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Diffstat (limited to 'presentation/plugin/search/search.js')
| -rw-r--r-- | presentation/plugin/search/search.js | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/presentation/plugin/search/search.js b/presentation/plugin/search/search.js new file mode 100644 index 0000000..307d72f --- /dev/null +++ b/presentation/plugin/search/search.js @@ -0,0 +1,198 @@ +/* + * 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}; +})(); |