1) Moved net.sourceforge.phpeclipse.ui\src\net\sourceforge\phpdt back to net.sourcefo...

[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / internal / ui / viewsupport / ProblemTreeViewer.java

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/viewsupport/ProblemTreeViewer.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/viewsupport/ProblemTreeViewer.java
new file mode 100644 (file)
index 0000000..ba501eb
--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/viewsupport/ProblemTreeViewer.java
@@ -0,0 +1,148 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 IBM Corporation 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:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+
+package net.sourceforge.phpdt.internal.ui.viewsupport;
+
+import java.util.ArrayList;
+
+import net.sourceforge.phpdt.core.IMember;
+import net.sourceforge.phpdt.ui.IWorkingCopyProvider;
+import net.sourceforge.phpdt.ui.ProblemsLabelDecorator.ProblemsLabelChangedEvent;
+
+import org.eclipse.core.resources.IResource;
+import org.eclipse.jface.viewers.IBaseLabelProvider;
+import org.eclipse.jface.viewers.LabelProviderChangedEvent;
+import org.eclipse.jface.viewers.TreeViewer;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Item;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.swt.widgets.Widget;
+
+/**
+ * Extends a TreeViewer to allow more performance when showing error ticks. A
+ * <code>ProblemItemMapper</code> is contained that maps all items in the tree
+ * to underlying resource
+ */
+public class ProblemTreeViewer extends TreeViewer {
+
+       protected ResourceToItemsMapper fResourceToItemsMapper;
+
+       /*
+        * @see TreeViewer#TreeViewer(Composite)
+        */
+       public ProblemTreeViewer(Composite parent) {
+               super(parent);
+               initMapper();
+       }
+
+       /*
+        * @see TreeViewer#TreeViewer(Composite, int)
+        */
+       public ProblemTreeViewer(Composite parent, int style) {
+               super(parent, style);
+               initMapper();
+       }
+
+       /*
+        * @see TreeViewer#TreeViewer(Tree)
+        */
+       public ProblemTreeViewer(Tree tree) {
+               super(tree);
+               initMapper();
+       }
+
+       private void initMapper() {
+               fResourceToItemsMapper = new ResourceToItemsMapper(this);
+       }
+
+       /*
+        * @see StructuredViewer#mapElement(Object, Widget)
+        */
+       protected void mapElement(Object element, Widget item) {
+               super.mapElement(element, item);
+               if (item instanceof Item) {
+                       fResourceToItemsMapper.addToMap(element, (Item) item);
+               }
+       }
+
+       /*
+        * @see StructuredViewer#unmapElement(Object, Widget)
+        */
+       protected void unmapElement(Object element, Widget item) {
+               if (item instanceof Item) {
+                       fResourceToItemsMapper.removeFromMap(element, (Item) item);
+               }
+               super.unmapElement(element, item);
+       }
+
+       /*
+        * @see StructuredViewer#unmapAllElements()
+        */
+       protected void unmapAllElements() {
+               fResourceToItemsMapper.clearMap();
+               super.unmapAllElements();
+       }
+
+       /*
+        * @see ContentViewer#handleLabelProviderChanged(LabelProviderChangedEvent)
+        */
+       protected void handleLabelProviderChanged(LabelProviderChangedEvent event) {
+               if (event instanceof ProblemsLabelChangedEvent) {
+                       ProblemsLabelChangedEvent e = (ProblemsLabelChangedEvent) event;
+                       if (!e.isMarkerChange() && canIgnoreChangesFromAnnotionModel()) {
+                               return;
+                       }
+               }
+
+               Object[] changed = event.getElements();
+               if (changed != null && !fResourceToItemsMapper.isEmpty()) {
+                       ArrayList others = new ArrayList();
+                       for (int i = 0; i < changed.length; i++) {
+                               Object curr = changed[i];
+                               if (curr instanceof IResource) {
+                                       fResourceToItemsMapper.resourceChanged((IResource) curr);
+                               } else {
+                                       others.add(curr);
+                               }
+                       }
+                       if (others.isEmpty()) {
+                               return;
+                       }
+                       event = new LabelProviderChangedEvent((IBaseLabelProvider) event
+                                       .getSource(), others.toArray());
+               }
+               super.handleLabelProviderChanged(event);
+       }
+
+       /**
+        * Answers whether this viewer can ignore label provider changes resulting
+        * from marker changes in annotation models
+        */
+       private boolean canIgnoreChangesFromAnnotionModel() {
+               Object contentProvider = getContentProvider();
+               return contentProvider instanceof IWorkingCopyProvider
+                               && !((IWorkingCopyProvider) contentProvider)
+                                               .providesWorkingCopies();
+       }
+
+       /*
+        * (non-Javadoc)
+        * 
+        * @see org.eclipse.jface.viewers.AbstractTreeViewer#isExpandable(java.lang.Object)
+        */
+       public boolean isExpandable(Object element) {
+               // workaround for 65762
+               if (hasFilters() && element instanceof IMember) {
+                       return getFilteredChildren(element).length > 0;
+               }
+               return super.isExpandable(element);
+       }
+}