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/*
* Copyright 2000-2010 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.vcs.ex;
import com.intellij.icons.AllIcons;
import com.intellij.idea.ActionsBundle;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.command.CommandProcessor;
import com.intellij.openapi.editor.Caret;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.DumbAwareAction;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vcs.VcsBundle;
import com.intellij.openapi.vcs.impl.LineStatusTrackerManager;
import com.intellij.openapi.vfs.ReadonlyStatusHandler;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.List;
public class RollbackLineStatusAction extends DumbAwareAction {
public RollbackLineStatusAction() {
super(ActionsBundle.actionText("Vcs.RollbackChangedLines"),
ActionsBundle.actionDescription("Vcs.RollbackChangedLines"),
AllIcons.Actions.Reset);
}
@Override
public void update(AnActionEvent e) {
Project project = e.getProject();
if (project == null) {
e.getPresentation().setEnabled(false);
return;
}
Editor editor = CommonDataKeys.EDITOR.getData(e.getDataContext());
if (editor == null) {
e.getPresentation().setEnabled(false);
return;
}
LineStatusTracker tracker = LineStatusTrackerManager.getInstance(project).getLineStatusTracker(editor.getDocument());
if (tracker == null) {
e.getPresentation().setEnabled(false);
return;
}
e.getPresentation().setEnabled(true);
}
@Override
public void actionPerformed(AnActionEvent e) {
Project project = e.getProject();
Editor editor = CommonDataKeys.EDITOR.getData(e.getDataContext());
LineStatusTracker tracker = LineStatusTrackerManager.getInstance(project).getLineStatusTracker(editor.getDocument());
if (tracker == null) return;
rollback(tracker, editor, null);
}
protected static void rollback(@NotNull LineStatusTracker tracker, @Nullable Editor editor, @Nullable Range range) {
if (range != null) {
doRollback(tracker, range);
return;
}
if (editor == null) return;
Document document = editor.getDocument();
int totalLines = getLineCount(document);
SegmentTree lines = new SegmentTree(totalLines + 1);
List<Caret> carets = editor.getCaretModel().getAllCarets();
for (Caret caret : carets) {
if (caret.hasSelection()) {
int line1 = editor.offsetToLogicalPosition(caret.getSelectionStart()).line;
int line2 = editor.offsetToLogicalPosition(caret.getSelectionEnd()).line;
lines.mark(line1, line2 + 1);
if (caret.getSelectionEnd() == document.getTextLength()) lines.mark(totalLines);
}
else {
lines.mark(caret.getLogicalPosition().line);
if (caret.getOffset() == document.getTextLength()) lines.mark(totalLines);
}
}
doRollback(tracker, lines);
}
private static void doRollback(@NotNull final LineStatusTracker tracker, @NotNull final Range range) {
execute(tracker, new Runnable() {
@Override
public void run() {
tracker.rollbackChanges(range);
}
});
}
private static void doRollback(@NotNull final LineStatusTracker tracker, @NotNull final SegmentTree lines) {
execute(tracker, new Runnable() {
@Override
public void run() {
tracker.rollbackChanges(lines);
}
});
}
private static void execute(@NotNull final LineStatusTracker tracker, @NotNull final Runnable task) {
// TODO: is there possible data races?
CommandProcessor.getInstance().executeCommand(tracker.getProject(), new Runnable() {
public void run() {
ApplicationManager.getApplication().runWriteAction(new Runnable() {
public void run() {
if (!tracker.getDocument().isWritable()) {
final ReadonlyStatusHandler.OperationStatus operationStatus = ReadonlyStatusHandler
.getInstance(tracker.getProject()).ensureFilesWritable(tracker.getVirtualFile());
if (operationStatus.hasReadonlyFiles()) return;
}
task.run();
}
});
}
}, VcsBundle.message("command.name.rollback.change"), null);
}
private static int getLineCount(@NotNull Document document) {
return Math.max(document.getLineCount(), 1);
}
}
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