/*******************************************************************************
* 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.eclipse.ui.internal;
import java.text.Collator;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.ContributionItem;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IContributionItem;
import org.eclipse.jface.action.IMenuListener;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.activities.WorkbenchActivityHelper;
import org.eclipse.ui.handlers.ShowViewHandler;
import org.eclipse.ui.internal.intro.IIntroConstants;
import org.eclipse.ui.views.IViewDescriptor;
import org.eclipse.ui.views.IViewRegistry;
/**
* A <code>ShowViewMenu</code> is used to populate a menu manager with Show
* View actions. The visible views are determined by user preference from the
* Perspective Customize dialog.
*/
public class ShowViewMenu extends ContributionItem {
private IWorkbenchWindow window;
private static final String NO_TARGETS_MSG = WorkbenchMessages.Workbench_showInNoTargets;
private Comparator actionComparator = new Comparator() {
public int compare(Object o1, Object o2) {
if (collator == null)
collator = Collator.getInstance();
IAction a1 = (IAction) o1;
IAction a2 = (IAction) o2;
return collator.compare(a1.getText(), a2.getText());
}
};
private Action showDlgAction;
private Map actions = new HashMap(21);
// Maps pages to a list of opened views
private Map openedViews = new HashMap();
protected boolean dirty = true;
private IMenuListener menuListener = new IMenuListener() {
public void menuAboutToShow(IMenuManager manager) {
manager.markDirty();
dirty = true;
}
};
protected static Collator collator;
private boolean makeFast;
/**
* Creates a Show View menu.
*
* @param window
* the window containing the menu
* @param id
* the id
*/
public ShowViewMenu(IWorkbenchWindow window, String id) {
this(window, id, false);
}
/**
* Creates a Show View menu.
*
* @param window
* the window containing the menu
* @param id
* the id
*/
public ShowViewMenu(IWorkbenchWindow window, String id, final boolean makeFast) {
super(id);
this.window = window;
showDlgAction = new Action(WorkbenchMessages.ShowView_title) {
final ShowViewHandler handler = new ShowViewHandler(makeFast);
public void run() {
try {
handler.execute(new ExecutionEvent());
} catch (final ExecutionException e) {
// Do nothing.
}
}
};
window.getWorkbench().getHelpSystem().setHelp(showDlgAction,
IWorkbenchHelpContextIds.SHOW_VIEW_OTHER_ACTION);
// indicate that a show views submenu has been created
((WorkbenchWindow) window)
.addSubmenu(WorkbenchWindow.SHOW_VIEW_SUBMENU);
showDlgAction.setActionDefinitionId("org.eclipse.ui.views.showView"); //$NON-NLS-1$
this.makeFast = makeFast;
}
public boolean isDirty() {
return dirty;
}
/**
* Overridden to always return true and force dynamic menu building.
*/
public boolean isDynamic() {
return true;
}
/**
* Fills the menu with Show View actions.
*/
private void fillMenu(IMenuManager innerMgr) {
// Remove all.
innerMgr.removeAll();
// If no page disable all.
IWorkbenchPage page = window.getActivePage();
if (page == null)
return;
// If no active perspective disable all
if (page.getPerspective() == null)
return;
// Get visible actions.
List viewIds = Arrays.asList(page.getShowViewShortcuts());
// add all open views
viewIds = addOpenedViews(page, viewIds);
List actions = new ArrayList(viewIds.size());
for (Iterator i = viewIds.iterator(); i.hasNext();) {
String id = (String) i.next();
if (id.equals(IIntroConstants.INTRO_VIEW_ID))
continue;
IAction action = getAction(id);
if (action != null) {
if (WorkbenchActivityHelper.filterItem(action))
continue;
actions.add(action);
}
}
Collections.sort(actions, actionComparator);
for (Iterator i = actions.iterator(); i.hasNext();) {
innerMgr.add((IAction) i.next());
}
// Add Other ..
innerMgr.add(new Separator());
innerMgr.add(showDlgAction);
}
private List addOpenedViews(IWorkbenchPage page, List actions) {
ArrayList views = getParts(page);
ArrayList result = new ArrayList(views.size() + actions.size());
for (int i = 0; i < actions.size(); i++) {
Object element = actions.get(i);
if (result.indexOf(element) < 0)
result.add(element);
}
for (int i = 0; i < views.size(); i++) {
Object element = views.get(i);
if (result.indexOf(element) < 0)
result.add(element);
}
return result;
}
/**
* Returns the action for the given view id, or null if not found.
*/
private IAction getAction(String id) {
// Keep a cache, rather than creating a new action each time,
// so that image caching in ActionContributionItem works.
IAction action = (IAction) actions.get(id);
if (action == null) {
IViewRegistry reg = WorkbenchPlugin.getDefault().getViewRegistry();
IViewDescriptor desc = reg.find(id);
if (desc != null) {
action = new ShowViewAction(window, desc, makeFast);
action.setActionDefinitionId(id);
actions.put(id, action);
}
}
return action;
}
private ArrayList getParts(IWorkbenchPage page) {
ArrayList parts = (ArrayList) openedViews.get(page);
if (parts == null) {
parts = new ArrayList();
openedViews.put(page, parts);
}
return parts;
}
public void fill(Menu menu, int index) {
if (getParent() instanceof MenuManager)
((MenuManager) getParent()).addMenuListener(menuListener);
if (!dirty)
return;
MenuManager manager = new MenuManager();
fillMenu(manager);
IContributionItem items[] = manager.getItems();
if (items.length == 0) {
MenuItem item = new MenuItem(menu, SWT.NONE, index++);
item.setText(NO_TARGETS_MSG);
item.setEnabled(false);
} else {
for (int i = 0; i < items.length; i++) {
items[i].fill(menu, index++);
}
}
dirty = false;
}
// for dynamic UI
protected void removeAction(String viewId) {
actions.remove(viewId);
}
}
