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/*******************************************************************************
* Copyright (c) 2006, 2009 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 River Systems - Fix for viewer state save/restore [188704]
* Pawel Piech (Wind River) - added support for a virtual tree model viewer (Bug 242489)
*******************************************************************************/
package org.eclipse.debug.internal.ui.viewers.model;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementContentProvider;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
import org.eclipse.jface.viewers.TreePath;
/**
* This class is public so the test suite has access - it should be default protection.
*
* @since 3.3
*/
public class ChildrenUpdate extends ViewerUpdateMonitor implements IChildrenUpdate {
private Object[] fElements;
private int fIndex;
private int fLength;
/**
* Constructs a request to update an element
*
* @param node node to update
* @param model model containing the node
*/
public ChildrenUpdate(ModelContentProvider provider, Object viewerInput, TreePath elementPath, Object element, int index, IElementContentProvider elementContentProvider, IPresentationContext context) {
super(provider, viewerInput, elementPath, element, elementContentProvider, context);
fIndex = index;
fLength = 1;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.debug.ui.viewers.AsynchronousRequestMonitor#performUpdate()
*/
protected void performUpdate() {
TreeModelContentProvider provider = (TreeModelContentProvider) getContentProvider();
TreePath elementPath = getElementPath();
if (fElements != null) {
ITreeModelContentProviderTarget viewer = provider.getViewer();
for (int i = 0; i < fElements.length; i++) {
int modelIndex = fIndex + i;
Object element = fElements[i];
if (element != null) {
int viewIndex = provider.modelToViewIndex(elementPath, modelIndex);
if (provider.shouldFilter(elementPath, element)) {
if (provider.addFilteredIndex(elementPath, modelIndex, element)) {
if (ModelContentProvider.DEBUG_CONTENT_PROVIDER && (ModelContentProvider.DEBUG_PRESENTATION_ID == null || ModelContentProvider.DEBUG_PRESENTATION_ID.equals(getPresentationContext().getId()))) {
System.out.println("REMOVE(" + getElement() + ", modelIndex: " + modelIndex + " viewIndex: " + viewIndex + ", " + element + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
}
viewer.remove(elementPath, viewIndex);
}
} else {
if (provider.isFiltered(elementPath, modelIndex)) {
provider.clearFilteredChild(elementPath, modelIndex);
int insertIndex = provider.modelToViewIndex(elementPath, modelIndex);
if (ModelContentProvider.DEBUG_CONTENT_PROVIDER) {
System.out.println("insert(" + getElement() + ", modelIndex: " + modelIndex + " insertIndex: " + insertIndex + ", " + element + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
}
viewer.insert(elementPath, element, insertIndex);
} else {
if (ModelContentProvider.DEBUG_CONTENT_PROVIDER && (ModelContentProvider.DEBUG_PRESENTATION_ID == null || ModelContentProvider.DEBUG_PRESENTATION_ID.equals(getPresentationContext().getId()))) {
System.out.println("replace(" + getElement() + ", modelIndex: " + modelIndex + " viewIndex: " + viewIndex + ", " + element + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
}
viewer.replace(elementPath, viewIndex, element);
}
TreePath childPath = elementPath.createChildPath(element);
provider.updateHasChildren(childPath);
provider.doRestore(childPath, modelIndex, false, false);
}
}
}
} else {
provider.updateHasChildren(elementPath);
}
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate#setChild(java.lang.Object, int)
*/
public void setChild(Object child, int index) {
if (fElements == null) {
fElements = new Object[fLength];
}
fElements[index - fIndex] = child;
}
/* (non-Javadoc)
*
* This method is public so the test suite has access - it should be default protection.
*
* @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#coalesce(org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor)
*/
public synchronized boolean coalesce(ViewerUpdateMonitor request) {
if (request instanceof ChildrenUpdate) {
ChildrenUpdate cu = (ChildrenUpdate) request;
if (getElement().equals(cu.getElement()) && getElementPath().equals(cu.getElementPath())) {
int end = fIndex + fLength;
int otherStart = cu.getOffset();
int otherEnd = otherStart + cu.getLength();
if ((otherStart >= fIndex && otherStart <= end) || (otherEnd >= fIndex && otherEnd <= end)) {
// overlap
fIndex = Math.min(fIndex, otherStart);
end = Math.max(end, otherEnd);
fLength = end - fIndex;
if (ModelContentProvider.DEBUG_CONTENT_PROVIDER && (ModelContentProvider.DEBUG_PRESENTATION_ID == null || ModelContentProvider.DEBUG_PRESENTATION_ID.equals(getPresentationContext().getId()))) {
System.out.println("coalesced: " + this.toString()); //$NON-NLS-1$
}
return true;
}
}
}
return false;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate#getLength()
*/
public int getLength() {
return fLength;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate#getOffset()
*/
public int getOffset() {
return fIndex;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#startRequest()
*/
void startRequest() {
getElementContentProvider().update(new IChildrenUpdate[]{this});
}
public String toString() {
StringBuffer buf = new StringBuffer();
buf.append("IChildrenUpdate: "); //$NON-NLS-1$
buf.append(getElement());
buf.append(" {"); //$NON-NLS-1$
buf.append(getOffset());
buf.append("->"); //$NON-NLS-1$
buf.append(getOffset() + getLength());
buf.append("}"); //$NON-NLS-1$
return buf.toString();
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#getPriority()
*/
int getPriority() {
return 3;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#getSchedulingPath()
*/
TreePath getSchedulingPath() {
return getElementPath();
}
/**
* Sets this request's offset. Used when modifying a waiting request when
* the offset changes due to a removed element.
*
* @param offset new offset
*/
void setOffset(int offset) {
fIndex = offset;
}
}
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