Case Study: adding data and statistics

[ifi-stolz-refaktor.git] / case-study / jdt-before / ui / org / eclipse / jdt / internal / ui / search / JavaSearchTableContentProvider.java

diff --git a/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/search/JavaSearchTableContentProvider.java b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/search/JavaSearchTableContentProvider.java
new file mode 100644 (file)
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+++ b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/search/JavaSearchTableContentProvider.java
@@ -0,0 +1,93 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2011 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.jdt.internal.ui.search;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import org.eclipse.swt.widgets.Table;
+
+import org.eclipse.jface.viewers.TableViewer;
+
+import org.eclipse.search.ui.text.AbstractTextSearchResult;
+
+public class JavaSearchTableContentProvider extends JavaSearchContentProvider {
+       public JavaSearchTableContentProvider(JavaSearchResultPage page) {
+               super(page);
+       }
+       public Object[] getElements(Object inputElement) {
+               if (inputElement instanceof AbstractTextSearchResult) {
+                       Set<Object> filteredElements= new HashSet<Object>();
+                       Object[] rawElements= ((AbstractTextSearchResult)inputElement).getElements();
+                       int limit= getPage().getElementLimit().intValue();
+                       for (int i= 0; i < rawElements.length; i++) {
+                               if (getPage().getDisplayedMatchCount(rawElements[i]) > 0) {
+                                       filteredElements.add(rawElements[i]);
+                                       if (limit != -1 && limit < filteredElements.size()) {
+                                               break;
+                                       }
+                               }
+                       }
+                       return filteredElements.toArray();
+               }
+               return EMPTY_ARR;
+       }
+
+       @Override
+       public void elementsChanged(Object[] updatedElements) {
+               if (getSearchResult() == null)
+                       return;
+
+               int addLimit= getAddLimit();
+
+               TableViewer viewer= (TableViewer) getPage().getViewer();
+               Set<Object> updated= new HashSet<Object>();
+               Set<Object> added= new HashSet<Object>();
+               Set<Object> removed= new HashSet<Object>();
+               for (int i= 0; i < updatedElements.length; i++) {
+                       if (getPage().getDisplayedMatchCount(updatedElements[i]) > 0) {
+                               if (viewer.testFindItem(updatedElements[i]) != null)
+                                       updated.add(updatedElements[i]);
+                               else {
+                                       if (addLimit > 0) {
+                                               added.add(updatedElements[i]);
+                                               addLimit--;
+                                       }
+                               }
+                       } else {
+                               removed.add(updatedElements[i]);
+                       }
+               }
+
+               viewer.add(added.toArray());
+               viewer.update(updated.toArray(), new String[] { SearchLabelProvider.PROPERTY_MATCH_COUNT });
+               viewer.remove(removed.toArray());
+       }
+
+       private int getAddLimit() {
+               int limit= getPage().getElementLimit().intValue();
+               if (limit != -1) {
+                       Table table= (Table) getPage().getViewer().getControl();
+                       int itemCount= table.getItemCount();
+                       if (itemCount >= limit) {
+                               return 0;
+                       }
+                       return limit - itemCount;
+               }
+               return Integer.MAX_VALUE;
+       }
+
+       @Override
+       public void clear() {
+               getPage().getViewer().refresh();
+       }
+
+}