/**
- * @class Ext.util.CSS
- * Utility class for manipulating CSS rules
- * @singleton
- */
-Ext.util.CSS = function(){
- var rules = null;
- var doc = document;
-
- var camelRe = /(-[a-z])/gi;
- var camelFn = function(m, a){ return a.charAt(1).toUpperCase(); };
-
- return {
- /**
- * Creates a stylesheet from a text blob of rules.
- * These rules will be wrapped in a STYLE tag and appended to the HEAD of the document.
- * @param {String} cssText The text containing the css rules
- * @param {String} id An id to add to the stylesheet for later removal
- * @return {StyleSheet}
- */
- createStyleSheet : function(cssText, id){
- var ss;
- var head = doc.getElementsByTagName("head")[0];
- var rules = doc.createElement("style");
- rules.setAttribute("type", "text/css");
- if(id){
- rules.setAttribute("id", id);
- }
- if(Ext.isIE){
- head.appendChild(rules);
- ss = rules.styleSheet;
- ss.cssText = cssText;
- }else{
- try{
- rules.appendChild(doc.createTextNode(cssText));
- }catch(e){
- rules.cssText = cssText;
- }
- head.appendChild(rules);
- ss = rules.styleSheet ? rules.styleSheet : (rules.sheet || doc.styleSheets[doc.styleSheets.length-1]);
- }
- this.cacheStyleSheet(ss);
- return ss;
- },
-
- /**
- * Removes a style or link tag by id
- * @param {String} id The id of the tag
- */
- removeStyleSheet : function(id){
- var existing = doc.getElementById(id);
- if(existing){
- existing.parentNode.removeChild(existing);
- }
- },
-
- /**
- * Dynamically swaps an existing stylesheet reference for a new one
- * @param {String} id The id of an existing link tag to remove
- * @param {String} url The href of the new stylesheet to include
- */
- swapStyleSheet : function(id, url){
- this.removeStyleSheet(id);
- var ss = doc.createElement("link");
- ss.setAttribute("rel", "stylesheet");
- ss.setAttribute("type", "text/css");
- ss.setAttribute("id", id);
- ss.setAttribute("href", url);
- doc.getElementsByTagName("head")[0].appendChild(ss);
- },
-
- /**
- * Refresh the rule cache if you have dynamically added stylesheets
- * @return {Object} An object (hash) of rules indexed by selector
- */
- refreshCache : function(){
- return this.getRules(true);
- },
-
- // private
- cacheStyleSheet : function(ss){
- if(!rules){
- rules = {};
- }
- try{// try catch for cross domain access issue
- var ssRules = ss.cssRules || ss.rules;
- for(var j = ssRules.length-1; j >= 0; --j){
- rules[ssRules[j].selectorText.toLowerCase()] = ssRules[j];
- }
- }catch(e){}
- },
-
- /**
- * Gets all css rules for the document
- * @param {Boolean} refreshCache true to refresh the internal cache
- * @return {Object} An object (hash) of rules indexed by selector
- */
- getRules : function(refreshCache){
- if(rules === null || refreshCache){
- rules = {};
- var ds = doc.styleSheets;
- for(var i =0, len = ds.length; i < len; i++){
- try{
- this.cacheStyleSheet(ds[i]);
- }catch(e){}
- }
- }
- return rules;
- },
-
- /**
- * Gets an an individual CSS rule by selector(s)
- * @param {String/Array} selector The CSS selector or an array of selectors to try. The first selector that is found is returned.
- * @param {Boolean} refreshCache true to refresh the internal cache if you have recently updated any rules or added styles dynamically
- * @return {CSSRule} The CSS rule or null if one is not found
- */
- getRule : function(selector, refreshCache){
- var rs = this.getRules(refreshCache);
- if(!Ext.isArray(selector)){
- return rs[selector.toLowerCase()];
- }
- for(var i = 0; i < selector.length; i++){
- if(rs[selector[i]]){
- return rs[selector[i].toLowerCase()];
- }
- }
- return null;
- },
-
-
- /**
- * Updates a rule property
- * @param {String/Array} selector If it's an array it tries each selector until it finds one. Stops immediately once one is found.
- * @param {String} property The css property
- * @param {String} value The new value for the property
- * @return {Boolean} true If a rule was found and updated
- */
- updateRule : function(selector, property, value){
- if(!Ext.isArray(selector)){
- var rule = this.getRule(selector);
- if(rule){
- rule.style[property.replace(camelRe, camelFn)] = value;
- return true;
- }
- }else{
- for(var i = 0; i < selector.length; i++){
- if(this.updateRule(selector[i], property, value)){
- return true;
- }
- }
- }
- return false;
- }
- };
-}();
-
+
+
+
+ The source code
+
+
+
+
+
/*!
+ * Ext JS Library 3.3.1
+ * Copyright(c) 2006-2010 Sencha Inc.
