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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.
*/
/*
* Created by IntelliJ IDEA.
* User: max
* Date: May 13, 2002
* Time: 10:29:01 PM
*/
package com.intellij.openapi.editor.actions;
import com.intellij.codeStyle.CodeStyleFacade;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.actionSystem.Presentation;
import com.intellij.openapi.editor.*;
import com.intellij.openapi.editor.actionSystem.EditorAction;
import com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler;
import com.intellij.openapi.editor.ex.DocumentEx;
import com.intellij.openapi.fileEditor.FileDocumentManager;
import com.intellij.openapi.fileTypes.FileType;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiDocumentManager;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.util.text.CharArrayUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.ArrayList;
import java.util.List;
public class IndentSelectionAction extends EditorAction {
public IndentSelectionAction() {
super(new Handler());
}
private static class Handler extends EditorWriteActionHandler {
public Handler() {
super(true);
}
@Override
public void executeWriteAction(Editor editor, @Nullable Caret caret, DataContext dataContext) {
Project project = CommonDataKeys.PROJECT.getData(dataContext);
if (isEnabled(editor, caret, dataContext)) {
indentSelection(editor, project);
}
}
}
@Override
public void update(Editor editor, Presentation presentation, DataContext dataContext) {
presentation.setEnabled(originalIsEnabled(editor, true));
}
@Override
public void updateForKeyboardAccess(Editor editor, Presentation presentation, DataContext dataContext) {
presentation.setEnabled(isEnabled(editor, dataContext));
}
protected boolean isEnabled(Editor editor, DataContext dataContext) {
return originalIsEnabled(editor, true);
}
protected static boolean originalIsEnabled(Editor editor, boolean wantSelection) {
return (!wantSelection || hasSuitableSelection(editor)) && !editor.isOneLineMode();
}
/**
* Returns true if there is a selection in the editor and it contains at least one non-whitespace character
*/
private static boolean hasSuitableSelection(Editor editor) {
if (!editor.getSelectionModel().hasSelection()) {
return false;
}
Document document = editor.getDocument();
int selectionStart = editor.getSelectionModel().getSelectionStart();
int selectionEnd = editor.getSelectionModel().getSelectionEnd();
return !CharArrayUtil.containsOnlyWhiteSpaces(document.getCharsSequence().subSequence(selectionStart, selectionEnd));
}
private static void indentSelection(Editor editor, Project project) {
int oldSelectionStart = editor.getSelectionModel().getSelectionStart();
int oldSelectionEnd = editor.getSelectionModel().getSelectionEnd();
if(!editor.getSelectionModel().hasSelection()) {
oldSelectionStart = editor.getCaretModel().getOffset();
oldSelectionEnd = oldSelectionStart;
}
Document document = editor.getDocument();
int startIndex = document.getLineNumber(oldSelectionStart);
if(startIndex == -1) {
startIndex = document.getLineCount() - 1;
}
int endIndex = document.getLineNumber(oldSelectionEnd);
if(endIndex > 0 && document.getLineStartOffset(endIndex) == oldSelectionEnd && editor.getSelectionModel().hasSelection()) {
endIndex --;
}
if(endIndex == -1) {
endIndex = document.getLineCount() - 1;
}
VirtualFile vFile = FileDocumentManager.getInstance().getFile(document);
final FileType fileType = vFile == null ? null : vFile.getFileType();
int blockIndent = CodeStyleFacade.getInstance(project).getIndentSize(fileType);
doIndent(endIndex, startIndex, document, project, editor, blockIndent);
}
static void doIndent(final int endIndex, final int startIndex, final Document document, final Project project, final Editor editor,
final int blockIndent) {
boolean bulkMode = endIndex - startIndex > 50;
if (bulkMode) ((DocumentEx)document).setInBulkUpdate(true);
try {
List<Integer> nonModifiableLines = new ArrayList<Integer>();
if (project != null) {
PsiFile file = PsiDocumentManager.getInstance(project).getPsiFile(document);
IndentStrategy indentStrategy = LanguageIndentStrategy.getIndentStrategy(file);
if (!LanguageIndentStrategy.isDefault(indentStrategy)) {
for (int i = startIndex; i <= endIndex; i++) {
if (!canIndent(document, file, i, indentStrategy)) {
nonModifiableLines.add(i);
}
}
}
}
for(int i=startIndex; i<=endIndex; i++) {
if (!nonModifiableLines.contains(i)) {
EditorActionUtil.indentLine(project, editor, i, blockIndent);
}
}
}
finally {
if (bulkMode) ((DocumentEx)document).setInBulkUpdate(false);
}
}
static boolean canIndent(Document document, PsiFile file, int line, @NotNull IndentStrategy indentStrategy) {
int offset = document.getLineStartOffset(line);
if (file != null) {
PsiElement element = file.findElementAt(offset);
if (element != null) {
return indentStrategy.canIndent(element);
}
}
return true;
}
}
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