/**
- * @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;
- }
- };
-}();
-
-
\ No newline at end of file
+
+
+
+
+ The source code
+
+
+
+
+
+
+
/**
+ * @class Ext.util.CSS
+ * Utility class for manipulating CSS rules
+ * @singleton
+ */
+Ext.define('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 {
+
+ singleton: true,
+
+ constructor: function() {
+ this.rules = {};
+ this.initialized = false;
+ },
+
+ /**
+ * 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,
+ head = doc.getElementsByTagName("head")[0],
+ styleEl = doc.createElement("style");
+
+ styleEl.setAttribute("type", "text/css");
+ if (id) {
+ styleEl.setAttribute("id", id);
+ }
+
+ if (Ext.isIE) {
+ head.appendChild(styleEl);
+ ss = styleEl.styleSheet;
+ ss.cssText = cssText;
+ } else {
+ try{
+ styleEl.appendChild(doc.createTextNode(cssText));
+ } catch(e) {
+ styleEl.cssText = cssText;
+ }
+ head.appendChild(styleEl);
+ ss = styleEl.styleSheet ? styleEl.styleSheet : (styleEl.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 = document.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) {
+ var doc = document;
+ 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,
+ selectorText,
+ i = ssRules.length - 1,
+ j,
+ selectors;
+
+ for (; i >= 0; --i) {
+ selectorText = ssRules[i].selectorText;
+ if (selectorText) {
+
+ // Split in case there are multiple, comma-delimited selectors
+ selectorText = selectorText.split(',');
+ selectors = selectorText.length;
+ for (j = 0; j < selectors; j++) {
+ rules[Ext.String.trim(selectorText[j]).toLowerCase()] = ssRules[i];
+ }
+ }
+ }
+ } 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,
+ i = 0,
+ len = ds.length;
+
+ for (; i < len; i++) {
+ try {
+ if (!ds[i].disabled) {
+ 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;
+ }
+ };
+}());