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Merge branch 'searchplugin' of https://github.com/razor-1/reveal.js into dev

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Hakim El Hattab 2013-03-04 17:58:07 -05:00
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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|SPAN)$");
var colors = ["#ff6", "#a0ffff", "#9f9", "#f99", "#f6f"];
var wordColor = [];
var colorIdx = 0;
var matchRegex = "";
var matchingSlides = [];
this.setRegex = function(input)
{
input = input.replace(/^[^\w]+|[^\w]+$/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.parentNode;
while (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 inputbox = document.getElementById("searchinput");
inputbox.style.display = "inline";
inputbox.focus();
inputbox.select();
}
function toggleSearch() {
var inputbox = document.getElementById("searchinput");
if (inputbox.style.display !== "inline") {
openSearch();
}
else {
inputbox.style.display = "none";
myHilitor.remove();
}
}
function doSearch() {
//if there's been a change in the search term, perform a new search:
if (searchboxDirty) {
var searchstring = document.getElementById("searchinput").value;
//find the keyword amongst the slides
myHilitor = new Hilitor("slidecontent");
matchedSlides = myHilitor.apply(searchstring);
currentMatchedIndex = 0;
}
//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.innerHTML = '<span><input type="text" id="searchinput" class="searchinput"/><img src="css/theme/assets/searchicon.png" id="searchbutton" class="searchicon"/></span>';
dom.wrapper.appendChild( searchElement );
}
document.getElementById("searchbutton").addEventListener( 'click', function(event) {
toggleSearch();
}, false );
document.getElementById("searchinput").addEventListener( 'keyup', function( event ) {
switch (event.keyCode) {
case 13:
event.preventDefault();
doSearch();
searchboxDirty = false;
break;
default:
searchboxDirty = true;
}
}, false );
// Open the search when the 's' key is hit (yes, this conflicts with the notes plugin, disabling for now)
/*
document.addEventListener( 'keydown', function( event ) {
// Disregard the event if the target is editable or a
// modifier is present
if ( document.querySelector( ':focus' ) !== null || event.shiftKey || event.altKey || event.ctrlKey || event.metaKey ) return;
if( event.keyCode === 83 ) {
event.preventDefault();
openSearch();
}
}, false );
*/
return { open: openSearch };
})();