Preliminary genom of cssUtils

1 files changed, 77 insertions, 0 deletions

diff --git a/data/cssUtils.js b/data/cssUtils.js
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+/*global console: false */
+/*jslint onevar: false */
+// Released under the MIT/X11 license
+// http://www.opensource.org/licenses/mit-license.php
+"use strict";
+
+/**
+ * get CSS style from all styles in the document with given name
+ *
+ * @param ruleName String with the identificator of the rule (the same
+ *         used on the page itself)
+ * @param deleteFlag ???
+ * @return ??? (exact type of the object returned FIXME)
+ *
+ * e.g., getCSSRule(".tramp") gives particular style
+ * from http://www.hunlock.com/blogs/Totally_Pwn_CSS_with_Javascript
+ */
+var getCSSRule = exports.getCSSRule = function getCSSRule(ruleName, deleteFlag) {
+    ruleName=ruleName.toLowerCase(); // style rules are case insensitive
+    var foundRuleIdx = 0;
+    
+    Array.forEach(document.styleSheets, function (sheet) {
+        var ruleIdx = 0;
+        foundRule = Array.reduce(sheet.cssRules, function (ruleIdx, curRule, idx) {
+            if ((foundRuleIdx === 0) && (curRule.
+                    selectorText.toLowerCase() == ruleName)) {
+                return idx;
+            }
+            return foundRuleIdx;
+        });
+        if (foundRules > 0) {
+            if (deleteFlag === "delete") {
+                sheet.deleteRule(foundRuleIdx);
+                return true;
+            }
+            return sheet.cssRules[foundRuleIdx];
+        }
+    });
+    return false; // we found NOTHING!
+};
+    
+/**
+ *
+ */
+exports.killCSSRule = function killCSSRule (ruleName) {
+    return getCSSRule(ruleName, "delete");
+};
+
+/**
+ *
+ */
+exports.addCSSRule = function addCSSRule(ruleName, stylesheetTitle) {
+    var sheets = {};
+    if (!getCSSRule(ruleName)) {
+        if (stylesheetTitle) {
+            sheets = Array.filter(document.styleSheets,function (sheet) {
+                return (sheet.title === stylesheetTitle);
+            });
+        } else {
+            sheets = document.styleSheets;
+        }
+        sheets[0].insertRule(ruleName+' { }', 0);
+    }
+    return getCSSRule(ruleName);
+};
+
+/**
+ *
+ */
+exports.addCSSStylesheet = function addCSSStylesheet (StylesheetName) {
+    var cssNode = document.createElement("style");
+    cssNode.type = 'text/css';
+    cssNode.rel = 'stylesheet';
+    cssNode.media = 'screen';
+    cssNode.title = StylesheetName;
+    document.getElementsByTagName("head")[0].appendChild(cssNode);
+};