content: /*******************************************************************************
   * Copyright (c) 2000, 2008 IBM Corporation and others.
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  
  package org.eclipse.wst.jsdt.internal.ui.preferences.formatter;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Iterator;
  import java.util.Map;
  
  import org.eclipse.core.runtime.IStatus;
  import org.eclipse.core.runtime.Status;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.wst.jsdt.internal.corext.util.CodeFormatterUtil;
  import org.eclipse.wst.jsdt.internal.ui.IJavaStatusConstants;
  import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin;
  
  
  
  public class SnippetPreview extends JavaPreview {
    
      public final static class PreviewSnippet {
          
          public String header;
          public final String source;
          public final int kind;
          
          public PreviewSnippet(int kind, String source) {
              this.kind= kind;
              this.source= source;
          }
      }
      
      private ArrayList fSnippets;
  
      public SnippetPreview(Map workingValues, Composite parent) {
          super(workingValues, parent);
          fSnippets= new ArrayList();
      }
  
      protected void doFormatPreview() {
          if (fSnippets.isEmpty()) { 
              fPreviewDocument.set(""); //$NON-NLS-1$
              return;
          }
          
          //This delimiter looks best for invisible characters
          final String delimiter= "\n"; //$NON-NLS-1$
          
          final StringBuffer buffer= new StringBuffer();
          for (final Iterator iter= fSnippets.iterator(); iter.hasNext();) {
              final PreviewSnippet snippet= (PreviewSnippet) iter.next();
              String formattedSource;
              try {
                  formattedSource= CodeFormatterUtil.format(snippet.kind, snippet.source, 0, null, delimiter, fWorkingValues);
              } catch (Exception e) {
                  final IStatus status= new Status(IStatus.ERROR, JavaScriptPlugin.getPluginId(), IJavaStatusConstants.INTERNAL_ERROR, 
                      FormatterMessages.JavaPreview_formatter_exception, e); 
                  JavaScriptPlugin.log(status);
                  continue;
              }
              buffer.append(delimiter);            
              buffer.append(formattedSource);
              buffer.append(delimiter);            
              buffer.append(delimiter);
          }
          fPreviewDocument.set(buffer.toString());
      }
      
      
      
      public void add(PreviewSnippet snippet) {
          fSnippets.add(snippet);
      }
      
      public void remove(PreviewSnippet snippet) {
          fSnippets.remove(snippet);
      }
      
      public void addAll(Collection snippets) {
          fSnippets.addAll(snippets);
      }
      
      public void clear() {
          fSnippets.clear();
      }
  
  }
  