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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11
  12 package net.sourceforge.phpdt.internal.ui.text.java.hover;
  13
  14 import java.util.List;
  15
  16 import net.sourceforge.phpdt.core.IJavaElement;
  17 import net.sourceforge.phpdt.internal.ui.text.HTMLTextPresenter;
  18 import net.sourceforge.phpdt.internal.ui.text.JavaWordFinder;
  19 import net.sourceforge.phpdt.ui.PreferenceConstants;
  20 import net.sourceforge.phpdt.ui.text.java.hover.IJavaEditorTextHover;
  21 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  22
  23 import org.eclipse.jface.text.DefaultInformationControl;
  24 import org.eclipse.jface.text.IInformationControl;
  25 import org.eclipse.jface.text.IInformationControlCreator;
  26 import org.eclipse.jface.text.IRegion;
  27 import org.eclipse.jface.text.ITextViewer;
  28 import org.eclipse.swt.SWT;
  29 import org.eclipse.swt.widgets.Shell;
  30 import org.eclipse.ui.IEditorPart;
  31 import org.eclipse.ui.PlatformUI;
  32 import org.eclipse.ui.commands.ICommand;
  33 import org.eclipse.ui.commands.ICommandManager;
  34 import org.eclipse.ui.commands.IKeySequenceBinding;
  35 import org.eclipse.ui.keys.KeySequence;
  36
  37 /**
  38  * Abstract class for providing hover information for Java elements.
  39  *
  40  * @since 2.1
  41  */
  42 public abstract class AbstractJavaEditorTextHover implements IJavaEditorTextHover {
  43
  44
  45         private IEditorPart fEditor;
  46         private ICommand fCommand;
  47         {
  48                 ICommandManager commandManager= PlatformUI.getWorkbench().getCommandSupport().getCommandManager();
  49 //              fCommand= commandManager.getCommand(PHPEditorActionDefinitionIds.SHOW_JAVADOC);
  50 //              if (!fCommand.isDefined())
  51                         fCommand= null;
  52         }
  53
  54         /*
  55          * @see IJavaEditorTextHover#setEditor(IEditorPart)
  56          */
  57         public void setEditor(IEditorPart editor) {
  58                 fEditor= editor;
  59         }
  60
  61         protected IEditorPart getEditor() {
  62                 return fEditor;
  63         }
  64
  65 //      protected ICodeAssist getCodeAssist() {
  66 //              if (fEditor != null) {
  67 //                      IEditorInput input= fEditor.getEditorInput();
  68 //                      if (input instanceof IClassFileEditorInput) {
  69 //                              IClassFileEditorInput cfeInput= (IClassFileEditorInput) input;
  70 //                              return cfeInput.getClassFile();
  71 //                      }
  72 //
  73 //                      IWorkingCopyManager manager= PHPeclipsePlugin.getDefault().getWorkingCopyManager();
  74 //                      return manager.getWorkingCopy(input);
  75 //              }
  76 //
  77 //              return null;
  78 //      }
  79
  80         /*
  81          * @see ITextHover#getHoverRegion(ITextViewer, int)
  82          */
  83         public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
  84                 return JavaWordFinder.findWord(textViewer.getDocument(), offset);
  85         }
  86
  87         /*
  88          * @see ITextHover#getHoverInfo(ITextViewer, IRegion)
  89          */
  90         public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
  91
  92 //              ICodeAssist resolve= getCodeAssist();
  93 //              if (resolve != null) {
  94 //                      try {
  95 //                              IJavaElement[] result= null;
  96 //
  97 //                              synchronized (resolve) {
  98 //                                      result= resolve.codeSelect(hoverRegion.getOffset(), hoverRegion.getLength());
  99 //                              }
 100 //
 101 //                              if (result == null)
 102 //                                      return null;
 103 //
 104 //                              int nResults= result.length;
 105 //                              if (nResults == 0)
 106 //                                      return null;
 107 //
 108 //                              return getHoverInfo(result);
 109 //
 110 //                      } catch (JavaModelException x) {
 111 //                              PHPeclipsePlugin.log(x.getStatus());
 112 //                      }
 113 //              }
 114                 return null;
 115         }
 116
 117         /**
 118          * Provides hover information for the given Java elements.
 119          *
 120          * @return the hover information string
 121          * @since 2.1
 122          */
 123         protected String getHoverInfo(IJavaElement[] javaElements) {
 124                 return null;
 125         }
 126         /*
 127          * @see ITextHoverExtension#getHoverControlCreator()
 128          * @since 3.0
 129          */
 130         public IInformationControlCreator getHoverControlCreator() {
 131                 return new IInformationControlCreator() {
 132                         public IInformationControl createInformationControl(Shell parent) {
 133                                 return new DefaultInformationControl(parent, SWT.NONE, new HTMLTextPresenter(true), getTooltipAffordanceString());
 134                         }
 135                 };
 136         }
 137
 138         /**
 139          * Returns the tool tip affordance string.
 140          *
 141          * @return the affordance string or <code>null</code> if disabled or no key binding is defined
 142          * @since 3.0
 143          */
 144         protected String getTooltipAffordanceString() {
 145                 if (!PHPeclipsePlugin.getDefault().getPreferenceStore().getBoolean(PreferenceConstants.EDITOR_SHOW_TEXT_HOVER_AFFORDANCE))
 146                         return null;
 147
 148                 KeySequence[] sequences= getKeySequences();
 149                 if (sequences == null)
 150                         return null;
 151
 152                 String keySequence= sequences[0].format();
 153                 return JavaHoverMessages.getFormattedString("JavaTextHover.makeStickyHint", keySequence); //$NON-NLS-1$
 154         }
 155
 156         /**
 157          * Returns the array of valid key sequence bindings for the
 158          * show tool tip description command.
 159          *
 160          * @return the array with the {@link KeySequence}s
 161          *
 162          * @since 3.0
 163          */
 164         private KeySequence[] getKeySequences() {
 165                 if (fCommand != null) {
 166                         List list= fCommand.getKeySequenceBindings();
 167                         if (!list.isEmpty()) {
 168                                 KeySequence[] keySequences= new KeySequence[list.size()];
 169                                 for (int i= 0; i < keySequences.length; i++) {
 170                                         keySequences[i]= ((IKeySequenceBinding) list.get(i)).getKeySequence();
 171                                 }
 172                                 return keySequences;
 173                         }
 174                 }
 175                 return null;
 176         }
 177 }