jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/commands/range/ApplyStyleCommand.java - jsf/webtools.jsf - Git at Google

 /*******************************************************************************
  * Copyright (c) 2006 Sybase, Inc. 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:
  *     Sybase, Inc. - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jst.pagedesigner.commands.range;

 import java.util.ArrayList;
 import java.util.List;

 import org.eclipse.jst.pagedesigner.IHTMLConstants;
 import org.eclipse.jst.pagedesigner.commands.CommandResources;
 import org.eclipse.jst.pagedesigner.dom.DOMRange;
 import org.eclipse.jst.pagedesigner.dom.DOMRefPosition;
 import org.eclipse.jst.pagedesigner.dom.DOMUtil;
 import org.eclipse.jst.pagedesigner.dom.EditModelQuery;
 import org.eclipse.jst.pagedesigner.dom.IDOMPosition;
 import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer;
 import org.eclipse.wst.xml.core.internal.provisional.document.IDOMText;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.Text;

 /**
  * @author mengbo
  */
 public class ApplyStyleCommand extends RangeModeCommand {
 	private String _tag;

 	private String _cssProperty;

 	private String _cssPropertyValue;

 	protected Element _applyingNode;

 	/**
 	 * @param label
 	 * @param viewer
 	 */
 	public ApplyStyleCommand(IHTMLGraphicalViewer viewer, String tag,
 			String property, String value) {
 		super(
 				CommandResources
 						.getString("ApplyStyleCommand.Label.ApplyStyle"), viewer); //$NON-NLS-1$
 		this._tag = tag;
 		this._cssProperty = property;
 		this._cssPropertyValue = value;
 	}

 	public ApplyStyleCommand(IHTMLGraphicalViewer viewer, Element node,
 			String property, String value) {
 		super(
 				CommandResources
 						.getString("ApplyStyleCommand.Label.ApplyStyle"), viewer); //$NON-NLS-1$
 		this._applyingNode = node;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.commands.DesignerCommand#doExecute()
 	 */
 	protected DOMRange doRangeExecute(DOMRange range) {
 		if (range == null || range.isEmpty()) {
 			return null;
 		}

 		boolean ordered = range.isOrdered();
 		IDOMPosition start = ordered ? range.getStartPosition() : range
 				.getEndPosition();
 		IDOMPosition end = ordered ? range.getEndPosition() : range
 				.getStartPosition();

 		Node startContainer = start.getContainerNode();
 		Node endContainer = end.getContainerNode();

 		Node common = DOMUtil.findCommonAncester(start.getContainerNode(), end
 				.getContainerNode());
 		if (common == null) {
 			// should not happen.
 			return null;
 		}

 		if (common instanceof Text) {
 			// under the same Text scope
 			range = doTextNodeStyleApply((Text) common, start.getOffset(), end
 					.getOffset());

 			return range;
 		} else {

 			if (startContainer instanceof Text) {
 				// if the start offset is 0,then skip split the Text
 				if (start.getOffset() > 0) {
 					startContainer = ((Text) startContainer).splitText(start
 							.getOffset());
 					start = new DOMRefPosition(startContainer, false);
 				}
 			} else {
 				startContainer = start.getNextSiblingNode();
 			}
 			if (endContainer instanceof Text) {
 				if (end.getOffset() > 0) {
 					endContainer = ((Text) endContainer).splitText(end
 							.getOffset());
 					endContainer = endContainer.getPreviousSibling();
 				} else {
 					endContainer = endContainer.getPreviousSibling();
 				}
 			} else {
 				endContainer = end.getPreviousSiblingNode();
 			}

 			for (Node node = startContainer; node != endContainer; node = EditModelQuery
 					.getInstance().getNextLeafNeighbor(node)) {
 				if (EditModelQuery.hasAncestor(node, getTag(), true)) {
 					continue;
 				}
 				Element newnode = createStyleElement();
 				node.getParentNode().insertBefore(newnode, node);
 				newnode.appendChild(node);
 			}
 			if (!EditModelQuery.hasAncestor(endContainer, getTag(), true)) {
 				Element newnode = createStyleElement();
 				endContainer.getParentNode()
 						.insertBefore(newnode, endContainer);
 				newnode.appendChild(endContainer);
 			}

