--- /dev/null
+/*
+ * Copyright (c) 2003-2004 Christopher Lenz and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ *
+ * Contributors:
+ * Christopher Lenz - initial API and implementation
+ *
+ * $Id: CssMergeViewer.java,v 1.1 2004-09-02 18:11:49 jsurfer Exp $
+ */
+
+package net.sourceforge.phpeclipse.css.ui.internal.compare;
+
+import net.sourceforge.phpeclipse.css.ui.CssUI;
+import net.sourceforge.phpeclipse.css.ui.internal.CssUIMessages;
+import net.sourceforge.phpeclipse.css.ui.internal.CssUIPreferences;
+import net.sourceforge.phpeclipse.css.ui.internal.text.CssSourceViewerConfiguration;
+import net.sourceforge.phpeclipse.css.ui.text.CssTextTools;
+
+import org.eclipse.compare.CompareConfiguration;
+import org.eclipse.compare.contentmergeviewer.TextMergeViewer;
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.jface.preference.PreferenceConverter;
+import org.eclipse.jface.text.IDocumentPartitioner;
+import org.eclipse.jface.text.TextViewer;
+import org.eclipse.jface.text.source.SourceViewer;
+import org.eclipse.jface.util.IPropertyChangeListener;
+import org.eclipse.jface.util.PropertyChangeEvent;
+import org.eclipse.swt.events.DisposeEvent;
+import org.eclipse.swt.graphics.RGB;
+import org.eclipse.swt.widgets.Composite;
+
+/**
+ * Merge viewer for CSS files.
+ */
+public class CssMergeViewer extends TextMergeViewer {
+
+ // Constants ---------------------------------------------------------------
+
+ /**
+ * Alias for the preference constant <code>EDITOR_BACKGROUND_COLOR</code>.
+ */
+ private static final String PREFERENCE_BACKGROUND_COLOR =
+ CssUIPreferences.EDITOR_BACKGROUND_COLOR;
+
+ /**
+ * Alias for the preference constant
+ * <code>EDITOR_BACKGROUND_DEFAULT_COLOR</code>.
+ */
+ private static final String PREFERENCE_BACKGROUND_DEFAULT_COLOR =
+ CssUIPreferences.EDITOR_BACKGROUND_DEFAULT_COLOR;
+
+ // Instance Variables ------------------------------------------------------
+
+ /**
+ * The preference store.
+ */
+ private IPreferenceStore preferenceStore;
+
+ /**
+ * The listener for changes to the preference store.
+ */
+ private IPropertyChangeListener propertyChangeListener;
+
+ /**
+ * The CSS text tools.
+ */
+ private CssTextTools textTools;
+
+ // Constructors ------------------------------------------------------------
+
+ /**
+ * Constructor.
+ *
+ * @param parent the parent control
+ * @param style SWT style bits for top level composite of this viewer
+ * @param configuration the configuration object
+ */
+ public CssMergeViewer(Composite parent, int style,
+ CompareConfiguration configuration) {
+ super(parent, style, configuration);
+ }
+
+ // TextMergeViewer Implementation ------------------------------------------
+
+ /*
+ * @see TextMergeViewer#configureTextViewer()
+ */
+ protected void configureTextViewer(TextViewer textViewer) {
+
+ CssUI plugin = CssUI.getDefault();
+
+ this.preferenceStore = plugin.getPreferenceStore();
+ if (preferenceStore != null) {
+ propertyChangeListener = new IPropertyChangeListener() {
+ public void propertyChange(PropertyChangeEvent event) {
+ handlePreferenceStoreChanged(event);
+ }
+ };
+ preferenceStore.addPropertyChangeListener(propertyChangeListener);
+ }
+
+ textTools = plugin.getTextTools();
+ if (textViewer instanceof SourceViewer) {
+ SourceViewer sourceViewer = (SourceViewer) textViewer;
+ sourceViewer.configure(new CssSourceViewerConfiguration(
+ textTools, preferenceStore));
+ }
+
+ updateBackgroundColor();
+ }
+
+ /*
+ * @see TextMergeViewer#getDocumentPartitioner()
+ */
+ protected IDocumentPartitioner getDocumentPartitioner() {
+ return textTools.createDocumentPartitioner();
+ }
+
+ /*
+ * @see org.eclipse.compare.contentmergeviewer.ContentMergeViewer#getTitle()
+ */
+ public String getTitle() {
+ return CssUIMessages.getString(
+ "CssMergeViewer.title"); //$NON-NLS-1$
+ }
+
+ /*
+ * @see org.eclipse.jface.viewers.ContentViewer#handleDispose(org.eclipse.swt.events.DisposeEvent)
+ */
+ protected void handleDispose(DisposeEvent event) {
+ if (propertyChangeListener != null) {
+ if (preferenceStore != null) {
+ preferenceStore.removePropertyChangeListener(
+ propertyChangeListener);
+ }
+ propertyChangeListener = null;
+ }
+ super.handleDispose(event);
+ }
+
+ // Private Methods ---------------------------------------------------------
+
+ /**
+ * Called when the preference store notifies us about a change.
+ *
+ * @param event the change event
+ */
+ protected void handlePreferenceStoreChanged(PropertyChangeEvent event) {
+ String p = event.getProperty();
+ if (PREFERENCE_BACKGROUND_COLOR.equals(p)
+ || PREFERENCE_BACKGROUND_DEFAULT_COLOR.equals(p)) {
+ updateBackgroundColor();
+ } else if (textTools.affectsPresentation(event)) {
+ invalidateTextPresentation();
+ }
+ }
+
+ /**
+ * Updates the background color of the merge viewer to the value set in the
+ * preferences.
+ */
+ private void updateBackgroundColor() {
+ boolean defaultBackgroundColor = preferenceStore.getBoolean(
+ PREFERENCE_BACKGROUND_DEFAULT_COLOR);
+ if (defaultBackgroundColor) {
+ setBackgroundColor(null);
+ } else {
+ RGB backgroundColor = PreferenceConverter.getColor(
+ preferenceStore, CssUIPreferences.EDITOR_BACKGROUND_COLOR);
+ setBackgroundColor(backgroundColor);
+ }
+ }
+
+}
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