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diff --git a/Source/WebInspectorUI/UserInterface/Controllers/Formatter.js b/Source/WebInspectorUI/UserInterface/Controllers/Formatter.js
new file mode 100644
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+++ b/Source/WebInspectorUI/UserInterface/Controllers/Formatter.js
@@ -0,0 +1,167 @@
+/*
+ * 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.Formatter = class Formatter
+{
+    constructor(codeMirror, builder)
+    {
+        console.assert(codeMirror);
+        console.assert(builder);
+
+        this._codeMirror = codeMirror;
+        this._builder = builder;
+
+        this._lastToken = null;
+        this._lastContent = "";
+    }
+
+    // Public
+
+    format(from, to)
+    {
+        console.assert(this._builder.originalContent === null);
+        if (this._builder.originalContent !== null)
+            return;
+
+        var outerMode = this._codeMirror.getMode();
+        var content = this._codeMirror.getRange(from, to);
+        var state = CodeMirror.copyState(outerMode, this._codeMirror.getTokenAt(from).state);
+        this._builder.setOriginalContent(content);
+
+        var lineOffset = 0;
+        var lines = content.split("\n");
+        for (var i = 0; i < lines.length; ++i) {
+            var line = lines[i];
+            var startOfNewLine = true;
+            var firstTokenOnLine = true;
+            var stream = new CodeMirror.StringStream(line);
+            while (!stream.eol()) {
+                var innerMode = CodeMirror.innerMode(outerMode, state);
+                var token = outerMode.token(stream, state);
+                var isWhiteSpace = token === null && /^\s*$/.test(stream.current());
+                this._handleToken(innerMode.mode, token, state, stream, lineOffset + stream.start, isWhiteSpace, startOfNewLine, firstTokenOnLine);
+                stream.start = stream.pos;
+                startOfNewLine = false;
+                if (firstTokenOnLine && !isWhiteSpace)
+                    firstTokenOnLine = false;
+            }
+
+            if (firstTokenOnLine)
+                this._handleEmptyLine();
+
+            lineOffset += line.length + 1; // +1 for the "\n" removed in split.
+            this._handleLineEnding(lineOffset - 1); // -1 for the index of the "\n".
+        }
+
+        this._builder.finish();
+    }
+
+    // Private
+
+    _handleToken(mode, token, state, stream, originalPosition, isWhiteSpace, startOfNewLine, firstTokenOnLine)
+    {
+        // String content of the token.
+        var content = stream.current();
+
+        // Start of a new line. Insert a newline to be safe if code was not-ASI safe. These are collapsed.
+        if (startOfNewLine)
+            this._builder.appendNewline();
+
+        // Whitespace. Remove all spaces or collapse to a single space.
+        if (isWhiteSpace) {
+            this._builder.appendSpace();
+            return;
+        }
+
+        // Avoid some hooks for content in comments.
+        var isComment = token && /\bcomment\b/.test(token);
+
+        if (mode.modifyStateForTokenPre)
+            mode.modifyStateForTokenPre(this._lastToken, this._lastContent, token, state, content, isComment);
+
+        // Should we remove the last whitespace?
+        if (this._builder.lastTokenWasWhitespace && mode.removeLastWhitespace(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.removeLastWhitespace();
+
+        // Should we remove the last newline?
+        if (this._builder.lastTokenWasNewline && mode.removeLastNewline(this._lastToken, this._lastContent, token, state, content, isComment, firstTokenOnLine))
+            this._builder.removeLastNewline();
+
+        // Add whitespace after the last token?
+        if (!this._builder.lastTokenWasWhitespace && mode.shouldHaveSpaceAfterLastToken(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.appendSpace();
+
+        // Add whitespace before this token?
+        if (!this._builder.lastTokenWasWhitespace && mode.shouldHaveSpaceBeforeToken(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.appendSpace();
+
+        // Should we dedent before this token?
+        var dedents = mode.dedentsBeforeToken(this._lastToken, this._lastContent, token, state, content, isComment);
+        while (dedents-- > 0)
+            this._builder.dedent();
+
+        // Should we add a newline before this token?
+        if (mode.newlineBeforeToken(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.appendNewline();
+
+        // Should we indent before this token?
+        if (mode.indentBeforeToken(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.indent();
+
+        // Append token.
+        this._builder.appendToken(content, originalPosition);
+
+        // Let the pretty printer update any state it keeps track of.
+        if (mode.modifyStateForTokenPost)
+            mode.modifyStateForTokenPost(this._lastToken, this._lastContent, token, state, content, isComment);
+
+        // Should we indent or dedent after this token?
+        if (!isComment && mode.indentAfterToken(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.indent();
+
+        // Should we add newlines after this token?
+        var newlines = mode.newlinesAfterToken(this._lastToken, this._lastContent, token, state, content, isComment);
+        if (newlines)
+            this._builder.appendMultipleNewlines(newlines);
+
+        // Record this token as the last token.
+        this._lastToken = token;
+        this._lastContent = content;
+    }
+
+    _handleEmptyLine()
+    {
+        // Preserve original whitespace only lines by adding a newline.
+        // However, don't do this if the builder just added multiple newlines.
+        if (!(this._builder.lastTokenWasNewline && this._builder.lastNewlineAppendWasMultiple))
+            this._builder.appendNewline(true);
+    }
+
+    _handleLineEnding(originalNewLinePosition)
+    {
+        // Record the original line ending.
+        this._builder.addOriginalLineEnding(originalNewLinePosition);
+    }
+};