net.certiv.fluentmark.preferences.PreferencesAdapter.java Source code

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Here is the source code for net.certiv.fluentmark.preferences.PreferencesAdapter.java

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/*******************************************************************************
 * Copyright (c) 2016 - 2017 Certiv Analytics and others.
 * 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
 ******************************************************************************/
package net.certiv.fluentmark.preferences;

import org.eclipse.core.runtime.ListenerList;
import org.eclipse.core.runtime.Preferences;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;

/**
 * Adapts {@link org.eclipse.core.runtime.Preferences} to
 * {@link org.eclipse.jface.preference.IPreferenceStore}
 *
 * @since 3.0
 */
@SuppressWarnings("deprecation")
public class PreferencesAdapter implements IPreferenceStore {

    /**
     * Property change listener. Listens for events of type
     * {@link org.eclipse.core.runtime.Preferences.PropertyChangeEvent} and fires a
     * {@link org.eclipse.jface.util.PropertyChangeEvent} on the adapter with arguments from the
     * received event.
     */
    private class PropertyChangeListener implements Preferences.IPropertyChangeListener {

        @Override
        public void propertyChange(Preferences.PropertyChangeEvent event) {
            firePropertyChangeEvent(event.getProperty(), event.getOldValue(), event.getNewValue());
        }
    }

    /** Listeners on the adapter */
    private ListenerList<IPropertyChangeListener> fListeners = new ListenerList<>(ListenerList.IDENTITY);

    /** Listener on the adapted OpenStylesheetsHandler */
    private PropertyChangeListener fListener = new PropertyChangeListener();

    /** Adapted OpenStylesheetsHandler */
    private Preferences fPreferences;

    /** True iff no events should be forwarded */
    private boolean fSilent;

    /**
     * Initialize with empty OpenStylesheetsHandler.
     */
    public PreferencesAdapter() {
        this(new Preferences());
    }

    /**
     * Initialize with the given OpenStylesheetsHandler.
     *
     * @param preferences The preferences to wrap.
     */
    public PreferencesAdapter(Preferences preferences) {
        fPreferences = preferences;
    }

    @Override
    public void addPropertyChangeListener(IPropertyChangeListener listener) {
        if (fListeners.size() == 0)
            fPreferences.addPropertyChangeListener(fListener);
        fListeners.add(listener);
    }

    @Override
    public void removePropertyChangeListener(IPropertyChangeListener listener) {
        fListeners.remove(listener);
        if (fListeners.size() == 0)
            fPreferences.removePropertyChangeListener(fListener);
    }

    @Override
    public boolean contains(String name) {
        return fPreferences.contains(name);
    }

    @Override
    public void firePropertyChangeEvent(String name, Object oldValue, Object newValue) {
        if (!fSilent) {
            final PropertyChangeEvent event = new PropertyChangeEvent(this, name, oldValue, newValue);
            for (final IPropertyChangeListener listener : fListeners) {
                Runnable runnable = new Runnable() {

                    @Override
                    public void run() {
                        listener.propertyChange(event);
                    }
                };

                if (Display.getCurrent() != null)
                    runnable.run();
                else {
                    // Post runnable into UI thread
                    Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
                    Display display;
                    if (shell != null)
                        display = shell.getDisplay();
                    else
                        display = Display.getDefault();
                    display.asyncExec(runnable);
                }
            }
        }
    }

    @Override
    public boolean getBoolean(String name) {
        return fPreferences.getBoolean(name);
    }

    @Override
    public boolean getDefaultBoolean(String name) {
        return fPreferences.getDefaultBoolean(name);
    }

    @Override
    public double getDefaultDouble(String name) {
        return fPreferences.getDefaultDouble(name);
    }

    @Override
    public float getDefaultFloat(String name) {
        return fPreferences.getDefaultFloat(name);
    }

    @Override
    public int getDefaultInt(String name) {
        return fPreferences.getDefaultInt(name);
    }

    @Override
    public long getDefaultLong(String name) {
        return fPreferences.getDefaultLong(name);
    }

    @Override
    public String getDefaultString(String name) {
        return fPreferences.getDefaultString(name);
    }

    @Override
    public double getDouble(String name) {
        return fPreferences.getDouble(name);
    }

    @Override
    public float getFloat(String name) {
        return fPreferences.getFloat(name);
    }

    @Override
    public int getInt(String name) {
        return fPreferences.getInt(name);
    }

    @Override
    public long getLong(String name) {
        return fPreferences.getLong(name);
    }

    @Override
    public String getString(String name) {
        return fPreferences.getString(name);
    }

    @Override
    public boolean isDefault(String name) {
        return fPreferences.isDefault(name);
    }

    @Override
    public boolean needsSaving() {
        return fPreferences.needsSaving();
    }

    @Override
    public void putValue(String name, String value) {
        try {
            fSilent = true;
            fPreferences.setValue(name, value);
        } finally {
            fSilent = false;
        }
    }

    @Override
    public void setDefault(String name, double value) {
        fPreferences.setDefault(name, value);
    }

    @Override
    public void setDefault(String name, float value) {
        fPreferences.setDefault(name, value);
    }

    @Override
    public void setDefault(String name, int value) {
        fPreferences.setDefault(name, value);
    }

    @Override
    public void setDefault(String name, long value) {
        fPreferences.setDefault(name, value);
    }

    @Override
    public void setDefault(String name, String defaultObject) {
        fPreferences.setDefault(name, defaultObject);
    }

    @Override
    public void setDefault(String name, boolean value) {
        fPreferences.setDefault(name, value);
    }

    @Override
    public void setToDefault(String name) {
        fPreferences.setToDefault(name);
    }

    @Override
    public void setValue(String name, double value) {
        fPreferences.setValue(name, value);
    }

    @Override
    public void setValue(String name, float value) {
        fPreferences.setValue(name, value);
    }

    @Override
    public void setValue(String name, int value) {
        fPreferences.setValue(name, value);
    }

    @Override
    public void setValue(String name, long value) {
        fPreferences.setValue(name, value);
    }

    @Override
    public void setValue(String name, String value) {
        fPreferences.setValue(name, value);
    }

    @Override
    public void setValue(String name, boolean value) {
        fPreferences.setValue(name, value);
    }
}