/*
* Copyright 2000-2015 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.diff.tools.external;
import com.intellij.diff.DiffDialogHints;
import com.intellij.diff.DiffManagerEx;
import com.intellij.diff.chains.DiffRequestChain;
import com.intellij.diff.chains.DiffRequestProducer;
import com.intellij.diff.chains.DiffRequestProducerException;
import com.intellij.diff.chains.SimpleDiffRequestChain;
import com.intellij.diff.contents.DiffContent;
import com.intellij.diff.requests.ContentDiffRequest;
import com.intellij.diff.requests.DiffRequest;
import com.intellij.execution.ExecutionException;
import com.intellij.notification.Notification;
import com.intellij.notification.NotificationType;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.progress.ProcessCanceledException;
import com.intellij.openapi.progress.ProgressIndicator;
import com.intellij.openapi.progress.ProgressManager;
import com.intellij.openapi.progress.Task;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.Messages;
import com.intellij.openapi.util.Ref;
import com.intellij.openapi.util.UserDataHolderBase;
import com.intellij.openapi.util.text.StringUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class ExternalDiffTool {
public static final Logger LOG = Logger.getInstance(ExternalDiffTool.class);
public static boolean isDefault() {
return ExternalDiffSettings.getInstance().isDiffEnabled() && ExternalDiffSettings.getInstance().isDiffDefault();
}
public static boolean isEnabled() {
return ExternalDiffSettings.getInstance().isDiffEnabled();
}
public static void show(@Nullable final Project project,
@NotNull final DiffRequestChain chain,
@NotNull final DiffDialogHints hints) {
try {
//noinspection unchecked
final Ref<List<DiffRequest>> requestsRef = new Ref<List<DiffRequest>>();
final Ref<Throwable> exceptionRef = new Ref<Throwable>();
ProgressManager.getInstance().run(new Task.Modal(project, "Loading Requests", true) {
@Override
public void run(@NotNull ProgressIndicator indicator) {
try {
requestsRef.set(collectRequests(project, chain, indicator));
}
catch (Throwable e) {
exceptionRef.set(e);
}
}
});
if (!exceptionRef.isNull()) throw exceptionRef.get();
List<DiffRequest> showInBuiltin = new ArrayList<DiffRequest>();
for (DiffRequest request : requestsRef.get()) {
if (canShow(request)) {
showRequest(project, request);
}
else {
showInBuiltin.add(request);
}
}
if (!showInBuiltin.isEmpty()) {
DiffManagerEx.getInstance().showDiffBuiltin(project, new SimpleDiffRequestChain(showInBuiltin), hints);
}
}
catch (ProcessCanceledException ignore) {
}
catch (Throwable e) {
LOG.error(e);
Messages.showErrorDialog(project, e.getMessage(), "Can't Show Diff In External Tool");
}
}
@NotNull
private static List<DiffRequest> collectRequests(@Nullable Project project,
@NotNull final DiffRequestChain chain,
@NotNull ProgressIndicator indicator) {
List<DiffRequest> requests = new ArrayList<DiffRequest>();
UserDataHolderBase context = new UserDataHolderBase();
List<String> errorRequests = new ArrayList<String>();
// TODO: show all changes on explicit selection
List<? extends DiffRequestProducer> producers = Collections.singletonList(chain.getRequests().get(chain.getIndex()));
for (DiffRequestProducer producer : producers) {
try {
requests.add(producer.process(context, indicator));
}
catch (DiffRequestProducerException e) {
LOG.warn(e);
errorRequests.add(producer.getName());
}
}
if (!errorRequests.isEmpty()) {
new Notification("diff", "Can't load some changes", StringUtil.join(errorRequests, "<br>"), NotificationType.ERROR).notify(project);
}
return requests;
}
public static void showRequest(@Nullable Project project, @NotNull DiffRequest request)
throws ExecutionException, IOException {
request.onAssigned(true);
ExternalDiffSettings settings = ExternalDiffSettings.getInstance();
List<DiffContent> contents = ((ContentDiffRequest)request).getContents();
List<String> titles = ((ContentDiffRequest)request).getContentTitles();
ExternalDiffToolUtil.execute(settings, contents, titles, request.getTitle());
request.onAssigned(false);
}
public static boolean canShow(@NotNull DiffRequest request) {
if (!(request instanceof ContentDiffRequest)) return false;
List<DiffContent> contents = ((ContentDiffRequest)request).getContents();
if (contents.size() != 2 && contents.size() != 3) return false;
for (DiffContent content : contents) {
if (!ExternalDiffToolUtil.canCreateFile(content)) return false;
}
return true;
}
}