bundles/org.eclipse.wst.css.core/src/org/eclipse/wst/css/core/internal/formatter/MediaRuleFormatter.java - sourceediting/webtools.sourceediting - Git at Google

 /*******************************************************************************
  * Copyright (c) 2004, 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.css.core.internal.formatter;


 import org.eclipse.jface.text.IRegion;
 import org.eclipse.wst.css.core.internal.CSSCorePlugin;
 import org.eclipse.wst.css.core.internal.cleanup.CSSCleanupStrategy;
 import org.eclipse.wst.css.core.internal.parserz.CSSRegionContexts;
 import org.eclipse.wst.css.core.internal.preferences.CSSCorePreferenceNames;
 import org.eclipse.wst.css.core.internal.provisional.document.ICSSNode;
 import org.eclipse.wst.css.core.internal.util.RegionIterator;
 import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion;
 import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
 import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
 import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion;
 import org.w3c.dom.stylesheets.MediaList;


 /**
  *
  */
 public class MediaRuleFormatter extends AbstractCSSSourceFormatter {

 	public final static java.lang.String MEDIA = "@media";//$NON-NLS-1$
 	private static MediaRuleFormatter instance;

 	/**
 	 *
 	 */
 	MediaRuleFormatter() {
 		super();
 	}

 	/**
 	 *
 	 */
 	protected void formatBefore(ICSSNode node, ICSSNode child, String toAppend, StringBuffer source, IRegion exceptFor) {
 		ICSSNode prev = (child != null) ? child.getPreviousSibling() : node.getLastChild();
 		int start = (prev != null) ? ((IndexedRegion) prev).getEndOffset() : 0;
 		int end = (child != null) ? ((IndexedRegion) child).getStartOffset() : 0;
 		if (start > 0 && start < end) { // source formatting
 			CSSCleanupStrategy stgy = getCleanupStrategy(node);

 			IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
 			// get meaning regions
 			CompoundRegion[] regions = null;
 			if (exceptFor == null)
 				regions = getRegionsWithoutWhiteSpaces(structuredDocument, new FormatRegion(start, end - start), stgy);
 			else {
 				String pickupType = null;
 				if ((prev != null && prev.getNodeType() == ICSSNode.MEDIALIST_NODE) || (prev == null && (child == null || child.getNodeType() != ICSSNode.MEDIALIST_NODE))) {
 					pickupType = CSSRegionContexts.CSS_LBRACE;
 				}
 				regions = getRegions(structuredDocument, new FormatRegion(start, end - start), exceptFor, pickupType);
 			}
 			// extract source
 			if (child != null && child.getNodeType() == ICSSNode.MEDIALIST_NODE && ((MediaList) child).getLength() > 0) { // between
 				// "@media" and mediatype
 				for (int i = 0; i < regions.length; i++) {
 					appendSpaceBefore(node, regions[i], source);
 					source.append(decoratedRegion(regions[i], 0, stgy)); // must
 					// be comments
 				}
 				appendSpaceBefore(node, toAppend, source);
 			} else if (child != null && (child.getPreviousSibling() == null || child.getPreviousSibling().getNodeType() == ICSSNode.MEDIALIST_NODE)) { // between
 				// mediatype and the first style rule
 				for (int i = 0; i < regions.length; i++) {
 					appendSpaceBefore(node, regions[i], source);
 					source.append(decoratedRegion(regions[i], 0, stgy)); // must
 					// be comments
 				}
 				appendDelimBefore(node, null, source);
 			} else { // between styles
 				for (int i = 0; i < regions.length; i++) {
 					appendDelimBefore(node, regions[i], source);
 					source.append(decoratedRegion(regions[i], 0, stgy)); // must
 					// be comments
 				}
 				appendDelimBefore(node, null, source);
 			}
 		} else { // source generation
 			if (child == null && prev != null && prev.getNodeType() != ICSSNode.MEDIALIST_NODE) { // after
 				// the last style rule
 				appendDelimBefore(node.getParentNode(), null, source);
 			} else if (child != null && child.getNodeType() == ICSSNode.MEDIALIST_NODE && ((MediaList) child).getLength() > 0) { // between
 				// "@media" and mediatype
 				appendSpaceBefore(node, toAppend, source);
 			} else if (prev != null && prev.getNodeType() == ICSSNode.MEDIALIST_NODE && ((MediaList) prev).getLength() > 0) { // between
 				// mediatype and the first style rule
 				appendSpaceBefore(node, "{", source);//$NON-NLS-1$
 				source.append("{");//$NON-NLS-1$
 				if (child != null)
 					appendDelimBefore(node, null, source);
 				else
 					appendDelimBefore(node.getParentNode(), null, source);
 			} else { // normal case
 				appendDelimBefore(node, null, source);
 			}
 		}

