
+/*\
+ * Snap.hsb
+ [ method ]
+ **
+ * Converts HSB values to a hex representation of the color
+ - h (number) hue
+ - s (number) saturation
+ - b (number) value or brightness
+ = (string) hex representation of the color
+\*/
+Snap.hsb = cacher(function (h, s, b) {
+    return Snap.hsb2rgb(h, s, b).hex;
+});
+/*\
+ * Snap.hsl
+ [ method ]
+ **
+ * Converts HSL values to a hex representation of the color
+ - h (number) hue
+ - s (number) saturation
+ - l (number) luminosity
+ = (string) hex representation of the color
+\*/
+Snap.hsl = cacher(function (h, s, l) {
+    return Snap.hsl2rgb(h, s, l).hex;
+});
+/*\
+ * Snap.rgb
+ [ method ]
+ **
+ * Converts RGB values to a hex representation of the color
+ - r (number) red
+ - g (number) green
+ - b (number) blue
+ = (string) hex representation of the color
+\*/
+Snap.rgb = cacher(function (r, g, b, o) {
+    if (is(o, "finite")) {
+        var round = math.round;
+        return "rgba(" + [round(r), round(g), round(b), +o.toFixed(2)] + ")";
+    }
+    return "#" + (16777216 | b | (g << 8) | (r << 16)).toString(16).slice(1);
+});
+var toHex = function (color) {
+    var i = glob.doc.getElementsByTagName("head")[0] || glob.doc.getElementsByTagName("svg")[0],
+        red = "rgb(255, 0, 0)";
+    toHex = cacher(function (color) {
+        if (color.toLowerCase() == "red") {
+            return red;
+        }
+        i.style.color = red;
+        i.style.color = color;
+        var out = glob.doc.defaultView.getComputedStyle(i, E).getPropertyValue("color");
+        return out == red ? null : out;
+    });
+    return toHex(color);
+},
+hsbtoString = function () {
+    return "hsb(" + [this.h, this.s, this.b] + ")";
+},
+hsltoString = function () {
+    return "hsl(" + [this.h, this.s, this.l] + ")";
+},
+rgbtoString = function () {
+    return this.opacity == 1 || this.opacity == null ?
+            this.hex :
+            "rgba(" + [this.r, this.g, this.b, this.opacity] + ")";
+},
+prepareRGB = function (r, g, b) {
+    if (g == null && is(r, "object") && "r" in r && "g" in r && "b" in r) {
+        b = r.b;
+        g = r.g;
+        r = r.r;
+    }
+    if (g == null && is(r, string)) {
+        var clr = Snap.getRGB(r);
+        r = clr.r;
+        g = clr.g;
+        b = clr.b;
+    }
+    if (r > 1 || g > 1 || b > 1) {
+        r /= 255;
+        g /= 255;
+        b /= 255;
+    }
+
+    return [r, g, b];
+},
+packageRGB = function (r, g, b, o) {
+    r = math.round(r * 255);
+    g = math.round(g * 255);
+    b = math.round(b * 255);
+    var rgb = {
+        r: r,
+        g: g,
+        b: b,
+        opacity: is(o, "finite") ? o : 1,
+        hex: Snap.rgb(r, g, b),
+        toString: rgbtoString
+    };
+    is(o, "finite") && (rgb.opacity = o);
+    return rgb;
+};
+/*\
+ * Snap.color
+ [ method ]
+ **
+ * Parses the color string and returns an object featuring the color's component values
+ - clr (string) color string in one of the supported formats (see @Snap.getRGB)
+ = (object) Combined RGB/HSB object in the following format:
+ o {
+ o     r (number) red,
+ o     g (number) green,
+ o     b (number) blue,
+ o     hex (string) color in HTML/CSS format: #••••••,
+ o     error (boolean) `true` if string can't be parsed,
+ o     h (number) hue,
+ o     s (number) saturation,
+ o     v (number) value (brightness),
+ o     l (number) lightness
+ o }
+\*/
+Snap.color = function (clr) {
+    var rgb;
+    if (is(clr, "object") && "h" in clr && "s" in clr && "b" in clr) {
+        rgb = Snap.hsb2rgb(clr);
+        clr.r = rgb.r;
+        clr.g = rgb.g;
+        clr.b = rgb.b;
+        clr.opacity = 1;
+        clr.hex = rgb.hex;
+    } else if (is(clr, "object") && "h" in clr && "s" in clr && "l" in clr) {
+        rgb = Snap.hsl2rgb(clr);
+        clr.r = rgb.r;
+        clr.g = rgb.g;
+        clr.b = rgb.b;
+        clr.opacity = 1;
+        clr.hex = rgb.hex;
+    } else {
+        if (is(clr, "string")) {
+            clr = Snap.getRGB(clr);
+        }
+        if (is(clr, "object") && "r" in clr && "g" in clr && "b" in clr && !("error" in clr)) {
+            rgb = Snap.rgb2hsl(clr);
+            clr.h = rgb.h;
+            clr.s = rgb.s;
+            clr.l = rgb.l;
+            rgb = Snap.rgb2hsb(clr);
+            clr.v = rgb.b;
+        } else {
+            clr = {hex: "none"};
+            clr.r = clr.g = clr.b = clr.h = clr.s = clr.v = clr.l = -1;
+            clr.error = 1;
+        }
+    }
+    clr.toString = rgbtoString;
+    return clr;
+};
+/*\
+ * Snap.hsb2rgb
+ [ method ]
+ **
+ * Converts HSB values to an RGB object
+ - h (number) hue
+ - s (number) saturation
+ - v (number) value or brightness
+ = (object) RGB object in the following format:
+ o {
+ o     r (number) red,
+ o     g (number) green,
+ o     b (number) blue,
+ o     hex (string) color in HTML/CSS format: #••••••
+ o }
+\*/
+Snap.hsb2rgb = function (h, s, v, o) {
+    if (is(h, "object") && "h" in h && "s" in h && "b" in h) {
+        v = h.b;
+        s = h.s;
+        o = h.o;
+        h = h.h;
+    }
+    h *= 360;
+    var R, G, B, X, C;
+    h = (h % 360) / 60;
+    C = v * s;
+    X = C * (1 - abs(h % 2 - 1));
+    R = G = B = v - C;
+
+    h = ~~h;
+    R += [C, X, 0, 0, X, C][h];
+    G += [X, C, C, X, 0, 0][h];
+    B += [0, 0, X, C, C, X][h];
+    return packageRGB(R, G, B, o);
+};
+/*\
+ * Snap.hsl2rgb
+ [ method ]
+ **
+ * Converts HSL values to an RGB object
+ - h (number) hue
+ - s (number) saturation
+ - l (number) luminosity
+ = (object) RGB object in the following format:
+ o {
+ o     r (number) red,
+ o     g (number) green,
+ o     b (number) blue,
+ o     hex (string) color in HTML/CSS format: #••••••
+ o }
+\*/
+Snap.hsl2rgb = function (h, s, l, o) {
+    if (is(h, "object") && "h" in h && "s" in h && "l" in h) {
+        l = h.l;
+        s = h.s;
+        h = h.h;
+    }
+    if (h > 1 || s > 1 || l > 1) {
+        h /= 360;
+        s /= 100;
+        l /= 100;
+    }
+    h *= 360;
+    var R, G, B, X, C;
+    h = (h % 360) / 60;
+    C = 2 * s * (l < .5 ? l : 1 - l);
+    X = C * (1 - abs(h % 2 - 1));
+    R = G = B = l - C / 2;
+
+    h = ~~h;
+    R += [C, X, 0, 0, X, C][h];
+    G += [X, C, C, X, 0, 0][h];
+    B += [0, 0, X, C, C, X][h];
+    return packageRGB(R, G, B, o);
+};
+/*\
+ * Snap.rgb2hsb
+ [ method ]
+ **
+ * Converts RGB values to an HSB object
+ - r (number) red
+ - g (number) green
+ - b (number) blue
+ = (object) HSB object in the following format:
+ o {
+ o     h (number) hue,
+ o     s (number) saturation,
+ o     b (number) brightness
+ o }
+\*/
+Snap.rgb2hsb = function (r, g, b) {
+    b = prepareRGB(r, g, b);
+    r = b[0];
+    g = b[1];
+    b = b[2];
+
+    var H, S, V, C;
+    V = mmax(r, g, b);
+    C = V - mmin(r, g, b);
+    H = (C == 0 ? null :
+         V == r ? (g - b) / C :
+         V == g ? (b - r) / C + 2 :
+                  (r - g) / C + 4
+        );
+    H = ((H + 360) % 6) * 60 / 360;
+    S = C == 0 ? 0 : C / V;
+    return {h: H, s: S, b: V, toString: hsbtoString};
+};
+/*\
+ * Snap.rgb2hsl
+ [ method ]
+ **
+ * Converts RGB values to an HSL object
+ - r (number) red
+ - g (number) green
+ - b (number) blue
+ = (object) HSL object in the following format:
+ o {
+ o     h (number) hue,
+ o     s (number) saturation,
+ o     l (number) luminosity
+ o }
+\*/
+Snap.rgb2hsl = function (r, g, b) {
+    b = prepareRGB(r, g, b);
+    r = b[0];
+    g = b[1];
+    b = b[2];
+
+    var H, S, L, M, m, C;
+    M = mmax(r, g, b);
+    m = mmin(r, g, b);
+    C = M - m;
+    H = (C == 0 ? null :
+         M == r ? (g - b) / C :
+         M == g ? (b - r) / C + 2 :
+                  (r - g) / C + 4);
+    H = ((H + 360) % 6) * 60 / 360;
+    L = (M + m) / 2;
+    S = (C == 0 ? 0 :
+         L < .5 ? C / (2 * L) :
+                  C / (2 - 2 * L));
+    return {h: H, s: S, l: L, toString: hsltoString};
+};
+
+// Transformations
+/*\
+ * Snap.parsePathString
+ [ method ]
+ **
+ * Utility method
+ **
+ * Parses given path string into an array of arrays of path segments
+ - pathString (string|array) path string or array of segments (in the last case it is returned straight away)
+ = (array) array of segments
+\*/
+Snap.parsePathString = function (pathString) {
+    if (!pathString) {
+        return null;
+    }
+    var pth = Snap.path(pathString);
+    if (pth.arr) {
+        return Snap.path.clone(pth.arr);
+    }
+
+    var paramCounts = {a: 7, c: 6, o: 2, h: 1, l: 2, m: 2, r: 4, q: 4, s: 4, t: 2, v: 1, u: 3, z: 0},
+        data = [];
+    if (is(pathString, "array") && is(pathString[0], "array")) { // rough assumption
+        data = Snap.path.clone(pathString);
+    }
+    if (!data.length) {
+        Str(pathString).replace(pathCommand, function (a, b, c) {
+            var params = [],
+                name = b.toLowerCase();
+            c.replace(pathValues, function (a, b) {
+                b && params.push(+b);
+            });
+            if (name == "m" && params.length > 2) {
+                data.push([b].concat(params.splice(0, 2)));
+                name = "l";
+                b = b == "m" ? "l" : "L";
+            }
+            if (name == "o" && params.length == 1) {
+                data.push([b, params[0]]);
+            }
+            if (name == "r") {
+                data.push([b].concat(params));
+            } else while (params.length >= paramCounts[name]) {
+                data.push([b].concat(params.splice(0, paramCounts[name])));
+                if (!paramCounts[name]) {
+                    break;
+                }
+            }
+        });
+    }
+    data.toString = Snap.path.toString;
+    pth.arr = Snap.path.clone(data);
+    return data;
+};
+/*\
+ * Snap.parseTransformString
+ [ method ]
+ **
+ * Utility method
+ **
+ * Parses given transform string into an array of transformations
+ - TString (string|array) transform string or array of transformations (in the last case it is returned straight away)
+ = (array) array of transformations
+\*/
+var parseTransformString = Snap.parseTransformString = function (TString) {
+    if (!TString) {
+        return null;
+    }
+    var paramCounts = {r: 3, s: 4, t: 2, m: 6},
+        data = [];
+    if (is(TString, "array") && is(TString[0], "array")) { // rough assumption
+        data = Snap.path.clone(TString);
+    }
+    if (!data.length) {
+        Str(TString).replace(tCommand, function (a, b, c) {
+            var params = [],
+                name = b.toLowerCase();
+            c.replace(pathValues, function (a, b) {
+                b && params.push(+b);
+            });
+            data.push([b].concat(params));
+        });
+    }
+    data.toString = Snap.path.toString;
+    return data;
+};
+function svgTransform2string(tstr) {
+    var res = [];
+    tstr = tstr.replace(/(?:^|\s)(\w+)\(([^)]+)\)/g, function (all, name, params) {
+        params = params.split(/\s*,\s*|\s+/);
+        if (name == "rotate" && params.length == 1) {
+            params.push(0, 0);
+        }
+        if (name == "scale") {
+            if (params.length > 2) {
+                params = params.slice(0, 2);
+            } else if (params.length == 2) {
+                params.push(0, 0);
+            }
+            if (params.length == 1) {
+                params.push(params[0], 0, 0);
+            }
+        }
+        if (name == "skewX") {
+            res.push(["m", 1, 0, math.tan(rad(params[0])), 1, 0, 0]);
+        } else if (name == "skewY") {
+            res.push(["m", 1, math.tan(rad(params[0])), 0, 1, 0, 0]);
+        } else {
+            res.push([name.charAt(0)].concat(params));
+        }
+        return all;
+    });
+    return res;
+}
+Snap._.svgTransform2string = svgTransform2string;
+Snap._.rgTransform = /^[a-z][\s]*-?\.?\d/i;
+function transform2matrix(tstr, bbox) {
+    var tdata = parseTransformString(tstr),
+        m = new Snap.Matrix;
+    if (tdata) {
+        for (var i = 0, ii = tdata.length; i < ii; i++) {
+            var t = tdata[i],
+                tlen = t.length,
+                command = Str(t[0]).toLowerCase(),
+                absolute = t[0] != command,
+                inver = absolute ? m.invert() : 0,
+                x1,
+                y1,
+                x2,
+                y2,
+                bb;
+            if (command == "t" && tlen == 2){
+                m.translate(t[1], 0);
+            } else if (command == "t" && tlen == 3) {
+                if (absolute) {
+                    x1 = inver.x(0, 0);
+                    y1 = inver.y(0, 0);
+                    x2 = inver.x(t[1], t[2]);
+                    y2 = inver.y(t[1], t[2]);
+                    m.translate(x2 - x1, y2 - y1);
+                } else {
+                    m.translate(t[1], t[2]);
+                }
+            } else if (command == "r") {
+                if (tlen == 2) {
+                    bb = bb || bbox;
+                    m.rotate(t[1], bb.x + bb.width / 2, bb.y + bb.height / 2);
+                } else if (tlen == 4) {
+                    if (absolute) {
+                        x2 = inver.x(t[2], t[3]);
+                        y2 = inver.y(t[2], t[3]);
+                        m.rotate(t[1], x2, y2);
+                    } else {
+                        m.rotate(t[1], t[2], t[3]);
+                    }
+                }
+            } else if (command == "s") {
+                if (tlen == 2 || tlen == 3) {
+                    bb = bb || bbox;
+                    m.scale(t[1], t[tlen - 1], bb.x + bb.width / 2, bb.y + bb.height / 2);
+                } else if (tlen == 4) {
+                    if (absolute) {
+                        x2 = inver.x(t[2], t[3]);
+                        y2 = inver.y(t[2], t[3]);
+                        m.scale(t[1], t[1], x2, y2);
+                    } else {
+                        m.scale(t[1], t[1], t[2], t[3]);
+                    }
+                } else if (tlen == 5) {
+                    if (absolute) {
+                        x2 = inver.x(t[3], t[4]);
+                        y2 = inver.y(t[3], t[4]);
+                        m.scale(t[1], t[2], x2, y2);
+                    } else {
+                        m.scale(t[1], t[2], t[3], t[4]);
+                    }
+                }
+            } else if (command == "m" && tlen == 7) {
+                m.add(t[1], t[2], t[3], t[4], t[5], t[6]);
+            }
+        }
+    }
+    return m;
+}
+Snap._.transform2matrix = transform2matrix;
+Snap._unit2px = unit2px;
+var contains = glob.doc.contains || glob.doc.compareDocumentPosition ?
+    function (a, b) {
+        var adown = a.nodeType == 9 ? a.documentElement : a,
+            bup = b && b.parentNode;
+            return a == bup || !!(bup && bup.nodeType == 1 && (
+                adown.contains ?
+                    adown.contains(bup) :
+                    a.compareDocumentPosition && a.compareDocumentPosition(bup) & 16
+            ));
+    } :
+    function (a, b) {
+        if (b) {
+            while (b) {
+                b = b.parentNode;
+                if (b == a) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    };
+function getSomeDefs(el) {
+    var p = (el.node.ownerSVGElement && wrap(el.node.ownerSVGElement)) ||
+            (el.node.parentNode && wrap(el.node.parentNode)) ||
+            Snap.select("svg") ||
+            Snap(0, 0),
+        pdefs = p.select("defs"),
+        defs  = pdefs == null ? false : pdefs.node;
+    if (!defs) {
+        defs = make("defs", p.node).node;
+    }
+    return defs;
+}
+function getSomeSVG(el) {
+    return el.node.ownerSVGElement && wrap(el.node.ownerSVGElement) || Snap.select("svg");
+}
+Snap._.getSomeDefs = getSomeDefs;
+Snap._.getSomeSVG = getSomeSVG;
+function unit2px(el, name, value) {
+    var svg = getSomeSVG(el).node,
+        out = {},
+        mgr = svg.querySelector(".svg---mgr");
+    if (!mgr) {
+        mgr = $("rect");
+        $(mgr, {x: -9e9, y: -9e9, width: 10, height: 10, "class": "svg---mgr", fill: "none"});
+        svg.appendChild(mgr);
+    }
+    function getW(val) {
+        if (val == null) {
+            return E;
+        }
+        if (val == +val) {
+            return val;
+        }
+        $(mgr, {width: val});
+        try {
+            return mgr.getBBox().width;
+        } catch (e) {
+            return 0;
+        }
+    }
+    function getH(val) {
+        if (val == null) {
+            return E;
+        }
+        if (val == +val) {
+            return val;
+        }
+        $(mgr, {height: val});
+        try {
+            return mgr.getBBox().height;
+        } catch (e) {
+            return 0;
+        }
+    }
+    function set(nam, f) {
+        if (name == null) {
+            out[nam] = f(el.attr(nam) || 0);
+        } else if (nam == name) {
+            out = f(value == null ? el.attr(nam) || 0 : value);
+        }
+    }
+    switch (el.type) {
+        case "rect":
+            set("rx", getW);
+            set("ry", getH);
+        case "image":
+            set("width", getW);
+            set("height", getH);
+        case "text":
+            set("x", getW);
+            set("y", getH);
+        break;
+        case "circle":
+            set("cx", getW);
+            set("cy", getH);
+            set("r", getW);
+        break;
+        case "ellipse":
+            set("cx", getW);
+            set("cy", getH);
+            set("rx", getW);
+            set("ry", getH);
+        break;
+        case "line":
+            set("x1", getW);
+            set("x2", getW);
+            set("y1", getH);
+            set("y2", getH);
+        break;
+        case "marker":
+            set("refX", getW);
+            set("markerWidth", getW);
+            set("refY", getH);
+            set("markerHeight", getH);
+        break;
+        case "radialGradient":
+            set("fx", getW);
+            set("fy", getH);
+        break;
+        case "tspan":
+            set("dx", getW);
+            set("dy", getH);
+        break;
+        default:
+            set(name, getW);
+    }
+    svg.removeChild(mgr);
+    return out;
+}
+/*\
+ * Snap.select
+ [ method ]
+ **
+ * Wraps a DOM element specified by CSS selector as @Element
+ - query (string) CSS selector of the element
+ = (Element) the current element
+\*/
+Snap.select = function (query) {
+    query = Str(query).replace(/([^\\]):/g, "$1\\:");
+    return wrap(glob.doc.querySelector(query));
+};
+/*\
+ * Snap.selectAll
+ [ method ]
+ **
+ * Wraps DOM elements specified by CSS selector as set or array of @Element
+ - query (string) CSS selector of the element
+ = (Element) the current element
+\*/
+Snap.selectAll = function (query) {
+    var nodelist = glob.doc.querySelectorAll(query),
+        set = (Snap.set || Array)();
+    for (var i = 0; i < nodelist.length; i++) {
+        set.push(wrap(nodelist[i]));
+    }
+    return set;
+};
+
+function add2group(list) {
+    if (!is(list, "array")) {
+        list = Array.prototype.slice.call(arguments, 0);
+    }
+    var i = 0,
+        j = 0,
+        node = this.node;
+    while (this[i]) delete this[i++];
+    for (i = 0; i < list.length; i++) {
+        if (list[i].type == "set") {
+            list[i].forEach(function (el) {
+                node.appendChild(el.node);
+            });
+        } else {
+            node.appendChild(list[i].node);
+        }
+    }
+    var children = node.childNodes;
+    for (i = 0; i < children.length; i++) {
+        this[j++] = wrap(children[i]);
+    }
+    return this;
+}
+// Hub garbage collector every 10s
+setInterval(function () {
+    for (var key in hub) if (hub[has](key)) {
+        var el = hub[key],
+            node = el.node;
+        if (el.type != "svg" && !node.ownerSVGElement || el.type == "svg" && (!node.parentNode || "ownerSVGElement" in node.parentNode && !node.ownerSVGElement)) {
+            delete hub[key];
+        }
+    }
+}, 1e4);
+function Element(el) {
+    if (el.snap in hub) {
+        return hub[el.snap];
+    }
+    var svg;
+    try {
+        svg = el.ownerSVGElement;
+    } catch(e) {}
+    /*\
+     * Element.node
+     [ property (object) ]
+     **
+     * Gives you a reference to the DOM object, so you can assign event handlers or just mess around.
+     > Usage
+     | // draw a circle at coordinate 10,10 with radius of 10
+     | var c = paper.circle(10, 10, 10);
+     | c.node.onclick = function () {
+     |     c.attr("fill", "red");
+     | };
+    \*/
+    this.node = el;
+    if (svg) {
+        this.paper = new Paper(svg);
+    }
+    /*\
+     * Element.type
+     [ property (string) ]
+     **
+     * SVG tag name of the given element.
+    \*/
+    this.type = el.tagName || el.nodeName;
+    var id = this.id = ID(this);
+    this.anims = {};
+    this._ = {
+        transform: []
+    };
+    el.snap = id;
+    hub[id] = this;
+    if (this.type == "g") {
+        this.add = add2group;
+    }
+    if (this.type in {g: 1, mask: 1, pattern: 1, symbol: 1}) {
+        for (var method in Paper.prototype) if (Paper.prototype[has](method)) {
+            this[method] = Paper.prototype[method];
+        }
+    }
+}
+   /*\
+     * Element.attr
+     [ method ]
+     **
+     * Gets or sets given attributes of the element.
+     **
+     - params (object) contains key-value pairs of attributes you want to set
+     * or
+     - param (string) name of the attribute
+     = (Element) the current element
+     * or
+     = (string) value of attribute
+     > Usage
+     | el.attr({
+     |     fill: "#fc0",
+     |     stroke: "#000",
+     |     strokeWidth: 2, // CamelCase...
+     |     "fill-opacity": 0.5, // or dash-separated names
+     |     width: "*=2" // prefixed values
+     | });
+     | console.log(el.attr("fill")); // #fc0
+     * Prefixed values in format `"+=10"` supported. All four operations
+     * (`+`, `-`, `*` and `/`) could be used. Optionally you can use units for `+`
+     * and `-`: `"+=2em"`.
+    \*/
+    Element.prototype.attr = function (params, value) {
+        var el = this,
+            node = el.node;
+        if (!params) {
+            if (node.nodeType != 1) {
+                return {
+                    text: node.nodeValue
+                };
+            }
+            var attr = node.attributes,
+                out = {};
+            for (var i = 0, ii = attr.length; i < ii; i++) {
+                out[attr[i].nodeName] = attr[i].nodeValue;
+            }
+            return out;
+        }
+        if (is(params, "string")) {
+            if (arguments.length > 1) {
+                var json = {};
+                json[params] = value;
+                params = json;
+            } else {
+                return eve("snap.util.getattr." + params, el).firstDefined();
+            }
+        }
+        for (var att in params) {
+            if (params[has](att)) {
+                eve("snap.util.attr." + att, el, params[att]);
+            }
+        }
+        return el;
+    };
+/*\
+ * Snap.parse
+ [ method ]
+ **
+ * Parses SVG fragment and converts it into a @Fragment
+ **
+ - svg (string) SVG string
+ = (Fragment) the @Fragment
+\*/
+Snap.parse = function (svg) {
+    var f = glob.doc.createDocumentFragment(),
+        full = true,
+        div = glob.doc.createElement("div");
+    svg = Str(svg);
+    if (!svg.match(/^\s*<\s*svg(?:\s|>)/)) {
+        svg = "<svg>" + svg + "</svg>";
+        full = false;
+    }
+    div.innerHTML = svg;
+    svg = div.getElementsByTagName("svg")[0];
+    if (svg) {
+        if (full) {
+            f = svg;
+        } else {
+            while (svg.firstChild) {
+                f.appendChild(svg.firstChild);
+            }
+        }
+    }
+    return new Fragment(f);
+};
+function Fragment(frag) {
+    this.node = frag;
+}
+/*\
+ * Snap.fragment
+ [ method ]
+ **
+ * Creates a DOM fragment from a given list of elements or strings
+ **
+ - varargs (…) SVG string
+ = (Fragment) the @Fragment
+\*/
+Snap.fragment = function () {
+    var args = Array.prototype.slice.call(arguments, 0),
+        f = glob.doc.createDocumentFragment();
+    for (var i = 0, ii = args.length; i < ii; i++) {
+        var item = args[i];
+        if (item.node && item.node.nodeType) {
+            f.appendChild(item.node);
+        }
+        if (item.nodeType) {
+            f.appendChild(item);
+        }
+        if (typeof item == "string") {
+            f.appendChild(Snap.parse(item).node);
+        }
+    }
+    return new Fragment(f);
+};
+
+function make(name, parent) {
+    var res = $(name);
+    parent.appendChild(res);
+    var el = wrap(res);
+    return el;
+}
+function Paper(w, h) {
+    var res,
+        desc,
+        defs,
+        proto = Paper.prototype;
+    if (w && w.tagName == "svg") {
+        if (w.snap in hub) {
+            return hub[w.snap];
+        }
+        var doc = w.ownerDocument;
+        res = new Element(w);
+        desc = w.getElementsByTagName("desc")[0];
+        defs = w.getElementsByTagName("defs")[0];
+        if (!desc) {
+            desc = $("desc");
+            desc.appendChild(doc.createTextNode("Created with Snap"));
+            res.node.appendChild(desc);
+        }
+        if (!defs) {
+            defs = $("defs");
+            res.node.appendChild(defs);
+        }
+        res.defs = defs;
+        for (var key in proto) if (proto[has](key)) {
+            res[key] = proto[key];
+        }
+        res.paper = res.root = res;
+    } else {
+        res = make("svg", glob.doc.body);
+        $(res.node, {
+            height: h,
+            version: 1.1,
+            width: w,
+            xmlns: xmlns
+        });
+    }
+    return res;
+}
+function wrap(dom) {
+    if (!dom) {
+        return dom;
+    }
+    if (dom instanceof Element || dom instanceof Fragment) {
+        return dom;
+    }
+    if (dom.tagName && dom.tagName.toLowerCase() == "svg") {
+        return new Paper(dom);
+    }
+    if (dom.tagName && dom.tagName.toLowerCase() == "object" && dom.type == "image/svg+xml") {
+        return new Paper(dom.contentDocument.getElementsByTagName("svg")[0]);
+    }
+    return new Element(dom);
+}
+
+Snap._.make = make;
+Snap._.wrap = wrap;
+/*\
+ * Paper.el
+ [ method ]
+ **
+ * Creates an element on paper with a given name and no attributes
+ **
+ - name (string) tag name
+ - attr (object) attributes
+ = (Element) the current element
+ > Usage
+ | var c = paper.circle(10, 10, 10); // is the same as...
+ | var c = paper.el("circle").attr({
+ |     cx: 10,
+ |     cy: 10,
+ |     r: 10
+ | });
+ | // and the same as
+ | var c = paper.el("circle", {
+ |     cx: 10,
+ |     cy: 10,
+ |     r: 10
+ | });
+\*/
+Paper.prototype.el = function (name, attr) {
+    var el = make(name, this.node);
+    attr && el.attr(attr);
+    return el;
+};
+/*\
+ * Element.children
+ [ method ]
+ **
+ * Returns array of all the children of the element.
+ = (array) array of Elements
+\*/
+Element.prototype.children = function () {
+    var out = [],
+        ch = this.node.childNodes;
+    for (var i = 0, ii = ch.length; i < ii; i++) {
+        out[i] = Snap(ch[i]);
+    }
+    return out;
+};
+function jsonFiller(root, o) {
+    for (var i = 0, ii = root.length; i < ii; i++) {
+        var item = {
+                type: root[i].type,
+                attr: root[i].attr()
+            },
+            children = root[i].children();
+        o.push(item);
+        if (children.length) {
+            jsonFiller(children, item.childNodes = []);
+        }
+    }
+}
+/*\
+ * Element.toJSON
+ [ method ]
+ **
+ * Returns object representation of the given element and all its children.
