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 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.help.IHelp;
  22 import org.eclipse.jface.action.IAction;
  23 import org.eclipse.jface.preference.IPreferenceStore;
  24 import org.eclipse.jface.text.BadLocationException;
  25 import org.eclipse.jface.text.IDocument;
  26 import org.eclipse.jface.text.ITextSelection;
  27 import org.eclipse.jface.text.TextSelection;
  28 import org.eclipse.jface.viewers.ISelection;
  29 import org.eclipse.swt.graphics.Point;
  30 import org.eclipse.ui.IEditorActionDelegate;
  31 import org.eclipse.ui.IEditorPart;
  32 import org.eclipse.ui.IWorkbenchWindow;
  33 import org.eclipse.ui.actions.ActionDelegate;
  34 import org.eclipse.ui.help.WorkbenchHelp;
  35
  36 public class PHPEclipseShowContextHelp extends ActionDelegate implements IEditorActionDelegate {
  37
  38   private IWorkbenchWindow window;
  39   private PHPEditor editor;
  40
  41   public void dispose() {
  42   }
  43
  44   public void init(IWorkbenchWindow window) {
  45     this.window = window;
  46   }
  47
  48   public void selectionChanged(IAction action, ISelection selection) {
  49     if (!selection.isEmpty()) {
  50       if (selection instanceof TextSelection) {
  51         action.setEnabled(true);
  52       } else if (window.getActivePage() != null && window.getActivePage().getActivePart() != null) {
  53         //
  54       }
  55     }
  56   }
  57
  58   public void run(IAction action) {
  59     if (editor == null) {
  60       IEditorPart targetEditor = window.getActivePage().getActiveEditor();
  61       if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
  62         editor = (PHPEditor) targetEditor;
  63       }
  64     }
  65     if (editor != null) {
  66       ITextSelection selection = (ITextSelection) editor.getSelectionProvider().getSelection();
  67       IDocument doc = editor.getDocumentProvider().getDocument(editor.getEditorInput());
  68       int pos = selection.getOffset();
  69       String word = getFunctionName(doc, pos);
  70       openContextHelp(word);
  71
  72     }
  73   }
  74
  75   public void setActiveEditor(IAction action, IEditorPart targetEditor) {
  76     if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
  77       editor = (PHPEditor) targetEditor;
  78     }
  79   }
  80
  81   public static void openContextHelp(String word) {
  82     IPreferenceStore store = PHPHelpPlugin.getDefault().getPreferenceStore();
  83     if (store.getBoolean(PHPHelpPlugin.PHP_CHM_ENABLED)) {
  84       String[] arguments = { store.getString(PHPHelpPlugin.PHP_CHM_FILE), word };
  85       MessageFormat form = new MessageFormat(store.getString(PHPHelpPlugin.PHP_CHM_COMMAND));
  86       try {
  87         Runtime runtime = Runtime.getRuntime();
  88         String command = form.format(arguments);
  89
  90         runtime.exec(command);
  91       } catch (IOException e) {
  92       }
  93     } else {
  94       IHelp help = WorkbenchHelp.getHelpSupport();
  95       if (help != null) {
  96         PHPFunctionHelpResource helpResource = new PHPFunctionHelpResource(word);
  97         WorkbenchHelp.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 }