net.sourceforge.phpeclipse.phphelp/src/net/sourceforge/phpdt/phphelp/actions/PHPEclipseShowContextHelp.java

   1 /**********************************************************************
   2 Copyright (c) 2000, 2002 IBM Corp. 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 implementation
  10     Klaus Hartlage - www.eclipseproject.de
  11 **********************************************************************/
  12 package net.sourceforge.phpdt.phphelp.actions;
  13
  14 import net.sourceforge.phpeclipse.phpeditor.PHPEditor;
  15 import net.sourceforge.phpeclipse.phpeditor.php.PHPWordExtractor;
  16 import org.eclipse.help.IHelp;
  17 import org.eclipse.help.IHelpResource;
  18 import org.eclipse.jface.action.IAction;
  19 import org.eclipse.jface.text.BadLocationException;
  20 import org.eclipse.jface.text.IDocument;
  21 import org.eclipse.jface.text.ITextSelection;
  22 import org.eclipse.jface.text.TextSelection;
  23 import org.eclipse.jface.viewers.ISelection;
  24 import org.eclipse.swt.graphics.Point;
  25 import org.eclipse.ui.IEditorActionDelegate;
  26 import org.eclipse.ui.IEditorPart;
  27 import org.eclipse.ui.IWorkbenchWindow;
  28 import org.eclipse.ui.actions.ActionDelegate;
  29 import org.eclipse.ui.help.WorkbenchHelp;
  30
  31 public class PHPEclipseShowContextHelp extends ActionDelegate implements IEditorActionDelegate {
  32
  33   private IWorkbenchWindow window;
  34   private PHPEditor editor;
  35
  36   public void dispose() {
  37   }
  38
  39   public void init(IWorkbenchWindow window) {
  40     this.window = window;
  41   }
  42
  43   public void selectionChanged(IAction action, ISelection selection) {
  44     if (!selection.isEmpty()) {
  45       if (selection instanceof TextSelection) {
  46         action.setEnabled(true);
  47       } else if (window.getActivePage() != null && window.getActivePage().getActivePart() != null) {
  48         //
  49       }
  50     }
  51   }
  52
  53   public void run(IAction action) {
  54     if (editor == null) {
  55       IEditorPart targetEditor = window.getActivePage().getActiveEditor();
  56       if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
  57         editor = (PHPEditor) targetEditor;
  58       }
  59     }
  60     if (editor != null) {
  61       ITextSelection selection = (ITextSelection) editor.getSelectionProvider().getSelection();
  62       IDocument doc = editor.getDocumentProvider().getDocument(editor.getEditorInput());
  63       int pos = selection.getOffset();
  64       String word = getFunctionName(doc, pos);
  65       openContextHelp(word);
  66
  67     }
  68   }
  69
  70   public void setActiveEditor(IAction action, IEditorPart targetEditor) {
  71     if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
  72       editor = (PHPEditor) targetEditor;
  73     }
  74   }
  75
  76   public static void openContextHelp(String word) {
  77     IHelp help = WorkbenchHelp.getHelpSupport();
  78     if (help != null) {
  79       IHelpResource helpResource = new PHPFunctionHelpResource(word);
  80       WorkbenchHelp.getHelpSupport().displayHelpResource(helpResource);
  81     } else {
  82       //   showMessage(shell, dialogTitle, ActionMessages.getString("Open help not available"), false); //$NON-NLS-1$
  83     }
  84   }
  85
  86   private String getFunctionName(IDocument doc, int pos) {
  87     Point word = PHPWordExtractor.findWord(doc, pos);
  88     if (word != null) {
  89       try {
  90         return doc.get(word.x, word.y).replace('_', '-');
  91       } catch (BadLocationException e) {
  92       }
  93     }
  94     return "";
  95   }
  96 }