Christophe Dervieux | e1893ae | 2021-10-07 17:09:02 +0200 | [diff] [blame] | 1 | /*! |
| 2 | * Handles finding a text string anywhere in the slides and showing the next occurrence to the user |
| 3 | * by navigatating to that slide and highlighting it. |
| 4 | * |
| 5 | * @author Jon Snyder <snyder.jon@gmail.com>, February 2013 |
| 6 | */ |
| 7 | |
| 8 | const Plugin = () => { |
| 9 | |
| 10 | // The reveal.js instance this plugin is attached to |
| 11 | let deck; |
| 12 | |
| 13 | let searchElement; |
| 14 | let searchButton; |
| 15 | let searchInput; |
| 16 | |
| 17 | let matchedSlides; |
| 18 | let currentMatchedIndex; |
| 19 | let searchboxDirty; |
| 20 | let hilitor; |
| 21 | |
| 22 | function render() { |
| 23 | |
| 24 | searchElement = document.createElement( 'div' ); |
| 25 | searchElement.classList.add( 'searchbox' ); |
| 26 | searchElement.style.position = 'absolute'; |
| 27 | searchElement.style.top = '10px'; |
| 28 | searchElement.style.right = '10px'; |
| 29 | searchElement.style.zIndex = 10; |
| 30 | |
| 31 | //embedded base64 search icon Designed by Sketchdock - http://www.sketchdock.com/: |
| 32 | searchElement.innerHTML = `<input type="search" class="searchinput" placeholder="Search..." style="vertical-align: top;"/> |
| 33 | </span>`; |
| 34 | |
| 35 | searchInput = searchElement.querySelector( '.searchinput' ); |
| 36 | searchInput.style.width = '240px'; |
| 37 | searchInput.style.fontSize = '14px'; |
| 38 | searchInput.style.padding = '4px 6px'; |
| 39 | searchInput.style.color = '#000'; |
| 40 | searchInput.style.background = '#fff'; |
| 41 | searchInput.style.borderRadius = '2px'; |
| 42 | searchInput.style.border = '0'; |
| 43 | searchInput.style.outline = '0'; |
| 44 | searchInput.style.boxShadow = '0 2px 18px rgba(0, 0, 0, 0.2)'; |
| 45 | searchInput.style['-webkit-appearance'] = 'none'; |
| 46 | |
| 47 | deck.getRevealElement().appendChild( searchElement ); |
| 48 | |
| 49 | // searchButton.addEventListener( 'click', function(event) { |
| 50 | // doSearch(); |
| 51 | // }, false ); |
| 52 | |
| 53 | searchInput.addEventListener( 'keyup', function( event ) { |
| 54 | switch (event.keyCode) { |
| 55 | case 13: |
| 56 | event.preventDefault(); |
| 57 | doSearch(); |
| 58 | searchboxDirty = false; |
| 59 | break; |
| 60 | default: |
| 61 | searchboxDirty = true; |
| 62 | } |
| 63 | }, false ); |
| 64 | |
| 65 | closeSearch(); |
| 66 | |
| 67 | } |
| 68 | |
| 69 | function openSearch() { |
| 70 | if( !searchElement ) render(); |
| 71 | |
| 72 | searchElement.style.display = 'inline'; |
| 73 | searchInput.focus(); |
| 74 | searchInput.select(); |
| 75 | } |
| 76 | |
| 77 | function closeSearch() { |
| 78 | if( !searchElement ) render(); |
| 79 | |
| 80 | searchElement.style.display = 'none'; |
| 81 | if(hilitor) hilitor.remove(); |
| 82 | } |
| 83 | |
| 84 | function toggleSearch() { |
| 85 | if( !searchElement ) render(); |
| 86 | |
| 87 | if (searchElement.style.display !== 'inline') { |
| 88 | openSearch(); |
| 89 | } |
| 90 | else { |
| 91 | closeSearch(); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | function doSearch() { |
| 96 | //if there's been a change in the search term, perform a new search: |
| 97 | if (searchboxDirty) { |
| 98 | var searchstring = searchInput.value; |
| 99 | |
| 100 | if (searchstring === '') { |
| 101 | if(hilitor) hilitor.remove(); |
| 102 | matchedSlides = null; |
| 103 | } |
| 104 | else { |
| 105 | //find the keyword amongst the slides |
| 106 | hilitor = new Hilitor("slidecontent"); |
| 107 | matchedSlides = hilitor.apply(searchstring); |
| 108 | currentMatchedIndex = 0; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | if (matchedSlides) { |
| 113 | //navigate to the next slide that has the keyword, wrapping to the first if necessary |
| 114 | if (matchedSlides.length && (matchedSlides.length <= currentMatchedIndex)) { |
| 115 | currentMatchedIndex = 0; |
| 116 | } |
| 117 | if (matchedSlides.length > currentMatchedIndex) { |
| 118 | deck.slide(matchedSlides[currentMatchedIndex].h, matchedSlides[currentMatchedIndex].v); |
| 119 | currentMatchedIndex++; |
| 120 | } |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | // Original JavaScript code by Chirp Internet: www.chirp.com.au |
