com.aptana.ide.core.internal.ui.WebFilesPropertyTester.java Source code

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Here is the source code for com.aptana.ide.core.internal.ui.WebFilesPropertyTester.java

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/**
 * This file Copyright (c) 2005-2008 Aptana, Inc. This program is
 * dual-licensed under both the Aptana Public License and the GNU General
 * Public license. You may elect to use one or the other of these licenses.
 * 
 * This program is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT. Redistribution, except as permitted by whichever of
 * the GPL or APL you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or modify this
 * program under the terms of the GNU General Public License,
 * Version 3, as published by the Free Software Foundation.  You should
 * have received a copy of the GNU General Public License, Version 3 along
 * with this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Aptana provides a special exception to allow redistribution of this file
 * with certain other free and open source software ("FOSS") code and certain additional terms
 * pursuant to Section 7 of the GPL. You may view the exception and these
 * terms on the web at http://www.aptana.com/legal/gpl/.
 * 
 * 2. For the Aptana Public License (APL), this program and the
 * accompanying materials are made available under the terms of the APL
 * v1.0 which accompanies this distribution, and is available at
 * http://www.aptana.com/legal/apl/.
 * 
 * You may view the GPL, Aptana's exception and additional terms, and the
 * APL in the file titled license.html at the root of the corresponding
 * plugin containing this source file.
 * 
 * Any modifications to this file must keep this entire header intact.
 */

package com.aptana.ide.core.internal.ui;

import java.util.HashSet;
import java.util.Set;

import org.eclipse.core.expressions.PropertyTester;
import org.eclipse.core.resources.IFile;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;

import com.aptana.ide.core.ui.CoreUIPlugin;
import com.aptana.ide.core.ui.preferences.IPreferenceConstants;

/**
 * @author Max Stepanov
 *
 */
public class WebFilesPropertyTester extends PropertyTester {

    private Set<String> extensions;

    /**
     * 
     */
    public WebFilesPropertyTester() {
        super();
        loadExtensions();
        CoreUIPlugin.getDefault().getPreferenceStore().addPropertyChangeListener(new IPropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent event) {
                if (IPreferenceConstants.PREF_FILE_EXPLORER_WEB_FILES.equals(event.getProperty())) {
                    loadExtensions();
                }
            }
        });
    }

    /* (non-Javadoc)
     * @see org.eclipse.core.expressions.PropertyTester#test(java.lang.Object, java.lang.String, java.lang.Object[], java.lang.Object)
     */
    public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {
        if (receiver instanceof IFile) {
            if ("isWebRunnable".equals(property)) { //$NON-NLS-1$
                boolean value = true;
                if (expectedValue != null && expectedValue instanceof Boolean) {
                    value = ((Boolean) expectedValue).booleanValue();
                }
                String ext = ((IFile) receiver).getFileExtension();
                if (ext != null && ext.length() > 0) {
                    return extensions.contains(ext) == value;
                }
            }
        }
        return false;
    }

    private void loadExtensions() {
        IPreferenceStore store = CoreUIPlugin.getDefault().getPreferenceStore();
        String[] files = store.getString(IPreferenceConstants.PREF_FILE_EXPLORER_WEB_FILES).split(";"); //$NON-NLS-1$

        extensions = new HashSet<String>();
        for (int i = 0; i < files.length; ++i) {
            String ext = files[i];
            int index = ext.lastIndexOf('.');
            if (index >= 0) {
                ext = ext.substring(index + 1);
            }
            extensions.add(ext);
        }
    }

}