From 19e5f051b7b3f867d23815d53d37ac7ac7eb5005 Mon Sep 17 00:00:00 2001
From: Tom van Woudenberg <t.r.vanwoudenberg@tudelft.nl>
Date: Tue, 18 Mar 2025 14:13:46 +0100
Subject: [PATCH] Added svg image for download

---
 book/features/Jessyink.md                   |    2 +-
 book/features/my_first_svg_presentation.svg | 3567 +++++++++++++++++++
 2 files changed, 3568 insertions(+), 1 deletion(-)
 create mode 100644 book/features/my_first_svg_presentation.svg

diff --git a/book/features/Jessyink.md b/book/features/Jessyink.md
index ccf3602..657bc65 100644
--- a/book/features/Jessyink.md
+++ b/book/features/Jessyink.md
@@ -12,7 +12,7 @@ SVG images can be made interactive by adding 'slides' to the SVG. This allows us
 ```{iframe-figure} ../_static/my_first_svg_presentation.svg
 :name: svg_presentation
 
-Click through this interactive SVG image!
+Click through this interactive SVG image, available for download [here](./my_first_svg_presentation.svg)
 ```
 
 [Inkscape](https://inkscape.org/) is a drawing program with which you can create SVG files.
diff --git a/book/features/my_first_svg_presentation.svg b/book/features/my_first_svg_presentation.svg
new file mode 100644
index 0000000..52fa738
--- /dev/null
+++ b/book/features/my_first_svg_presentation.svg
@@ -0,0 +1,3567 @@
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+         id="tspan2"
+         style="stroke-width:0.264583"
+         x="3.96875"
+         y="58.208332">My first presentation</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:3.8095px;line-height:normal;font-family:Monospace;-inkscape-font-specification:'Monospace, Normal';text-decoration-color:#000000;fill:#000000;stroke-width:0.264583;-inkscape-stroke:none;stop-color:#000000"
+       x="65.887276"
+       y="58.154388"
+       id="text3"><tspan
+         sodipodi:role="line"
+         id="tspan3"
+         style="stroke-width:0.264583"
+         x="65.887276"
+         y="58.154388">Slide:</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:3.8095px;line-height:normal;font-family:Monospace;-inkscape-font-specification:'Monospace, Normal';text-decoration-color:#000000;fill:#000000;stroke-width:0.264583;-inkscape-stroke:none;stop-color:#000000"
+       x="66.142113"
+       y="63.499996"
+       id="text4"><tspan
+         sodipodi:role="line"
+         id="tspan4"
+         style="stroke-width:0.264583"
+         x="66.142113"
+         y="63.499996"
+         ns1:autoText="slideTitle">##</tspan></text>
+  </g>
+  <script
+     id="JessyInk"
+     ns1:version="1.5.5">// Copyright 2008, 2009 Hannes Hochreiner
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see http://www.gnu.org/licenses/.
+
+// Set onload event handler.
+window.onload = jessyInkInit;
+
+// Creating a namespace dictionary. The standard Inkscape namespaces are taken from inkex.py.
+var NSS = new Object();
+NSS['sodipodi']='http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd';
+NSS['cc']='http://web.resource.org/cc/';
+NSS['svg']='http://www.w3.org/2000/svg';
+NSS['dc']='http://purl.org/dc/elements/1.1/';
+NSS['rdf']='http://www.w3.org/1999/02/22-rdf-syntax-ns#';
+NSS['inkscape']='http://www.inkscape.org/namespaces/inkscape';
+NSS['xlink']='http://www.w3.org/1999/xlink';
+NSS['xml']='http://www.w3.org/XML/1998/namespace';
+NSS['jessyink']='https://launchpad.net/jessyink';
+
+// Keycodes.
+var LEFT_KEY = 37; // cursor left keycode
+var UP_KEY = 38; // cursor up keycode
+var RIGHT_KEY = 39; // cursor right keycode
+var DOWN_KEY = 40; // cursor down keycode
+var PAGE_UP_KEY = 33; // page up keycode
+var PAGE_DOWN_KEY = 34; // page down keycode
+var HOME_KEY = 36; // home keycode
+var END_KEY = 35; // end keycode
+var ENTER_KEY = 13; // next slide
+var SPACE_KEY = 32;
+var ESCAPE_KEY = 27;
+
+// Presentation modes.
+var SLIDE_MODE = 1;
+var INDEX_MODE = 2;
+var DRAWING_MODE = 3;
+
+// Mouse handler actions.
+var MOUSE_UP = 1;
+var MOUSE_DOWN = 2;
+var MOUSE_MOVE = 3;
+var MOUSE_WHEEL = 4;
+
+// Parameters.
+var ROOT_NODE = document.getElementsByTagNameNS(NSS[&quot;svg&quot;], &quot;svg&quot;)[0];
+var HEIGHT = 0;
+var WIDTH = 0;
+var INDEX_COLUMNS_DEFAULT = 4;
+var INDEX_COLUMNS = INDEX_COLUMNS_DEFAULT;
+var INDEX_OFFSET = 0;
+var STATE_START = -1;
+var STATE_END = -2;
+var BACKGROUND_COLOR = null;
+var slides = new Array();
+
+// Initialisation.
+var currentMode = SLIDE_MODE;
+var masterSlide = null;
+var activeSlide = 0;
+var activeEffect = 0;
+var timeStep = 30; // 40 ms equal 25 frames per second.
+var lastFrameTime = null;
+var processingEffect = false;
+var transCounter = 0;
+var effectArray = 0;
+var defaultTransitionInDict = new Object();
+defaultTransitionInDict[&quot;name&quot;] = &quot;appear&quot;;
+var defaultTransitionOutDict = new Object();
+defaultTransitionOutDict[&quot;name&quot;] = &quot;appear&quot;;
+var jessyInkInitialised = false;
+
+// Initialise char and key code dictionaries.
+var charCodeDictionary = getDefaultCharCodeDictionary();
+var keyCodeDictionary = getDefaultKeyCodeDictionary();
+
+// Initialise mouse handler dictionary.
+var mouseHandlerDictionary = getDefaultMouseHandlerDictionary();
+
+var progress_bar_visible = false;
+var timer_elapsed = 0;
+var timer_start = timer_elapsed;
+var timer_duration = 15; // 15 minutes
+
+var history_counter = 0;
+var history_original_elements = new Array();
+var history_presentation_elements = new Array();
+
+var mouse_original_path = null;
+var mouse_presentation_path = null;
+var mouse_last_x = -1;
+var mouse_last_y = -1;
+var mouse_min_dist_sqr = 3 * 3;
+var path_colour = &quot;red&quot;;
+var path_width_default = 3;
+var path_width = path_width_default;
+var path_paint_width = path_width;
+
+var number_of_added_slides = 0;
+
+/** Initialisation function.
+ *  The whole presentation is set-up in this function.
+ */
+function jessyInkInit()
+{
+    // Make sure we only execute this code once. Double execution can occur if the onload event handler is set
+    // in the main svg tag as well (as was recommended in earlier versions). Executing this function twice does
+    // not lead to any problems, but it takes more time.
+    if (jessyInkInitialised)
+        return;
+
+    // Making the presentation scalable.
+    var VIEWBOX = ROOT_NODE.getAttribute(&quot;viewBox&quot;);
+
+    if (VIEWBOX)
+    {
+        WIDTH = ROOT_NODE.viewBox.animVal.width;
+        HEIGHT = ROOT_NODE.viewBox.animVal.height;
+    }
+    else
+    {
+        HEIGHT = parseFloat(ROOT_NODE.getAttribute(&quot;height&quot;));
+        WIDTH = parseFloat(ROOT_NODE.getAttribute(&quot;width&quot;));
+        ROOT_NODE.setAttribute(&quot;viewBox&quot;, &quot;0 0 &quot; + WIDTH + &quot; &quot; + HEIGHT);
+    }
+
+    ROOT_NODE.setAttribute(&quot;width&quot;, &quot;100%&quot;);
+    ROOT_NODE.setAttribute(&quot;height&quot;, &quot;100%&quot;);
+
+    // Setting the background color.
+    var namedViews = document.getElementsByTagNameNS(NSS[&quot;sodipodi&quot;], &quot;namedview&quot;);
+
+    for (var counter = 0; counter &lt; namedViews.length; counter++)
+    {
+        if (namedViews[counter].hasAttribute(&quot;id&quot;) &amp;&amp; namedViews[counter].hasAttribute(&quot;pagecolor&quot;))
+        {
+            if (namedViews[counter].getAttribute(&quot;id&quot;) == &quot;base&quot;)
+            {
+                BACKGROUND_COLOR = namedViews[counter].getAttribute(&quot;pagecolor&quot;);
+                var newAttribute = &quot;background-color:&quot; + BACKGROUND_COLOR + &quot;;&quot;;
+
+                if (ROOT_NODE.hasAttribute(&quot;style&quot;))
+                    newAttribute += ROOT_NODE.getAttribute(&quot;style&quot;);
+
+                ROOT_NODE.setAttribute(&quot;style&quot;, newAttribute);
+            }
+        }
+    }
+
+    // Defining clip-path.
+    var defsNodes = document.getElementsByTagNameNS(NSS[&quot;svg&quot;], &quot;defs&quot;);
+
+    if (defsNodes.length &gt; 0)
+    {
+        var existingClipPath = document.getElementById(&quot;jessyInkSlideClipPath&quot;);
+
+        if (!existingClipPath)
+        {
+            var rectNode = document.createElementNS(NSS[&quot;svg&quot;], &quot;rect&quot;);
+            var clipPath = document.createElementNS(NSS[&quot;svg&quot;], &quot;clipPath&quot;);
+
+            rectNode.setAttribute(&quot;x&quot;, 0);
+            rectNode.setAttribute(&quot;y&quot;, 0);
+            rectNode.setAttribute(&quot;width&quot;, WIDTH);
+            rectNode.setAttribute(&quot;height&quot;, HEIGHT);
+
+            clipPath.setAttribute(&quot;id&quot;, &quot;jessyInkSlideClipPath&quot;);
+            clipPath.setAttribute(&quot;clipPathUnits&quot;, &quot;userSpaceOnUse&quot;);
+
+            clipPath.appendChild(rectNode);
+            defsNodes[0].appendChild(clipPath);
+        }
+    }
+
+    // Making a list of the slide and finding the master slide.
+    var nodes = document.getElementsByTagNameNS(NSS[&quot;svg&quot;], &quot;g&quot;);
+    var tempSlides = new Array();
+    var existingJessyInkPresentationLayer = null;
+
+    for (var counter = 0; counter &lt; nodes.length; counter++)
+    {
+        if (nodes[counter].getAttributeNS(NSS[&quot;inkscape&quot;], &quot;groupmode&quot;) &amp;&amp; (nodes[counter].getAttributeNS(NSS[&quot;inkscape&quot;], &quot;groupmode&quot;) == &quot;layer&quot;))
+        {
+            if (nodes[counter].getAttributeNS(NSS[&quot;inkscape&quot;], &quot;label&quot;) &amp;&amp; nodes[counter].getAttributeNS(NSS[&quot;jessyink&quot;], &quot;masterSlide&quot;) == &quot;masterSlide&quot;)
+                masterSlide = nodes[counter];
+            else if (nodes[counter].getAttributeNS(NSS[&quot;inkscape&quot;], &quot;label&quot;) &amp;&amp; nodes[counter].getAttributeNS(NSS[&quot;jessyink&quot;], &quot;presentationLayer&quot;) == &quot;presentationLayer&quot;)
+                existingJessyInkPresentationLayer = nodes[counter];
+            else
+                tempSlides.push(nodes[counter].getAttribute(&quot;id&quot;));
+        }
+        else if (nodes[counter].getAttributeNS(NSS['jessyink'], 'element'))
+        {
+            handleElement(nodes[counter]);
+        }
+    }
+
+    // Hide master slide set default transitions.
+    if (masterSlide)
+    {
+        masterSlide.style.display = &quot;none&quot;;
+
+        if (masterSlide.hasAttributeNS(NSS[&quot;jessyink&quot;], &quot;transitionIn&quot;))
+            defaultTransitionInDict = propStrToDict(masterSlide.getAttributeNS(NSS[&quot;jessyink&quot;], &quot;transitionIn&quot;));
+
+        if (masterSlide.hasAttributeNS(NSS[&quot;jessyink&quot;], &quot;transitionOut&quot;))
+            defaultTransitionOutDict = propStrToDict(masterSlide.getAttributeNS(NSS[&quot;jessyink&quot;], &quot;transitionOut&quot;));
+    }
+
+    if (existingJessyInkPresentationLayer != null)
+    {
+        existingJessyInkPresentationLayer.parentNode.removeChild(existingJessyInkPresentationLayer);
+    }
+
+    // Set start slide.
+    var hashObj = new LocationHash(window.location.hash);
+
+    activeSlide = hashObj.slideNumber;
+    activeEffect = hashObj.effectNumber;
+
+    if (activeSlide &lt; 0)
+        activeSlide = 0;
+    else if (activeSlide &gt;= tempSlides.length)
+        activeSlide = tempSlides.length - 1;
+
+    var originalNode = document.getElementById(tempSlides[counter]);
+
+    var JessyInkPresentationLayer = document.createElementNS(NSS[&quot;svg&quot;], &quot;g&quot;);
+    JessyInkPresentationLayer.setAttributeNS(NSS[&quot;inkscape&quot;], &quot;groupmode&quot;, &quot;layer&quot;);
+    JessyInkPresentationLayer.setAttributeNS(NSS[&quot;inkscape&quot;], &quot;label&quot;, &quot;JessyInk Presentation Layer&quot;);
+    JessyInkPresentationLayer.setAttributeNS(NSS[&quot;jessyink&quot;], &quot;presentationLayer&quot;, &quot;presentationLayer&quot;);
+    JessyInkPresentationLayer.setAttribute(&quot;id&quot;, &quot;jessyink_presentation_layer&quot;);
+    JessyInkPresentationLayer.style.display = &quot;inherit&quot;;
+    ROOT_NODE.appendChild(JessyInkPresentationLayer);
+
+    // Gathering all the information about the transitions and effects of the slides, set the background
+    // from the master slide and substitute the auto-texts.
