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/*******************************************************************************
* Copyright (c) 2007, 2016 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Friederike Schertel <friederike@schertel.org> - Bug 478336
******************************************************************************/
package org.eclipse.ui.internal;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.expressions.EvaluationResult;
import org.eclipse.core.expressions.Expression;
import org.eclipse.core.expressions.ExpressionInfo;
import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.e4.ui.model.application.ui.menu.MMenu;
import org.eclipse.e4.ui.workbench.IPresentationEngine;
import org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.swt.widgets.ToolItem;
import org.eclipse.ui.ISources;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchPartSite;
import org.eclipse.ui.handlers.HandlerUtil;
/**
* Shows the View Menu
* <p>
* Replacement for: ShowViewMenuAction
* </p>
*
* @since 3.3
*
*/
public class ShowViewMenuHandler extends AbstractEvaluationHandler {
private Expression enabledWhen;
public ShowViewMenuHandler() {
registerEnablement();
}
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
IWorkbenchPart part = HandlerUtil.getActivePart(event);
if (part != null) {
IWorkbenchPartSite site = part.getSite();
if (site instanceof PartSite) {
final MPart model = ((PartSite) site).getModel();
Composite partContainer = (Composite) model.getWidget();
if (partContainer != null) {
Composite parent = partContainer.getParent();
while (parent != null) {
if (parent instanceof CTabFolder) {
CTabFolder ctf = (CTabFolder) parent;
final Control topRight = ctf.getTopRight();
if (topRight instanceof Composite) {
for (Control child : ((Composite) topRight).getChildren()) {
if (child instanceof ToolBar && "ViewMenu".equals(child.getData())) { //$NON-NLS-1$
ToolBar tb = (ToolBar) child;
ToolItem ti = tb.getItem(0);
Event sevent = new Event();
sevent.type = SWT.Selection;
sevent.widget = ti;
ti.notifyListeners(SWT.Selection, sevent);
}
}
}
return null;
}
parent = parent.getParent();
}
MMenu menuModel = StackRenderer.getViewMenu(model);
if (menuModel != null) {
showStandaloneViewMenu(event, model, menuModel, partContainer);
}
}
}
}
return null;
}
private void showStandaloneViewMenu(ExecutionEvent event, MPart model, MMenu menuModel, Composite partContainer) {
Shell shell = partContainer.getShell();
Menu menu = (Menu) menuModel.getWidget();
if (menu == null) {
IPresentationEngine engine = (IPresentationEngine) HandlerUtil.getVariable(event,
IPresentationEngine.class.getName());
menu = (Menu) engine.createGui(menuModel, shell, model.getContext());
if (menu != null) {
final Menu tmpMenu = menu;
partContainer.addDisposeListener(e -> tmpMenu.dispose());
}
}
Display display = menu.getDisplay();
Point location = display.map(partContainer, null, partContainer.getLocation());
Point size = partContainer.getSize();
menu.setLocation(location.x + size.x, location.y);
menu.setVisible(true);
while (!menu.isDisposed() && menu.isVisible()) {
if (!display.readAndDispatch())
display.sleep();
}
if (!(menu.getData() instanceof MenuManager)) {
menu.dispose();
}
}
@Override
protected Expression getEnabledWhenExpression() {
if (enabledWhen == null) {
enabledWhen = new Expression() {
@Override
public EvaluationResult evaluate(IEvaluationContext context) throws CoreException {
// IWorkbenchPart part = InternalHandlerUtil
// .getActivePart(context);
// if (part != null) {
// PartPane pane = ((PartSite) part.getSite()).getPane();
// if ((pane instanceof ViewPane)
// && ((ViewPane) pane).hasViewMenu()) {
return EvaluationResult.TRUE;
// }
// }
// return EvaluationResult.FALSE;
}
@Override
public void collectExpressionInfo(ExpressionInfo info) {
info.addVariableNameAccess(ISources.ACTIVE_PART_NAME);
}
};
}
return enabledWhen;
}
}
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