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/*******************************************************************************
* Copyright (c) 2006, 2013 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
* Wind Rvier Systems - added support for columns (bug 235646)
*******************************************************************************/
package org.eclipse.debug.internal.ui.model.elements;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.IExpressionManager;
import org.eclipse.debug.core.ILaunch;
import org.eclipse.debug.core.model.IDebugElement;
import org.eclipse.debug.core.model.IWatchExpression;
import org.eclipse.debug.internal.core.IInternalDebugCoreConstants;
import org.eclipse.debug.internal.ui.DebugUIMessages;
import org.eclipse.debug.internal.ui.DefaultLabelProvider;
import org.eclipse.debug.internal.ui.IInternalDebugUIConstants;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementEditor;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementLabelProvider;
import org.eclipse.debug.internal.ui.viewers.model.provisional.ILabelUpdate;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ICellModifier;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Composite;
/**
* Default content provider for the expression manager.
*/
public class ExpressionManagerContentProvider extends ElementContentProvider {
/**
* An element representing the "Add new expression" entry in the
* expressions view.
*
* @since 3.6
*/
private static class AddNewExpressionElement implements IElementLabelProvider, IElementEditor, ICellModifier {
@Override
public void update(ILabelUpdate[] updates) {
for (int i = 0; i < updates.length; i++) {
String[] columnIds = updates[i].getColumnIds();
if (columnIds == null) {
updateLabel(updates[i], 0);
} else {
for (int j = 0; j < columnIds.length; j++) {
if (IDebugUIConstants.COLUMN_ID_VARIABLE_NAME.equals(columnIds[j])) {
updateLabel(updates[i], j);
} else {
updates[i].setLabel(IInternalDebugCoreConstants.EMPTY_STRING, j);
}
}
}
updates[i].done();
}
}
@SuppressWarnings("deprecation")
private void updateLabel(ILabelUpdate update, int columnIndex) {
update.setLabel(DebugUIMessages.ExpressionManagerContentProvider_1, columnIndex);
update.setImageDescriptor(DebugUITools.getImageDescriptor(IInternalDebugUIConstants.IMG_LCL_MONITOR_EXPRESSION), columnIndex);
// Display the "Add new expression" element in italic to
// distinguish it from user elements in view.
FontData fontData = JFaceResources.getFontDescriptor(IDebugUIConstants.PREF_VARIABLE_TEXT_FONT).getFontData()[0];
fontData.setStyle(SWT.ITALIC);
update.setFontData(fontData, columnIndex);
}
@Override
public CellEditor getCellEditor(IPresentationContext context, String columnId, Object element, Composite parent) {
return new TextCellEditor(parent);
}
@Override
public ICellModifier getCellModifier(IPresentationContext context, Object element) {
return this;
}
@Override
public boolean canModify(Object element, String property) {
return (IDebugUIConstants.COLUMN_ID_VARIABLE_NAME.equals(property));
}
@Override
public Object getValue(Object element, String property) {
return IInternalDebugCoreConstants.EMPTY_STRING;
}
@Override
public void modify(Object element, String property, Object value) {
// If an expression is entered, add a new watch expression to the
// manager.
if (value instanceof String &&
!IInternalDebugCoreConstants.EMPTY_STRING.equals( ((String)value).trim()) )
{
String expressionText = DefaultLabelProvider.encodeEsacpedChars((String)value);
IWatchExpression newExpression=
DebugPlugin.getDefault().getExpressionManager().newWatchExpression(expressionText);
DebugPlugin.getDefault().getExpressionManager().addExpression(newExpression);
newExpression.setExpressionContext(getContext());
}
}
private IDebugElement getContext() {
IAdaptable object = DebugUITools.getDebugContext();
IDebugElement context = null;
if (object instanceof IDebugElement) {
context = (IDebugElement) object;
} else if (object instanceof ILaunch) {
context = ((ILaunch) object).getDebugTarget();
}
return context;
}
}
private static final AddNewExpressionElement ADD_NEW_EXPRESSION_ELEMENT = new AddNewExpressionElement();
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.provisional.elements.ElementContentProvider#getChildCount(java.lang.Object, org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext)
*/
@Override
protected int getChildCount(Object element, IPresentationContext context, IViewerUpdate monitor) throws CoreException {
// Add the "Add new expression" element only if columns are displayed.
return ((IExpressionManager) element).getExpressions().length +
(context.getColumns() != null ? 1 : 0);
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.provisional.elements.ElementContentProvider#getChildren(java.lang.Object, int, int, org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext)
*/
@Override
protected Object[] getChildren(Object parent, int index, int length, IPresentationContext context, IViewerUpdate monitor) throws CoreException {
if (context.getColumns() != null) {
return getElements(((IExpressionManager) parent).getExpressions(), ADD_NEW_EXPRESSION_ELEMENT, index, length);
} else {
return getElements(((IExpressionManager) parent).getExpressions(), index, length);
}
}
/**
* Returns a subrange of elements from the given elements array plus the last element.
*
* @see ElementContentProvider#getElements(Object[], int, int)
*
* @since 3.6
*/
private Object[] getElements(Object[] elements, Object lastElement, int index, int length) {
int max = elements.length + 1;
if (index < max && ((index + length) > max)) {
length = max - index;
}
if ((index + length) <= max) {
Object[] sub = new Object[length];
System.arraycopy(elements, index, sub, 0, Math.min(elements.length - index, length));
if (index + length > elements.length) {
sub[length - 1] = lastElement;
}
return sub;
}
return null;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.provisional.elements.ElementContentProvider#supportsContextId(java.lang.String)
*/
@Override
protected boolean supportsContextId(String id) {
return id.equals(IDebugUIConstants.ID_EXPRESSION_VIEW);
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.model.elements.ElementContentProvider#hasChildren(java.lang.Object, org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext, org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate)
*/
@Override
protected boolean hasChildren(Object element, IPresentationContext context, IViewerUpdate monitor) throws CoreException {
return true;
}
}
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