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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.actions.PHPEditorActionDefinitionIds;
  21 import net.sourceforge.phpdt.ui.text.java.hover.IJavaEditorTextHover;
  22 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  23
  24 import org.eclipse.jface.text.DefaultInformationControl;
  25 import org.eclipse.jface.text.IInformationControl;
  26 import org.eclipse.jface.text.IInformationControlCreator;
  27 import org.eclipse.jface.text.IRegion;
  28 import org.eclipse.jface.text.ITextViewer;
  29 import org.eclipse.swt.SWT;
  30 import org.eclipse.swt.widgets.Shell;
  31 import org.eclipse.ui.IEditorPart;
  32 import org.eclipse.ui.PlatformUI;
  33 import org.eclipse.ui.commands.ICommand;
  34 import org.eclipse.ui.commands.ICommandManager;
  35 import org.eclipse.ui.commands.IKeySequenceBinding;
  36 import org.eclipse.ui.keys.KeySequence;
  37
  38 /**
  39  * Abstract class for providing hover information for Java elements.
  40  *
  41  * @since 2.1
  42  */
  43 public abstract class AbstractJavaEditorTextHover implements IJavaEditorTextHover {
  44
  45
  46         private IEditorPart fEditor;
  47         private ICommand fCommand;
  48         {
  49                 ICommandManager commandManager= PlatformUI.getWorkbench().getCommandSupport().getCommandManager();
  50 //              fCommand= commandManager.getCommand(PHPEditorActionDefinitionIds.SHOW_JAVADOC);
  51 //              if (!fCommand.isDefined())
  52                         fCommand= null;
  53         }
  54
  55         /*
  56          * @see IJavaEditorTextHover#setEditor(IEditorPart)
  57          */
  58         public void setEditor(IEditorPart editor) {
  59                 fEditor= editor;
  60         }
  61
  62         protected IEditorPart getEditor() {
  63                 return fEditor;
  64         }
  65
  66 //      protected ICodeAssist getCodeAssist() {
  67 //              if (fEditor != null) {
  68 //                      IEditorInput input= fEditor.getEditorInput();
  69 //                      if (input instanceof IClassFileEditorInput) {
  70 //                              IClassFileEditorInput cfeInput= (IClassFileEditorInput) input;
  71 //                              return cfeInput.getClassFile();
  72 //                      }
  73 //
  74 //                      IWorkingCopyManager manager= PHPeclipsePlugin.getDefault().getWorkingCopyManager();
  75 //                      return manager.getWorkingCopy(input);
  76 //              }
  77 //
  78 //              return null;
  79 //      }
  80
  81         /*
  82          * @see ITextHover#getHoverRegion(ITextViewer, int)
  83          */
  84         public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
  85                 return JavaWordFinder.findWord(textViewer.getDocument(), offset);
  86         }
  87
  88         /*
  89          * @see ITextHover#getHoverInfo(ITextViewer, IRegion)
  90          */
  91         public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
  92
  93 //              ICodeAssist resolve= getCodeAssist();
  94 //              if (resolve != null) {
  95 //                      try {
  96 //                              IJavaElement[] result= null;
  97 //
  98 //                              synchronized (resolve) {
  99 //                                      result= resolve.codeSelect(hoverRegion.getOffset(), hoverRegion.getLength());
 100 //                              }
 101 //
 102 //                              if (result == null)
 103 //                                      return null;
 104 //
 105 //                              int nResults= result.length;
 106 //                              if (nResults == 0)
 107 //                                      return null;
 108 //
 109 //                              return getHoverInfo(result);
 110 //
 111 //                      } catch (JavaModelException x) {
 112 //                              PHPeclipsePlugin.log(x.getStatus());
 113 //                      }
 114 //              }
 115                 return null;
 116         }
 117
 118         /**
 119          * Provides hover information for the given Java elements.
 120          *
 121          * @return the hover information string
 122          * @since 2.1
 123          */
 124         protected String getHoverInfo(IJavaElement[] javaElements) {
 125                 return null;
 126         }
 127         /*
 128          * @see ITextHoverExtension#getHoverControlCreator()
 129          * @since 3.0
 130          */
 131         public IInformationControlCreator getHoverControlCreator() {
 132                 return new IInformationControlCreator() {
 133                         public IInformationControl createInformationControl(Shell parent) {
 134                                 return new DefaultInformationControl(parent, SWT.NONE, new HTMLTextPresenter(true), getTooltipAffordanceString());
 135                         }
 136                 };
 137         }
 138
 139         /**
 140          * Returns the tool tip affordance string.
 141          *
 142          * @return the affordance string or <code>null</code> if disabled or no key binding is defined
 143          * @since 3.0
 144          */
 145         protected String getTooltipAffordanceString() {
 146                 if (!PHPeclipsePlugin.getDefault().getPreferenceStore().getBoolean(PreferenceConstants.EDITOR_SHOW_TEXT_HOVER_AFFORDANCE))
 147                         return null;
 148
 149                 KeySequence[] sequences= getKeySequences();
 150                 if (sequences == null)
 151                         return null;
 152
 153                 String keySequence= sequences[0].format();
 154                 return JavaHoverMessages.getFormattedString("JavaTextHover.makeStickyHint", keySequence); //$NON-NLS-1$
 155         }
 156
 157         /**
 158          * Returns the array of valid key sequence bindings for the
 159          * show tool tip description command.
 160          *
 161          * @return the array with the {@link KeySequence}s
 162          *
 163          * @since 3.0
 164          */
 165         private KeySequence[] getKeySequences() {
 166                 if (fCommand != null) {
 167                         List list= fCommand.getKeySequenceBindings();
 168                         if (!list.isEmpty()) {
 169                                 KeySequence[] keySequences= new KeySequence[list.size()];
 170                                 for (int i= 0; i < keySequences.length; i++) {
 171                                         keySequences[i]= ((IKeySequenceBinding) list.get(i)).getKeySequence();
 172                                 }
 173                                 return keySequences;
 174                         }
 175                 }
 176                 return null;
 177         }
 178 }