+    for (var counter = 0; counter &lt; tempSlides.length; counter++)
+    {
+        var originalNode = document.getElementById(tempSlides[counter]);
+        originalNode.style.display = &quot;none&quot;;
+        var node = suffixNodeIds(originalNode.cloneNode(true), &quot;_&quot; + counter);
+        JessyInkPresentationLayer.appendChild(node);
+        slides[counter] = new Object();
+        slides[counter][&quot;original_element&quot;] = originalNode;
+        slides[counter][&quot;element&quot;] = node;
+
+        // Set build in transition.
+        slides[counter][&quot;transitionIn&quot;] = new Object();
+
+        var dict;
+
+        if (node.hasAttributeNS(NSS[&quot;jessyink&quot;], &quot;transitionIn&quot;))
+            dict = propStrToDict(node.getAttributeNS(NSS[&quot;jessyink&quot;], &quot;transitionIn&quot;));
+        else
+            dict = defaultTransitionInDict;
+
+        slides[counter][&quot;transitionIn&quot;][&quot;name&quot;] = dict[&quot;name&quot;];
+        slides[counter][&quot;transitionIn&quot;][&quot;options&quot;] = new Object();
+
+        for (key in dict)
+            if (key != &quot;name&quot;)
+                slides[counter][&quot;transitionIn&quot;][&quot;options&quot;][key] = dict[key];
+
+        // Set build out transition.
+        slides[counter][&quot;transitionOut&quot;] = new Object();
+
+        if (node.hasAttributeNS(NSS[&quot;jessyink&quot;], &quot;transitionOut&quot;))
+            dict = propStrToDict(node.getAttributeNS(NSS[&quot;jessyink&quot;], &quot;transitionOut&quot;));
+        else
+            dict = defaultTransitionOutDict;
+
+        slides[counter][&quot;transitionOut&quot;][&quot;name&quot;] = dict[&quot;name&quot;];
+        slides[counter][&quot;transitionOut&quot;][&quot;options&quot;] = new Object();
+
+        for (key in dict)
+            if (key != &quot;name&quot;)
+                slides[counter][&quot;transitionOut&quot;][&quot;options&quot;][key] = dict[key];
+
+        // Copy master slide content.
+        if (masterSlide)
+        {
+            var clonedNode = suffixNodeIds(masterSlide.cloneNode(true), &quot;_&quot; + counter);
+            clonedNode.removeAttributeNS(NSS[&quot;inkscape&quot;], &quot;groupmode&quot;);
+            clonedNode.removeAttributeNS(NSS[&quot;inkscape&quot;], &quot;label&quot;);
+            clonedNode.style.display = &quot;inherit&quot;;
+
+            node.insertBefore(clonedNode, node.firstChild);
+        }
+
+        // Setting clip path.
+        node.setAttribute(&quot;clip-path&quot;, &quot;url(#jessyInkSlideClipPath)&quot;);
+
+        // Substitute auto texts.
+        substituteAutoTexts(node, node.getAttributeNS(NSS[&quot;inkscape&quot;], &quot;label&quot;), counter + 1, tempSlides.length);
+
+        node.removeAttributeNS(NSS[&quot;inkscape&quot;], &quot;groupmode&quot;);
+        node.removeAttributeNS(NSS[&quot;inkscape&quot;], &quot;label&quot;);
+
+        // Set effects.
+        var tempEffects = new Array();
+        var groups = new Object();
+
+        for (var IOCounter = 0; IOCounter &lt;= 1; IOCounter++)
+        {
+            var propName = &quot;&quot;;
+            var dir = 0;
+
+            if (IOCounter == 0)
+            {
+                propName = &quot;effectIn&quot;;
+                dir = 1;
+            }
+            else if (IOCounter == 1)
+            {
+                propName = &quot;effectOut&quot;;
+                dir = -1;
+            }
+
+            var effects = getElementsByPropertyNS(node, NSS[&quot;jessyink&quot;], propName);
+
+            for (var effectCounter = 0; effectCounter &lt; effects.length; effectCounter++)
+            {
+                var element = document.getElementById(effects[effectCounter]);
+                var dict = propStrToDict(element.getAttributeNS(NSS[&quot;jessyink&quot;], propName));
+
+                // Put every element that has an effect associated with it, into its own group.
+                // Unless of course, we already put it into its own group.
+                if (!(groups[element.id]))
+                {
+                    var newGroup = document.createElementNS(NSS[&quot;svg&quot;], &quot;g&quot;);
+
+                    element.parentNode.insertBefore(newGroup, element);
+                    newGroup.appendChild(element.parentNode.removeChild(element));
+                    groups[element.id] = newGroup;
+                }
+
+                var effectDict = new Object();
+
+                effectDict[&quot;effect&quot;] = dict[&quot;name&quot;];
+                effectDict[&quot;dir&quot;] = dir;
+                effectDict[&quot;element&quot;] = groups[element.id];
+
+                for (var option in dict)
+                {
+                    if ((option != &quot;name&quot;) &amp;&amp; (option != &quot;order&quot;))
+                    {
+                        if (!effectDict[&quot;options&quot;])
+                            effectDict[&quot;options&quot;] = new Object();
+
+                        effectDict[&quot;options&quot;][option] = dict[option];
+                    }
+                }
+
+                if (!tempEffects[dict[&quot;order&quot;]])
+                    tempEffects[dict[&quot;order&quot;]] = new Array();
+
+                tempEffects[dict[&quot;order&quot;]][tempEffects[dict[&quot;order&quot;]].length] = effectDict;
+            }
+        }
+
+        // Make invisible, but keep in rendering tree to ensure that bounding box can be calculated.
+        node.setAttribute(&quot;opacity&quot;,0);
+        node.style.display = &quot;inherit&quot;;
+
+        // Create a transform group.
+        var transformGroup = document.createElementNS(NSS[&quot;svg&quot;], &quot;g&quot;);
+
+        // Add content to transform group.
+        while (node.firstChild)
+            transformGroup.appendChild(node.firstChild);
+
+        // Transfer the transform attribute from the node to the transform group.
+        if (node.getAttribute(&quot;transform&quot;))
+        {
+            transformGroup.setAttribute(&quot;transform&quot;, node.getAttribute(&quot;transform&quot;));
+            node.removeAttribute(&quot;transform&quot;);
+        }
+
+        // Create a view group.
+        var viewGroup = document.createElementNS(NSS[&quot;svg&quot;], &quot;g&quot;);
+
+        viewGroup.appendChild(transformGroup);
+        slides[counter][&quot;viewGroup&quot;] = node.appendChild(viewGroup);
+
+        // Insert background.
+        if (BACKGROUND_COLOR != null)
+        {
+            var rectNode = document.createElementNS(NSS[&quot;svg&quot;], &quot;rect&quot;);
+
+            rectNode.setAttribute(&quot;x&quot;, 0);
+            rectNode.setAttribute(&quot;y&quot;, 0);
+            rectNode.setAttribute(&quot;width&quot;, WIDTH);
+            rectNode.setAttribute(&quot;height&quot;, HEIGHT);
+            rectNode.setAttribute(&quot;id&quot;, &quot;jessyInkBackground&quot; + counter);
+            rectNode.setAttribute(&quot;fill&quot;, BACKGROUND_COLOR);
+
+            slides[counter][&quot;viewGroup&quot;].insertBefore(rectNode, slides[counter][&quot;viewGroup&quot;].firstChild);
+        }
+
+        // Set views.
+        var tempViews = new Array();
+        var views = getElementsByPropertyNS(node, NSS[&quot;jessyink&quot;], &quot;view&quot;);
+        var matrixOld = (new matrixSVG()).fromElements(1, 0, 0, 0, 1, 0, 0, 0, 1);
+
+        // Set initial view even if there are no other views.
+        slides[counter][&quot;viewGroup&quot;].setAttribute(&quot;transform&quot;, matrixOld.toAttribute());
+        slides[counter].initialView = matrixOld.toAttribute();
+
+        for (var viewCounter = 0; viewCounter &lt; views.length; viewCounter++)
+        {
+            var element = document.getElementById(views[viewCounter]);
+            var dict = propStrToDict(element.getAttributeNS(NSS[&quot;jessyink&quot;], &quot;view&quot;));
+
+            if (dict[&quot;order&quot;] == 0)
+            {
+                matrixOld = pointMatrixToTransformation(rectToMatrix(element)).mult((new matrixSVG()).fromSVGMatrix(slides[counter].viewGroup.getScreenCTM()).inv().mult((new matrixSVG()).fromSVGMatrix(element.parentNode.getScreenCTM())).inv());
+                slides[counter].initialView = matrixOld.toAttribute();
+            }
+            else
+            {
+                var effectDict = new Object();
+
+                effectDict[&quot;effect&quot;] = dict[&quot;name&quot;];
+                effectDict[&quot;dir&quot;] = 1;
+                effectDict[&quot;element&quot;] = slides[counter][&quot;viewGroup&quot;];
+                effectDict[&quot;order&quot;] = dict[&quot;order&quot;];
+
+                for (var option in dict)
+                {
+                    if ((option != &quot;name&quot;) &amp;&amp; (option != &quot;order&quot;))
+                    {
+                        if (!effectDict[&quot;options&quot;])
+                            effectDict[&quot;options&quot;] = new Object();
+
+                        effectDict[&quot;options&quot;][option] = dict[option];
+                    }
+                }
+
+                effectDict[&quot;options&quot;][&quot;matrixNew&quot;] = pointMatrixToTransformation(rectToMatrix(element)).mult((new matrixSVG()).fromSVGMatrix(slides[counter].viewGroup.getScreenCTM()).inv().mult((new matrixSVG()).fromSVGMatrix(element.parentNode.getScreenCTM())).inv());
+
+                tempViews[dict[&quot;order&quot;]] = effectDict;
+            }
+
+            // Remove element.
+            element.parentNode.removeChild(element);
+        }
+
+        // Consolidate view array and append it to the effect array.
+        if (tempViews.length &gt; 0)
+        {
+            for (var viewCounter = 0; viewCounter &lt; tempViews.length; viewCounter++)
+            {
+                if (tempViews[viewCounter])
+                {
+                    tempViews[viewCounter][&quot;options&quot;][&quot;matrixOld&quot;] = matrixOld;
+                    matrixOld = tempViews[viewCounter][&quot;options&quot;][&quot;matrixNew&quot;];
+
+                    if (!tempEffects[tempViews[viewCounter][&quot;order&quot;]])
+                        tempEffects[tempViews[viewCounter][&quot;order&quot;]] = new Array();
+
+                    tempEffects[tempViews[viewCounter][&quot;order&quot;]][tempEffects[tempViews[viewCounter][&quot;order&quot;]].length] = tempViews[viewCounter];
+                }
+            }
+        }
+
+        // Set consolidated effect array.
+        if (tempEffects.length &gt; 0)
+        {
+            slides[counter][&quot;effects&quot;] = new Array();
+
+            for (var effectCounter = 0; effectCounter &lt; tempEffects.length; effectCounter++)
+            {
+                if (tempEffects[effectCounter])
+                    slides[counter][&quot;effects&quot;][slides[counter][&quot;effects&quot;].length] = tempEffects[effectCounter];
+            }
+        }
+
+        node.setAttribute(&quot;onmouseover&quot;, &quot;if ((currentMode == INDEX_MODE) &amp;&amp; ( activeSlide != &quot; + counter + &quot;)) { indexSetActiveSlide(&quot; + counter + &quot;); };&quot;);
+
+        // Set visibility for initial state.
+        if (counter == activeSlide)
+        {
+            node.style.display = &quot;inherit&quot;;
+            node.setAttribute(&quot;opacity&quot;,1);
+        }
+        else
+        {
+            node.style.display = &quot;none&quot;;
+            node.setAttribute(&quot;opacity&quot;,0);
+        }
+    }
+
+    // Set key handler.
+    var jessyInkObjects = document.getElementsByTagNameNS(NSS[&quot;svg&quot;], &quot;g&quot;);
+
+    for (var counter = 0; counter &lt; jessyInkObjects.length; counter++)
+    {
+        var elem = jessyInkObjects[counter];
+
+        if (elem.getAttributeNS(NSS[&quot;jessyink&quot;], &quot;customKeyBindings&quot;))
+        {
+            if (elem.getCustomKeyBindings != undefined)
+                keyCodeDictionary = elem.getCustomKeyBindings();
+
+            if (elem.getCustomCharBindings != undefined)
+                charCodeDictionary = elem.getCustomCharBindings();
+        }
+    }
+
+    // Set mouse handler.
+    var jessyInkMouseHandler = document.getElementsByTagNameNS(NSS[&quot;jessyink&quot;], &quot;mousehandler&quot;);
+
+    for (var counter = 0; counter &lt; jessyInkMouseHandler.length; counter++)
+    {
+        var elem = jessyInkMouseHandler[counter];
+
+        if (elem.getMouseHandler != undefined)
+        {
+            var tempDict = elem.getMouseHandler();
+
+            for (mode in tempDict)
+            {
+                if (!mouseHandlerDictionary[mode])
+                    mouseHandlerDictionary[mode] = new Object();
+
+                for (handler in tempDict[mode])
+                    mouseHandlerDictionary[mode][handler] = tempDict[mode][handler];
+            }
+        }
+    }
+
+    // Check effect number.
+    if ((activeEffect &lt; 0) || (!slides[activeSlide].effects))
+    {
+        activeEffect = 0;
+    }
+    else if (activeEffect &gt; slides[activeSlide].effects.length)
+    {
+        activeEffect = slides[activeSlide].effects.length;
+    }
+
+    createProgressBar(JessyInkPresentationLayer);
+    hideProgressBar();
+    setProgressBarValue(activeSlide);
+    setTimeIndicatorValue(0);
+    setInterval(&quot;updateTimer()&quot;, 1000);
+    setSlideToState(activeSlide, activeEffect);
+    jessyInkInitialised = true;
+}
+
+/** Function to substitute the auto-texts.
