Carica file su 'plugin/search'

plugin/search/search.js

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