| 125 | // Please acknowledge use of this code by including this header. |
| 126 | // 2/2013 jon: modified regex to display any match, not restricted to word boundaries. |
| 127 | function Hilitor(id, tag) { |
| 128 | |
| 129 | var targetNode = document.getElementById(id) || document.body; |
| 130 | var hiliteTag = tag || "EM"; |
| 131 | var skipTags = new RegExp("^(?:" + hiliteTag + "|SCRIPT|FORM)$"); |
| 132 | var colors = ["#ff6", "#a0ffff", "#9f9", "#f99", "#f6f"]; |
| 133 | var wordColor = []; |
| 134 | var colorIdx = 0; |
| 135 | var matchRegex = ""; |
| 136 | var matchingSlides = []; |
| 137 | |
| 138 | this.setRegex = function(input) |
| 139 | { |
Marc Kupietz | 9c036a4 | 2024-05-14 13:17:25 +0200 | [diff] [blame] | 140 | input = input.trim(); |
Christophe Dervieux | e1893ae | 2021-10-07 17:09:02 +0200 | [diff] [blame] | 141 | matchRegex = new RegExp("(" + input + ")","i"); |
| 142 | } |
| 143 | |
| 144 | this.getRegex = function() |
| 145 | { |
| 146 | return matchRegex.toString().replace(/^\/\\b\(|\)\\b\/i$/g, "").replace(/\|/g, " "); |
| 147 | } |
| 148 | |
| 149 | // recursively apply word highlighting |
| 150 | this.hiliteWords = function(node) |
| 151 | { |
| 152 | if(node == undefined || !node) return; |
| 153 | if(!matchRegex) return; |
| 154 | if(skipTags.test(node.nodeName)) return; |
| 155 | |
| 156 | if(node.hasChildNodes()) { |
| 157 | for(var i=0; i < node.childNodes.length; i++) |
| 158 | this.hiliteWords(node.childNodes[i]); |
| 159 | } |
| 160 | if(node.nodeType == 3) { // NODE_TEXT |
| 161 | var nv, regs; |
| 162 | if((nv = node.nodeValue) && (regs = matchRegex.exec(nv))) { |
| 163 | //find the slide's section element and save it in our list of matching slides |
| 164 | var secnode = node; |
| 165 | while (secnode != null && secnode.nodeName != 'SECTION') { |
| 166 | secnode = secnode.parentNode; |
| 167 | } |
| 168 | |
| 169 | var slideIndex = deck.getIndices(secnode); |
| 170 | var slidelen = matchingSlides.length; |
| 171 | var alreadyAdded = false; |
| 172 | for (var i=0; i < slidelen; i++) { |
| 173 | if ( (matchingSlides[i].h === slideIndex.h) && (matchingSlides[i].v === slideIndex.v) ) { |
| 174 | alreadyAdded = true; |
| 175 | } |
| 176 | } |
| 177 | if (! alreadyAdded) { |
| 178 | matchingSlides.push(slideIndex); |
| 179 | } |
| 180 | |
| 181 | if(!wordColor[regs[0].toLowerCase()]) { |
| 182 | wordColor[regs[0].toLowerCase()] = colors[colorIdx++ % colors.length]; |
| 183 | } |
| 184 | |
| 185 | var match = document.createElement(hiliteTag); |
| 186 | match.appendChild(document.createTextNode(regs[0])); |
| 187 | match.style.backgroundColor = wordColor[regs[0].toLowerCase()]; |
| 188 | match.style.fontStyle = "inherit"; |
| 189 | match.style.color = "#000"; |
| 190 | |
| 191 | var after = node.splitText(regs.index); |
| 192 | after.nodeValue = after.nodeValue.substring(regs[0].length); |
| 193 | node.parentNode.insertBefore(match, after); |
| 194 | } |
| 195 | } |
| 196 | }; |
| 197 | |
| 198 | // remove highlighting |
| 199 | this.remove = function() |
| 200 | { |
| 201 | var arr = document.getElementsByTagName(hiliteTag); |
| 202 | var el; |
| 203 | while(arr.length && (el = arr[0])) { |
| 204 | el.parentNode.replaceChild(el.firstChild, el); |
| 205 | } |
| 206 | }; |
| 207 | |
| 208 | // start highlighting at target node |
| 209 | this.apply = function(input) |
| 210 | { |
| 211 | if(input == undefined || !input) return; |
| 212 | this.remove(); |
| 213 | this.setRegex(input); |
| 214 | this.hiliteWords(targetNode); |
| 215 | return matchingSlides; |
| 216 | }; |
| 217 | |
| 218 | } |
| 219 | |
| 220 | return { |
| 221 | |
| 222 | id: 'search', |
| 223 | |
| 224 | init: reveal => { |
| 225 | |
| 226 | deck = reveal; |
| 227 | deck.registerKeyboardShortcut( 'CTRL + Shift + F', 'Search' ); |
| 228 | |
| 229 | document.addEventListener( 'keydown', function( event ) { |
| 230 | if( event.key == "F" && (event.ctrlKey || event.metaKey) ) { //Control+Shift+f |
| 231 | event.preventDefault(); |
| 232 | toggleSearch(); |
| 233 | } |
| 234 | }, false ); |
| 235 | |
| 236 | }, |
| 237 | |
| 238 | open: openSearch |
| 239 | |
| 240 | } |
| 241 | }; |
| 242 | |
| 243 | export default Plugin; |