case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/javaeditor/NLSKeyHyperlinkDetector.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2009 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11
  12 package org.eclipse.jdt.internal.ui.javaeditor;
  13
  14 import org.eclipse.jface.text.IRegion;
  15 import org.eclipse.jface.text.ITextViewer;
  16 import org.eclipse.jface.text.Region;
  17 import org.eclipse.jface.text.hyperlink.AbstractHyperlinkDetector;
  18 import org.eclipse.jface.text.hyperlink.IHyperlink;
  19
  20 import org.eclipse.ui.IEditorSite;
  21
  22 import org.eclipse.ui.texteditor.ITextEditor;
  23
  24 import org.eclipse.jdt.core.ITypeRoot;
  25 import org.eclipse.jdt.core.dom.ASTNode;
  26 import org.eclipse.jdt.core.dom.CompilationUnit;
  27 import org.eclipse.jdt.core.dom.NodeFinder;
  28 import org.eclipse.jdt.core.dom.QualifiedName;
  29 import org.eclipse.jdt.core.dom.SimpleName;
  30 import org.eclipse.jdt.core.dom.StringLiteral;
  31
  32 import org.eclipse.jdt.internal.corext.refactoring.nls.AccessorClassReference;
  33 import org.eclipse.jdt.internal.corext.refactoring.nls.NLSHintHelper;
  34
  35 import org.eclipse.jdt.ui.JavaUI;
  36 import org.eclipse.jdt.ui.SharedASTProvider;
  37
  38
  39
  40 /**
  41  * NLS hyperlink detector.
  42  *
  43  * @since 3.1
  44  */
  45 public class NLSKeyHyperlinkDetector extends AbstractHyperlinkDetector {
  46
  47
  48         /*
  49          * @see org.eclipse.jface.text.hyperlink.IHyperlinkDetector#detectHyperlinks(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion, boolean)
  50          */
  51         public IHyperlink[] detectHyperlinks(ITextViewer textViewer, IRegion region, boolean canShowMultipleHyperlinks) {
  52                 ITextEditor textEditor= (ITextEditor)getAdapter(ITextEditor.class);
  53                 if (region == null || textEditor == null)
  54                         return null;
  55
  56                 IEditorSite site= textEditor.getEditorSite();
  57                 if (site == null)
  58                         return null;
  59
  60                 ITypeRoot javaElement= getInputJavaElement(textEditor);
  61                 if (javaElement == null)
  62                         return null;
  63
  64                 CompilationUnit ast= SharedASTProvider.getAST(javaElement, SharedASTProvider.WAIT_NO, null);
  65                 if (ast == null)
  66                         return null;
  67
  68                 ASTNode node= NodeFinder.perform(ast, region.getOffset(), 1);
  69                 if (!(node instanceof StringLiteral)  && !(node instanceof SimpleName))
  70                         return null;
  71
  72                 if (node.getLocationInParent() == QualifiedName.QUALIFIER_PROPERTY)
  73                         return null;
  74
  75                 IRegion nlsKeyRegion= new Region(node.getStartPosition(), node.getLength());
  76                 AccessorClassReference ref= NLSHintHelper.getAccessorClassReference(ast, nlsKeyRegion);
  77                 if (ref == null)
  78                         return null;
  79                 String keyName= null;
  80                 if (node instanceof StringLiteral) {
  81                         keyName= ((StringLiteral)node).getLiteralValue();
  82                 } else {
  83                         keyName= ((SimpleName)node).getIdentifier();
  84                 }
  85                 if (keyName != null)
  86                         return new IHyperlink[] {new NLSKeyHyperlink(nlsKeyRegion, keyName, ref, textEditor)};
  87
  88                 return null;
  89         }
  90
  91         private ITypeRoot getInputJavaElement(ITextEditor editor) {
  92                 return JavaUI.getEditorInputTypeRoot(editor.getEditorInput());
  93         }
  94
  95 }