+ = (object) in format
+ o {
+ o     type (string) this.type,
+ o     attr (object) attributes map,
+ o     childNodes (array) optional array of children in the same format
+ o }
+\*/
+Element.prototype.toJSON = function () {
+    var out = [];
+    jsonFiller([this], out);
+    return out[0];
+};
+// default
+eve.on("snap.util.getattr", function () {
+    var att = eve.nt();
+    att = att.substring(att.lastIndexOf(".") + 1);
+    var css = att.replace(/[A-Z]/g, function (letter) {
+        return "-" + letter.toLowerCase();
+    });
+    if (cssAttr[has](css)) {
+        return this.node.ownerDocument.defaultView.getComputedStyle(this.node, null).getPropertyValue(css);
+    } else {
+        return $(this.node, att);
+    }
+});
+var cssAttr = {
+    "alignment-baseline": 0,
+    "baseline-shift": 0,
+    "clip": 0,
+    "clip-path": 0,
+    "clip-rule": 0,
+    "color": 0,
+    "color-interpolation": 0,
+    "color-interpolation-filters": 0,
+    "color-profile": 0,
+    "color-rendering": 0,
+    "cursor": 0,
+    "direction": 0,
+    "display": 0,
+    "dominant-baseline": 0,
+    "enable-background": 0,
+    "fill": 0,
+    "fill-opacity": 0,
+    "fill-rule": 0,
+    "filter": 0,
+    "flood-color": 0,
+    "flood-opacity": 0,
+    "font": 0,
+    "font-family": 0,
+    "font-size": 0,
+    "font-size-adjust": 0,
+    "font-stretch": 0,
+    "font-style": 0,
+    "font-variant": 0,
+    "font-weight": 0,
+    "glyph-orientation-horizontal": 0,
+    "glyph-orientation-vertical": 0,
+    "image-rendering": 0,
+    "kerning": 0,
+    "letter-spacing": 0,
+    "lighting-color": 0,
+    "marker": 0,
+    "marker-end": 0,
+    "marker-mid": 0,
+    "marker-start": 0,
+    "mask": 0,
+    "opacity": 0,
+    "overflow": 0,
+    "pointer-events": 0,
+    "shape-rendering": 0,
+    "stop-color": 0,
+    "stop-opacity": 0,
+    "stroke": 0,
+    "stroke-dasharray": 0,
+    "stroke-dashoffset": 0,
+    "stroke-linecap": 0,
+    "stroke-linejoin": 0,
+    "stroke-miterlimit": 0,
+    "stroke-opacity": 0,
+    "stroke-width": 0,
+    "text-anchor": 0,
+    "text-decoration": 0,
+    "text-rendering": 0,
+    "unicode-bidi": 0,
+    "visibility": 0,
+    "word-spacing": 0,
+    "writing-mode": 0
+};
+
+eve.on("snap.util.attr", function (value) {
+    var att = eve.nt(),
+        attr = {};
+    att = att.substring(att.lastIndexOf(".") + 1);
+    attr[att] = value;
+    var style = att.replace(/-(\w)/gi, function (all, letter) {
+            return letter.toUpperCase();
+        }),
+        css = att.replace(/[A-Z]/g, function (letter) {
+            return "-" + letter.toLowerCase();
+        });
+    if (cssAttr[has](css)) {
+        this.node.style[style] = value == null ? E : value;
+    } else {
+        $(this.node, attr);
+    }
+});
+(function (proto) {}(Paper.prototype));
+
+// simple ajax
+/*\
+ * Snap.ajax
+ [ method ]
+ **
+ * Simple implementation of Ajax
+ **
+ - url (string) URL
+ - postData (object|string) data for post request
+ - callback (function) callback
+ - scope (object) #optional scope of callback
+ * or
+ - url (string) URL
+ - callback (function) callback
+ - scope (object) #optional scope of callback
+ = (XMLHttpRequest) the XMLHttpRequest object, just in case
+\*/
+Snap.ajax = function (url, postData, callback, scope){
+    var req = new XMLHttpRequest,
+        id = ID();
+    if (req) {
+        if (is(postData, "function")) {
+            scope = callback;
+            callback = postData;
+            postData = null;
+        } else if (is(postData, "object")) {
+            var pd = [];
+            for (var key in postData) if (postData.hasOwnProperty(key)) {
+                pd.push(encodeURIComponent(key) + "=" + encodeURIComponent(postData[key]));
+            }
+            postData = pd.join("&");
+        }
+        req.open((postData ? "POST" : "GET"), url, true);
+        if (postData) {
+            req.setRequestHeader("X-Requested-With", "XMLHttpRequest");
+            req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
+        }
+        if (callback) {
+            eve.once("snap.ajax." + id + ".0", callback);
+            eve.once("snap.ajax." + id + ".200", callback);
+            eve.once("snap.ajax." + id + ".304", callback);
+        }
+        req.onreadystatechange = function() {
+            if (req.readyState != 4) return;
+            eve("snap.ajax." + id + "." + req.status, scope, req);
+        };
+        if (req.readyState == 4) {
+            return req;
+        }
+        req.send(postData);
+        return req;
+    }
+};
+/*\
+ * Snap.load
+ [ method ]
+ **
+ * Loads external SVG file as a @Fragment (see @Snap.ajax for more advanced AJAX)
+ **
+ - url (string) URL
+ - callback (function) callback
+ - scope (object) #optional scope of callback
+\*/
+Snap.load = function (url, callback, scope) {
+    Snap.ajax(url, function (req) {
+        var f = Snap.parse(req.responseText);
+        scope ? callback.call(scope, f) : callback(f);
+    });
+};
+var getOffset = function (elem) {
+    var box = elem.getBoundingClientRect(),
+        doc = elem.ownerDocument,
+        body = doc.body,
+        docElem = doc.documentElement,
+        clientTop = docElem.clientTop || body.clientTop || 0, clientLeft = docElem.clientLeft || body.clientLeft || 0,
+        top  = box.top  + (g.win.pageYOffset || docElem.scrollTop || body.scrollTop ) - clientTop,
+        left = box.left + (g.win.pageXOffset || docElem.scrollLeft || body.scrollLeft) - clientLeft;
+    return {
+        y: top,
+        x: left
+    };
+};
+/*\
+ * Snap.getElementByPoint
+ [ method ]
+ **
+ * Returns you topmost element under given point.
+ **
+ = (object) Snap element object
+ - x (number) x coordinate from the top left corner of the window
+ - y (number) y coordinate from the top left corner of the window
+ > Usage
+ | Snap.getElementByPoint(mouseX, mouseY).attr({stroke: "#f00"});
+\*/
+Snap.getElementByPoint = function (x, y) {
+    var paper = this,
+        svg = paper.canvas,
+        target = glob.doc.elementFromPoint(x, y);
+    if (glob.win.opera && target.tagName == "svg") {
+        var so = getOffset(target),
+            sr = target.createSVGRect();
+        sr.x = x - so.x;
+        sr.y = y - so.y;
+        sr.width = sr.height = 1;
+        var hits = target.getIntersectionList(sr, null);
+        if (hits.length) {
+            target = hits[hits.length - 1];
+        }
+    }
+    if (!target) {
+        return null;
+    }
+    return wrap(target);
+};
+/*\
+ * Snap.plugin
+ [ method ]
+ **
+ * Let you write plugins. You pass in a function with five arguments, like this:
+ | Snap.plugin(function (Snap, Element, Paper, global, Fragment) {
+ |     Snap.newmethod = function () {};
+ |     Element.prototype.newmethod = function () {};
+ |     Paper.prototype.newmethod = function () {};
+ | });
+ * Inside the function you have access to all main objects (and their
+ * prototypes). This allow you to extend anything you want.
+ **
+ - f (function) your plugin body
+\*/
+Snap.plugin = function (f) {
+    f(Snap, Element, Paper, glob, Fragment);
+};
+glob.win.Snap = Snap;
+return Snap;
+}(window || this));
+
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
+    var elproto = Element.prototype,
+        is = Snap.is,
+        Str = String,
+        unit2px = Snap._unit2px,
+        $ = Snap._.$,
+        make = Snap._.make,
+        getSomeDefs = Snap._.getSomeDefs,
+        has = "hasOwnProperty",
+        wrap = Snap._.wrap;
+    /*\
+     * Element.getBBox
+     [ method ]
+     **
+     * Returns the bounding box descriptor for the given element
+     **
+     = (object) bounding box descriptor:
+     o {
+     o     cx: (number) x of the center,
+     o     cy: (number) x of the center,
+     o     h: (number) height,
+     o     height: (number) height,
+     o     path: (string) path command for the box,
+     o     r0: (number) radius of a circle that fully encloses the box,
+     o     r1: (number) radius of the smallest circle that can be enclosed,
+     o     r2: (number) radius of the largest circle that can be enclosed,
+     o     vb: (string) box as a viewbox command,
+     o     w: (number) width,
+     o     width: (number) width,
+     o     x2: (number) x of the right side,
+     o     x: (number) x of the left side,
+     o     y2: (number) y of the bottom edge,
+     o     y: (number) y of the top edge
+     o }
+    \*/
+    elproto.getBBox = function (isWithoutTransform) {
+        if (!Snap.Matrix || !Snap.path) {
+            return this.node.getBBox();
+        }
+        var el = this,
+            m = new Snap.Matrix;
+        if (el.removed) {
+            return Snap._.box();
+        }
+        while (el.type == "use") {
+            if (!isWithoutTransform) {
+                m = m.add(el.transform().localMatrix.translate(el.attr("x") || 0, el.attr("y") || 0));
+            }
+            if (el.original) {
+                el = el.original;
+            } else {
+                var href = el.attr("xlink:href");
+                el = el.original = el.node.ownerDocument.getElementById(href.substring(href.indexOf("#") + 1));
+            }
+        }
+        var _ = el._,
+            pathfinder = Snap.path.get[el.type] || Snap.path.get.deflt;
+        try {
+            if (isWithoutTransform) {
+                _.bboxwt = pathfinder ? Snap.path.getBBox(el.realPath = pathfinder(el)) : Snap._.box(el.node.getBBox());
+                return Snap._.box(_.bboxwt);
+            } else {
+                el.realPath = pathfinder(el);
+                el.matrix = el.transform().localMatrix;
+                _.bbox = Snap.path.getBBox(Snap.path.map(el.realPath, m.add(el.matrix)));
+                return Snap._.box(_.bbox);
+            }
+        } catch (e) {
+            // Firefox doesn’t give you bbox of hidden element
+            return Snap._.box();
+        }
+    };
+    var propString = function () {
+        return this.string;
+    };
+    function extractTransform(el, tstr) {
+        if (tstr == null) {
+            var doReturn = true;
+            if (el.type == "linearGradient" || el.type == "radialGradient") {
+                tstr = el.node.getAttribute("gradientTransform");
+            } else if (el.type == "pattern") {
+                tstr = el.node.getAttribute("patternTransform");
+            } else {
+                tstr = el.node.getAttribute("transform");
+            }
+            if (!tstr) {
+                return new Snap.Matrix;
+            }
+            tstr = Snap._.svgTransform2string(tstr);
+        } else {
+            if (!Snap._.rgTransform.test(tstr)) {
+                tstr = Snap._.svgTransform2string(tstr);
+            } else {
+                tstr = Str(tstr).replace(/\.{3}|\u2026/g, el._.transform || "");
+            }
+            if (is(tstr, "array")) {
+                tstr = Snap.path ? Snap.path.toString.call(tstr) : Str(tstr);
+            }
+            el._.transform = tstr;
+        }
+        var m = Snap._.transform2matrix(tstr, el.getBBox(1));
+        if (doReturn) {
+            return m;
+        } else {
+            el.matrix = m;
+        }
+    }
+    /*\
+     * Element.transform
+     [ method ]
+     **
+     * Gets or sets transformation of the element
+     **
+     - tstr (string) transform string in Snap or SVG format
+     = (Element) the current element
+     * or
+     = (object) transformation descriptor:
+     o {
+     o     string (string) transform string,
+     o     globalMatrix (Matrix) matrix of all transformations applied to element or its parents,
+     o     localMatrix (Matrix) matrix of transformations applied only to the element,
+     o     diffMatrix (Matrix) matrix of difference between global and local transformations,
+     o     global (string) global transformation as string,
+     o     local (string) local transformation as string,
+     o     toString (function) returns `string` property
+     o }
+    \*/
+    elproto.transform = function (tstr) {
+        var _ = this._;
+        if (tstr == null) {
+            var papa = this,
+                global = new Snap.Matrix(this.node.getCTM()),
+                local = extractTransform(this),
+                ms = [local],
+                m = new Snap.Matrix,
+                i,
+                localString = local.toTransformString(),
+                string = Str(local) == Str(this.matrix) ?
+                            Str(_.transform) : localString;
+            while (papa.type != "svg" && (papa = papa.parent())) {
+                ms.push(extractTransform(papa));
+            }
+            i = ms.length;
+            while (i--) {
+                m.add(ms[i]);
+            }
+            return {
+                string: string,
+                globalMatrix: global,
+                totalMatrix: m,
+                localMatrix: local,
+                diffMatrix: global.clone().add(local.invert()),
+                global: global.toTransformString(),
+                total: m.toTransformString(),
+                local: localString,
+                toString: propString
+            };
+        }
+        if (tstr instanceof Snap.Matrix) {
+            this.matrix = tstr;
+            this._.transform = tstr.toTransformString();
+        } else {
+            extractTransform(this, tstr);
+        }
+
+        if (this.node) {
+            if (this.type == "linearGradient" || this.type == "radialGradient") {
+                $(this.node, {gradientTransform: this.matrix});
+            } else if (this.type == "pattern") {
+                $(this.node, {patternTransform: this.matrix});
+            } else {
+                $(this.node, {transform: this.matrix});
+            }
+        }
+
+        return this;
+    };
+    /*\
+     * Element.parent
+     [ method ]
+     **
+     * Returns the element's parent
+     **
+     = (Element) the parent element
+    \*/
+    elproto.parent = function () {
+        return wrap(this.node.parentNode);
+    };
+    /*\
+     * Element.append
+     [ method ]
+     **
+     * Appends the given element to current one
+     **
+     - el (Element|Set) element to append
+     = (Element) the parent element
+    \*/
+    /*\
+     * Element.add
+     [ method ]
+     **
+     * See @Element.append
+    \*/
+    elproto.append = elproto.add = function (el) {
+        if (el) {
+            if (el.type == "set") {
+                var it = this;
+                el.forEach(function (el) {
+                    it.add(el);
+                });
+                return this;
+            }
+            el = wrap(el);
+            this.node.appendChild(el.node);
+            el.paper = this.paper;
+        }
+        return this;
+    };
+    /*\
+     * Element.appendTo
+     [ method ]
+     **
+     * Appends the current element to the given one
+     **
+     - el (Element) parent element to append to
+     = (Element) the child element
+    \*/
+    elproto.appendTo = function (el) {
+        if (el) {
+            el = wrap(el);
+            el.append(this);
+        }
+        return this;
+    };
+    /*\
+     * Element.prepend
+     [ method ]
+     **
+     * Prepends the given element to the current one
+     **
+     - el (Element) element to prepend
+     = (Element) the parent element
+    \*/
+    elproto.prepend = function (el) {
+        if (el) {
+            if (el.type == "set") {
+                var it = this,
+                    first;
+                el.forEach(function (el) {
+                    if (first) {
+                        first.after(el);
+                    } else {
+                        it.prepend(el);
+                    }
+                    first = el;
+                });
+                return this;
+            }
+            el = wrap(el);
+            var parent = el.parent();
+            this.node.insertBefore(el.node, this.node.firstChild);
+            this.add && this.add();
+            el.paper = this.paper;
+            this.parent() && this.parent().add();
+            parent && parent.add();
+        }
+        return this;
+    };
+    /*\
+     * Element.prependTo
+     [ method ]
+     **
+     * Prepends the current element to the given one
+     **
+     - el (Element) parent element to prepend to
+     = (Element) the child element
+    \*/
+    elproto.prependTo = function (el) {
+        el = wrap(el);
+        el.prepend(this);
+        return this;
+    };
+    /*\
+     * Element.before
+     [ method ]
+     **
+     * Inserts given element before the current one
+     **
+     - el (Element) element to insert
+     = (Element) the parent element
+    \*/
+    elproto.before = function (el) {
+        if (el.type == "set") {
+            var it = this;
+            el.forEach(function (el) {
+                var parent = el.parent();
+                it.node.parentNode.insertBefore(el.node, it.node);
+                parent && parent.add();
+            });
+            this.parent().add();
+            return this;
+        }
+        el = wrap(el);
+        var parent = el.parent();
+        this.node.parentNode.insertBefore(el.node, this.node);
+        this.parent() && this.parent().add();
+        parent && parent.add();
+        el.paper = this.paper;
+        return this;
+    };
+    /*\
+     * Element.after
+     [ method ]
+     **
+     * Inserts given element after the current one
+     **
+     - el (Element) element to insert
+     = (Element) the parent element
+    \*/
+    elproto.after = function (el) {
+        el = wrap(el);
+        var parent = el.parent();
+        if (this.node.nextSibling) {
+            this.node.parentNode.insertBefore(el.node, this.node.nextSibling);
+        } else {
+            this.node.parentNode.appendChild(el.node);
+        }
+        this.parent() && this.parent().add();
+        parent && parent.add();
+        el.paper = this.paper;
+        return this;
+    };
+    /*\
+     * Element.insertBefore
+     [ method ]
+     **
+     * Inserts the element after the given one
+     **
+     - el (Element) element next to whom insert to
+     = (Element) the parent element
+    \*/
+    elproto.insertBefore = function (el) {
+        el = wrap(el);
+        var parent = this.parent();
+        el.node.parentNode.insertBefore(this.node, el.node);
+        this.paper = el.paper;
+        parent && parent.add();
+        el.parent() && el.parent().add();
+        return this;
+    };
+    /*\
+     * Element.insertAfter
+     [ method ]
+     **
+     * Inserts the element after the given one
+     **
+     - el (Element) element next to whom insert to
+     = (Element) the parent element
+    \*/
+    elproto.insertAfter = function (el) {
+        el = wrap(el);
+        var parent = this.parent();
+        el.node.parentNode.insertBefore(this.node, el.node.nextSibling);
+        this.paper = el.paper;
+        parent && parent.add();
+        el.parent() && el.parent().add();
+        return this;
+    };
+    /*\
+     * Element.remove
+     [ method ]
+     **
+     * Removes element from the DOM
+     = (Element) the detached element
+    \*/
+    elproto.remove = function () {
+        var parent = this.parent();
+        this.node.parentNode && this.node.parentNode.removeChild(this.node);
+        delete this.paper;
+        this.removed = true;
+        parent && parent.add();
+        return this;
+    };
+    /*\
+     * Element.select
+     [ method ]
+     **
+     * Gathers the nested @Element matching the given set of CSS selectors
+     **
+     - query (string) CSS selector
+     = (Element) result of query selection
+    \*/
+    elproto.select = function (query) {
+        return wrap(this.node.querySelector(query));
+    };
+    /*\
+     * Element.selectAll
+     [ method ]
+     **
+     * Gathers nested @Element objects matching the given set of CSS selectors
+     **
+     - query (string) CSS selector
+     = (Set|array) result of query selection
+    \*/
+    elproto.selectAll = function (query) {
+        var nodelist = this.node.querySelectorAll(query),
+            set = (Snap.set || Array)();
+        for (var i = 0; i < nodelist.length; i++) {
+            set.push(wrap(nodelist[i]));
+        }
+        return set;
+    };
+    /*\
+     * Element.asPX
+     [ method ]
+     **
+     * Returns given attribute of the element as a `px` value (not %, em, etc.)
+     **
+     - attr (string) attribute name
+     - value (string) #optional attribute value
+     = (Element) result of query selection
+    \*/
+    elproto.asPX = function (attr, value) {
+        if (value == null) {
+            value = this.attr(attr);
+        }
+        return +unit2px(this, attr, value);
+    };
+    // SIERRA Element.use(): I suggest adding a note about how to access the original element the returned <use> instantiates. It's a part of SVG with which ordinary web developers may be least familiar.
+    /*\
+     * Element.use
+     [ method ]
+     **
+     * Creates a `<use>` element linked to the current element
+     **
+     = (Element) the `<use>` element
+    \*/
+    elproto.use = function () {
+        var use,
+            id = this.node.id;
+        if (!id) {
+            id = this.id;
+            $(this.node, {
+                id: id
+            });
+        }
+        if (this.type == "linearGradient" || this.type == "radialGradient" ||
+            this.type == "pattern") {
+            use = make(this.type, this.node.parentNode);
+        } else {
+            use = make("use", this.node.parentNode);
+        }
+        $(use.node, {
+            "xlink:href": "#" + id
+        });
+        use.original = this;
+        return use;
+    };
+    function fixids(el) {
+        var els = el.selectAll("*"),
+            it,
+            url = /^\s*url\(("|'|)(.*)\1\)\s*$/,
+            ids = [],
+            uses = {};
+        function urltest(it, name) {
+            var val = $(it.node, name);
+            val = val && val.match(url);
+            val = val && val[2];
+            if (val && val.charAt() == "#") {
+                val = val.substring(1);
+            } else {
+                return;
+            }
+            if (val) {
+                uses[val] = (uses[val] || []).concat(function (id) {
+                    var attr = {};
+                    attr[name] = URL(id);
+                    $(it.node, attr);
+                });
+            }
+        }
+        function linktest(it) {
+            var val = $(it.node, "xlink:href");
+            if (val && val.charAt() == "#") {
+                val = val.substring(1);
+            } else {
+                return;
+            }
+            if (val) {
+                uses[val] = (uses[val] || []).concat(function (id) {
+                    it.attr("xlink:href", "#" + id);
+                });
+            }
+        }
+        for (var i = 0, ii = els.length; i < ii; i++) {
+            it = els[i];
+            urltest(it, "fill");
+            urltest(it, "stroke");
+            urltest(it, "filter");
+            urltest(it, "mask");
+            urltest(it, "clip-path");
+            linktest(it);
+            var oldid = $(it.node, "id");
+            if (oldid) {
+                $(it.node, {id: it.id});
+                ids.push({
+                    old: oldid,
+                    id: it.id
+                });
+            }
+        }
+        for (i = 0, ii = ids.length; i < ii; i++) {
+            var fs = uses[ids[i].old];
+            if (fs) {
+                for (var j = 0, jj = fs.length; j < jj; j++) {
+                    fs[j](ids[i].id);
+                }
+            }
+        }
+    }
+    /*\
+     * Element.clone
+     [ method ]
+     **
+     * Creates a clone of the element and inserts it after the element
+     **
+     = (Element) the clone
+    \*/
+    elproto.clone = function () {
+        var clone = wrap(this.node.cloneNode(true));
+        if ($(clone.node, "id")) {
+            $(clone.node, {id: clone.id});
+        }
+        fixids(clone);
+        clone.insertAfter(this);
+        return clone;
+    };
+    /*\
+     * Element.toDefs
+     [ method ]
+     **
+     * Moves element to the shared `<defs>` area
+     **
+     = (Element) the element
+    \*/
+    elproto.toDefs = function () {
+        var defs = getSomeDefs(this);
+        defs.appendChild(this.node);
+        return this;
+    };
+    /*\
+     * Element.toPattern
+     [ method ]
+     **
+     * Creates a `<pattern>` element from the current element
+     **
+     * To create a pattern you have to specify the pattern rect:
+     - x (string|number)
+     - y (string|number)
+     - width (string|number)
+     - height (string|number)
+     = (Element) the `<pattern>` element
+     * You can use pattern later on as an argument for `fill` attribute:
+     | var p = paper.path("M10-5-10,15M15,0,0,15M0-5-20,15").attr({
+     |         fill: "none",
+     |         stroke: "#bada55",
+     |         strokeWidth: 5
+     |     }).pattern(0, 0, 10, 10),
+     |     c = paper.circle(200, 200, 100);
+     | c.attr({
+     |     fill: p
+     | });
+    \*/
+    elproto.pattern = elproto.toPattern = function (x, y, width, height) {
+        var p = make("pattern", getSomeDefs(this));
+        if (x == null) {
+            x = this.getBBox();
+        }
+        if (is(x, "object") && "x" in x) {
+            y = x.y;
+            width = x.width;
+            height = x.height;
+            x = x.x;
+        }
+        $(p.node, {
+            x: x,
+            y: y,
+            width: width,
+            height: height,
+            patternUnits: "userSpaceOnUse",
+            id: p.id,
+            viewBox: [x, y, width, height].join(" ")
+        });
+        p.node.appendChild(this.node);
+        return p;
+    };
+// SIERRA Element.marker(): clarify what a reference point is. E.g., helps you offset the object from its edge such as when centering it over a path.
+// SIERRA Element.marker(): I suggest the method should accept default reference point values.  Perhaps centered with (refX = width/2) and (refY = height/2)? Also, couldn't it assume the element's current _width_ and _height_? And please specify what _x_ and _y_ mean: offsets? If so, from where?  Couldn't they also be assigned default values?
+    /*\
+     * Element.marker
+     [ method ]
+     **
+     * Creates a `<marker>` element from the current element
+     **
+     * To create a marker you have to specify the bounding rect and reference point:
+     - x (number)
+     - y (number)
+     - width (number)
+     - height (number)
+     - refX (number)
+     - refY (number)
+     = (Element) the `<marker>` element
+     * You can specify the marker later as an argument for `marker-start`, `marker-end`, `marker-mid`, and `marker` attributes. The `marker` attribute places the marker at every point along the path, and `marker-mid` places them at every point except the start and end.
+    \*/
+    // TODO add usage for markers
+    elproto.marker = function (x, y, width, height, refX, refY) {
+        var p = make("marker", getSomeDefs(this));
+        if (x == null) {
+            x = this.getBBox();
+        }
+        if (is(x, "object") && "x" in x) {
+            y = x.y;
+            width = x.width;
+            height = x.height;
+            refX = x.refX || x.cx;
+            refY = x.refY || x.cy;
+            x = x.x;
+        }
+        $(p.node, {
+            viewBox: [x, y, width, height].join(" "),
+            markerWidth: width,
+            markerHeight: height,
+            orient: "auto",
+            refX: refX || 0,
+            refY: refY || 0,
+            id: p.id
+        });
+        p.node.appendChild(this.node);
+        return p;
+    };
+    // animation
+    function slice(from, to, f) {
+        return function (arr) {
+            var res = arr.slice(from, to);
+            if (res.length == 1) {
+                res = res[0];
+            }
+            return f ? f(res) : res;
+        };
+    }
+    var Animation = function (attr, ms, easing, callback) {
+        if (typeof easing == "function" && !easing.length) {
+            callback = easing;
+            easing = mina.linear;
+        }
+        this.attr = attr;
+        this.dur = ms;
+        easing && (this.easing = easing);
+        callback && (this.callback = callback);
+    };
+    Snap._.Animation = Animation;
+    /*\
+     * Snap.animation
+     [ method ]
+     **
+     * Creates an animation object
+     **
+     - attr (object) attributes of final destination
+     - duration (number) duration of the animation, in milliseconds
+     - easing (function) #optional one of easing functions of @mina or custom one
+     - callback (function) #optional callback function that fires when animation ends
+     = (object) animation object
+    \*/
+    Snap.animation = function (attr, ms, easing, callback) {
+        return new Animation(attr, ms, easing, callback);
+    };
+    /*\
+     * Element.inAnim
+     [ method ]
+     **
+     * Returns a set of animations that may be able to manipulate the current element
+     **
+     = (object) in format:
+     o {
+     o     anim (object) animation object,
+     o     mina (object) @mina object,
+     o     curStatus (number) 0..1 — status of the animation: 0 — just started, 1 — just finished,
+     o     status (function) gets or sets the status of the animation,
+     o     stop (function) stops the animation
+     o }
+    \*/
+    elproto.inAnim = function () {
+        var el = this,
+            res = [];
+        for (var id in el.anims) if (el.anims[has](id)) {
+            (function (a) {
+                res.push({
+                    anim: new Animation(a._attrs, a.dur, a.easing, a._callback),
+                    mina: a,
+                    curStatus: a.status(),
+                    status: function (val) {
+                        return a.status(val);
+                    },
+                    stop: function () {
+                        a.stop();
+                    }
+                });
+            }(el.anims[id]));
+        }
+        return res;
+    };
+    /*\
+     * Snap.animate
+     [ method ]
+     **
+     * Runs generic animation of one number into another with a caring function
+     **
+     - from (number|array) number or array of numbers
+     - to (number|array) number or array of numbers
+     - setter (function) caring function that accepts one number argument
+     - duration (number) duration, in milliseconds
+     - easing (function) #optional easing function from @mina or custom
+     - callback (function) #optional callback function to execute when animation ends
+     = (object) animation object in @mina format
+     o {
+     o     id (string) animation id, consider it read-only,
+     o     duration (function) gets or sets the duration of the animation,
+     o     easing (function) easing,
+     o     speed (function) gets or sets the speed of the animation,
+     o     status (function) gets or sets the status of the animation,
+     o     stop (function) stops the animation
+     o }
+     | var rect = Snap().rect(0, 0, 10, 10);
+     | Snap.animate(0, 10, function (val) {
+     |     rect.attr({
+     |         x: val
+     |     });
+     | }, 1000);
+     | // in given context is equivalent to
+     | rect.animate({x: 10}, 1000);
+    \*/
+    Snap.animate = function (from, to, setter, ms, easing, callback) {
+        if (typeof easing == "function" && !easing.length) {
+            callback = easing;
+            easing = mina.linear;
+        }
+        var now = mina.time(),
+            anim = mina(from, to, now, now + ms, mina.time, setter, easing);
+        callback && eve.once("mina.finish." + anim.id, callback);
+        return anim;
+    };
+    /*\
+     * Element.stop
+     [ method ]
+     **
+     * Stops all the animations for the current element
+     **
+     = (Element) the current element
+    \*/
+    elproto.stop = function () {
+        var anims = this.inAnim();
+        for (var i = 0, ii = anims.length; i < ii; i++) {
+            anims[i].stop();
+        }
+        return this;
+    };
+    /*\
+     * Element.animate
+     [ method ]
+     **
+     * Animates the given attributes of the element
+     **
+     - attrs (object) key-value pairs of destination attributes
+     - duration (number) duration of the animation in milliseconds
+     - easing (function) #optional easing function from @mina or custom
+     - callback (function) #optional callback function that executes when the animation ends
+     = (Element) the current element
+    \*/
+    elproto.animate = function (attrs, ms, easing, callback) {
+        if (typeof easing == "function" && !easing.length) {
+            callback = easing;
+            easing = mina.linear;
+        }
+        if (attrs instanceof Animation) {
+            callback = attrs.callback;
+            easing = attrs.easing;
+            ms = attrs.dur;
+            attrs = attrs.attr;
+        }
+        var fkeys = [], tkeys = [], keys = {}, from, to, f, eq,
+            el = this;
+        for (var key in attrs) if (attrs[has](key)) {
+            if (el.equal) {
+                eq = el.equal(key, Str(attrs[key]));
+                from = eq.from;
+                to = eq.to;
+                f = eq.f;
+            } else {
+                from = +el.attr(key);
+                to = +attrs[key];
+            }
+            var len = is(from, "array") ? from.length : 1;
+            keys[key] = slice(fkeys.length, fkeys.length + len, f);
+            fkeys = fkeys.concat(from);
+            tkeys = tkeys.concat(to);
+        }
+        var now = mina.time(),
+            anim = mina(fkeys, tkeys, now, now + ms, mina.time, function (val) {
+                var attr = {};
+                for (var key in keys) if (keys[has](key)) {
+                    attr[key] = keys[key](val);
+                }
+                el.attr(attr);
+            }, easing);
+        el.anims[anim.id] = anim;
+        anim._attrs = attrs;
+        anim._callback = callback;
+        eve("snap.animcreated." + el.id, anim);
+        eve.once("mina.finish." + anim.id, function () {
+            delete el.anims[anim.id];
+            callback && callback.call(el);
+        });
+        eve.once("mina.stop." + anim.id, function () {
+            delete el.anims[anim.id];
+        });
+        return el;
+    };
+    var eldata = {};
+    /*\
+     * Element.data
+     [ method ]
+     **
+     * Adds or retrieves given value associated with given key. (Don’t confuse
+     * with `data-` attributes)
+     *
+     * See also @Element.removeData
+     - key (string) key to store data
+     - value (any) #optional value to store
+     = (object) @Element
+     * or, if value is not specified:
+     = (any) value
+     > Usage
+     | for (var i = 0, i < 5, i++) {
+     |     paper.circle(10 + 15 * i, 10, 10)
+     |          .attr({fill: "#000"})
+     |          .data("i", i)
+     |          .click(function () {
+     |             alert(this.data("i"));
+     |          });
+     | }
+    \*/
+    elproto.data = function (key, value) {
+        var data = eldata[this.id] = eldata[this.id] || {};
+        if (arguments.length == 0){
+            eve("snap.data.get." + this.id, this, data, null);
+            return data;
+        }
+        if (arguments.length == 1) {
+            if (Snap.is(key, "object")) {
+                for (var i in key) if (key[has](i)) {
+                    this.data(i, key[i]);
+                }
+                return this;
+            }
+            eve("snap.data.get." + this.id, this, data[key], key);
+            return data[key];
+        }
+        data[key] = value;
+        eve("snap.data.set." + this.id, this, value, key);
+        return this;
+    };
+    /*\
+     * Element.removeData
+     [ method ]
+     **
+     * Removes value associated with an element by given key.
