| /* |
| * 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.lookup.impl; |
| |
| import com.intellij.codeInsight.completion.CompletionProgressIndicator; |
| import com.intellij.codeInsight.completion.impl.CompletionServiceImpl; |
| import com.intellij.codeInsight.lookup.LookupManager; |
| import com.intellij.openapi.actionSystem.DataContext; |
| import com.intellij.openapi.editor.Caret; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.editor.actionSystem.EditorActionHandler; |
| |
| public class BackspaceHandler extends EditorActionHandler { |
| private final EditorActionHandler myOriginalHandler; |
| |
| public BackspaceHandler(EditorActionHandler originalHandler){ |
| myOriginalHandler = originalHandler; |
| } |
| |
| @Override |
| public void doExecute(final Editor editor, Caret caret, final DataContext dataContext){ |
| LookupImpl lookup = (LookupImpl)LookupManager.getActiveLookup(editor); |
| if (lookup == null){ |
| myOriginalHandler.execute(editor, caret, dataContext); |
| return; |
| } |
| |
| int hideOffset = lookup.getLookupStart(); |
| int originalStart = lookup.getLookupOriginalStart(); |
| if (originalStart >= 0 && originalStart <= hideOffset) { |
| hideOffset = originalStart - 1; |
| } |
| |
| truncatePrefix(dataContext, lookup, myOriginalHandler, hideOffset, caret); |
| } |
| |
| static void truncatePrefix(final DataContext dataContext, |
| LookupImpl lookup, |
| final EditorActionHandler handler, |
| final int hideOffset, |
| final Caret caret) { |
| final Editor editor = lookup.getEditor(); |
| if (!lookup.performGuardedChange(new Runnable() { |
| @Override |
| public void run() { |
| handler.execute(editor, caret, dataContext); |
| } |
| })) { |
| return; |
| } |
| |
| final CompletionProgressIndicator process = CompletionServiceImpl.getCompletionService().getCurrentCompletion(); |
| if (lookup.truncatePrefix(process == null || !process.isAutopopupCompletion())) { |
| return; |
| } |
| |
| if (process != null) { |
| if (hideOffset < editor.getCaretModel().getOffset()) { |
| process.scheduleRestart(); |
| return; |
| } |
| process.prefixUpdated(); |
| } |
| |
| lookup.hide(); |
| } |
| } |