/*******************************************************************************
 * Copyright (c) 2007 Michael Krkoska 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:
 *     Michael Krkoska - initial API and implementation
 *******************************************************************************/
package org.eclipse.jface.snippets.viewers;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ColumnPixelData;
import org.eclipse.jface.viewers.IFontProvider;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.StyleRangeLabelProvider;
import org.eclipse.jface.viewers.TableLayout;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TableColumn;

/**
 * A simple TableViewer using a StyleRangeLabelProvider to color a part of the label.
 * 
 * @author Michael Krkoska <michael.krkoska@gmail.com>
 */
public class Snippet041StyleRangeProviderSimple {

   private static final Display DISPLAY   = Display.getDefault();
   private static final Color   GREEN     = DISPLAY.getSystemColor(SWT.COLOR_DARK_GREEN);
   private static final Image   IMAGE_BIG = DISPLAY.getSystemImage(SWT.ICON_WARNING);
   private static final Image   IMAGE     = new Image(DISPLAY, IMAGE_BIG.getImageData().scaledTo(16, 16));
   private static final Pattern BRACES    = Pattern.compile("\\(.*\\)");

   public static void main( String[] args ) {

      Shell shell = new Shell(DISPLAY, SWT.CLOSE);
      shell.setSize(300, 300);
      shell.setLayout(new GridLayout());

      Snippet041StyleRangeProviderSimple example = new Snippet041StyleRangeProviderSimple();
      example.createPartControl(shell);

      shell.open();

      while ( !shell.isDisposed() ) {
         if ( !DISPLAY.readAndDispatch() ) {
            DISPLAY.sleep();
         }
      }
      DISPLAY.dispose();
   }

   private TableViewer viewer;

   public void createPartControl( Composite parent ) {
   	// SWT.FULL_SELECTION is needed on win32 as long as Bug 168807 exists
      viewer = new TableViewer(parent, SWT.FULL_SELECTION); 

      GridData data = new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL | GridData.FILL_BOTH);
      viewer.getControl().setLayoutData(data);

      viewer.setContentProvider(new ArrayContentProvider());
      createColumns();

      viewer.setLabelProvider(new MyStyleRangeLabelProvider(new MyLabelProvider()));
//		viewer.setLabelProvider(new MyLabelProvider());

      StyleRangeLabelProvider.setUpOwnerDraw(viewer);

      String[] s = new String[10];
      for ( int i = 0; i < s.length; i++ ) {
         s[i] = "row " + i + " (green)";
      }
      viewer.setInput(s);
   }

   private void createColumns() {
      TableLayout layout = new TableLayout();
      viewer.getTable().setLayout(layout);
      viewer.getTable().setHeaderVisible(false);
      viewer.getTable().setLinesVisible(true);

      int width = 300 - 2 * 5 - viewer.getTable().getShell().computeTrim(0, 0, 0, 0).width;

      new TableColumn(viewer.getTable(), SWT.NONE);
      layout.addColumnData(new ColumnPixelData(width));
   }

   private final class MyLabelProvider extends LabelProvider implements IFontProvider {

      public Font getFont( Object element ) {
         return JFaceResources.getFont("Font");
      }

      public Image getImage( Object element ) {
//			if(element.toString().startsWith("row 1"))
//				return IMAGE_BIG;
         if ( !element.toString().startsWith("row 0") ) {
            return IMAGE;
         }
         return null;
      }

   }

   private final class MyStyleRangeLabelProvider extends StyleRangeLabelProvider {

      private MyStyleRangeLabelProvider( ILabelProvider labelProvider ) {
         super(labelProvider);
      }

      public StyleRange[] getStyleRanges( Object element, int columnIndex, String label ) {
         Matcher matcher = BRACES.matcher(label);
         if ( matcher.find() ) {
            StyleRange styleRange = new StyleRange(matcher.start(), matcher.end() - matcher.start(), null, null);
            styleRange.foreground = GREEN;
            return new StyleRange[] { styleRange };
         }
         return null;
      }
   }

}