+     * If key is not provided, removes all the data of the element.
+     - key (string) #optional key
+     = (object) @Element
+    \*/
+    elproto.removeData = function (key) {
+        if (key == null) {
+            eldata[this.id] = {};
+        } else {
+            eldata[this.id] && delete eldata[this.id][key];
+        }
+        return this;
+    };
+    /*\
+     * Element.outerSVG
+     [ method ]
+     **
+     * Returns SVG code for the element, equivalent to HTML's `outerHTML`.
+     *
+     * See also @Element.innerSVG
+     = (string) SVG code for the element
+    \*/
+    /*\
+     * Element.toString
+     [ method ]
+     **
+     * See @Element.outerSVG
+    \*/
+    elproto.outerSVG = elproto.toString = toString(1);
+    /*\
+     * Element.innerSVG
+     [ method ]
+     **
+     * Returns SVG code for the element's contents, equivalent to HTML's `innerHTML`
+     = (string) SVG code for the element
+    \*/
+    elproto.innerSVG = toString();
+    function toString(type) {
+        return function () {
+            var res = type ? "<" + this.type : "",
+                attr = this.node.attributes,
+                chld = this.node.childNodes;
+            if (type) {
+                for (var i = 0, ii = attr.length; i < ii; i++) {
+                    res += " " + attr[i].name + '="' +
+                            attr[i].value.replace(/"/g, '\\"') + '"';
+                }
+            }
+            if (chld.length) {
+                type && (res += ">");
+                for (i = 0, ii = chld.length; i < ii; i++) {
+                    if (chld[i].nodeType == 3) {
+                        res += chld[i].nodeValue;
+                    } else if (chld[i].nodeType == 1) {
+                        res += wrap(chld[i]).toString();
+                    }
+                }
+                type && (res += "</" + this.type + ">");
+            } else {
+                type && (res += "/>");
+            }
+            return res;
+        };
+    }
+    elproto.toDataURL = function () {
+        if (window && window.btoa) {
+            var bb = this.getBBox(),
+                svg = Snap.format('<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="{width}" height="{height}" viewBox="{x} {y} {width} {height}">{contents}</svg>', {
+                x: +bb.x.toFixed(3),
+                y: +bb.y.toFixed(3),
+                width: +bb.width.toFixed(3),
+                height: +bb.height.toFixed(3),
+                contents: this.outerSVG()
+            });
+            return "data:image/svg+xml;base64," + btoa(unescape(encodeURIComponent(svg)));
+        }
+    };
+    /*\
+     * Fragment.select
+     [ method ]
+     **
+     * See @Element.select
+    \*/
+    Fragment.prototype.select = elproto.select;
+    /*\
+     * Fragment.selectAll
+     [ method ]
+     **
+     * See @Element.selectAll
+    \*/
+    Fragment.prototype.selectAll = elproto.selectAll;
+});
+
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
+    var objectToString = Object.prototype.toString,
+        Str = String,
+        math = Math,
+        E = "";
+    function Matrix(a, b, c, d, e, f) {
+        if (b == null && objectToString.call(a) == "[object SVGMatrix]") {
+            this.a = a.a;
+            this.b = a.b;
+            this.c = a.c;
+            this.d = a.d;
+            this.e = a.e;
+            this.f = a.f;
+            return;
+        }
+        if (a != null) {
+            this.a = +a;
+            this.b = +b;
+            this.c = +c;
+            this.d = +d;
+            this.e = +e;
+            this.f = +f;
+        } else {
+            this.a = 1;
+            this.b = 0;
+            this.c = 0;
+            this.d = 1;
+            this.e = 0;
+            this.f = 0;
+        }
+    }
+    (function (matrixproto) {
+        /*\
+         * Matrix.add
+         [ method ]
+         **
+         * Adds the given matrix to existing one
+         - a (number)
+         - b (number)
+         - c (number)
+         - d (number)
+         - e (number)
+         - f (number)
+         * or
+         - matrix (object) @Matrix
+        \*/
+        matrixproto.add = function (a, b, c, d, e, f) {
+            var out = [[], [], []],
+                m = [[this.a, this.c, this.e], [this.b, this.d, this.f], [0, 0, 1]],
+                matrix = [[a, c, e], [b, d, f], [0, 0, 1]],
+                x, y, z, res;
+
+            if (a && a instanceof Matrix) {
+                matrix = [[a.a, a.c, a.e], [a.b, a.d, a.f], [0, 0, 1]];
+            }
+
+            for (x = 0; x < 3; x++) {
+                for (y = 0; y < 3; y++) {
+                    res = 0;
+                    for (z = 0; z < 3; z++) {
+                        res += m[x][z] * matrix[z][y];
+                    }
+                    out[x][y] = res;
+                }
+            }
+            this.a = out[0][0];
+            this.b = out[1][0];
+            this.c = out[0][1];
+            this.d = out[1][1];
+            this.e = out[0][2];
+            this.f = out[1][2];
+            return this;
+        };
+        /*\
+         * Matrix.invert
+         [ method ]
+         **
+         * Returns an inverted version of the matrix
+         = (object) @Matrix
+        \*/
+        matrixproto.invert = function () {
+            var me = this,
+                x = me.a * me.d - me.b * me.c;
+            return new Matrix(me.d / x, -me.b / x, -me.c / x, me.a / x, (me.c * me.f - me.d * me.e) / x, (me.b * me.e - me.a * me.f) / x);
+        };
+        /*\
+         * Matrix.clone
+         [ method ]
+         **
+         * Returns a copy of the matrix
+         = (object) @Matrix
+        \*/
+        matrixproto.clone = function () {
+            return new Matrix(this.a, this.b, this.c, this.d, this.e, this.f);
+        };
+        /*\
+         * Matrix.translate
+         [ method ]
+         **
+         * Translate the matrix
+         - x (number) horizontal offset distance
+         - y (number) vertical offset distance
+        \*/
+        matrixproto.translate = function (x, y) {
+            return this.add(1, 0, 0, 1, x, y);
+        };
+        /*\
+         * Matrix.scale
+         [ method ]
+         **
+         * Scales the matrix
+         - x (number) amount to be scaled, with `1` resulting in no change
+         - y (number) #optional amount to scale along the vertical axis. (Otherwise `x` applies to both axes.)
+         - cx (number) #optional horizontal origin point from which to scale
+         - cy (number) #optional vertical origin point from which to scale
+         * Default cx, cy is the middle point of the element.
+        \*/
+        matrixproto.scale = function (x, y, cx, cy) {
+            y == null && (y = x);
+            (cx || cy) && this.add(1, 0, 0, 1, cx, cy);
+            this.add(x, 0, 0, y, 0, 0);
+            (cx || cy) && this.add(1, 0, 0, 1, -cx, -cy);
+            return this;
+        };
+        /*\
+         * Matrix.rotate
+         [ method ]
+         **
+         * Rotates the matrix
+         - a (number) angle of rotation, in degrees
+         - x (number) horizontal origin point from which to rotate
+         - y (number) vertical origin point from which to rotate
+        \*/
+        matrixproto.rotate = function (a, x, y) {
+            a = Snap.rad(a);
+            x = x || 0;
+            y = y || 0;
+            var cos = +math.cos(a).toFixed(9),
+                sin = +math.sin(a).toFixed(9);
+            this.add(cos, sin, -sin, cos, x, y);
+            return this.add(1, 0, 0, 1, -x, -y);
+        };
+        /*\
+         * Matrix.x
+         [ method ]
+         **
+         * Returns x coordinate for given point after transformation described by the matrix. See also @Matrix.y
+         - x (number)
+         - y (number)
+         = (number) x
+        \*/
+        matrixproto.x = function (x, y) {
+            return x * this.a + y * this.c + this.e;
+        };
+        /*\
+         * Matrix.y
+         [ method ]
+         **
+         * Returns y coordinate for given point after transformation described by the matrix. See also @Matrix.x
+         - x (number)
+         - y (number)
+         = (number) y
+        \*/
+        matrixproto.y = function (x, y) {
+            return x * this.b + y * this.d + this.f;
+        };
+        matrixproto.get = function (i) {
+            return +this[Str.fromCharCode(97 + i)].toFixed(4);
+        };
+        matrixproto.toString = function () {
+            return "matrix(" + [this.get(0), this.get(1), this.get(2), this.get(3), this.get(4), this.get(5)].join() + ")";
+        };
+        matrixproto.offset = function () {
+            return [this.e.toFixed(4), this.f.toFixed(4)];
+        };
+        function norm(a) {
+            return a[0] * a[0] + a[1] * a[1];
+        }
+        function normalize(a) {
+            var mag = math.sqrt(norm(a));
+            a[0] && (a[0] /= mag);
+            a[1] && (a[1] /= mag);
+        }
+        /*\
+         * Matrix.determinant
+         [ method ]
+         **
+         * Finds determinant of the given matrix.
+         = (number) determinant
+        \*/
+        matrixproto.determinant = function () {
+            return this.a * this.d - this.b * this.c;
+        };
+        /*\
+         * Matrix.split
+         [ method ]
+         **
+         * Splits matrix into primitive transformations
+         = (object) in format:
+         o dx (number) translation by x
+         o dy (number) translation by y
+         o scalex (number) scale by x
+         o scaley (number) scale by y
+         o shear (number) shear
+         o rotate (number) rotation in deg
+         o isSimple (boolean) could it be represented via simple transformations
+        \*/
+        matrixproto.split = function () {
+            var out = {};
+            // translation
+            out.dx = this.e;
+            out.dy = this.f;
+
+            // scale and shear
+            var row = [[this.a, this.c], [this.b, this.d]];
+            out.scalex = math.sqrt(norm(row[0]));
+            normalize(row[0]);
+
+            out.shear = row[0][0] * row[1][0] + row[0][1] * row[1][1];
+            row[1] = [row[1][0] - row[0][0] * out.shear, row[1][1] - row[0][1] * out.shear];
+
+            out.scaley = math.sqrt(norm(row[1]));
+            normalize(row[1]);
+            out.shear /= out.scaley;
+
+            if (this.determinant() < 0) {
+                out.scalex = -out.scalex;
+            }
+
+            // rotation
+            var sin = -row[0][1],
+                cos = row[1][1];
+            if (cos < 0) {
+                out.rotate = Snap.deg(math.acos(cos));
+                if (sin < 0) {
+                    out.rotate = 360 - out.rotate;
+                }
+            } else {
+                out.rotate = Snap.deg(math.asin(sin));
+            }
+
+            out.isSimple = !+out.shear.toFixed(9) && (out.scalex.toFixed(9) == out.scaley.toFixed(9) || !out.rotate);
+            out.isSuperSimple = !+out.shear.toFixed(9) && out.scalex.toFixed(9) == out.scaley.toFixed(9) && !out.rotate;
+            out.noRotation = !+out.shear.toFixed(9) && !out.rotate;
+            return out;
+        };
+        /*\
+         * Matrix.toTransformString
+         [ method ]
+         **
+         * Returns transform string that represents given matrix
+         = (string) transform string
+        \*/
+        matrixproto.toTransformString = function (shorter) {
+            var s = shorter || this.split();
+            if (!+s.shear.toFixed(9)) {
+                s.scalex = +s.scalex.toFixed(4);
+                s.scaley = +s.scaley.toFixed(4);
+                s.rotate = +s.rotate.toFixed(4);
+                return  (s.dx || s.dy ? "t" + [+s.dx.toFixed(4), +s.dy.toFixed(4)] : E) +
+                        (s.scalex != 1 || s.scaley != 1 ? "s" + [s.scalex, s.scaley, 0, 0] : E) +
+                        (s.rotate ? "r" + [+s.rotate.toFixed(4), 0, 0] : E);
+            } else {
+                return "m" + [this.get(0), this.get(1), this.get(2), this.get(3), this.get(4), this.get(5)];
+            }
+        };
+    })(Matrix.prototype);
+    /*\
+     * Snap.Matrix
+     [ method ]
+     **
+     * Matrix constructor, extend on your own risk.
+     * To create matrices use @Snap.matrix.
+    \*/
+    Snap.Matrix = Matrix;
+    /*\
+     * Snap.matrix
+     [ method ]
+     **
+     * Utility method
+     **
+     * Returns a matrix based on the given parameters
+     - a (number)
+     - b (number)
+     - c (number)
+     - d (number)
+     - e (number)
+     - f (number)
+     * or
+     - svgMatrix (SVGMatrix)
+     = (object) @Matrix
+    \*/
+    Snap.matrix = function (a, b, c, d, e, f) {
+        return new Matrix(a, b, c, d, e, f);
+    };
+});
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
+    var has = "hasOwnProperty",
+        make = Snap._.make,
+        wrap = Snap._.wrap,
+        is = Snap.is,
+        getSomeDefs = Snap._.getSomeDefs,
+        reURLValue = /^url\(#?([^)]+)\)$/,
+        $ = Snap._.$,
+        URL = Snap.url,
+        Str = String,
+        separator = Snap._.separator,
+        E = "";
+    // Attributes event handlers
+    eve.on("snap.util.attr.mask", function (value) {
+        if (value instanceof Element || value instanceof Fragment) {
+            eve.stop();
+            if (value instanceof Fragment && value.node.childNodes.length == 1) {
+                value = value.node.firstChild;
+                getSomeDefs(this).appendChild(value);
+                value = wrap(value);
+            }
+            if (value.type == "mask") {
+                var mask = value;
+            } else {
+                mask = make("mask", getSomeDefs(this));
+                mask.node.appendChild(value.node);
+            }
+            !mask.node.id && $(mask.node, {
+                id: mask.id
+            });
+            $(this.node, {
+                mask: URL(mask.id)
+            });
+        }
+    });
+    (function (clipIt) {
+        eve.on("snap.util.attr.clip", clipIt);
+        eve.on("snap.util.attr.clip-path", clipIt);
+        eve.on("snap.util.attr.clipPath", clipIt);
+    }(function (value) {
+        if (value instanceof Element || value instanceof Fragment) {
+            eve.stop();
+            if (value.type == "clipPath") {
+                var clip = value;
+            } else {
+                clip = make("clipPath", getSomeDefs(this));
+                clip.node.appendChild(value.node);
+                !clip.node.id && $(clip.node, {
+                    id: clip.id
+                });
+            }
+            $(this.node, {
+                "clip-path": URL(clip.node.id || clip.id)
+            });
+        }
+    }));
+    function fillStroke(name) {
+        return function (value) {
+            eve.stop();
+            if (value instanceof Fragment && value.node.childNodes.length == 1 &&
+                (value.node.firstChild.tagName == "radialGradient" ||
+                value.node.firstChild.tagName == "linearGradient" ||
+                value.node.firstChild.tagName == "pattern")) {
+                value = value.node.firstChild;
+                getSomeDefs(this).appendChild(value);
+                value = wrap(value);
+            }
+            if (value instanceof Element) {
+                if (value.type == "radialGradient" || value.type == "linearGradient"
+                   || value.type == "pattern") {
+                    if (!value.node.id) {
+                        $(value.node, {
+                            id: value.id
+                        });
+                    }
+                    var fill = URL(value.node.id);
+                } else {
+                    fill = value.attr(name);
+                }
+            } else {
+                fill = Snap.color(value);
+                if (fill.error) {
+                    var grad = Snap(getSomeDefs(this).ownerSVGElement).gradient(value);
+                    if (grad) {
+                        if (!grad.node.id) {
+                            $(grad.node, {
+                                id: grad.id
+                            });
+                        }
+                        fill = URL(grad.node.id);
+                    } else {
+                        fill = value;
+                    }
+                } else {
+                    fill = Str(fill);
+                }
+            }
+            var attrs = {};
+            attrs[name] = fill;
+            $(this.node, attrs);
+            this.node.style[name] = E;
+        };
+    }
+    eve.on("snap.util.attr.fill", fillStroke("fill"));
+    eve.on("snap.util.attr.stroke", fillStroke("stroke"));
+    var gradrg = /^([lr])(?:\(([^)]*)\))?(.*)$/i;
+    eve.on("snap.util.grad.parse", function parseGrad(string) {
+        string = Str(string);
+        var tokens = string.match(gradrg);
+        if (!tokens) {
+            return null;
+        }
+        var type = tokens[1],
+            params = tokens[2],
+            stops = tokens[3];
+        params = params.split(/\s*,\s*/).map(function (el) {
+            return +el == el ? +el : el;
+        });
+        if (params.length == 1 && params[0] == 0) {
+            params = [];
+        }
+        stops = stops.split("-");
+        stops = stops.map(function (el) {
+            el = el.split(":");
+            var out = {
+                color: el[0]
+            };
+            if (el[1]) {
+                out.offset = parseFloat(el[1]);
+            }
+            return out;
+        });
+        return {
+            type: type,
+            params: params,
+            stops: stops
+        };
+    });
+
+    eve.on("snap.util.attr.d", function (value) {
+        eve.stop();
+        if (is(value, "array") && is(value[0], "array")) {
+            value = Snap.path.toString.call(value);
+        }
+        value = Str(value);
+        if (value.match(/[ruo]/i)) {
+            value = Snap.path.toAbsolute(value);
+        }
+        $(this.node, {d: value});
+    })(-1);
+    eve.on("snap.util.attr.#text", function (value) {
+        eve.stop();
+        value = Str(value);
+        var txt = glob.doc.createTextNode(value);
+        while (this.node.firstChild) {
+            this.node.removeChild(this.node.firstChild);
+        }
+        this.node.appendChild(txt);
+    })(-1);
+    eve.on("snap.util.attr.path", function (value) {
+        eve.stop();
+        this.attr({d: value});
+    })(-1);
+    eve.on("snap.util.attr.class", function (value) {
+        eve.stop();
+        this.node.className.baseVal = value;
+    })(-1);
+    eve.on("snap.util.attr.viewBox", function (value) {
+        var vb;
+        if (is(value, "object") && "x" in value) {
+            vb = [value.x, value.y, value.width, value.height].join(" ");
+        } else if (is(value, "array")) {
+            vb = value.join(" ");
+        } else {
+            vb = value;
+        }
+        $(this.node, {
+            viewBox: vb
+        });
+        eve.stop();
+    })(-1);
+    eve.on("snap.util.attr.transform", function (value) {
+        this.transform(value);
+        eve.stop();
+    })(-1);
+    eve.on("snap.util.attr.r", function (value) {
+        if (this.type == "rect") {
+            eve.stop();
+            $(this.node, {
+                rx: value,
+                ry: value
+            });
+        }
+    })(-1);
+    eve.on("snap.util.attr.textpath", function (value) {
+        eve.stop();
+        if (this.type == "text") {
+            var id, tp, node;
+            if (!value && this.textPath) {
+                tp = this.textPath;
+                while (tp.node.firstChild) {
+                    this.node.appendChild(tp.node.firstChild);
+                }
+                tp.remove();
+                delete this.textPath;
+                return;
+            }
+            if (is(value, "string")) {
+                var defs = getSomeDefs(this),
+                    path = wrap(defs.parentNode).path(value);
+                defs.appendChild(path.node);
+                id = path.id;
+                path.attr({id: id});
+            } else {
+                value = wrap(value);
+                if (value instanceof Element) {
+                    id = value.attr("id");
+                    if (!id) {
+                        id = value.id;
+                        value.attr({id: id});
+                    }
+                }
+            }
+            if (id) {
+                tp = this.textPath;
+                node = this.node;
+                if (tp) {
+                    tp.attr({"xlink:href": "#" + id});
+                } else {
+                    tp = $("textPath", {
+                        "xlink:href": "#" + id
+                    });
+                    while (node.firstChild) {
+                        tp.appendChild(node.firstChild);
+                    }
+                    node.appendChild(tp);
+                    this.textPath = wrap(tp);
+                }
+            }
+        }
+    })(-1);
+    eve.on("snap.util.attr.text", function (value) {
+        if (this.type == "text") {
+            var i = 0,
+                node = this.node,
+                tuner = function (chunk) {
+                    var out = $("tspan");
+                    if (is(chunk, "array")) {
+                        for (var i = 0; i < chunk.length; i++) {
+                            out.appendChild(tuner(chunk[i]));
+                        }
+                    } else {
+                        out.appendChild(glob.doc.createTextNode(chunk));
+                    }
+                    out.normalize && out.normalize();
+                    return out;
+                };
+            while (node.firstChild) {
+                node.removeChild(node.firstChild);
+            }
+            var tuned = tuner(value);
+            while (tuned.firstChild) {
+                node.appendChild(tuned.firstChild);
+            }
+        }
+        eve.stop();
+    })(-1);
+    function setFontSize(value) {
+        eve.stop();
+        if (value == +value) {
+            value += "px";
+        }
+        this.node.style.fontSize = value;
+    }
+    eve.on("snap.util.attr.fontSize", setFontSize)(-1);
+    eve.on("snap.util.attr.font-size", setFontSize)(-1);
+
+
+    eve.on("snap.util.getattr.transform", function () {
+        eve.stop();
+        return this.transform();
+    })(-1);
+    eve.on("snap.util.getattr.textpath", function () {
+        eve.stop();
+        return this.textPath;
+    })(-1);
+    // Markers
+    (function () {
+        function getter(end) {
+            return function () {
+                eve.stop();
+                var style = glob.doc.defaultView.getComputedStyle(this.node, null).getPropertyValue("marker-" + end);
+                if (style == "none") {
+                    return style;
+                } else {
+                    return Snap(glob.doc.getElementById(style.match(reURLValue)[1]));
+                }
+            };
+        }
+        function setter(end) {
+            return function (value) {
+                eve.stop();
+                var name = "marker" + end.charAt(0).toUpperCase() + end.substring(1);
+                if (value == "" || !value) {
+                    this.node.style[name] = "none";
+                    return;
+                }
+                if (value.type == "marker") {
+                    var id = value.node.id;
+                    if (!id) {
+                        $(value.node, {id: value.id});
+                    }
+                    this.node.style[name] = URL(id);
+                    return;
+                }
+            };
+        }
+        eve.on("snap.util.getattr.marker-end", getter("end"))(-1);
+        eve.on("snap.util.getattr.markerEnd", getter("end"))(-1);
+        eve.on("snap.util.getattr.marker-start", getter("start"))(-1);
+        eve.on("snap.util.getattr.markerStart", getter("start"))(-1);
+        eve.on("snap.util.getattr.marker-mid", getter("mid"))(-1);
+        eve.on("snap.util.getattr.markerMid", getter("mid"))(-1);
+        eve.on("snap.util.attr.marker-end", setter("end"))(-1);
+        eve.on("snap.util.attr.markerEnd", setter("end"))(-1);
+        eve.on("snap.util.attr.marker-start", setter("start"))(-1);
+        eve.on("snap.util.attr.markerStart", setter("start"))(-1);
+        eve.on("snap.util.attr.marker-mid", setter("mid"))(-1);
+        eve.on("snap.util.attr.markerMid", setter("mid"))(-1);
+    }());
+    eve.on("snap.util.getattr.r", function () {
+        if (this.type == "rect" && $(this.node, "rx") == $(this.node, "ry")) {
+            eve.stop();
+            return $(this.node, "rx");
+        }
+    })(-1);
+    function textExtract(node) {
+        var out = [];
+        var children = node.childNodes;
+        for (var i = 0, ii = children.length; i < ii; i++) {
+            var chi = children[i];
+            if (chi.nodeType == 3) {
+                out.push(chi.nodeValue);
+            }
+            if (chi.tagName == "tspan") {
+                if (chi.childNodes.length == 1 && chi.firstChild.nodeType == 3) {
+                    out.push(chi.firstChild.nodeValue);
+                } else {
+                    out.push(textExtract(chi));
+                }
+            }
+        }
+        return out;
+    }
+    eve.on("snap.util.getattr.text", function () {
+        if (this.type == "text" || this.type == "tspan") {
+            eve.stop();
+            var out = textExtract(this.node);
+            return out.length == 1 ? out[0] : out;
+        }
+    })(-1);
+    eve.on("snap.util.getattr.#text", function () {
+        return this.node.textContent;
+    })(-1);
+    eve.on("snap.util.getattr.viewBox", function () {
+        eve.stop();
+        var vb = $(this.node, "viewBox");
+        if (vb) {
+            vb = vb.split(separator);
+            return Snap._.box(+vb[0], +vb[1], +vb[2], +vb[3]);
+        } else {
+            return;
+        }
+    })(-1);
+    eve.on("snap.util.getattr.points", function () {
+        var p = $(this.node, "points");
+        eve.stop();
+        if (p) {
+            return p.split(separator);
+        } else {
+            return;
+        }
+    })(-1);
+    eve.on("snap.util.getattr.path", function () {
+        var p = $(this.node, "d");
+        eve.stop();
+        return p;
+    })(-1);
+    eve.on("snap.util.getattr.class", function () {
+        return this.node.className.baseVal;
+    })(-1);
+    function getFontSize() {
+        eve.stop();
+        return this.node.style.fontSize;
+    }
+    eve.on("snap.util.getattr.fontSize", getFontSize)(-1);
+    eve.on("snap.util.getattr.font-size", getFontSize)(-1);
+});
+
+// Copyright (c) 2014 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
+    var rgNotSpace = /\S+/g,
+        rgBadSpace = /[\t\r\n\f]/g,
+        rgTrim = /(^\s+|\s+$)/g,
+        Str = String,
+        elproto = Element.prototype;
+    /*\
+     * Element.addClass
+     [ method ]
+     **
+     * Adds given class name or list of class names to the element.
+     - value (string) class name or space separated list of class names
+     **
+     = (Element) original element.
+    \*/
+    elproto.addClass = function (value) {
+        var classes = Str(value || "").match(rgNotSpace) || [],
+            elem = this.node,
+            className = elem.className.baseVal,
+            curClasses = className.match(rgNotSpace) || [],
+            j,
+            pos,
+            clazz,
+            finalValue;
+
+        if (classes.length) {
+            j = 0;
+            while ((clazz = classes[j++])) {
+                pos = curClasses.indexOf(clazz);
+                if (!~pos) {
+                    curClasses.push(clazz);
+                }
+            }
+
+            finalValue = curClasses.join(" ");
+            if (className != finalValue) {
+                elem.className.baseVal = finalValue;
+            }
+        }
+        return this;
+    };
+    /*\
+     * Element.removeClass
+     [ method ]
+     **
+     * Removes given class name or list of class names from the element.
+     - value (string) class name or space separated list of class names
+     **
+     = (Element) original element.
+    \*/
+    elproto.removeClass = function (value) {
+        var classes = Str(value || "").match(rgNotSpace) || [],
+            elem = this.node,
+            className = elem.className.baseVal,
+            curClasses = className.match(rgNotSpace) || [],
+            j,
+            pos,
+            clazz,
+            finalValue;
+        if (curClasses.length) {
+            j = 0;
+            while ((clazz = classes[j++])) {
+                pos = curClasses.indexOf(clazz);
+                if (~pos) {
+                    curClasses.splice(pos, 1);
+                }
+            }
+
+            finalValue = curClasses.join(" ");
+            if (className != finalValue) {
+                elem.className.baseVal = finalValue;
+            }
+        }
+        return this;
+    };
+    /*\
+     * Element.hasClass
+     [ method ]
+     **
+     * Checks if the element has a given class name in the list of class names applied to it.
+     - value (string) class name
+     **
+     = (boolean) `true` if the element has given class
+    \*/
+    elproto.hasClass = function (value) {
+        var elem = this.node,
+            className = elem.className.baseVal,
+            curClasses = className.match(rgNotSpace) || [];
+        return !!~curClasses.indexOf(value);
+    };
+    /*\
+     * Element.toggleClass
+     [ method ]
+     **
+     * Add or remove one or more classes from the element, depending on either
+     * the class’s presence or the value of the `flag` argument.
+     - value (string) class name or space separated list of class names
+     - flag (boolean) value to determine whether the class should be added or removed
+     **
+     = (Element) original element.
