org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/viewers/model/ChildrenUpdate.java - gerrit/platform/eclipse.platform.debug - Git at Google

 /*******************************************************************************
  * Copyright (c) 2006, 2012 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * 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.DebugUIPlugin;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementContentProvider;
 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 provider the content provider
 	 * @param viewerInput the current input
 	 * @param elementPath the path to the element being update
 	 * @param element the element
 	 * @param index the index of the element
 	 * @param elementContentProvider the content provider for the element
 	 */
 	public ChildrenUpdate(TreeModelContentProvider provider, Object viewerInput, TreePath elementPath, Object element, int index, IElementContentProvider elementContentProvider) {
 		super(provider, viewerInput, elementPath, element, elementContentProvider, provider.getPresentationContext());
 		fIndex = index;
 		fLength = 1;
 	}

 	public ChildrenUpdate(TreeModelContentProvider provider, Object viewerInput, TreePath elementPath, Object element, int index, int length, IElementContentProvider elementContentProvider) {
 		super(provider, viewerInput, elementPath, element, elementContentProvider, provider.getPresentationContext());
 		fIndex = index;
 		fLength = length;
 	}


 	protected void performUpdate(boolean updateFilterOnly) {
 		TreeModelContentProvider provider = getContentProvider();
 		TreePath elementPath = getElementPath();
 		if (fElements != null) {
 			IInternalTreeModelViewer 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 (!updateFilterOnly) {
                                 if (DebugUIPlugin.DEBUG_CONTENT_PROVIDER && DebugUIPlugin.DEBUG_TEST_PRESENTATION_ID(getPresentationContext())) {
                                 	DebugUIPlugin.trace("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);
                             if (!updateFilterOnly) {
 								int insertIndex = provider.modelToViewIndex(elementPath, modelIndex);
 								if (DebugUIPlugin.DEBUG_CONTENT_PROVIDER) {
 									DebugUIPlugin.trace("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 (!updateFilterOnly){
 		                    if (DebugUIPlugin.DEBUG_CONTENT_PROVIDER && DebugUIPlugin.DEBUG_TEST_PRESENTATION_ID(getPresentationContext())) {
 		                    	DebugUIPlugin.trace("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);
 						}
 						if (!updateFilterOnly) {
 							TreePath childPath = elementPath.createChildPath(element);
 							provider.updateHasChildren(childPath);
 							provider.getStateTracker().restorePendingStateOnUpdate(childPath, modelIndex, false, false, false);
 						}
 					}
 				}
 			}

 			if (!updateFilterOnly) {
 				provider.getStateTracker().restorePendingStateOnUpdate(elementPath, -1, true, true, true);
 			}
 		} else if (!updateFilterOnly) {
 			provider.updateHasChildren(elementPath);
 		}

 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.debug.ui.viewers.AsynchronousRequestMonitor#performUpdate()
 	 */
 	@Override
 	protected void performUpdate() {
 		performUpdate(false);
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate#setChild(java.lang.Object, int)
 	 */
 	@Override
 	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)
 	 */
 	@Override
 	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 (DebugUIPlugin.DEBUG_CONTENT_PROVIDER && DebugUIPlugin.DEBUG_TEST_PRESENTATION_ID(getPresentationContext())) {
 						DebugUIPlugin.trace("coalesced: " + this.toString()); //$NON-NLS-1$
 					}
 					return true;
 				}
 			}
 		}
 		return false;
 	}

 	@Override
 	boolean containsUpdate(TreePath path) {
         return getElementPath().equals(path);
     }


 	/* (non-Javadoc)
 	 * @see org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate#getLength()
 	 */
 	@Override
 	public int getLength() {
 		return fLength;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate#getOffset()
 	 */
 	@Override
 	public int getOffset() {
 		return fIndex;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#startRequest()
 	 */
 	@Override
 	void startRequest() {
 		getElementContentProvider().update(new IChildrenUpdate[]{this});
 	}

 	@Override
 	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() - 1);
 		buf.append("}"); //$NON-NLS-1$
 		return buf.toString();
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#getPriority()
 	 */
 	@Override
 	int getPriority() {
 		return 3;
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#getSchedulingPath()
 	 */
 	@Override
 	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;
 	}

 	Object[] getElements() {
 	    return fElements;
 	}

     @Override
 	protected boolean doEquals(ViewerUpdateMonitor update) {
         return
             update instanceof ChildrenUpdate &&
             ((ChildrenUpdate)update).getOffset() == getOffset() &&
             ((ChildrenUpdate)update).getLength() == getLength() &&
             getViewerInput().equals(update.getViewerInput()) &&
             getElementPath().equals(update.getElementPath());
     }

     @Override
 	protected int doHashCode() {
         return (int)Math.pow(
             (getClass().hashCode() + getViewerInput().hashCode() + getElementPath().hashCode()) * (getOffset() + 2),
             getLength() + 2);
     }

