[281380] Code folding inefficient and broken
diff --git a/bundles/org.eclipse.wst.xml.ui/src/org/eclipse/wst/xml/ui/internal/projection/XMLFoldingStrategy.java b/bundles/org.eclipse.wst.xml.ui/src/org/eclipse/wst/xml/ui/internal/projection/XMLFoldingStrategy.java
new file mode 100644
index 0000000..00e66cb
--- /dev/null
+++ b/bundles/org.eclipse.wst.xml.ui/src/org/eclipse/wst/xml/ui/internal/projection/XMLFoldingStrategy.java
@@ -0,0 +1,71 @@
+/*******************************************************************************
+ * Copyright (c) 2009 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.wst.xml.ui.internal.projection;
+
+import org.eclipse.jface.text.Position;
+import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion;
+import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
+import org.eclipse.wst.sse.ui.internal.projection.AbstractStructuredFoldingStrategy;
+import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode;
+import org.eclipse.wst.xml.core.internal.provisional.document.IDOMText;
+
+
+/**
+ * A folding strategy for XML type structured documents.
+ * See AbstractStructuredFoldingStrategy for more details.
+ */
+public class XMLFoldingStrategy extends AbstractStructuredFoldingStrategy {
+
+ /**
+ * Create an instance of the folding strategy.
+ * Be sure to set the viewer and document after creation.
+ */
+ public XMLFoldingStrategy() {
+ super();
+ }
+
+ /*
+ * (non-Javadoc)
+ * @see org.eclipse.wst.sse.ui.internal.projection.AbstractFoldingStrategy#calcNewFoldPosition(org.eclipse.wst.sse.core.internal.provisional.IndexedRegion)
+ */
+ protected Position calcNewFoldPosition(IndexedRegion indexedRegion) {
+ Position retPos = null;
+
+ if(indexedRegionValidType(indexedRegion)) {
+ IDOMNode node = (IDOMNode)indexedRegion;
+ IStructuredDocumentRegion startRegion = node.getStartStructuredDocumentRegion();
+ IStructuredDocumentRegion endRegion = node.getEndStructuredDocumentRegion();
+
+ int start;
+ int length;
+ //if the node has an endRegion (end tag) then folding region is
+ // between the start and end tag
+ //else if the region is only an open tag or an open/close tag then don't fold it
+ if(startRegion != null && endRegion != null) {
+ start = startRegion.getStartOffset();
+ length = endRegion.getStartOffset() - start;
+
+ retPos = new Position(start, length);
+ }
+ }
+
+ return retPos;
+ }
+
+ /*
+ * (non-Javadoc)
+ * @see org.eclipse.wst.sse.ui.internal.projection.AbstractFoldingStrategy#indexedRegionValidType(org.eclipse.wst.sse.core.internal.provisional.IndexedRegion)
+ */
+ protected boolean indexedRegionValidType(IndexedRegion indexedRegion) {
+ return (indexedRegion instanceof IDOMNode) && !(indexedRegion instanceof IDOMText);
+ }
+}