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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;
}};
}
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