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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.ide.ui.internal.structuremergeviewer.actions;
import static com.google.common.collect.Iterables.addAll;
import static com.google.common.collect.Iterables.concat;
import static com.google.common.collect.Iterables.filter;
import static com.google.common.collect.Iterables.transform;
import static com.google.common.collect.Lists.newArrayList;
import com.google.common.base.Function;
import com.google.common.base.Preconditions;
import java.util.List;
import org.eclipse.compare.ICompareNavigator;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.notify.Notifier;
import org.eclipse.emf.compare.Diff;
import org.eclipse.emf.compare.command.ICompareCopyCommand;
import org.eclipse.emf.compare.domain.ICompareEditingDomain;
import org.eclipse.emf.compare.domain.IMergeRunnable;
import org.eclipse.emf.compare.ide.ui.internal.EMFCompareIDEUIMessages;
import org.eclipse.emf.compare.ide.ui.internal.EMFCompareIDEUIPlugin;
import org.eclipse.emf.compare.internal.merge.MergeMode;
import org.eclipse.emf.compare.merge.IMerger;
import org.eclipse.emf.compare.merge.IMerger.Registry;
import org.eclipse.emf.compare.rcp.ui.internal.structuremergeviewer.groups.IDifferenceGroup;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.tree.TreeNode;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.actions.BaseSelectionListenerAction;
import org.eclipse.ui.plugin.AbstractUIPlugin;
/**
* Abstract Action that manages a merge of a difference in case of both sides of the comparison are editable.
*
* @author <a href="mailto:axel.richard@obeo.fr">Axel Richard</a>
* @since 3.0
*/
public class MergeAction extends BaseSelectionListenerAction {
private static final Function<? super Adapter, ? extends Notifier> ADAPTER__TARGET = new Function<Adapter, Notifier>() {
public Notifier apply(Adapter adapter) {
return adapter.getTarget();
}
};
private final Registry mergerRegistry;
private final boolean leftToRight;
private final IMergeRunnable mergeRunnable;
private ICompareEditingDomain editingDomain;
private boolean cascadingDifferencesFilterEnabled;
private final List<Diff> selectedDifferences;
private final ICompareNavigator navigator;
/**
* Constructor.
*
* @param configuration
* The compare configuration object.
*/
public MergeAction(ICompareEditingDomain editingDomain, IMerger.Registry mergerRegistry, MergeMode mode,
boolean isLeftEditable, boolean isRightEditable, ICompareNavigator navigator) {
super(""); //$NON-NLS-1$
this.navigator = navigator;
Preconditions.checkNotNull(mode);
// at least should be editable
Preconditions.checkState(isLeftEditable || isRightEditable);
// if left and right editable, the only accepted mode are LtR or RtL
if (isLeftEditable && isRightEditable) {
Preconditions.checkState(mode == MergeMode.LEFT_TO_RIGHT || mode == MergeMode.RIGHT_TO_LEFT);
}
// if mode is accept or reject, left and right can't be both read only (no action should be created in
// this case) and can't be both editable.
