--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.chromium.debug.ui/src/org/chromium/debug/ui/editors/JsCodeScanner.java	Wed Dec 23 17:13:18 2009 -0800
@@ -0,0 +1,149 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.debug.ui.editors;
+
+import org.eclipse.jface.text.TextAttribute;
+import org.eclipse.jface.text.rules.BufferedRuleBasedScanner;
+import org.eclipse.jface.text.rules.EndOfLineRule;
+import org.eclipse.jface.text.rules.IRule;
+import org.eclipse.jface.text.rules.IWhitespaceDetector;
+import org.eclipse.jface.text.rules.IWordDetector;
+import org.eclipse.jface.text.rules.MultiLineRule;
+import org.eclipse.jface.text.rules.NumberRule;
+import org.eclipse.jface.text.rules.SingleLineRule;
+import org.eclipse.jface.text.rules.Token;
+import org.eclipse.jface.text.rules.WhitespaceRule;
+import org.eclipse.jface.text.rules.WordRule;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.RGB;
+
+/**
+ * JavaScript code scanner for source code highlighting.
+ */
+public class JsCodeScanner extends BufferedRuleBasedScanner {
+
+  private Token commentToken;
+
+  private final TextAttribute commentAttribute =
+      new TextAttribute(EditorColors.getColor(new RGB(63, 127, 95)), null, SWT.NORMAL);
+
+  private final TextAttribute jsDocAttribute =
+      new TextAttribute(EditorColors.getColor(new RGB(127,127,159)), null, SWT.NORMAL);
+
+  public JsCodeScanner() {
+    createRules();
+  }
+
+  public TextAttribute getCommentAttribute() {
+    return commentAttribute;
+  }
+
+  public TextAttribute getJsDocAttribute() {
+    return jsDocAttribute;
+  }
+
+  /**
+   * Use the default Eclipse higlighting scheme.
+   */
+  private void createRules() {
+    Token keywordToken = new Token(
+        new TextAttribute(EditorColors.getColor(new RGB(127, 0, 85)), null, SWT.BOLD));
+
+    commentToken = new Token(commentAttribute);
+
+    Token jsDocToken = new Token(jsDocAttribute);
+
+    Token stringToken = new Token(
+        new TextAttribute(EditorColors.getColor(new RGB(42, 0, 255)), null, SWT.NORMAL));
+
+    RGB blackRgb = new RGB(0, 0, 0);
+
+    Token numberToken = new Token(
+        new TextAttribute(EditorColors.getColor(blackRgb), null, SWT.NORMAL));
+
+    Token normalToken = new Token(
+        new TextAttribute(EditorColors.getColor(blackRgb), null, SWT.NORMAL));
+    setDefaultReturnToken(normalToken);
+
+    setRules(new IRule[] {
+        new EndOfLineRule("//", commentToken), //$NON-NLS-1$
+        new KeywordRule(keywordToken),
+        new MultiLineRule("/**", "*/", jsDocToken, (char) 0, false),  //$NON-NLS-1$ //$NON-NLS-2$
+        new MultiLineRule("/*", "*/", commentToken, (char) 0, false),  //$NON-NLS-1$ //$NON-NLS-2$
+        new SingleLineRule("\"", "\"", stringToken, '\\'), //$NON-NLS-1$ //$NON-NLS-2$
+        // Regexp
+        new SingleLineRule("/", "/", stringToken, '\\'), //$NON-NLS-1$ //$NON-NLS-2$
+        new SingleLineRule("'", "'", stringToken, '\\'), //$NON-NLS-1$ //$NON-NLS-2$
+        new WhitespaceRule(new IWhitespaceDetector() {
+          public boolean isWhitespace(char c) {
+            return Character.isWhitespace(c);
+          }
+        }),
+
+        new WordRule(new WordDetector(), normalToken),
+        new NumberRule(numberToken),
+    });
+  }
+
+  private static class KeywordRule extends WordRule {
+
+    private static final String[] KEYWORDS = {
+      "break", //$NON-NLS-1$
+      "case", //$NON-NLS-1$
+      "catch", //$NON-NLS-1$
+      "const", //$NON-NLS-1$
+      "continue", //$NON-NLS-1$
+      "debugger", //$NON-NLS-1$
+      "default", //$NON-NLS-1$
+      "delete", //$NON-NLS-1$
+      "do", //$NON-NLS-1$
+      "else", //$NON-NLS-1$
+      "false", //$NON-NLS-1$
+      "finally", //$NON-NLS-1$
+      "for", //$NON-NLS-1$
+      "function", //$NON-NLS-1$
+      "if", //$NON-NLS-1$
+      "in", //$NON-NLS-1$
+      "instanceof", //$NON-NLS-1$
+      "new", //$NON-NLS-1$
+      "null", //$NON-NLS-1$
+      "return", //$NON-NLS-1$
+      "switch", //$NON-NLS-1$
+      "this", //$NON-NLS-1$
+      "throw", //$NON-NLS-1$
+      "true", //$NON-NLS-1$
+      "try", //$NON-NLS-1$
+      "typeof", //$NON-NLS-1$
+      "var", //$NON-NLS-1$
+      "void", //$NON-NLS-1$
+      "while", //$NON-NLS-1$
+      "with", //$NON-NLS-1$
+
+      // Highlight important qualifiers
+      "__proto__", //$NON-NLS-1$
+      "prototype", //$NON-NLS-1$
+    };
+
+    public KeywordRule(Token token) {
+      super(new WordDetector());
+
+      for (String word : KEYWORDS) {
+        addWord(word, token);
+      }
+    }
+  }
+
+  private static class WordDetector implements IWordDetector {
+
+    public boolean isWordPart(char c) {
+      return Character.isJavaIdentifierPart(c);
+    }
+
+    public boolean isWordStart(char c) {
+      return Character.isJavaIdentifierStart(c);
+    }
+
+  }
+}