 		}

 		// merge the style tags

 		for (Node node = startContainer; node != endContainer; node = EditModelQuery
 				.getInstance().getNextLeafNeighbor(node)) {
 			Node stylenode = node;
 			while (stylenode != null
 					&& !stylenode.getNodeName().equalsIgnoreCase(getTag())) {
 				stylenode = stylenode.getParentNode();
 			}
 			if (stylenode == null) {
 				continue;
 			}
 			if (stylenode.getNextSibling() != null
 					&& stylenode.getNextSibling().getNodeName()
 							.equalsIgnoreCase(getTag())) {
 				Node sibling = stylenode.getNextSibling();
 				while (sibling.getFirstChild() != null) {
 					stylenode.appendChild(sibling.getFirstChild());
 				}
 				stylenode.getParentNode().removeChild(sibling);
 				node = startContainer;
 			}
 		}

 		return new DOMRange(start, end);

 		/*
 		 * boolean ordered = range.isOrdered(); IDOMPosition start = ordered ?
 		 * range.getStartPosition() : range.getEndPosition(); IDOMPosition end =
 		 * ordered ? range.getEndPosition() : range.getStartPosition();
 		 *
 		 * Node common = DOMUtil.findCommonAncester(start.getContainerNode(),
 		 * end.getContainerNode()); if (common == null) { // should not happen.
 		 * return null; }
 		 *
 		 * DOMRange result = null; if (common instanceof Text) { result =
 		 * doTextNodeStyleApply((Text) common, start.getOffset(),
 		 * end.getOffset()); } else { IDOMPosition startPosition = start;
 		 * IDOMPosition endPosition = end; Node ancester = common; DOMRange[]
 		 * leftRange = new DOMRange[1]; DOMRange[] rightRange = new DOMRange[1];
 		 *
 		 * startPosition = partialApply(startPosition, ancester, true,
 		 * leftRange); endPosition = partialApply(endPosition, ancester, false,
 		 * rightRange); DOMRange middle = middleApply(ancester, startPosition,
 		 * endPosition);
 		 *
 		 * IDOMPosition startref = null; if (leftRange[0] != null &&
 		 * leftRange[0].getStartPosition() != null) { startref =
 		 * leftRange[0].getStartPosition(); } else if (middle != null &&
 		 * middle.getStartPosition() != null) { startref =
 		 * middle.getStartPosition(); } else if (rightRange[0] != null &&
 		 * rightRange[0].getStartPosition() != null) { startref =
 		 * rightRange[0].getStartPosition(); }
 		 *
 		 * IDOMPosition endref = null; if (rightRange[0] != null &&
 		 * rightRange[0].getEndPosition() != null) { endref =
 		 * rightRange[0].getEndPosition(); } else if (middle != null &&
 		 * middle.getEndPosition() != null) { endref = middle.getEndPosition(); }
 		 * else if (leftRange[0] != null && leftRange[0].getEndPosition() !=
 		 * null) { endref = leftRange[0].getEndPosition(); }
 		 *
 		 * if (startref == null) { result = null; } else { startref = new
 		 * DOMPosition(EditModelQuery.getInstance().getNextLeafNeighbor(startref.getContainerNode()),
 		 * 0); System.out.println(startref.toString()); endref = new
 		 * DOMPosition(endref.getContainerNode(), 0); result = new
 		 * DOMRange(startref, endref); } }
 		 *
 		 * if (result == null) { return null; }
 		 *
 		 * if (ordered) { return result; } else { return new
 		 * DOMRange(result.getEndPosition(), result.getStartPosition()); }
 		 */
 	}

 	private DOMRange middleApply(Node ancester, IDOMPosition startPosition,
 			IDOMPosition endPosition) {
 		startPosition = skip(startPosition, true);
 		if (startPosition.getNextSiblingNode() == null
 				|| startPosition.getOffset() >= endPosition.getOffset()) {
 			return null;
 		} else {
 			List needMove = new ArrayList();
 			Node startNext = startPosition.getNextSiblingNode();
 			Node endNext = endPosition.getNextSiblingNode();
 			while (startNext != null && startNext != endNext) {
 				needMove.add(startNext);
 				startNext = startNext.getNextSibling();
 			}
 			Element newEle = createStyleElement();
 			ancester.insertBefore(newEle, startPosition.getNextSiblingNode());
 			for (int i = 0, n = needMove.size(); i < n; i++) {
 				newEle.appendChild((Node) needMove.get(i));
 			}
 			return new DOMRange(new DOMRefPosition(newEle, false),
 					new DOMRefPosition(newEle, true));
 		}