+    \*/
+    elproto.toggleClass = function (value, flag) {
+        if (flag != null) {
+            if (flag) {
+                return this.addClass(value);
+            } else {
+                return this.removeClass(value);
+            }
+        }
+        var classes = (value || "").match(rgNotSpace) || [],
+            elem = this.node,
+            className = elem.className.baseVal,
+            curClasses = className.match(rgNotSpace) || [],
+            j,
+            pos,
+            clazz,
+            finalValue;
+        j = 0;
+        while ((clazz = classes[j++])) {
+            pos = curClasses.indexOf(clazz);
+            if (~pos) {
+                curClasses.splice(pos, 1);
+            } else {
+                curClasses.push(clazz);
+            }
+        }
+
+        finalValue = curClasses.join(" ");
+        if (className != finalValue) {
+            elem.className.baseVal = finalValue;
+        }
+        return this;
+    };
+});
+
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
+    var operators = {
+            "+": function (x, y) {
+                    return x + y;
+                },
+            "-": function (x, y) {
+                    return x - y;
+                },
+            "/": function (x, y) {
+                    return x / y;
+                },
+            "*": function (x, y) {
+                    return x * y;
+                }
+        },
+        Str = String,
+        reUnit = /[a-z]+$/i,
+        reAddon = /^\s*([+\-\/*])\s*=\s*([\d.eE+\-]+)\s*([^\d\s]+)?\s*$/;
+    function getNumber(val) {
+        return val;
+    }
+    function getUnit(unit) {
+        return function (val) {
+            return +val.toFixed(3) + unit;
+        };
+    }
+    eve.on("snap.util.attr", function (val) {
+        var plus = Str(val).match(reAddon);
+        if (plus) {
+            var evnt = eve.nt(),
+                name = evnt.substring(evnt.lastIndexOf(".") + 1),
+                a = this.attr(name),
+                atr = {};
+            eve.stop();
+            var unit = plus[3] || "",
+                aUnit = a.match(reUnit),
+                op = operators[plus[1]];
+            if (aUnit && aUnit == unit) {
+                val = op(parseFloat(a), +plus[2]);
+            } else {
+                a = this.asPX(name);
+                val = op(this.asPX(name), this.asPX(name, plus[2] + unit));
+            }
+            if (isNaN(a) || isNaN(val)) {
+                return;
+            }
+            atr[name] = val;
+            this.attr(atr);
+        }
+    })(-10);
+    eve.on("snap.util.equal", function (name, b) {
+        var A, B, a = Str(this.attr(name) || ""),
+            el = this,
+            bplus = Str(b).match(reAddon);
+        if (bplus) {
+            eve.stop();
+            var unit = bplus[3] || "",
+                aUnit = a.match(reUnit),
+                op = operators[bplus[1]];
+            if (aUnit && aUnit == unit) {
+                return {
+                    from: parseFloat(a),
+                    to: op(parseFloat(a), +bplus[2]),
+                    f: getUnit(aUnit)
+                };
+            } else {
+                a = this.asPX(name);
+                return {
+                    from: a,
+                    to: op(a, this.asPX(name, bplus[2] + unit)),
+                    f: getNumber
+                };
+            }
+        }
+    })(-10);
+});
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
+    var proto = Paper.prototype,
+        is = Snap.is;
+    /*\
+     * Paper.rect
+     [ method ]
+     *
+     * Draws a rectangle
+     **
+     - x (number) x coordinate of the top left corner
+     - y (number) y coordinate of the top left corner
+     - width (number) width
+     - height (number) height
+     - rx (number) #optional horizontal radius for rounded corners, default is 0
+     - ry (number) #optional vertical radius for rounded corners, default is rx or 0
+     = (object) the `rect` element
+     **
+     > Usage
+     | // regular rectangle
+     | var c = paper.rect(10, 10, 50, 50);
+     | // rectangle with rounded corners
+     | var c = paper.rect(40, 40, 50, 50, 10);
+    \*/
+    proto.rect = function (x, y, w, h, rx, ry) {
+        var attr;
+        if (ry == null) {
+            ry = rx;
+        }
+        if (is(x, "object") && x == "[object Object]") {
+            attr = x;
+        } else if (x != null) {
+            attr = {
+                x: x,
+                y: y,
+                width: w,
+                height: h
+            };
+            if (rx != null) {
+                attr.rx = rx;
+                attr.ry = ry;
+            }
+        }
+        return this.el("rect", attr);
+    };
+    /*\
+     * Paper.circle
+     [ method ]
+     **
+     * Draws a circle
+     **
+     - x (number) x coordinate of the centre
+     - y (number) y coordinate of the centre
+     - r (number) radius
+     = (object) the `circle` element
+     **
+     > Usage
+     | var c = paper.circle(50, 50, 40);
+    \*/
+    proto.circle = function (cx, cy, r) {
+        var attr;
+        if (is(cx, "object") && cx == "[object Object]") {
+            attr = cx;
+        } else if (cx != null) {
+            attr = {
+                cx: cx,
+                cy: cy,
+                r: r
+            };
+        }
+        return this.el("circle", attr);
+    };
+
+    var preload = (function () {
+        function onerror() {
+            this.parentNode.removeChild(this);
+        }
+        return function (src, f) {
+            var img = glob.doc.createElement("img"),
+                body = glob.doc.body;
+            img.style.cssText = "position:absolute;left:-9999em;top:-9999em";
+            img.onload = function () {
+                f.call(img);
+                img.onload = img.onerror = null;
+                body.removeChild(img);
+            };
+            img.onerror = onerror;
+            body.appendChild(img);
+            img.src = src;
+        };
+    }());
+
+    /*\
+     * Paper.image
+     [ method ]
+     **
+     * Places an image on the surface
+     **
+     - src (string) URI of the source image
+     - x (number) x offset position
+     - y (number) y offset position
+     - width (number) width of the image
+     - height (number) height of the image
+     = (object) the `image` element
+     * or
+     = (object) Snap element object with type `image`
+     **
+     > Usage
+     | var c = paper.image("apple.png", 10, 10, 80, 80);
+    \*/
+    proto.image = function (src, x, y, width, height) {
+        var el = this.el("image");
+        if (is(src, "object") && "src" in src) {
+            el.attr(src);
+        } else if (src != null) {
+            var set = {
+                "xlink:href": src,
+                preserveAspectRatio: "none"
+            };
+            if (x != null && y != null) {
+                set.x = x;
+                set.y = y;
+            }
+            if (width != null && height != null) {
+                set.width = width;
+                set.height = height;
+            } else {
+                preload(src, function () {
+                    Snap._.$(el.node, {
+                        width: this.offsetWidth,
+                        height: this.offsetHeight
+                    });
+                });
+            }
+            Snap._.$(el.node, set);
+        }
+        return el;
+    };
+    /*\
+     * Paper.ellipse
+     [ method ]
+     **
+     * Draws an ellipse
+     **
+     - x (number) x coordinate of the centre
+     - y (number) y coordinate of the centre
+     - rx (number) horizontal radius
+     - ry (number) vertical radius
+     = (object) the `ellipse` element
+     **
+     > Usage
+     | var c = paper.ellipse(50, 50, 40, 20);
+    \*/
+    proto.ellipse = function (cx, cy, rx, ry) {
+        var attr;
+        if (is(cx, "object") && cx == "[object Object]") {
+            attr = cx;
+        } else if (cx != null) {
+            attr ={
+                cx: cx,
+                cy: cy,
+                rx: rx,
+                ry: ry
+            };
+        }
+        return this.el("ellipse", attr);
+    };
+    // SIERRA Paper.path(): Unclear from the link what a Catmull-Rom curveto is, and why it would make life any easier.
+    /*\
+     * Paper.path
+     [ method ]
+     **
+     * Creates a `<path>` element using the given string as the path's definition
+     - pathString (string) #optional path string in SVG format
+     * Path string consists of one-letter commands, followed by comma seprarated arguments in numerical form. Example:
+     | "M10,20L30,40"
+     * This example features two commands: `M`, with arguments `(10, 20)` and `L` with arguments `(30, 40)`. Uppercase letter commands express coordinates in absolute terms, while lowercase commands express them in relative terms from the most recently declared coordinates.
+     *
+     # <p>Here is short list of commands available, for more details see <a href="http://www.w3.org/TR/SVG/paths.html#PathData" title="Details of a path's data attribute's format are described in the SVG specification.">SVG path string format</a> or <a href="https://developer.mozilla.org/en/SVG/Tutorial/Paths">article about path strings at MDN</a>.</p>
+     # <table><thead><tr><th>Command</th><th>Name</th><th>Parameters</th></tr></thead><tbody>
+     # <tr><td>M</td><td>moveto</td><td>(x y)+</td></tr>
+     # <tr><td>Z</td><td>closepath</td><td>(none)</td></tr>
+     # <tr><td>L</td><td>lineto</td><td>(x y)+</td></tr>
+     # <tr><td>H</td><td>horizontal lineto</td><td>x+</td></tr>
+     # <tr><td>V</td><td>vertical lineto</td><td>y+</td></tr>
+     # <tr><td>C</td><td>curveto</td><td>(x1 y1 x2 y2 x y)+</td></tr>
+     # <tr><td>S</td><td>smooth curveto</td><td>(x2 y2 x y)+</td></tr>
+     # <tr><td>Q</td><td>quadratic Bézier curveto</td><td>(x1 y1 x y)+</td></tr>
+     # <tr><td>T</td><td>smooth quadratic Bézier curveto</td><td>(x y)+</td></tr>
+     # <tr><td>A</td><td>elliptical arc</td><td>(rx ry x-axis-rotation large-arc-flag sweep-flag x y)+</td></tr>
+     # <tr><td>R</td><td><a href="http://en.wikipedia.org/wiki/Catmull–Rom_spline#Catmull.E2.80.93Rom_spline">Catmull-Rom curveto</a>*</td><td>x1 y1 (x y)+</td></tr></tbody></table>
+     * * _Catmull-Rom curveto_ is a not standard SVG command and added to make life easier.
+     * Note: there is a special case when a path consists of only three commands: `M10,10R…z`. In this case the path connects back to its starting point.
+     > Usage
+     | var c = paper.path("M10 10L90 90");
+     | // draw a diagonal line:
+     | // move to 10,10, line to 90,90
+    \*/
+    proto.path = function (d) {
+        var attr;
+        if (is(d, "object") && !is(d, "array")) {
+            attr = d;
+        } else if (d) {
+            attr = {d: d};
+        }
+        return this.el("path", attr);
+    };
+    /*\
+     * Paper.g
+     [ method ]
+     **
+     * Creates a group element
+     **
+     - varargs (…) #optional elements to nest within the group
+     = (object) the `g` element
+     **
+     > Usage
+     | var c1 = paper.circle(),
+     |     c2 = paper.rect(),
+     |     g = paper.g(c2, c1); // note that the order of elements is different
+     * or
+     | var c1 = paper.circle(),
+     |     c2 = paper.rect(),
+     |     g = paper.g();
+     | g.add(c2, c1);
+    \*/
+    /*\
+     * Paper.group
+     [ method ]
+     **
+     * See @Paper.g
+    \*/
+    proto.group = proto.g = function (first) {
+        var attr,
+            el = this.el("g");
+        if (arguments.length == 1 && first && !first.type) {
+            el.attr(first);
+        } else if (arguments.length) {
+            el.add(Array.prototype.slice.call(arguments, 0));
+        }
+        return el;
+    };
+    /*\
+     * Paper.svg
+     [ method ]
+     **
+     * Creates a nested SVG element.
+     - x (number) @optional X of the element
+     - y (number) @optional Y of the element
+     - width (number) @optional width of the element
+     - height (number) @optional height of the element
+     - vbx (number) @optional viewbox X
+     - vby (number) @optional viewbox Y
+     - vbw (number) @optional viewbox width
+     - vbh (number) @optional viewbox height
+     **
+     = (object) the `svg` element
+     **
+    \*/
+    proto.svg = function (x, y, width, height, vbx, vby, vbw, vbh) {
+        var attrs = {};
+        if (is(x, "object") && y == null) {
+            attrs = x;
+        } else {
+            if (x != null) {
+                attrs.x = x;
+            }
+            if (y != null) {
+                attrs.y = y;
+            }
+            if (width != null) {
+                attrs.width = width;
+            }
+            if (height != null) {
+                attrs.height = height;
+            }
+            if (vbx != null && vby != null && vbw != null && vbh != null) {
+                attrs.viewBox = [vbx, vby, vbw, vbh];
+            }
+        }
+        return this.el("svg", attrs);
+    };
+    /*\
+     * Paper.mask
+     [ method ]
+     **
+     * Equivalent in behaviour to @Paper.g, except it’s a mask.
+     **
+     = (object) the `mask` element
+     **
+    \*/
+    proto.mask = function (first) {
+        var attr,
+            el = this.el("mask");
+        if (arguments.length == 1 && first && !first.type) {
+            el.attr(first);
+        } else if (arguments.length) {
+            el.add(Array.prototype.slice.call(arguments, 0));
+        }
+        return el;
+    };
+    /*\
+     * Paper.ptrn
+     [ method ]
+     **
+     * Equivalent in behaviour to @Paper.g, except it’s a pattern.
+     - x (number) @optional X of the element
+     - y (number) @optional Y of the element
+     - width (number) @optional width of the element
+     - height (number) @optional height of the element
+     - vbx (number) @optional viewbox X
+     - vby (number) @optional viewbox Y
+     - vbw (number) @optional viewbox width
+     - vbh (number) @optional viewbox height
+     **
+     = (object) the `pattern` element
+     **
+    \*/
+    proto.ptrn = function (x, y, width, height, vx, vy, vw, vh) {
+        if (is(x, "object")) {
+            var attr = x;
+        } else {
+            attr = {patternUnits: "userSpaceOnUse"};
+            if (x) {
+                attr.x = x;
+            }
+            if (y) {
+                attr.y = y;
+            }
+            if (width != null) {
+                attr.width = width;
+            }
+            if (height != null) {
+                attr.height = height;
+            }
+            if (vx != null && vy != null && vw != null && vh != null) {
+                attr.viewBox = [vx, vy, vw, vh];
+            } else {
+                attr.viewBox = [x || 0, y || 0, width || 0, height || 0];
+            }
+        }
+        return this.el("pattern", attr);
+    };
+    /*\
+     * Paper.use
+     [ method ]
+     **
+     * Creates a <use> element.
+     - id (string) @optional id of element to link
+     * or
+     - id (Element) @optional element to link
+     **
+     = (object) the `use` element
+     **
+    \*/
+    proto.use = function (id) {
+        if (id != null) {
+            if (id instanceof Element) {
+                if (!id.attr("id")) {
+                    id.attr({id: Snap._.id(id)});
+                }
+                id = id.attr("id");
+            }
+            if (String(id).charAt() == "#") {
+                id = id.substring(1);
+            }
+            return this.el("use", {"xlink:href": "#" + id});
+        } else {
+            return Element.prototype.use.call(this);
+        }
+    };
+    /*\
+     * Paper.symbol
+     [ method ]
+     **
+     * Creates a <symbol> element.
+     - vbx (number) @optional viewbox X
+     - vby (number) @optional viewbox Y
+     - vbw (number) @optional viewbox width
+     - vbh (number) @optional viewbox height
+     = (object) the `symbol` element
+     **
+    \*/
+    proto.symbol = function (vx, vy, vw, vh) {
+        var attr = {};
+        if (vx != null && vy != null && vw != null && vh != null) {
+            attr.viewBox = [vx, vy, vw, vh];
+        }
+
+        return this.el("symbol", attr);
+    };
+    /*\
+     * Paper.text
+     [ method ]
+     **
+     * Draws a text string
+     **
+     - x (number) x coordinate position
+     - y (number) y coordinate position
+     - text (string|array) The text string to draw or array of strings to nest within separate `<tspan>` elements
+     = (object) the `text` element
+     **
+     > Usage
+     | var t1 = paper.text(50, 50, "Snap");
+     | var t2 = paper.text(50, 50, ["S","n","a","p"]);
+     | // Text path usage
+     | t1.attr({textpath: "M10,10L100,100"});
+     | // or
+     | var pth = paper.path("M10,10L100,100");
+     | t1.attr({textpath: pth});
+    \*/
+    proto.text = function (x, y, text) {
+        var attr = {};
+        if (is(x, "object")) {
+            attr = x;
+        } else if (x != null) {
+            attr = {
+                x: x,
+                y: y,
+                text: text || ""
+            };
+        }
+        return this.el("text", attr);
+    };
+    /*\
+     * Paper.line
+     [ method ]
+     **
+     * Draws a line
+     **
+     - x1 (number) x coordinate position of the start
+     - y1 (number) y coordinate position of the start
+     - x2 (number) x coordinate position of the end
+     - y2 (number) y coordinate position of the end
+     = (object) the `line` element
+     **
+     > Usage
+     | var t1 = paper.line(50, 50, 100, 100);
+    \*/
+    proto.line = function (x1, y1, x2, y2) {
+        var attr = {};
+        if (is(x1, "object")) {
+            attr = x1;
+        } else if (x1 != null) {
+            attr = {
+                x1: x1,
+                x2: x2,
+                y1: y1,
+                y2: y2
+            };
+        }
+        return this.el("line", attr);
+    };
+    /*\
+     * Paper.polyline
+     [ method ]
+     **
+     * Draws a polyline
+     **
+     - points (array) array of points
+     * or
+     - varargs (…) points
+     = (object) the `polyline` element
+     **
+     > Usage
+     | var p1 = paper.polyline([10, 10, 100, 100]);
+     | var p2 = paper.polyline(10, 10, 100, 100);
+    \*/
+    proto.polyline = function (points) {
+        if (arguments.length > 1) {
+            points = Array.prototype.slice.call(arguments, 0);
+        }
+        var attr = {};
+        if (is(points, "object") && !is(points, "array")) {
+            attr = points;
+        } else if (points != null) {
+            attr = {points: points};
+        }
+        return this.el("polyline", attr);
+    };
+    /*\
+     * Paper.polygon
+     [ method ]
+     **
+     * Draws a polygon. See @Paper.polyline
+    \*/
+    proto.polygon = function (points) {
+        if (arguments.length > 1) {
+            points = Array.prototype.slice.call(arguments, 0);
+        }
+        var attr = {};
+        if (is(points, "object") && !is(points, "array")) {
+            attr = points;
+        } else if (points != null) {
+            attr = {points: points};
+        }
+        return this.el("polygon", attr);
+    };
+    // gradients
+    (function () {
+        var $ = Snap._.$;
+        // gradients' helpers
+        function Gstops() {
+            return this.selectAll("stop");
+        }
+        function GaddStop(color, offset) {
+            var stop = $("stop"),
+                attr = {
+                    offset: +offset + "%"
+                };
+            color = Snap.color(color);
+            attr["stop-color"] = color.hex;
+            if (color.opacity < 1) {
+                attr["stop-opacity"] = color.opacity;
+            }
+            $(stop, attr);
+            this.node.appendChild(stop);
+            return this;
+        }
+        function GgetBBox() {
+            if (this.type == "linearGradient") {
+                var x1 = $(this.node, "x1") || 0,
+                    x2 = $(this.node, "x2") || 1,
+                    y1 = $(this.node, "y1") || 0,
+                    y2 = $(this.node, "y2") || 0;
+                return Snap._.box(x1, y1, math.abs(x2 - x1), math.abs(y2 - y1));
+            } else {
+                var cx = this.node.cx || .5,
+                    cy = this.node.cy || .5,
+                    r = this.node.r || 0;
+                return Snap._.box(cx - r, cy - r, r * 2, r * 2);
+            }
+        }
+        function gradient(defs, str) {
+            var grad = eve("snap.util.grad.parse", null, str).firstDefined(),
+                el;
+            if (!grad) {
+                return null;
+            }
+            grad.params.unshift(defs);
+            if (grad.type.toLowerCase() == "l") {
+                el = gradientLinear.apply(0, grad.params);
+            } else {
+                el = gradientRadial.apply(0, grad.params);
+            }
+            if (grad.type != grad.type.toLowerCase()) {
+                $(el.node, {
+                    gradientUnits: "userSpaceOnUse"
+                });
+            }
+            var stops = grad.stops,
+                len = stops.length,
+                start = 0,
+                j = 0;
+            function seed(i, end) {
+                var step = (end - start) / (i - j);
+                for (var k = j; k < i; k++) {
+                    stops[k].offset = +(+start + step * (k - j)).toFixed(2);
+                }
+                j = i;
+                start = end;
+            }
+            len--;
+            for (var i = 0; i < len; i++) if ("offset" in stops[i]) {
+                seed(i, stops[i].offset);
+            }
+            stops[len].offset = stops[len].offset || 100;
+            seed(len, stops[len].offset);
+            for (i = 0; i <= len; i++) {
+                var stop = stops[i];
+                el.addStop(stop.color, stop.offset);
+            }
+            return el;
+        }
+        function gradientLinear(defs, x1, y1, x2, y2) {
+            var el = Snap._.make("linearGradient", defs);
+            el.stops = Gstops;
+            el.addStop = GaddStop;
+            el.getBBox = GgetBBox;
+            if (x1 != null) {
+                $(el.node, {
+                    x1: x1,
+                    y1: y1,
+                    x2: x2,
+                    y2: y2
+                });
+            }
+            return el;
+        }
+        function gradientRadial(defs, cx, cy, r, fx, fy) {
+            var el = Snap._.make("radialGradient", defs);
+            el.stops = Gstops;
+            el.addStop = GaddStop;
+            el.getBBox = GgetBBox;
+            if (cx != null) {
+                $(el.node, {
+                    cx: cx,
+                    cy: cy,
+                    r: r
+                });
+            }
+            if (fx != null && fy != null) {
+                $(el.node, {
+                    fx: fx,
+                    fy: fy
+                });
+            }
+            return el;
+        }
+        /*\
+         * Paper.gradient
+         [ method ]
+         **
+         * Creates a gradient element
+         **
+         - gradient (string) gradient descriptor
+         > Gradient Descriptor
+         * The gradient descriptor is an expression formatted as
+         * follows: `<type>(<coords>)<colors>`.  The `<type>` can be
+         * either linear or radial.  The uppercase `L` or `R` letters
+         * indicate absolute coordinates offset from the SVG surface.
+         * Lowercase `l` or `r` letters indicate coordinates
+         * calculated relative to the element to which the gradient is
+         * applied.  Coordinates specify a linear gradient vector as
+         * `x1`, `y1`, `x2`, `y2`, or a radial gradient as `cx`, `cy`,
+         * `r` and optional `fx`, `fy` specifying a focal point away
+         * from the center of the circle. Specify `<colors>` as a list
+         * of dash-separated CSS color values.  Each color may be
+         * followed by a custom offset value, separated with a colon
+         * character.
+         > Examples
+         * Linear gradient, relative from top-left corner to bottom-right
+         * corner, from black through red to white:
+         | var g = paper.gradient("l(0, 0, 1, 1)#000-#f00-#fff");
+         * Linear gradient, absolute from (0, 0) to (100, 100), from black
+         * through red at 25% to white:
+         | var g = paper.gradient("L(0, 0, 100, 100)#000-#f00:25-#fff");
+         * Radial gradient, relative from the center of the element with radius
+         * half the width, from black to white:
+         | var g = paper.gradient("r(0.5, 0.5, 0.5)#000-#fff");
+         * To apply the gradient:
+         | paper.circle(50, 50, 40).attr({
+         |     fill: g
+         | });
+         = (object) the `gradient` element
+        \*/
+        proto.gradient = function (str) {
+            return gradient(this.defs, str);
+        };
+        proto.gradientLinear = function (x1, y1, x2, y2) {
+            return gradientLinear(this.defs, x1, y1, x2, y2);
+        };
+        proto.gradientRadial = function (cx, cy, r, fx, fy) {
+            return gradientRadial(this.defs, cx, cy, r, fx, fy);
+        };
+        /*\
+         * Paper.toString
+         [ method ]
+         **
+         * Returns SVG code for the @Paper
+         = (string) SVG code for the @Paper
+        \*/
+        proto.toString = function () {
+            var doc = this.node.ownerDocument,
+                f = doc.createDocumentFragment(),
+                d = doc.createElement("div"),
+                svg = this.node.cloneNode(true),
+                res;
+            f.appendChild(d);
+            d.appendChild(svg);
+            Snap._.$(svg, {xmlns: "http://www.w3.org/2000/svg"});
+            res = d.innerHTML;
+            f.removeChild(f.firstChild);
+            return res;
+        };
+        /*\
+         * Paper.toDataURL
+         [ method ]
+         **
+         * Returns SVG code for the @Paper as Data URI string.
+         = (string) Data URI string
+        \*/
+        proto.toDataURL = function () {
+            if (window && window.btoa) {
+                return "data:image/svg+xml;base64," + btoa(unescape(encodeURIComponent(this)));
+            }
+        };
+        /*\
+         * Paper.clear
+         [ method ]
+         **
+         * Removes all child nodes of the paper, except <defs>.