 	}

 	/**
 	 *
 	 */
 	protected void formatBefore(ICSSNode node, ICSSNode child, IRegion region, String toAppend, StringBuffer source) {
 		CSSCleanupStrategy stgy = getCleanupStrategy(node);

 		IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
 		CompoundRegion[] regions = getRegionsWithoutWhiteSpaces(structuredDocument, region, stgy);
 		CompoundRegion[] outside = getOutsideRegions(structuredDocument, region);
 		if (child != null && child.getNodeType() == ICSSNode.MEDIALIST_NODE) { // between
 			// "@media" and mediatype
 			for (int i = 0; i < regions.length; i++) {
 				if (i != 0 || needS(outside[0]))
 					appendSpaceBefore(node, regions[i], source);
 				source.append(decoratedRegion(regions[i], 0, stgy)); // must
 				// be comments
 			}
 			if (needS(outside[1]) && ((IndexedRegion) child).getStartOffset() == region.getOffset() + region.getLength()) {
 				appendSpaceBefore(node, toAppend, source);
 			}
 		} else if (child != null && (child.getPreviousSibling() == null || child.getPreviousSibling().getNodeType() == ICSSNode.MEDIALIST_NODE)) { // between
 			// mediatype and the first style rule
 			for (int i = 0; i < regions.length; i++) {
 				if (i != 0 || needS(outside[0]))
 					appendSpaceBefore(node, regions[i], source);
 				source.append(decoratedRegion(regions[i], 0, stgy)); // must
 				// be comments
 			}
 			if (needS(outside[1]) && ((IndexedRegion) child).getStartOffset() == region.getOffset() + region.getLength()) {
 				appendDelimBefore(node, null, source);
 			}
 		} else { // between styles
 			for (int i = 0; i < regions.length; i++) {
 				if (i != 0 || needS(outside[0]))
 					appendDelimBefore(node, regions[i], source);
 				source.append(decoratedRegion(regions[i], 0, stgy)); // must
 				// be comments
 			}
 			if (needS(outside[1]) && ((IndexedRegion) child).getStartOffset() == region.getOffset() + region.getLength()) {
 				appendDelimBefore(node, null, source);
 			}
 		}
 	}

 	/**
 	 *
 	 */
 	protected void formatPost(ICSSNode node, StringBuffer source) {
 		int end = ((IndexedRegion) node).getEndOffset();
 		int start = (node.getLastChild() != null && ((IndexedRegion) node.getLastChild()).getEndOffset() > 0) ? ((IndexedRegion) node.getLastChild()).getEndOffset() : getChildInsertPos(node);
 		if (end > 0 && start < end) { // source formatting
 			CSSCleanupStrategy stgy = getCleanupStrategy(node);

 			IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
 			CompoundRegion[] regions = getRegionsWithoutWhiteSpaces(structuredDocument, new FormatRegion(start, end - start), stgy);
 			if (node.getLastChild() == null || node.getLastChild().getNodeType() != ICSSNode.MEDIALIST_NODE) {
 				for (int i = 0; i < regions.length; i++) {
 					appendDelimBefore(node, regions[i], source);
 					source.append(decoratedRegion(regions[i], 0, stgy));
 				}
 			} else {
 				boolean bInCurlyBrace = false;
 				for (int i = 0; i < regions.length; i++) {
 					if (!bInCurlyBrace)
 						appendSpaceBefore(node, regions[i], source);
 					else
 						appendDelimBefore(node, regions[i], source);
 					source.append(decoratedRegion(regions[i], 0, stgy));
 					if (regions[i].getType() == CSSRegionContexts.CSS_LBRACE)
 						bInCurlyBrace = true;
 				}
 			}
 		} else { // source generation
 			String delim = getLineDelimiter(node);
 			if (node.getLastChild() != null && node.getLastChild().getNodeType() == ICSSNode.MEDIALIST_NODE) {
 				appendSpaceBefore(node, "{", source);//$NON-NLS-1$
 				source.append("{");//$NON-NLS-1$
 			}

 			source.append(delim);
 			source.append(getIndent(node));
 			source.append("}");//$NON-NLS-1$
 		}
 	}

