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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.vcs.log.graph;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.util.NotNullFunction;
import com.intellij.util.containers.ContainerUtil;
import com.intellij.util.containers.hash.LinkedHashMap;
import com.intellij.vcs.log.Hash;
import com.intellij.vcs.log.VcsLogRefManager;
import com.intellij.vcs.log.VcsRef;
import com.intellij.vcs.log.data.RefsModel;
import org.jetbrains.annotations.NotNull;
import java.util.*;
public class GraphColorManagerImpl implements GraphColorManager<Integer> {
private static final Logger LOG = Logger.getInstance(GraphColorManagerImpl.class);
static final int DEFAULT_COLOR = 0;
@NotNull private final RefsModel myRefsModel;
@NotNull private final NotNullFunction<Integer, Hash> myHashGetter;
@NotNull private final Map<VirtualFile, VcsLogRefManager> myRefManagers;
@NotNull private final LinkedHashMap<Integer, Integer> myErrorWasReported = new LinkedHashMap<Integer, Integer>(10) {
@Override
protected boolean removeEldestEntry(Map.Entry<Integer, Integer> eldest) {
return size() > 100;
}
};
public GraphColorManagerImpl(@NotNull RefsModel refsModel, @NotNull NotNullFunction<Integer, Hash> hashGetter,
@NotNull Map<VirtualFile, VcsLogRefManager> refManagers) {
myRefsModel = refsModel;
myHashGetter = hashGetter;
myRefManagers = refManagers;
}
@Override
public int getColorOfBranch(Integer headCommit) {
Collection<VcsRef> refs = myRefsModel.refsToCommit(headCommit);
if (isEmptyRefs(refs, headCommit)) {
return DEFAULT_COLOR;
}
VcsRef firstRef = Collections.min(refs, getRefManager(refs).getComparator());
// TODO dark variant
return firstRef.getName().hashCode();
}
private boolean isEmptyRefs(@NotNull Collection<VcsRef> refs, int head) {
if (refs.isEmpty()) {
if (!myErrorWasReported.containsKey(head)) {
myErrorWasReported.put(head, head);
LOG.warn("No references found at head " + head + " which corresponds to hash " + myHashGetter.fun(head));
}
return true;
}
return false;
}
@Override
public int getColorOfFragment(Integer headCommit, int magicIndex) {
return magicIndex;
}
@Override
public int compareHeads(Integer head1, Integer head2) {
if (head1.equals(head2)) {
return 0;
}
Collection<VcsRef> refs1 = myRefsModel.refsToCommit(head1);
Collection<VcsRef> refs2 = myRefsModel.refsToCommit(head2);
boolean firstEmpty = isEmptyRefs(refs1, head1);
boolean secondEmpty = isEmptyRefs(refs2, head2);
if (firstEmpty && secondEmpty) {
return 0;
}
if (firstEmpty) {
return 1;
}
if (secondEmpty) {
return -1;
}
VcsLogRefManager refManager1 = getRefManager(refs1);
VcsLogRefManager refManager2 = getRefManager(refs2);
if (!refManager1.equals(refManager2)) { // heads from different VCSs are not comparable => are considered equal for now
return 0;
}
Comparator<VcsRef> comparator = refManager1.getComparator();
Iterator<VcsRef> it1 = ContainerUtil.sorted(refs1, comparator).iterator();
Iterator<VcsRef> it2 = ContainerUtil.sorted(refs2, comparator).iterator();
while (it1.hasNext() && it2.hasNext()) {
VcsRef ref1 = it1.next();
VcsRef ref2 = it2.next();
int compare = comparator.compare(ref1, ref2);
if (compare != 0) {
return compare;
}
}
if (it1.hasNext()) {
return -1;
}
if (it2.hasNext()) {
return 1;
}
return 0;
}
@NotNull
private VcsLogRefManager getRefManager(@NotNull Collection<VcsRef> refs) {
return myRefManagers.get(refs.iterator().next().getRoot());
}
}
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