+ *
+ *  @param node the node
+ *  @param slideName name of the slide the node is on
+ *  @param slideNumber number of the slide the node is on
+ *  @param numberOfSlides number of slides in the presentation
+ */
+function substituteAutoTexts(node, slideName, slideNumber, numberOfSlides)
+{
+    var texts = node.getElementsByTagNameNS(NSS[&quot;svg&quot;], &quot;tspan&quot;);
+
+    for (var textCounter = 0; textCounter &lt; texts.length; textCounter++)
+    {
+        if (texts[textCounter].getAttributeNS(NSS[&quot;jessyink&quot;], &quot;autoText&quot;) == &quot;slideNumber&quot;)
+            texts[textCounter].firstChild.nodeValue = slideNumber;
+        else if (texts[textCounter].getAttributeNS(NSS[&quot;jessyink&quot;], &quot;autoText&quot;) == &quot;numberOfSlides&quot;)
+            texts[textCounter].firstChild.nodeValue = numberOfSlides;
+        else if (texts[textCounter].getAttributeNS(NSS[&quot;jessyink&quot;], &quot;autoText&quot;) == &quot;slideTitle&quot;)
+            texts[textCounter].firstChild.nodeValue = slideName;
+    }
+}
+
+/** Convenience function to get an element depending on whether it has a property with a particular name.
+ *    This function emulates some dearly missed XPath functionality.
+ *
+ *  @param node the node
+ *  @param namespace namespace of the attribute
+ *  @param name attribute name
+ */
+function getElementsByPropertyNS(node, namespace, name)
+{
+    var elems = new Array();
+
+    if (node.getAttributeNS(namespace, name))
+        elems.push(node.getAttribute(&quot;id&quot;));
+
+    for (var counter = 0; counter &lt; node.childNodes.length; counter++)
+    {
+        if (node.childNodes[counter].nodeType == 1)
+            elems = elems.concat(getElementsByPropertyNS(node.childNodes[counter], namespace, name));
+    }
+
+    return elems;
+}
+
+/** Function to dispatch the next effect, if there is none left, change the slide.
+ *
+ *  @param dir direction of the change (1 = forwards, -1 = backwards)
+ */
+function dispatchEffects(dir)
+{
+    if (slides[activeSlide][&quot;effects&quot;] &amp;&amp; (((dir == 1) &amp;&amp; (activeEffect &lt; slides[activeSlide][&quot;effects&quot;].length)) || ((dir == -1) &amp;&amp; (activeEffect &gt; 0))))
+    {
+        processingEffect = true;
+
+        if (dir == 1)
+        {
+            effectArray = slides[activeSlide][&quot;effects&quot;][activeEffect];
+            activeEffect += dir;
+        }
+        else if (dir == -1)
+        {
+            activeEffect += dir;
+            effectArray = slides[activeSlide][&quot;effects&quot;][activeEffect];
+        }
+
+        transCounter = 0;
+        startTime = (new Date()).getTime();
+        lastFrameTime = null;
+        effect(dir);
+    }
+    else if (((dir == 1) &amp;&amp; (activeSlide &lt; (slides.length - 1))) || (((dir == -1) &amp;&amp; (activeSlide &gt; 0))))
+    {
+        changeSlide(dir);
+    }
+}
+
+/** Function to skip effects and directly either put the slide into start or end state or change slides.
+ *
+ *  @param dir direction of the change (1 = forwards, -1 = backwards)
+ */
+function skipEffects(dir)
+{
+    if (slides[activeSlide][&quot;effects&quot;] &amp;&amp; (((dir == 1) &amp;&amp; (activeEffect &lt; slides[activeSlide][&quot;effects&quot;].length)) || ((dir == -1) &amp;&amp; (activeEffect &gt; 0))))
+    {
+        processingEffect = true;
+
+        if (slides[activeSlide][&quot;effects&quot;] &amp;&amp; (dir == 1))
+            activeEffect = slides[activeSlide][&quot;effects&quot;].length;
+        else
+            activeEffect = 0;
+
+        if (dir == 1)
+            setSlideToState(activeSlide, STATE_END);
+        else
+            setSlideToState(activeSlide, STATE_START);
+
+        processingEffect = false;
+    }
+    else if (((dir == 1) &amp;&amp; (activeSlide &lt; (slides.length - 1))) || (((dir == -1) &amp;&amp; (activeSlide &gt; 0))))
+    {
+        changeSlide(dir);
+    }
+}
+
+/** Function to change between slides.
+ *
+ *  @param dir direction (1 = forwards, -1 = backwards)
+ */
+function changeSlide(dir)
+{
+    processingEffect = true;
+    effectArray = new Array();
+
+    effectArray[0] = new Object();
+    if (dir == 1)
+    {
+        effectArray[0][&quot;effect&quot;] = slides[activeSlide][&quot;transitionOut&quot;][&quot;name&quot;];
+        effectArray[0][&quot;options&quot;] = slides[activeSlide][&quot;transitionOut&quot;][&quot;options&quot;];
+        effectArray[0][&quot;dir&quot;] = -1;
+    }
+    else if (dir == -1)
+    {
+        effectArray[0][&quot;effect&quot;] = slides[activeSlide][&quot;transitionIn&quot;][&quot;name&quot;];
+        effectArray[0][&quot;options&quot;] = slides[activeSlide][&quot;transitionIn&quot;][&quot;options&quot;];
+        effectArray[0][&quot;dir&quot;] = 1;
+    }
+    effectArray[0][&quot;element&quot;] = slides[activeSlide][&quot;element&quot;];
+
+    activeSlide += dir;
+    setProgressBarValue(activeSlide);
+
+    effectArray[1] = new Object();
+
+    if (dir == 1)
+    {
+        effectArray[1][&quot;effect&quot;] = slides[activeSlide][&quot;transitionIn&quot;][&quot;name&quot;];
+        effectArray[1][&quot;options&quot;] = slides[activeSlide][&quot;transitionIn&quot;][&quot;options&quot;];
+        effectArray[1][&quot;dir&quot;] = 1;
+    }
+    else if (dir == -1)
+    {
+        effectArray[1][&quot;effect&quot;] = slides[activeSlide][&quot;transitionOut&quot;][&quot;name&quot;];
+        effectArray[1][&quot;options&quot;] = slides[activeSlide][&quot;transitionOut&quot;][&quot;options&quot;];
+        effectArray[1][&quot;dir&quot;] = -1;
+    }
+
+    effectArray[1][&quot;element&quot;] = slides[activeSlide][&quot;element&quot;];
+
+    if (slides[activeSlide][&quot;effects&quot;] &amp;&amp; (dir == -1))
+        activeEffect = slides[activeSlide][&quot;effects&quot;].length;
+    else
+        activeEffect = 0;
+
+    if (dir == -1)
+        setSlideToState(activeSlide, STATE_END);
+    else
+        setSlideToState(activeSlide, STATE_START);
+
+    transCounter = 0;
+    startTime = (new Date()).getTime();
+    lastFrameTime = null;
+    effect(dir);
+}
+
+/** Function to toggle between index and slide mode.
+*/
+function toggleSlideIndex()
+{
+    var suspendHandle = ROOT_NODE.suspendRedraw(500);
+
+    if (currentMode == SLIDE_MODE)
+    {
+        hideProgressBar();
+        INDEX_OFFSET = -1;
+        indexSetPageSlide(activeSlide);
+        currentMode = INDEX_MODE;
+    }
+    else if (currentMode == INDEX_MODE)
+    {
+        for (var counter = 0; counter &lt; slides.length; counter++)
+        {
+            slides[counter][&quot;element&quot;].setAttribute(&quot;transform&quot;,&quot;scale(1)&quot;);
+
+            if (counter == activeSlide)
+            {
+                slides[counter][&quot;element&quot;].style.display = &quot;inherit&quot;;
+                slides[counter][&quot;element&quot;].setAttribute(&quot;opacity&quot;,1);
+                activeEffect = 0;
+            }
+            else
+            {
+                slides[counter][&quot;element&quot;].setAttribute(&quot;opacity&quot;,0);
+                slides[counter][&quot;element&quot;].style.display = &quot;none&quot;;
+            }
+        }
+        currentMode = SLIDE_MODE;
+        setSlideToState(activeSlide, STATE_START);
+        setProgressBarValue(activeSlide);
+
+        if (progress_bar_visible)
+        {
+            showProgressBar();
+        }
+    }
+
+    ROOT_NODE.unsuspendRedraw(suspendHandle);
+    ROOT_NODE.forceRedraw();
+}
+
+/** Function to run an effect.
+ *
+ *  @param dir direction in which to play the effect (1 = forwards, -1 = backwards)
+ */
+function effect(dir)
+{
+    var done = true;
+
+    var suspendHandle = ROOT_NODE.suspendRedraw(200);
+
+    for (var counter = 0; counter &lt; effectArray.length; counter++)
+    {
+        if (effectArray[counter][&quot;effect&quot;] == &quot;fade&quot;)
+            done &amp;= fade(parseInt(effectArray[counter][&quot;dir&quot;]) * dir, effectArray[counter][&quot;element&quot;], transCounter, effectArray[counter][&quot;options&quot;]);
+        else if (effectArray[counter][&quot;effect&quot;] == &quot;appear&quot;)
+            done &amp;= appear(parseInt(effectArray[counter][&quot;dir&quot;]) * dir, effectArray[counter][&quot;element&quot;], transCounter, effectArray[counter][&quot;options&quot;]);
+        else if (effectArray[counter][&quot;effect&quot;] == &quot;pop&quot;)
+            done &amp;= pop(parseInt(effectArray[counter][&quot;dir&quot;]) * dir, effectArray[counter][&quot;element&quot;], transCounter, effectArray[counter][&quot;options&quot;]);
+        else if (effectArray[counter][&quot;effect&quot;] == &quot;view&quot;)
+            done &amp;= view(parseInt(effectArray[counter][&quot;dir&quot;]) * dir, effectArray[counter][&quot;element&quot;], transCounter, effectArray[counter][&quot;options&quot;]);
+    }
+
+    ROOT_NODE.unsuspendRedraw(suspendHandle);
+    ROOT_NODE.forceRedraw();
+
+    if (!done)
+    {
+        var currentTime = (new Date()).getTime();
+        var timeDiff = 1;
+
+        transCounter = currentTime - startTime;
+
+        if (lastFrameTime != null)
+        {
+            timeDiff = timeStep - (currentTime - lastFrameTime);
+
+            if (timeDiff &lt;= 0)
+                timeDiff = 1;
+        }
+
+        lastFrameTime = currentTime;
+
+        window.setTimeout(&quot;effect(&quot; + dir + &quot;)&quot;, timeDiff);
+    }
+    else
+    {
+        window.location.hash = (activeSlide + 1) + '_' + activeEffect;
+        processingEffect = false;
+    }
+}
+
+/** Function to display the index sheet.
+ *
+ *  @param offsetNumber offset number
+ */
+function displayIndex(offsetNumber)
+{
+    var offsetX = 0;
+    var offsetY = 0;
+
+    if (offsetNumber &lt; 0)
+        offsetNumber = 0;
+    else if (offsetNumber &gt;= slides.length)
+        offsetNumber = slides.length - 1;
+
+    for (var counter = 0; counter &lt; slides.length; counter++)
+    {
+        if ((counter &lt; offsetNumber) || (counter &gt; offsetNumber + INDEX_COLUMNS * INDEX_COLUMNS - 1))
+        {
+            slides[counter][&quot;element&quot;].setAttribute(&quot;opacity&quot;,0);
+            slides[counter][&quot;element&quot;].style.display = &quot;none&quot;;
+        }
+        else
+        {
+            offsetX = ((counter - offsetNumber) % INDEX_COLUMNS) * WIDTH;
+            offsetY = Math.floor((counter - offsetNumber) / INDEX_COLUMNS) * HEIGHT;
+
+            slides[counter][&quot;element&quot;].setAttribute(&quot;transform&quot;,&quot;scale(&quot;+1/INDEX_COLUMNS+&quot;) translate(&quot;+offsetX+&quot;,&quot;+offsetY+&quot;)&quot;);
+            slides[counter][&quot;element&quot;].style.display = &quot;inherit&quot;;
+            slides[counter][&quot;element&quot;].setAttribute(&quot;opacity&quot;,0.5);
+        }
+
+        setSlideToState(counter, STATE_END);
+    }
+
+    //do we need to save the current offset?
+    if (INDEX_OFFSET != offsetNumber)
+        INDEX_OFFSET = offsetNumber;
+}
+
+/** Function to set the active slide in the slide view.
+ *
+ *  @param nbr index of the active slide
+ */
+function slideSetActiveSlide(nbr)
+{
+    if (nbr &gt;= slides.length)
+        nbr = slides.length - 1;
+    else if (nbr &lt; 0)
+        nbr = 0;
+
+    slides[activeSlide][&quot;element&quot;].setAttribute(&quot;opacity&quot;,0);
+    slides[activeSlide][&quot;element&quot;].style.display = &quot;none&quot;;
+
+    activeSlide = parseInt(nbr);
+
+    setSlideToState(activeSlide, STATE_START);
+    slides[activeSlide][&quot;element&quot;].style.display = &quot;inherit&quot;;
+    slides[activeSlide][&quot;element&quot;].setAttribute(&quot;opacity&quot;,1);
+
+    activeEffect = 0;
+    setProgressBarValue(nbr);
+}
+
+/** Function to set the active slide in the index view.
+ *
+ *  @param nbr index of the active slide
+ */
+function indexSetActiveSlide(nbr)
+{
+    if (nbr &gt;= slides.length)
+        nbr = slides.length - 1;
+    else if (nbr &lt; 0)
+        nbr = 0;
+
+    slides[activeSlide][&quot;element&quot;].setAttribute(&quot;opacity&quot;,0.5);
+
+    activeSlide = parseInt(nbr);
+    window.location.hash = (activeSlide + 1) + '_0';
+
+    slides[activeSlide][&quot;element&quot;].setAttribute(&quot;opacity&quot;,1);
+}
+
+/** Function to set the page and active slide in index view.