+        \*/
+        proto.clear = function () {
+            var node = this.node.firstChild,
+                next;
+            while (node) {
+                next = node.nextSibling;
+                if (node.tagName != "defs") {
+                    node.parentNode.removeChild(node);
+                } else {
+                    proto.clear.call({node: node});
+                }
+                node = next;
+            }
+        };
+    }());
+});
+
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob) {
+    var elproto = Element.prototype,
+        is = Snap.is,
+        clone = Snap._.clone,
+        has = "hasOwnProperty",
+        p2s = /,?([a-z]),?/gi,
+        toFloat = parseFloat,
+        math = Math,
+        PI = math.PI,
+        mmin = math.min,
+        mmax = math.max,
+        pow = math.pow,
+        abs = math.abs;
+    function paths(ps) {
+        var p = paths.ps = paths.ps || {};
+        if (p[ps]) {
+            p[ps].sleep = 100;
+        } else {
+            p[ps] = {
+                sleep: 100
+            };
+        }
+        setTimeout(function () {
+            for (var key in p) if (p[has](key) && key != ps) {
+                p[key].sleep--;
+                !p[key].sleep && delete p[key];
+            }
+        });
+        return p[ps];
+    }
+    function box(x, y, width, height) {
+        if (x == null) {
+            x = y = width = height = 0;
+        }
+        if (y == null) {
+            y = x.y;
+            width = x.width;
+            height = x.height;
+            x = x.x;
+        }
+        return {
+            x: x,
+            y: y,
+            width: width,
+            w: width,
+            height: height,
+            h: height,
+            x2: x + width,
+            y2: y + height,
+            cx: x + width / 2,
+            cy: y + height / 2,
+            r1: math.min(width, height) / 2,
+            r2: math.max(width, height) / 2,
+            r0: math.sqrt(width * width + height * height) / 2,
+            path: rectPath(x, y, width, height),
+            vb: [x, y, width, height].join(" ")
+        };
+    }
+    function toString() {
+        return this.join(",").replace(p2s, "$1");
+    }
+    function pathClone(pathArray) {
+        var res = clone(pathArray);
+        res.toString = toString;
+        return res;
+    }
+    function getPointAtSegmentLength(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, length) {
+        if (length == null) {
+            return bezlen(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y);
+        } else {
+            return findDotsAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y,
+                getTotLen(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, length));
+        }
+    }
+    function getLengthFactory(istotal, subpath) {
+        function O(val) {
+            return +(+val).toFixed(3);
+        }
+        return Snap._.cacher(function (path, length, onlystart) {
+            if (path instanceof Element) {
+                path = path.attr("d");
+            }
+            path = path2curve(path);
+            var x, y, p, l, sp = "", subpaths = {}, point,
+                len = 0;
+            for (var i = 0, ii = path.length; i < ii; i++) {
+                p = path[i];
+                if (p[0] == "M") {
+                    x = +p[1];
+                    y = +p[2];
+                } else {
+                    l = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6]);
+                    if (len + l > length) {
+                        if (subpath && !subpaths.start) {
+                            point = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6], length - len);
+                            sp += [
+                                "C" + O(point.start.x),
+                                O(point.start.y),
+                                O(point.m.x),
+                                O(point.m.y),
+                                O(point.x),
+                                O(point.y)
+                            ];
+                            if (onlystart) {return sp;}
+                            subpaths.start = sp;
+                            sp = [
+                                "M" + O(point.x),
+                                O(point.y) + "C" + O(point.n.x),
+                                O(point.n.y),
+                                O(point.end.x),
+                                O(point.end.y),
+                                O(p[5]),
+                                O(p[6])
+                            ].join();
+                            len += l;
+                            x = +p[5];
+                            y = +p[6];
+                            continue;
+                        }
+                        if (!istotal && !subpath) {
+                            point = getPointAtSegmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6], length - len);
+                            return point;
+                        }
+                    }
+                    len += l;
+                    x = +p[5];
+                    y = +p[6];
+                }
+                sp += p.shift() + p;
+            }
+            subpaths.end = sp;
+            point = istotal ? len : subpath ? subpaths : findDotsAtSegment(x, y, p[0], p[1], p[2], p[3], p[4], p[5], 1);
+            return point;
+        }, null, Snap._.clone);
+    }
+    var getTotalLength = getLengthFactory(1),
+        getPointAtLength = getLengthFactory(),
+        getSubpathsAtLength = getLengthFactory(0, 1);
+    function findDotsAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t) {
+        var t1 = 1 - t,
+            t13 = pow(t1, 3),
+            t12 = pow(t1, 2),
+            t2 = t * t,
+            t3 = t2 * t,
+            x = t13 * p1x + t12 * 3 * t * c1x + t1 * 3 * t * t * c2x + t3 * p2x,
+            y = t13 * p1y + t12 * 3 * t * c1y + t1 * 3 * t * t * c2y + t3 * p2y,
+            mx = p1x + 2 * t * (c1x - p1x) + t2 * (c2x - 2 * c1x + p1x),
+            my = p1y + 2 * t * (c1y - p1y) + t2 * (c2y - 2 * c1y + p1y),
+            nx = c1x + 2 * t * (c2x - c1x) + t2 * (p2x - 2 * c2x + c1x),
+            ny = c1y + 2 * t * (c2y - c1y) + t2 * (p2y - 2 * c2y + c1y),
+            ax = t1 * p1x + t * c1x,
+            ay = t1 * p1y + t * c1y,
+            cx = t1 * c2x + t * p2x,
+            cy = t1 * c2y + t * p2y,
+            alpha = (90 - math.atan2(mx - nx, my - ny) * 180 / PI);
+        // (mx > nx || my < ny) && (alpha += 180);
+        return {
+            x: x,
+            y: y,
+            m: {x: mx, y: my},
+            n: {x: nx, y: ny},
+            start: {x: ax, y: ay},
+            end: {x: cx, y: cy},
+            alpha: alpha
+        };
+    }
+    function bezierBBox(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y) {
+        if (!Snap.is(p1x, "array")) {
+            p1x = [p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y];
+        }
+        var bbox = curveDim.apply(null, p1x);
+        return box(
+            bbox.min.x,
+            bbox.min.y,
+            bbox.max.x - bbox.min.x,
+            bbox.max.y - bbox.min.y
+        );
+    }
+    function isPointInsideBBox(bbox, x, y) {
+        return  x >= bbox.x &&
+                x <= bbox.x + bbox.width &&
+                y >= bbox.y &&
+                y <= bbox.y + bbox.height;
+    }
+    function isBBoxIntersect(bbox1, bbox2) {
+        bbox1 = box(bbox1);
+        bbox2 = box(bbox2);
+        return isPointInsideBBox(bbox2, bbox1.x, bbox1.y)
+            || isPointInsideBBox(bbox2, bbox1.x2, bbox1.y)
+            || isPointInsideBBox(bbox2, bbox1.x, bbox1.y2)
+            || isPointInsideBBox(bbox2, bbox1.x2, bbox1.y2)
+            || isPointInsideBBox(bbox1, bbox2.x, bbox2.y)
+            || isPointInsideBBox(bbox1, bbox2.x2, bbox2.y)
+            || isPointInsideBBox(bbox1, bbox2.x, bbox2.y2)
+            || isPointInsideBBox(bbox1, bbox2.x2, bbox2.y2)
+            || (bbox1.x < bbox2.x2 && bbox1.x > bbox2.x
+                || bbox2.x < bbox1.x2 && bbox2.x > bbox1.x)
+            && (bbox1.y < bbox2.y2 && bbox1.y > bbox2.y
+                || bbox2.y < bbox1.y2 && bbox2.y > bbox1.y);
+    }
+    function base3(t, p1, p2, p3, p4) {
+        var t1 = -3 * p1 + 9 * p2 - 9 * p3 + 3 * p4,
+            t2 = t * t1 + 6 * p1 - 12 * p2 + 6 * p3;
+        return t * t2 - 3 * p1 + 3 * p2;
+    }
+    function bezlen(x1, y1, x2, y2, x3, y3, x4, y4, z) {
+        if (z == null) {
+            z = 1;
+        }
+        z = z > 1 ? 1 : z < 0 ? 0 : z;
+        var z2 = z / 2,
+            n = 12,
+            Tvalues = [-.1252,.1252,-.3678,.3678,-.5873,.5873,-.7699,.7699,-.9041,.9041,-.9816,.9816],
+            Cvalues = [0.2491,0.2491,0.2335,0.2335,0.2032,0.2032,0.1601,0.1601,0.1069,0.1069,0.0472,0.0472],
+            sum = 0;
+        for (var i = 0; i < n; i++) {
+            var ct = z2 * Tvalues[i] + z2,
+                xbase = base3(ct, x1, x2, x3, x4),
+                ybase = base3(ct, y1, y2, y3, y4),
+                comb = xbase * xbase + ybase * ybase;
+            sum += Cvalues[i] * math.sqrt(comb);
+        }
+        return z2 * sum;
+    }
+    function getTotLen(x1, y1, x2, y2, x3, y3, x4, y4, ll) {
+        if (ll < 0 || bezlen(x1, y1, x2, y2, x3, y3, x4, y4) < ll) {
+            return;
+        }
+        var t = 1,
+            step = t / 2,
+            t2 = t - step,
+            l,
+            e = .01;
+        l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
+        while (abs(l - ll) > e) {
+            step /= 2;
+            t2 += (l < ll ? 1 : -1) * step;
+            l = bezlen(x1, y1, x2, y2, x3, y3, x4, y4, t2);
+        }
+        return t2;
+    }
+    function intersect(x1, y1, x2, y2, x3, y3, x4, y4) {
+        if (
+            mmax(x1, x2) < mmin(x3, x4) ||
+            mmin(x1, x2) > mmax(x3, x4) ||
+            mmax(y1, y2) < mmin(y3, y4) ||
+            mmin(y1, y2) > mmax(y3, y4)
+        ) {
+            return;
+        }
+        var nx = (x1 * y2 - y1 * x2) * (x3 - x4) - (x1 - x2) * (x3 * y4 - y3 * x4),
+            ny = (x1 * y2 - y1 * x2) * (y3 - y4) - (y1 - y2) * (x3 * y4 - y3 * x4),
+            denominator = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);
+
+        if (!denominator) {
+            return;
+        }
+        var px = nx / denominator,
+            py = ny / denominator,
+            px2 = +px.toFixed(2),
+            py2 = +py.toFixed(2);
+        if (
+            px2 < +mmin(x1, x2).toFixed(2) ||
+            px2 > +mmax(x1, x2).toFixed(2) ||
+            px2 < +mmin(x3, x4).toFixed(2) ||
+            px2 > +mmax(x3, x4).toFixed(2) ||
+            py2 < +mmin(y1, y2).toFixed(2) ||
+            py2 > +mmax(y1, y2).toFixed(2) ||
+            py2 < +mmin(y3, y4).toFixed(2) ||
+            py2 > +mmax(y3, y4).toFixed(2)
+        ) {
+            return;
+        }
+        return {x: px, y: py};
+    }
+    function inter(bez1, bez2) {
+        return interHelper(bez1, bez2);
+    }
+    function interCount(bez1, bez2) {
+        return interHelper(bez1, bez2, 1);
+    }
+    function interHelper(bez1, bez2, justCount) {
+        var bbox1 = bezierBBox(bez1),
+            bbox2 = bezierBBox(bez2);
+        if (!isBBoxIntersect(bbox1, bbox2)) {
+            return justCount ? 0 : [];
+        }
+        var l1 = bezlen.apply(0, bez1),
+            l2 = bezlen.apply(0, bez2),
+            n1 = ~~(l1 / 8),
+            n2 = ~~(l2 / 8),
+            dots1 = [],
+            dots2 = [],
+            xy = {},
+            res = justCount ? 0 : [];
+        for (var i = 0; i < n1 + 1; i++) {
+            var p = findDotsAtSegment.apply(0, bez1.concat(i / n1));
+            dots1.push({x: p.x, y: p.y, t: i / n1});
+        }
+        for (i = 0; i < n2 + 1; i++) {
+            p = findDotsAtSegment.apply(0, bez2.concat(i / n2));
+            dots2.push({x: p.x, y: p.y, t: i / n2});
+        }
+        for (i = 0; i < n1; i++) {
+            for (var j = 0; j < n2; j++) {
+                var di = dots1[i],
+                    di1 = dots1[i + 1],
+                    dj = dots2[j],
+                    dj1 = dots2[j + 1],
+                    ci = abs(di1.x - di.x) < .001 ? "y" : "x",
+                    cj = abs(dj1.x - dj.x) < .001 ? "y" : "x",
+                    is = intersect(di.x, di.y, di1.x, di1.y, dj.x, dj.y, dj1.x, dj1.y);
+                if (is) {
+                    if (xy[is.x.toFixed(4)] == is.y.toFixed(4)) {
+                        continue;
+                    }
+                    xy[is.x.toFixed(4)] = is.y.toFixed(4);
+                    var t1 = di.t + abs((is[ci] - di[ci]) / (di1[ci] - di[ci])) * (di1.t - di.t),
+                        t2 = dj.t + abs((is[cj] - dj[cj]) / (dj1[cj] - dj[cj])) * (dj1.t - dj.t);
+                    if (t1 >= 0 && t1 <= 1 && t2 >= 0 && t2 <= 1) {
+                        if (justCount) {
+                            res++;
+                        } else {
+                            res.push({
+                                x: is.x,
+                                y: is.y,
+                                t1: t1,
+                                t2: t2
+                            });
+                        }
+                    }
+                }
+            }
+        }
+        return res;
+    }
+    function pathIntersection(path1, path2) {
+        return interPathHelper(path1, path2);
+    }
+    function pathIntersectionNumber(path1, path2) {
+        return interPathHelper(path1, path2, 1);
+    }
+    function interPathHelper(path1, path2, justCount) {
+        path1 = path2curve(path1);
+        path2 = path2curve(path2);
+        var x1, y1, x2, y2, x1m, y1m, x2m, y2m, bez1, bez2,
+            res = justCount ? 0 : [];
+        for (var i = 0, ii = path1.length; i < ii; i++) {
+            var pi = path1[i];
+            if (pi[0] == "M") {
+                x1 = x1m = pi[1];
+                y1 = y1m = pi[2];
+            } else {
+                if (pi[0] == "C") {
+                    bez1 = [x1, y1].concat(pi.slice(1));
+                    x1 = bez1[6];
+                    y1 = bez1[7];
+                } else {
+                    bez1 = [x1, y1, x1, y1, x1m, y1m, x1m, y1m];
+                    x1 = x1m;
+                    y1 = y1m;
+                }
+                for (var j = 0, jj = path2.length; j < jj; j++) {
+                    var pj = path2[j];
+                    if (pj[0] == "M") {
+                        x2 = x2m = pj[1];
+                        y2 = y2m = pj[2];
+                    } else {
+                        if (pj[0] == "C") {
+                            bez2 = [x2, y2].concat(pj.slice(1));
+                            x2 = bez2[6];
+                            y2 = bez2[7];
+                        } else {
+                            bez2 = [x2, y2, x2, y2, x2m, y2m, x2m, y2m];
+                            x2 = x2m;
+                            y2 = y2m;
+                        }
+                        var intr = interHelper(bez1, bez2, justCount);
+                        if (justCount) {
+                            res += intr;
+                        } else {
+                            for (var k = 0, kk = intr.length; k < kk; k++) {
+                                intr[k].segment1 = i;
+                                intr[k].segment2 = j;
+                                intr[k].bez1 = bez1;
+                                intr[k].bez2 = bez2;
+                            }
+                            res = res.concat(intr);
+                        }
+                    }
+                }
+            }
+        }
+        return res;
+    }
+    function isPointInsidePath(path, x, y) {
+        var bbox = pathBBox(path);
+        return isPointInsideBBox(bbox, x, y) &&
+               interPathHelper(path, [["M", x, y], ["H", bbox.x2 + 10]], 1) % 2 == 1;
+    }
+    function pathBBox(path) {
+        var pth = paths(path);
+        if (pth.bbox) {
+            return clone(pth.bbox);
+        }
+        if (!path) {
+            return box();
+        }
+        path = path2curve(path);
+        var x = 0,
+            y = 0,
+            X = [],
+            Y = [],
+            p;
+        for (var i = 0, ii = path.length; i < ii; i++) {
+            p = path[i];
+            if (p[0] == "M") {
+                x = p[1];
+                y = p[2];
+                X.push(x);
+                Y.push(y);
+            } else {
+                var dim = curveDim(x, y, p[1], p[2], p[3], p[4], p[5], p[6]);
+                X = X.concat(dim.min.x, dim.max.x);
+                Y = Y.concat(dim.min.y, dim.max.y);
+                x = p[5];
+                y = p[6];
+            }
+        }
+        var xmin = mmin.apply(0, X),
+            ymin = mmin.apply(0, Y),
+            xmax = mmax.apply(0, X),
+            ymax = mmax.apply(0, Y),
+            bb = box(xmin, ymin, xmax - xmin, ymax - ymin);
+        pth.bbox = clone(bb);
+        return bb;
+    }
+    function rectPath(x, y, w, h, r) {
+        if (r) {
+            return [
+                ["M", +x + (+r), y],
+                ["l", w - r * 2, 0],
+                ["a", r, r, 0, 0, 1, r, r],
+                ["l", 0, h - r * 2],
+                ["a", r, r, 0, 0, 1, -r, r],
+                ["l", r * 2 - w, 0],
+                ["a", r, r, 0, 0, 1, -r, -r],
+                ["l", 0, r * 2 - h],
+                ["a", r, r, 0, 0, 1, r, -r],
+                ["z"]
+            ];
+        }
+        var res = [["M", x, y], ["l", w, 0], ["l", 0, h], ["l", -w, 0], ["z"]];
+        res.toString = toString;
+        return res;
+    }
+    function ellipsePath(x, y, rx, ry, a) {
+        if (a == null && ry == null) {
+            ry = rx;
+        }
+        x = +x;
+        y = +y;
+        rx = +rx;
+        ry = +ry;
+        if (a != null) {
+            var rad = Math.PI / 180,
+                x1 = x + rx * Math.cos(-ry * rad),
+                x2 = x + rx * Math.cos(-a * rad),
+                y1 = y + rx * Math.sin(-ry * rad),
+                y2 = y + rx * Math.sin(-a * rad),
+                res = [["M", x1, y1], ["A", rx, rx, 0, +(a - ry > 180), 0, x2, y2]];
+        } else {
+            res = [
+                ["M", x, y],
+                ["m", 0, -ry],
+                ["a", rx, ry, 0, 1, 1, 0, 2 * ry],
+                ["a", rx, ry, 0, 1, 1, 0, -2 * ry],
+                ["z"]
+            ];
+        }
+        res.toString = toString;
+        return res;
+    }
+    var unit2px = Snap._unit2px,
+        getPath = {
+        path: function (el) {
+            return el.attr("path");
+        },
+        circle: function (el) {
+            var attr = unit2px(el);
+            return ellipsePath(attr.cx, attr.cy, attr.r);
+        },
+        ellipse: function (el) {
+            var attr = unit2px(el);
+            return ellipsePath(attr.cx || 0, attr.cy || 0, attr.rx, attr.ry);
+        },
+        rect: function (el) {
+            var attr = unit2px(el);
+            return rectPath(attr.x || 0, attr.y || 0, attr.width, attr.height, attr.rx, attr.ry);
+        },
+        image: function (el) {
+            var attr = unit2px(el);
+            return rectPath(attr.x || 0, attr.y || 0, attr.width, attr.height);
+        },
+        line: function (el) {
+            return "M" + [el.attr("x1") || 0, el.attr("y1") || 0, el.attr("x2"), el.attr("y2")];
+        },
+        polyline: function (el) {
+            return "M" + el.attr("points");
+        },
+        polygon: function (el) {
+            return "M" + el.attr("points") + "z";
+        },
+        deflt: function (el) {
+            var bbox = el.node.getBBox();
+            return rectPath(bbox.x, bbox.y, bbox.width, bbox.height);
+        }
+    };
+    function pathToRelative(pathArray) {
+        var pth = paths(pathArray),
+            lowerCase = String.prototype.toLowerCase;
+        if (pth.rel) {
+            return pathClone(pth.rel);
+        }
+        if (!Snap.is(pathArray, "array") || !Snap.is(pathArray && pathArray[0], "array")) {
+            pathArray = Snap.parsePathString(pathArray);
+        }
+        var res = [],
+            x = 0,
+            y = 0,
+            mx = 0,
+            my = 0,
+            start = 0;
+        if (pathArray[0][0] == "M") {
+            x = pathArray[0][1];
+            y = pathArray[0][2];
+            mx = x;
+            my = y;
+            start++;
+            res.push(["M", x, y]);
+        }
+        for (var i = start, ii = pathArray.length; i < ii; i++) {
+            var r = res[i] = [],
+                pa = pathArray[i];
+            if (pa[0] != lowerCase.call(pa[0])) {
+                r[0] = lowerCase.call(pa[0]);
+                switch (r[0]) {
+                    case "a":
+                        r[1] = pa[1];
+                        r[2] = pa[2];
+                        r[3] = pa[3];
+                        r[4] = pa[4];
+                        r[5] = pa[5];
+                        r[6] = +(pa[6] - x).toFixed(3);
+                        r[7] = +(pa[7] - y).toFixed(3);
+                        break;
+                    case "v":
+                        r[1] = +(pa[1] - y).toFixed(3);
+                        break;
+                    case "m":
+                        mx = pa[1];
+                        my = pa[2];
+                    default:
+                        for (var j = 1, jj = pa.length; j < jj; j++) {
+                            r[j] = +(pa[j] - ((j % 2) ? x : y)).toFixed(3);
+                        }
+                }
+            } else {
+                r = res[i] = [];
+                if (pa[0] == "m") {
+                    mx = pa[1] + x;
+                    my = pa[2] + y;
+                }
+                for (var k = 0, kk = pa.length; k < kk; k++) {
+                    res[i][k] = pa[k];
+                }
+            }
+            var len = res[i].length;
+            switch (res[i][0]) {
+                case "z":
+                    x = mx;
+                    y = my;
+                    break;
+                case "h":
+                    x += +res[i][len - 1];
+                    break;
+                case "v":
+                    y += +res[i][len - 1];
+                    break;
+                default:
+                    x += +res[i][len - 2];
+                    y += +res[i][len - 1];
+            }
+        }
+        res.toString = toString;
+        pth.rel = pathClone(res);
+        return res;
+    }
+    function pathToAbsolute(pathArray) {
+        var pth = paths(pathArray);
+        if (pth.abs) {
+            return pathClone(pth.abs);
+        }
+        if (!is(pathArray, "array") || !is(pathArray && pathArray[0], "array")) { // rough assumption
+            pathArray = Snap.parsePathString(pathArray);
+        }
+        if (!pathArray || !pathArray.length) {
+            return [["M", 0, 0]];
+        }
+        var res = [],
+            x = 0,
+            y = 0,
+            mx = 0,
+            my = 0,
+            start = 0,
+            pa0;
+        if (pathArray[0][0] == "M") {
+            x = +pathArray[0][1];
+            y = +pathArray[0][2];
+            mx = x;
+            my = y;
+            start++;
+            res[0] = ["M", x, y];
+        }
+        var crz = pathArray.length == 3 &&
+            pathArray[0][0] == "M" &&
+            pathArray[1][0].toUpperCase() == "R" &&
+            pathArray[2][0].toUpperCase() == "Z";
+        for (var r, pa, i = start, ii = pathArray.length; i < ii; i++) {
+            res.push(r = []);
+            pa = pathArray[i];
+            pa0 = pa[0];
+            if (pa0 != pa0.toUpperCase()) {
+                r[0] = pa0.toUpperCase();
+                switch (r[0]) {
+                    case "A":
+                        r[1] = pa[1];
+                        r[2] = pa[2];
+                        r[3] = pa[3];
+                        r[4] = pa[4];
+                        r[5] = pa[5];
+                        r[6] = +pa[6] + x;
+                        r[7] = +pa[7] + y;
+                        break;
+                    case "V":
+                        r[1] = +pa[1] + y;
+                        break;
+                    case "H":
+                        r[1] = +pa[1] + x;
+                        break;
+                    case "R":
+                        var dots = [x, y].concat(pa.slice(1));
+                        for (var j = 2, jj = dots.length; j < jj; j++) {
+                            dots[j] = +dots[j] + x;
+                            dots[++j] = +dots[j] + y;
+                        }
+                        res.pop();
+                        res = res.concat(catmullRom2bezier(dots, crz));
+                        break;
+                    case "O":
+                        res.pop();
+                        dots = ellipsePath(x, y, pa[1], pa[2]);
+                        dots.push(dots[0]);
+                        res = res.concat(dots);
+                        break;
+                    case "U":
+                        res.pop();
+                        res = res.concat(ellipsePath(x, y, pa[1], pa[2], pa[3]));
+                        r = ["U"].concat(res[res.length - 1].slice(-2));
+                        break;
+                    case "M":
+                        mx = +pa[1] + x;
+                        my = +pa[2] + y;
+                    default:
+                        for (j = 1, jj = pa.length; j < jj; j++) {
+                            r[j] = +pa[j] + ((j % 2) ? x : y);
+                        }
+                }
+            } else if (pa0 == "R") {
+                dots = [x, y].concat(pa.slice(1));
+                res.pop();
+                res = res.concat(catmullRom2bezier(dots, crz));
+                r = ["R"].concat(pa.slice(-2));
+            } else if (pa0 == "O") {
+                res.pop();
+                dots = ellipsePath(x, y, pa[1], pa[2]);
+                dots.push(dots[0]);
+                res = res.concat(dots);
+            } else if (pa0 == "U") {
+                res.pop();
+                res = res.concat(ellipsePath(x, y, pa[1], pa[2], pa[3]));
+                r = ["U"].concat(res[res.length - 1].slice(-2));
+            } else {
+                for (var k = 0, kk = pa.length; k < kk; k++) {
+                    r[k] = pa[k];
+                }
+            }
+            pa0 = pa0.toUpperCase();
+            if (pa0 != "O") {
+                switch (r[0]) {
+                    case "Z":
+                        x = +mx;
+                        y = +my;
+                        break;
+                    case "H":
+                        x = r[1];
+                        break;
+                    case "V":
+                        y = r[1];
+                        break;
+                    case "M":
+                        mx = r[r.length - 2];
+                        my = r[r.length - 1];
+                    default:
+                        x = r[r.length - 2];
+                        y = r[r.length - 1];
+                }
+            }
+        }
+        res.toString = toString;
+        pth.abs = pathClone(res);
+        return res;
+    }
+    function l2c(x1, y1, x2, y2) {
+        return [x1, y1, x2, y2, x2, y2];
+    }
+    function q2c(x1, y1, ax, ay, x2, y2) {
+        var _13 = 1 / 3,
+            _23 = 2 / 3;
+        return [
+                _13 * x1 + _23 * ax,
+                _13 * y1 + _23 * ay,
+                _13 * x2 + _23 * ax,
+                _13 * y2 + _23 * ay,
+                x2,
+                y2
+            ];
+    }
+    function a2c(x1, y1, rx, ry, angle, large_arc_flag, sweep_flag, x2, y2, recursive) {
+        // for more information of where this math came from visit:
+        // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
+        var _120 = PI * 120 / 180,
+            rad = PI / 180 * (+angle || 0),
+            res = [],
+            xy,
+            rotate = Snap._.cacher(function (x, y, rad) {
+                var X = x * math.cos(rad) - y * math.sin(rad),
+                    Y = x * math.sin(rad) + y * math.cos(rad);
+                return {x: X, y: Y};
+            });
+        if (!recursive) {
+            xy = rotate(x1, y1, -rad);
+            x1 = xy.x;
+            y1 = xy.y;
+            xy = rotate(x2, y2, -rad);
+            x2 = xy.x;
+            y2 = xy.y;
+            var cos = math.cos(PI / 180 * angle),
+                sin = math.sin(PI / 180 * angle),
+                x = (x1 - x2) / 2,
+                y = (y1 - y2) / 2;
+            var h = (x * x) / (rx * rx) + (y * y) / (ry * ry);
+            if (h > 1) {
+                h = math.sqrt(h);
+                rx = h * rx;
+                ry = h * ry;
+            }
+            var rx2 = rx * rx,
+                ry2 = ry * ry,
+                k = (large_arc_flag == sweep_flag ? -1 : 1) *
+                    math.sqrt(abs((rx2 * ry2 - rx2 * y * y - ry2 * x * x) / (rx2 * y * y + ry2 * x * x))),
+                cx = k * rx * y / ry + (x1 + x2) / 2,
+                cy = k * -ry * x / rx + (y1 + y2) / 2,
+                f1 = math.asin(((y1 - cy) / ry).toFixed(9)),
+                f2 = math.asin(((y2 - cy) / ry).toFixed(9));
+
+            f1 = x1 < cx ? PI - f1 : f1;
+            f2 = x2 < cx ? PI - f2 : f2;
+            f1 < 0 && (f1 = PI * 2 + f1);
+            f2 < 0 && (f2 = PI * 2 + f2);
+            if (sweep_flag && f1 > f2) {
+                f1 = f1 - PI * 2;
+            }
+            if (!sweep_flag && f2 > f1) {
+                f2 = f2 - PI * 2;
+            }
+        } else {
+            f1 = recursive[0];
+            f2 = recursive[1];
+            cx = recursive[2];
+            cy = recursive[3];
+        }
+        var df = f2 - f1;
+        if (abs(df) > _120) {
+            var f2old = f2,
+                x2old = x2,
+                y2old = y2;
+            f2 = f1 + _120 * (sweep_flag && f2 > f1 ? 1 : -1);
+            x2 = cx + rx * math.cos(f2);
+            y2 = cy + ry * math.sin(f2);
+            res = a2c(x2, y2, rx, ry, angle, 0, sweep_flag, x2old, y2old, [f2, f2old, cx, cy]);
+        }
+        df = f2 - f1;
+        var c1 = math.cos(f1),
+            s1 = math.sin(f1),
+            c2 = math.cos(f2),
+            s2 = math.sin(f2),
+            t = math.tan(df / 4),
+            hx = 4 / 3 * rx * t,
+            hy = 4 / 3 * ry * t,
+            m1 = [x1, y1],
+            m2 = [x1 + hx * s1, y1 - hy * c1],
+            m3 = [x2 + hx * s2, y2 - hy * c2],
+            m4 = [x2, y2];
+        m2[0] = 2 * m1[0] - m2[0];
+        m2[1] = 2 * m1[1] - m2[1];
+        if (recursive) {
+            return [m2, m3, m4].concat(res);
+        } else {
+            res = [m2, m3, m4].concat(res).join().split(",");
+            var newres = [];
+            for (var i = 0, ii = res.length; i < ii; i++) {
+                newres[i] = i % 2 ? rotate(res[i - 1], res[i], rad).y : rotate(res[i], res[i + 1], rad).x;
+            }
+            return newres;
+        }
+    }
+    function findDotAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t) {
+        var t1 = 1 - t;
+        return {
+            x: pow(t1, 3) * p1x + pow(t1, 2) * 3 * t * c1x + t1 * 3 * t * t * c2x + pow(t, 3) * p2x,
+            y: pow(t1, 3) * p1y + pow(t1, 2) * 3 * t * c1y + t1 * 3 * t * t * c2y + pow(t, 3) * p2y
+        };
+    }
+
+    // Returns bounding box of cubic bezier curve.
+    // Source: http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
+    // Original version: NISHIO Hirokazu
+    // Modifications: https://github.com/timo22345
+    function curveDim(x0, y0, x1, y1, x2, y2, x3, y3) {
+        var tvalues = [],
+            bounds = [[], []],
+            a, b, c, t, t1, t2, b2ac, sqrtb2ac;
+        for (var i = 0; i < 2; ++i) {
+            if (i == 0) {
+                b = 6 * x0 - 12 * x1 + 6 * x2;
+                a = -3 * x0 + 9 * x1 - 9 * x2 + 3 * x3;
+                c = 3 * x1 - 3 * x0;
+            } else {
+                b = 6 * y0 - 12 * y1 + 6 * y2;
+                a = -3 * y0 + 9 * y1 - 9 * y2 + 3 * y3;
+                c = 3 * y1 - 3 * y0;
+            }
+            if (abs(a) < 1e-12) {
+                if (abs(b) < 1e-12) {
+                    continue;
+                }
+                t = -c / b;
+                if (0 < t && t < 1) {
+                    tvalues.push(t);
+                }
+                continue;
+            }
+            b2ac = b * b - 4 * c * a;
+            sqrtb2ac = math.sqrt(b2ac);
+            if (b2ac < 0) {
+                continue;
+            }
+            t1 = (-b + sqrtb2ac) / (2 * a);
+            if (0 < t1 && t1 < 1) {
+                tvalues.push(t1);
+            }
+            t2 = (-b - sqrtb2ac) / (2 * a);
+            if (0 < t2 && t2 < 1) {
+                tvalues.push(t2);
+            }
+        }
+
+        var x, y, j = tvalues.length,
+            jlen = j,
+            mt;
+        while (j--) {
+            t = tvalues[j];
+            mt = 1 - t;
+            bounds[0][j] = (mt * mt * mt * x0) + (3 * mt * mt * t * x1) + (3 * mt * t * t * x2) + (t * t * t * x3);
+            bounds[1][j] = (mt * mt * mt * y0) + (3 * mt * mt * t * y1) + (3 * mt * t * t * y2) + (t * t * t * y3);
+        }
+
+        bounds[0][jlen] = x0;
+        bounds[1][jlen] = y0;
+        bounds[0][jlen + 1] = x3;
+        bounds[1][jlen + 1] = y3;
+        bounds[0].length = bounds[1].length = jlen + 2;
+
+
+        return {
+          min: {x: mmin.apply(0, bounds[0]), y: mmin.apply(0, bounds[1])},
+          max: {x: mmax.apply(0, bounds[0]), y: mmax.apply(0, bounds[1])}
+        };
+    }
+
+    function path2curve(path, path2) {
+        var pth = !path2 && paths(path);
+        if (!path2 && pth.curve) {
+            return pathClone(pth.curve);
+        }
+        var p = pathToAbsolute(path),
+            p2 = path2 && pathToAbsolute(path2),
+            attrs = {x: 0, y: 0, bx: 0, by: 0, X: 0, Y: 0, qx: null, qy: null},
+            attrs2 = {x: 0, y: 0, bx: 0, by: 0, X: 0, Y: 0, qx: null, qy: null},
+            processPath = function (path, d, pcom) {
+                var nx, ny;
+                if (!path) {
+                    return ["C", d.x, d.y, d.x, d.y, d.x, d.y];
+                }
+                !(path[0] in {T: 1, Q: 1}) && (d.qx = d.qy = null);
+                switch (path[0]) {
+                    case "M":
+                        d.X = path[1];
+                        d.Y = path[2];
+                        break;
+                    case "A":
+                        path = ["C"].concat(a2c.apply(0, [d.x, d.y].concat(path.slice(1))));
+                        break;
+                    case "S":
+                        if (pcom == "C" || pcom == "S") { // In "S" case we have to take into account, if the previous command is C/S.
+                            nx = d.x * 2 - d.bx;          // And reflect the previous
+                            ny = d.y * 2 - d.by;          // command's control point relative to the current point.
+                        }
+                        else {                            // or some else or nothing
+                            nx = d.x;
+                            ny = d.y;
+                        }
+                        path = ["C", nx, ny].concat(path.slice(1));
+                        break;
+                    case "T":
+                        if (pcom == "Q" || pcom == "T") { // In "T" case we have to take into account, if the previous command is Q/T.
+                            d.qx = d.x * 2 - d.qx;        // And make a reflection similar
+                            d.qy = d.y * 2 - d.qy;        // to case "S".
+                        }
+                        else {                            // or something else or nothing
+                            d.qx = d.x;
+                            d.qy = d.y;
+                        }
+                        path = ["C"].concat(q2c(d.x, d.y, d.qx, d.qy, path[1], path[2]));
+                        break;
+                    case "Q":
+                        d.qx = path[1];
+                        d.qy = path[2];
+                        path = ["C"].concat(q2c(d.x, d.y, path[1], path[2], path[3], path[4]));
+                        break;
+                    case "L":
+                        path = ["C"].concat(l2c(d.x, d.y, path[1], path[2]));
+                        break;
+                    case "H":
+                        path = ["C"].concat(l2c(d.x, d.y, path[1], d.y));
+                        break;
+                    case "V":
+                        path = ["C"].concat(l2c(d.x, d.y, d.x, path[1]));
+                        break;
+                    case "Z":
+                        path = ["C"].concat(l2c(d.x, d.y, d.X, d.Y));
+                        break;
+                }
+                return path;
+            },
+            fixArc = function (pp, i) {
+                if (pp[i].length > 7) {
+                    pp[i].shift();
+                    var pi = pp[i];
+                    while (pi.length) {
+                        pcoms1[i] = "A"; // if created multiple C:s, their original seg is saved
+                        p2 && (pcoms2[i] = "A"); // the same as above
+                        pp.splice(i++, 0, ["C"].concat(pi.splice(0, 6)));
+                    }
+                    pp.splice(i, 1);
+                    ii = mmax(p.length, p2 && p2.length || 0);
+                }
+            },
+            fixM = function (path1, path2, a1, a2, i) {
+                if (path1 && path2 && path1[i][0] == "M" && path2[i][0] != "M") {
+                    path2.splice(i, 0, ["M", a2.x, a2.y]);
+                    a1.bx = 0;
+                    a1.by = 0;
+                    a1.x = path1[i][1];
+                    a1.y = path1[i][2];
+                    ii = mmax(p.length, p2 && p2.length || 0);
+                }
+            },
+            pcoms1 = [], // path commands of original path p
+            pcoms2 = [], // path commands of original path p2
+            pfirst = "", // temporary holder for original path command
+            pcom = ""; // holder for previous path command of original path
+        for (var i = 0, ii = mmax(p.length, p2 && p2.length || 0); i < ii; i++) {
+            p[i] && (pfirst = p[i][0]); // save current path command
+
+            if (pfirst != "C") // C is not saved yet, because it may be result of conversion
+            {
+                pcoms1[i] = pfirst; // Save current path command
+                i && ( pcom = pcoms1[i - 1]); // Get previous path command pcom
+            }
+            p[i] = processPath(p[i], attrs, pcom); // Previous path command is inputted to processPath
+
+            if (pcoms1[i] != "A" && pfirst == "C") pcoms1[i] = "C"; // A is the only command
+            // which may produce multiple C:s
+            // so we have to make sure that C is also C in original path
+
+            fixArc(p, i); // fixArc adds also the right amount of A:s to pcoms1
+
+            if (p2) { // the same procedures is done to p2
+                p2[i] && (pfirst = p2[i][0]);
+                if (pfirst != "C") {
+                    pcoms2[i] = pfirst;
+                    i && (pcom = pcoms2[i - 1]);
+                }
+                p2[i] = processPath(p2[i], attrs2, pcom);
+
+                if (pcoms2[i] != "A" && pfirst == "C") {
+                    pcoms2[i] = "C";
+                }
+
+                fixArc(p2, i);
+            }
+            fixM(p, p2, attrs, attrs2, i);
+            fixM(p2, p, attrs2, attrs, i);
+            var seg = p[i],
+                seg2 = p2 && p2[i],
+                seglen = seg.length,
+                seg2len = p2 && seg2.length;
+            attrs.x = seg[seglen - 2];
+            attrs.y = seg[seglen - 1];
+            attrs.bx = toFloat(seg[seglen - 4]) || attrs.x;
+            attrs.by = toFloat(seg[seglen - 3]) || attrs.y;
+            attrs2.bx = p2 && (toFloat(seg2[seg2len - 4]) || attrs2.x);
+            attrs2.by = p2 && (toFloat(seg2[seg2len - 3]) || attrs2.y);
+            attrs2.x = p2 && seg2[seg2len - 2];
+            attrs2.y = p2 && seg2[seg2len - 1];
+        }
+        if (!p2) {
+            pth.curve = pathClone(p);
+        }
+        return p2 ? [p, p2] : p;
+    }
+    function mapPath(path, matrix) {
+        if (!matrix) {
+            return path;
+        }
+        var x, y, i, j, ii, jj, pathi;
+        path = path2curve(path);
+        for (i = 0, ii = path.length; i < ii; i++) {
+            pathi = path[i];
+            for (j = 1, jj = pathi.length; j < jj; j += 2) {
+                x = matrix.x(pathi[j], pathi[j + 1]);
+                y = matrix.y(pathi[j], pathi[j + 1]);
+                pathi[j] = x;
+                pathi[j + 1] = y;
+            }
+        }
+        return path;
+    }
+
+    // http://schepers.cc/getting-to-the-point
+    function catmullRom2bezier(crp, z) {
+        var d = [];
+        for (var i = 0, iLen = crp.length; iLen - 2 * !z > i; i += 2) {
+            var p = [
+                        {x: +crp[i - 2], y: +crp[i - 1]},
+                        {x: +crp[i],     y: +crp[i + 1]},
+                        {x: +crp[i + 2], y: +crp[i + 3]},
+                        {x: +crp[i + 4], y: +crp[i + 5]}
+                    ];
+            if (z) {
+                if (!i) {
+                    p[0] = {x: +crp[iLen - 2], y: +crp[iLen - 1]};
+                } else if (iLen - 4 == i) {
+                    p[3] = {x: +crp[0], y: +crp[1]};
+                } else if (iLen - 2 == i) {
+                    p[2] = {x: +crp[0], y: +crp[1]};
+                    p[3] = {x: +crp[2], y: +crp[3]};
+                }
+            } else {
+                if (iLen - 4 == i) {
+                    p[3] = p[2];
+                } else if (!i) {
+                    p[0] = {x: +crp[i], y: +crp[i + 1]};
+                }
+            }
+            d.push(["C",
+                  (-p[0].x + 6 * p[1].x + p[2].x) / 6,
+                  (-p[0].y + 6 * p[1].y + p[2].y) / 6,
+                  (p[1].x + 6 * p[2].x - p[3].x) / 6,
+                  (p[1].y + 6*p[2].y - p[3].y) / 6,
+                  p[2].x,
+                  p[2].y
+            ]);
+        }
+
+        return d;
+    }
+
+    // export
+    Snap.path = paths;
+
+    /*\
+     * Snap.path.getTotalLength
+     [ method ]
+     **
+     * Returns the length of the given path in pixels
+     **
+     - path (string) SVG path string
+     **
+     = (number) length
+    \*/
+    Snap.path.getTotalLength = getTotalLength;
+    /*\
+     * Snap.path.getPointAtLength
+     [ method ]
+     **
+     * Returns the coordinates of the point located at the given length along the given path
+     **
+     - path (string) SVG path string
+     - length (number) length, in pixels, from the start of the path, excluding non-rendering jumps
+     **
+     = (object) representation of the point:
+     o {
+     o     x: (number) x coordinate,
+     o     y: (number) y coordinate,
+     o     alpha: (number) angle of derivative
+     o }
+    \*/
+    Snap.path.getPointAtLength = getPointAtLength;
+    /*\
+     * Snap.path.getSubpath
+     [ method ]
+     **
+     * Returns the subpath of a given path between given start and end lengths
+     **
+     - path (string) SVG path string
+     - from (number) length, in pixels, from the start of the path to the start of the segment
+     - to (number) length, in pixels, from the start of the path to the end of the segment
+     **
+     = (string) path string definition for the segment
+    \*/
+    Snap.path.getSubpath = function (path, from, to) {
+        if (this.getTotalLength(path) - to < 1e-6) {
+            return getSubpathsAtLength(path, from).end;
+        }
+        var a = getSubpathsAtLength(path, to, 1);
+        return from ? getSubpathsAtLength(a, from).end : a;
+    };
+    /*\
+     * Element.getTotalLength
+     [ method ]
+     **
+     * Returns the length of the path in pixels (only works for `path` elements)
+     = (number) length
+    \*/
+    elproto.getTotalLength = function () {
+        if (this.node.getTotalLength) {
+            return this.node.getTotalLength();
+        }
+    };
+    // SIERRA Element.getPointAtLength()/Element.getTotalLength(): If a <path> is broken into different segments, is the jump distance to the new coordinates set by the _M_ or _m_ commands calculated as part of the path's total length?
