/*******************************************************************************
 * Copyright (c) 2001, 2004 IBM Corporation 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
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Jens Lukowski/Innoopract - initial renaming/restructuring
 *     
 *******************************************************************************/
package org.eclipse.wst.sse.ui.edit.util;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuCreator;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.swt.events.HelpListener;
import org.eclipse.swt.widgets.Event;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.ui.texteditor.ITextEditor;

public class ActiveEditorActionHandler implements IAction {

	private String fActionId;
	private IWorkbenchSite fSite;
	private IAction fTargetAction;

	public ActiveEditorActionHandler(IWorkbenchSite site, String id) {
		super();
		fActionId = id;
		fSite = site;
	}

	/**
	 * @see org.eclipse.jface.action.IAction#addPropertyChangeListener(org.eclipse.jface.util.IPropertyChangeListener)
	 */
	public void addPropertyChangeListener(IPropertyChangeListener listener) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getAccelerator()
	 */
	public int getAccelerator() {
		updateTargetAction();
		return (fTargetAction != null ? fTargetAction.getAccelerator() : 0);
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getActionDefinitionId()
	 */
	public String getActionDefinitionId() {
		updateTargetAction();
		return (fTargetAction != null ? fTargetAction.getActionDefinitionId() : null);
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getDescription()
	 */
	public String getDescription() {
		updateTargetAction();
		return (fTargetAction != null ? fTargetAction.getDescription() : null);
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getDisabledImageDescriptor()
	 */
	public ImageDescriptor getDisabledImageDescriptor() {
		updateTargetAction();
		return (fTargetAction != null ? fTargetAction.getDisabledImageDescriptor() : null);
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getHelpListener()
	 */
	public HelpListener getHelpListener() {
		updateTargetAction();
		return (fTargetAction != null ? fTargetAction.getHelpListener() : null);
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getHoverImageDescriptor()
	 */
	public ImageDescriptor getHoverImageDescriptor() {
		updateTargetAction();
		return (fTargetAction != null ? fTargetAction.getHoverImageDescriptor() : null);
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getId()
	 */
	public String getId() {
		return getClass().getName() + hashCode();
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getImageDescriptor()
	 */
	public ImageDescriptor getImageDescriptor() {
		updateTargetAction();
		return (fTargetAction != null ? fTargetAction.getImageDescriptor() : null);
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getMenuCreator()
	 */
	public IMenuCreator getMenuCreator() {
		return null;
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getStyle()
	 */
	public int getStyle() {
		return IAction.AS_PUSH_BUTTON;
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getText()
	 */
	public String getText() {
		updateTargetAction();
		return (fTargetAction != null ? fTargetAction.getText() : null);
	}

	/**
	 * @see org.eclipse.jface.action.IAction#getToolTipText()
	 */
	public String getToolTipText() {
		updateTargetAction();
		return (fTargetAction != null ? fTargetAction.getToolTipText() : null);
	}

	/**
	 * @see org.eclipse.jface.action.IAction#isChecked()
	 */
	public boolean isChecked() {
		updateTargetAction();
		return (fTargetAction != null ? fTargetAction.isChecked() : true);
	}

	/**
	 * @see org.eclipse.jface.action.IAction#isEnabled()
	 */
	public boolean isEnabled() {
		updateTargetAction();
		return (fTargetAction != null ? fTargetAction.isEnabled() : false);
	}

	/**
	 * @see org.eclipse.jface.action.IAction#removePropertyChangeListener(org.eclipse.jface.util.IPropertyChangeListener)
	 */
	public void removePropertyChangeListener(IPropertyChangeListener listener) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#run()
	 */
	public void run() {
		updateTargetAction();
		if (fTargetAction != null)
			fTargetAction.run();
	}

	/**
	 * @see org.eclipse.jface.action.IAction#runWithEvent(org.eclipse.swt.widgets.Event)
	 */
	public void runWithEvent(Event event) {
		updateTargetAction();
		if (fTargetAction != null)
			fTargetAction.runWithEvent(event);
	}

	/**
	 * NOT SUPPORTED
	 * 
	 * @see org.eclipse.jface.action.IAction#setAccelerator(int)
	 */
	public void setAccelerator(int keycode) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setActionDefinitionId(java.lang.String)
	 */
	public void setActionDefinitionId(String id) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setChecked(boolean)
	 */
	public void setChecked(boolean checked) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setDescription(java.lang.String)
	 */
	public void setDescription(String text) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setDisabledImageDescriptor(org.eclipse.jface.resource.ImageDescriptor)
	 */
	public void setDisabledImageDescriptor(ImageDescriptor newImage) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setEnabled(boolean)
	 */
	public void setEnabled(boolean enabled) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setHelpListener(org.eclipse.swt.events.HelpListener)
	 */
	public void setHelpListener(HelpListener listener) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setHoverImageDescriptor(org.eclipse.jface.resource.ImageDescriptor)
	 */
	public void setHoverImageDescriptor(ImageDescriptor newImage) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setId(java.lang.String)
	 */
	public void setId(String id) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setImageDescriptor(org.eclipse.jface.resource.ImageDescriptor)
	 */
	public void setImageDescriptor(ImageDescriptor newImage) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setMenuCreator(org.eclipse.jface.action.IMenuCreator)
	 */
	public void setMenuCreator(IMenuCreator creator) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setText(java.lang.String)
	 */
	public void setText(String text) {
	}

	/**
	 * @see org.eclipse.jface.action.IAction#setToolTipText(java.lang.String)
	 */
	public void setToolTipText(String text) {
	}

	private void updateTargetAction() {
		if (fSite != null && fSite.getWorkbenchWindow() != null && fSite.getWorkbenchWindow().getActivePage() != null) {
			IEditorPart part = fSite.getWorkbenchWindow().getActivePage().getActiveEditor();
			ITextEditor editor = null;
			if (part instanceof ITextEditor)
				editor = (ITextEditor) part;
			else
				editor = (ITextEditor) (part != null ? part.getAdapter(ITextEditor.class) : null);
			if (editor != null) {
				fTargetAction = editor.getAction(fActionId);
			} else {
				fTargetAction = null;
			}
		} else
			fTargetAction = null;
	}
}