+ *
+ *  @param nbr index of the active slide
+ *
+ *  NOTE: To force a redraw,
+ *  set INDEX_OFFSET to -1 before calling indexSetPageSlide().
+ *
+ *  This is necessary for zooming (otherwise the index might not
+ *  get redrawn) and when switching to index mode.
+ *
+ *  INDEX_OFFSET = -1
+ *  indexSetPageSlide(activeSlide);
+ */
+function indexSetPageSlide(nbr)
+{
+    if (nbr &gt;= slides.length)
+        nbr = slides.length - 1;
+    else if (nbr &lt; 0)
+        nbr = 0;
+
+    //calculate the offset
+    var offset = nbr - nbr % (INDEX_COLUMNS * INDEX_COLUMNS);
+
+    if (offset &lt; 0)
+        offset = 0;
+
+    //if different from kept offset, then record and change the page
+    if (offset != INDEX_OFFSET)
+    {
+        INDEX_OFFSET = offset;
+        displayIndex(INDEX_OFFSET);
+    }
+
+    //set the active slide
+    indexSetActiveSlide(nbr);
+}
+
+/** Event handler for key press.
+ *
+ *  @param e the event
+ */
+function keydown(e)
+{
+    if (!e)
+        e = window.event;
+
+    code = e.keyCode || e.charCode;
+
+    if (!processingEffect &amp;&amp; keyCodeDictionary[currentMode] &amp;&amp; keyCodeDictionary[currentMode][code])
+        return keyCodeDictionary[currentMode][code]();
+    else
+        document.onkeypress = keypress;
+}
+// Set event handler for key down.
+document.onkeydown = keydown;
+
+/** Event handler for key press.
+ *
+ *  @param e the event
+ */
+function keypress(e)
+{
+    document.onkeypress = null;
+
+    if (!e)
+        e = window.event;
+
+    str = String.fromCharCode(e.keyCode || e.charCode);
+
+    if (!processingEffect &amp;&amp; charCodeDictionary[currentMode] &amp;&amp; charCodeDictionary[currentMode][str])
+        return charCodeDictionary[currentMode][str]();
+}
+
+/** Function to supply the default char code dictionary.
+ *
+ * @returns default char code dictionary
+ */
+function getDefaultCharCodeDictionary()
+{
+    var charCodeDict = new Object();
+
+    charCodeDict[SLIDE_MODE] = new Object();
+    charCodeDict[INDEX_MODE] = new Object();
+    charCodeDict[DRAWING_MODE] = new Object();
+
+    charCodeDict[SLIDE_MODE][&quot;i&quot;] = function () { return toggleSlideIndex(); };
+    charCodeDict[SLIDE_MODE][&quot;d&quot;] = function () { return slideSwitchToDrawingMode(); };
+    charCodeDict[SLIDE_MODE][&quot;D&quot;] = function () { return slideQueryDuration(); };
+    charCodeDict[SLIDE_MODE][&quot;n&quot;] = function () { return slideAddSlide(activeSlide); };
+    charCodeDict[SLIDE_MODE][&quot;p&quot;] = function () { return slideToggleProgressBarVisibility(); };
+    charCodeDict[SLIDE_MODE][&quot;t&quot;] = function () { return slideResetTimer(); };
+    charCodeDict[SLIDE_MODE][&quot;e&quot;] = function () { return slideUpdateExportLayer(); };
+
+    charCodeDict[DRAWING_MODE][&quot;d&quot;] = function () { return drawingSwitchToSlideMode(); };
+    charCodeDict[DRAWING_MODE][&quot;0&quot;] = function () { return drawingResetPathWidth(); };
+    charCodeDict[DRAWING_MODE][&quot;1&quot;] = function () { return drawingSetPathWidth(1.0); };
+    charCodeDict[DRAWING_MODE][&quot;3&quot;] = function () { return drawingSetPathWidth(3.0); };
+    charCodeDict[DRAWING_MODE][&quot;5&quot;] = function () { return drawingSetPathWidth(5.0); };
+    charCodeDict[DRAWING_MODE][&quot;7&quot;] = function () { return drawingSetPathWidth(7.0); };
+    charCodeDict[DRAWING_MODE][&quot;9&quot;] = function () { return drawingSetPathWidth(9.0); };
+    charCodeDict[DRAWING_MODE][&quot;b&quot;] = function () { return drawingSetPathColour(&quot;blue&quot;); };
+    charCodeDict[DRAWING_MODE][&quot;c&quot;] = function () { return drawingSetPathColour(&quot;cyan&quot;); };
+    charCodeDict[DRAWING_MODE][&quot;g&quot;] = function () { return drawingSetPathColour(&quot;green&quot;); };
+    charCodeDict[DRAWING_MODE][&quot;k&quot;] = function () { return drawingSetPathColour(&quot;black&quot;); };
+    charCodeDict[DRAWING_MODE][&quot;m&quot;] = function () { return drawingSetPathColour(&quot;magenta&quot;); };
+    charCodeDict[DRAWING_MODE][&quot;o&quot;] = function () { return drawingSetPathColour(&quot;orange&quot;); };
+    charCodeDict[DRAWING_MODE][&quot;r&quot;] = function () { return drawingSetPathColour(&quot;red&quot;); };
+    charCodeDict[DRAWING_MODE][&quot;w&quot;] = function () { return drawingSetPathColour(&quot;white&quot;); };
+    charCodeDict[DRAWING_MODE][&quot;y&quot;] = function () { return drawingSetPathColour(&quot;yellow&quot;); };
+    charCodeDict[DRAWING_MODE][&quot;z&quot;] = function () { return drawingUndo(); };
+
+    charCodeDict[INDEX_MODE][&quot;i&quot;] = function () { return toggleSlideIndex(); };
+    charCodeDict[INDEX_MODE][&quot;-&quot;] = function () { return indexDecreaseNumberOfColumns(); };
+    charCodeDict[INDEX_MODE][&quot;=&quot;] = function () { return indexIncreaseNumberOfColumns(); };
+    charCodeDict[INDEX_MODE][&quot;+&quot;] = function () { return indexIncreaseNumberOfColumns(); };
+    charCodeDict[INDEX_MODE][&quot;0&quot;] = function () { return indexResetNumberOfColumns(); };
+
+    return charCodeDict;
+}
+
+/** Function to supply the default key code dictionary.
+ *
+ * @returns default key code dictionary
+ */
+function getDefaultKeyCodeDictionary()
+{
+    var keyCodeDict = new Object();
+
+    keyCodeDict[SLIDE_MODE] = new Object();
+    keyCodeDict[INDEX_MODE] = new Object();
+    keyCodeDict[DRAWING_MODE] = new Object();
+
+    keyCodeDict[SLIDE_MODE][LEFT_KEY] = function() { return dispatchEffects(-1); };
+    keyCodeDict[SLIDE_MODE][RIGHT_KEY] = function() { return dispatchEffects(1); };
+    keyCodeDict[SLIDE_MODE][UP_KEY] = function() { return skipEffects(-1); };
+    keyCodeDict[SLIDE_MODE][DOWN_KEY] = function() { return skipEffects(1); };
+    keyCodeDict[SLIDE_MODE][PAGE_UP_KEY] = function() { return dispatchEffects(-1); };
+    keyCodeDict[SLIDE_MODE][PAGE_DOWN_KEY] = function() { return dispatchEffects(1); };
+    keyCodeDict[SLIDE_MODE][HOME_KEY] = function() { return slideSetActiveSlide(0); };
+    keyCodeDict[SLIDE_MODE][END_KEY] = function() { return slideSetActiveSlide(slides.length - 1); };
+    keyCodeDict[SLIDE_MODE][SPACE_KEY] = function() { return dispatchEffects(1); };
+
+    keyCodeDict[INDEX_MODE][LEFT_KEY] = function() { return indexSetPageSlide(activeSlide - 1); };
+    keyCodeDict[INDEX_MODE][RIGHT_KEY] = function() { return indexSetPageSlide(activeSlide + 1); };
+    keyCodeDict[INDEX_MODE][UP_KEY] = function() { return indexSetPageSlide(activeSlide - INDEX_COLUMNS); };
+    keyCodeDict[INDEX_MODE][DOWN_KEY] = function() { return indexSetPageSlide(activeSlide + INDEX_COLUMNS); };
+    keyCodeDict[INDEX_MODE][PAGE_UP_KEY] = function() { return indexSetPageSlide(activeSlide - INDEX_COLUMNS * INDEX_COLUMNS); };
+    keyCodeDict[INDEX_MODE][PAGE_DOWN_KEY] = function() { return indexSetPageSlide(activeSlide + INDEX_COLUMNS * INDEX_COLUMNS); };
+    keyCodeDict[INDEX_MODE][HOME_KEY] = function() { return indexSetPageSlide(0); };
+    keyCodeDict[INDEX_MODE][END_KEY] = function() { return indexSetPageSlide(slides.length - 1); };
+    keyCodeDict[INDEX_MODE][ENTER_KEY] = function() { return toggleSlideIndex(); };
+
+    keyCodeDict[DRAWING_MODE][ESCAPE_KEY] = function () { return drawingSwitchToSlideMode(); };
+
+    return keyCodeDict;
+}
+
+/** Function to handle all mouse events.
+ *
+ *    @param    evnt    event
+ *    @param    action    type of event (e.g. mouse up, mouse wheel)
+ */
+function mouseHandlerDispatch(evnt, action)
+{
+    if (!evnt)
+        evnt = window.event;
+
+    var retVal = true;
+
+    if (!processingEffect &amp;&amp; mouseHandlerDictionary[currentMode] &amp;&amp; mouseHandlerDictionary[currentMode][action])
+    {
+        var subRetVal = mouseHandlerDictionary[currentMode][action](evnt);
+
+        if (subRetVal != null &amp;&amp; subRetVal != undefined)
+            retVal = subRetVal;
+    }
+
+    if (evnt.preventDefault &amp;&amp; !retVal)
+        evnt.preventDefault();
+
+    evnt.returnValue = retVal;
+
+    return retVal;
+}
+
+// Set mouse event handler.
+document.onmousedown = function(e) { return mouseHandlerDispatch(e, MOUSE_DOWN); };
+document.onmouseup = function(e) { return mouseHandlerDispatch(e, MOUSE_UP); };
+document.onmousemove = function(e) { return mouseHandlerDispatch(e, MOUSE_MOVE); };
+
+// Moz
+if (window.addEventListener)
+{
+    window.addEventListener('DOMMouseScroll', function(e) { return mouseHandlerDispatch(e, MOUSE_WHEEL); }, false);
+}
+
+// Opera Safari OK - may not work in IE
+window.onmousewheel = function(e) { return mouseHandlerDispatch(e, MOUSE_WHEEL); };
+
+/** Function to supply the default mouse handler dictionary.
+ *
+ * @returns default mouse handler dictionary
+ */
+function getDefaultMouseHandlerDictionary()
+{
+    var mouseHandlerDict = new Object();
+
+    mouseHandlerDict[SLIDE_MODE] = new Object();
+    mouseHandlerDict[INDEX_MODE] = new Object();
+    mouseHandlerDict[DRAWING_MODE] = new Object();
+
+    mouseHandlerDict[SLIDE_MODE][MOUSE_DOWN] = function(evnt) { return dispatchEffects(1); };
+    mouseHandlerDict[SLIDE_MODE][MOUSE_WHEEL] = function(evnt) { return slideMousewheel(evnt); };
+
+    mouseHandlerDict[INDEX_MODE][MOUSE_DOWN] = function(evnt) { return toggleSlideIndex(); };
+
+    mouseHandlerDict[DRAWING_MODE][MOUSE_DOWN] = function(evnt) { return drawingMousedown(evnt); };
+    mouseHandlerDict[DRAWING_MODE][MOUSE_UP] = function(evnt) { return drawingMouseup(evnt); };
+    mouseHandlerDict[DRAWING_MODE][MOUSE_MOVE] = function(evnt) { return drawingMousemove(evnt); };
+
+    return mouseHandlerDict;
+}
+
+/** Function to switch from slide mode to drawing mode.
+*/
+function slideSwitchToDrawingMode()
+{
+    currentMode = DRAWING_MODE;
+
+    var tempDict;
+
+    if (ROOT_NODE.hasAttribute(&quot;style&quot;))
+        tempDict = propStrToDict(ROOT_NODE.getAttribute(&quot;style&quot;));
+    else
+        tempDict = new Object();
+
+    tempDict[&quot;cursor&quot;] = &quot;crosshair&quot;;
+    ROOT_NODE.setAttribute(&quot;style&quot;, dictToPropStr(tempDict));
+}
+
+/** Function to switch from drawing mode to slide mode.
+*/
+function drawingSwitchToSlideMode()
+{
+    currentMode = SLIDE_MODE;
+
+    var tempDict;
+
+    if (ROOT_NODE.hasAttribute(&quot;style&quot;))
+        tempDict = propStrToDict(ROOT_NODE.getAttribute(&quot;style&quot;));
+    else
+        tempDict = new Object();
+
+    tempDict[&quot;cursor&quot;] = &quot;auto&quot;;
+    ROOT_NODE.setAttribute(&quot;style&quot;, dictToPropStr(tempDict));
+}
+
+/** Function to decrease the number of columns in index mode.
+*/
+function indexDecreaseNumberOfColumns()
+{
+    if (INDEX_COLUMNS &gt;= 3)
+    {
+        INDEX_COLUMNS -= 1;
+        INDEX_OFFSET = -1
+            indexSetPageSlide(activeSlide);
+    }
+}
+
+/** Function to increase the number of columns in index mode.
+*/
+function indexIncreaseNumberOfColumns()
+{
+    if (INDEX_COLUMNS &lt; 7)
+    {
+        INDEX_COLUMNS += 1;
+        INDEX_OFFSET = -1
+            indexSetPageSlide(activeSlide);
+    }
+}
+
+/** Function to reset the number of columns in index mode.
