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+/*
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+ * Handles finding a text string anywhere in the slides and showing the next occurrence to the user
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+ * by navigatating to that slide and highlighting it.
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+ *
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+ * By Jon Snyder <snyder.jon@gmail.com>, February 2013
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+ */
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+
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+var RevealSearch = (function() {
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+
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+ var matchedSlides;
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+ var currentMatchedIndex;
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+ var searchboxDirty;
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+ var myHilitor;
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+
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+// Original JavaScript code by Chirp Internet: www.chirp.com.au
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+// Please acknowledge use of this code by including this header.
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+// 2/2013 jon: modified regex to display any match, not restricted to word boundaries.
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+
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+function Hilitor(id, tag)
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+{
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+
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+ var targetNode = document.getElementById(id) || document.body;
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+ var hiliteTag = tag || "EM";
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+ var skipTags = new RegExp("^(?:" + hiliteTag + "|SCRIPT|FORM)$");
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+ var colors = ["#ff6", "#a0ffff", "#9f9", "#f99", "#f6f"];
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+ var wordColor = [];
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+ var colorIdx = 0;
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+ var matchRegex = "";
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+ var matchingSlides = [];
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+
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+ this.setRegex = function(input)
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+ {
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+ input = input.replace(/^[^\w]+|[^\w]+$/g, "").replace(/[^\w'-]+/g, "|");
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+ matchRegex = new RegExp("(" + input + ")","i");
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+ }
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+
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+ this.getRegex = function()
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+ {
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+ return matchRegex.toString().replace(/^\/\\b\(|\)\\b\/i$/g, "").replace(/\|/g, " ");
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+ }
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+
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+ // recursively apply word highlighting
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+ this.hiliteWords = function(node)
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+ {
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+ if(node == undefined || !node) return;
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+ if(!matchRegex) return;
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+ if(skipTags.test(node.nodeName)) return;
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+
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+ if(node.hasChildNodes()) {
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+ for(var i=0; i < node.childNodes.length; i++)
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+ this.hiliteWords(node.childNodes[i]);
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+ }
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+ if(node.nodeType == 3) { // NODE_TEXT
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+ if((nv = node.nodeValue) && (regs = matchRegex.exec(nv))) {
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+ //find the slide's section element and save it in our list of matching slides
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+ var secnode = node;
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+ while (secnode != null && secnode.nodeName != 'SECTION') {
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+ secnode = secnode.parentNode;
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+ }
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+
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+ var slideIndex = Reveal.getIndices(secnode);
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+ var slidelen = matchingSlides.length;
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+ var alreadyAdded = false;
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+ for (var i=0; i < slidelen; i++) {
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+ if ( (matchingSlides[i].h === slideIndex.h) && (matchingSlides[i].v === slideIndex.v) ) {
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+ alreadyAdded = true;
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+ }
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+ }
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+ if (! alreadyAdded) {
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+ matchingSlides.push(slideIndex);
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+ }
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+
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+ if(!wordColor[regs[0].toLowerCase()]) {
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+ wordColor[regs[0].toLowerCase()] = colors[colorIdx++ % colors.length];
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+ }
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+
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+ var match = document.createElement(hiliteTag);
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+ match.appendChild(document.createTextNode(regs[0]));
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+ match.style.backgroundColor = wordColor[regs[0].toLowerCase()];
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+ match.style.fontStyle = "inherit";
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+ match.style.color = "#000";
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+
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+ var after = node.splitText(regs.index);
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+ after.nodeValue = after.nodeValue.substring(regs[0].length);
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+ node.parentNode.insertBefore(match, after);
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+ }
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+ }
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+ };
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+
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+ // remove highlighting
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+ this.remove = function()
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+ {
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+ var arr = document.getElementsByTagName(hiliteTag);
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+ while(arr.length && (el = arr[0])) {
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+ el.parentNode.replaceChild(el.firstChild, el);
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+ }
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+ };
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+
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+ // start highlighting at target node
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+ this.apply = function(input)
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+ {
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+ if(input == undefined || !input) return;
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+ this.remove();
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+ this.setRegex(input);
