bundles/org.eclipse.wst.css.ui/src/org/eclipse/wst/css/ui/internal/projection/ProjectionModelNodeAdapterCSS.java - sourceediting/webtools.sourceediting - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005, 2006 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.css.ui.internal.projection;

 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;

 import org.eclipse.core.runtime.Platform;
 import org.eclipse.jface.text.Position;
 import org.eclipse.jface.text.source.projection.ProjectionAnnotation;
 import org.eclipse.jface.text.source.projection.ProjectionViewer;
 import org.eclipse.swt.graphics.FontMetrics;
 import org.eclipse.swt.graphics.GC;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.widgets.Canvas;
 import org.eclipse.wst.css.core.internal.provisional.document.ICSSNode;
 import org.eclipse.wst.sse.core.internal.provisional.INodeAdapter;
 import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
 import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion;

 /**
  * Updates projection annotation model with projection annotations for this
  * adapter node's children
  */
 public class ProjectionModelNodeAdapterCSS implements INodeAdapter {
 	private final static boolean debugProjectionPerf = "true".equalsIgnoreCase(Platform.getDebugOption("org.eclipse.wst.css.ui/projectionperf")); //$NON-NLS-1$ //$NON-NLS-2$\

 	private class TagProjectionAnnotation extends ProjectionAnnotation {
 		private boolean fIsVisible = false; /* workaround for BUG85874 */
 		private ICSSNode fNode;

 		public TagProjectionAnnotation(ICSSNode node, boolean isCollapsed) {
 			super(isCollapsed);
 			fNode = node;
 		}

 		public ICSSNode getNode() {
 			return fNode;
 		}

 		/**
 		 * Does not paint hidden annotations. Annotations are hidden when they
 		 * only span one line.
 		 *
 		 * @see ProjectionAnnotation#paint(org.eclipse.swt.graphics.GC,
 		 *      org.eclipse.swt.widgets.Canvas,
 		 *      org.eclipse.swt.graphics.Rectangle)
 		 */
 		public void paint(GC gc, Canvas canvas, Rectangle rectangle) {
 			/* workaround for BUG85874 */
 			/*
 			 * only need to check annotations that are expanded because hidden
 			 * annotations should never have been given the chance to
 			 * collapse.
 			 */
 			if (!isCollapsed()) {
 				// working with rectangle, so line height
 				FontMetrics metrics = gc.getFontMetrics();
 				if (metrics != null) {
 					// do not draw annotations that only span one line and
 					// mark them as not visible
 					if ((rectangle.height / metrics.getHeight()) <= 1) {
 						fIsVisible = false;
 						return;
 					}
 				}
 			}
 			fIsVisible = true;
 			super.paint(gc, canvas, rectangle);
 		}

 		/*
 		 * (non-Javadoc)
 		 *
 		 * @see org.eclipse.jface.text.source.projection.ProjectionAnnotation#markCollapsed()
 		 */
 		public void markCollapsed() {
 			/* workaround for BUG85874 */
 			// do not mark collapsed if annotation is not visible
 			if (fIsVisible)
 				super.markCollapsed();
 		}
 	}

 	ProjectionModelNodeAdapterFactoryCSS fAdapterFactory;
 	private Map fTagAnnotations = new HashMap();

 	public ProjectionModelNodeAdapterCSS(ProjectionModelNodeAdapterFactoryCSS factory) {
 		fAdapterFactory = factory;
 	}