+*/
+function indexResetNumberOfColumns()
+{
+    if (INDEX_COLUMNS != INDEX_COLUMNS_DEFAULT)
+    {
+        INDEX_COLUMNS = INDEX_COLUMNS_DEFAULT;
+        INDEX_OFFSET = -1
+            indexSetPageSlide(activeSlide);
+    }
+}
+
+/** Function to reset path width in drawing mode.
+*/
+function drawingResetPathWidth()
+{
+    path_width = path_width_default;
+    set_path_paint_width();
+}
+
+/** Function to set path width in drawing mode.
+ *
+ * @param width new path width
+ */
+function drawingSetPathWidth(width)
+{
+    path_width = width;
+    set_path_paint_width();
+}
+
+/** Function to set path colour in drawing mode.
+ *
+ * @param colour new path colour
+ */
+function drawingSetPathColour(colour)
+{
+    path_colour = colour;
+}
+
+/** Function to query the duration of the presentation from the user in slide mode.
+*/
+function slideQueryDuration()
+{
+    var new_duration = prompt(&quot;Length of presentation in minutes?&quot;, timer_duration);
+
+    if ((new_duration != null) &amp;&amp; (new_duration != ''))
+    {
+        timer_duration = new_duration;
+    }
+
+    updateTimer();
+}
+
+/** Function to add new slide in slide mode.
+ *
+ * @param afterSlide after which slide to insert the new one
+ */
+function slideAddSlide(afterSlide)
+{
+    addSlide(afterSlide);
+    slideSetActiveSlide(afterSlide + 1);
+    updateTimer();
+}
+
+/** Function to toggle the visibility of the progress bar in slide mode.
+*/
+function slideToggleProgressBarVisibility()
+{
+    if (progress_bar_visible)
+    {
+        progress_bar_visible = false;
+        hideProgressBar();
+    }
+    else
+    {
+        progress_bar_visible = true;
+        showProgressBar();
+    }
+}
+
+/** Function to reset the timer in slide mode.
+*/
+function slideResetTimer()
+{
+    timer_start = timer_elapsed;
+    updateTimer();
+}
+
+/** Convenience function to pad a string with zero in front up to a certain length.
+ */
+function padString(str, len)
+{
+    var outStr = str;
+
+    while (outStr.length &lt; len)
+    {
+        outStr = '0' + outStr;
+    }
+
+    return outStr;
+}
+
+/** Function to update the export layer.
+ */
+function slideUpdateExportLayer()
+{
+    // Suspend redraw since we are going to mess with the slides.
+    var suspendHandle = ROOT_NODE.suspendRedraw(2000);
+
+    var tmpActiveSlide = activeSlide;
+    var tmpActiveEffect = activeEffect;
+    var exportedLayers = new Array();
+
+    for (var counterSlides = 0; counterSlides &lt; slides.length; counterSlides++)
+    {
+        var exportNode;
+
+        setSlideToState(counterSlides, STATE_START);
+
+        var maxEffect = 0;
+
+        if (slides[counterSlides].effects)
+        {
+            maxEffect = slides[counterSlides].effects.length;
+        }
+
+        exportNode = slides[counterSlides].element.cloneNode(true);
+        exportNode.setAttributeNS(NSS[&quot;inkscape&quot;], &quot;groupmode&quot;, &quot;layer&quot;);
+        exportNode.setAttributeNS(NSS[&quot;inkscape&quot;], &quot;label&quot;, &quot;slide_&quot; + padString((counterSlides + 1).toString(), slides.length.toString().length) + &quot;_effect_&quot; + padString(&quot;0&quot;, maxEffect.toString().length));
+
+        exportedLayers.push(exportNode);
+
+        if (slides[counterSlides][&quot;effects&quot;])
+        {
+            for (var counter = 0; counter &lt; slides[counterSlides][&quot;effects&quot;].length; counter++)
+            {
+                for (var subCounter = 0; subCounter &lt; slides[counterSlides][&quot;effects&quot;][counter].length; subCounter++)
+                {
+                    var effect = slides[counterSlides][&quot;effects&quot;][counter][subCounter];
+                    if (effect[&quot;effect&quot;] == &quot;fade&quot;)
+                        fade(parseInt(effect[&quot;dir&quot;]), effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;appear&quot;)
+                        appear(parseInt(effect[&quot;dir&quot;]), effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;pop&quot;)
+                        pop(parseInt(effect[&quot;dir&quot;]), effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;view&quot;)
+                        view(parseInt(effect[&quot;dir&quot;]), effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                }
+
+                var layerName = &quot;slide_&quot; + padString((counterSlides + 1).toString(), slides.length.toString().length) + &quot;_effect_&quot; + padString((counter + 1).toString(), maxEffect.toString().length);
+                exportNode = slides[counterSlides].element.cloneNode(true);
+                exportNode.setAttributeNS(NSS[&quot;inkscape&quot;], &quot;groupmode&quot;, &quot;layer&quot;);
+                exportNode.setAttributeNS(NSS[&quot;inkscape&quot;], &quot;label&quot;, layerName);
+                exportNode.setAttribute(&quot;id&quot;, layerName);
+
+                exportedLayers.push(exportNode);
+            }
+        }
+    }
+
+    activeSlide = tmpActiveSlide;
+    activeEffect = tmpActiveEffect;
+    setSlideToState(activeSlide, activeEffect);
+
+    // Copy image.
+    var newDoc = document.documentElement.cloneNode(true);
+
+    // Delete viewbox form new imag and set width and height.
+    newDoc.removeAttribute('viewbox');
+    newDoc.setAttribute('width', WIDTH);
+    newDoc.setAttribute('height', HEIGHT);
+
+    // Delete all layers and script elements.
+    var nodesToBeRemoved = new Array();
+
+    for (var childCounter = 0; childCounter &lt;  newDoc.childNodes.length; childCounter++)
+    {
+        var child = newDoc.childNodes[childCounter];
+
+        if (child.nodeType == 1)
+        {
+            if ((child.nodeName.toUpperCase() == 'G') || (child.nodeName.toUpperCase() == 'SCRIPT'))
+            {
+                nodesToBeRemoved.push(child);
+            }
+        }
+    }
+
+    for (var ndCounter = 0; ndCounter &lt; nodesToBeRemoved.length; ndCounter++)
+    {
+        var nd = nodesToBeRemoved[ndCounter];
+
+        // Before removing the node, check whether it contains any definitions.
+        var defs = nd.getElementsByTagNameNS(NSS[&quot;svg&quot;], &quot;defs&quot;);
+
+        for (var defsCounter = 0; defsCounter &lt; defs.length; defsCounter++)
+        {
+            if (defs[defsCounter].id)
+            {
+                newDoc.appendChild(defs[defsCounter].cloneNode(true));
+            }
+        }
+
+        // Remove node.
+        nd.parentNode.removeChild(nd);
+    }
+
+    // Set current layer.
+    if (exportedLayers[0])
+    {
+        var namedView;
+
+        for (var nodeCounter = 0; nodeCounter &lt; newDoc.childNodes.length; nodeCounter++)
+        {
+            if ((newDoc.childNodes[nodeCounter].nodeType == 1) &amp;&amp; (newDoc.childNodes[nodeCounter].getAttribute('id') == 'base'))
+            {
+                namedView = newDoc.childNodes[nodeCounter];
+            }
+        }
+
+        if (namedView)
+        {
+            namedView.setAttributeNS(NSS['inkscape'], 'current-layer', exportedLayers[0].getAttributeNS(NSS['inkscape'], 'label'));
+        }
+    }
+
+    // Add exported layers.
+    while (exportedLayers.length &gt; 0)
+    {
+        var nd = exportedLayers.pop();
+
+        nd.setAttribute(&quot;opacity&quot;,1);
+        nd.style.display = &quot;inherit&quot;;
+
+        newDoc.appendChild(nd);
+    }
+
+    // Serialise the new document.
+  window.location = 'data:application/svg+xml;base64;charset=utf-8,' + window.btoa(unescape(encodeURIComponent((new XMLSerializer()).serializeToString(newDoc))));
+
+    // Unsuspend redraw.
+    ROOT_NODE.unsuspendRedraw(suspendHandle);
+    ROOT_NODE.forceRedraw();
+}
+
+/** Function to undo last drawing operation.
+*/
+function drawingUndo()
+{
+    mouse_presentation_path = null;
+    mouse_original_path = null;
+
+    if (history_presentation_elements.length &gt; 0)
+    {
+        var p = history_presentation_elements.pop();
+        var parent = p.parentNode.removeChild(p);
+
+        p = history_original_elements.pop();
+        parent = p.parentNode.removeChild(p);
+    }
+}
+
+/** Event handler for mouse down in drawing mode.
+ *
+ *  @param e the event
+ */
+function drawingMousedown(e)
+{
+    var value = 0;
+
+    if (e.button)
+        value = e.button;
+    else if (e.which)
+        value = e.which;
+
+    if (value == 1)
+    {
+        history_counter++;
+
+        var p = calcCoord(e);
+
+        mouse_last_x = e.clientX;
+        mouse_last_y = e.clientY;
+        mouse_original_path = document.createElementNS(NSS[&quot;svg&quot;], &quot;path&quot;);
+        mouse_original_path.setAttribute(&quot;stroke&quot;, path_colour);
+        mouse_original_path.setAttribute(&quot;stroke-width&quot;, path_paint_width);
+        mouse_original_path.setAttribute(&quot;fill&quot;, &quot;none&quot;);
+        mouse_original_path.setAttribute(&quot;id&quot;, &quot;path &quot; + Date());
+        mouse_original_path.setAttribute(&quot;d&quot;, &quot;M&quot; + p.x + &quot;,&quot; + p.y);
+        slides[activeSlide][&quot;original_element&quot;].appendChild(mouse_original_path);
+        history_original_elements.push(mouse_original_path);
+
+        mouse_presentation_path = document.createElementNS(NSS[&quot;svg&quot;], &quot;path&quot;);
+        mouse_presentation_path.setAttribute(&quot;stroke&quot;, path_colour);
+        mouse_presentation_path.setAttribute(&quot;stroke-width&quot;, path_paint_width);
+        mouse_presentation_path.setAttribute(&quot;fill&quot;, &quot;none&quot;);
+        mouse_presentation_path.setAttribute(&quot;id&quot;, &quot;path &quot; + Date() + &quot; presentation copy&quot;);
+        mouse_presentation_path.setAttribute(&quot;d&quot;, &quot;M&quot; + p.x + &quot;,&quot; + p.y);
+
+        if (slides[activeSlide][&quot;viewGroup&quot;])
+            slides[activeSlide][&quot;viewGroup&quot;].appendChild(mouse_presentation_path);
+        else
+            slides[activeSlide][&quot;element&quot;].appendChild(mouse_presentation_path);
+
+        history_presentation_elements.push(mouse_presentation_path);
+
+        return false;
+    }
+
+    return true;
+}
+
+/** Event handler for mouse up in drawing mode.
+ *
+ *  @param e the event
+ */
+function drawingMouseup(e)
+{
+    if(!e)
+        e = window.event;
+
+    if (mouse_presentation_path != null)
+    {
+        var p = calcCoord(e);
+        var d = mouse_presentation_path.getAttribute(&quot;d&quot;);
+        d += &quot; L&quot; + p.x + &quot;,&quot; + p.y;
+        mouse_presentation_path.setAttribute(&quot;d&quot;, d);
+        mouse_presentation_path = null;
+        mouse_original_path.setAttribute(&quot;d&quot;, d);
+        mouse_original_path = null;
+
+        return false;
+    }
+
+    return true;
+}
+
+/** Event handler for mouse move in drawing mode.
+ *
+ *  @param e the event
+ */
+function drawingMousemove(e)
+{
+    if(!e)
+        e = window.event;
+
+    var dist = (mouse_last_x - e.clientX) * (mouse_last_x - e.clientX) + (mouse_last_y - e.clientY) * (mouse_last_y - e.clientY);
+
+    if (mouse_presentation_path == null)
+    {
+        return true;
+    }
+
+    if (dist &gt;= mouse_min_dist_sqr)
+    {
+        var p = calcCoord(e);
+        var d = mouse_presentation_path.getAttribute(&quot;d&quot;);
+        d += &quot; L&quot; + p.x + &quot;,&quot; + p.y;
+        mouse_presentation_path.setAttribute(&quot;d&quot;, d);
+        mouse_original_path.setAttribute(&quot;d&quot;, d);
+        mouse_last_x = e.clientX;
+        mouse_last_y = e.clientY;
+    }
+
+    return false;
+}
+
+/** Event handler for mouse wheel events in slide mode.
+ *  based on http://adomas.org/javascript-mouse-wheel/
+ *
+ *  @param e the event
+ */
+function slideMousewheel(e)
+{
+    var delta = 0;
+
+    if (!e)
+        e = window.event;
+
+    if (e.wheelDelta)
+    { // IE Opera
+        delta = e.wheelDelta/120;
+    }
+    else if (e.detail)
+    { // MOZ
+        delta = -e.detail/3;
+    }
+
+    if (delta &gt; 0)
+        skipEffects(-1);
+    else if (delta &lt; 0)
+        skipEffects(1);
+
+    if (e.preventDefault)
+        e.preventDefault();
+
+    e.returnValue = false;
+}
+
+/** Event handler for mouse wheel events in index mode.
+ *  based on http://adomas.org/javascript-mouse-wheel/
+ *
+ *  @param e the event
+ */
+function indexMousewheel(e)
+{
+    var delta = 0;
+
+    if (!e)
+        e = window.event;
+
+    if (e.wheelDelta)
+    { // IE Opera
+        delta = e.wheelDelta/120;
+    }
+    else if (e.detail)
+    { // MOZ
+        delta = -e.detail/3;
+    }
+
+    if (delta &gt; 0)
+        indexSetPageSlide(activeSlide - INDEX_COLUMNS * INDEX_COLUMNS);
+    else if (delta &lt; 0)
+        indexSetPageSlide(activeSlide + INDEX_COLUMNS * INDEX_COLUMNS);
+
+    if (e.preventDefault)
+        e.preventDefault();
+
+    e.returnValue = false;
+}
+
+/** Function to set the path paint width.
