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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.openapi.progress.util;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.application.Application;
import com.intellij.openapi.application.ApplicationAdapter;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.progress.ProcessCanceledException;
import com.intellij.openapi.progress.ProgressIndicator;
import com.intellij.openapi.progress.ProgressManager;
import org.jetbrains.annotations.NotNull;
/**
* @author gregsh
*/
public class ProgressIndicatorUtils {
private ProgressIndicatorUtils() {
}
@NotNull
public static ProgressIndicator forceWriteActionPriority(@NotNull final ProgressIndicator progress, @NotNull final Disposable builder) {
ApplicationManager.getApplication().addApplicationListener(new ApplicationAdapter() {
@Override
public void beforeWriteActionStart(Object action) {
if (progress.isRunning()) {
progress.cancel();
}
}
}, builder);
return progress;
}
public static void runWithWriteActionPriority(@NotNull final Runnable action) {
runWithWriteActionPriority(new ReadTask() {
@Override
public void computeInReadAction(@NotNull ProgressIndicator indicator) {
action.run();
}
@Override
public void onCanceled(@NotNull ProgressIndicator indicator) {
}
});
}
public static void runWithWriteActionPriority(@NotNull final ReadTask task) {
runWithWriteActionPriority(new ProgressIndicatorBase(), task);
}
private static void surroundWithListener(@NotNull final ProgressIndicator progressIndicator, @NotNull Runnable runnable) {
final ApplicationAdapter listener = new ApplicationAdapter() {
@Override
public void beforeWriteActionStart(Object action) {
progressIndicator.cancel();
}
};
final Application application = ApplicationManager.getApplication();
application.addApplicationListener(listener);
try {
runnable.run();
}
finally {
application.removeApplicationListener(listener);
}
}
public static void runWithWriteActionPriority(@NotNull final ProgressIndicator progressIndicator, @NotNull final ReadTask task) {
surroundWithListener(progressIndicator, new Runnable() {
@Override
public void run() {
runUnderProgress(progressIndicator, task);
}
});
}
private static void runUnderProgress(@NotNull final ProgressIndicator progressIndicator, @NotNull final ReadTask task) {
ProgressManager.getInstance().runProcess(new Runnable() {
@Override
public void run() {
// This read action can possible last for a long time, we want it to stop immediately on the first write access.
// For this purpose we launch it under empty progress and invoke progressIndicator#cancel on write access to avoid possible write lock delays.
try {
ApplicationManager.getApplication().runReadAction(new Runnable() {
@Override
public void run() {
task.computeInReadAction(progressIndicator);
}
});
}
catch (ProcessCanceledException ignore) {
}
finally {
if (progressIndicator.isCanceled()) {
task.onCanceled(progressIndicator);
}
}
}
}, progressIndicator);
}
public static void scheduleWithWriteActionPriority(@NotNull final ReadTask task) {
scheduleWithWriteActionPriority(new ProgressIndicatorBase(), task);
}
public static void scheduleWithWriteActionPriority(@NotNull final ProgressIndicator indicator, @NotNull final ReadTask task) {
// we have to attach listeners in EDT to avoid "fire write action started while attach listeners from another thread" race condition
ApplicationManager.getApplication().invokeLater(new Runnable() {
@Override
public void run() {
surroundWithListener(indicator, new Runnable() {
@Override
public void run() {
ApplicationManager.getApplication().executeOnPooledThread(new Runnable() {
@Override
public void run() {
runUnderProgress(indicator, task);
}
});
}
});
}
});
}
}
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