 	}

 	private IDOMPosition partialApply(IDOMPosition position, Node ancester,
 			boolean forward, DOMRange[] result) {
 		IDOMPosition startRef = null, endRef = null;

 		while (position != null && position.getContainerNode() != ancester) {
 			Node container = position.getContainerNode();
 			if (container instanceof Text) {
 				// splitText will move the position up one level
 				position = splitText(position);
 			} else {
 				// skip those nodes that can't have the style applied.
 				position = skip(position, forward);
 				Node sibling = position.getSibling(forward);
 				if (sibling != null) {
 					List needMove = new ArrayList();
 					while (sibling != null) {
 						needMove.add(sibling);
 						sibling = forward ? sibling.getNextSibling() : sibling
 								.getPreviousSibling();
 					}

 					// ok, there is nodes that need the style
 					Element newEle = createStyleElement();
 					container.insertBefore(newEle, position
 							.getNextSiblingNode());
 					for (int i = 0, size = needMove.size(); i < size; i++) {
 						newEle.appendChild((Node) needMove.get(i));
 					}
 					if (startRef == null) {
 						startRef = new DOMRefPosition(newEle, !forward);
 					}
 					endRef = new DOMRefPosition(newEle, forward);
 				}
 				// move the position up one level
 				position = new DOMRefPosition(container, forward);
 			}
 		}
 		if (startRef == null) {
 			result[0] = null;
 		} else {
 			result[0] = forward ? new DOMRange(startRef, endRef)
 					: new DOMRange(endRef, startRef);
 		}
 		return position;
 	}

 	/**
 	 * @param position
 	 * @return
 	 */
 	private IDOMPosition splitText(IDOMPosition position) {
 		Text text = (Text) position.getContainerNode();
 		int offset = position.getOffset();
 		if (offset <= 0) {
 			return new DOMRefPosition(text, false);
 		} else if (offset >= text.getData().length()) {
 			return new DOMRefPosition(text, true);
 		} else {
 			text.splitText(offset);
 			return new DOMRefPosition(text, true);
 		}
 	}

 	/**
 	 * @param start
 	 * @param end
 	 * @param common
 	 */
 	private DOMRange doTextNodeStyleApply(Text textNode, int startOffset,
 			int endOffset) {
 		String data = textNode.getData();
 		String before = data.substring(0, startOffset);
 		String middle = data.substring(startOffset, endOffset);
 		String tail = data.substring(endOffset);

 		Text middleText = getModel().getDocument().createTextNode(middle);

 		// case 1: normal one
 		if (!isEmptyString(before) && !isEmptyString(tail)) {
 			Node parent = textNode.getParentNode();
 			parent.insertBefore(
 					getModel().getDocument().createTextNode(before), textNode);
 			Element bnode = createStyleElement();
 			bnode.appendChild(middleText);
 			parent.insertBefore(bnode, textNode);
 			textNode.setNodeValue(tail);
 		}

 		if (isEmptyString(before) && !isEmptyString(tail)) {
 			Node sibling = textNode.getPreviousSibling();
 			if (sibling != null
 					&& sibling.getNodeName().equalsIgnoreCase(getTag())) {
 				sibling.appendChild(middleText);
 			} else {
 				Node parent = textNode.getParentNode();
 				parent.insertBefore(getModel().getDocument().createTextNode(
 						before), textNode);
 				Element bnode = createStyleElement();
 				bnode.appendChild(middleText);
 				parent.insertBefore(bnode, textNode);
 			}
 			textNode.setNodeValue(tail);
 		}

