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/*******************************************************************************
* Copyright (C) 2011, Philipp Thun <philipp.thun@sap.com>
*
* 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
*******************************************************************************/
package org.eclipse.egit.ui.internal.decorators;
import java.io.IOException;
import java.util.ArrayList;
import org.eclipse.core.resources.IResource;
import org.eclipse.egit.core.ContainerTreeIterator;
import org.eclipse.egit.core.ContainerTreeIterator.ResourceEntry;
import org.eclipse.egit.core.IteratorService;
import org.eclipse.egit.core.project.RepositoryMapping;
import org.eclipse.egit.ui.internal.decorators.IDecoratableResource.Staged;
import org.eclipse.jgit.dircache.DirCacheEntry;
import org.eclipse.jgit.dircache.DirCacheIterator;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.FileMode;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.treewalk.EmptyTreeIterator;
import org.eclipse.jgit.treewalk.TreeWalk;
import org.eclipse.jgit.treewalk.WorkingTreeIterator;
import org.eclipse.jgit.treewalk.filter.PathFilterGroup;
/**
* Helper class to create decoratable resources
*
* @see IDecoratableResource
*/
class DecoratableResourceHelper {
static final int T_HEAD = 0;
static final int T_INDEX = 1;
static final int T_WORKSPACE = 2;
static IDecoratableResource[] createDecoratableResources(
final IResource[] resources) throws IOException {
// Use first (available) resource to get repository mapping
int i = 0;
while (resources[i] == null) {
i++;
if (i >= resources.length)
// Array only contains nulls
return null;
}
final RepositoryMapping mapping = RepositoryMapping
.getMapping(resources[i]);
final IDecoratableResource[] decoratableResources = new IDecoratableResource[resources.length];
ArrayList<String> resourcePaths = new ArrayList<String>();
for (i = 0; i < resources.length; i++) {
final IResource resource = resources[i];
if (resource != null && resource.getProject().isOpen()) {
switch (resource.getType()) {
case IResource.FILE:
// Add file path to list used for bulk decoration
resourcePaths.add(mapping.getRepoRelativePath(resource));
break;
case IResource.FOLDER:
case IResource.PROJECT:
// Decorate folder and project node separately
try {
decoratableResources[i] = new DecoratableResourceAdapter(
resource);
} catch (IOException e) {
// Ignore - decoratableResources[i] is null
}
resourcePaths.add(null);
break;
}
} else {
resourcePaths.add(null);
}
}
// Check resource paths before proceeding with bulk decoration
boolean containsAtLeastOnePath = false;
for (final String p : resourcePaths) {
if (p != null) {
containsAtLeastOnePath = true;
break;
}
}
if (!containsAtLeastOnePath)
return decoratableResources;
final TreeWalk treeWalk = createThreeWayTreeWalk(mapping, resourcePaths);
if (treeWalk != null)
while (treeWalk.next()) {
i = resourcePaths.indexOf(treeWalk.getPathString());
if (i != -1) {
try {
if (decoratableResources[i] == null)
decoratableResources[i] = decorateResource(
new DecoratableResource(resources[i]),
treeWalk);
} catch (IOException e) {
// Ignore - decoratableResources[i] is null
}
}
}
return decoratableResources;
}
private static TreeWalk createThreeWayTreeWalk(
final RepositoryMapping mapping,
final ArrayList<String> resourcePaths) throws IOException {
final Repository repository = mapping.getRepository();
final TreeWalk treeWalk = new TreeWalk(repository);
// Copy path list...
final ArrayList<String> paths = new ArrayList<String>(resourcePaths);
while (paths.remove(null)) {
// ... and remove nulls
}
treeWalk.setFilter(PathFilterGroup.createFromStrings(paths));
treeWalk.setRecursive(true);
treeWalk.reset();
// Repository
final ObjectId headId = repository.resolve(Constants.HEAD);
if (headId != null)
treeWalk.addTree(new RevWalk(repository).parseTree(headId));
else
treeWalk.addTree(new EmptyTreeIterator());
// Index
treeWalk.addTree(new DirCacheIterator(repository.readDirCache()));
// Working directory
treeWalk.addTree(IteratorService.createInitialIterator(repository));
return treeWalk;
}
static DecoratableResource decorateResource(
final DecoratableResource decoratableResource,
final TreeWalk treeWalk) throws IOException {
final WorkingTreeIterator workingTreeIterator = treeWalk.getTree(
T_WORKSPACE, WorkingTreeIterator.class);
if (workingTreeIterator == null)
return null;
if (!(workingTreeIterator instanceof ContainerTreeIterator))
return null;
final ContainerTreeIterator workspaceIterator = (ContainerTreeIterator) workingTreeIterator;
final ResourceEntry resourceEntry = workspaceIterator
.getResourceEntry();
if (resourceEntry == null)
return null;
if (workspaceIterator.isEntryIgnored()) {
decoratableResource.ignored = true;
return decoratableResource;
}
final int mHead = treeWalk.getRawMode(T_HEAD);
final int mIndex = treeWalk.getRawMode(T_INDEX);
if (mHead == FileMode.MISSING.getBits()
&& mIndex == FileMode.MISSING.getBits())
return decoratableResource;
decoratableResource.tracked = true;
if (mHead == FileMode.MISSING.getBits()) {
decoratableResource.staged = Staged.ADDED;
} else if (mIndex == FileMode.MISSING.getBits()) {
decoratableResource.staged = Staged.REMOVED;
} else if (mHead != mIndex
|| (mIndex != FileMode.TREE.getBits() && !treeWalk.idEqual(
T_HEAD, T_INDEX))) {
decoratableResource.staged = Staged.MODIFIED;
} else {
decoratableResource.staged = Staged.NOT_STAGED;
}
final DirCacheIterator indexIterator = treeWalk.getTree(T_INDEX,
DirCacheIterator.class);
final DirCacheEntry indexEntry = indexIterator != null ? indexIterator
.getDirCacheEntry() : null;
if (indexEntry == null)
return decoratableResource;
if (indexEntry.getStage() > 0)
decoratableResource.conflicts = true;
if (indexEntry.isAssumeValid()) {
decoratableResource.dirty = false;
decoratableResource.assumeValid = true;
} else {
if (workspaceIterator.isModified(indexEntry, true))
decoratableResource.dirty = true;
}
return decoratableResource;
}
}
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