mirror of
https://github.com/silverstripe/doc.silverstripe.org
synced 2024-10-22 17:05:50 +02:00
86 lines
2.3 KiB
JavaScript
86 lines
2.3 KiB
JavaScript
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/*
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* common/js/loader.js
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* Common file, to be included before any of the other common/js scripts
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*/
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/*
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* Gracefully deal with a whole lot of modules wanting to set the onload() event handler
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*/
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if(typeof _LOADERS == 'undefined') _LOADERS = Array();
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function callAllLoaders() {
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var i, loaderFunc;
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for(i=0;i<_LOADERS.length;i++) {
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loaderFunc = _LOADERS[i];
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if(loaderFunc != callAllLoaders) loaderFunc();
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}
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}
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function appendLoader(loaderFunc) {
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if(window.onload && window.onload != callAllLoaders)
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_LOADERS[_LOADERS.length] = window.onload;
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window.onload = callAllLoaders;
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_LOADERS[_LOADERS.length] = loaderFunc;
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}
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/*
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* Call the given function on any element of the given tag and class
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*/
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function setUpHandlers(tagName,className, handlerFunction) {
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var allElements = document.getElementsByTagName(tagName);
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for(var i = 0;i<allElements.length;i++) {
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if(allElements[i].className) {
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tester = ' ' + allElements[i].className + ' ';
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if(tester.indexOf(' ' + className + ' ') != -1) {
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handlerFunction(allElements[i]);
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}
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}
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}
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}
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/*
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* Return an array of all elements
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*/
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function getAllElements() {
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var allElements = document.getElementsByTagName('*');
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if(allElements.length == 0) return document.all;
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else return allElements;
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}
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/*
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* Functions to add and remove class names
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* Mac IE hates unnecessary spaces
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*/
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function addClass(el, cls, forceBefore) {
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if(!el.className) el.className = "";
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if(forceBefore != null && el.className.match(new RegExp('(^| )' + forceBefore))) {
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el.className = el.className.replace(new RegExp("( |^)" + forceBefore), '$1' + cls + ' ' + forceBefore);
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} else if(!el.className.match(new RegExp('(^| )' + cls + '($| )'))) {
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el.className += ' ' + cls;
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el.className = el.className.replace(/(^ +)|( +$)/g, '');
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}
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}
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function removeClass(el, cls) {
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var old = el.className;
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var newCls = ' ' + el.className + ' ';
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newCls = newCls.replace(new RegExp(' (' + cls + ' +)+','g'), ' ');
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el.className = newCls.replace(/(^ +)|( +$)/g, '');
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}
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function removeClasses(el, cls) {
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removeClass(el,cls);
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var items = el.getElementsByTagName('*');
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var i;
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for(i=0;i<items.length;i++) if(items[i].className) removeClass(items[i],cls);
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}
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/*
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* Add an event handler, saving the existing one
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*/
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function addEventHandler(obj, evt, handler) {
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if(obj[evt]) obj['old_' + evt] = obj[evt];
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obj[evt] = handler;
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}
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