/*
 * Copyright (c) 2010, Michael Grossmann
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package org.jowidgets.spi.impl.swt.common.widgets;

import org.eclipse.swt.widgets.MenuItem;
import org.jowidgets.common.image.IImageConstant;
import org.jowidgets.common.types.Accelerator;
import org.jowidgets.spi.impl.controller.ActionObservable;
import org.jowidgets.spi.impl.swt.common.image.SwtImageRegistry;
import org.jowidgets.spi.impl.swt.common.util.AcceleratorConvert;
import org.jowidgets.spi.widgets.IMenuItemSpi;

public class MenuItemImpl extends ActionObservable implements IMenuItemSpi, IToolTipTextProvider {

    private final MenuItem menuItem;
    private final SwtImageRegistry imageRegistry;

    private String text;
    private String tooltipText;
    private String acceleratorText;
    private Character mnemonic;

    public MenuItemImpl(final MenuItem menuItem, final SwtImageRegistry imageRegistry) {
        this.menuItem = menuItem;
        this.imageRegistry = imageRegistry;
    }

    @Override
    public MenuItem getUiReference() {
        return menuItem;
    }

    @Override
    public void setIcon(final IImageConstant icon) {
        menuItem.setImage(imageRegistry.getImage(icon));
    }

    @Override
    public void setText(final String text) {
        this.text = text;
        setCombinedText();
    }

    @Override
    public void setToolTipText(final String tooltipText) {
        this.tooltipText = tooltipText;
    }

    @Override
    public String getToolTipText() {
        return tooltipText;
    }

    public void setAccelerator(final Accelerator accelerator) {
        try {
            getUiReference().setAccelerator(AcceleratorConvert.convert(accelerator));
        }
        catch (final NoSuchMethodError error) {
            //RWT does not support accelerators
            return;
        }
        this.acceleratorText = AcceleratorConvert.acceleratorText(accelerator);
        setCombinedText();

    }

    @Override
    public void setMnemonic(final char mnemonic) {
        this.mnemonic = Character.valueOf(mnemonic);
        setCombinedText();
    }

    @Override
    public void setEnabled(final boolean enabled) {
        menuItem.setEnabled(enabled);
    }

    @Override
    public boolean isEnabled() {
        return menuItem.isEnabled();
    }

    private void setCombinedText() {
        final StringBuilder combiened = new StringBuilder();
        if (text != null) {
            combiened.append(text.replace("&", "&&"));
        }
        if (mnemonic != null) {
            final int index = combiened.indexOf(mnemonic.toString());
            if (index != -1) {
                combiened.insert(index, '&');
            }
        }
        if (acceleratorText != null) {
            combiened.append('\t');
            combiened.append(acceleratorText);
        }
        menuItem.setText(combiened.toString());
    }

}