archive/net.sourceforge.phpeclipse.js.ui/src/net/sourceforge/phpeclipse/js/ui/internal/text/JSCompletionProcessor.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2004 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 package net.sourceforge.phpeclipse.js.ui.internal.text;
  12
  13 import net.sourceforge.phpeclipse.ui.WebUI;
  14 import net.sourceforge.phpeclipse.ui.templates.template.BasicCompletionProcessor;
  15 import net.sourceforge.phpeclipse.ui.templates.template.JSContextType;
  16
  17 import org.eclipse.jface.text.BadLocationException;
  18 import org.eclipse.jface.text.IDocument;
  19 import org.eclipse.jface.text.IRegion;
  20 import org.eclipse.jface.text.ITextViewer;
  21 import org.eclipse.jface.text.templates.TemplateContextType;
  22
  23
  24 /**
  25  * A completion processor for XML templates.
  26  */
  27 public class JSCompletionProcessor extends BasicCompletionProcessor {
  28   /**
  29          * We watch for angular brackets since those are often part of XML
  30          * templates.
  31          */
  32         protected String extractPrefix(ITextViewer viewer, int offset) {
  33                 IDocument document= viewer.getDocument();
  34                 int i= offset;
  35                 if (i > document.getLength())
  36                         return ""; //$NON-NLS-1$
  37
  38                 try {
  39                         while (i > 0) {
  40                                 char ch= document.getChar(i - 1);
  41                                 if (!Character.isJavaIdentifierPart(ch))
  42                                         break;
  43                                 i--;
  44                         }
  45
  46                         return document.get(i, offset - i);
  47                 } catch (BadLocationException e) {
  48                         return ""; //$NON-NLS-1$
  49                 }
  50         }
  51         /**
  52          * Return the XML context type that is supported by this plugin.
  53          */
  54         protected TemplateContextType getContextType(ITextViewer viewer, IRegion region) {
  55                 return WebUI.getDefault().getContextTypeRegistry().getContextType(JSContextType.JS_CONTEXT_TYPE);
  56         }
  57
  58
  59 }