[85776] preliminary infrastructure for document folding in wtp source editors

1 files changed, 97 insertions, 0 deletions

diff --git a/bundles/org.eclipse.jst.jsp.ui/src/org/eclipse/jst/jsp/ui/internal/projection/ProjectionModelNodeAdapterFactoryHTML.java b/bundles/org.eclipse.jst.jsp.ui/src/org/eclipse/jst/jsp/ui/internal/projection/ProjectionModelNodeAdapterFactoryHTML.java
new file mode 100644
index 0000000000..4efab4eb27
--- /dev/null
+++ b/bundles/org.eclipse.jst.jsp.ui/src/org/eclipse/jst/jsp/ui/internal/projection/ProjectionModelNodeAdapterFactoryHTML.java
@@ -0,0 +1,97 @@
+/*******************************************************************************
+ * Copyright (c) 2005 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.jst.jsp.ui.internal.projection;
+
+import org.eclipse.jface.text.source.projection.ProjectionViewer;
+import org.eclipse.wst.html.core.HTML40Namespace;
+import org.eclipse.wst.sse.core.AbstractAdapterFactory;
+import org.eclipse.wst.sse.core.INodeAdapter;
+import org.eclipse.wst.sse.core.INodeNotifier;
+import org.w3c.dom.Node;
+
+public class ProjectionModelNodeAdapterFactoryHTML extends AbstractAdapterFactory {
+	// copies of this class located in:
+	// org.eclipse.wst.html.ui.internal.projection
+	// org.eclipse.jst.jsp.ui.internal.projection
+
+	private ProjectionViewer fProjectionViewer;
+
+	public ProjectionModelNodeAdapterFactoryHTML() {
+		adapterKey = ProjectionModelNodeAdapterHTML.class;
+	}
+
+	/**
+	 * Actually creates an adapter for the parent of target if target is the
+	 * "adapt-able" node
+	 */
+	protected INodeAdapter createAdapter(INodeNotifier target) {
+		if ((fProjectionViewer != null) && (target instanceof Node) && ((Node) target).getNodeType() == Node.ELEMENT_NODE) {
+			Node node = (Node) target;
+			if (isNodeProjectable(node)) {
+
+				// actually work with the parent node to listen for add,
+				// delete events
+				Node parent = node.getParentNode();
+				if (parent instanceof INodeNotifier) {
+					INodeNotifier parentNotifier = (INodeNotifier) parent;
+					ProjectionModelNodeAdapterHTML parentAdapter = (ProjectionModelNodeAdapterHTML) parentNotifier.getExistingAdapter(ProjectionModelNodeAdapterHTML.class);
+					if (parentAdapter == null) {
+						// create a new adapter for parent
+						parentAdapter = new ProjectionModelNodeAdapterHTML(this);
+						parentNotifier.addAdapter(parentAdapter);
+					}
+					// call update on parent because a new node has just been
+					// added
+					parentAdapter.updateAdapter(parent);
+				}
+			}
+		}
+
+		return null;
+	}
+
+	ProjectionViewer getProjectionViewer() {
+		return fProjectionViewer;
+	}
+
+	/**
+	 * Returns true if node is a node type able to fold
+	 * 
+	 * @param node
+	 * @return boolean true if node is projectable, false otherwise
+	 */
+	boolean isNodeProjectable(Node node) {
+		if (node.getNodeType() == Node.ELEMENT_NODE) {
+			String tagName = node.getNodeName();
+			// node is only projectable if it is head, body, script, style,
+			// table tags
+			if (HTML40Namespace.ElementName.HEAD.equalsIgnoreCase(tagName) || HTML40Namespace.ElementName.BODY.equalsIgnoreCase(tagName) || HTML40Namespace.ElementName.SCRIPT.equalsIgnoreCase(tagName) || HTML40Namespace.ElementName.STYLE.equalsIgnoreCase(tagName) || HTML40Namespace.ElementName.TABLE.equalsIgnoreCase((tagName)))
+				return true;
+		}
+		return false;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.eclipse.wst.sse.core.AbstractAdapterFactory#release()
+	 */
+	public void release() {
+		fProjectionViewer = null;
+
+		super.release();
+	}
+
+	void setProjectionViewer(ProjectionViewer viewer) {
+		fProjectionViewer = viewer;
+	}
+}