 	/**
 	 * Create a projection position from the given node. Able to get
 	 * projection position if node isNodeProjectable.
 	 *
 	 * @param node
 	 * @return null if no projection position possible, a Position otherwise
 	 */
 	private Position createProjectionPosition(ICSSNode node) {
 		Position pos = null;
 		if (isNodeProjectable(node) && node instanceof IndexedRegion) {
 			// IDocument document =
 			// fAdapterFactory.getProjectionViewer().getDocument();
 			// if (document != null) {
 			IndexedRegion inode = (IndexedRegion) node;
 			int start = inode.getStartOffset();
 			int end = inode.getEndOffset();
 			if (start >= 0 && start < end) {
 				// region-based
 				// extra line when collapsed, but no region increase when
 				// add newline
 				pos = new Position(start, end - start);
 				// try {
 				// // line-based
 				// // extra line when collapsed, but no region
 				// // increase when add newline
 				// IRegion startLineRegion =
 				// document.getLineInformationOfOffset(start);
 				// IRegion endLineRegion =
 				// document.getLineInformationOfOffset(end);
 				// int startOffset = startLineRegion.getOffset();
 				// int endOffset = endLineRegion.getOffset() +
 				// endLineRegion.getLength();
 				// if (endOffset > startOffset) {
 				// pos = new Position(startOffset, endOffset -
 				// startOffset);
 				// }
 				//
 				// // line-based
 				// // no extra line when collapsed, but region increase
 				// // when add newline
 				// int startLine = document.getLineOfOffset(start);
 				// int endLine = document.getLineOfOffset(end);
 				// if (endLine + 1 < document.getNumberOfLines()) {
 				// int offset = document.getLineOffset(startLine);
 				// int endOffset = document.getLineOffset(endLine + 1);
 				// pos = new Position(offset, endOffset - offset);
 				// }
 				// }
 				// catch (BadLocationException x) {
 				// Logger.log(Logger.WARNING_DEBUG, null, x);
 				// }
 			}
 			// }
 		}
 		return pos;
 	}

 	/**
 	 * Find TagProjectionAnnotation for node in the current list of projection
 	 * annotations for this adapter
 	 *
 	 * @param node
 	 * @return TagProjectionAnnotation
 	 */
 	private TagProjectionAnnotation getExistingAnnotation(ICSSNode node) {
 		TagProjectionAnnotation anno = null;

 		if ((node != null) && (!fTagAnnotations.isEmpty())) {
 			Iterator it = fTagAnnotations.keySet().iterator();
 			while (it.hasNext() && anno == null) {
 				TagProjectionAnnotation a = (TagProjectionAnnotation) it.next();
 				ICSSNode n = a.getNode();
 				if (node.equals(n)) {
 					anno = a;
 				}
 			}
 		}
 		return anno;
 	}

 	public boolean isAdapterForType(Object type) {
 		return type == ProjectionModelNodeAdapterCSS.class;
 	}

 	/**
 	 * Returns true if node is a node type able to fold
 	 *
 	 * @param node
 	 * @return boolean true if node is projectable, false otherwise
 	 */
 	private boolean isNodeProjectable(ICSSNode node) {
 		if (node != null) {
 			short type = node.getNodeType();
 			if (type == ICSSNode.STYLERULE_NODE || type == ICSSNode.PAGERULE_NODE || type == ICSSNode.MEDIARULE_NODE || type == ICSSNode.IMPORTRULE_NODE || type == ICSSNode.FONTFACERULE_NODE || type == ICSSNode.CHARSETRULE_NODE)
 				return true;
 		}
 		return false;
 	}

 	public void notifyChanged(INodeNotifier notifier, int eventType, Object changedFeature, Object oldValue, Object newValue, int pos) {
 		// check if folding is even enabled, if not, just ignore notifyChanged
 		// events
 		if (!fAdapterFactory.isActive()) {
 			return;
 		}

 		// workaround for Bug85342 - STRUCTRE_CHANGED is never fired so need
 		// to listen for every ADD, REMOVE
 		// if ((eventType == INodeNotifier.STRUCTURE_CHANGED) && (notifier
 		// instanceof ICSSNode)) {
 		if ((eventType == INodeNotifier.ADD || eventType == INodeNotifier.REMOVE) && (notifier instanceof ICSSNode)) {
 			updateAdapter((ICSSNode) notifier);
 		}
 	}

 	/**
 	 * Update the projection annotation of all the nodes that are children of
 	 * node
 	 *
 	 * @param node
 	 */
 	void updateAdapter(ICSSNode node) {
 		updateAdapter(node, null);
 	}

 	/**
 	 * Update the projection annotation of all the nodes that are children of
 	 * node and adds all projection annotations to viewer (for newly added
 	 * viewers)
 	 *
 	 * @param node
 	 * @param viewer
 	 */
 	void updateAdapter(ICSSNode node, ProjectionViewer viewer) {
 		long start = System.currentTimeMillis();

 		Map additions = new HashMap();
 		Map projectionAnnotations = new HashMap();