 		if (!isEmptyString(before) && isEmptyString(tail)) {
 			Node sibling = textNode.getNextSibling();
 			textNode.setNodeValue(before);
 			if (sibling != null
 					&& sibling.getNodeName().equalsIgnoreCase(getTag())) {
 				sibling.insertBefore(middleText, sibling.getFirstChild());
 			} else {
 				Element bnode = createStyleElement();
 				bnode.appendChild(middleText);
 				textNode.getParentNode().insertBefore(bnode, sibling);
 			}
 		}

 		if (isEmptyString(before) && isEmptyString(tail)) {

 			Node previousSibling = textNode.getPreviousSibling();
 			Node nextSibling = textNode.getNextSibling();
 			//
 			if (getTag().equalsIgnoreCase(IHTMLConstants.TAG_P)) {
 				Element bnode = createStyleElement();
 				bnode.appendChild(middleText);
 				textNode.getParentNode().insertBefore(bnode, textNode);
 				textNode.getParentNode().removeChild(textNode);
 			}
 			//
 			else {
 				if (previousSibling != null
 						&& previousSibling.getNodeName().equalsIgnoreCase(
 								getTag()) && nextSibling != null
 						&& nextSibling.getNodeName().equalsIgnoreCase(getTag())) {
 					previousSibling.appendChild(middleText);
 					while (nextSibling.getFirstChild() != null) {
 						previousSibling
 								.appendChild(nextSibling.getFirstChild());
 					}
 					nextSibling.getParentNode().removeChild(nextSibling);
 				} else if (previousSibling != null
 						&& previousSibling.getNodeName().equalsIgnoreCase(
 								getTag())) {
 					previousSibling.appendChild(middleText);
 				} else if (nextSibling != null
 						&& nextSibling.getNodeName().equalsIgnoreCase(getTag())) {
 					nextSibling.insertBefore(middleText, nextSibling
 							.getFirstChild());
 				} else {
 					Element bnode = createStyleElement();
 					bnode.appendChild(middleText);
 					textNode.getParentNode().insertBefore(bnode, textNode);
 				}
 				textNode.getParentNode().removeChild(textNode);
 			}
 		}

 		return new DOMRange(new DOMRefPosition(middleText, false),
 				new DOMRefPosition(middleText, true));
 	}

 	private boolean isEmptyString(String str) {
 		if (str == null || str.length() == 0) {
 			return true;
 		}
 		return false;
 	}

 	/**
 	 * @return
 	 */
 	protected Element createStyleElement() {
 		if (_applyingNode != null) {
 			return _applyingNode;
 		} else {
 			Element element = getModel().getDocument().createElement(getTag());
 			if (_cssProperty != null && _cssPropertyValue != null) {
 				element.setAttribute(_cssProperty, _cssPropertyValue);
 			}
 			return element;
 		}
 	}

 	/**
 	 * @param position
 	 * @param b
 	 * @return
 	 */
 	private IDOMPosition skip(IDOMPosition position, boolean forward) {
 		Node node = position.getSibling(forward);

 		if (node == null) {
 			return position;
 		}
 		boolean canSkip = false;
 		if (node instanceof Text) {
 			canSkip = ((IDOMText) node).isElementContentWhitespace();
 		} else if (node instanceof Element) {
 			if (getTag().equalsIgnoreCase(((Element) node).getTagName())) {
 				canSkip = true;
 			} else {
 				canSkip = false;
 			}
 		} else {
 			canSkip = true;
 		}
 		if (canSkip) {
 			return new DOMRefPosition(node, forward);
 		} else {
 			return position;
 		}
 	}

 	/**
 	 * @return Returns the _cssProperty.
 	 */
 	public final String getCssProperty() {
 		return _cssProperty;
 	}

 	/**
 	 * @param property
 	 *            The _cssProperty to set.
 	 */
 	public final void setCssProperty(String property) {
 		_cssProperty = property;
 	}

 	/**
 	 * @return Returns the _cssPropertyValue.
 	 */
 	public final String getCssPropertyValue() {
 		return _cssPropertyValue;
 	}

