| /******************************************************************************* |
| * Copyright (c) 2005, 2013 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Bjorn Freeman-Benson - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.debug.examples.ui.pda.editor; |
| |
| import org.eclipse.debug.examples.ui.pda.DebugUIPlugin; |
| import org.eclipse.jface.text.TextAttribute; |
| import org.eclipse.jface.text.rules.BufferedRuleBasedScanner; |
| import org.eclipse.jface.text.rules.IRule; |
| import org.eclipse.jface.text.rules.IWordDetector; |
| import org.eclipse.jface.text.rules.Token; |
| import org.eclipse.jface.text.rules.WordRule; |
| |
| |
| /** |
| * PDA editor keyword scanner. |
| */ |
| public class PDAScanner extends BufferedRuleBasedScanner { |
| |
| /** |
| * PDA keywods |
| */ |
| public static final String[] fgKeywords = new String[] { |
| "add", "branch_not_zero", "call", "dec", "dup", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ |
| "halt", "output", "pop", "push", "return", "var" //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ //$NON-NLS-6$ |
| }; |
| |
| /** |
| * Detects potential keywords |
| */ |
| static class PDAWordDetector implements IWordDetector { |
| |
| @Override |
| public boolean isWordStart(char c) { |
| return Character.isLetter(c); |
| } |
| |
| @Override |
| public boolean isWordPart(char c) { |
| return Character.isLetter(c) || c == '_'; |
| } |
| } |
| |
| /** |
| * Detects PDA branch labels |
| */ |
| class PDALabelDetector extends PDAWordDetector { |
| |
| @Override |
| public boolean isWordStart(char c) { |
| return c == ':'; |
| } |
| |
| @Override |
| public boolean isWordPart(char c) { |
| return super.isWordPart(c) || Character.isDigit(c); |
| } |
| } |
| |
| /** |
| * Constructs a scanner that identifies PDA keywords. |
| */ |
| public PDAScanner() { |
| // keywords |
| Token token = new Token(new TextAttribute(DebugUIPlugin.getDefault().getColor(DebugUIPlugin.KEYWORD))); |
| WordRule keywords = new WordRule(new PDAWordDetector()); |
| for (int i = 0; i < fgKeywords.length; i++) { |
| String keyword = fgKeywords[i]; |
| keywords.addWord(keyword, token); |
| } |
| // labels |
| token = new Token(new TextAttribute(DebugUIPlugin.getDefault().getColor(DebugUIPlugin.LABEL))); |
| WordRule labels = new WordRule(new PDALabelDetector(), token); |
| setRules(new IRule[]{keywords, labels}); |
| } |
| } |