/*
* 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.codeInsight.editorActions.moveUpDown;
import com.intellij.lang.ASTNode;
import com.intellij.lang.DependentLanguage;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.editor.Caret;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiDocumentManager;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.util.PsiUtilBase;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import consulo.annotations.RequiredWriteAction;
/**
* @author Dennis.Ushakov
*/
public abstract class BaseMoveHandler extends EditorWriteActionHandler {
protected final boolean isDown;
public BaseMoveHandler(boolean down) {
super(true);
isDown = down;
}
@RequiredWriteAction
@Override
public void executeWriteAction(Editor editor, Caret caret, DataContext dataContext) {
final Project project = editor.getProject();
assert project != null;
final PsiDocumentManager documentManager = PsiDocumentManager.getInstance(project);
final Document document = editor.getDocument();
PsiFile file = getRoot(documentManager.getPsiFile(document), editor);
if (file != null) {
final MoverWrapper mover = getSuitableMover(editor, file);
if (mover != null && mover.getInfo().toMove2 != null) {
LineRange range = mover.getInfo().toMove;
if ((range.startLine > 0 || isDown) && (range.endLine < document.getLineCount() || !isDown)) {
mover.move(editor, file);
}
}
}
}
@Override
public boolean isEnabledForCaret(@NotNull Editor editor, @NotNull Caret caret, DataContext dataContext) {
if (editor.isViewer() || editor.isOneLineMode()) return false;
final Project project = editor.getProject();
if (project == null || project.isDisposed()) return false;
return true;
}
@Nullable
protected abstract MoverWrapper getSuitableMover(@NotNull Editor editor, @NotNull PsiFile file);
@Nullable
private static PsiFile getRoot(final PsiFile file, final Editor editor) {
if (file == null) return null;
int offset = editor.getCaretModel().getOffset();
if (offset == editor.getDocument().getTextLength()) offset--;
if (offset<0) return null;
PsiElement leafElement = file.findElementAt(offset);
if (leafElement == null) return null;
if (leafElement.getLanguage() instanceof DependentLanguage) {
leafElement = file.getViewProvider().findElementAt(offset, file.getViewProvider().getBaseLanguage());
if (leafElement == null) return null;
}
ASTNode node = leafElement.getNode();
if (node == null) return null;
return (PsiFile)PsiUtilBase.getRoot(node).getPsi();
}
}