+*/
+function set_path_paint_width()
+{
+    var svgPoint1 = document.documentElement.createSVGPoint();
+    var svgPoint2 = document.documentElement.createSVGPoint();
+
+    svgPoint1.x = 0.0;
+    svgPoint1.y = 0.0;
+    svgPoint2.x = 1.0;
+    svgPoint2.y = 0.0;
+
+    var matrix = slides[activeSlide][&quot;element&quot;].getTransformToElement(ROOT_NODE);
+
+    if (slides[activeSlide][&quot;viewGroup&quot;])
+        matrix = slides[activeSlide][&quot;viewGroup&quot;].getTransformToElement(ROOT_NODE);
+
+    svgPoint1 = svgPoint1.matrixTransform(matrix);
+    svgPoint2 = svgPoint2.matrixTransform(matrix);
+
+    path_paint_width = path_width / Math.sqrt((svgPoint2.x - svgPoint1.x) * (svgPoint2.x - svgPoint1.x) + (svgPoint2.y - svgPoint1.y) * (svgPoint2.y - svgPoint1.y));
+}
+
+/** The view effect.
+ *
+ *  @param dir direction the effect should be played (1 = forwards, -1 = backwards)
+ *  @param element the element the effect should be applied to
+ *  @param time the time that has elapsed since the beginning of the effect
+ *  @param options a dictionary with additional options (e.g. length of the effect); for the view effect the options need to contain the old and the new matrix.
+ */
+function view(dir, element, time, options)
+{
+    var length = 250;
+    var fraction;
+
+    if (!options[&quot;matrixInitial&quot;])
+    {
+        var tempString = slides[activeSlide][&quot;viewGroup&quot;].getAttribute(&quot;transform&quot;);
+
+        if (tempString)
+            options[&quot;matrixInitial&quot;] = (new matrixSVG()).fromAttribute(tempString);
+        else
+            options[&quot;matrixInitial&quot;] = (new matrixSVG()).fromSVGElements(1, 0, 0, 1, 0, 0);
+    }
+
+    if ((time == STATE_END) || (time == STATE_START))
+        fraction = 1;
+    else
+    {
+        if (options &amp;&amp; options[&quot;length&quot;])
+            length = options[&quot;length&quot;];
+
+        fraction = time / length;
+    }
+
+    if (dir == 1)
+    {
+        if (fraction &lt;= 0)
+        {
+            element.setAttribute(&quot;transform&quot;, options[&quot;matrixInitial&quot;].toAttribute());
+        }
+        else if (fraction &gt;= 1)
+        {
+            element.setAttribute(&quot;transform&quot;, options[&quot;matrixNew&quot;].toAttribute());
+
+            set_path_paint_width();
+
+            options[&quot;matrixInitial&quot;] = null;
+            return true;
+        }
+        else
+        {
+            element.setAttribute(&quot;transform&quot;, options[&quot;matrixInitial&quot;].mix(options[&quot;matrixNew&quot;], fraction).toAttribute());
+        }
+    }
+    else if (dir == -1)
+    {
+        if (fraction &lt;= 0)
+        {
+            element.setAttribute(&quot;transform&quot;, options[&quot;matrixInitial&quot;].toAttribute());
+        }
+        else if (fraction &gt;= 1)
+        {
+            element.setAttribute(&quot;transform&quot;, options[&quot;matrixOld&quot;].toAttribute());
+            set_path_paint_width();
+
+            options[&quot;matrixInitial&quot;] = null;
+            return true;
+        }
+        else
+        {
+            element.setAttribute(&quot;transform&quot;, options[&quot;matrixInitial&quot;].mix(options[&quot;matrixOld&quot;], fraction).toAttribute());
+        }
+    }
+
+    return false;
+}
+
+/** The fade effect.
+ *
+ *  @param dir direction the effect should be played (1 = forwards, -1 = backwards)
+ *  @param element the element the effect should be applied to
+ *  @param time the time that has elapsed since the beginning of the effect
+ *  @param options a dictionary with additional options (e.g. length of the effect)
+ */
+function fade(dir, element, time, options)
+{
+    var length = 250;
+    var fraction;
+
+    if ((time == STATE_END) || (time == STATE_START))
+        fraction = 1;
+    else
+    {
+        if (options &amp;&amp; options[&quot;length&quot;])
+            length = options[&quot;length&quot;];
+
+        fraction = time / length;
+    }
+
+    if (dir == 1)
+    {
+        if (fraction &lt;= 0)
+        {
+            element.style.display = &quot;none&quot;;
+            element.setAttribute(&quot;opacity&quot;, 0);
+        }
+        else if (fraction &gt;= 1)
+        {
+            element.style.display = &quot;inherit&quot;;
+            element.setAttribute(&quot;opacity&quot;, 1);
+            return true;
+        }
+        else
+        {
+            element.style.display = &quot;inherit&quot;;
+            element.setAttribute(&quot;opacity&quot;, fraction);
+        }
+    }
+    else if (dir == -1)
+    {
+        if (fraction &lt;= 0)
+        {
+            element.style.display = &quot;inherit&quot;;
+            element.setAttribute(&quot;opacity&quot;, 1);
+        }
+        else if (fraction &gt;= 1)
+        {
+            element.setAttribute(&quot;opacity&quot;, 0);
+            element.style.display = &quot;none&quot;;
+            return true;
+        }
+        else
+        {
+            element.style.display = &quot;inherit&quot;;
+            element.setAttribute(&quot;opacity&quot;, 1 - fraction);
+        }
+    }
+    return false;
+}
+
+/** The appear effect.
+ *
+ *  @param dir direction the effect should be played (1 = forwards, -1 = backwards)
+ *  @param element the element the effect should be applied to
+ *  @param time the time that has elapsed since the beginning of the effect
+ *  @param options a dictionary with additional options (e.g. length of the effect)
+ */
+function appear(dir, element, time, options)
+{
+    if (dir == 1)
+    {
+        element.style.display = &quot;inherit&quot;;
+        element.setAttribute(&quot;opacity&quot;,1);
+    }
+    else if (dir == -1)
+    {
+        element.style.display = &quot;none&quot;;
+        element.setAttribute(&quot;opacity&quot;,0);
+    }
+    return true;
+}
+
+/** The pop effect.
+ *
+ *  @param dir direction the effect should be played (1 = forwards, -1 = backwards)
+ *  @param element the element the effect should be applied to
+ *  @param time the time that has elapsed since the beginning of the effect
+ *  @param options a dictionary with additional options (e.g. length of the effect)
+ */
+function pop(dir, element, time, options)
+{
+    var length = 500;
+    var fraction;
+
+    if ((time == STATE_END) || (time == STATE_START))
+        fraction = 1;
+    else
+    {
+        if (options &amp;&amp; options[&quot;length&quot;])
+            length = options[&quot;length&quot;];
+
+        fraction = time / length;
+    }
+
+    if (dir == 1)
+    {
+        if (fraction &lt;= 0)
+        {
+            element.setAttribute(&quot;opacity&quot;, 0);
+            element.setAttribute(&quot;transform&quot;, &quot;scale(0)&quot;);
+            element.style.display = &quot;none&quot;;
+        }
+        else if (fraction &gt;= 1)
+        {
+            element.setAttribute(&quot;opacity&quot;, 1);
+            element.removeAttribute(&quot;transform&quot;);
+            element.style.display = &quot;inherit&quot;;
+            return true;
+        }
+        else
+        {
+            element.style.display = &quot;inherit&quot;;
+            var opacityFraction = fraction * 3;
+            if (opacityFraction &gt; 1)
+                opacityFraction = 1;
+            element.setAttribute(&quot;opacity&quot;, opacityFraction);
+            var offsetX = WIDTH * (1.0 - fraction) / 2.0;
+            var offsetY = HEIGHT * (1.0 - fraction) / 2.0;
+            element.setAttribute(&quot;transform&quot;, &quot;translate(&quot; + offsetX + &quot;,&quot; + offsetY + &quot;) scale(&quot; + fraction + &quot;)&quot;);
+        }
+    }
+    else if (dir == -1)
+    {
+        if (fraction &lt;= 0)
+        {
+            element.setAttribute(&quot;opacity&quot;, 1);
+            element.setAttribute(&quot;transform&quot;, &quot;scale(1)&quot;);
+            element.style.display = &quot;inherit&quot;;
+        }
+        else if (fraction &gt;= 1)
+        {
+            element.setAttribute(&quot;opacity&quot;, 0);
+            element.removeAttribute(&quot;transform&quot;);
+            element.style.display = &quot;none&quot;;
+            return true;
+        }
+        else
+        {
+            element.setAttribute(&quot;opacity&quot;, 1 - fraction);
+            element.setAttribute(&quot;transform&quot;, &quot;scale(&quot; + 1 - fraction + &quot;)&quot;);
+            element.style.display = &quot;inherit&quot;;
+        }
+    }
+    return false;
+}
+
+/** Function to set a slide either to the start or the end state.
+ *
+ *  @param slide the slide to use
+ *  @param state the state into which the slide should be set
+ */
+function setSlideToState(slide, state)
+{
+    slides[slide][&quot;viewGroup&quot;].setAttribute(&quot;transform&quot;, slides[slide].initialView);
+
+    if (slides[slide][&quot;effects&quot;])
+    {
+        if (state == STATE_END)
+        {
+            for (var counter = 0; counter &lt; slides[slide][&quot;effects&quot;].length; counter++)
+            {
+                for (var subCounter = 0; subCounter &lt; slides[slide][&quot;effects&quot;][counter].length; subCounter++)
+                {
+                    var effect = slides[slide][&quot;effects&quot;][counter][subCounter];
+                    if (effect[&quot;effect&quot;] == &quot;fade&quot;)
+                        fade(effect[&quot;dir&quot;], effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;appear&quot;)
+                        appear(effect[&quot;dir&quot;], effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;pop&quot;)
+                        pop(effect[&quot;dir&quot;], effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;view&quot;)
+                        view(effect[&quot;dir&quot;], effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                }
+            }
+        }
+        else if (state == STATE_START)
+        {
+            for (var counter = slides[slide][&quot;effects&quot;].length - 1; counter &gt;= 0; counter--)
+            {
+                for (var subCounter = 0; subCounter &lt; slides[slide][&quot;effects&quot;][counter].length; subCounter++)
+                {
+                    var effect = slides[slide][&quot;effects&quot;][counter][subCounter];
+                    if (effect[&quot;effect&quot;] == &quot;fade&quot;)
+                        fade(parseInt(effect[&quot;dir&quot;]) * -1, effect[&quot;element&quot;], STATE_START, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;appear&quot;)
+                        appear(parseInt(effect[&quot;dir&quot;]) * -1, effect[&quot;element&quot;], STATE_START, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;pop&quot;)
+                        pop(parseInt(effect[&quot;dir&quot;]) * -1, effect[&quot;element&quot;], STATE_START, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;view&quot;)
+                        view(parseInt(effect[&quot;dir&quot;]) * -1, effect[&quot;element&quot;], STATE_START, effect[&quot;options&quot;]);
+                }
+            }
+        }
+        else
+        {
+            setSlideToState(slide, STATE_START);
+
+            for (var counter = 0; counter &lt; slides[slide][&quot;effects&quot;].length &amp;&amp; counter &lt; state; counter++)
+            {
+                for (var subCounter = 0; subCounter &lt; slides[slide][&quot;effects&quot;][counter].length; subCounter++)
+                {
+                    var effect = slides[slide][&quot;effects&quot;][counter][subCounter];
+                    if (effect[&quot;effect&quot;] == &quot;fade&quot;)
+                        fade(effect[&quot;dir&quot;], effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;appear&quot;)
+                        appear(effect[&quot;dir&quot;], effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;pop&quot;)
+                        pop(effect[&quot;dir&quot;], effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                    else if (effect[&quot;effect&quot;] == &quot;view&quot;)
+                        view(effect[&quot;dir&quot;], effect[&quot;element&quot;], STATE_END, effect[&quot;options&quot;]);
+                }
+            }
+        }
+    }
+
+    window.location.hash = (activeSlide + 1) + '_' + activeEffect;
+}
+
+/** Convenience function to translate a attribute string into a dictionary.
+ *
+ *    @param str the attribute string
+ *  @return a dictionary
+ *  @see dictToPropStr
+ */
+function propStrToDict(str)
+{
+    var list = str.split(&quot;;&quot;);
+    var obj = new Object();
+
+    for (var counter = 0; counter &lt; list.length; counter++)
+    {
+        var subStr = list[counter];
+        var subList = subStr.split(&quot;:&quot;);
+        if (subList.length == 2)
+        {
+            obj[subList[0]] = subList[1];
+        }
+    }
+
+    return obj;
+}
+
+/** Convenience function to translate a dictionary into a string that can be used as an attribute.
+ *
+ *  @param dict the dictionary to convert
+ *  @return a string that can be used as an attribute
+ *  @see propStrToDict
+ */
+function dictToPropStr(dict)
+{
+    var str = &quot;&quot;;
+
+    for (var key in dict)
+    {
+        str += key + &quot;:&quot; + dict[key] + &quot;;&quot;;
+    }
+
+    return str;
+}
+
+/** Sub-function to add a suffix to the ids of the node and all its children.
+ *
+ *    @param node the node to change
+ *    @param suffix the suffix to add
+ *    @param replace dictionary of replaced ids
+ *  @see suffixNodeIds
+ */
+function suffixNoneIds_sub(node, suffix, replace)
+{
+    if (node.nodeType == 1)
+    {
+        if (node.getAttribute(&quot;id&quot;))
+        {
+            var id = node.getAttribute(&quot;id&quot;)
+                replace[&quot;#&quot; + id] = id + suffix;
+            node.setAttribute(&quot;id&quot;, id + suffix);
+        }
+
+        if ((node.nodeName == &quot;use&quot;) &amp;&amp; (node.getAttributeNS(NSS[&quot;xlink&quot;], &quot;href&quot;)) &amp;&amp; (replace[node.getAttribute(NSS[&quot;xlink&quot;], &quot;href&quot;)]))
+            node.setAttribute(NSS[&quot;xlink&quot;], &quot;href&quot;, node.getAttribute(NSS[&quot;xlink&quot;], &quot;href&quot;) + suffix);
+
+        if (node.childNodes)
+        {
+            for (var counter = 0; counter &lt; node.childNodes.length; counter++)
+                suffixNoneIds_sub(node.childNodes[counter], suffix, replace);
+        }
+    }
+}
+
+/** Function to add a suffix to the ids of the node and all its children.