 	/**
 	 *
 	 */
 	protected void formatPost(ICSSNode node, IRegion region, StringBuffer source) {
 		CSSCleanupStrategy stgy = getCleanupStrategy(node);

 		IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
 		CompoundRegion[] regions = getRegionsWithoutWhiteSpaces(structuredDocument, region, stgy);
 		CompoundRegion[] outside = getOutsideRegions(structuredDocument, region);
 		for (int i = 0; i < regions.length; i++) {
 			if (i != 0 || needS(outside[0]))
 				appendDelimBefore(node, regions[i], source);
 			source.append(decoratedRegion(regions[i], 0, stgy));
 		}
 	}

 	/**
 	 *
 	 */
 	protected void formatPre(ICSSNode node, StringBuffer source) {
 		int start = ((IndexedRegion) node).getStartOffset();
 		int end = (node.getFirstChild() != null && ((IndexedRegion) node.getFirstChild()).getEndOffset() > 0) ? ((IndexedRegion) node.getFirstChild()).getStartOffset() : getChildInsertPos(node);
 		ICSSNode child = node.getFirstChild();
 		if (child != null && (child instanceof MediaList) && ((MediaList) child).getLength() == 0) {
 			if (child.getNextSibling() != null)
 				end = ((IndexedRegion) child.getNextSibling()).getStartOffset();
 			else
 				end = -1;
 		}

 		if (end > 0) { // source formatting
 			CSSCleanupStrategy stgy = getCleanupStrategy(node);

 			IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
 			CompoundRegion[] regions = getRegionsWithoutWhiteSpaces(structuredDocument, new FormatRegion(start, end - start), stgy);
 			for (int i = 0; i < regions.length; i++) {
 				if (i != 0)
 					appendSpaceBefore(node, regions[i], source);
 				source.append(decoratedIdentRegion(regions[i], stgy));
 			}
 		} else { // source generation
 			String str = MEDIA;
 			if (CSSCorePlugin.getDefault().getPluginPreferences().getInt(CSSCorePreferenceNames.CASE_IDENTIFIER) == CSSCorePreferenceNames.UPPER)
 				str = MEDIA.toUpperCase();
 			source.append(str);
 		}

 		if (child != null && (child instanceof MediaList) && ((MediaList) child).getLength() > 0) {
 			appendSpaceBefore(node, "", source);//$NON-NLS-1$
 		}
 	}

 	/**
 	 *
 	 */
 	protected void formatPre(ICSSNode node, IRegion region, StringBuffer source) {
 		CSSCleanupStrategy stgy = getCleanupStrategy(node);

 		IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
 		CompoundRegion[] regions = getRegionsWithoutWhiteSpaces(structuredDocument, region, stgy);
 		CompoundRegion[] outside = getOutsideRegions(structuredDocument, region);
 		for (int i = 0; i < regions.length; i++) {
 			if (i != 0 || needS(outside[0]))
 				appendSpaceBefore(node, regions[i], source);
 			source.append(decoratedIdentRegion(regions[i], stgy));
 		}
 		if (needS(outside[1]) && !isIncludesPreEnd(node, region))
 			appendSpaceBefore(node, outside[1], source);
 	}

 	/**
 	 *
 	 */
 	public int getChildInsertPos(ICSSNode node) {
 		int n = ((IndexedRegion) node).getEndOffset();
 		if (n > 0) {
 			IStructuredDocumentRegion flatNode = node.getOwnerDocument().getModel().getStructuredDocument().getRegionAtCharacterOffset(n - 1);
 			if (flatNode.getRegionAtCharacterOffset(n - 1).getType() == CSSRegionContexts.CSS_LBRACE)
 				return n - 1;
 			return n;
 		}
 		return -1;
 	}

 	/**
 	 *
 	 */
 	public synchronized static MediaRuleFormatter getInstance() {
 		if (instance == null)
 			instance = new MediaRuleFormatter();
 		return instance;
 	}

 	/**
 	 *
 	 * @return int
 	 * @param node
 	 *            org.eclipse.wst.css.core.model.interfaces.ICSSNode
 	 * @param insertPos
 	 *            int
 	 */
 	public int getLengthToReformatAfter(ICSSNode node, int insertPos) {
 		if (node == null)
 			return 0;
 		IndexedRegion nnode = (IndexedRegion) node;
 		if (insertPos <= 0 || !nnode.contains(insertPos - 1))
 			return 0;

