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/*******************************************************************************
* Copyright (c) 2013 Obeo.
* 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:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.emf.compare.provider.spec;
import static com.google.common.collect.Lists.newArrayList;
import com.google.common.collect.ImmutableCollection;
import com.google.common.collect.ImmutableList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.compare.DifferenceKind;
import org.eclipse.emf.compare.DifferenceSource;
import org.eclipse.emf.compare.Match;
import org.eclipse.emf.compare.ResourceAttachmentChange;
import org.eclipse.emf.compare.provider.AdapterFactoryUtil;
import org.eclipse.emf.compare.provider.IItemDescriptionProvider;
import org.eclipse.emf.compare.provider.IItemStyledLabelProvider;
import org.eclipse.emf.compare.provider.ResourceAttachmentChangeItemProvider;
import org.eclipse.emf.compare.provider.utils.ComposedStyledString;
import org.eclipse.emf.compare.provider.utils.IStyledString.IComposedStyledString;
import org.eclipse.emf.compare.provider.utils.IStyledString.Style;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
/**
* Specialized {@link ResourceAttachmentChangeItemProvider} returning nice output for {@link #getText(Object)}
* and {@link #getImage(Object)}.
*
* @author <a href="mailto:axel.richard@obeo.fr">Axel Richard</a>
* @since 3.0
*/
public class ResourceAttachmentChangeItemProviderSpec extends ResourceAttachmentChangeItemProvider implements IItemStyledLabelProvider, IItemDescriptionProvider {
/** The image provider used with this item provider. */
private final OverlayImageProvider overlayProvider;
/**
* Constructor calling super {@link #ResourceAttachmentChangeItemProvider(AdapterFactory)}.
*
* @param adapterFactory
* The adapter factory.
*/
public ResourceAttachmentChangeItemProviderSpec(AdapterFactory adapterFactory) {
super(adapterFactory);
overlayProvider = new OverlayImageProvider(getResourceLocator());
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.provider.ResourceAttachmentChangeItemProvider#getChildren(java.lang.Object)
*/
@Override
public Collection<?> getChildren(Object object) {
Collection<?> superChildren = super.getChildren(object);
List<? super Object> ret = newArrayList(superChildren);
ResourceAttachmentChange resourceAttachmentChange = (ResourceAttachmentChange)object;
final EObject value;
switch (resourceAttachmentChange.getSource()) {
case LEFT:
value = resourceAttachmentChange.getMatch().getLeft();
break;
case RIGHT:
value = resourceAttachmentChange.getMatch().getRight();
break;
default:
value = null;
new IllegalStateException();
break;
}
Match matchOfValue = resourceAttachmentChange.getMatch().getComparison().getMatch(value);
if (matchOfValue != null) {
Collection<?> children = getChildren(matchOfValue);
children.remove(resourceAttachmentChange);
ret.addAll(children);
}
return ImmutableList.copyOf(ret);
}
/**
* Returns the children of the given {@link Match}.
*
* @param matchOfValue
* the given {@link Match}.
* @return the children of the given {@link Match}.
*/
private Collection<?> getChildren(Match matchOfValue) {
final Collection<?> children;
ITreeItemContentProvider matchItemContentProvider = (ITreeItemContentProvider)adapterFactory.adapt(
matchOfValue, ITreeItemContentProvider.class);
if (matchItemContentProvider != null) {
Collection<?> itemProviderChildren = matchItemContentProvider.getChildren(matchOfValue);
if (itemProviderChildren instanceof ImmutableCollection<?>) {
children = newArrayList(itemProviderChildren);
} else {
children = itemProviderChildren;
}
Iterator<?> childrenIterator = children.iterator();
while (childrenIterator.hasNext()) {
Object child = childrenIterator.next();
if (child instanceof Match) {
if (!matchItemContentProvider.hasChildren(child)) {
childrenIterator.remove();
}
}
}
} else {
children = ImmutableList.of();
}
return children;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.provider.MatchItemProvider#getImage(java.lang.Object)
*/
@Override
public Object getImage(Object object) {
final Match match = ((ResourceAttachmentChange)object).getMatch();
Object ret = AdapterFactoryUtil.getImage(getRootAdapterFactory(), match.getLeft());
if (ret == null) {
ret = AdapterFactoryUtil.getImage(getRootAdapterFactory(), match.getRight());
}
if (ret == null) {
ret = AdapterFactoryUtil.getImage(getRootAdapterFactory(), match.getOrigin());
}
if (ret == null) {
ret = super.getImage(object);
}
Object matchImage = overlayProvider.getComposedImage((ResourceAttachmentChange)object, ret);
ret = overlayImage(object, matchImage);
return ret;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.provider.ResourceAttachmentChangeItemProvider#getText(java.lang.Object)
*/
@Override
public String getText(Object object) {
return getStyledText(object).getString();
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.provider.IItemStyledLabelProvider#getStyledText(java.lang.Object)
*/
public IComposedStyledString getStyledText(Object object) {
final Match match = ((ResourceAttachmentChange)object).getMatch();
String value = AdapterFactoryUtil.getText(getRootAdapterFactory(), match.getLeft());
if (value == null) {
value = AdapterFactoryUtil.getText(getRootAdapterFactory(), match.getRight());
}
if (value == null) {
value = AdapterFactoryUtil.getText(getRootAdapterFactory(), match.getOrigin());
}
if (value == null) {
value = super.getText(object);
}
ComposedStyledString ret = new ComposedStyledString(value);
DifferenceKind labelValue = ((ResourceAttachmentChange)object).getKind();
String label = labelValue == null ? "" : labelValue.toString().toLowerCase(); //$NON-NLS-1$
return ret.append(" [resource contents " + label + "]", Style.DECORATIONS_STYLER); //$NON-NLS-1$ //$NON-NLS-2$
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.provider.IItemDescriptionProvider#getDescription(java.lang.Object)
*/
public String getDescription(Object object) {
final ResourceAttachmentChange rac = (ResourceAttachmentChange)object;
final Match match = rac.getMatch();
String ret = AdapterFactoryUtil.getText(getRootAdapterFactory(), match.getLeft());
if (ret == null) {
ret = AdapterFactoryUtil.getText(getRootAdapterFactory(), match.getRight());
}
if (ret == null) {
ret = AdapterFactoryUtil.getText(getRootAdapterFactory(), match.getOrigin());
}
if (ret == null) {
ret = super.getText(object);
}
String remotely = "";
if (rac.getSource() == DifferenceSource.RIGHT) {
remotely = "remotely ";
}
DifferenceKind labelValue = rac.getKind();
final String hasBeen = " has been ";
switch (labelValue) {
case ADD:
ret += hasBeen + remotely + "added to resource contents";
break;
case DELETE:
ret += hasBeen + remotely + "deleted from resource contents";
break;
case MOVE:
ret += hasBeen + remotely + "moved in resource contents";
break;
default:
throw new IllegalStateException("Unsupported " + DifferenceKind.class.getSimpleName()
+ " value: " + rac.getKind());
}
return ret;
}
}
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