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/*******************************************************************************
* Copyright (c) 2000, 2017 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
*******************************************************************************/
package org.eclipse.team.internal.ui.synchronize;
import org.eclipse.compare.structuremergeviewer.*;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.*;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.team.core.synchronize.SyncInfo;
import org.eclipse.team.ui.synchronize.ISynchronizeModelElement;
import org.eclipse.ui.model.IWorkbenchAdapter;
/**
* A model element that can be shown in viewers.
*
* @since 3.0
*/
public abstract class SynchronizeModelElement extends DiffNode implements IAdaptable, ISynchronizeModelElement {
/*
* Internal flags bits for storing properties in the flags variable
*/
private static final int BUSY_FLAG = 0x01;
private static final int PROPAGATED_CONFLICT_FLAG = 0x02;
private static final int PROPAGATED_ERROR_FLAG = 0x04;
private static final int PROPAGATED_WARNING_FLAG =0x08;
// Instance variable containing the flags for this node
private int flags;
private ListenerList listeners;
// Parent is required to ensure that busy (and other) state is cleared.
// This is needed as DiffContainer#remove() will null the parent
private SynchronizeModelElement parent;
public SynchronizeModelElement(IDiffContainer parent) {
super(parent, SyncInfo.IN_SYNC);
internalSetParent(parent);
}
@Override
public <T> T getAdapter(Class<T> adapter) {
return Platform.getAdapterManager().getAdapter(this, adapter);
}
@Override
public synchronized void addPropertyChangeListener(IPropertyChangeListener listener) {
if (listeners == null) {
listeners = new ListenerList(ListenerList.IDENTITY);
}
listeners.add(listener);
}
@Override
public synchronized void removePropertyChangeListener(IPropertyChangeListener listener) {
if (listeners != null) {
listeners.remove(listener);
if (listeners.isEmpty()) {
listeners = null;
}
}
}
@Override
public void setParent(IDiffContainer parent) {
super.setParent(parent);
internalSetParent(parent);
}
/**
* Return whether this node has the given property set.
* @param propertyName the flag to test
* @return <code>true</code> if the property is set
*/
@Override
public boolean getProperty(String propertyName) {
return (getFlags() & getFlag(propertyName)) > 0;
}
/**
* Add the flag to the flags for this node
* @param propertyName the flag to add
*/
@Override
public void setProperty(String propertyName, boolean value) {
if (value) {
if (!getProperty(propertyName)) {
int flag = getFlag(propertyName);
flags |= flag;
firePropertyChange(propertyName);
}
} else {
if (getProperty(propertyName)) {
int flag = getFlag(propertyName);
flags ^= flag;
firePropertyChange(propertyName);
}
}
}
@Override
public void setPropertyToRoot(String propertyName, boolean value) {
if (value) {
addToRoot(propertyName);
} else {
removeToRoot(propertyName);
}
}
public void fireChanges() {
fireChange();
}
@Override
public ImageDescriptor getImageDescriptor(Object object) {
IResource resource = getResource();
if(resource != null) {
IWorkbenchAdapter adapter = ((IAdaptable) resource).getAdapter(IWorkbenchAdapter.class);
return adapter.getImageDescriptor(resource);
}
return null;
}
@Override
public abstract IResource getResource();
private void addToRoot(String flag) {
setProperty(flag, true);
if (parent != null) {
if (parent.getProperty(flag)) return;
parent.addToRoot(flag);
}
}
private void firePropertyChange(String propertyName) {
Object[] allListeners;
synchronized(this) {
if (listeners == null) return;
allListeners = listeners.getListeners();
}
boolean set = getProperty(propertyName);
final PropertyChangeEvent event = new PropertyChangeEvent(this, propertyName, Boolean.valueOf(!set), Boolean.valueOf(set));
for (int i = 0; i < allListeners.length; i++) {
Object object = allListeners[i];
if (object instanceof IPropertyChangeListener) {
final IPropertyChangeListener listener = (IPropertyChangeListener)object;
SafeRunner.run(new ISafeRunnable() {
@Override
public void handleException(Throwable exception) {
// Exceptions logged by the platform
}
@Override
public void run() throws Exception {
listener.propertyChange(event);
}
});
}
}
}
private int getFlag(String propertyName) {
if (propertyName == BUSY_PROPERTY) {
return BUSY_FLAG;
} else if (propertyName == PROPAGATED_CONFLICT_PROPERTY) {
return PROPAGATED_CONFLICT_FLAG;
} else if(propertyName == PROPAGATED_ERROR_MARKER_PROPERTY) {
return PROPAGATED_ERROR_FLAG;
} else if(propertyName == PROPAGATED_WARNING_MARKER_PROPERTY) {
return PROPAGATED_WARNING_FLAG;
}
return 0;
}
private int getFlags() {
return flags;
}
private boolean hasChildWithFlag(String flag) {
IDiffElement[] childen = getChildren();
for (int i = 0; i < childen.length; i++) {
IDiffElement element = childen[i];
if (((SynchronizeModelElement)element).getProperty(flag)) {
return true;
}
}
return false;
}
private void removeToRoot(String flag) {
boolean hasProperty = getProperty(flag);
if(hasProperty) {
setProperty(flag, false);
if (parent != null) {
// If the parent doesn't have the tag, no recalculation is required
// Also, if the parent still has a child with the tag, no recalculation is needed
if (parent.getProperty(flag) && !parent.hasChildWithFlag(flag)) {
// The parent no longer has the flag so propogate the recalculation
parent.removeToRoot(flag);
}
}
}
}
private void internalSetParent(IDiffContainer parent) {
if (parent != null && parent instanceof SynchronizeModelElement) {
this.parent = (SynchronizeModelElement)parent;
}
}
/**
* Synchronize model elements are not copied so use identity as the
* equality check.
* @param object The object to test
* @return true if the objects are identical
*/
@Override
public boolean equals(Object object) {
return this==object;
}
@Override
public int hashCode() {
// Use the name to get the hashCode to ensure that we can find equal elements.
// (The inherited hashCode uses the path which can change when items are removed)
return getName().hashCode();
}
}
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