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+ this.hiliteWords(targetNode);
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+ return matchingSlides;
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+ };
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+
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+}
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+
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+ function openSearch() {
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+ //ensure the search term input dialog is visible and has focus:
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+ var inputboxdiv = document.getElementById("searchinputdiv");
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+ var inputbox = document.getElementById("searchinput");
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+ inputboxdiv.style.display = "inline";
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+ inputbox.focus();
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+ inputbox.select();
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+ }
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+
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+ function closeSearch() {
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+ var inputboxdiv = document.getElementById("searchinputdiv");
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+ inputboxdiv.style.display = "none";
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+ if(myHilitor) myHilitor.remove();
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+ }
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+
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+ function toggleSearch() {
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+ var inputboxdiv = document.getElementById("searchinputdiv");
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+ if (inputboxdiv.style.display !== "inline") {
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+ openSearch();
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+ }
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+ else {
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+ closeSearch();
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+ }
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+ }
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+
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+ function doSearch() {
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+ //if there's been a change in the search term, perform a new search:
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+ if (searchboxDirty) {
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+ var searchstring = document.getElementById("searchinput").value;
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+
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+ if (searchstring === '') {
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+ if(myHilitor) myHilitor.remove();
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+ matchedSlides = null;
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+ }
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+ else {
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+ //find the keyword amongst the slides
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+ myHilitor = new Hilitor("slidecontent");
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+ matchedSlides = myHilitor.apply(searchstring);
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+ currentMatchedIndex = 0;
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+ }
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+ }
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+
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+ if (matchedSlides) {
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+ //navigate to the next slide that has the keyword, wrapping to the first if necessary
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+ if (matchedSlides.length && (matchedSlides.length <= currentMatchedIndex)) {
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+ currentMatchedIndex = 0;
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+ }
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+ if (matchedSlides.length > currentMatchedIndex) {
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+ Reveal.slide(matchedSlides[currentMatchedIndex].h, matchedSlides[currentMatchedIndex].v);
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+ currentMatchedIndex++;
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+ }
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+ }
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+ }
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+
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+ var dom = {};
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+ dom.wrapper = document.querySelector( '.reveal' );
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+
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+ if( !dom.wrapper.querySelector( '.searchbox' ) ) {
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+ var searchElement = document.createElement( 'div' );
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+ searchElement.id = "searchinputdiv";
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+ searchElement.classList.add( 'searchdiv' );
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+ searchElement.style.position = 'absolute';
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+ searchElement.style.top = '10px';
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+ searchElement.style.right = '10px';
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+ searchElement.style.zIndex = 10;
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+ //embedded base64 search icon Designed by Sketchdock - http://www.sketchdock.com/:
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+ searchElement.innerHTML = '<span><input type="search" id="searchinput" class="searchinput" style="vertical-align: top;"/><img src="data:image/png;base64,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" id="searchbutton" class="searchicon" style="vertical-align: top; margin-top: -1px;"/></span>';
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+ dom.wrapper.appendChild( searchElement );
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+ }
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+
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+ document.getElementById( 'searchbutton' ).addEventListener( 'click', function(event) {
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+ doSearch();
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+ }, false );
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+
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+ document.getElementById( 'searchinput' ).addEventListener( 'keyup', function( event ) {
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+ switch (event.keyCode) {
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+ case 13:
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+ event.preventDefault();
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+ doSearch();
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+ searchboxDirty = false;
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+ break;
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+ default:
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+ searchboxDirty = true;
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+ }
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+ }, false );
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+
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+ document.addEventListener( 'keydown', function( event ) {
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+ if( event.key == "F" && (event.ctrlKey || event.metaKey) ) { //Control+Shift+f
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+ event.preventDefault();
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+ toggleSearch();
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+ }
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+ }, false );
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+ if( window.Reveal ) Reveal.registerKeyboardShortcut( 'Ctrl-Shift-F', 'Search' );
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+ closeSearch();
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+ return { open: openSearch };
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+})();
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