// 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);
}
}
}