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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.expression;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.ILaunch;
import org.eclipse.debug.core.model.IDebugElement;
import org.eclipse.debug.core.model.IErrorReportingExpression;
import org.eclipse.debug.core.model.IExpression;
import org.eclipse.debug.core.model.IWatchExpression;
import org.eclipse.debug.internal.ui.IDebugHelpContextIds;
import org.eclipse.debug.internal.ui.preferences.IDebugPreferenceConstants;
import org.eclipse.debug.internal.ui.views.AbstractDebugEventHandler;
import org.eclipse.debug.internal.ui.views.DebugViewInterimLabelProvider;
import org.eclipse.debug.internal.ui.views.DebugViewLabelDecorator;
import org.eclipse.debug.internal.ui.views.RemoteTreeViewer;
import org.eclipse.debug.internal.ui.views.variables.VariablesView;
import org.eclipse.debug.internal.ui.views.variables.VariablesViewMessages;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.viewers.IBaseLabelProvider;
import org.eclipse.jface.viewers.IContentProvider;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.IWorkbenchActionConstants;
import org.eclipse.ui.IWorkbenchPart;
/**
* Displays expressions and their values with a detail
* area.
*/
public class ExpressionView extends VariablesView {
/**
* A decorating label provider which provides color for expressions.
*/
protected class ExpressionViewDecoratingLabelProvider extends VariablesView.VariablesViewDecoratingLabelProvider {
/**
* @see org.eclipse.jface.viewers.IColorProvider#getForeground(java.lang.Object)
*/
public Color getForeground(Object element) {
boolean expressionWithError= false;
IErrorReportingExpression expression= null;
if (element instanceof IErrorReportingExpression) {
expression= (IErrorReportingExpression) element;
} else if (element instanceof String) {
Object parent= ((ITreeContentProvider)getVariablesViewer().getContentProvider()).getParent(element);
if (parent instanceof IErrorReportingExpression) {
expression= (IErrorReportingExpression) parent;
}
}
if (expression != null && expression.hasErrors()) {
expressionWithError= true;
}
if (expressionWithError) {
return Display.getDefault().getSystemColor(SWT.COLOR_RED);
}
return super.getForeground(element);
}
public ExpressionViewDecoratingLabelProvider(StructuredViewer viewer, ILabelProvider provider, DebugViewLabelDecorator decorator) {
super(viewer, provider, decorator);
}
}
/**
* @see org.eclipse.debug.internal.ui.views.variables.VariablesView#createLabelProvider()
*/
protected IBaseLabelProvider createLabelProvider(StructuredViewer viewer) {
return new ExpressionViewDecoratingLabelProvider(viewer, new DebugViewInterimLabelProvider(getModelPresentation()), new DebugViewLabelDecorator(getModelPresentation()));
}
/**
* Creates this view's content provider.
*
* @return a content provider
*/
protected IContentProvider createContentProvider(Viewer viewer) {
return new RemoteExpressionsContentProvider((RemoteTreeViewer)viewer, getSite(), this);
}
/**
* Creates this view's event handler.
*
* @return an event handler
*/
protected AbstractDebugEventHandler createEventHandler() {
return new ExpressionViewEventHandler(this);
}
/**
* @see AbstractDebugView#getHelpContextId()
*/
protected String getHelpContextId() {
return IDebugHelpContextIds.EXPRESSION_VIEW;
}
/**
* Initializes the viewer input on creation
*/
protected void setInitialContent() {
getViewer().setInput(DebugPlugin.getDefault().getExpressionManager());
}
/**
* Configures the toolBar.
*
* @param tbm The toolbar that will be configured
*/
protected void configureToolBar(IToolBarManager tbm) {
super.configureToolBar(tbm);
tbm.add(new Separator(IDebugUIConstants.EMPTY_EXPRESSION_GROUP));
tbm.add(new Separator(IDebugUIConstants.EXPRESSION_GROUP));
}
/**
* Adds items to the tree viewer's context menu including any extension defined
* actions.
*
* @param menu The menu to add the item to.
*/
protected void fillContextMenu(IMenuManager menu) {
menu.add(new Separator(IDebugUIConstants.EMPTY_EXPRESSION_GROUP));
menu.add(new Separator(IDebugUIConstants.EXPRESSION_GROUP));
menu.add(getAction("ChangeVariableValue")); //$NON-NLS-1$
menu.add(new Separator(IDebugUIConstants.EMPTY_RENDER_GROUP));
menu.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
}
/**
* The <code>ExpressionView</code> listens for selection changes in the <code>LaunchesView</code>
* to correctly set the editable state of the details pane. Updates the context of
* watch expressions.
*
* @see ISelectionListener#selectionChanged(IWorkbenchPart, ISelection)
*/
public void selectionChanged(IWorkbenchPart part, ISelection selection) {
if (!isVisible()) {
return;
}
if (selection instanceof IStructuredSelection) {
IDebugElement context = null;
IStructuredSelection ss = (IStructuredSelection)selection;
if (ss.size() < 2) {
Object object = ss.getFirstElement();
if (object instanceof IDebugElement) {
context= (IDebugElement) object;
} else if (object instanceof ILaunch) {
context= ((ILaunch) object).getDebugTarget();
}
}
// update watch expressions with new context
IExpression[] expressions = DebugPlugin.getDefault().getExpressionManager().getExpressions();
for (int i = 0; i < expressions.length; i++) {
IExpression expression = expressions[i];
if (expression instanceof IWatchExpression) {
((IWatchExpression)expression).setExpressionContext(context);
}
}
}
// update actions
updateAction("ContentAssist"); //$NON-NLS-1$
}
/**
* Do nothing - the input to this view never changes -
* it is always the expression manager.
*
* @see VariablesView#setViewerInput(IStructuredSelection)
*/
protected void setViewerInput(IStructuredSelection ssel) {
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.views.variables.VariablesView#treeSelectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent)
*/
protected void treeSelectionChanged(SelectionChangedEvent event) {
super.treeSelectionChanged(event);
ISelection selection = event.getSelection();
if (selection instanceof IStructuredSelection) {
IStructuredSelection ssel= (IStructuredSelection)selection;
if (ssel.size() == 1) {
Object input= ssel.getFirstElement();
if (input instanceof IDebugElement) {
getDetailViewer().setEditable(true);
return;
}
}
}
getDetailViewer().setEditable(false);
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.views.variables.VariablesView#getDetailPanePreferenceKey()
*/
protected String getDetailPanePreferenceKey() {
return IDebugPreferenceConstants.EXPRESSIONS_DETAIL_PANE_ORIENTATION;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.views.variables.VariablesView#getToggleActionLabel()
*/
protected String getToggleActionLabel() {
return VariablesViewMessages.getString("ExpressionView.4"); //$NON-NLS-1$
}
/* (non-Javadoc)
* @see org.eclipse.debug.ui.AbstractDebugView#createActions()
*/
protected void createActions() {
super.createActions();
setInitialContent();
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.views.variables.VariablesView#restoreState()
*/
protected void restoreState() {
}
/* (non-Javadoc)
* @see org.eclipse.ui.IViewPart#saveState(org.eclipse.ui.IMemento)
*/
public void saveState(IMemento memento) {
}
}
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