/*******************************************************************************
 * Copyright (c) 2000, 2006 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
 *******************************************************************************/
package org.eclipse.debug.internal.ui.actions.breakpoints;

import org.eclipse.debug.core.model.IBreakpoint;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.debug.internal.ui.DelegatingModelPresentation;
import org.eclipse.debug.internal.ui.IDebugHelpContextIds;
import org.eclipse.debug.internal.ui.actions.ActionMessages;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.SelectionProviderAction;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.plugin.AbstractUIPlugin;

public class OpenBreakpointMarkerAction extends SelectionProviderAction {

	protected static DelegatingModelPresentation fgPresentation = new DelegatingModelPresentation();
	private IBreakpoint breakpoint;
	private IEditorInput input;
	
	public OpenBreakpointMarkerAction(ISelectionProvider selectionProvider) {
		super(selectionProvider, ActionMessages.OpenBreakpointMarkerAction__Go_to_File_1); 
		setToolTipText(ActionMessages.OpenBreakpointMarkerAction_Go_to_File_for_Breakpoint_2); 
		setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin("org.eclipse.ui.ide", "icons/full/elcl16/gotoobj_tsk.gif")); //$NON-NLS-1$ //$NON-NLS-2$
		setDisabledImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin("org.eclipse.ui.ide", "icons/full/dlcl16/gotoobj_tsk.gif")); //$NON-NLS-1$ //$NON-NLS-2$
		PlatformUI.getWorkbench().getHelpSystem().setHelp(
			this,
			IDebugHelpContextIds.OPEN_BREAKPOINT_ACTION);
		setEnabled(false);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.action.IAction#run()
	 */
	public void run() {
		IWorkbenchWindow dwindow= DebugUIPlugin.getActiveWorkbenchWindow();
		if (dwindow == null) {
			return;
		}
		IWorkbenchPage page= dwindow.getActivePage();
		if (page == null) {
			return;
		}
		
		IStructuredSelection selection= getStructuredSelection();
		if (selection.isEmpty()) {
			setEnabled(false);
			return;
		}
		
		IEditorPart part= null;
		if (input != null) {
			String editorId = fgPresentation.getEditorId(input, breakpoint);
            if (editorId != null) {
    			try {
    				part= page.openEditor(input, editorId);
    			} catch (PartInitException e) {
    				DebugUIPlugin.errorDialog(dwindow.getShell(), ActionMessages.OpenBreakpointMarkerAction_Go_to_Breakpoint_1, ActionMessages.OpenBreakpointMarkerAction_Exceptions_occurred_attempting_to_open_the_editor_for_the_breakpoint_resource_2, e); // 
    			}
            }
		}
		if (part != null) {
			part.setFocus();
			IDE.gotoMarker(part, breakpoint.getMarker());
		}
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.ui.actions.SelectionProviderAction#selectionChanged(org.eclipse.jface.viewers.IStructuredSelection)
	 */
	public void selectionChanged(IStructuredSelection sel) {
		if (sel.size() == 1) {
			Object element = sel.getFirstElement();
			if (element instanceof IBreakpoint) {
				breakpoint= (IBreakpoint) element;
				input= fgPresentation.getEditorInput(breakpoint);
				if (input != null) {
					setEnabled(true);
					return;
				}
			}
		} else {
			breakpoint = null;
			input = null;
		}
		setEnabled(false);
	}
}