+ *
+ *    @param node the node to change
+ *    @param suffix the suffix to add
+ *  @return the changed node
+ *  @see suffixNodeIds_sub
+ */
+function suffixNodeIds(node, suffix)
+{
+    var replace = new Object();
+
+    suffixNoneIds_sub(node, suffix, replace);
+
+    return node;
+}
+
+/** Function to build a progress bar.
+ *
+ *  @param parent node to attach the progress bar to
+ */
+function createProgressBar(parent_node)
+{
+    var g = document.createElementNS(NSS[&quot;svg&quot;], &quot;g&quot;);
+    g.setAttribute(&quot;clip-path&quot;, &quot;url(#jessyInkSlideClipPath)&quot;);
+    g.setAttribute(&quot;id&quot;, &quot;layer_progress_bar&quot;);
+    g.setAttribute(&quot;style&quot;, &quot;display: none;&quot;);
+
+    var rect_progress_bar = document.createElementNS(NSS[&quot;svg&quot;], &quot;rect&quot;);
+    rect_progress_bar.setAttribute(&quot;style&quot;, &quot;marker: none; fill: rgb(128, 128, 128); stroke: none;&quot;);
+    rect_progress_bar.setAttribute(&quot;id&quot;, &quot;rect_progress_bar&quot;);
+    rect_progress_bar.setAttribute(&quot;x&quot;, 0);
+    rect_progress_bar.setAttribute(&quot;y&quot;, 0.99 * HEIGHT);
+    rect_progress_bar.setAttribute(&quot;width&quot;, 0);
+    rect_progress_bar.setAttribute(&quot;height&quot;, 0.01 * HEIGHT);
+    g.appendChild(rect_progress_bar);
+
+    var circle_timer_indicator = document.createElementNS(NSS[&quot;svg&quot;], &quot;circle&quot;);
+    circle_timer_indicator.setAttribute(&quot;style&quot;, &quot;marker: none; fill: rgb(255, 0, 0); stroke: none;&quot;);
+    circle_timer_indicator.setAttribute(&quot;id&quot;, &quot;circle_timer_indicator&quot;);
+    circle_timer_indicator.setAttribute(&quot;cx&quot;, 0.005 * HEIGHT);
+    circle_timer_indicator.setAttribute(&quot;cy&quot;, 0.995 * HEIGHT);
+    circle_timer_indicator.setAttribute(&quot;r&quot;, 0.005 * HEIGHT);
+    g.appendChild(circle_timer_indicator);
+
+    parent_node.appendChild(g);
+}
+
+/** Function to hide the progress bar.
+ *
+ */
+function hideProgressBar()
+{
+    var progress_bar = document.getElementById(&quot;layer_progress_bar&quot;);
+
+    if (!progress_bar)
+    {
+        return;
+    }
+
+    progress_bar.setAttribute(&quot;style&quot;, &quot;display: none;&quot;);
+}
+
+/** Function to show the progress bar.
+ *
+ */
+function showProgressBar()
+{
+    var progress_bar = document.getElementById(&quot;layer_progress_bar&quot;);
+
+    if (!progress_bar)
+    {
+        return;
+    }
+
+    progress_bar.setAttribute(&quot;style&quot;, &quot;display: inherit;&quot;);
+}
+
+/** Set progress bar value.
+ *
+ *    @param value the current slide number
+ *
+ */
+function setProgressBarValue(value)
+{
+    var rect_progress_bar = document.getElementById(&quot;rect_progress_bar&quot;);
+
+    if (!rect_progress_bar)
+    {
+        return;
+    }
+
+    if (value &lt; 1)
+    {
+        // First slide, assumed to be the title of the presentation
+        var x = 0;
+        var w = 0.01 * HEIGHT;
+    }
+    else if (value &gt;= slides.length - 1)
+    {
+        // Last slide, assumed to be the end of the presentation
+        var x = WIDTH - 0.01 * HEIGHT;
+        var w = 0.01 * HEIGHT;
+    }
+    else
+    {
+        value -= 1;
+        value /= (slides.length - 2);
+
+        var x = WIDTH * value;
+        var w = WIDTH / (slides.length - 2);
+    }
+
+    rect_progress_bar.setAttribute(&quot;x&quot;, x);
+    rect_progress_bar.setAttribute(&quot;width&quot;, w);
+}
+
+/** Set time indicator.
+ *
+ *    @param value the percentage of time elapse so far between 0.0 and 1.0
+ *
+ */
+function setTimeIndicatorValue(value)
+{
+    var circle_timer_indicator = document.getElementById(&quot;circle_timer_indicator&quot;);
+
+    if (!circle_timer_indicator)
+    {
+        return;
+    }
+
+    if (value &lt; 0.0)
+    {
+        value = 0.0;
+    }
+
+    if (value &gt; 1.0)
+    {
+        value = 1.0;
+    }
+
+    var cx = (WIDTH - 0.01 * HEIGHT) * value + 0.005 * HEIGHT;
+    circle_timer_indicator.setAttribute(&quot;cx&quot;, cx);
+}
+
+/** Update timer.
+ *
+ */
+function updateTimer()
+{
+    timer_elapsed += 1;
+    setTimeIndicatorValue((timer_elapsed - timer_start) / (60 * timer_duration));
+}
+
+/** Convert screen coordinates to document coordinates.
+ *
+ *  @param e event with screen coordinates
+ *
+ *  @return coordinates in SVG file coordinate system
+ */
+function calcCoord(e)
+{
+    var svgPoint = document.documentElement.createSVGPoint();
+    svgPoint.x = e.clientX + window.pageXOffset;
+    svgPoint.y = e.clientY + window.pageYOffset;
+
+    var matrix = slides[activeSlide][&quot;element&quot;].getScreenCTM();
+
+    if (slides[activeSlide][&quot;viewGroup&quot;])
+        matrix = slides[activeSlide][&quot;viewGroup&quot;].getScreenCTM();
+
+    svgPoint = svgPoint.matrixTransform(matrix.inverse());
+    return svgPoint;
+}
+
+/** Add slide.
+ *
+ *    @param after_slide after which slide the new slide should be inserted into the presentation
+ */
+function addSlide(after_slide)
+{
+    number_of_added_slides++;
+
+    var g = document.createElementNS(NSS[&quot;svg&quot;], &quot;g&quot;);
+    g.setAttribute(&quot;clip-path&quot;, &quot;url(#jessyInkSlideClipPath)&quot;);
+    g.setAttribute(&quot;id&quot;, &quot;Whiteboard &quot; + Date() + &quot; presentation copy&quot;);
+    g.setAttribute(&quot;style&quot;, &quot;display: none;&quot;);
+
+    var new_slide = new Object();
+    new_slide[&quot;element&quot;] = g;
+
+    // Set build in transition.
+    new_slide[&quot;transitionIn&quot;] = new Object();
+    var dict = defaultTransitionInDict;
+    new_slide[&quot;transitionIn&quot;][&quot;name&quot;] = dict[&quot;name&quot;];
+    new_slide[&quot;transitionIn&quot;][&quot;options&quot;] = new Object();
+
+    for (key in dict)
+        if (key != &quot;name&quot;)
+            new_slide[&quot;transitionIn&quot;][&quot;options&quot;][key] = dict[key];
+
+    // Set build out transition.
+    new_slide[&quot;transitionOut&quot;] = new Object();
+    dict = defaultTransitionOutDict;
+    new_slide[&quot;transitionOut&quot;][&quot;name&quot;] = dict[&quot;name&quot;];
+    new_slide[&quot;transitionOut&quot;][&quot;options&quot;] = new Object();
+
+    for (key in dict)
+        if (key != &quot;name&quot;)
+            new_slide[&quot;transitionOut&quot;][&quot;options&quot;][key] = dict[key];
+
+    // Copy master slide content.
+    if (masterSlide)
+    {
+        var clonedNode = suffixNodeIds(masterSlide.cloneNode(true), &quot;_&quot; + Date() + &quot; presentation_copy&quot;);
+        clonedNode.removeAttributeNS(NSS[&quot;inkscape&quot;], &quot;groupmode&quot;);
+        clonedNode.removeAttributeNS(NSS[&quot;inkscape&quot;], &quot;label&quot;);
+        clonedNode.style.display = &quot;inherit&quot;;
+
+        g.appendChild(clonedNode);
+    }
+
+    // Substitute auto texts.
+    substituteAutoTexts(g, &quot;Whiteboard &quot; + number_of_added_slides, &quot;W&quot; + number_of_added_slides, slides.length);
+
+    g.setAttribute(&quot;onmouseover&quot;, &quot;if ((currentMode == INDEX_MODE) &amp;&amp; ( activeSlide != &quot; + (after_slide + 1) + &quot;)) { indexSetActiveSlide(&quot; + (after_slide + 1) + &quot;); };&quot;);
+
+    // Create a transform group.
+    var transformGroup = document.createElementNS(NSS[&quot;svg&quot;], &quot;g&quot;);
+
+    // Add content to transform group.
+    while (g.firstChild)
+        transformGroup.appendChild(g.firstChild);
+
+    // Transfer the transform attribute from the node to the transform group.
+    if (g.getAttribute(&quot;transform&quot;))
+    {
+        transformGroup.setAttribute(&quot;transform&quot;, g.getAttribute(&quot;transform&quot;));
+        g.removeAttribute(&quot;transform&quot;);
+    }
+
+    // Create a view group.
+    var viewGroup = document.createElementNS(NSS[&quot;svg&quot;], &quot;g&quot;);
+
+    viewGroup.appendChild(transformGroup);
+    new_slide[&quot;viewGroup&quot;] = g.appendChild(viewGroup);
+
+    // Insert background.
+    if (BACKGROUND_COLOR != null)
+    {
+        var rectNode = document.createElementNS(NSS[&quot;svg&quot;], &quot;rect&quot;);
+
+        rectNode.setAttribute(&quot;x&quot;, 0);
+        rectNode.setAttribute(&quot;y&quot;, 0);
+        rectNode.setAttribute(&quot;width&quot;, WIDTH);
+        rectNode.setAttribute(&quot;height&quot;, HEIGHT);
+        rectNode.setAttribute(&quot;id&quot;, &quot;jessyInkBackground&quot; + Date());
+        rectNode.setAttribute(&quot;fill&quot;, BACKGROUND_COLOR);
+
+        new_slide[&quot;viewGroup&quot;].insertBefore(rectNode, new_slide[&quot;viewGroup&quot;].firstChild);
+    }
+
+    // Set initial view even if there are no other views.
+    var matrixOld = (new matrixSVG()).fromElements(1, 0, 0, 0, 1, 0, 0, 0, 1);
+
+    new_slide[&quot;viewGroup&quot;].setAttribute(&quot;transform&quot;, matrixOld.toAttribute());
+    new_slide.initialView = matrixOld.toAttribute();
+
+    // Insert slide
+    var node = slides[after_slide][&quot;element&quot;];
+    var next_node = node.nextSibling;
+    var parent_node = node.parentNode;
+
+    if (next_node)
+    {
+        parent_node.insertBefore(g, next_node);
+    }
+    else
+    {
+        parent_node.appendChild(g);
+    }
+
+    g = document.createElementNS(NSS[&quot;svg&quot;], &quot;g&quot;);
+    g.setAttributeNS(NSS[&quot;inkscape&quot;], &quot;groupmode&quot;, &quot;layer&quot;);
+    g.setAttributeNS(NSS[&quot;inkscape&quot;], &quot;label&quot;, &quot;Whiteboard &quot; + number_of_added_slides);
+    g.setAttribute(&quot;clip-path&quot;, &quot;url(#jessyInkSlideClipPath)&quot;);
+    g.setAttribute(&quot;id&quot;, &quot;Whiteboard &quot; + Date());
+    g.setAttribute(&quot;style&quot;, &quot;display: none;&quot;);
+
+    new_slide[&quot;original_element&quot;] = g;
+
+    node = slides[after_slide][&quot;original_element&quot;];
+    next_node = node.nextSibling;
+    parent_node = node.parentNode;
+
+    if (next_node)
+    {
+        parent_node.insertBefore(g, next_node);
+    }
+    else
+    {
+        parent_node.appendChild(g);
+    }
+
+    before_new_slide = slides.slice(0, after_slide + 1);
+    after_new_slide = slides.slice(after_slide + 1);
+    slides = before_new_slide.concat(new_slide, after_new_slide);
+
+    //resetting the counter attributes on the slides that follow the new slide...
+    for (var counter = after_slide+2; counter &lt; slides.length; counter++)
+    {
+        slides[counter][&quot;element&quot;].setAttribute(&quot;onmouseover&quot;, &quot;if ((currentMode == INDEX_MODE) &amp;&amp; ( activeSlide != &quot; + counter + &quot;)) { indexSetActiveSlide(&quot; + counter + &quot;); };&quot;);
+    }
+}
+
+/** Convenience function to obtain a transformation matrix from a point matrix.
+ *
+ *    @param mPoints Point matrix.
+ *    @return A transformation matrix.
+ */
+function pointMatrixToTransformation(mPoints)
+{
+    mPointsOld = (new matrixSVG()).fromElements(0, WIDTH, WIDTH, 0, 0, HEIGHT, 1, 1, 1);
+
+    return mPointsOld.mult(mPoints.inv());
+}
+
+/** Convenience function to obtain a matrix with three corners of a rectangle.
