DevTools: edit SASS through SourceMaps.

Source/devtools/front_end/common/TextRange.js

Index: Source/devtools/front_end/common/TextRange.js
diff --git a/Source/devtools/front_end/common/TextRange.js b/Source/devtools/front_end/common/TextRange.js
index 9c1bcd987e2a5935218523d15168961bda1724a1..083dc49631c61bee67ae6dc9befa3c483d75b464 100644
--- a/Source/devtools/front_end/common/TextRange.js
+++ b/Source/devtools/front_end/common/TextRange.js
@@ -54,6 +54,30 @@ WebInspector.TextRange.createFromLocation = function(line, column)
 }
 
 /**
+ * @param {string} text
+ * @param {!WebInspector.SourceRange} range
+ * @return {!WebInspector.TextRange}
+ */
+WebInspector.TextRange.createFromSourceRange = function(text, range)
+{
+    var start = p(text, range.offset);
+    var end = p(text, range.offset + range.length);
+    return new WebInspector.TextRange(start.startLine, start.startColumn, end.endLine, end.endColumn);
+
+    /**
+     * @param {string} text
+     * @param {number} offset
+     */
+    function p(text, offset)
+    {
+        var lineEndings = text.lineEndings();
+        var lineIndex = lineEndings.lowerBound(offset);
+        var lineStartOffset = lineIndex > 0 ? lineEndings[lineIndex - 1] + 1 : 0;
+        return WebInspector.TextRange.createFromLocation(lineIndex, offset - lineStartOffset);
+    }
+}
+
+/**
  * @param {!Object} serializedTextRange
  * @return {!WebInspector.TextRange}
  */
@@ -276,7 +300,35 @@ WebInspector.TextRange.prototype = {
     {
         var sourceRange = this.toSourceRange(text);
         return text.substring(0, sourceRange.offset) + replacement + text.substring(sourceRange.offset + sourceRange.length);
-    }
+    },
+
+    extract: function(text)
+    {
+        var sourceRange = this.toSourceRange(text);
+        return text.substr(sourceRange.offset, sourceRange.length);
+    },
+
+    /**
+     * @param {number} lineNumber
+     * @param {number} columnNumber
+     * @return {boolean}
+     */
+    containsLocation: function(lineNumber, columnNumber)
+    {
+        if (this.startLine > lineNumber)
+            return false;
+        if (this.endLine < lineNumber)
+            return false;
+        if (this.startLine < lineNumber && lineNumber < this.endLine)
+            return true;
+        if (this.startLine === this.endLine && this.startLine === lineNumber)
+            return this.startColumn < columnNumber && columnNumber < this.endColumn;
+        if (this.startLine === lineNumber)
+            return this.startColumn < columnNumber;
+        if (this.endLine === lineNumber)
+            return this.endColumn > columnNumber;
+        return false;
+    },
 }
 
 /**