if (isLeftEditable != isRightEditable) {
Preconditions.checkState(mode == MergeMode.ACCEPT || mode == MergeMode.REJECT);
}
this.editingDomain = editingDomain;
this.mergerRegistry = mergerRegistry;
this.leftToRight = mode.isLeftToRight(isLeftEditable, isRightEditable);
this.mergeRunnable = createMergeRunnable(mode, isLeftEditable, isRightEditable);
this.selectedDifferences = newArrayList();
initToolTipAndImage(mode);
}
protected IMergeRunnable createMergeRunnable(MergeMode mode, boolean isLeftEditable,
boolean isRightEditable) {
return new MergeRunnableImpl(isLeftEditable, isRightEditable, mode);
}
protected void initToolTipAndImage(MergeMode mode) {
switch (mode) {
case LEFT_TO_RIGHT:
setToolTipText(EMFCompareIDEUIMessages.getString("merged.to.right.tooltip")); //$NON-NLS-1$
setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin(
EMFCompareIDEUIPlugin.PLUGIN_ID, "icons/full/toolb16/merge_to_right.gif")); //$NON-NLS-1$
break;
case RIGHT_TO_LEFT:
setToolTipText(EMFCompareIDEUIMessages.getString("merged.to.left.tooltip")); //$NON-NLS-1$
setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin(
EMFCompareIDEUIPlugin.PLUGIN_ID, "icons/full/toolb16/merge_to_left.gif")); //$NON-NLS-1$
break;
case ACCEPT:
setToolTipText(EMFCompareIDEUIMessages.getString("accept.change.tooltip")); //$NON-NLS-1$
setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin(
EMFCompareIDEUIPlugin.PLUGIN_ID, "icons/full/toolb16/accept_change.gif")); //$NON-NLS-1$
break;
case REJECT:
setToolTipText(EMFCompareIDEUIMessages.getString("reject.change.tooltip")); //$NON-NLS-1$
setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin(
EMFCompareIDEUIPlugin.PLUGIN_ID, "icons/full/toolb16/reject_change.gif")); //$NON-NLS-1$
break;
default:
throw new IllegalStateException();
}
}
/**
* {@inheritDoc}
*
* @see org.eclipse.jface.action.Action#run()
*/
@Override
public void run() {
List<Diff> differences = getDifferencesToMerge();
ICompareCopyCommand mergeCommand = editingDomain.createCopyCommand(differences, leftToRight,
mergerRegistry, mergeRunnable);
editingDomain.getCommandStack().execute(mergeCommand);
if (navigator != null) {
// navigator is null in MergeAllNonConflictingAction
navigator.selectChange(true);
}
}
protected List<Diff> getDifferencesToMerge() {
List<Diff> differencesToMerge = newArrayList(selectedDifferences);
if (cascadingDifferencesFilterEnabled) {
Iterable<Diff> cascadingDifferences = concat(transform(selectedDifferences,
org.eclipse.emf.compare.utils.DiffUtil.getSubDiffs(leftToRight)));
addAll(differencesToMerge, cascadingDifferences);
}
return differencesToMerge;
}
public final void setCascadingDifferencesFilterEnabled(boolean enable) {
this.cascadingDifferencesFilterEnabled = enable;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.ui.actions.BaseSelectionListenerAction#updateSelection(org.eclipse.jface.viewers.IStructuredSelection)
*/
@Override
protected boolean updateSelection(IStructuredSelection selection) {
addAll(selectedDifferences, getSelectedDifferences(selection));
return selection.toList().size() == selectedDifferences.size();
}
/**
* {@inheritDoc}
*
* @see org.eclipse.ui.actions.BaseSelectionListenerAction#clearCache()
*/
@Override
protected void clearCache() {
selectedDifferences.clear();
}
private Iterable<Diff> getSelectedDifferences(IStructuredSelection selection) {
List<?> selectedObjects = selection.toList();
Iterable<Adapter> selectedAdapters = filter(selectedObjects, Adapter.class);
Iterable<Notifier> selectedNotifiers = transform(selectedAdapters, ADAPTER__TARGET);
Iterable<TreeNode> selectedTreeNode = filter(selectedNotifiers, TreeNode.class);
Iterable<EObject> selectedEObjects = transform(selectedTreeNode, IDifferenceGroup.TREE_NODE_DATA);
return filter(selectedEObjects, Diff.class);
}
/**
* @param newValue
*/
public final void setEditingDomain(ICompareEditingDomain editingDomain) {
this.editingDomain = editingDomain;
clearCache();
setEnabled(editingDomain != null && updateSelection(getStructuredSelection()));
}
/**
* @return the leftToRight
*/
protected final boolean isLeftToRight() {
return leftToRight;
}
}
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