 }
	/*******************************************************************************
	* Copyright (c) 2006, 2012 IBM Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* 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.DebugUIPlugin;
	import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate;
	import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementContentProvider;
	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 provider the content provider
	* @param viewerInput the current input
	* @param elementPath the path to the element being update
	* @param element the element
	* @param index the index of the element
	* @param elementContentProvider the content provider for the element
	*/
	public ChildrenUpdate(TreeModelContentProvider provider, Object viewerInput, TreePath elementPath, Object element, int index, IElementContentProvider elementContentProvider) {
	super(provider, viewerInput, elementPath, element, elementContentProvider, provider.getPresentationContext());
	fIndex = index;
	fLength = 1;
	}

	public ChildrenUpdate(TreeModelContentProvider provider, Object viewerInput, TreePath elementPath, Object element, int index, int length, IElementContentProvider elementContentProvider) {
	super(provider, viewerInput, elementPath, element, elementContentProvider, provider.getPresentationContext());
	fIndex = index;
	fLength = length;
	}


	protected void performUpdate(boolean updateFilterOnly) {
	TreeModelContentProvider provider = getContentProvider();
	TreePath elementPath = getElementPath();
	if (fElements != null) {
	IInternalTreeModelViewer 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 (!updateFilterOnly) {
	if (DebugUIPlugin.DEBUG_CONTENT_PROVIDER && DebugUIPlugin.DEBUG_TEST_PRESENTATION_ID(getPresentationContext())) {
	DebugUIPlugin.trace("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);
	if (!updateFilterOnly) {
	int insertIndex = provider.modelToViewIndex(elementPath, modelIndex);
	if (DebugUIPlugin.DEBUG_CONTENT_PROVIDER) {
	DebugUIPlugin.trace("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 (!updateFilterOnly){
	if (DebugUIPlugin.DEBUG_CONTENT_PROVIDER && DebugUIPlugin.DEBUG_TEST_PRESENTATION_ID(getPresentationContext())) {
	DebugUIPlugin.trace("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);
	}
	if (!updateFilterOnly) {
	TreePath childPath = elementPath.createChildPath(element);
	provider.updateHasChildren(childPath);
	provider.getStateTracker().restorePendingStateOnUpdate(childPath, modelIndex, false, false, false);
	}
	}
	}
	}

	if (!updateFilterOnly) {
	provider.getStateTracker().restorePendingStateOnUpdate(elementPath, -1, true, true, true);
	}
	} else if (!updateFilterOnly) {
	provider.updateHasChildren(elementPath);
	}

	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.debug.ui.viewers.AsynchronousRequestMonitor#performUpdate()
	*/
	@Override
	protected void performUpdate() {
	performUpdate(false);
	}

	/* (non-Javadoc)
	* @see org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate#setChild(java.lang.Object, int)
	*/
	@Override
	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)
	*/
	@Override
	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 (DebugUIPlugin.DEBUG_CONTENT_PROVIDER && DebugUIPlugin.DEBUG_TEST_PRESENTATION_ID(getPresentationContext())) {
	DebugUIPlugin.trace("coalesced: " + this.toString()); //$NON-NLS-1$
	}
	return true;
	}
	}
	}
	return false;
	}

	@Override
	boolean containsUpdate(TreePath path) {
	return getElementPath().equals(path);
	}



	/* (non-Javadoc)
	* @see org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate#getLength()
	*/
	@Override
	public int getLength() {
	return fLength;
	}

	/* (non-Javadoc)
	* @see org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate#getOffset()
	*/
	@Override
	public int getOffset() {
	return fIndex;
	}

	/* (non-Javadoc)
	* @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#startRequest()
	*/
	@Override
	void startRequest() {
	getElementContentProvider().update(new IChildrenUpdate[]{this});
	}

	@Override
	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() - 1);
	buf.append("}"); //$NON-NLS-1$
	return buf.toString();
	}

	/* (non-Javadoc)
	* @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#getPriority()
	*/
	@Override
	int getPriority() {
	return 3;
	}

	/* (non-Javadoc)
	* @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#getSchedulingPath()
	*/
	@Override
	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;
	}

	Object[] getElements() {
	return fElements;
	}

	@Override
	protected boolean doEquals(ViewerUpdateMonitor update) {
	return
	update instanceof ChildrenUpdate &&
	((ChildrenUpdate)update).getOffset() == getOffset() &&
	((ChildrenUpdate)update).getLength() == getLength() &&
	getViewerInput().equals(update.getViewerInput()) &&
	getElementPath().equals(update.getElementPath());
	}

	@Override
	protected int doHashCode() {
	return (int)Math.pow(
	(getClass().hashCode() + getViewerInput().hashCode() + getElementPath().hashCode()) * (getOffset() + 2),
	getLength() + 2);
	}

	}