+ *
+ *    @param rect an svg rectangle
+ *    @return a matrixSVG containing three corners of the rectangle
+ */
+function rectToMatrix(rect)
+{
+    rectWidth = rect.getBBox().width;
+    rectHeight = rect.getBBox().height;
+    rectX = rect.getBBox().x;
+    rectY = rect.getBBox().y;
+    rectXcorr = 0;
+    rectYcorr = 0;
+
+    scaleX = WIDTH / rectWidth;
+    scaleY = HEIGHT / rectHeight;
+
+    if (scaleX &gt; scaleY)
+    {
+        scaleX = scaleY;
+        rectXcorr -= (WIDTH / scaleX - rectWidth) / 2;
+        rectWidth = WIDTH / scaleX;
+    }
+    else
+    {
+        scaleY = scaleX;
+        rectYcorr -= (HEIGHT / scaleY - rectHeight) / 2;
+        rectHeight = HEIGHT / scaleY;
+    }
+
+    if (rect.transform.baseVal.numberOfItems &lt; 1)
+    {
+        mRectTrans = (new matrixSVG()).fromElements(1, 0, 0, 0, 1, 0, 0, 0, 1);
+    }
+    else
+    {
+        mRectTrans = (new matrixSVG()).fromSVGMatrix(rect.transform.baseVal.consolidate().matrix);
+    }
+
+    newBasePoints = (new matrixSVG()).fromElements(rectX, rectX, rectX, rectY, rectY, rectY, 1, 1, 1);
+    newVectors = (new matrixSVG()).fromElements(rectXcorr, rectXcorr + rectWidth, rectXcorr + rectWidth, rectYcorr, rectYcorr, rectYcorr + rectHeight, 0, 0, 0);
+
+    return mRectTrans.mult(newBasePoints.add(newVectors));
+}
+
+/** Function to handle JessyInk elements.
+ *
+ *    @param    node    Element node.
+ */
+function handleElement(node)
+{
+    if (node.getAttributeNS(NSS['jessyink'], 'element') == 'core.video')
+    {
+        var url;
+        var width;
+        var height;
+        var x;
+        var y;
+        var transform;
+
+        var tspans = node.getElementsByTagNameNS(&quot;http://www.w3.org/2000/svg&quot;, &quot;tspan&quot;);
+
+        for (var tspanCounter = 0; tspanCounter &lt; tspans.length; tspanCounter++)
+        {
+            if (tspans[tspanCounter].getAttributeNS(&quot;https://launchpad.net/jessyink&quot;, &quot;video&quot;) == &quot;url&quot;)
+            {
+                url = tspans[tspanCounter].firstChild.nodeValue;
+            }
+        }
+
+        var rects = node.getElementsByTagNameNS(&quot;http://www.w3.org/2000/svg&quot;, &quot;rect&quot;);
+
+        for (var rectCounter = 0; rectCounter &lt; rects.length; rectCounter++)
+        {
+            if (rects[rectCounter].getAttributeNS(&quot;https://launchpad.net/jessyink&quot;, &quot;video&quot;) == &quot;rect&quot;)
+            {
+                x = rects[rectCounter].getAttribute(&quot;x&quot;);
+                y = rects[rectCounter].getAttribute(&quot;y&quot;);
+                width = rects[rectCounter].getAttribute(&quot;width&quot;);
+                height = rects[rectCounter].getAttribute(&quot;height&quot;);
+                transform = rects[rectCounter].getAttribute(&quot;transform&quot;);
+            }
+        }
+
+        for (var childCounter = 0; childCounter &lt; node.childNodes.length; childCounter++)
+        {
+            if (node.childNodes[childCounter].nodeType == 1)
+            {
+                if (node.childNodes[childCounter].style)
+                {
+                    node.childNodes[childCounter].style.display = 'none';
+                }
+                else
+                {
+                    node.childNodes[childCounter].setAttribute(&quot;style&quot;, &quot;display: none;&quot;);
+                }
+            }
+        }
+
+        var foreignNode = document.createElementNS(&quot;http://www.w3.org/2000/svg&quot;, &quot;foreignObject&quot;);
+        foreignNode.setAttribute(&quot;x&quot;, x);
+        foreignNode.setAttribute(&quot;y&quot;, y);
+        foreignNode.setAttribute(&quot;width&quot;, width);
+        foreignNode.setAttribute(&quot;height&quot;, height);
+        foreignNode.setAttribute(&quot;transform&quot;, transform);
+
+        var videoNode = document.createElementNS(&quot;http://www.w3.org/1999/xhtml&quot;, &quot;video&quot;);
+        videoNode.setAttribute(&quot;src&quot;, url);
+
+        foreignNode.appendChild(videoNode);
+        node.appendChild(foreignNode);
+    }
+}
+
+/** Class processing the location hash.
+ *
+ *    @param str location hash
+ */
+function LocationHash(str)
+{
+    this.slideNumber = 0;
+    this.effectNumber = 0;
+
+    str = str.substr(1, str.length - 1);
+
+    var parts = str.split('_');
+
+    // Try to extract slide number.
+    if (parts.length &gt;= 1)
+    {
+        try
+        {
+            var slideNumber = parseInt(parts[0]);
+
+            if (!isNaN(slideNumber))
+            {
+                this.slideNumber = slideNumber - 1;
+            }
+        }
+        catch (e)
+        {
+        }
+    }
+
+    // Try to extract effect number.
+    if (parts.length &gt;= 2)
+    {
+        try
+        {
+            var effectNumber = parseInt(parts[1]);
+
+            if (!isNaN(effectNumber))
+            {
+                this.effectNumber = effectNumber;
+            }
+        }
+        catch (e)
+        {
+        }
+    }
+}
+
+/** Class representing an svg matrix.
+*/
+function matrixSVG()
+{
+    this.e11 = 0; // a
+    this.e12 = 0; // c
+    this.e13 = 0; // e
+    this.e21 = 0; // b
+    this.e22 = 0; // d
+    this.e23 = 0; // f
+    this.e31 = 0;
+    this.e32 = 0;
+    this.e33 = 0;
+}
+
+/** Constructor function.
+ *
+ *    @param a element a (i.e. 1, 1) as described in the svg standard.
+ *    @param b element b (i.e. 2, 1) as described in the svg standard.
+ *    @param c element c (i.e. 1, 2) as described in the svg standard.
+ *    @param d element d (i.e. 2, 2) as described in the svg standard.
+ *    @param e element e (i.e. 1, 3) as described in the svg standard.
+ *    @param f element f (i.e. 2, 3) as described in the svg standard.
+ */
+matrixSVG.prototype.fromSVGElements = function(a, b, c, d, e, f)
+{
+    this.e11 = a;
+    this.e12 = c;
+    this.e13 = e;
+    this.e21 = b;
+    this.e22 = d;
+    this.e23 = f;
+    this.e31 = 0;
+    this.e32 = 0;
+    this.e33 = 1;
+
+    return this;
+}
+
+/** Constructor function.
+ *
+ *    @param matrix an svg matrix as described in the svg standard.
+ */
+matrixSVG.prototype.fromSVGMatrix = function(m)
+{
+    this.e11 = m.a;
+    this.e12 = m.c;
+    this.e13 = m.e;
+    this.e21 = m.b;
+    this.e22 = m.d;
+    this.e23 = m.f;
+    this.e31 = 0;
+    this.e32 = 0;
+    this.e33 = 1;
+
+    return this;
+}
+
+/** Constructor function.
+ *
+ *    @param e11 element 1, 1 of the matrix.
+ *    @param e12 element 1, 2 of the matrix.
+ *    @param e13 element 1, 3 of the matrix.
+ *    @param e21 element 2, 1 of the matrix.
+ *    @param e22 element 2, 2 of the matrix.
+ *    @param e23 element 2, 3 of the matrix.
+ *    @param e31 element 3, 1 of the matrix.
+ *    @param e32 element 3, 2 of the matrix.
+ *    @param e33 element 3, 3 of the matrix.
+ */
+matrixSVG.prototype.fromElements = function(e11, e12, e13, e21, e22, e23, e31, e32, e33)
+{
+    this.e11 = e11;
+    this.e12 = e12;
+    this.e13 = e13;
+    this.e21 = e21;
+    this.e22 = e22;
+    this.e23 = e23;
+    this.e31 = e31;
+    this.e32 = e32;
+    this.e33 = e33;
+
+    return this;
+}
+
+/** Constructor function.
+ *
+ *    @param attrString string value of the &quot;transform&quot; attribute (currently only &quot;matrix&quot; is accepted)
+ */
+matrixSVG.prototype.fromAttribute = function(attrString)
+{
+    str = attrString.substr(7, attrString.length - 8);
+
+    str = str.trim();
+
+    strArray = str.split(&quot;,&quot;);
+
+    // Opera does not use commas to separate the values of the matrix, only spaces.
+    if (strArray.length != 6)
+        strArray = str.split(&quot; &quot;);
+
+    this.e11 = parseFloat(strArray[0]);
+    this.e21 = parseFloat(strArray[1]);
+    this.e31 = 0;
+    this.e12 = parseFloat(strArray[2]);
+    this.e22 = parseFloat(strArray[3]);
+    this.e32 = 0;
+    this.e13 = parseFloat(strArray[4]);
+    this.e23 = parseFloat(strArray[5]);
+    this.e33 = 1;
+
+    return this;
+}
+
+/** Output function
+ *
+ *    @return a string that can be used as the &quot;transform&quot; attribute.
+ */
+matrixSVG.prototype.toAttribute = function()
+{
+    return &quot;matrix(&quot; + this.e11 + &quot;, &quot; + this.e21 + &quot;, &quot; + this.e12 + &quot;, &quot; + this.e22 + &quot;, &quot; + this.e13 + &quot;, &quot; + this.e23 + &quot;)&quot;;
+}
+
+/** Matrix nversion.
+ *
+ *    @return the inverse of the matrix
+ */
+matrixSVG.prototype.inv = function()
+{
+    out = new matrixSVG();
+
+    det = this.e11 * (this.e33 * this.e22 - this.e32 * this.e23) - this.e21 * (this.e33 * this.e12 - this.e32 * this.e13) + this.e31 * (this.e23 * this.e12 - this.e22 * this.e13);
+
+    out.e11 =  (this.e33 * this.e22 - this.e32 * this.e23) / det;
+    out.e12 = -(this.e33 * this.e12 - this.e32 * this.e13) / det;
+    out.e13 =  (this.e23 * this.e12 - this.e22 * this.e13) / det;
+    out.e21 = -(this.e33 * this.e21 - this.e31 * this.e23) / det;
+    out.e22 =  (this.e33 * this.e11 - this.e31 * this.e13) / det;
+    out.e23 = -(this.e23 * this.e11 - this.e21 * this.e13) / det;
+    out.e31 =  (this.e32 * this.e21 - this.e31 * this.e22) / det;
+    out.e32 = -(this.e32 * this.e11 - this.e31 * this.e12) / det;
+    out.e33 =  (this.e22 * this.e11 - this.e21 * this.e12) / det;
+
+    return out;
+}
+
+/** Matrix multiplication.
+ *
+ *    @param op another svg matrix
+ *    @return this * op
+ */
+matrixSVG.prototype.mult = function(op)
+{
+    out = new matrixSVG();
+
+    out.e11 = this.e11 * op.e11 + this.e12 * op.e21 + this.e13 * op.e31;
+    out.e12 = this.e11 * op.e12 + this.e12 * op.e22 + this.e13 * op.e32;
+    out.e13 = this.e11 * op.e13 + this.e12 * op.e23 + this.e13 * op.e33;
+    out.e21 = this.e21 * op.e11 + this.e22 * op.e21 + this.e23 * op.e31;
+    out.e22 = this.e21 * op.e12 + this.e22 * op.e22 + this.e23 * op.e32;
+    out.e23 = this.e21 * op.e13 + this.e22 * op.e23 + this.e23 * op.e33;
+    out.e31 = this.e31 * op.e11 + this.e32 * op.e21 + this.e33 * op.e31;
+    out.e32 = this.e31 * op.e12 + this.e32 * op.e22 + this.e33 * op.e32;
+    out.e33 = this.e31 * op.e13 + this.e32 * op.e23 + this.e33 * op.e33;
+
+    return out;
+}
+
+/** Matrix addition.
+ *
+ *    @param op another svg matrix
+ *    @return this + op
+ */
+matrixSVG.prototype.add = function(op)
+{
+    out = new matrixSVG();
+
+    out.e11 = this.e11 + op.e11;
+    out.e12 = this.e12 + op.e12;
+    out.e13 = this.e13 + op.e13;
+    out.e21 = this.e21 + op.e21;
+    out.e22 = this.e22 + op.e22;
+    out.e23 = this.e23 + op.e23;
+    out.e31 = this.e31 + op.e31;
+    out.e32 = this.e32 + op.e32;
+    out.e33 = this.e33 + op.e33;
+
+    return out;
+}
+
+/** Matrix mixing.
+ *
+ *    @param op another svg matrix
+ *    @parma contribOp contribution of the other matrix (0 &lt;= contribOp &lt;= 1)
+ *    @return (1 - contribOp) * this + contribOp * op
+ */
+matrixSVG.prototype.mix = function(op, contribOp)
+{
+    contribThis = 1.0 - contribOp;
+    out = new matrixSVG();
+
+    out.e11 = contribThis * this.e11 + contribOp * op.e11;
+    out.e12 = contribThis * this.e12 + contribOp * op.e12;
+    out.e13 = contribThis * this.e13 + contribOp * op.e13;
+    out.e21 = contribThis * this.e21 + contribOp * op.e21;
+    out.e22 = contribThis * this.e22 + contribOp * op.e22;
+    out.e23 = contribThis * this.e23 + contribOp * op.e23;
+    out.e31 = contribThis * this.e31 + contribOp * op.e31;
+    out.e32 = contribThis * this.e32 + contribOp * op.e32;
+    out.e33 = contribThis * this.e33 + contribOp * op.e33;
+
+    return out;
+}
+
+/** Trimming function for strings.
+*/
+String.prototype.trim = function()
+{
+    return this.replace(/^\s+|\s+$/g, '');
+}
+
+/** SVGElement.getTransformToElement polyfill */
+SVGElement.prototype.getTransformToElement = SVGElement.prototype.getTransformToElement || function(elem) {
+    return elem.getScreenCTM().inverse().multiply(this.getScreenCTM());
+};
+</script>
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