CodePropertyPage.java

/*******************************************************************************
 * Copyright (c) 2008 Scott Stanchfield, based on ANTLR-Eclipse plugin
 *   by Torsten Juergeleit.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors
 *    Torsten Juergeleit - original ANTLR Eclipse plugin
 *    Scott Stanchfield - modifications for ANTXR
 *******************************************************************************/
package com.javadude.antxr.eclipse.ui.properties;

import java.util.StringTokenizer;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.dialogs.PropertyPage;

import com.javadude.antxr.eclipse.core.builder.AntxrBuilder;

/**
 * Properties page for Java files.
 * If the Java file is generated via ANTXR then the name of the according ANTXR
 * grammar file is displayed.
 */
public class CodePropertyPage extends PropertyPage {

    private static final String GRAMMAR_LABEL = "Grammar:";
    private static final String COMMAND_LINE_OPTIONS_LABEL = "Command-line Options:";

    /**
     * @see PreferencePage#createContents(Composite)
     */
    protected Control createContents(Composite aParent) {

        // Get ANTXR grammar name from file property
        String grammar = "";
        String commandLineOptions = "";
        try {
            grammar = ((IResource)getElement()).getPersistentProperty(
                                             AntxrBuilder.GRAMMAR_ECLIPSE_PROPERTY);
            commandLineOptions = ((IResource)getElement()).getPersistentProperty(
                                             AntxrBuilder.COMMAND_LINE_OPTIONS_PROPERTY);
        }
        catch (CoreException e) {
            // ignore - likely just due to upgrade
        }

        // If ANTXR grammar property found then display it
        Composite composite;
        if (grammar != null) {
            composite = new Composite(aParent, SWT.NULL);
            GridLayout layout = new GridLayout();
            layout.numColumns = 2;
            composite.setLayout(layout);

            new Label(composite, SWT.NONE).setText(CodePropertyPage.GRAMMAR_LABEL);
            new Text(composite, SWT.READ_ONLY).setText(grammar);
            new Label(composite, SWT.NONE).setText(CodePropertyPage.COMMAND_LINE_OPTIONS_LABEL);
            StringTokenizer tokenizer = new StringTokenizer(commandLineOptions, "|");
            if (tokenizer.hasMoreTokens()) {
	            new Text(composite, SWT.READ_ONLY).setText(tokenizer.nextToken());
            }
            while(tokenizer.hasMoreTokens()) {
                new Label(composite, SWT.NONE); // blank
                new Text(composite, SWT.READ_ONLY).setText(tokenizer.nextToken());
            }
        } else {
            composite = aParent;
        }
        noDefaultAndApplyButton();
        return composite;
    }
}