+ * licensing@sencha.com
+ * http://www.sencha.com/license
+ */
+/**
+ * @class Ext.util.CSS
+ * Utility class for manipulating CSS rules
+ * @singleton
+ */
+Ext.util.CSS = function(){
+ var rules = null;
+ var doc = document;
+
+ var camelRe = /(-[a-z])/gi;
+ var camelFn = function(m, a){ return a.charAt(1).toUpperCase(); };
+
+ return {
+ /**
+ * Creates a stylesheet from a text blob of rules.
+ * These rules will be wrapped in a STYLE tag and appended to the HEAD of the document.
+ * @param {String} cssText The text containing the css rules
+ * @param {String} id An id to add to the stylesheet for later removal
+ * @return {StyleSheet}
+ */
+ createStyleSheet : function(cssText, id){
+ var ss;
+ var head = doc.getElementsByTagName("head")[0];
+ var rules = doc.createElement("style");
+ rules.setAttribute("type", "text/css");
+ if(id){
+ rules.setAttribute("id", id);
+ }
+ if(Ext.isIE){
+ head.appendChild(rules);
+ ss = rules.styleSheet;
+ ss.cssText = cssText;
+ }else{
+ try{
+ rules.appendChild(doc.createTextNode(cssText));
+ }catch(e){
+ rules.cssText = cssText;
+ }
+ head.appendChild(rules);
+ ss = rules.styleSheet ? rules.styleSheet : (rules.sheet || doc.styleSheets[doc.styleSheets.length-1]);
+ }
+ this.cacheStyleSheet(ss);
+ return ss;
+ },
+
+ /**
+ * Removes a style or link tag by id
+ * @param {String} id The id of the tag
+ */
+ removeStyleSheet : function(id){
+ var existing = doc.getElementById(id);
+ if(existing){
+ existing.parentNode.removeChild(existing);
+ }
+ },
+
+ /**
+ * Dynamically swaps an existing stylesheet reference for a new one
+ * @param {String} id The id of an existing link tag to remove
+ * @param {String} url The href of the new stylesheet to include
+ */
+ swapStyleSheet : function(id, url){
+ this.removeStyleSheet(id);
+ var ss = doc.createElement("link");
+ ss.setAttribute("rel", "stylesheet");
+ ss.setAttribute("type", "text/css");
+ ss.setAttribute("id", id);
+ ss.setAttribute("href", url);
+ doc.getElementsByTagName("head")[0].appendChild(ss);
+ },
+
+ /**
+ * Refresh the rule cache if you have dynamically added stylesheets
+ * @return {Object} An object (hash) of rules indexed by selector
+ */
+ refreshCache : function(){
+ return this.getRules(true);
+ },
+
+ // private
+ cacheStyleSheet : function(ss){
+ if(!rules){
+ rules = {};
+ }
+ try{// try catch for cross domain access issue
+ var ssRules = ss.cssRules || ss.rules;
+ for(var j = ssRules.length-1; j >= 0; --j){
+ rules[ssRules[j].selectorText.toLowerCase()] = ssRules[j];
+ }
+ }catch(e){}
+ },
+
+ /**
+ * Gets all css rules for the document
+ * @param {Boolean} refreshCache true to refresh the internal cache
+ * @return {Object} An object (hash) of rules indexed by selector
+ */
+ getRules : function(refreshCache){
+ if(rules === null || refreshCache){
+ rules = {};
+ var ds = doc.styleSheets;
+ for(var i =0, len = ds.length; i < len; i++){
+ try{
+ this.cacheStyleSheet(ds[i]);
+ }catch(e){}
+ }
+ }
+ return rules;
+ },
+
+ /**
+ * Gets an an individual CSS rule by selector(s)
+ * @param {String/Array} selector The CSS selector or an array of selectors to try. The first selector that is found is returned.
+ * @param {Boolean} refreshCache true to refresh the internal cache if you have recently updated any rules or added styles dynamically
+ * @return {CSSRule} The CSS rule or null if one is not found
+ */
+ getRule : function(selector, refreshCache){
+ var rs = this.getRules(refreshCache);
+ if(!Ext.isArray(selector)){
+ return rs[selector.toLowerCase()];
+ }
+ for(var i = 0; i < selector.length; i++){
+ if(rs[selector[i]]){
+ return rs[selector[i].toLowerCase()];
+ }
+ }
+ return null;
+ },
+
+
+ /**
+ * Updates a rule property
+ * @param {String/Array} selector If it's an array it tries each selector until it finds one. Stops immediately once one is found.
+ * @param {String} property The css property
+ * @param {String} value The new value for the property
+ * @return {Boolean} true If a rule was found and updated
+ */
+ updateRule : function(selector, property, value){
+ if(!Ext.isArray(selector)){
+ var rule = this.getRule(selector);
+ if(rule){
+ rule.style[property.replace(camelRe, camelFn)] = value;
+ return true;
+ }
+ }else{
+ for(var i = 0; i < selector.length; i++){
+ if(this.updateRule(selector[i], property, value)){
+ return true;
+ }
+ }
+ }
+ return false;
+ }
+ };
+}();