 	/**
 	 * @param propertyValue
 	 *            The _cssPropertyValue to set.
 	 */
 	public final void setCssPropertyValue(String propertyValue) {
 		_cssPropertyValue = propertyValue;
 	}

 	/**
 	 * @return Returns the _tag.
 	 */
 	public final String getTag() {
 		if (_tag != null) {
 			return _tag;
 		} else {
 			return _applyingNode.getNodeName();
 		}
 	}

 	/**
 	 * @param _tag
 	 *            The _tag to set.
 	 */
 	public final void setTag(String _tag) {
 		this._tag = _tag;
 	}

 	private void updateStyleElement() {

 	}
 }
	/*******************************************************************************
	* Copyright (c) 2006 Sybase, Inc. 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:
	* Sybase, Inc. - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jst.pagedesigner.commands.range;

	import java.util.ArrayList;
	import java.util.List;

	import org.eclipse.jst.pagedesigner.IHTMLConstants;
	import org.eclipse.jst.pagedesigner.commands.CommandResources;
	import org.eclipse.jst.pagedesigner.dom.DOMRange;
	import org.eclipse.jst.pagedesigner.dom.DOMRefPosition;
	import org.eclipse.jst.pagedesigner.dom.DOMUtil;
	import org.eclipse.jst.pagedesigner.dom.EditModelQuery;
	import org.eclipse.jst.pagedesigner.dom.IDOMPosition;
	import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer;
	import org.eclipse.wst.xml.core.internal.provisional.document.IDOMText;
	import org.w3c.dom.Element;
	import org.w3c.dom.Node;
	import org.w3c.dom.Text;

	/**
	* @author mengbo
	*/
	public class ApplyStyleCommand extends RangeModeCommand {
	private String _tag;

	private String _cssProperty;

	private String _cssPropertyValue;

	protected Element _applyingNode;

	/**
	* @param label
	* @param viewer
	*/
	public ApplyStyleCommand(IHTMLGraphicalViewer viewer, String tag,
	String property, String value) {
	super(
	CommandResources
	.getString("ApplyStyleCommand.Label.ApplyStyle"), viewer); //$NON-NLS-1$
	this._tag = tag;
	this._cssProperty = property;
	this._cssPropertyValue = value;
	}

	public ApplyStyleCommand(IHTMLGraphicalViewer viewer, Element node,
	String property, String value) {
	super(
	CommandResources
	.getString("ApplyStyleCommand.Label.ApplyStyle"), viewer); //$NON-NLS-1$
	this._applyingNode = node;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.commands.DesignerCommand#doExecute()
	*/
	protected DOMRange doRangeExecute(DOMRange range) {
	if (range == null \|\| range.isEmpty()) {
	return null;
	}

	boolean ordered = range.isOrdered();
	IDOMPosition start = ordered ? range.getStartPosition() : range
	.getEndPosition();
	IDOMPosition end = ordered ? range.getEndPosition() : range
	.getStartPosition();

	Node startContainer = start.getContainerNode();
	Node endContainer = end.getContainerNode();

	Node common = DOMUtil.findCommonAncester(start.getContainerNode(), end
	.getContainerNode());
	if (common == null) {
	// should not happen.
	return null;
	}

	if (common instanceof Text) {
	// under the same Text scope
	range = doTextNodeStyleApply((Text) common, start.getOffset(), end
	.getOffset());

	return range;
	} else {

	if (startContainer instanceof Text) {
	// if the start offset is 0,then skip split the Text
	if (start.getOffset() > 0) {
	startContainer = ((Text) startContainer).splitText(start
	.getOffset());
	start = new DOMRefPosition(startContainer, false);
	}
	} else {
	startContainer = start.getNextSiblingNode();
	}
	if (endContainer instanceof Text) {
	if (end.getOffset() > 0) {
	endContainer = ((Text) endContainer).splitText(end
	.getOffset());
	endContainer = endContainer.getPreviousSibling();
	} else {
	endContainer = endContainer.getPreviousSibling();
	}
	} else {
	endContainer = end.getPreviousSiblingNode();
	}

	for (Node node = startContainer; node != endContainer; node = EditModelQuery
	.getInstance().getNextLeafNeighbor(node)) {
	if (EditModelQuery.hasAncestor(node, getTag(), true)) {
	continue;
	}
	Element newnode = createStyleElement();
	node.getParentNode().insertBefore(newnode, node);
	newnode.appendChild(node);
	}
	if (!EditModelQuery.hasAncestor(endContainer, getTag(), true)) {
	Element newnode = createStyleElement();
	endContainer.getParentNode()
	.insertBefore(newnode, endContainer);
	newnode.appendChild(endContainer);
	}