 		// go through immediate child nodes and figure out projection
 		// model annotations
 		if (node != null) {
 			ICSSNode childNode = node.getFirstChild();
 			while (childNode != null) {
 				Position newPos = createProjectionPosition(childNode);
 				if (newPos != null) {
 					TagProjectionAnnotation newAnnotation = new TagProjectionAnnotation(childNode, false);
 					TagProjectionAnnotation existing = getExistingAnnotation(childNode);
 					if (existing == null) {
 						// add to map containing all annotations for this
 						// adapter
 						projectionAnnotations.put(newAnnotation, newPos);
 						// add to map containing annotations to add
 						additions.put(newAnnotation, newPos);
 					}
 					else {
 						// add to map containing all annotations for this
 						// adapter
 						projectionAnnotations.put(existing, newPos);
 						// remove from map containing annotations to delete
 						fTagAnnotations.remove(existing);
 					}
 				}
 				childNode = childNode.getNextSibling();
 			}

 			// in the end, want to delete anything leftover in old list, add
 			// everything in additions, and update everything in
 			// projectionAnnotations
 			ProjectionAnnotation[] oldList = null;
 			if (!fTagAnnotations.isEmpty()) {
 				oldList = (ProjectionAnnotation[]) fTagAnnotations.keySet().toArray(new ProjectionAnnotation[0]);
 			}
 			ProjectionAnnotation[] modifyList = null;
 			if (!projectionAnnotations.isEmpty()) {
 				modifyList = (ProjectionAnnotation[]) projectionAnnotations.keySet().toArray(new ProjectionAnnotation[0]);
 			}

 			// specifically add all annotations to viewer
 			if (viewer != null && !projectionAnnotations.isEmpty()) {
 				fAdapterFactory.queueAnnotationModelChanges(node, null, projectionAnnotations, null, viewer);
 			}

 			// only update when there is something to update
 			if ((oldList != null && oldList.length > 0) || (!additions.isEmpty()) || (modifyList != null && modifyList.length > 0))
 				fAdapterFactory.queueAnnotationModelChanges(node, oldList, additions, modifyList);
 		}

 		// save new list of annotations
 		fTagAnnotations = projectionAnnotations;

 		if (debugProjectionPerf) {
 			long end = System.currentTimeMillis();
 			String nodeName = node != null ? node.toString() : "null"; //$NON-NLS-1$
 			System.out.println("ProjectionModelNodeAdapterCSS.updateAdapter (" + nodeName + "):" + (end - start)); //$NON-NLS-1$ //$NON-NLS-2$
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005, 2006 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.css.ui.internal.projection;

	import java.util.HashMap;
	import java.util.Iterator;
	import java.util.Map;

	import org.eclipse.core.runtime.Platform;
	import org.eclipse.jface.text.Position;
	import org.eclipse.jface.text.source.projection.ProjectionAnnotation;
	import org.eclipse.jface.text.source.projection.ProjectionViewer;
	import org.eclipse.swt.graphics.FontMetrics;
	import org.eclipse.swt.graphics.GC;
	import org.eclipse.swt.graphics.Rectangle;
	import org.eclipse.swt.widgets.Canvas;
	import org.eclipse.wst.css.core.internal.provisional.document.ICSSNode;
	import org.eclipse.wst.sse.core.internal.provisional.INodeAdapter;
	import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
	import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion;

	/**
	* Updates projection annotation model with projection annotations for this
	* adapter node's children
	*/
	public class ProjectionModelNodeAdapterCSS implements INodeAdapter {
	private final static boolean debugProjectionPerf = "true".equalsIgnoreCase(Platform.getDebugOption("org.eclipse.wst.css.ui/projectionperf")); //$NON-NLS-1$ //$NON-NLS-2$\

	private class TagProjectionAnnotation extends ProjectionAnnotation {
	private boolean fIsVisible = false; /* workaround for BUG85874 */
	private ICSSNode fNode;

	public TagProjectionAnnotation(ICSSNode node, boolean isCollapsed) {
	super(isCollapsed);
	fNode = node;
	}