+    /*\
+     * Element.getPointAtLength
+     [ method ]
+     **
+     * Returns coordinates of the point located at the given length on the given path (only works for `path` elements)
+     **
+     - length (number) length, in pixels, from the start of the path, excluding non-rendering jumps
+     **
+     = (object) representation of the point:
+     o {
+     o     x: (number) x coordinate,
+     o     y: (number) y coordinate,
+     o     alpha: (number) angle of derivative
+     o }
+    \*/
+    elproto.getPointAtLength = function (length) {
+        return getPointAtLength(this.attr("d"), length);
+    };
+    // SIERRA Element.getSubpath(): Similar to the problem for Element.getPointAtLength(). Unclear how this would work for a segmented path. Overall, the concept of _subpath_ and what I'm calling a _segment_ (series of non-_M_ or _Z_ commands) is unclear.
+    /*\
+     * Element.getSubpath
+     [ method ]
+     **
+     * Returns subpath of a given element from given start and end lengths (only works for `path` elements)
+     **
+     - from (number) length, in pixels, from the start of the path to the start of the segment
+     - to (number) length, in pixels, from the start of the path to the end of the segment
+     **
+     = (string) path string definition for the segment
+    \*/
+    elproto.getSubpath = function (from, to) {
+        return Snap.path.getSubpath(this.attr("d"), from, to);
+    };
+    Snap._.box = box;
+    /*\
+     * Snap.path.findDotsAtSegment
+     [ method ]
+     **
+     * Utility method
+     **
+     * Finds dot coordinates on the given cubic beziér curve at the given t
+     - p1x (number) x of the first point of the curve
+     - p1y (number) y of the first point of the curve
+     - c1x (number) x of the first anchor of the curve
+     - c1y (number) y of the first anchor of the curve
+     - c2x (number) x of the second anchor of the curve
+     - c2y (number) y of the second anchor of the curve
+     - p2x (number) x of the second point of the curve
+     - p2y (number) y of the second point of the curve
+     - t (number) position on the curve (0..1)
+     = (object) point information in format:
+     o {
+     o     x: (number) x coordinate of the point,
+     o     y: (number) y coordinate of the point,
+     o     m: {
+     o         x: (number) x coordinate of the left anchor,
+     o         y: (number) y coordinate of the left anchor
+     o     },
+     o     n: {
+     o         x: (number) x coordinate of the right anchor,
+     o         y: (number) y coordinate of the right anchor
+     o     },
+     o     start: {
+     o         x: (number) x coordinate of the start of the curve,
+     o         y: (number) y coordinate of the start of the curve
+     o     },
+     o     end: {
+     o         x: (number) x coordinate of the end of the curve,
+     o         y: (number) y coordinate of the end of the curve
+     o     },
+     o     alpha: (number) angle of the curve derivative at the point
+     o }
+    \*/
+    Snap.path.findDotsAtSegment = findDotsAtSegment;
+    /*\
+     * Snap.path.bezierBBox
+     [ method ]
+     **
+     * Utility method
+     **
+     * Returns the bounding box of a given cubic beziér curve
+     - p1x (number) x of the first point of the curve
+     - p1y (number) y of the first point of the curve
+     - c1x (number) x of the first anchor of the curve
+     - c1y (number) y of the first anchor of the curve
+     - c2x (number) x of the second anchor of the curve
+     - c2y (number) y of the second anchor of the curve
+     - p2x (number) x of the second point of the curve
+     - p2y (number) y of the second point of the curve
+     * or
+     - bez (array) array of six points for beziér curve
+     = (object) bounding box
+     o {
+     o     x: (number) x coordinate of the left top point of the box,
+     o     y: (number) y coordinate of the left top point of the box,
+     o     x2: (number) x coordinate of the right bottom point of the box,
+     o     y2: (number) y coordinate of the right bottom point of the box,
+     o     width: (number) width of the box,
+     o     height: (number) height of the box
+     o }
+    \*/
+    Snap.path.bezierBBox = bezierBBox;
+    /*\
+     * Snap.path.isPointInsideBBox
+     [ method ]
+     **
+     * Utility method
+     **
+     * Returns `true` if given point is inside bounding box
+     - bbox (string) bounding box
+     - x (string) x coordinate of the point
+     - y (string) y coordinate of the point
+     = (boolean) `true` if point is inside
+    \*/
+    Snap.path.isPointInsideBBox = isPointInsideBBox;
+    Snap.closest = function (x, y, X, Y) {
+        var r = 100,
+            b = box(x - r / 2, y - r / 2, r, r),
+            inside = [],
+            getter = X[0].hasOwnProperty("x") ? function (i) {
+                return {
+                    x: X[i].x,
+                    y: X[i].y
+                };
+            } : function (i) {
+                return {
+                    x: X[i],
+                    y: Y[i]
+                };
+            },
+            found = 0;
+        while (r <= 1e6 && !found) {
+            for (var i = 0, ii = X.length; i < ii; i++) {
+                var xy = getter(i);
+                if (isPointInsideBBox(b, xy.x, xy.y)) {
+                    found++;
+                    inside.push(xy);
+                    break;
+                }
+            }
+            if (!found) {
+                r *= 2;
+                b = box(x - r / 2, y - r / 2, r, r)
+            }
+        }
+        if (r == 1e6) {
+            return;
+        }
+        var len = Infinity,
+            res;
+        for (i = 0, ii = inside.length; i < ii; i++) {
+            var l = Snap.len(x, y, inside[i].x, inside[i].y);
+            if (len > l) {
+                len = l;
+                inside[i].len = l;
+                res = inside[i];
+            }
+        }
+        return res;
+    };
+    /*\
+     * Snap.path.isBBoxIntersect
+     [ method ]
+     **
+     * Utility method
+     **
+     * Returns `true` if two bounding boxes intersect
+     - bbox1 (string) first bounding box
+     - bbox2 (string) second bounding box
+     = (boolean) `true` if bounding boxes intersect
+    \*/
+    Snap.path.isBBoxIntersect = isBBoxIntersect;
+    /*\
+     * Snap.path.intersection
+     [ method ]
+     **
+     * Utility method
+     **
+     * Finds intersections of two paths
+     - path1 (string) path string
+     - path2 (string) path string
+     = (array) dots of intersection
+     o [
+     o     {
+     o         x: (number) x coordinate of the point,
+     o         y: (number) y coordinate of the point,
+     o         t1: (number) t value for segment of path1,
+     o         t2: (number) t value for segment of path2,
+     o         segment1: (number) order number for segment of path1,
+     o         segment2: (number) order number for segment of path2,
+     o         bez1: (array) eight coordinates representing beziér curve for the segment of path1,
+     o         bez2: (array) eight coordinates representing beziér curve for the segment of path2
+     o     }
+     o ]
+    \*/
+    Snap.path.intersection = pathIntersection;
+    Snap.path.intersectionNumber = pathIntersectionNumber;
+    /*\
+     * Snap.path.isPointInside
+     [ method ]
+     **
+     * Utility method
+     **
+     * Returns `true` if given point is inside a given closed path.
+     *
+     * Note: fill mode doesn’t affect the result of this method.
+     - path (string) path string
+     - x (number) x of the point
+     - y (number) y of the point
+     = (boolean) `true` if point is inside the path
+    \*/
+    Snap.path.isPointInside = isPointInsidePath;
+    /*\
+     * Snap.path.getBBox
+     [ method ]
+     **
+     * Utility method
+     **
+     * Returns the bounding box of a given path
+     - path (string) path string
+     = (object) bounding box
+     o {
+     o     x: (number) x coordinate of the left top point of the box,
+     o     y: (number) y coordinate of the left top point of the box,
+     o     x2: (number) x coordinate of the right bottom point of the box,
+     o     y2: (number) y coordinate of the right bottom point of the box,
+     o     width: (number) width of the box,
+     o     height: (number) height of the box
+     o }
+    \*/
+    Snap.path.getBBox = pathBBox;
+    Snap.path.get = getPath;
+    /*\
+     * Snap.path.toRelative
+     [ method ]
+     **
+     * Utility method
+     **
+     * Converts path coordinates into relative values
+     - path (string) path string
+     = (array) path string
+    \*/
+    Snap.path.toRelative = pathToRelative;
+    /*\
+     * Snap.path.toAbsolute
+     [ method ]
+     **
+     * Utility method
+     **
+     * Converts path coordinates into absolute values
+     - path (string) path string
+     = (array) path string
+    \*/
+    Snap.path.toAbsolute = pathToAbsolute;
+    /*\
+     * Snap.path.toCubic
+     [ method ]
+     **
+     * Utility method
+     **
+     * Converts path to a new path where all segments are cubic beziér curves
+     - pathString (string|array) path string or array of segments
+     = (array) array of segments
+    \*/
+    Snap.path.toCubic = path2curve;
+    /*\
+     * Snap.path.map
+     [ method ]
+     **
+     * Transform the path string with the given matrix
+     - path (string) path string
+     - matrix (object) see @Matrix
+     = (string) transformed path string
+    \*/
+    Snap.path.map = mapPath;
+    Snap.path.toString = toString;
+    Snap.path.clone = pathClone;
+});
+
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob) {
+    var mmax = Math.max,
+        mmin = Math.min;
+
+    // Set
+    var Set = function (items) {
+        this.items = [];
+	this.bindings = {};
+        this.length = 0;
+        this.type = "set";
+        if (items) {
+            for (var i = 0, ii = items.length; i < ii; i++) {
+                if (items[i]) {
+                    this[this.items.length] = this.items[this.items.length] = items[i];
+                    this.length++;
+                }
+            }
+        }
+    },
+    setproto = Set.prototype;
+    /*\
+     * Set.push
+     [ method ]
+     **
+     * Adds each argument to the current set
+     = (object) original element
+    \*/
+    setproto.push = function () {
+        var item,
+            len;
+        for (var i = 0, ii = arguments.length; i < ii; i++) {
+            item = arguments[i];
+            if (item) {
+                len = this.items.length;
+                this[len] = this.items[len] = item;
+                this.length++;
+            }
+        }
+        return this;
+    };
+    /*\
+     * Set.pop
+     [ method ]
+     **
+     * Removes last element and returns it
+     = (object) element
+    \*/
+    setproto.pop = function () {
+        this.length && delete this[this.length--];
+        return this.items.pop();
+    };
+    /*\
+     * Set.forEach
+     [ method ]
+     **
+     * Executes given function for each element in the set
+     *
+     * If the function returns `false`, the loop stops running.
+     **
+     - callback (function) function to run
+     - thisArg (object) context object for the callback
+     = (object) Set object
+    \*/
+    setproto.forEach = function (callback, thisArg) {
+        for (var i = 0, ii = this.items.length; i < ii; i++) {
+            if (callback.call(thisArg, this.items[i], i) === false) {
+                return this;
+            }
+        }
+        return this;
+    };
+    /*\
+     * Set.animate
+     [ method ]
+     **
+     * Animates each element in set in sync.
+     *
+     **
+     - attrs (object) key-value pairs of destination attributes
+     - duration (number) duration of the animation in milliseconds
+     - easing (function) #optional easing function from @mina or custom
+     - callback (function) #optional callback function that executes when the animation ends
+     * or
+     - animation (array) array of animation parameter for each element in set in format `[attrs, duration, easing, callback]`
+     > Usage
+     | // animate all elements in set to radius 10
+     | set.animate({r: 10}, 500, mina.easein);
+     | // or
+     | // animate first element to radius 10, but second to radius 20 and in different time
+     | set.animate([{r: 10}, 500, mina.easein], [{r: 20}, 1500, mina.easein]);
+     = (Element) the current element
+    \*/
+    setproto.animate = function (attrs, ms, easing, callback) {
+        if (typeof easing == "function" && !easing.length) {
+            callback = easing;
+            easing = mina.linear;
+        }
+        if (attrs instanceof Snap._.Animation) {
+            callback = attrs.callback;
+            easing = attrs.easing;
+            ms = easing.dur;
+            attrs = attrs.attr;
+        }
+        var args = arguments;
+        if (Snap.is(attrs, "array") && Snap.is(args[args.length - 1], "array")) {
+            var each = true;
+        }
+        var begin,
+            handler = function () {
+                if (begin) {
+                    this.b = begin;
+                } else {
+                    begin = this.b;
+                }
+            },
+            cb = 0,
+            set = this,
+            callbacker = callback && function () {
+                if (++cb == set.length) {
+                    callback.call(this);
+                }
+            };
+        return this.forEach(function (el, i) {
+            eve.once("snap.animcreated." + el.id, handler);
+            if (each) {
+                args[i] && el.animate.apply(el, args[i]);
+            } else {
+                el.animate(attrs, ms, easing, callbacker);
+            }
+        });
+    };
+    setproto.remove = function () {
+        while (this.length) {
+            this.pop().remove();
+        }
+        return this;
+    };
+    /*\
+     * Set.bind
+     [ method ]
+     **
+     * Specifies how to handle a specific attribute when applied
+     * to a set.
+     *
+     **
+     - attr (string) attribute name
+     - callback (function) function to run
+     * or
+     - attr (string) attribute name
+     - element (Element) specific element in the set to apply the attribute to
+     * or
+     - attr (string) attribute name
+     - element (Element) specific element in the set to apply the attribute to
+     - eattr (string) attribute on the element to bind the attribute to
+     = (object) Set object
+    \*/
+    setproto.bind = function (attr, a, b) {
+        var data = {};
+        if (typeof a == "function") {
+            this.bindings[attr] = a;
+        } else {
+            var aname = b || attr;
+            this.bindings[attr] = function (v) {
+                data[aname] = v;
+                a.attr(data);
+            };
+        }
+        return this;
+    };
+    setproto.attr = function (value) {
+        var unbound = {};
+        for (var k in value) {
+            if (this.bindings[k]) {
+                this.bindings[k](value[k]);
+            } else {
+                unbound[k] = value[k];
+            }
+        }
+        for (var i = 0, ii = this.items.length; i < ii; i++) {
+            this.items[i].attr(unbound);
+        }
+        return this;
+    };
+    /*\
+     * Set.clear
+     [ method ]
+     **
+     * Removes all elements from the set
+    \*/
+    setproto.clear = function () {
+        while (this.length) {
+            this.pop();
+        }
+    };
+    /*\
+     * Set.splice
+     [ method ]
+     **
+     * Removes range of elements from the set
+     **
+     - index (number) position of the deletion
+     - count (number) number of element to remove
+     - insertion… (object) #optional elements to insert
+     = (object) set elements that were deleted
+    \*/
+    setproto.splice = function (index, count, insertion) {
+        index = index < 0 ? mmax(this.length + index, 0) : index;
+        count = mmax(0, mmin(this.length - index, count));
+        var tail = [],
+            todel = [],
+            args = [],
+            i;
+        for (i = 2; i < arguments.length; i++) {
+            args.push(arguments[i]);
+        }
+        for (i = 0; i < count; i++) {
+            todel.push(this[index + i]);
+        }
+        for (; i < this.length - index; i++) {
+            tail.push(this[index + i]);
+        }
+        var arglen = args.length;
+        for (i = 0; i < arglen + tail.length; i++) {
+            this.items[index + i] = this[index + i] = i < arglen ? args[i] : tail[i - arglen];
+        }
+        i = this.items.length = this.length -= count - arglen;
+        while (this[i]) {
+            delete this[i++];
+        }
+        return new Set(todel);
+    };
+    /*\
+     * Set.exclude
+     [ method ]
+     **
+     * Removes given element from the set
+     **
+     - element (object) element to remove
+     = (boolean) `true` if object was found and removed from the set
+    \*/
+    setproto.exclude = function (el) {
+        for (var i = 0, ii = this.length; i < ii; i++) if (this[i] == el) {
+            this.splice(i, 1);
+            return true;
+        }
+        return false;
+    };
+    setproto.insertAfter = function (el) {
+        var i = this.items.length;
+        while (i--) {
+            this.items[i].insertAfter(el);
+        }
+        return this;
+    };
+    setproto.getBBox = function () {
+        var x = [],
+            y = [],
+            x2 = [],
+            y2 = [];
+        for (var i = this.items.length; i--;) if (!this.items[i].removed) {
+            var box = this.items[i].getBBox();
+            x.push(box.x);
+            y.push(box.y);
+            x2.push(box.x + box.width);
+            y2.push(box.y + box.height);
+        }
+        x = mmin.apply(0, x);
+        y = mmin.apply(0, y);
+        x2 = mmax.apply(0, x2);
+        y2 = mmax.apply(0, y2);
+        return {
+            x: x,
+            y: y,
+            x2: x2,
+            y2: y2,
+            width: x2 - x,
+            height: y2 - y,
+            cx: x + (x2 - x) / 2,
+            cy: y + (y2 - y) / 2
+        };
+    };
+    setproto.clone = function (s) {
+        s = new Set;
+        for (var i = 0, ii = this.items.length; i < ii; i++) {
+            s.push(this.items[i].clone());
+        }
+        return s;
+    };
+    setproto.toString = function () {
+        return "Snap\u2018s set";
+    };
+    setproto.type = "set";
+    // export
+    Snap.Set = Set;
+    Snap.set = function () {
+        var set = new Set;
+        if (arguments.length) {
+            set.push.apply(set, Array.prototype.slice.call(arguments, 0));
+        }
+        return set;
+    };
+});
+
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob) {
+    var names = {},
+        reUnit = /[a-z]+$/i,
+        Str = String;
+    names.stroke = names.fill = "colour";
+    function getEmpty(item) {
+        var l = item[0];
+        switch (l.toLowerCase()) {
+            case "t": return [l, 0, 0];
+            case "m": return [l, 1, 0, 0, 1, 0, 0];
+            case "r": if (item.length == 4) {
+                return [l, 0, item[2], item[3]];
+            } else {
+                return [l, 0];
+            }
+            case "s": if (item.length == 5) {
+                return [l, 1, 1, item[3], item[4]];
+            } else if (item.length == 3) {
+                return [l, 1, 1];
+            } else {
+                return [l, 1];
+            }
+        }
+    }
+    function equaliseTransform(t1, t2, getBBox) {
+        t2 = Str(t2).replace(/\.{3}|\u2026/g, t1);
+        t1 = Snap.parseTransformString(t1) || [];
+        t2 = Snap.parseTransformString(t2) || [];
+        var maxlength = Math.max(t1.length, t2.length),
+            from = [],
+            to = [],
+            i = 0, j, jj,
+            tt1, tt2;
+        for (; i < maxlength; i++) {
+            tt1 = t1[i] || getEmpty(t2[i]);
+            tt2 = t2[i] || getEmpty(tt1);
+            if ((tt1[0] != tt2[0]) ||
+                (tt1[0].toLowerCase() == "r" && (tt1[2] != tt2[2] || tt1[3] != tt2[3])) ||
+                (tt1[0].toLowerCase() == "s" && (tt1[3] != tt2[3] || tt1[4] != tt2[4]))
+                ) {
+                    t1 = Snap._.transform2matrix(t1, getBBox());
+                    t2 = Snap._.transform2matrix(t2, getBBox());
+                    from = [["m", t1.a, t1.b, t1.c, t1.d, t1.e, t1.f]];
+                    to = [["m", t2.a, t2.b, t2.c, t2.d, t2.e, t2.f]];
+                    break;
+            }
+            from[i] = [];
+            to[i] = [];
+            for (j = 0, jj = Math.max(tt1.length, tt2.length); j < jj; j++) {
+                j in tt1 && (from[i][j] = tt1[j]);
+                j in tt2 && (to[i][j] = tt2[j]);
+            }
+        }
+        return {
+            from: path2array(from),
+            to: path2array(to),
+            f: getPath(from)
+        };
+    }
+    function getNumber(val) {
+        return val;
+    }
+    function getUnit(unit) {
+        return function (val) {
+            return +val.toFixed(3) + unit;
+        };
+    }
+    function getViewBox(val) {
+        return val.join(" ");
+    }
+    function getColour(clr) {
+        return Snap.rgb(clr[0], clr[1], clr[2]);
+    }
+    function getPath(path) {
+        var k = 0, i, ii, j, jj, out, a, b = [];
+        for (i = 0, ii = path.length; i < ii; i++) {
+            out = "[";
+            a = ['"' + path[i][0] + '"'];
+            for (j = 1, jj = path[i].length; j < jj; j++) {
+                a[j] = "val[" + (k++) + "]";
+            }
+            out += a + "]";
+            b[i] = out;
+        }
+        return Function("val", "return Snap.path.toString.call([" + b + "])");
+    }
+    function path2array(path) {
+        var out = [];
+        for (var i = 0, ii = path.length; i < ii; i++) {
+            for (var j = 1, jj = path[i].length; j < jj; j++) {
+                out.push(path[i][j]);
+            }
+        }
+        return out;
+    }
+    function isNumeric(obj) {
+        return isFinite(parseFloat(obj));
+    }
+    function arrayEqual(arr1, arr2) {
+        if (!Snap.is(arr1, "array") || !Snap.is(arr2, "array")) {
+            return false;
+        }
+        return arr1.toString() == arr2.toString();
+    }
+    Element.prototype.equal = function (name, b) {
+        return eve("snap.util.equal", this, name, b).firstDefined();
+    };
+    eve.on("snap.util.equal", function (name, b) {
+        var A, B, a = Str(this.attr(name) || ""),
+            el = this;
+        if (isNumeric(a) && isNumeric(b)) {
+            return {
+                from: parseFloat(a),
+                to: parseFloat(b),
+                f: getNumber
+            };
+        }
+        if (names[name] == "colour") {
+            A = Snap.color(a);
+            B = Snap.color(b);
+            return {
+                from: [A.r, A.g, A.b, A.opacity],
+                to: [B.r, B.g, B.b, B.opacity],
+                f: getColour
+            };
+        }
+        if (name == "viewBox") {
+            A = this.attr(name).vb.split(" ").map(Number);
+            B = b.split(" ").map(Number);
+            return {
+                from: A,
+                to: B,
+                f: getViewBox
+            };
+        }
+        if (name == "transform" || name == "gradientTransform" || name == "patternTransform") {
+            if (b instanceof Snap.Matrix) {
+                b = b.toTransformString();
+            }
+            if (!Snap._.rgTransform.test(b)) {
+                b = Snap._.svgTransform2string(b);
+            }
+            return equaliseTransform(a, b, function () {
+                return el.getBBox(1);
+            });
+        }
+        if (name == "d" || name == "path") {
+            A = Snap.path.toCubic(a, b);
+            return {
+                from: path2array(A[0]),
+                to: path2array(A[1]),
+                f: getPath(A[0])
+            };
+        }
+        if (name == "points") {
+            A = Str(a).split(Snap._.separator);
+            B = Str(b).split(Snap._.separator);
+            return {
+                from: A,
+                to: B,
+                f: function (val) { return val; }
+            };
+        }
+        var aUnit = a.match(reUnit),
+            bUnit = Str(b).match(reUnit);
+        if (aUnit && arrayEqual(aUnit, bUnit)) {
+            return {
+                from: parseFloat(a),
+                to: parseFloat(b),
+                f: getUnit(aUnit)
+            };
+        } else {
+            return {
+                from: this.asPX(name),
+                to: this.asPX(name, b),
+                f: getNumber
+            };
+        }
+    });
+});
+
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob) {
+    var elproto = Element.prototype,
+    has = "hasOwnProperty",
+    supportsTouch = "createTouch" in glob.doc,
+    events = [
+        "click", "dblclick", "mousedown", "mousemove", "mouseout",
+        "mouseover", "mouseup", "touchstart", "touchmove", "touchend",
+        "touchcancel"
+    ],
+    touchMap = {
+        mousedown: "touchstart",
+        mousemove: "touchmove",
+        mouseup: "touchend"
+    },
+    getScroll = function (xy, el) {
+        var name = xy == "y" ? "scrollTop" : "scrollLeft",
+            doc = el && el.node ? el.node.ownerDocument : glob.doc;
+        return doc[name in doc.documentElement ? "documentElement" : "body"][name];
+    },
+    preventDefault = function () {
+        this.returnValue = false;
+    },
+    preventTouch = function () {
+        return this.originalEvent.preventDefault();
+    },
+    stopPropagation = function () {
+        this.cancelBubble = true;
+    },
+    stopTouch = function () {
+        return this.originalEvent.stopPropagation();
+    },
+    addEvent = function (obj, type, fn, element) {
+        var realName = supportsTouch && touchMap[type] ? touchMap[type] : type,
+            f = function (e) {
+                var scrollY = getScroll("y", element),
+                    scrollX = getScroll("x", element);
+                if (supportsTouch && touchMap[has](type)) {
+                    for (var i = 0, ii = e.targetTouches && e.targetTouches.length; i < ii; i++) {
+                        if (e.targetTouches[i].target == obj || obj.contains(e.targetTouches[i].target)) {
+                            var olde = e;
+                            e = e.targetTouches[i];
+                            e.originalEvent = olde;
+                            e.preventDefault = preventTouch;
+                            e.stopPropagation = stopTouch;
+                            break;
+                        }
+                    }
+                }
+                var x = e.clientX + scrollX,
+                    y = e.clientY + scrollY;
+                return fn.call(element, e, x, y);
+            };
+
+        if (type !== realName) {
+            obj.addEventListener(type, f, false);
+        }
+
+        obj.addEventListener(realName, f, false);
+
+        return function () {
+            if (type !== realName) {
+                obj.removeEventListener(type, f, false);
+            }
+
+            obj.removeEventListener(realName, f, false);
+            return true;
+        };
+    },
+    drag = [],
+    dragMove = function (e) {
+        var x = e.clientX,
+            y = e.clientY,
+            scrollY = getScroll("y"),
+            scrollX = getScroll("x"),
+            dragi,
+            j = drag.length;
+        while (j--) {
+            dragi = drag[j];
+            if (supportsTouch) {
+                var i = e.touches && e.touches.length,
+                    touch;
+                while (i--) {
+                    touch = e.touches[i];
+                    if (touch.identifier == dragi.el._drag.id || dragi.el.node.contains(touch.target)) {
+                        x = touch.clientX;
+                        y = touch.clientY;
+                        (e.originalEvent ? e.originalEvent : e).preventDefault();
+                        break;
+                    }
+                }
+            } else {
+                e.preventDefault();
+            }
+            var node = dragi.el.node,
+                o,
+                next = node.nextSibling,
+                parent = node.parentNode,
+                display = node.style.display;
+            // glob.win.opera && parent.removeChild(node);
+            // node.style.display = "none";
+            // o = dragi.el.paper.getElementByPoint(x, y);
+            // node.style.display = display;
+            // glob.win.opera && (next ? parent.insertBefore(node, next) : parent.appendChild(node));
+            // o && eve("snap.drag.over." + dragi.el.id, dragi.el, o);
+            x += scrollX;
+            y += scrollY;
+            eve("snap.drag.move." + dragi.el.id, dragi.move_scope || dragi.el, x - dragi.el._drag.x, y - dragi.el._drag.y, x, y, e);
+        }
+    },
+    dragUp = function (e) {
+        Snap.unmousemove(dragMove).unmouseup(dragUp);
+        var i = drag.length,
+            dragi;
+        while (i--) {
+            dragi = drag[i];
+            dragi.el._drag = {};
+            eve("snap.drag.end." + dragi.el.id, dragi.end_scope || dragi.start_scope || dragi.move_scope || dragi.el, e);
+            eve.off("snap.drag.*." + dragi.el.id);
+        }
+        drag = [];
+    };
+    /*\
+     * Element.click
+     [ method ]
+     **
+     * Adds a click event handler to the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    /*\
+     * Element.unclick
+     [ method ]
+     **
+     * Removes a click event handler from the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+
+    /*\
+     * Element.dblclick
+     [ method ]
+     **
+     * Adds a double click event handler to the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    /*\
+     * Element.undblclick
+     [ method ]
+     **
+     * Removes a double click event handler from the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+
+    /*\
+     * Element.mousedown
+     [ method ]
+     **
+     * Adds a mousedown event handler to the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    /*\
+     * Element.unmousedown
+     [ method ]
+     **
+     * Removes a mousedown event handler from the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+
+    /*\
+     * Element.mousemove
+     [ method ]
+     **
+     * Adds a mousemove event handler to the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    /*\
+     * Element.unmousemove
+     [ method ]
+     **
+     * Removes a mousemove event handler from the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+
+    /*\
+     * Element.mouseout
+     [ method ]
+     **
+     * Adds a mouseout event handler to the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    /*\
+     * Element.unmouseout
+     [ method ]
+     **
+     * Removes a mouseout event handler from the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+
+    /*\
+     * Element.mouseover
+     [ method ]
+     **
+     * Adds a mouseover event handler to the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    /*\
+     * Element.unmouseover
+     [ method ]
+     **
+     * Removes a mouseover event handler from the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+
+    /*\
+     * Element.mouseup
+     [ method ]
+     **
+     * Adds a mouseup event handler to the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    /*\
+     * Element.unmouseup
+     [ method ]
+     **
+     * Removes a mouseup event handler from the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+
+    /*\
+     * Element.touchstart
+     [ method ]
+     **
+     * Adds a touchstart event handler to the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    /*\
+     * Element.untouchstart
+     [ method ]
+     **
+     * Removes a touchstart event handler from the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+
+    /*\
+     * Element.touchmove
+     [ method ]
+     **
+     * Adds a touchmove event handler to the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    /*\
+     * Element.untouchmove
+     [ method ]
+     **
+     * Removes a touchmove event handler from the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+
+    /*\
+     * Element.touchend
+     [ method ]
+     **
+     * Adds a touchend event handler to the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    /*\
+     * Element.untouchend
+     [ method ]
+     **
+     * Removes a touchend event handler from the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+
+    /*\
+     * Element.touchcancel
+     [ method ]
+     **
+     * Adds a touchcancel event handler to the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    /*\
+     * Element.untouchcancel
+     [ method ]
+     **
+     * Removes a touchcancel event handler from the element
+     - handler (function) handler for the event
+     = (object) @Element
+    \*/
+    for (var i = events.length; i--;) {
+        (function (eventName) {
+            Snap[eventName] = elproto[eventName] = function (fn, scope) {
+                if (Snap.is(fn, "function")) {
+                    this.events = this.events || [];
+                    this.events.push({
+                        name: eventName,
+                        f: fn,
+                        unbind: addEvent(this.node || document, eventName, fn, scope || this)
+                    });
+                } else {
+                    for (var i = 0, ii = this.events.length; i < ii; i++) if (this.events[i].name == eventName) {
+                        try {
+                            this.events[i].f.call(this);
+                        } catch (e) {}
+                    }
+                }
+                return this;
+            };
+            Snap["un" + eventName] =
+            elproto["un" + eventName] = function (fn) {
+                var events = this.events || [],
+                    l = events.length;
+                while (l--) if (events[l].name == eventName &&
+                               (events[l].f == fn || !fn)) {
+                    events[l].unbind();
+                    events.splice(l, 1);
+                    !events.length && delete this.events;
+                    return this;
+                }
+                return this;
+            };
+        })(events[i]);
+    }
+    /*\
+     * Element.hover
+     [ method ]
+     **
+     * Adds hover event handlers to the element
+     - f_in (function) handler for hover in
+     - f_out (function) handler for hover out
+     - icontext (object) #optional context for hover in handler
+     - ocontext (object) #optional context for hover out handler
+     = (object) @Element
+    \*/
+    elproto.hover = function (f_in, f_out, scope_in, scope_out) {
+        return this.mouseover(f_in, scope_in).mouseout(f_out, scope_out || scope_in);
+    };
+    /*\
+     * Element.unhover
+     [ method ]
+     **
+     * Removes hover event handlers from the element
+     - f_in (function) handler for hover in
+     - f_out (function) handler for hover out
+     = (object) @Element
+    \*/
+    elproto.unhover = function (f_in, f_out) {
+        return this.unmouseover(f_in).unmouseout(f_out);
+    };
+    var draggable = [];
+    // SIERRA unclear what _context_ refers to for starting, ending, moving the drag gesture.