	}

	// merge the style tags

	for (Node node = startContainer; node != endContainer; node = EditModelQuery
	.getInstance().getNextLeafNeighbor(node)) {
	Node stylenode = node;
	while (stylenode != null
	&& !stylenode.getNodeName().equalsIgnoreCase(getTag())) {
	stylenode = stylenode.getParentNode();
	}
	if (stylenode == null) {
	continue;
	}
	if (stylenode.getNextSibling() != null
	&& stylenode.getNextSibling().getNodeName()
	.equalsIgnoreCase(getTag())) {
	Node sibling = stylenode.getNextSibling();
	while (sibling.getFirstChild() != null) {
	stylenode.appendChild(sibling.getFirstChild());
	}
	stylenode.getParentNode().removeChild(sibling);
	node = startContainer;
	}
	}

	return new DOMRange(start, end);

	/*
	* boolean ordered = range.isOrdered(); IDOMPosition start = ordered ?
	* range.getStartPosition() : range.getEndPosition(); IDOMPosition end =
	* ordered ? range.getEndPosition() : range.getStartPosition();
	*
	* Node common = DOMUtil.findCommonAncester(start.getContainerNode(),
	* end.getContainerNode()); if (common == null) { // should not happen.
	* return null; }
	*
	* DOMRange result = null; if (common instanceof Text) { result =
	* doTextNodeStyleApply((Text) common, start.getOffset(),
	* end.getOffset()); } else { IDOMPosition startPosition = start;
	* IDOMPosition endPosition = end; Node ancester = common; DOMRange[]
	* leftRange = new DOMRange[1]; DOMRange[] rightRange = new DOMRange[1];
	*
	* startPosition = partialApply(startPosition, ancester, true,
	* leftRange); endPosition = partialApply(endPosition, ancester, false,
	* rightRange); DOMRange middle = middleApply(ancester, startPosition,
	* endPosition);
	*
	* IDOMPosition startref = null; if (leftRange[0] != null &&
	* leftRange[0].getStartPosition() != null) { startref =
	* leftRange[0].getStartPosition(); } else if (middle != null &&
	* middle.getStartPosition() != null) { startref =
	* middle.getStartPosition(); } else if (rightRange[0] != null &&
	* rightRange[0].getStartPosition() != null) { startref =
	* rightRange[0].getStartPosition(); }
	*
	* IDOMPosition endref = null; if (rightRange[0] != null &&
	* rightRange[0].getEndPosition() != null) { endref =
	* rightRange[0].getEndPosition(); } else if (middle != null &&
	* middle.getEndPosition() != null) { endref = middle.getEndPosition(); }
	* else if (leftRange[0] != null && leftRange[0].getEndPosition() !=
	* null) { endref = leftRange[0].getEndPosition(); }
	*
	* if (startref == null) { result = null; } else { startref = new
	* DOMPosition(EditModelQuery.getInstance().getNextLeafNeighbor(startref.getContainerNode()),
	* 0); System.out.println(startref.toString()); endref = new
	* DOMPosition(endref.getContainerNode(), 0); result = new
	* DOMRange(startref, endref); } }
	*
	* if (result == null) { return null; }
	*
	* if (ordered) { return result; } else { return new
	* DOMRange(result.getEndPosition(), result.getStartPosition()); }
	*/
	}