	public ICSSNode getNode() {
	return fNode;
	}

	/**
	* Does not paint hidden annotations. Annotations are hidden when they
	* only span one line.
	*
	* @see ProjectionAnnotation#paint(org.eclipse.swt.graphics.GC,
	* org.eclipse.swt.widgets.Canvas,
	* org.eclipse.swt.graphics.Rectangle)
	*/
	public void paint(GC gc, Canvas canvas, Rectangle rectangle) {
	/* workaround for BUG85874 */
	/*
	* only need to check annotations that are expanded because hidden
	* annotations should never have been given the chance to
	* collapse.
	*/
	if (!isCollapsed()) {
	// working with rectangle, so line height
	FontMetrics metrics = gc.getFontMetrics();
	if (metrics != null) {
	// do not draw annotations that only span one line and
	// mark them as not visible
	if ((rectangle.height / metrics.getHeight()) <= 1) {
	fIsVisible = false;
	return;
	}
	}
	}
	fIsVisible = true;
	super.paint(gc, canvas, rectangle);
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jface.text.source.projection.ProjectionAnnotation#markCollapsed()
	*/
	public void markCollapsed() {
	/* workaround for BUG85874 */
	// do not mark collapsed if annotation is not visible
	if (fIsVisible)
	super.markCollapsed();
	}
	}

	ProjectionModelNodeAdapterFactoryCSS fAdapterFactory;
	private Map fTagAnnotations = new HashMap();

	public ProjectionModelNodeAdapterCSS(ProjectionModelNodeAdapterFactoryCSS factory) {
	fAdapterFactory = factory;
	}

	/**
	* Create a projection position from the given node. Able to get
	* projection position if node isNodeProjectable.
	*
	* @param node
	* @return null if no projection position possible, a Position otherwise
	*/
	private Position createProjectionPosition(ICSSNode node) {
	Position pos = null;
	if (isNodeProjectable(node) && node instanceof IndexedRegion) {
	// IDocument document =
	// fAdapterFactory.getProjectionViewer().getDocument();
	// if (document != null) {
	IndexedRegion inode = (IndexedRegion) node;
	int start = inode.getStartOffset();
	int end = inode.getEndOffset();
	if (start >= 0 && start < end) {
	// region-based
	// extra line when collapsed, but no region increase when
	// add newline
	pos = new Position(start, end - start);
	// try {
	// // line-based
	// // extra line when collapsed, but no region
	// // increase when add newline
	// IRegion startLineRegion =
	// document.getLineInformationOfOffset(start);
	// IRegion endLineRegion =
	// document.getLineInformationOfOffset(end);
	// int startOffset = startLineRegion.getOffset();
	// int endOffset = endLineRegion.getOffset() +
	// endLineRegion.getLength();
	// if (endOffset > startOffset) {
	// pos = new Position(startOffset, endOffset -
	// startOffset);
	// }
	//
	// // line-based
	// // no extra line when collapsed, but region increase
	// // when add newline
	// int startLine = document.getLineOfOffset(start);
	// int endLine = document.getLineOfOffset(end);
	// if (endLine + 1 < document.getNumberOfLines()) {
	// int offset = document.getLineOffset(startLine);
	// int endOffset = document.getLineOffset(endLine + 1);
	// pos = new Position(offset, endOffset - offset);
	// }
	// }
	// catch (BadLocationException x) {
	// Logger.log(Logger.WARNING_DEBUG, null, x);
	// }
	}
	// }
	}
	return pos;
	}

	/**
	* Find TagProjectionAnnotation for node in the current list of projection
	* annotations for this adapter
	*
	* @param node
	* @return TagProjectionAnnotation
	*/
	private TagProjectionAnnotation getExistingAnnotation(ICSSNode node) {
	TagProjectionAnnotation anno = null;

	if ((node != null) && (!fTagAnnotations.isEmpty())) {
	Iterator it = fTagAnnotations.keySet().iterator();
	while (it.hasNext() && anno == null) {
	TagProjectionAnnotation a = (TagProjectionAnnotation) it.next();
	ICSSNode n = a.getNode();
	if (node.equals(n)) {
	anno = a;
	}
	}
	}
	return anno;
	}

	public boolean isAdapterForType(Object type) {
	return type == ProjectionModelNodeAdapterCSS.class;
	}

