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   1 /*
   2  * Copyright (c) 2002-2004 Widespace, OU 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  *     Igor Malinin - initial contribution
  10  *
  11  * $Id: XMLMergeViewer.java,v 1.1 2004-09-02 18:28:05 jsurfer Exp $
  12  */
  13
  14 package net.sourceforge.phpeclipse.xml.ui.internal.compare;
  15
  16 import org.eclipse.compare.CompareConfiguration;
  17 import org.eclipse.compare.contentmergeviewer.TextMergeViewer;
  18 import org.eclipse.jface.preference.IPreferenceStore;
  19 import org.eclipse.jface.preference.PreferenceConverter;
  20 import org.eclipse.jface.text.IDocumentPartitioner;
  21 import org.eclipse.jface.text.TextViewer;
  22 import org.eclipse.jface.text.source.SourceViewer;
  23 import org.eclipse.jface.util.IPropertyChangeListener;
  24 import org.eclipse.jface.util.PropertyChangeEvent;
  25 import org.eclipse.swt.events.DisposeEvent;
  26 import org.eclipse.swt.graphics.RGB;
  27 import org.eclipse.swt.widgets.Composite;
  28 import org.eclipse.ui.texteditor.AbstractTextEditor;
  29
  30 import net.sourceforge.phpeclipse.xml.ui.XMLPlugin;
  31 import net.sourceforge.phpeclipse.xml.ui.internal.text.XMLConfiguration;
  32 import net.sourceforge.phpeclipse.xml.ui.text.XMLTextTools;
  33
  34 /**
  35  * @author Igor Malinin
  36  */
  37 public class XMLMergeViewer extends TextMergeViewer {
  38
  39         /**
  40          * The preference store.
  41          */
  42         private IPreferenceStore preferenceStore;
  43
  44         /**
  45          * The listener for changes to the preference store.
  46          */
  47         private IPropertyChangeListener propertyChangeListener;
  48
  49         /**
  50          * The XML text tools.
  51          */
  52         private XMLTextTools textTools;
  53
  54         /*
  55          * @see TextMergeViewer#TextMergeViewer(Composite, int,
  56          *      CompareConfiguration)
  57          */
  58         public XMLMergeViewer(Composite parent, int style,
  59                         CompareConfiguration configuration) {
  60                 super(parent, style, configuration);
  61         }
  62
  63         // TextMergeViewer Implementation
  64         // ------------------------------------------
  65
  66         /*
  67          * @see TextMergeViewer#configureTextViewer()
  68          */
  69         protected void configureTextViewer(TextViewer textViewer) {
  70                 XMLPlugin plugin = XMLPlugin.getDefault();
  71
  72                 preferenceStore = plugin.getPreferenceStore();
  73                 if (preferenceStore != null) {
  74                         propertyChangeListener = new IPropertyChangeListener() {
  75                                 public void propertyChange(PropertyChangeEvent event) {
  76                                         handlePreferenceStoreChanged(event);
  77                                 }
  78                         };
  79                         preferenceStore.addPropertyChangeListener(propertyChangeListener);
  80                 }
  81
  82                 textTools = plugin.getXMLTextTools();
  83
  84                 if (textViewer instanceof SourceViewer) {
  85                         SourceViewer sourceViewer = (SourceViewer) textViewer;
  86                         sourceViewer.configure(new XMLConfiguration(textTools));
  87                 }
  88
  89                 updateBackgroundColor();
  90         }
  91
  92         /*
  93          * @see TextMergeViewer#getDocumentPartitioner()
  94          */
  95         protected IDocumentPartitioner getDocumentPartitioner() {
  96                 return textTools.createXMLPartitioner();
  97         }
  98
  99         /*
 100          * @see org.eclipse.compare.contentmergeviewer.ContentMergeViewer#getTitle()
 101          */
 102         public String getTitle() {
 103                 return XMLPlugin.getResourceString("XMLMergeViewer.title"); //$NON-NLS-1$
 104         }
 105
 106         /*
 107          * @see org.eclipse.jface.viewers.ContentViewer#handleDispose(org.eclipse.swt.events.DisposeEvent)
 108          */
 109         protected void handleDispose(DisposeEvent event) {
 110                 if (propertyChangeListener != null) {
 111                         if (preferenceStore != null) {
 112                                 preferenceStore.removePropertyChangeListener(
 113                                                 propertyChangeListener);
 114                         }
 115
 116                         propertyChangeListener = null;
 117                 }
 118
 119                 super.handleDispose(event);
 120         }
 121
 122         protected void handlePreferenceStoreChanged(PropertyChangeEvent event) {
 123                 String p = event.getProperty();
 124
 125                 if (p.equals(AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND)
 126                  || p.equals(AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT)) {
 127                         updateBackgroundColor();
 128                 } else if (textTools.affectsBehavior(event)) {
 129                         invalidateTextPresentation();
 130                 }
 131         }
 132
 133         private void updateBackgroundColor() {
 134                 boolean defaultBackgroundColor = preferenceStore.getBoolean(
 135                                 AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT);
 136
 137                 if (defaultBackgroundColor) {
 138                         setBackgroundColor(null);
 139                 } else {
 140                         RGB backgroundColor = PreferenceConverter.getColor(preferenceStore,
 141                                         AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND);
 142                         setBackgroundColor(backgroundColor);
 143                 }
 144         }
 145 }