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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 import net.sourceforge.phpeclipse.ui.WebUI;
  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
  44                 IJavaEditorTextHover {
  45
  46         private IEditorPart fEditor;
  47
  48         private ICommand fCommand;
  49         {
  50                 ICommandManager commandManager = PlatformUI.getWorkbench()
  51                                 .getCommandSupport().getCommandManager();
  52                 // fCommand=
  53                 // commandManager.getCommand(PHPEditorActionDefinitionIds.SHOW_JAVADOC);
  54                 // if (!fCommand.isDefined())
  55                 fCommand = null;
  56         }
  57
  58         /*
  59          * @see IJavaEditorTextHover#setEditor(IEditorPart)
  60          */
  61         public void setEditor(IEditorPart editor) {
  62                 fEditor = editor;
  63         }
  64
  65         protected IEditorPart getEditor() {
  66                 return fEditor;
  67         }
  68
  69         // protected ICodeAssist getCodeAssist() {
  70         // if (fEditor != null) {
  71         // IEditorInput input= fEditor.getEditorInput();
  72         // if (input instanceof IClassFileEditorInput) {
  73         // IClassFileEditorInput cfeInput= (IClassFileEditorInput) input;
  74         // return cfeInput.getClassFile();
  75         // }
  76         //
  77         // IWorkingCopyManager manager=
  78         // PHPeclipsePlugin.getDefault().getWorkingCopyManager();
  79         // return manager.getWorkingCopy(input);
  80         // }
  81         //
  82         // return null;
  83         // }
  84
  85         /*
  86          * @see ITextHover#getHoverRegion(ITextViewer, int)
  87          */
  88         public IRegion getHoverRegion(ITextViewer textViewer, int offset) {
  89                 return JavaWordFinder.findWord(textViewer.getDocument(), offset);
  90         }
  91
  92         /*
  93          * @see ITextHover#getHoverInfo(ITextViewer, IRegion)
  94          */
  95         public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
  96
  97                 // ICodeAssist resolve= getCodeAssist();
  98                 // if (resolve != null) {
  99                 // try {
 100                 // IJavaElement[] result= null;
 101                 //
 102                 // synchronized (resolve) {
 103                 // result= resolve.codeSelect(hoverRegion.getOffset(),
 104                 // hoverRegion.getLength());
 105                 // }
 106                 //
 107                 // if (result == null)
 108                 // return null;
 109                 //
 110                 // int nResults= result.length;
 111                 // if (nResults == 0)
 112                 // return null;
 113                 //
 114                 // return getHoverInfo(result);
 115                 //
 116                 // } catch (JavaModelException x) {
 117                 // PHPeclipsePlugin.log(x.getStatus());
 118                 // }
 119                 // }
 120                 return null;
 121         }
 122
 123         /**
 124          * Provides hover information for the given Java elements.
 125          *
 126          * @return the hover information string
 127          * @since 2.1
 128          */
 129         protected String getHoverInfo(IJavaElement[] javaElements) {
 130                 return null;
 131         }
 132
 133         /*
 134          * @see ITextHoverExtension#getHoverControlCreator()
 135          * @since 3.0
 136          */
 137         public IInformationControlCreator getHoverControlCreator() {
 138                 return new IInformationControlCreator() {
 139                         public IInformationControl createInformationControl(Shell parent) {
 140                                 return new DefaultInformationControl(parent, SWT.NONE,
 141                                                 new HTMLTextPresenter(true),
 142                                                 getTooltipAffordanceString());
 143                         }
 144                 };
 145         }
 146
 147         /**
 148          * Returns the tool tip affordance string.
 149          *
 150          * @return the affordance string or <code>null</code> if disabled or no
 151          *         key binding is defined
 152          * @since 3.0
 153          */
 154         protected String getTooltipAffordanceString() {
 155                 if (!WebUI.getDefault().getPreferenceStore().getBoolean(
 156                                 PreferenceConstants.EDITOR_SHOW_TEXT_HOVER_AFFORDANCE))
 157                         return null;
 158
 159                 KeySequence[] sequences = getKeySequences();
 160                 if (sequences == null)
 161                         return null;
 162
 163                 String keySequence = sequences[0].format();
 164                 return JavaHoverMessages.getFormattedString(
 165                                 "JavaTextHover.makeStickyHint", keySequence); //$NON-NLS-1$
 166         }
 167
 168         /**
 169          * Returns the array of valid key sequence bindings for the show tool tip
 170          * description command.
 171          *
 172          * @return the array with the {@link KeySequence}s
 173          *
 174          * @since 3.0
 175          */
 176         private KeySequence[] getKeySequences() {
 177                 if (fCommand != null) {
 178                         List list = fCommand.getKeySequenceBindings();
 179                         if (!list.isEmpty()) {
 180                                 KeySequence[] keySequences = new KeySequence[list.size()];
 181                                 for (int i = 0; i < keySequences.length; i++) {
 182                                         keySequences[i] = ((IKeySequenceBinding) list.get(i))
 183                                                         .getKeySequence();
 184                                 }
 185                                 return keySequences;
 186                         }
 187                 }
 188                 return null;
 189         }
 190 }