+    // SIERRA Element.drag(): _x position of the mouse_: Where are the x/y values offset from?
+    // SIERRA Element.drag(): much of this member's doc appears to be duplicated for some reason.
+    // SIERRA Unclear about this sentence: _Additionally following drag events will be triggered: drag.start.<id> on start, drag.end.<id> on end and drag.move.<id> on every move._ Is there a global _drag_ object to which you can assign handlers keyed by an element's ID?
+    /*\
+     * Element.drag
+     [ method ]
+     **
+     * Adds event handlers for an element's drag gesture
+     **
+     - onmove (function) handler for moving
+     - onstart (function) handler for drag start
+     - onend (function) handler for drag end
+     - mcontext (object) #optional context for moving handler
+     - scontext (object) #optional context for drag start handler
+     - econtext (object) #optional context for drag end handler
+     * Additionaly following `drag` events are triggered: `drag.start.<id>` on start,
+     * `drag.end.<id>` on end and `drag.move.<id>` on every move. When element is dragged over another element
+     * `drag.over.<id>` fires as well.
+     *
+     * Start event and start handler are called in specified context or in context of the element with following parameters:
+     o x (number) x position of the mouse
+     o y (number) y position of the mouse
+     o event (object) DOM event object
+     * Move event and move handler are called in specified context or in context of the element with following parameters:
+     o dx (number) shift by x from the start point
+     o dy (number) shift by y from the start point
+     o x (number) x position of the mouse
+     o y (number) y position of the mouse
+     o event (object) DOM event object
+     * End event and end handler are called in specified context or in context of the element with following parameters:
+     o event (object) DOM event object
+     = (object) @Element
+    \*/
+    elproto.drag = function (onmove, onstart, onend, move_scope, start_scope, end_scope) {
+        var el = this;
+        if (!arguments.length) {
+            var origTransform;
+            return el.drag(function (dx, dy) {
+                this.attr({
+                    transform: origTransform + (origTransform ? "T" : "t") + [dx, dy]
+                });
+            }, function () {
+                origTransform = this.transform().local;
+            });
+        }
+        function start(e, x, y) {
+            (e.originalEvent || e).preventDefault();
+            el._drag.x = x;
+            el._drag.y = y;
+            el._drag.id = e.identifier;
+            !drag.length && Snap.mousemove(dragMove).mouseup(dragUp);
+            drag.push({el: el, move_scope: move_scope, start_scope: start_scope, end_scope: end_scope});
+            onstart && eve.on("snap.drag.start." + el.id, onstart);
+            onmove && eve.on("snap.drag.move." + el.id, onmove);
+            onend && eve.on("snap.drag.end." + el.id, onend);
+            eve("snap.drag.start." + el.id, start_scope || move_scope || el, x, y, e);
+        }
+        function init(e, x, y) {
+            eve("snap.draginit." + el.id, el, e, x, y);
+        }
+        eve.on("snap.draginit." + el.id, start);
+        el._drag = {};
+        draggable.push({el: el, start: start, init: init});
+        el.mousedown(init);
+        return el;
+    };
+    /*
+     * Element.onDragOver
+     [ method ]
+     **
+     * Shortcut to assign event handler for `drag.over.<id>` event, where `id` is the element's `id` (see @Element.id)
+     - f (function) handler for event, first argument would be the element you are dragging over
+    \*/
+    // elproto.onDragOver = function (f) {
+    //     f ? eve.on("snap.drag.over." + this.id, f) : eve.unbind("snap.drag.over." + this.id);
+    // };
+    /*\
+     * Element.undrag
+     [ method ]
+     **
+     * Removes all drag event handlers from the given element
+    \*/
+    elproto.undrag = function () {
+        var i = draggable.length;
+        while (i--) if (draggable[i].el == this) {
+            this.unmousedown(draggable[i].init);
+            draggable.splice(i, 1);
+            eve.unbind("snap.drag.*." + this.id);
+            eve.unbind("snap.draginit." + this.id);
+        }
+        !draggable.length && Snap.unmousemove(dragMove).unmouseup(dragUp);
+        return this;
+    };
+});
+
+// Copyright (c) 2013 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob) {
+    var elproto = Element.prototype,
+        pproto = Paper.prototype,
+        rgurl = /^\s*url\((.+)\)/,
+        Str = String,
+        $ = Snap._.$;
+    Snap.filter = {};
+    /*\
+     * Paper.filter
+     [ method ]
+     **
+     * Creates a `<filter>` element
+     **
+     - filstr (string) SVG fragment of filter provided as a string
+     = (object) @Element
+     * Note: It is recommended to use filters embedded into the page inside an empty SVG element.
+     > Usage
+     | var f = paper.filter('<feGaussianBlur stdDeviation="2"/>'),
+     |     c = paper.circle(10, 10, 10).attr({
+     |         filter: f
+     |     });
+    \*/
+    pproto.filter = function (filstr) {
+        var paper = this;
+        if (paper.type != "svg") {
+            paper = paper.paper;
+        }
+        var f = Snap.parse(Str(filstr)),
+            id = Snap._.id(),
+            width = paper.node.offsetWidth,
+            height = paper.node.offsetHeight,
+            filter = $("filter");
+        $(filter, {
+            id: id,
+            filterUnits: "userSpaceOnUse"
+        });
+        filter.appendChild(f.node);
+        paper.defs.appendChild(filter);
+        return new Element(filter);
+    };
+
+    eve.on("snap.util.getattr.filter", function () {
+        eve.stop();
+        var p = $(this.node, "filter");
+        if (p) {
+            var match = Str(p).match(rgurl);
+            return match && Snap.select(match[1]);
+        }
+    });
+    eve.on("snap.util.attr.filter", function (value) {
+        if (value instanceof Element && value.type == "filter") {
+            eve.stop();
+            var id = value.node.id;
+            if (!id) {
+                $(value.node, {id: value.id});
+                id = value.id;
+            }
+            $(this.node, {
+                filter: Snap.url(id)
+            });
+        }
+        if (!value || value == "none") {
+            eve.stop();
+            this.node.removeAttribute("filter");
+        }
+    });
+    /*\
+     * Snap.filter.blur
+     [ method ]
+     **
+     * Returns an SVG markup string for the blur filter
+     **
+     - x (number) amount of horizontal blur, in pixels
+     - y (number) #optional amount of vertical blur, in pixels
+     = (string) filter representation
+     > Usage
+     | var f = paper.filter(Snap.filter.blur(5, 10)),
+     |     c = paper.circle(10, 10, 10).attr({
+     |         filter: f
+     |     });
+    \*/
+    Snap.filter.blur = function (x, y) {
+        if (x == null) {
+            x = 2;
+        }
+        var def = y == null ? x : [x, y];
+        return Snap.format('\<feGaussianBlur stdDeviation="{def}"/>', {
+            def: def
+        });
+    };
+    Snap.filter.blur.toString = function () {
+        return this();
+    };
+    /*\
+     * Snap.filter.shadow
+     [ method ]
+     **
+     * Returns an SVG markup string for the shadow filter
+     **
+     - dx (number) #optional horizontal shift of the shadow, in pixels
+     - dy (number) #optional vertical shift of the shadow, in pixels
+     - blur (number) #optional amount of blur
+     - color (string) #optional color of the shadow
+     - opacity (number) #optional `0..1` opacity of the shadow
+     * or
+     - dx (number) #optional horizontal shift of the shadow, in pixels
+     - dy (number) #optional vertical shift of the shadow, in pixels
+     - color (string) #optional color of the shadow
+     - opacity (number) #optional `0..1` opacity of the shadow
+     * which makes blur default to `4`. Or
+     - dx (number) #optional horizontal shift of the shadow, in pixels
+     - dy (number) #optional vertical shift of the shadow, in pixels
+     - opacity (number) #optional `0..1` opacity of the shadow
+     = (string) filter representation
+     > Usage
+     | var f = paper.filter(Snap.filter.shadow(0, 2, 3)),
+     |     c = paper.circle(10, 10, 10).attr({
+     |         filter: f
+     |     });
+    \*/
+    Snap.filter.shadow = function (dx, dy, blur, color, opacity) {
+        if (typeof blur == "string") {
+            color = blur;
+            opacity = color;
+            blur = 4;
+        }
+        if (typeof color != "string") {
+            opacity = color;
+            color = "#000";
+        }
+        color = color || "#000";
+        if (blur == null) {
+            blur = 4;
+        }
+        if (opacity == null) {
+            opacity = 1;
+        }
+        if (dx == null) {
+            dx = 0;
+            dy = 2;
+        }
+        if (dy == null) {
+            dy = dx;
+        }
+        color = Snap.color(color);
+        return Snap.format('<feGaussianBlur in="SourceAlpha" stdDeviation="{blur}"/><feOffset dx="{dx}" dy="{dy}" result="offsetblur"/><feFlood flood-color="{color}"/><feComposite in2="offsetblur" operator="in"/><feComponentTransfer><feFuncA type="linear" slope="{opacity}"/></feComponentTransfer><feMerge><feMergeNode/><feMergeNode in="SourceGraphic"/></feMerge>', {
+            color: color,
+            dx: dx,
+            dy: dy,
+            blur: blur,
+            opacity: opacity
+        });
+    };
+    Snap.filter.shadow.toString = function () {
+        return this();
+    };
+    /*\
+     * Snap.filter.grayscale
+     [ method ]
+     **
+     * Returns an SVG markup string for the grayscale filter
+     **
+     - amount (number) amount of filter (`0..1`)
+     = (string) filter representation
+    \*/
+    Snap.filter.grayscale = function (amount) {
+        if (amount == null) {
+            amount = 1;
+        }
+        return Snap.format('<feColorMatrix type="matrix" values="{a} {b} {c} 0 0 {d} {e} {f} 0 0 {g} {b} {h} 0 0 0 0 0 1 0"/>', {
+            a: 0.2126 + 0.7874 * (1 - amount),
+            b: 0.7152 - 0.7152 * (1 - amount),
+            c: 0.0722 - 0.0722 * (1 - amount),
+            d: 0.2126 - 0.2126 * (1 - amount),
+            e: 0.7152 + 0.2848 * (1 - amount),
+            f: 0.0722 - 0.0722 * (1 - amount),
+            g: 0.2126 - 0.2126 * (1 - amount),
+            h: 0.0722 + 0.9278 * (1 - amount)
+        });
+    };
+    Snap.filter.grayscale.toString = function () {
+        return this();
+    };
+    /*\
+     * Snap.filter.sepia
+     [ method ]
+     **
+     * Returns an SVG markup string for the sepia filter
+     **
+     - amount (number) amount of filter (`0..1`)
+     = (string) filter representation
+    \*/
+    Snap.filter.sepia = function (amount) {
+        if (amount == null) {
+            amount = 1;
+        }
+        return Snap.format('<feColorMatrix type="matrix" values="{a} {b} {c} 0 0 {d} {e} {f} 0 0 {g} {h} {i} 0 0 0 0 0 1 0"/>', {
+            a: 0.393 + 0.607 * (1 - amount),
+            b: 0.769 - 0.769 * (1 - amount),
+            c: 0.189 - 0.189 * (1 - amount),
+            d: 0.349 - 0.349 * (1 - amount),
+            e: 0.686 + 0.314 * (1 - amount),
+            f: 0.168 - 0.168 * (1 - amount),
+            g: 0.272 - 0.272 * (1 - amount),
+            h: 0.534 - 0.534 * (1 - amount),
+            i: 0.131 + 0.869 * (1 - amount)
+        });
+    };
+    Snap.filter.sepia.toString = function () {
+        return this();
+    };
+    /*\
+     * Snap.filter.saturate
+     [ method ]
+     **
+     * Returns an SVG markup string for the saturate filter
+     **
+     - amount (number) amount of filter (`0..1`)
+     = (string) filter representation
+    \*/
+    Snap.filter.saturate = function (amount) {
+        if (amount == null) {
+            amount = 1;
+        }
+        return Snap.format('<feColorMatrix type="saturate" values="{amount}"/>', {
+            amount: 1 - amount
+        });
+    };
+    Snap.filter.saturate.toString = function () {
+        return this();
+    };
+    /*\
+     * Snap.filter.hueRotate
+     [ method ]
+     **
+     * Returns an SVG markup string for the hue-rotate filter
+     **
+     - angle (number) angle of rotation
+     = (string) filter representation
+    \*/
+    Snap.filter.hueRotate = function (angle) {
+        angle = angle || 0;
+        return Snap.format('<feColorMatrix type="hueRotate" values="{angle}"/>', {
+            angle: angle
+        });
+    };
+    Snap.filter.hueRotate.toString = function () {
+        return this();
+    };
+    /*\
+     * Snap.filter.invert
+     [ method ]
+     **
+     * Returns an SVG markup string for the invert filter
+     **
+     - amount (number) amount of filter (`0..1`)
+     = (string) filter representation
+    \*/
+    Snap.filter.invert = function (amount) {
+        if (amount == null) {
+            amount = 1;
+        }
+//        <feColorMatrix type="matrix" values="-1 0 0 0 1  0 -1 0 0 1  0 0 -1 0 1  0 0 0 1 0" color-interpolation-filters="sRGB"/>
+        return Snap.format('<feComponentTransfer><feFuncR type="table" tableValues="{amount} {amount2}"/><feFuncG type="table" tableValues="{amount} {amount2}"/><feFuncB type="table" tableValues="{amount} {amount2}"/></feComponentTransfer>', {
+            amount: amount,
+            amount2: 1 - amount
+        });
+    };
+    Snap.filter.invert.toString = function () {
+        return this();
+    };
+    /*\
+     * Snap.filter.brightness
+     [ method ]
+     **
+     * Returns an SVG markup string for the brightness filter
+     **
+     - amount (number) amount of filter (`0..1`)
+     = (string) filter representation
+    \*/
+    Snap.filter.brightness = function (amount) {
+        if (amount == null) {
+            amount = 1;
+        }
+        return Snap.format('<feComponentTransfer><feFuncR type="linear" slope="{amount}"/><feFuncG type="linear" slope="{amount}"/><feFuncB type="linear" slope="{amount}"/></feComponentTransfer>', {
+            amount: amount
+        });
+    };
+    Snap.filter.brightness.toString = function () {
+        return this();
+    };
+    /*\
+     * Snap.filter.contrast
+     [ method ]
+     **
+     * Returns an SVG markup string for the contrast filter
+     **
+     - amount (number) amount of filter (`0..1`)
+     = (string) filter representation
+    \*/
+    Snap.filter.contrast = function (amount) {
+        if (amount == null) {
+            amount = 1;
+        }
+        return Snap.format('<feComponentTransfer><feFuncR type="linear" slope="{amount}" intercept="{amount2}"/><feFuncG type="linear" slope="{amount}" intercept="{amount2}"/><feFuncB type="linear" slope="{amount}" intercept="{amount2}"/></feComponentTransfer>', {
+            amount: amount,
+            amount2: .5 - amount / 2
+        });
+    };
+    Snap.filter.contrast.toString = function () {
+        return this();
+    };
+});
+
+// Copyright (c) 2014 Adobe Systems Incorporated. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Snap.plugin(function (Snap, Element, Paper, glob, Fragment) {
+    var box = Snap._.box,
+        is = Snap.is,
+        firstLetter = /^[^a-z]*([tbmlrc])/i,
+        toString = function () {
+            return "T" + this.dx + "," + this.dy;
+        };
+    /*\
+     * Element.getAlign
+     [ method ]
+     **
+     * Returns shift needed to align the element relatively to given element.
+     * If no elements specified, parent `<svg>` container will be used.
+     - el (object) @optional alignment element
+     - way (string) one of six values: `"top"`, `"middle"`, `"bottom"`, `"left"`, `"center"`, `"right"`
+     = (object|string) Object in format `{dx: , dy: }` also has a string representation as a transformation string
+     > Usage
+     | el.transform(el.getAlign(el2, "top"));
+     * or
+     | var dy = el.getAlign(el2, "top").dy;
+    \*/
+    Element.prototype.getAlign = function (el, way) {
+        if (way == null && is(el, "string")) {
+            way = el;
+            el = null;
+        }
+        el = el || this.paper;
+        var bx = el.getBBox ? el.getBBox() : box(el),
+            bb = this.getBBox(),
+            out = {};
+        way = way && way.match(firstLetter);
+        way = way ? way[1].toLowerCase() : "c";
+        switch (way) {
+            case "t":
+                out.dx = 0;
+                out.dy = bx.y - bb.y;
+            break;
+            case "b":
+                out.dx = 0;
+                out.dy = bx.y2 - bb.y2;
+            break;
+            case "m":
+                out.dx = 0;
+                out.dy = bx.cy - bb.cy;
+            break;
+            case "l":
+                out.dx = bx.x - bb.x;
+                out.dy = 0;
+            break;
+            case "r":
+                out.dx = bx.x2 - bb.x2;
+                out.dy = 0;
+            break;
+            default:
+                out.dx = bx.cx - bb.cx;
+                out.dy = 0;
+            break;
+        }
+        out.toString = toString;
+        return out;
+    };
+    /*\
+     * Element.align
+     [ method ]
+     **
+     * Aligns the element relatively to given one via transformation.
+     * If no elements specified, parent `<svg>` container will be used.
+     - el (object) @optional alignment element
+     - way (string) one of six values: `"top"`, `"middle"`, `"bottom"`, `"left"`, `"center"`, `"right"`
+     = (object) this element
+     > Usage
+     | el.align(el2, "top");
+     * or
+     | el.align("middle");
+    \*/
+    Element.prototype.align = function (el, way) {
+        return this.transform("..." + this.getAlign(el, way));
+    };
+});
+
+return Snap;
+}));
diff --git a/web/pgadmin/misc/templates/explain/js/explain.js b/web/pgadmin/misc/templates/explain/js/explain.js
new file mode 100644
index 0000000..911e107
--- /dev/null
+++ b/web/pgadmin/misc/templates/explain/js/explain.js
@@ -0,0 +1,688 @@
+define (
+  'pgadmin.misc.explain',
+  ['jquery', 'underscore', 'underscore.string', 'pgadmin', 'backbone', 'snap.svg'],
+  function($, _, S, pgAdmin, Backbone, Snap) {
+
+pgAdmin = pgAdmin || window.pgAdmin || {};
+var pgExplain = pgAdmin.Explain;
+
+// Snap.svg plug-in to write multitext as image name
+Snap.plugin(function (Snap, Element, Paper, glob) {
+  Paper.prototype.multitext = function (x, y, txt, max_width, attributes) {
+    var svg = Snap(),
+        abc = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ",
+        isWordBroken = false,
+        temp = svg.text(0, 0, abc);
+
+    temp.attr(attributes);
+
+    /*
+     * Find letter width in pixels and
+     * index from where the text should be broken
+     */
+    var letter_width = temp.getBBox().width / abc.length,
+        word_break_index = Math.round((max_width / letter_width)) - 1;
+
+    svg.remove();
+
+    var words = txt.split(" "),
+        width_so_far = 0,
+        lines=[], curr_line = '',
+        /*
+         * Function to divide string into multiple lines
+         * and store them in an array if it size crosses
+         * the max-width boundary.
+         */
+        splitTextInMultiLine = function(leading, so_far, line) {
+          var l = line.length,
+              res = [];
+
+          if (l == 0)
+            return res;
+
+          if (so_far && (so_far + (l * letter_width) > max_width)) {
+            res.push(leading);
+            res = res.concat(splitTextInMultiLine('', 0, line));
+          } else if (so_far) {
+            res.push(leading + ' ' + line);
+          } else {
+            if (leading)
+                res.push(leading);
+            if (line.length > word_break_index + 1)
+                res.push(line.slice(0, word_break_index) + '-');
+            else
+                res.push(line);
+            res = res.concat(splitTextInMultiLine('', 0, line.slice(word_break_index)));
+          }
+
+          return res;
+        };
+
+    for (var i = 0; i < words.length; i++) {
+      var tmpArr = splitTextInMultiLine(
+            curr_line, width_so_far, words[i]
+          );
+
+      if (curr_line) {
+        lines = lines.slice(0, lines.length - 2);
+      }
+      lines = lines.concat(tmpArr);
+      curr_line = lines[lines.length - 1];
+      width_so_far = (curr_line.length * letter_width);
+    }
+
+    // Create multiple tspan for each string in array
+    var t = this.text(x,y,lines).attr(attributes);
+    t.selectAll("tspan:nth-child(n+2)").attr({
+      dy: "1.2em",
+      x: x
+    });
+    return t;
+  };
+});
+
+if (pgAdmin.Explain)
+    return pgAdmin.Explain;
+
+var pgExplain = pgAdmin.Explain = {
+   // Prefix path where images are stored
+   prefix: '{{ url_for('misc.static', filename='explain/img') }}/'
+};
+
+/*
+ * A map which is used to fetch the image to be drawn and
+ * text which will appear below it
+ */
+var imageMapper = {
+    "Aggregate" : {
+        "image":"ex_aggregate.png", "image_text":"Aggregate"
+    },
+    'Append' : {
+        "image":"ex_append.png","image_text":"Append"
+    },
+    "Bitmap Index Scan" : function(data) {
+        return {
+            "image":"ex_bmp_index.png", "image_text":data['Index Name']
+        };
+    },
+    "Bitmap Heap Scan" : function(data) {
+  return {"image":"ex_bmp_heap.png","image_text":data['Relation Name']};
+},
+"BitmapAnd" : {"image":"ex_bmp_and.png","image_text":"Bitmap AND"},
+"BitmapOr" : {"image":"ex_bmp_or.png","image_text":"Bitmap OR"},
+"CTE Scan" : {"image":"ex_cte_scan.png","image_text":"CTE Scan"},
+"Function Scan" : {"image":"ex_result.png","image_text":"Function Scan"},
+"Foreign Scan" : {"image":"ex_foreign_scan.png","image_text":"Foreign Scan"},
+"Gather" : {"image":"ex_gather_motion.png","image_text":"Gather"},
+"Group" : {"image":"ex_group.png","image_text":"Group"},
+"GroupAggregate": {"image":"ex_aggregate.png","image_text":"Group Aggregate"},
+"Hash" : {"image":"ex_hash.png","image_text":"Hash"},
+"Hash Join": function(data) {
+  if (!data['Join Type']) return {"image":"ex_join.png","image_text":"Join"};
+  switch(data['Join Type']) {
+    case 'Anti': return {"image":"ex_hash_anti_join.png","image_text":"Hash Anti Join"};
+    case 'Semi': return {"image":"ex_hash_semi_join.png","image_text":"Hash Semi Join"};
+    default: return {"image":"ex_hash.png","image_text":String("Hash " + data['Join Type'] + " Join" )};
+  }
+},
+"HashAggregate" : {"image":"ex_aggregate.png","image_text":"Hash Aggregate"},
+"Index Only Scan" : function(data) {
+  return {"image":"ex_index_only_scan.png","image_text":data['Index Name']};
+},
+"Index Scan" : function(data) {
+  return {"image":"ex_index_scan.png","image_text":data['Index Name']};
+},
+"Index Scan Backword" : {"image":"ex_index_scan.png","image_text":"Index Backward Scan"},
+"Limit" : {"image":"ex_limit.png","image_text":"Limit"},
+"LockRows" : {"image":"ex_lock_rows.png","image_text":"Lock Rows"},
+"Materialize" : {"image":"ex_materialize.png","image_text":"Materialize"},
+"Merge Append": {"image":"ex_merge_append.png","image_text":"Merge Append"},
+"Merge Join": function(data) {
+  switch(data['Join Type']) {
+    case 'Anti': return {"image":"ex_merge_anti_join.png","image_text":"Merge Anti Join"};
+    case 'Semi': return {"image":"ex_merge_semi_join.png","image_text":"Merge Semi Join"};
+    default: return {"image":"ex_merge.png","image_text":String("Merge " + data['Join Type'] + " Join" )};
+  }
+},
+"ModifyTable" : function(data) {
+  switch (data['Operaton']) {
+    case "insert": return { "image":"ex_insert.png",
+                            "image_text":"Insert"
+                           };
+    case "update": return {"image":"ex_update.png","image_text":"Update"};
+    case "Delete": return {"image":"ex_delete.png","image_text":"Delete"};
+  }
+},
+'Nested Loop' : function(data) {
+  switch(data['Join Type']) {
+    case 'Anti': return {"image":"ex_nested_loop_anti_join.png","image_text":"Nested Loop Anti Join"};
+    case 'Semi': return {"image":"ex_nested_loop_semi_join.png","image_text":"Nested Loop Semi Join"};
+    default: return {"image":"ex_nested.png","image_text":"Nested Loop " + data['Join Type'] + " Join"};
+  }
+},
+"Recursive Union" : {"image":"ex_recursive_union.png","image_text":"Recursive Union"},
+"Result" : {"image":"ex_result.png","image_text":"Result"},
+"Sample Scan" : {"image":"ex_scan.png","image_text":"Sample Scan"},
+"Scan" : {"image":"ex_scan.png","image_text":"Scan"},
+"Seek" : {"image":"ex_seek.png","image_text":"Seek"},
+"SetOp" : function(data) {
+  var strategy = data['Strategy'],
+      command = data['Command'];
+
+  if(strategy == "Hashed") {
+    if(command.startsWith("Intersect")) {
+      if(command == "Intersect All")
+        return {"image":"ex_hash_setop_intersect_all.png","image_text":"Hashed Intersect All"};
+      return {"image":"ex_hash_setop_intersect.png","image_text":"Hashed Intersect"};
+    }
+    else if (command.startsWith("Except")) {
+      if(command == "Except All")
+        return {"image":"ex_hash_setop_except_all.png","image_text":"Hashed Except All"};
+      return {"image":"ex_hash_setop_except.png","image_text":"Hash Except"};
+    }
+    return {"image":"ex_hash_setop_unknown.png","image_text":"Hashed SetOp Unknown"};
+  }
+  return {"image":"ex_setop.png","image_text":"SetOp"};
+},
+"Seq Scan": function(data) {
+  return {"image":"ex_scan.png","image_text":data['Relation Name']};
+},
+"Subquery Scan" : {"image":"ex_subplan.png","image_text":"SubQuery Scan"},
+"Sort" : {"image":"ex_sort.png","image_text":"Sort"},
+"Tid Scan" : {"image":"ex_tid_scan.png","image_text":"Tid Scan"},
+"Unique" : {"image":"ex_unique.png","image_text":"Unique"},
+"Values Scan" : {"image":"ex_values_scan.png","image_text":"Values Scan"},
+"WindowAgg" : {"image":"ex_window_aggregate.png","image_text":"Window Aggregate"},
+"WorkTable Scan" : {"image":"ex_worktable_scan.png","image_text":"WorkTable Scan"},
+"Undefined" : {"image":"ex_unknown.png","image_text":"Undefined"},
+}
+
+// Some predefined constants used to calculate image location and its border
+var pWIDTH = pHEIGHT = 100.
