/*******************************************************************************
* Copyright (c) 2000, 2005 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.erlide.ui.actions;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.ui.actions.ActionGroup;
import org.eclipse.ui.actions.OpenWithMenu;
import org.erlide.ui.editors.erl.IErlangEditorActionDefinitionIds;
import org.erlide.ui.util.IContextMenuConstants;
/**
* Action group that adds the actions opening a new editor to the context menu
* and the action bar's navigate menu.
*
* <p>
* This class may be instantiated; it is not intended to be subclassed.
* </p>
*
* @since 2.0
*/
public class OpenEditorActionGroup extends ActionGroup {
private final IWorkbenchSite fSite;
private boolean fIsEditorOwner;
private final OpenAction fOpen;
/**
* Creates a new <code>OpenActionGroup</code>. The group requires that the
* selection provided by the part's selection provider is of type <code>
* org.eclipse.jface.viewers.IStructuredSelection</code> .
*
* @param part
* the view part that owns this action group
*/
public OpenEditorActionGroup(final IViewPart part) {
fSite = part.getSite();
fOpen = new OpenAction(fSite);
fOpen.setActionDefinitionId(IErlangEditorActionDefinitionIds.OPEN_EDITOR);
initialize(fSite.getSelectionProvider());
}
/**
* Returns the open action managed by this action group.
*
* @return the open action. Returns <code>null</code> if the group doesn't
* provide any open action
*/
public IAction getOpenAction() {
return fOpen;
}
private void initialize(final ISelectionProvider provider) {
final ISelection selection = provider.getSelection();
fOpen.update(selection);
if (!fIsEditorOwner) {
provider.addSelectionChangedListener(fOpen);
}
}
@Override
public void fillActionBars(final IActionBars actionBar) {
super.fillActionBars(actionBar);
setGlobalActionHandlers(actionBar);
}
@Override
public void fillContextMenu(final IMenuManager menu) {
super.fillContextMenu(menu);
appendToGroup(menu, fOpen);
if (!fIsEditorOwner) {
addOpenWithMenu(menu);
}
}
/*
* @see ActionGroup#dispose()
*/
@Override
public void dispose() {
final ISelectionProvider provider = fSite.getSelectionProvider();
provider.removeSelectionChangedListener(fOpen);
super.dispose();
}
private void setGlobalActionHandlers(final IActionBars actionBars) {
actionBars.setGlobalActionHandler(IErlangEditorActionDefinitionIds.OPEN_EDITOR,
fOpen);
}
private void appendToGroup(final IMenuManager menu, final IAction action) {
if (action.isEnabled()) {
menu.appendToGroup(IContextMenuConstants.GROUP_OPEN, action);
}
}
private void addOpenWithMenu(final IMenuManager menu) {
final ISelection selection = getContext().getSelection();
if (selection.isEmpty() || !(selection instanceof IStructuredSelection)) {
return;
}
final IStructuredSelection ss = (IStructuredSelection) selection;
if (ss.size() != 1) {
return;
}
final Object o = ss.getFirstElement();
if (!(o instanceof IAdaptable)) {
return;
}
final IAdaptable element = (IAdaptable) o;
final Object resource = element.getAdapter(IResource.class);
if (!(resource instanceof IFile)) {
return;
}
// Create a menu.
final IMenuManager submenu = new MenuManager(ActionMessages.OpenWithMenu_label);
submenu.add(new OpenWithMenu(fSite.getPage(), (IFile) resource));
// Add the submenu.
menu.appendToGroup(IContextMenuConstants.GROUP_OPEN, submenu);
}
}