com.google.dart.tools.ui.omni.elements.PreferenceElement.java Source code

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Here is the source code for com.google.dart.tools.ui.omni.elements.PreferenceElement.java

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/*
 * Copyright (c) 2011, the Dart project authors.
 * 
 * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.dart.tools.ui.omni.elements;

import com.google.dart.tools.ui.omni.OmniElement;

import org.eclipse.jface.preference.IPreferenceNode;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.internal.dialogs.WorkbenchPreferenceDialog;

/**
 * Element for preference nodes.
 */
@SuppressWarnings("restriction")
public class PreferenceElement extends OmniElement {

    private final IPreferenceNode preferenceNode;

    private final String prefix;

    /* package */ PreferenceElement(IPreferenceNode preferenceNode, String prefix,
            PreferenceProvider preferenceProvider) {
        super(preferenceProvider);
        this.preferenceNode = preferenceNode;
        this.prefix = prefix;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final PreferenceElement other = (PreferenceElement) obj;
        if (preferenceNode == null) {
            if (other.preferenceNode != null) {
                return false;
            }
        } else if (!preferenceNode.equals(other.preferenceNode)) {
            return false;
        }
        return true;
    }

    @Override
    public void execute(String text) {
        IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
        if (window != null) {
            WorkbenchPreferenceDialog dialog = WorkbenchPreferenceDialog.createDialogOn(window.getShell(),
                    preferenceNode.getId());
            dialog.open();
        }
    }

    @Override
    public String getId() {
        return preferenceNode.getId();
    }

    @Override
    public ImageDescriptor getImageDescriptor() {
        Image image = preferenceNode.getLabelImage();
        if (image != null) {
            ImageDescriptor descriptor = ImageDescriptor.createFromImage(image);
            return descriptor;
        }
        return null;
    }

    @Override
    public String getLabel() {
        if (prefix != null && prefix.length() > 0) {
            return preferenceNode.getLabelText() + separator + prefix;
        }
        return preferenceNode.getLabelText();
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((preferenceNode == null) ? 0 : preferenceNode.hashCode());
        return result;
    }
}