001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041: package org.netbeans.modules.gsfret.hints.infrastructure;
042:
043: import java.util.ArrayList;
044: import java.util.List;
045: import javax.swing.text.Document;
046: import org.netbeans.editor.BaseDocument;
047: import org.netbeans.modules.gsf.api.HintsProvider;
048: import org.netbeans.modules.gsf.Language;
049: import org.netbeans.modules.gsf.LanguageRegistry;
050: import org.netbeans.napi.gsfret.source.CompilationInfo;
051: import org.netbeans.napi.gsfret.source.support.CaretAwareSourceTaskFactory;
052: import org.netbeans.modules.gsfret.editor.semantic.ScanningCancellableTask;
053: import org.netbeans.spi.editor.hints.ErrorDescription;
054: import org.netbeans.spi.editor.hints.HintsController;
055:
056: /**
057: * Task which delegates to the language plugins for actual suggestions-computation
058: *
059: * @author Tor Norbye
060: */
061: public class SuggestionsTask extends
062: ScanningCancellableTask<CompilationInfo> {
063:
064: public SuggestionsTask() {
065: }
066:
067: static HintsProvider getHintsProvider(Document doc, int offset) {
068: BaseDocument baseDoc = (BaseDocument) doc;
069: List<Language> list = LanguageRegistry.getInstance()
070: .getEmbeddedLanguages(baseDoc, offset);
071: for (Language l : list) {
072: if (l.getHintsProvider() != null) {
073: return l.getHintsProvider();
074: }
075: }
076:
077: return null;
078: }
079:
080: public void run(CompilationInfo info) throws Exception {
081: resume();
082:
083: Document doc = info.getDocument();
084: if (doc == null) {
085: return;
086: }
087:
088: int pos = CaretAwareSourceTaskFactory.getLastPosition(info
089: .getFileObject());
090:
091: if (pos == -1) {
092: return;
093: }
094:
095: HintsProvider provider = getHintsProvider(doc, pos);
096:
097: if (provider == null) {
098: return;
099: }
100:
101: List<ErrorDescription> result = new ArrayList<ErrorDescription>();
102:
103: provider.computeSuggestions(info, result, pos);
104:
105: if (isCancelled()) {
106: return;
107: }
108:
109: HintsController.setErrors(info.getFileObject(),
110: SuggestionsTask.class.getName(), result);
111: }
112: }
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