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/*******************************************************************************
* 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.debug.internal.ui.views.variables;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.ILogicalStructureType;
import org.eclipse.debug.core.model.IExpression;
import org.eclipse.debug.core.model.IValue;
import org.eclipse.debug.core.model.IVariable;
import org.eclipse.debug.internal.ui.IDebugHelpContextIds;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.ActionContributionItem;
import org.eclipse.jface.action.IMenuCreator;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.ui.PlatformUI;
/**
* Drop down action that displays available logical structures for a selected
* variable or expression.
*/
public class AvailableLogicalStructuresAction extends Action implements IMenuCreator {
private VariablesView fView;
private Menu fMenu;
private IValue fValue;
private ILogicalStructureType[] fTypes;
public AvailableLogicalStructuresAction(VariablesView view) {
setView(view);
setToolTipText(VariablesViewMessages.AvailableLogicalStructuresAction_0);
setText(VariablesViewMessages.AvailableLogicalStructuresAction_1);
PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IDebugHelpContextIds.VARIABLES_SELECT_LOGICAL_STRUCTURE);
setEnabled(false);
setMenuCreator(this);
init();
}
/* (non-Javadoc)
* @see org.eclipse.jface.action.IAction#run()
*/
@Override
public void run() {
}
protected VariablesView getView() {
return fView;
}
protected void setView(VariablesView view) {
fView = view;
}
/* (non-Javadoc)
* @see org.eclipse.jface.action.IMenuCreator#dispose()
*/
@Override
public void dispose() {
if (fMenu != null) {
fMenu.dispose();
}
fView= null;
fValue = null;
fTypes = null;
}
/* (non-Javadoc)
* @see org.eclipse.jface.action.IMenuCreator#getMenu(org.eclipse.swt.widgets.Control)
*/
@Override
public Menu getMenu(Control parent) {
return null;
}
protected void addActionToMenu(Menu parent, Action action) {
ActionContributionItem item= new ActionContributionItem(action);
item.fill(parent, -1);
}
/* (non-Javadoc)
* @see org.eclipse.jface.action.IMenuCreator#getMenu(org.eclipse.swt.widgets.Menu)
*/
@Override
public Menu getMenu(Menu parent) {
if (fMenu != null) {
fMenu.dispose();
}
fMenu= new Menu(parent);
ILogicalStructureType[] types = getTypes();
ILogicalStructureType enabledType = DebugPlugin.getDefaultStructureType(types);
if (types != null && types.length > 0) {
for (int i = 0; i < types.length; i++) {
ILogicalStructureType type= types[i];
Action action = new SelectLogicalStructureAction(getView(), type, getValue(), types);
action.setChecked(enabledType == type);
StringBuffer label= new StringBuffer();
//add the numerical accelerator
if (i < 9) {
label.append('&');
label.append(i + 1);
label.append(' ');
}
label.append(action.getText());
action.setText(label.toString());
addActionToMenu(fMenu, action);
}
}
return fMenu;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent)
*/
public void init() {
setValue(null);
setTypes(null);
if (getView().isShowLogicalStructure()) {
ISelection s = getView().getViewer().getSelection();
if (s instanceof IStructuredSelection) {
IStructuredSelection selection = (IStructuredSelection) s;
if (selection.size() == 1) {
Object obj = selection.getFirstElement();
IValue value = null;
if (obj instanceof IVariable) {
IVariable var = (IVariable) obj;
try {
value = var.getValue();
} catch (DebugException e) {
}
} else if (obj instanceof IExpression) {
IExpression expression = (IExpression)obj;
value = expression.getValue();
}
if (value != null) {
ILogicalStructureType[] types = DebugPlugin.getLogicalStructureTypes(value);
if (types.length > 0) {
setTypes(types);
setValue(value);
setEnabled(true);
return;
}
}
}
}
}
setEnabled(false);
}
protected ILogicalStructureType[] getTypes() {
return fTypes;
}
private void setTypes(ILogicalStructureType[] types) {
fTypes = types;
}
protected IValue getValue() {
return fValue;
}
private void setValue(IValue value) {
fValue = value;
}
}
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