	private DOMRange middleApply(Node ancester, IDOMPosition startPosition,
	IDOMPosition endPosition) {
	startPosition = skip(startPosition, true);
	if (startPosition.getNextSiblingNode() == null
	\|\| startPosition.getOffset() >= endPosition.getOffset()) {
	return null;
	} else {
	List needMove = new ArrayList();
	Node startNext = startPosition.getNextSiblingNode();
	Node endNext = endPosition.getNextSiblingNode();
	while (startNext != null && startNext != endNext) {
	needMove.add(startNext);
	startNext = startNext.getNextSibling();
	}
	Element newEle = createStyleElement();
	ancester.insertBefore(newEle, startPosition.getNextSiblingNode());
	for (int i = 0, n = needMove.size(); i < n; i++) {
	newEle.appendChild((Node) needMove.get(i));
	}
	return new DOMRange(new DOMRefPosition(newEle, false),
	new DOMRefPosition(newEle, true));
	}

	}

	private IDOMPosition partialApply(IDOMPosition position, Node ancester,
	boolean forward, DOMRange[] result) {
	IDOMPosition startRef = null, endRef = null;

	while (position != null && position.getContainerNode() != ancester) {
	Node container = position.getContainerNode();
	if (container instanceof Text) {
	// splitText will move the position up one level
	position = splitText(position);
	} else {
	// skip those nodes that can't have the style applied.
	position = skip(position, forward);
	Node sibling = position.getSibling(forward);
	if (sibling != null) {
	List needMove = new ArrayList();
	while (sibling != null) {
	needMove.add(sibling);
	sibling = forward ? sibling.getNextSibling() : sibling
	.getPreviousSibling();
	}

	// ok, there is nodes that need the style
	Element newEle = createStyleElement();
	container.insertBefore(newEle, position
	.getNextSiblingNode());
	for (int i = 0, size = needMove.size(); i < size; i++) {
	newEle.appendChild((Node) needMove.get(i));
	}
	if (startRef == null) {
	startRef = new DOMRefPosition(newEle, !forward);
	}
	endRef = new DOMRefPosition(newEle, forward);
	}
	// move the position up one level
	position = new DOMRefPosition(container, forward);
	}
	}
	if (startRef == null) {
	result[0] = null;
	} else {
	result[0] = forward ? new DOMRange(startRef, endRef)
	: new DOMRange(endRef, startRef);
	}
	return position;
	}

	/**
	* @param position
	* @return
	*/
	private IDOMPosition splitText(IDOMPosition position) {
	Text text = (Text) position.getContainerNode();
	int offset = position.getOffset();
	if (offset <= 0) {
	return new DOMRefPosition(text, false);
	} else if (offset >= text.getData().length()) {
	return new DOMRefPosition(text, true);
	} else {
	text.splitText(offset);
	return new DOMRefPosition(text, true);
	}
	}

	/**
	* @param start
	* @param end
	* @param common
	*/
	private DOMRange doTextNodeStyleApply(Text textNode, int startOffset,
	int endOffset) {
	String data = textNode.getData();
	String before = data.substring(0, startOffset);
	String middle = data.substring(startOffset, endOffset);
	String tail = data.substring(endOffset);

	Text middleText = getModel().getDocument().createTextNode(middle);

	// case 1: normal one
	if (!isEmptyString(before) && !isEmptyString(tail)) {
	Node parent = textNode.getParentNode();
	parent.insertBefore(
	getModel().getDocument().createTextNode(before), textNode);
	Element bnode = createStyleElement();
	bnode.appendChild(middleText);
	parent.insertBefore(bnode, textNode);
	textNode.setNodeValue(tail);
	}

	if (isEmptyString(before) && !isEmptyString(tail)) {
	Node sibling = textNode.getPreviousSibling();
	if (sibling != null
	&& sibling.getNodeName().equalsIgnoreCase(getTag())) {
	sibling.appendChild(middleText);
	} else {
	Node parent = textNode.getParentNode();
	parent.insertBefore(getModel().getDocument().createTextNode(
	before), textNode);
	Element bnode = createStyleElement();
	bnode.appendChild(middleText);
	parent.insertBefore(bnode, textNode);
	}
	textNode.setNodeValue(tail);
	}

