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     www.phpeclipse.de
  11 **********************************************************************/
  12 package net.sourceforge.phpdt.phphelp.actions;
  13
  14 import java.io.IOException;
  15 import java.text.MessageFormat;
  16
  17 import net.sourceforge.phpdt.phphelp.PHPHelpPlugin;
  18 import net.sourceforge.phpeclipse.phpeditor.PHPEditor;
  19 import net.sourceforge.phpeclipse.phpeditor.php.PHPWordExtractor;
  20
  21 import org.eclipse.jface.action.IAction;
  22 import org.eclipse.jface.preference.IPreferenceStore;
  23 import org.eclipse.jface.text.BadLocationException;
  24 import org.eclipse.jface.text.IDocument;
  25 import org.eclipse.jface.text.ITextSelection;
  26 import org.eclipse.jface.text.TextSelection;
  27 import org.eclipse.jface.viewers.ISelection;
  28 import org.eclipse.swt.graphics.Point;
  29 import org.eclipse.ui.IEditorActionDelegate;
  30 import org.eclipse.ui.IEditorPart;
  31 import org.eclipse.ui.IWorkbenchWindow;
  32 import org.eclipse.ui.actions.ActionDelegate;
  33 import org.eclipse.ui.help.WorkbenchHelp;
  34
  35 public class PHPEclipseShowContextHelp extends ActionDelegate implements IEditorActionDelegate {
  36
  37   private IWorkbenchWindow window;
  38   private PHPEditor editor;
  39
  40   public void dispose() {
  41   }
  42
  43   public void init(IWorkbenchWindow window) {
  44     this.window = window;
  45   }
  46
  47   public void selectionChanged(IAction action, ISelection selection) {
  48     if (!selection.isEmpty()) {
  49       if (selection instanceof TextSelection) {
  50         action.setEnabled(true);
  51       } else if (window.getActivePage() != null && window.getActivePage().getActivePart() != null) {
  52         //
  53       }
  54     }
  55   }
  56
  57   public void run(IAction action) {
  58     if (editor == null) {
  59       IEditorPart targetEditor = window.getActivePage().getActiveEditor();
  60       if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
  61         editor = (PHPEditor) targetEditor;
  62       }
  63     }
  64     if (editor != null) {
  65       ITextSelection selection = (ITextSelection) editor.getSelectionProvider().getSelection();
  66       IDocument doc = editor.getDocumentProvider().getDocument(editor.getEditorInput());
  67       int pos = selection.getOffset();
  68       String word = getFunctionName(doc, pos);
  69       openContextHelp(word);
  70
  71     }
  72   }
  73
  74   public void setActiveEditor(IAction action, IEditorPart targetEditor) {
  75     if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
  76       editor = (PHPEditor) targetEditor;
  77     }
  78   }
  79
  80   public static void openContextHelp(String word) {
  81     IPreferenceStore store = PHPHelpPlugin.getDefault().getPreferenceStore();
  82     if (store.getBoolean(PHPHelpPlugin.PHP_CHM_ENABLED)) {
  83       String[] arguments = { store.getString(PHPHelpPlugin.PHP_CHM_FILE), word };
  84       MessageFormat form = new MessageFormat(store.getString(PHPHelpPlugin.PHP_CHM_COMMAND));
  85       try {
  86         Runtime runtime = Runtime.getRuntime();
  87         String command = form.format(arguments);
  88
  89         runtime.exec(command);
  90       } catch (IOException e) {
  91       }
  92     } else {
  93 //      IHelp help = WorkbenchHelp.getHelpSupport();
  94 //      if (help != null) {
  95         PHPFunctionHelpResource helpResource = new PHPFunctionHelpResource(word);
  96         WorkbenchHelp.displayHelpResource(helpResource.getHref());
  97         //getHelpSupport().displayHelpResource(helpResource);
  98 //      } else {
  99         //   showMessage(shell, dialogTitle, ActionMessages.getString("Open help not available"), false); //$NON-NLS-1$
 100 //      }
 101     }
 102   }
 103
 104   private String getFunctionName(IDocument doc, int pos) {
 105     Point word = PHPWordExtractor.findWord(doc, pos);
 106     if (word != null) {
 107       try {
 108         return doc.get(word.x, word.y).replace('_', '-');
 109       } catch (BadLocationException e) {
 110       }
 111     }
 112     return "";
 113   }
 114 }