	/**
	* Returns true if node is a node type able to fold
	*
	* @param node
	* @return boolean true if node is projectable, false otherwise
	*/
	private boolean isNodeProjectable(ICSSNode node) {
	if (node != null) {
	short type = node.getNodeType();
	if (type == ICSSNode.STYLERULE_NODE \|\| type == ICSSNode.PAGERULE_NODE \|\| type == ICSSNode.MEDIARULE_NODE \|\| type == ICSSNode.IMPORTRULE_NODE \|\| type == ICSSNode.FONTFACERULE_NODE \|\| type == ICSSNode.CHARSETRULE_NODE)
	return true;
	}
	return false;
	}

	public void notifyChanged(INodeNotifier notifier, int eventType, Object changedFeature, Object oldValue, Object newValue, int pos) {
	// check if folding is even enabled, if not, just ignore notifyChanged
	// events
	if (!fAdapterFactory.isActive()) {
	return;
	}

	// workaround for Bug85342 - STRUCTRE_CHANGED is never fired so need
	// to listen for every ADD, REMOVE
	// if ((eventType == INodeNotifier.STRUCTURE_CHANGED) && (notifier
	// instanceof ICSSNode)) {
	if ((eventType == INodeNotifier.ADD \|\| eventType == INodeNotifier.REMOVE) && (notifier instanceof ICSSNode)) {
	updateAdapter((ICSSNode) notifier);
	}
	}

	/**
	* Update the projection annotation of all the nodes that are children of
	* node
	*
	* @param node
	*/
	void updateAdapter(ICSSNode node) {
	updateAdapter(node, null);
	}

	/**
	* Update the projection annotation of all the nodes that are children of
	* node and adds all projection annotations to viewer (for newly added
	* viewers)
	*
	* @param node
	* @param viewer
	*/
	void updateAdapter(ICSSNode node, ProjectionViewer viewer) {
	long start = System.currentTimeMillis();

	Map additions = new HashMap();
	Map projectionAnnotations = new HashMap();

	// go through immediate child nodes and figure out projection
	// model annotations
	if (node != null) {
	ICSSNode childNode = node.getFirstChild();
	while (childNode != null) {
	Position newPos = createProjectionPosition(childNode);
	if (newPos != null) {
	TagProjectionAnnotation newAnnotation = new TagProjectionAnnotation(childNode, false);
	TagProjectionAnnotation existing = getExistingAnnotation(childNode);
	if (existing == null) {
	// add to map containing all annotations for this
	// adapter
	projectionAnnotations.put(newAnnotation, newPos);
	// add to map containing annotations to add
	additions.put(newAnnotation, newPos);
	}
	else {
	// add to map containing all annotations for this
	// adapter
	projectionAnnotations.put(existing, newPos);
	// remove from map containing annotations to delete
	fTagAnnotations.remove(existing);
	}
	}
	childNode = childNode.getNextSibling();
	}

	// in the end, want to delete anything leftover in old list, add
	// everything in additions, and update everything in
	// projectionAnnotations
	ProjectionAnnotation[] oldList = null;
	if (!fTagAnnotations.isEmpty()) {
	oldList = (ProjectionAnnotation[]) fTagAnnotations.keySet().toArray(new ProjectionAnnotation[0]);
	}
	ProjectionAnnotation[] modifyList = null;
	if (!projectionAnnotations.isEmpty()) {
	modifyList = (ProjectionAnnotation[]) projectionAnnotations.keySet().toArray(new ProjectionAnnotation[0]);
	}

	// specifically add all annotations to viewer
	if (viewer != null && !projectionAnnotations.isEmpty()) {
	fAdapterFactory.queueAnnotationModelChanges(node, null, projectionAnnotations, null, viewer);
	}

	// only update when there is something to update
	if ((oldList != null && oldList.length > 0) \|\| (!additions.isEmpty()) \|\| (modifyList != null && modifyList.length > 0))
	fAdapterFactory.queueAnnotationModelChanges(node, oldList, additions, modifyList);
	}

	// save new list of annotations
	fTagAnnotations = projectionAnnotations;

	if (debugProjectionPerf) {
	long end = System.currentTimeMillis();
	String nodeName = node != null ? node.toString() : "null"; //$NON-NLS-1$
	System.out.println("ProjectionModelNodeAdapterCSS.updateAdapter (" + nodeName + "):" + (end - start)); //$NON-NLS-1$ //$NON-NLS-2$
	}
	}
	}