+    IMAGE_WIDTH = IMAGE_HEIGHT = 50;
+var offsetX = 200,
+    offsetY = 60;
+var ARROW_WIDTH = 10,
+    ARROW_HEIGHT = 10;
+var TXT_ALLIGN = 5,
+    TXT_SIZE = "15px";
+var TOTAL_WIDTH = undefined,
+    TOTAL_HEIGHT = undefined;
+var xMargin = 25,
+    yMargin = 25;
+var MIN_ZOOM_FACTOR = 0.01,
+    MAX_ZOOM_FACTOR = 2,
+    INIT_ZOOM_FACTOR = 1;
+    ZOOM_RATIO = 0.05;
+
+
+// Backbone model for each plan property of input JSON object
+var PlanModel = Backbone.Model.extend({
+    defaults: {
+        "Plans": [],
+        level: [],
+        "image": undefined,
+        "image_text": undefined,
+        xpos: undefined,
+        ypos: undefined,
+        width: pWIDTH,
+        height: pHEIGHT
+    },
+    parse: function(data) {
+        var idx = 1,
+            lvl = data.level = data.level || [idx],
+            plans = [],
+            node_type = data['Node Type'],
+            // Calculating relative xpos of current node from top node
+            xpos = data.xpos = data.xpos - pWIDTH,
+            // Calculating relative ypos of current node from top node
+            ypos = data.ypos,
+            maxChildWidth = 0;
+
+        data['width'] = pWIDTH;
+        data['height'] = pHEIGHT;
+
+        /*
+         * calculating xpos, ypos, width and height if current node is a subplan
+         */
+        if (data['Parent Relationship'] === "SubPlan") {
+            data['width'] += (xMargin * 2) + (xMargin / 2);
+            data['height'] += (yMargin * 2);
+            data['ypos'] += yMargin;
+            xpos -= xMargin;
+            ypos += yMargin;
+        }
+
+        if(node_type.startsWith("(slice"))
+            node_type = node_type.substring(0,7);
+
+        // Get the image information for current node
+        var mapperObj = (_.isFunction(imageMapper[node_type]) &&
+                imageMapper[node_type].apply(undefined, [data])) ||
+                imageMapper[node_type] || 'Undefined';
+
+        data["image"] = mapperObj["image"];
+        data["image_text"] = mapperObj["image_text"];
+
+        // Start calculating xpos, ypos, width and height for child plans if any
+        if ('Plans' in data) {
+
+            data['width'] += offsetX;
+
+            _.each(data['Plans'], function(p) {
+                var level = _.clone(lvl),
+                    plan = new PlanModel();
+
+                level.push(idx);
+                plan.set(plan.parse(_.extend(
+                    p, {
+                        "level": level,
+                        xpos: xpos - offsetX,
+                        ypos: ypos
+                    })));
+
+                if (maxChildWidth < plan.get('width')) {
+                    maxChildWidth = plan.get('width');
+                }
+
+                var childHeight = plan.get('height');
+
+                if (idx !== 1) {
+                    data['height'] = data['height'] + childHeight + offsetY;
+                } else if (childHeight > data['height']) {
+                    data['height'] = childHeight;
+                }
+                ypos += childHeight + offsetY;
+
+                plans.push(plan);
+                idx++;
+            });
+        }
+
+        // Final Width and Height of current node
+        data['width'] += maxChildWidth;
+        data['Plans'] = plans;
+
+        return data;
+    },
+
+    /*
+     * Required to parse and include non-default params of
+     * plan into backbone model
+     */
+    toJSON: function(non_recursive) {
+      var res = Backbone.Model.prototype.toJSON.apply(this, arguments);
+
+      if (non_recursive) {
+            delete res['Plans'];
+      } else {
+            var plans = [];
+            _.each(res['Plans'], function(p) {
+              plans.push(p.toJSON());
+            });
+            res['Plans'] = plans;
+      }
+      return res;
+    },
+
+    // Draw an arrow to parent node
+    drawPolyLine: function(g, startX, startY, endX, endY, opts, arrowOpts) {
+      // Calculate end point of first starting straight line (startx1, starty1)
+      // Calculate start point of 2nd straight line (endx1, endy1)
+      var midX1 = startX + ((endX - startX) / 3),
+          midX2 = startX + (2 * ((endX - startX) / 3));
+
+      //create arrow head
+      var arrow = g.polygon(
+                    [0, ARROW_HEIGHT,
+                    (ARROW_WIDTH / 2),ARROW_HEIGHT,
+                    (ARROW_HEIGHT / 4), 0,
+                    0, ARROW_WIDTH]
+                    ).transform("r90");
+      var marker = arrow.marker(
+                         0, 0, ARROW_WIDTH, ARROW_HEIGHT, 0, (ARROW_WIDTH / 2)
+                         ).attr(arrowOpts);
+
+      // First straight line
+      g.line(
+        startX, startY, midX1, startY
+        ).attr(opts);
+
+      // Diagonal line
+      g.line(
+        midX1-1, startY, midX2, endY
+        ).attr(opts);
+
+      // Last straight line
+      var line = g.line(
+                   midX2, endY, endX, endY
+                   ).attr(opts);
+      line.attr({markerEnd: marker})
+    },
+
+    // Draw image, its name and its tooltip
+    draw: function(s, xpos, ypos, pXpos, pYpos, graphContainer, toolTipContainer) {
+        var g = s.g();
+        var toolTipTable = {};
+        var currentXpos = xpos + this.get('xpos') ,
+            currentYpos = ypos + this.get('ypos'),
+            isSubPlan = (this.get('Parent Relationship') === "SubPlan");
+
+        // Draw the subplan rectangle
+        if (isSubPlan) {
+          g.rect(
+            currentXpos - this.get('width') + pWIDTH + xMargin,
+            currentYpos - yMargin,
+            this.get('width') - xMargin,
+            this.get('height'), 5
+          ).attr({
+              stroke: '#444444',
+              'strokeWidth': 1.2,
+              fill: 'gray',
+              fillOpacity: 0.2
+          });
+
+          //provide subplan name
+          var text = g.text(
+            currentXpos  + pWIDTH - ( this.get('width') / 2) - xMargin,
+            currentYpos + pHEIGHT  - (this.get('height') / 2) - yMargin,
+            this.get('Subplan Name')
+          ).attr({
+            fontSize: TXT_SIZE, "text-anchor":"start",
+            fill: 'red'
+          });
+        }
+
+        // Draw the actual image for current node
+        var image = g.image(
+            pgExplain.prefix + this.get('image'),
+            currentXpos + (pWIDTH - IMAGE_WIDTH) / 2,
+            currentYpos + (pHEIGHT - IMAGE_HEIGHT) / 2,
+            IMAGE_WIDTH,
+            IMAGE_HEIGHT
+        );
+
+        // Draw tooltip
+        var image_data = this.toJSON();
+        image.mouseover(function(evt){
+
+          // Empty the tooltip content if it has any and add new data
+          toolTipContainer.empty();
+          var tooltip = $('<table></table>',
+                           {
+                             class: "pgadmin-tooltip-table",
+                             style: "border-collapse: collapse; border-spacing: 1px; top: auto; left: auto;"
+                           }
+                         ).appendTo(toolTipContainer);
+          _.each(image_data, function(value,key) {
+            if(key !== 'image' && key !== 'Plans' &&
+               key !== 'level' && key !== 'image' &&
+               key !== 'image_text' && key !== 'xpos' &&
+               key !== 'ypos' && key !== 'width' &&
+               key !== 'height') {
+              tooltip.append( '<tr><td class="label explain-tooltip">' + key + '</td><td class="label explain-tooltip-val">' + value + '</td></tr>' );
+            };
+          });
+
+          var zoomFactor = graphContainer.data('zoom-factor');
+
+          // Calculate co-ordinates for tooltip
+          var toolTipX = ((currentXpos + pWIDTH) * zoomFactor - graphContainer.scrollLeft());
+          var toolTipY = ((currentYpos + pHEIGHT) * zoomFactor - graphContainer.scrollTop());
+
+          // Recalculate x.y if tooltip is going out of screen
+          if(graphContainer.width() < (toolTipX + toolTipContainer[0].clientWidth))
+            toolTipX -= (toolTipContainer[0].clientWidth + (pWIDTH*zoomFactor));
+          //if(document.children[0].clientHeight < (toolTipY + toolTipContainer[0].clientHeight))
+          if(graphContainer.height() < (toolTipY + toolTipContainer[0].clientHeight))
+            toolTipY -= (toolTipContainer[0].clientHeight + ((pHEIGHT/2)*zoomFactor));
+
+          toolTipX = toolTipX < 0 ? 0 : (toolTipX);
+          toolTipY = toolTipY < 0 ? 0 : (toolTipY);
+
+          // Show toolTip at respective x,y coordinates
+          toolTipContainer.css({'opacity': '0.8'});
+          toolTipContainer.css('left', toolTipX);
+          toolTipContainer.css( 'top', toolTipY);
+        });
+
+        // Remove tooltip when mouse is out from node's area
+        image.mouseout(function() {
+          toolTipContainer.empty();
+          toolTipContainer.css({'opacity': '0'});
+          toolTipContainer.css('left', 0);
+          toolTipContainer.css( 'top', 0);
+        });
+
+        // Draw text below the node
+        var label = g.g();
+        g.multitext(
+          currentXpos + (pWIDTH / 2),
+          currentYpos + pHEIGHT - TXT_ALLIGN,
+          this.get('image_text'),
+          150,
+          {"font-size": TXT_SIZE ,"text-anchor":"middle"}
+        );
+
+        // Draw Arrow to parent only its not the first node
+        if (!_.isUndefined(pYpos)) {
+            var startx = currentXpos + pWIDTH;
+            var starty = currentYpos + (pHEIGHT / 2);
+            var endx = pXpos - ARROW_WIDTH;
+            var endy = pYpos + (pHEIGHT / 2);
+            var start_cost = this.get("Startup Cost"),
+                total_cost = this.get("Total Cost");
+
+            // Calculate arrow width according to cost of a particular plan
+            var arrow_size = Math.round(Math.log((start_cost+total_cost)/2 + start_cost));
+            arrow_size = arrow_size < 1 ? 1 : arrow_size > 10 ? 10 : arrow_size;
+
+            var arrow_view_box = [0, 0, 2*ARROW_WIDTH, 2*ARROW_HEIGHT];
+            var opts = {stroke: "#000000", strokeWidth: arrow_size + 1},
+                subplanOpts = {stroke: "#866486", strokeWidth: arrow_size + 1},
+                arrowOpts = {viewBox: arrow_view_box.join(" ")};
+
+            // Draw an arrow from current node to its parent
+            this.drawPolyLine(
+              g, startx, starty, endx, endy,
+              isSubPlan ? subplanOpts : opts, arrowOpts
+            );
+        }
+
+        var plans = this.get('Plans');
+
+        // Draw nodes for current plan's children
+        _.each(plans, function(p) {
+            p.draw(s, xpos, ypos, currentXpos, currentYpos, graphContainer, toolTipContainer);
+        });
+    }
+});
+
+// Main backbone model to store JSON object
+var MainPlanModel = Backbone.Model.extend({
+    defaults: {
+        "Plan": undefined,
+        xpos: 0,
+        ypos: 0,
+    },
+    initialize: function() {
+        this.set("Plan", new PlanModel());
+    },
+
+    // Parse the JSON data and fetch its children plans
+    parse: function(data) {
+       if (data && 'Plan' in data) {
+            var plan = this.get("Plan");
+            plan.set(
+              plan.parse(
+                _.extend(
+                  data['Plan'], {
+                    xpos: 0,
+                    ypos: 0
+                  })));
+
+            data['xpos'] = 0;
+            data['ypos'] = 0;
+            data['width'] = plan.get('width') + (xMargin * 2);
+            data['height'] = plan.get('height') + (yMargin * 2);
+
+            delete data['Plan'];
+        }
+
+        return data;
+    },
+    toJSON: function() {
+      var res = Backbone.Model.prototype.toJSON.apply(this, arguments);
+
+      if (res.Plan) {
+        res.Plan = res.Plan.toJSON();
+      }
+
+      return res;
+    },
+    draw: function(s, xpos, ypos, graphContainer, toolTipContainer) {
+        var g = s.g();
+
+        //draw the border
+        g.rect(
+	        0, 0, this.get('width') - 10, this.get('height') - 10, 5
+	    ).attr({
+            stroke: '#FFEBCD', 'strokeWidth': 1.2,
+            fill: '#FFF8DC', fillOpacity: 0.5
+        });
+
+        //Fetch total width, height
+        TOTAL_WIDTH = this.get('width');
+        TOTAL_HEIGHT = this.get('height');
+        var plan = this.get('Plan');
+
+        //Draw explain graph
+        plan.draw(g, xpos, ypos, undefined, undefined, graphContainer, toolTipContainer);
+    }
+});
+
+// Parse and draw full graphical explain
+_.extend(
+    pgExplain, {
+        // Assumption container is a jQuery object
+        DrawJSONPlan: function(container, plan) {
+          var my_plans = [];
+          container.empty();
+          var curr_zoom_factor = 1.0;
+
+          var zoomArea =$('<div></div>', {
+                class: 'pg-explain-zoom-area btn-group',
+                role: 'group'
+                }).appendTo(container),
+              zoomInBtn = $('<button></button>', {
+                class: 'btn pg-explain-zoom-btn badge',
+                title: 'Zoom in'
+                }).appendTo(zoomArea).append(
+                  $('<i></i>',{
+                    class: 'fa fa-search-plus'
+                  })),
+              zoomToNormal = $('<button></button>', {
+                class: 'btn pg-explain-zoom-btn badge',
+                title: 'Zoom to original'
+                }).appendTo(zoomArea).append(
+                  $('<i></i>',{
+                    class: 'fa fa-arrows-alt'
+                  }))
+              zoomOutBtn = $('<button></button>', {
+                class: 'btn pg-explain-zoom-btn badge',
+                title: 'Zoom out'
+                }).appendTo(zoomArea).append(
+                  $('<i></i>', {
+                    class: 'fa fa-search-minus'
+                  }));
+
+          // Main div to be drawn all images on
+          var planDiv = $('<div></div>',
+                           {class: "pgadmin-explain-container"}
+                         ).appendTo(container),
+              // Div to draw tool-tip on
+              toolTip = $('<div></div>',
+                           {id: "toolTip",
+                           class: "pgadmin-explain-tooltip"
+                           }
+                         ).appendTo(container);
+          toolTip.empty();
+          planDiv.data('zoom-factor', curr_zoom_factor);
+
+          var w = 0, h = 0,
+              x = xMargin, h = yMargin;
+
+          _.each(plan, function(p) {
+            var main_plan = new MainPlanModel();
+
+            // Parse JSON data to backbone model
+            main_plan.set(main_plan.parse(p));
+            w = main_plan.get('width');
+            h = main_plan.get('height');
+
+            var s = Snap(w, h),
+                $svg = $(s.node).detach();
+            planDiv.append($svg);
+
+            main_plan.draw(s, w - xMargin, yMargin, planDiv, toolTip);
+
+            var initPanelWidth = planDiv.width(),
+                initPanelHeight = planDiv.height();
+
+             /*
+              * Scale graph in case its width is bigger than panel width
+              * in which the graph is displayed
+              */
+            if(initPanelWidth < w) {
+              var width_ratio = initPanelWidth / w;
+
+              curr_zoom_factor = width_ratio;
+              curr_zoom_factor = curr_zoom_factor < MIN_ZOOM_FACTOR ? MIN_ZOOM_FACTOR : curr_zoom_factor;
+              curr_zoom_factor = curr_zoom_factor > INIT_ZOOM_FACTOR ? INIT_ZOOM_FACTOR : curr_zoom_factor;
+
+              var zoomInMatrix = new Snap.matrix();
+              zoomInMatrix.scale(curr_zoom_factor, curr_zoom_factor);
+
+              $svg.find('g').first().attr({transform: zoomInMatrix});
+              $svg.attr({'width': w * curr_zoom_factor, 'height': h * curr_zoom_factor});
+              planDiv.data('zoom-factor', curr_zoom_factor);
+            }
+
+            zoomInBtn.on('click', function(e){
+              curr_zoom_factor = ((curr_zoom_factor + ZOOM_RATIO) > MAX_ZOOM_FACTOR) ? MAX_ZOOM_FACTOR : (curr_zoom_factor + ZOOM_RATIO);
+              var zoomInMatrix = new Snap.matrix();
+              zoomInMatrix.scale(curr_zoom_factor, curr_zoom_factor);
+
+              $svg.find('g').first().attr({transform: zoomInMatrix});
+              $svg.attr({'width': w * curr_zoom_factor, 'height': h * curr_zoom_factor});
+              planDiv.data('zoom-factor', curr_zoom_factor);
+              zoomInBtn.blur();
+            });
+
+            zoomOutBtn.on('click', function(e) {
+              curr_zoom_factor = ((curr_zoom_factor - ZOOM_RATIO) < MIN_ZOOM_FACTOR) ? MIN_ZOOM_FACTOR : (curr_zoom_factor - ZOOM_RATIO);
+              var zoomInMatrix = new Snap.matrix();
+              zoomInMatrix.scale(curr_zoom_factor, curr_zoom_factor);
+
+              $svg.find('g').first().attr({transform: zoomInMatrix});
+              $svg.attr({'width': w * curr_zoom_factor, 'height': h * curr_zoom_factor});
+              planDiv.data('zoom-factor', curr_zoom_factor);
+              zoomOutBtn.blur();
+            });
+
+            zoomToNormal.on('click', function(e) {
+              curr_zoom_factor = INIT_ZOOM_FACTOR;
+              var zoomInMatrix = new Snap.matrix();
+              zoomInMatrix.scale(curr_zoom_factor, curr_zoom_factor);
+
+              $svg.find('g').first().attr({transform: zoomInMatrix});
+              $svg.attr({'width': w * curr_zoom_factor, 'height': h * curr_zoom_factor});
+              planDiv.data('zoom-factor', curr_zoom_factor);
+              zoomToNormal.blur();
+            });
+          });
+        }
+    });
+
+    return pgExplain;
+});
diff --git a/web/pgadmin/tools/sqleditor/static/css/sqleditor.css b/web/pgadmin/tools/sqleditor/static/css/sqleditor.css
index 45612f6..cc74b29 100644
--- a/web/pgadmin/tools/sqleditor/static/css/sqleditor.css
+++ b/web/pgadmin/tools/sqleditor/static/css/sqleditor.css
@@ -247,3 +247,9 @@
   background: #5B9CEF;
   color: white;
 }
+
+.sql-editor-explain {
+  height: 100%;
+  width: 100%;
+  overflow: auto;
+}
diff --git a/web/pgadmin/tools/sqleditor/templates/sqleditor/js/sqleditor.js b/web/pgadmin/tools/sqleditor/templates/sqleditor/js/sqleditor.js
index d617d7a..9c065e2 100644
--- a/web/pgadmin/tools/sqleditor/templates/sqleditor/js/sqleditor.js
+++ b/web/pgadmin/tools/sqleditor/templates/sqleditor/js/sqleditor.js
@@ -1,9 +1,9 @@
 define(
-  ['jquery', 'underscore', 'alertify', 'pgadmin', 'backbone', 'backgrid', 'codemirror',
+  ['jquery', 'underscore', 'underscore.string', 'alertify', 'pgadmin', 'backbone', 'backgrid', 'codemirror', 'pgadmin.misc.explain',
    'codemirror/mode/sql', 'codemirror/addon/selection/mark-selection', 'codemirror/addon/selection/active-line',
    'backgrid.select.all', 'backbone.paginator', 'backgrid.paginator', 'backgrid.filter',
    'bootstrap', 'pgadmin.browser', 'wcdocker'],
-  function($, _, alertify, pgAdmin, Backbone, Backgrid, CodeMirror) {
+  function($, _, S, alertify, pgAdmin, Backbone, Backgrid, CodeMirror, pgExplain) {
 
     // Some scripts do export their object in the window only.
     // Generally the one, which do no have AMD support.
@@ -159,6 +159,12 @@ define(
         "click #btn-auto-commit": "on_auto_commit",
         "click #btn-auto-rollback": "on_auto_rollback",
         "click #btn-clear-history": "on_clear_history",
+        "click #btn-explain": "on_explain",
+        "click #btn-explain-analyze": "on_explain_analyze",
+        "click #btn-explain-verbose": "on_explain_verbose",
+        "click #btn-explain-costs": "on_explain_costs",
+        "click #btn-explain-buffers": "on_explain_buffers",
+        "click #btn-explain-timing": "on_explain_timing",
         "change .limit": "on_limit_change"
       },
 
@@ -217,10 +223,53 @@ define(
             '</button>',
             '<ul class="dropdown-menu dropdown-menu">',
               '<li>',
+                '<a id="btn-explain" href="#">',
+                  '<span>{{ _('Explain') }}</span>',
+                '</a>',
+              '</li>',
+              '<li>',
+                '<a id="btn-explain-analyze" href="#">',
+                    '<span>{{ _('Explain analyze') }}</span>',
+                '</a>',
+              '</li>',
+              '<li class="divider"></li>',
+              '<li class="dropdown-submenu dropdown-submenu">',
+                '<a href="#">{{ _('Explain Options') }}</a>',
+                '<ul class="dropdown-menu">',
+                  '<li>',
+                    '<a id="btn-explain-verbose" href="#" tabindex="-1">',
+                      '<i class="explain-verbose fa fa-check visibility-hidden" aria-hidden="true"></i>',
+                      '<span> {{ _('Verbose') }} </span>',
+                    '</a>',
+                  '</li>',
+                  '<li>',
+                    '<a id="btn-explain-costs" href="#">',
+                      '<i class="explain-costs fa fa-check visibility-hidden" aria-hidden="true"></i>',
+                      '<span> {{ _('Costs') }} </span>',
+                    '</a>',
+                  '</li>',
+                  '<li>',
+                    '<a id="btn-explain-buffers" href="#">',
+                      '<i class="explain-buffers fa fa-check visibility-hidden" aria-hidden="true"></i>',
+                      '<span> {{ _('Buffers') }} </span>',
+                    '</a>',
+                  '</li>',
+                  '<li>',
+                    '<a id="btn-explain-timing" href="#">',
+                      '<i class="explain-timing fa fa-check visibility-hidden" aria-hidden="true"></i>',
+                      '<span> {{ _('Timing') }} </span>',
+                    '</a>',
+                  '</li>',
+                '</ul>',
+              '</li>',
+              '<li class="divider"></li>',
+              '<li>',
                 '<a id="btn-auto-commit" href="#">',
                     '<i class="auto-commit fa fa-check" aria-hidden="true"></i>',
                     '<span> {{ _('Auto-Commit') }} </span>',
                 '</a>',
+              '</li>',
+              '<li>',
                 '<a id="btn-auto-rollback" href="#">',
                     '<i class="auto-rollback fa fa-check visibility-hidden" aria-hidden="true"></i>',
                     '<span> {{ _('Auto-Rollback') }} </span>',
@@ -377,7 +426,7 @@ define(
           height:'100%',
           isCloseable: false,
           isPrivate: true,
-          content: '<div class="sql-editor-explian"></div>'
+          content: '<div class="sql-editor-explain"></div>'
         })
 
         var messages = new pgAdmin.Browser.Panel({
@@ -768,6 +817,78 @@ define(
             self,
             self.handler
         );
+      },
+
+      // Callback function for explain button click.
+      on_explain: function() {
+        var self = this;
+
+        // Trigger the explain signal to the SqlEditorController class
+        self.handler.trigger(
+            'pgadmin-sqleditor:button:explain',
+            self,
+            self.handler
+        );
+      },
+
+      // Callback function for explain analyze button click.
+      on_explain_analyze: function() {
+        var self = this;
+
+        // Trigger the explain analyze signal to the SqlEditorController class
+        self.handler.trigger(
+            'pgadmin-sqleditor:button:explain-analyze',
+            self,
+            self.handler
+        );
+      },
+
+      // Callback function for explain option "verbose" button click
+      on_explain_verbose: function() {
+        var self = this;
+
+        // Trigger the explain "verbose" signal to the SqlEditorController class
+        self.handler.trigger(
+            'pgadmin-sqleditor:button:explain-verbose',
+            self,
+            self.handler
+        );
+      },
+
+      // Callback function for explain option "costs" button click
+      on_explain_costs: function() {
+        var self = this;
+
+        // Trigger the explain "costs" signal to the SqlEditorController class
+        self.handler.trigger(
+            'pgadmin-sqleditor:button:explain-costs',
+            self,
+            self.handler
+        );
+      },
+
+      // Callback function for explain option "buffers" button click
+      on_explain_buffers: function() {
+        var self = this;
+
+        // Trigger the explain "buffers" signal to the SqlEditorController class
+        self.handler.trigger(
+            'pgadmin-sqleditor:button:explain-buffers',
+            self,
+            self.handler
+        );
+      },
+
+      // Callback function for explain option "timing" button click
+      on_explain_timing: function() {
+        var self = this;
+
+        // Trigger the explain "timing" signal to the SqlEditorController class
+        self.handler.trigger(
+            'pgadmin-sqleditor:button:explain-timing',
+            self,
+            self.handler
+        );
       }
     });
 
@@ -830,6 +951,12 @@ define(
           self.on('pgadmin-sqleditor:button:download', self._download, self);
           self.on('pgadmin-sqleditor:button:auto_rollback', self._auto_rollback, self);
           self.on('pgadmin-sqleditor:button:auto_commit', self._auto_commit, self);
+          self.on('pgadmin-sqleditor:button:explain', self._explain, self);
+          self.on('pgadmin-sqleditor:button:explain-analyze', self._explain_analyze, self);
+          self.on('pgadmin-sqleditor:button:explain-verbose', self._explain_verbose, self);
+          self.on('pgadmin-sqleditor:button:explain-costs', self._explain_costs, self);
+          self.on('pgadmin-sqleditor:button:explain-buffers', self._explain_buffers, self);
+          self.on('pgadmin-sqleditor:button:explain-timing', self._explain_timing, self);
 
           if (self.is_query_tool) {
             self.gridView.query_tool_obj.refresh();
@@ -1083,10 +1210,24 @@ define(
           var message = 'Total query runtime: ' + self.total_time + '\n' + self.rows_affected + ' rows retrieved.';
           $('.sql-editor-message').text(message);
 
-          // Add the data to the collection and render the grid.
-          self.collection.add(data.result, {parse: true});
-          self.gridView.render_grid(self.collection, self.columns);
-          self.gridView.data_output_panel.focus();
+          /* Add the data to the collection and render the grid.
+           * In case of Explain draw the graph on explain panel
+           * and add json formatted data to collection and render.
+           */
+          var explain_data_array = [];
+          if('QUERY PLAN' in data.result[0]) {
+            self.gridView.explain_panel.focus();
+            var explain_data = {'QUERY PLAN' : JSON.stringify(data.result[0]['QUERY PLAN'], null, 2)};
+            explain_data_array.push(explain_data);
+            pgExplain.DrawJSONPlan($('.sql-editor-explain'), data.result[0]['QUERY PLAN']);
+            self.collection.add(explain_data_array, {parse: true});
+            self.gridView.render_grid(self.collection, self.columns);
+          }
+          else {
+            self.collection.add(data.result, {parse: true});
+            self.gridView.render_grid(self.collection, self.columns);
+            self.gridView.data_output_panel.focus();
+          }
 
           // Hide the loading icon
           self.trigger('pgadmin-sqleditor:loading-icon:hide');
@@ -1812,7 +1953,7 @@ define(
 
         // This function will fetch the sql query from the text box
         // and execute the query.
-        _execute: function () {
+        _execute: function (explain_prefix) {
           var self = this,
               sql = '',
               history_msg = '';
@@ -1831,6 +1972,9 @@ define(
           else
             sql = self.gridView.query_tool_obj.getValue();
 
+          if (explain_prefix != undefined)
+            sql = explain_prefix + ' ' + sql;
+
           self.query_start_time = new Date();
           self.query = sql;
           self.rows_affected = 0;
@@ -2149,6 +2293,71 @@ define(
               alertify.alert('Auto Commit Error', msg);
             }
           });
+        },
+
+        // This function will
+        _explain: function() {
+          var self = this;
+          var verbose = $('.explain-verbose').hasClass('visibility-hidden') ? 'off' : 'on';
+          var costs = $('.explain-costs').hasClass('visibility-hidden') ? 'off' : 'on';
+          var buffers = $('.explain-buffers').hasClass('visibility-hidden') ? 'off' : 'on';
+          var timing = $('.explain-timing').hasClass('visibility-hidden') ? 'off' : 'on';
+
+          var explain_query = 'Explain (format json, ANALYZE off, VERBOSE %s, COSTS %s, BUFFERS %s, TIMING %s) ';
+          explain_query = S(explain_query).sprintf(verbose, costs, buffers, timing).value();
+          self._execute(explain_query);
+        },
+
+        // This function will
+        _explain_analyze: function() {
+          var self = this;var verbose = $('.explain-verbose').hasClass('visibility-hidden') ? 'off' : 'on';
+          var costs = $('.explain-costs').hasClass('visibility-hidden') ? 'off' : 'on';
+          var buffers = $('.explain-buffers').hasClass('visibility-hidden') ? 'off' : 'on';
+          var timing = $('.explain-timing').hasClass('visibility-hidden') ? 'off' : 'on';
+
+          var explain_query = 'Explain (format json, ANALYZE on, VERBOSE %s, COSTS %s, BUFFERS %s, TIMING %s) ';
+          explain_query = S(explain_query).sprintf(verbose, costs, buffers, timing).value();
+          self._execute(explain_query);
+        },
+
+        // This function will toggle "verbose" option in explain
+        _explain_verbose: function() {
+          var self = this;
+          if ($('.explain-verbose').hasClass('visibility-hidden') === true)
+            $('.explain-verbose').removeClass('visibility-hidden');
+          else {
+            $('.explain-verbose').addClass('visibility-hidden');
+          }
+        },
+
+        // This function will toggle "costs" option in explain
+        _explain_costs: function() {
+          var self = this;
+          if ($('.explain-costs').hasClass('visibility-hidden') === true)
+            $('.explain-costs').removeClass('visibility-hidden');
+          else {
+            $('.explain-costs').addClass('visibility-hidden');
+          }
+        },
+
+        // This function will toggle "buffers" option in explain
+        _explain_buffers: function() {
+          var self = this;
+          if ($('.explain-buffers').hasClass('visibility-hidden') === true)
+            $('.explain-buffers').removeClass('visibility-hidden');
+          else {
+            $('.explain-buffers').addClass('visibility-hidden');
+          }
+        },
+
+        // This function will toggle "timing" option in explain
+        _explain_timing: function() {
+          var self = this;
+          if ($('.explain-timing').hasClass('visibility-hidden') === true)
+            $('.explain-timing').removeClass('visibility-hidden');
+          else {
+            $('.explain-timing').addClass('visibility-hidden');
+          }
         }
       }
     );


^ permalink  raw  reply  [nested|flat] 10+ messages in thread