/*******************************************************************************
* Copyright (c) 2004, 2010 QNX Software Systems 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:
* QNX Software Systems - Initial API and implementation
* Nokia - adapt to new command framework
*******************************************************************************/
package org.eclipse.cdt.debug.internal.ui.actions;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.eclipse.cdt.debug.core.model.ICastToType;
import org.eclipse.cdt.debug.internal.ui.CDebugImages;
import org.eclipse.cdt.debug.ui.CDebugUIPlugin;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.ui.IDebugView;
import org.eclipse.jface.dialogs.IInputValidator;
import org.eclipse.jface.dialogs.InputDialog;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.custom.BusyIndicator;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.ISources;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.handlers.HandlerUtil;
/**
* The delegate of the "Cast To Type" action.
*/
public class CastToTypeActionHandler extends AbstractHandler {
static protected class CastToTypeInputValidator implements IInputValidator {
public CastToTypeInputValidator() {
}
public String isValid( String newText ) {
if ( newText.trim().length() == 0 ) {
return ActionMessages.getString( "CastToTypeActionDelegate.0" ); //$NON-NLS-1$
}
return null;
}
}
protected class CastToTypeDialog extends InputDialog {
public CastToTypeDialog( Shell parentShell, String initialValue ) {
super( parentShell, ActionMessages.getString( "CastToTypeActionDelegate.1" ), //$NON-NLS-1$
ActionMessages.getString( "CastToTypeActionDelegate.2" ), //$NON-NLS-1$
initialValue,
new CastToTypeInputValidator() );
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.window.Window#configureShell(org.eclipse.swt.widgets.Shell)
*/
protected void configureShell( Shell shell ) {
super.configureShell( shell );
shell.setImage( CDebugImages.get( CDebugImages.IMG_LCL_CAST_TO_TYPE ) );
}
}
private ICastToType[] fCastableItems = new ICastToType[0];
private IStatus fStatus = null;
private IWorkbenchPart fTargetPart;
public CastToTypeActionHandler() {
super();
}
public Object execute(ExecutionEvent event) throws ExecutionException {
fTargetPart = HandlerUtil.getActivePartChecked(event);
if ( getCastToType() == null || getCastToType().length == 0 )
return null;
BusyIndicator.showWhile( Display.getCurrent(), new Runnable() {
public void run() {
try {
doAction( getCastToType() );
setStatus( null );
}
catch( DebugException e ) {
setStatus( e.getStatus() );
}
}
} );
if ( getStatus() != null && !getStatus().isOK() ) {
IWorkbenchWindow window = CDebugUIPlugin.getActiveWorkbenchWindow();
if ( window != null ) {
CDebugUIPlugin.errorDialog( ActionMessages.getString( "CastToTypeActionDelegate.3" ), getStatus() ); //$NON-NLS-1$
}
else {
CDebugUIPlugin.log( getStatus() );
}
}
return null;
}
@Override
public void setEnabled(Object evaluationContext) {
ICastToType[] castableItems = getCastToType(evaluationContext);
setBaseEnabled(castableItems.length > 0);
setCastToType(castableItems);
}
private ICastToType[] getCastToType(Object evaluationContext) {
List<ICastToType> castableItems = new ArrayList<ICastToType>();
if (evaluationContext instanceof IEvaluationContext) {
Object s = ((IEvaluationContext) evaluationContext).getVariable(ISources.ACTIVE_MENU_SELECTION_NAME);
if (s instanceof IStructuredSelection) {
Iterator<?> iter = ((IStructuredSelection)s).iterator();
while(iter.hasNext()) {
Object element = DebugPlugin.getAdapter(iter.next(), ICastToType.class);
if (element instanceof ICastToType) {
if (((ICastToType)element).canCast()) {
castableItems.add((ICastToType)element);
}
}
}
}
}
return castableItems.toArray(new ICastToType[castableItems.size()]);
}
protected ICastToType[] getCastToType() {
return fCastableItems;
}
protected void setCastToType( ICastToType[] castableItems ) {
fCastableItems = castableItems;
}
public IStatus getStatus() {
return fStatus;
}
public void setStatus( IStatus status ) {
fStatus = status;
}
protected void doAction( ICastToType[] castableItems ) throws DebugException {
String currentType = castableItems[0].getCurrentType().trim();
CastToTypeDialog dialog = new CastToTypeDialog( CDebugUIPlugin.getActiveWorkbenchShell(), currentType );
if ( dialog.open() == Window.OK ) {
String newType = dialog.getValue().trim();
for ( ICastToType castableItem : castableItems ) {
castableItem.cast( newType );
}
if ( getSelectionProvider() != null )
getSelectionProvider().setSelection( new StructuredSelection( castableItems ) );
}
}
private ISelectionProvider getSelectionProvider() {
return (fTargetPart instanceof IDebugView) ? ((IDebugView)fTargetPart).getViewer() : null;
}
}