	if (!isEmptyString(before) && isEmptyString(tail)) {
	Node sibling = textNode.getNextSibling();
	textNode.setNodeValue(before);
	if (sibling != null
	&& sibling.getNodeName().equalsIgnoreCase(getTag())) {
	sibling.insertBefore(middleText, sibling.getFirstChild());
	} else {
	Element bnode = createStyleElement();
	bnode.appendChild(middleText);
	textNode.getParentNode().insertBefore(bnode, sibling);
	}
	}

	if (isEmptyString(before) && isEmptyString(tail)) {

	Node previousSibling = textNode.getPreviousSibling();
	Node nextSibling = textNode.getNextSibling();
	//
	if (getTag().equalsIgnoreCase(IHTMLConstants.TAG_P)) {
	Element bnode = createStyleElement();
	bnode.appendChild(middleText);
	textNode.getParentNode().insertBefore(bnode, textNode);
	textNode.getParentNode().removeChild(textNode);
	}
	//
	else {
	if (previousSibling != null
	&& previousSibling.getNodeName().equalsIgnoreCase(
	getTag()) && nextSibling != null
	&& nextSibling.getNodeName().equalsIgnoreCase(getTag())) {
	previousSibling.appendChild(middleText);
	while (nextSibling.getFirstChild() != null) {
	previousSibling
	.appendChild(nextSibling.getFirstChild());
	}
	nextSibling.getParentNode().removeChild(nextSibling);
	} else if (previousSibling != null
	&& previousSibling.getNodeName().equalsIgnoreCase(
	getTag())) {
	previousSibling.appendChild(middleText);
	} else if (nextSibling != null
	&& nextSibling.getNodeName().equalsIgnoreCase(getTag())) {
	nextSibling.insertBefore(middleText, nextSibling
	.getFirstChild());
	} else {
	Element bnode = createStyleElement();
	bnode.appendChild(middleText);
	textNode.getParentNode().insertBefore(bnode, textNode);
	}
	textNode.getParentNode().removeChild(textNode);
	}
	}

	return new DOMRange(new DOMRefPosition(middleText, false),
	new DOMRefPosition(middleText, true));
	}

	private boolean isEmptyString(String str) {
	if (str == null \|\| str.length() == 0) {
	return true;
	}
	return false;
	}

	/**
	* @return
	*/
	protected Element createStyleElement() {
	if (_applyingNode != null) {
	return _applyingNode;
	} else {
	Element element = getModel().getDocument().createElement(getTag());
	if (_cssProperty != null && _cssPropertyValue != null) {
	element.setAttribute(_cssProperty, _cssPropertyValue);
	}
	return element;
	}
	}

	/**
	* @param position
	* @param b
	* @return
	*/
	private IDOMPosition skip(IDOMPosition position, boolean forward) {
	Node node = position.getSibling(forward);

	if (node == null) {
	return position;
	}
	boolean canSkip = false;
	if (node instanceof Text) {
	canSkip = ((IDOMText) node).isElementContentWhitespace();
	} else if (node instanceof Element) {
	if (getTag().equalsIgnoreCase(((Element) node).getTagName())) {
	canSkip = true;
	} else {
	canSkip = false;
	}
	} else {
	canSkip = true;
	}
	if (canSkip) {
	return new DOMRefPosition(node, forward);
	} else {
	return position;
	}
	}

	/**
	* @return Returns the _cssProperty.
	*/
	public final String getCssProperty() {
	return _cssProperty;
	}

	/**
	* @param property
	* The _cssProperty to set.
	*/
	public final void setCssProperty(String property) {
	_cssProperty = property;
	}

	/**
	* @return Returns the _cssPropertyValue.
	*/
	public final String getCssPropertyValue() {
	return _cssPropertyValue;
	}

	/**
	* @param propertyValue
	* The _cssPropertyValue to set.
	*/
	public final void setCssPropertyValue(String propertyValue) {
	_cssPropertyValue = propertyValue;
	}

	/**
	* @return Returns the _tag.
	*/
	public final String getTag() {
	if (_tag != null) {
	return _tag;
	} else {
	return _applyingNode.getNodeName();
	}
	}

	/**
	* @param _tag
	* The _tag to set.
	*/
	public final void setTag(String _tag) {
	this._tag = _tag;
	}

	private void updateStyleElement() {

	}
	}