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