1 files changed, 87 insertions, 0 deletions
diff --git a/Source/WebInspectorUI/UserInterface/FormatterSourceMap.js b/Source/WebInspectorUI/UserInterface/FormatterSourceMap.js
new file mode 100644
index 000000000..b58d22a4d
--- /dev/null
+++ b/Source/WebInspectorUI/UserInterface/FormatterSourceMap.js
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WebInspector.FormatterSourceMap = function(originalLineEndings, formattedLineEndings, mapping)
+{
+    WebInspector.Object.call(this);
+
+    this._originalLineEndings = originalLineEndings;
+    this._formattedLineEndings = formattedLineEndings;
+    this._mapping = mapping;
+};
+
+WebInspector.FormatterSourceMap.fromBuilder = function(builder)
+{
+    return new WebInspector.FormatterSourceMap(builder.originalLineEndings, builder.formattedLineEndings, builder.mapping);
+}
+
+WebInspector.FormatterSourceMap.prototype = {
+    constructor: WebInspector.FormatterSourceMap,
+
+    // Public
+
+    originalToFormatted: function(lineNumber, columnNumber)
+    {
+        var originalPosition = this._locationToPosition(this._originalLineEndings, lineNumber || 0, columnNumber || 0);
+        var formattedPosition = this._convertPosition(this._mapping.original, this._mapping.formatted, originalPosition);
+        return this._positionToLocation(this._formattedLineEndings, formattedPosition);
+    },
+
+    formattedToOriginal: function(lineNumber, columnNumber)
+    {
+        var formattedPosition = this._locationToPosition(this._formattedLineEndings, lineNumber || 0, columnNumber || 0);
+        var originalPosition = this._convertPosition(this._mapping.formatted, this._mapping.original, formattedPosition);
+        return this._positionToLocation(this._originalLineEndings, originalPosition);
+    },
+
+    // Private
+
+    _locationToPosition: function(lineEndings, lineNumber, columnNumber)
+    {
+        var lineOffset = lineNumber ? lineEndings[lineNumber - 1] + 1 : 0;
+        return lineOffset + columnNumber;
+    },
+
+    _positionToLocation: function(lineEndings, position)
+    {
+        var lineNumber = lineEndings.upperBound(position - 1);
+        if (!lineNumber)
+            var columnNumber = position;
+        else
+            var columnNumber = position - lineEndings[lineNumber - 1] - 1;
+        return {lineNumber:lineNumber, columnNumber:columnNumber};
+    },
+
+    _convertPosition: function(positions1, positions2, positionInPosition1)
+    {
+        var index = positions1.upperBound(positionInPosition1) - 1;
+        var convertedPosition = positions2[index] + positionInPosition1 - positions1[index];
+        if (index < positions2.length - 1 && convertedPosition > positions2[index + 1])
+            convertedPosition = positions2[index + 1];
+        return convertedPosition;
+    }
+};
+
+WebInspector.FormatterSourceMap.__proto__ = WebInspector.Object;