| /* |
| * 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.editor.actions; |
| |
| import com.intellij.openapi.actionSystem.DataContext; |
| import com.intellij.openapi.actionSystem.IdeActions; |
| import com.intellij.openapi.editor.Document; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.editor.SelectionModel; |
| import com.intellij.openapi.editor.actionSystem.EditorActionHandler; |
| import com.intellij.openapi.editor.actionSystem.EditorActionManager; |
| import com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler; |
| import com.intellij.openapi.util.text.StringUtil; |
| import com.intellij.util.text.CharArrayUtil; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * Works like a usual backspace except the situation when the caret is located after white space - all white space symbols |
| * (white spaces, tabulations, line feeds) are removed then. |
| * |
| * @author Denis Zhdanov |
| * @since 6/27/12 4:10 PM |
| */ |
| public class HungryBackspaceAction extends TextComponentEditorAction { |
| |
| public HungryBackspaceAction() { |
| super(new Handler()); |
| } |
| |
| private static class Handler extends EditorWriteActionHandler { |
| public Handler() { |
| super(true); |
| } |
| |
| @Override |
| public void executeWriteAction(@NotNull Editor editor, DataContext dataContext) { |
| final Document document = editor.getDocument(); |
| final int prevSymbolOffset = editor.getCaretModel().getOffset() - 1; |
| if (prevSymbolOffset < 0) { |
| return; |
| } |
| |
| final SelectionModel selectionModel = editor.getSelectionModel(); |
| final CharSequence text = document.getCharsSequence(); |
| final char c = text.charAt(prevSymbolOffset); |
| final boolean doHungryCheck = !selectionModel.hasSelection() && !selectionModel.hasBlockSelection() && StringUtil.isWhiteSpace(c); |
| final EditorActionHandler handler = EditorActionManager.getInstance().getActionHandler(IdeActions.ACTION_EDITOR_BACKSPACE); |
| handler.execute(editor, dataContext); |
| |
| if (!doHungryCheck) { |
| return; |
| } |
| |
| final int endOffset = prevSymbolOffset; |
| if (endOffset > document.getTextLength()) { |
| return; |
| } |
| int startOffset = CharArrayUtil.shiftBackward(text, endOffset - 1, "\t \n"); |
| if (startOffset < 0) { |
| // No non-white space symbol before the current caret offset has been found. |
| startOffset = 0; |
| } |
| else { |
| // Offset now points to the first non-white space symbol before the caret. |
| // Increment it to point to the first white space symbol instead. |
| startOffset++; |
| } |
| if (startOffset >= endOffset) { |
| return; |
| } |
| document.deleteString(startOffset, endOffset); |
| } |
| } |
| } |