/**
 * Copyright (c) 2003-2005 Craig Setera
 * All Rights Reserved.
 * Licensed under the Eclipse Public License - v 1.0
 * For more information see http://www.eclipse.org/legal/epl-v10.html
 */
package eclipseme.ui.internal.support;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.IReusableEditor;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.part.EditorPart;

/**
 * Editor part for display of an editor window.
 * <p />
 * Copyright (c) 2003-2005 Craig Setera<br>
 * All Rights Reserved.<br>
 * Licensed under the Eclipse Public License - v 1.0<p/>
 * <br>
 * $Revision: 1.2 $
 * <br>
 * $Date: 2005/07/07 02:36:26 $
 * <br>
 * @author Craig Setera
 */
public class BrowserEditor 
	extends EditorPart
	implements IReusableEditor
{
	public static final String ID_EDITOR = "eclipseme.ui.internal.support.BrowserEditor";
	
	private Browser browser;
	private boolean loaded;
	
	/**
	 * Construct a new editor. 
	 */
	public BrowserEditor() {
		super();
	}

	/**
	 * @see org.eclipse.ui.ISaveablePart#doSave(org.eclipse.core.runtime.IProgressMonitor)
	 */
	public void doSave(IProgressMonitor monitor) {
	}

	/**
	 * @see org.eclipse.ui.ISaveablePart#doSaveAs()
	 */
	public void doSaveAs() {
	}

	/**
	 * @see org.eclipse.ui.IEditorPart#init(org.eclipse.ui.IEditorSite, org.eclipse.ui.IEditorInput)
	 */
	public void init(IEditorSite site, IEditorInput input)
		throws PartInitException 
	{
		setSite(site);
		setInput(input);
	}

	/**
	 * @see org.eclipse.ui.ISaveablePart#isDirty()
	 */
	public boolean isDirty() {
		return false;
	}

	/**
	 * @see org.eclipse.ui.ISaveablePart#isSaveAsAllowed()
	 */
	public boolean isSaveAsAllowed() {
		return false;
	}

	/**
	 * @see org.eclipse.ui.IWorkbenchPart#createPartControl(org.eclipse.swt.widgets.Composite)
	 */
	public void createPartControl(Composite parent) {
		browser = new Browser(parent, SWT.NONE);
	}

	/**
	 * @see org.eclipse.ui.IWorkbenchPart#setFocus()
	 */
	public void setFocus() {
		if (browser != null) {
			browser.setFocus();
		}
		
		loadUrl();
	}
	
	/**
	 * @see org.eclipse.ui.part.EditorPart#setInput(org.eclipse.ui.IEditorInput)
	 */
	public void setInput(IEditorInput input)
	{
		super.setInput(input);
		loaded = false;
		loadUrl();
	}
	
	/**
	 * Load the current editor input url.
	 */
	private void loadUrl() {
		IEditorInput input = getEditorInput();
		
		if (!loaded && (browser != null) && (input instanceof URLEditorInput)) {
			String url = ((URLEditorInput) input).getUrl();
			browser.setUrl(url);
			browser.refresh();
			loaded = true;
		}
	}
}