Devtools: [WIP] Implement enhanced devtools extension language APIs

Source/devtools/front_end/common/TextUtils.js

Index: Source/devtools/front_end/common/TextUtils.js
diff --git a/Source/devtools/front_end/common/TextUtils.js b/Source/devtools/front_end/common/TextUtils.js
index 2310478a50c4635b92e7d5122205c2b76a7f31ac..152bfc94b2e03e7fe4066246c9835c858b698448 100644
--- a/Source/devtools/front_end/common/TextUtils.js
+++ b/Source/devtools/front_end/common/TextUtils.js
@@ -148,6 +148,34 @@ WebInspector.TextUtils = {
     isLowerCase: function(text)
     {
         return text === text.toLowerCase();
+    },
+    
+    _lastSectionBeforeQuery: function(text, delimiter)
+    {
+        var lastIndexOfDot = text.lastIndexOf(delimiter);
+        var extension = lastIndexOfDot !== -1 ? text.substr(lastIndexOfDot + 1) : "";
+        var indexOfQuestionMark = extension.indexOf("?");
+        if (indexOfQuestionMark !== -1)
+            extension = extension.substr(0, indexOfQuestionMark);
+        return extension;
+    },
+
+    /**
+     * @param {string} text
+     * @return {string}
+     */
+    extension: function(text)
+    {
+        return WebInspector.TextUtils._lastSectionBeforeQuery(text, ".");
+    },
+    
+    /**
+     * @param {string} text
+     * @return {string}
+     */
+    fileName: function(text)
+    {
+        return WebInspector.TextUtils._lastSectionBeforeQuery(text, "/");
     }
 }