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+
+
+/**
+ * Copyright 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function makeCSSManager(emptyStylesheetTitle) {
+
+ function getSheetByTitle(title) {
+ var allSheets = document.styleSheets;
+ for(var i=0;i<allSheets.length;i++) {
+ var s = allSheets[i];
+ if (s.title == title) {
+ return s;
+ }
+ }
+ return null;
+ }
+
+ /*function getSheetTagByTitle(title) {
+ var allStyleTags = document.getElementsByTagName("style");
+ for(var i=0;i<allStyleTags.length;i++) {
+ var t = allStyleTags[i];
+ if (t.title == title) {
+ return t;
+ }
+ }
+ return null;
+ }*/
+
+ var browserSheet = getSheetByTitle(emptyStylesheetTitle);
+ //var browserTag = getSheetTagByTitle(emptyStylesheetTitle);
+ function browserRules() { return (browserSheet.cssRules || browserSheet.rules); }
+ function browserDeleteRule(i) {
+ if (browserSheet.deleteRule) browserSheet.deleteRule(i);
+ else browserSheet.removeRule(i);
+ }
+ function browserInsertRule(i, selector) {
+ if (browserSheet.insertRule) browserSheet.insertRule(selector+' {}', i);
+ else browserSheet.addRule(selector, null, i);
+ }
+ var selectorList = [];
+
+ function indexOfSelector(selector) {
+ for(var i=0;i<selectorList.length;i++) {
+ if (selectorList[i] == selector) {
+ return i;
+ }
+ }
+ return -1;
+ }
+
+ function selectorStyle(selector) {
+ var i = indexOfSelector(selector);
+ if (i < 0) {
+ // add selector
+ browserInsertRule(0, selector);
+ selectorList.splice(0, 0, selector);
+ i = 0;
+ }
+ return browserRules().item(i).style;
+ }
+
+ function removeSelectorStyle(selector) {
+ var i = indexOfSelector(selector);
+ if (i >= 0) {
+ browserDeleteRule(i);
+ selectorList.splice(i, 1);
+ }
+ }
+
+ return {selectorStyle:selectorStyle, removeSelectorStyle:removeSelectorStyle,
+ info: function() {
+ return selectorList.length+":"+browserRules().length;
+ }};
+}