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
  34 public class PHPEclipseShowContextHelp extends ActionDelegate implements
  35                 IEditorActionDelegate {
  36
  37         private IWorkbenchWindow window;
  38
  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
  53                                         && window.getActivePage().getActivePart() != null) {
  54                                 //
  55                         }
  56                 }
  57         }
  58
  59         public void run(IAction action) {
  60                 if (editor == null) {
  61                         IEditorPart targetEditor = window.getActivePage().getActiveEditor();
  62                         if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
  63                                 editor = (PHPEditor) targetEditor;
  64                         }
  65                 }
  66                 if (editor != null) {
  67                         ITextSelection selection = (ITextSelection) editor
  68                                         .getSelectionProvider().getSelection();
  69                         IDocument doc = editor.getDocumentProvider().getDocument(
  70                                         editor.getEditorInput());
  71                         if (null == window) {
  72                                 window = editor.getSite().getWorkbenchWindow();
  73                         }
  74                         int pos = selection.getOffset();
  75                         String word = getFunctionName(doc, pos);
  76                         openContextHelp(word);
  77                 }
  78         }
  79
  80         public void setActiveEditor(IAction action, IEditorPart targetEditor) {
  81                 if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
  82                         editor = (PHPEditor) targetEditor;
  83                 }
  84         }
  85
  86         public void openContextHelp(String word) {
  87                 IPreferenceStore store = PHPHelpPlugin.getDefault()
  88                                 .getPreferenceStore();
  89                 if (store.getBoolean(PHPHelpPlugin.PHP_CHM_ENABLED)) {
  90                         String[] arguments = { store.getString(PHPHelpPlugin.PHP_CHM_FILE),
  91                                         word };
  92                         MessageFormat form = new MessageFormat(store
  93                                         .getString(PHPHelpPlugin.PHP_CHM_COMMAND));
  94                         try {
  95                                 Runtime runtime = Runtime.getRuntime();
  96                                 String command = form.format(arguments);
  97
  98                                 runtime.exec(command);
  99                         } catch (IOException e) {
 100                         }
 101                 } else {
 102                         PHPFunctionHelpResource helpResource = new PHPFunctionHelpResource(
 103                                         word);
 104                         window.getWorkbench().getHelpSystem().displayHelpResource(
 105                                         helpResource.getHref());
 106                 }
 107         }
 108
 109         private String getFunctionName(IDocument doc, int pos) {
 110                 Point word = PHPWordExtractor.findWord(doc, pos);
 111                 if (word != null) {
 112                         try {
 113                                 return doc.get(word.x, word.y).replace('_', '-');
 114                         } catch (BadLocationException e) {
 115                         }
 116                 }
 117                 return "";
 118         }
 119 }