 		if (node.getFirstChild().getNextSibling() == node.getLastChild()) { // inserted
 			// first style rule
 			IStructuredDocumentRegion flatNode = node.getOwnerDocument().getModel().getStructuredDocument().getRegionAtCharacterOffset(insertPos);
 			if (flatNode == null)
 				return 0;
 			ITextRegion region = flatNode.getRegionAtCharacterOffset(insertPos);
 			if (region == null)
 				return 0;
 			RegionIterator it = new RegionIterator(flatNode, region);
 			while (it.hasNext()) {
 				region = it.next();
 				if (region.getType() == CSSRegionContexts.CSS_LBRACE)
 					break;
 				if (nnode.getEndOffset() <= it.getStructuredDocumentRegion().getEndOffset(region))
 					break;
 			}
 			int pos = it.getStructuredDocumentRegion().getStartOffset(region) - insertPos;
 			return (pos >= 0) ? pos : 0;

 		}
 		return super.getLengthToReformatAfter(node, insertPos);
 	}

 	/**
 	 *
 	 * @return int
 	 * @param node
 	 *            org.eclipse.wst.css.core.model.interfaces.ICSSNode
 	 * @param insertPos
 	 *            int
 	 */
 	public int getLengthToReformatBefore(ICSSNode node, int insertPos) {
 		if (node == null)
 			return 0;
 		IndexedRegion nnode = (IndexedRegion) node;
 		if (insertPos <= 0 || !nnode.contains(insertPos - 1))
 			return 0;

 		if (node.getFirstChild().getNextSibling() == node.getLastChild()) { // inserted
 			// first style rule
 			int pos = ((IndexedRegion) node.getFirstChild()).getEndOffset();
 			if (pos <= 0)
 				pos = ((IndexedRegion) node).getStartOffset() + 6 /*
 																	 * length
 																	 * of
 																	 * "@media"
 																	 */;
 			return insertPos - pos;
 		}
 		return super.getLengthToReformatBefore(node, insertPos);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2004, 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.css.core.internal.formatter;



	import org.eclipse.jface.text.IRegion;
	import org.eclipse.wst.css.core.internal.CSSCorePlugin;
	import org.eclipse.wst.css.core.internal.cleanup.CSSCleanupStrategy;
	import org.eclipse.wst.css.core.internal.parserz.CSSRegionContexts;
	import org.eclipse.wst.css.core.internal.preferences.CSSCorePreferenceNames;
	import org.eclipse.wst.css.core.internal.provisional.document.ICSSNode;
	import org.eclipse.wst.css.core.internal.util.RegionIterator;
	import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion;
	import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
	import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
	import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion;
	import org.w3c.dom.stylesheets.MediaList;


	/**
	*
	*/
	public class MediaRuleFormatter extends AbstractCSSSourceFormatter {

	public final static java.lang.String MEDIA = "@media";//$NON-NLS-1$
	private static MediaRuleFormatter instance;

	/**
	*
	*/
	MediaRuleFormatter() {
	super();
	}

	/**
	*
	*/
	protected void formatBefore(ICSSNode node, ICSSNode child, String toAppend, StringBuffer source, IRegion exceptFor) {
	ICSSNode prev = (child != null) ? child.getPreviousSibling() : node.getLastChild();
	int start = (prev != null) ? ((IndexedRegion) prev).getEndOffset() : 0;
	int end = (child != null) ? ((IndexedRegion) child).getStartOffset() : 0;
	if (start > 0 && start < end) { // source formatting
	CSSCleanupStrategy stgy = getCleanupStrategy(node);

	IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
	// get meaning regions
	CompoundRegion[] regions = null;
	if (exceptFor == null)
	regions = getRegionsWithoutWhiteSpaces(structuredDocument, new FormatRegion(start, end - start), stgy);
	else {
	String pickupType = null;
	if ((prev != null && prev.getNodeType() == ICSSNode.MEDIALIST_NODE) \|\| (prev == null && (child == null \|\| child.getNodeType() != ICSSNode.MEDIALIST_NODE))) {
	pickupType = CSSRegionContexts.CSS_LBRACE;
	}
	regions = getRegions(structuredDocument, new FormatRegion(start, end - start), exceptFor, pickupType);
	}
	// extract source
	if (child != null && child.getNodeType() == ICSSNode.MEDIALIST_NODE && ((MediaList) child).getLength() > 0) { // between
	// "@media" and mediatype
	for (int i = 0; i < regions.length; i++) {
	appendSpaceBefore(node, regions[i], source);
	source.append(decoratedRegion(regions[i], 0, stgy)); // must
	// be comments
	}
	appendSpaceBefore(node, toAppend, source);
	} else if (child != null && (child.getPreviousSibling() == null \|\| child.getPreviousSibling().getNodeType() == ICSSNode.MEDIALIST_NODE)) { // between
	// mediatype and the first style rule
	for (int i = 0; i < regions.length; i++) {
	appendSpaceBefore(node, regions[i], source);
	source.append(decoratedRegion(regions[i], 0, stgy)); // must
	// be comments
	}
	appendDelimBefore(node, null, source);
	} else { // between styles
	for (int i = 0; i < regions.length; i++) {
	appendDelimBefore(node, regions[i], source);
	source.append(decoratedRegion(regions[i], 0, stgy)); // must
	// be comments
	}
	appendDelimBefore(node, null, source);
	}
	} else { // source generation
	if (child == null && prev != null && prev.getNodeType() != ICSSNode.MEDIALIST_NODE) { // after
	// the last style rule
	appendDelimBefore(node.getParentNode(), null, source);
	} else if (child != null && child.getNodeType() == ICSSNode.MEDIALIST_NODE && ((MediaList) child).getLength() > 0) { // between
	// "@media" and mediatype
	appendSpaceBefore(node, toAppend, source);
	} else if (prev != null && prev.getNodeType() == ICSSNode.MEDIALIST_NODE && ((MediaList) prev).getLength() > 0) { // between
	// mediatype and the first style rule
	appendSpaceBefore(node, "{", source);//$NON-NLS-1$
	source.append("{");//$NON-NLS-1$
	if (child != null)
	appendDelimBefore(node, null, source);
	else
	appendDelimBefore(node.getParentNode(), null, source);
	} else { // normal case
	appendDelimBefore(node, null, source);
	}
	}

	}

	/**
	*
	*/
	protected void formatBefore(ICSSNode node, ICSSNode child, IRegion region, String toAppend, StringBuffer source) {
	CSSCleanupStrategy stgy = getCleanupStrategy(node);

	IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
	CompoundRegion[] regions = getRegionsWithoutWhiteSpaces(structuredDocument, region, stgy);
	CompoundRegion[] outside = getOutsideRegions(structuredDocument, region);
	if (child != null && child.getNodeType() == ICSSNode.MEDIALIST_NODE) { // between
	// "@media" and mediatype
	for (int i = 0; i < regions.length; i++) {
	if (i != 0 \|\| needS(outside[0]))
	appendSpaceBefore(node, regions[i], source);
	source.append(decoratedRegion(regions[i], 0, stgy)); // must
	// be comments
	}
	if (needS(outside[1]) && ((IndexedRegion) child).getStartOffset() == region.getOffset() + region.getLength()) {
	appendSpaceBefore(node, toAppend, source);
	}
	} else if (child != null && (child.getPreviousSibling() == null \|\| child.getPreviousSibling().getNodeType() == ICSSNode.MEDIALIST_NODE)) { // between
	// mediatype and the first style rule
	for (int i = 0; i < regions.length; i++) {
	if (i != 0 \|\| needS(outside[0]))
	appendSpaceBefore(node, regions[i], source);
	source.append(decoratedRegion(regions[i], 0, stgy)); // must
	// be comments
	}
	if (needS(outside[1]) && ((IndexedRegion) child).getStartOffset() == region.getOffset() + region.getLength()) {
	appendDelimBefore(node, null, source);
	}
	} else { // between styles
	for (int i = 0; i < regions.length; i++) {
	if (i != 0 \|\| needS(outside[0]))
	appendDelimBefore(node, regions[i], source);
	source.append(decoratedRegion(regions[i], 0, stgy)); // must
	// be comments
	}
	if (needS(outside[1]) && ((IndexedRegion) child).getStartOffset() == region.getOffset() + region.getLength()) {
	appendDelimBefore(node, null, source);
	}
	}
	}

	/**
	*
	*/
	protected void formatPost(ICSSNode node, StringBuffer source) {
	int end = ((IndexedRegion) node).getEndOffset();
	int start = (node.getLastChild() != null && ((IndexedRegion) node.getLastChild()).getEndOffset() > 0) ? ((IndexedRegion) node.getLastChild()).getEndOffset() : getChildInsertPos(node);
	if (end > 0 && start < end) { // source formatting
	CSSCleanupStrategy stgy = getCleanupStrategy(node);

	IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
	CompoundRegion[] regions = getRegionsWithoutWhiteSpaces(structuredDocument, new FormatRegion(start, end - start), stgy);
	if (node.getLastChild() == null \|\| node.getLastChild().getNodeType() != ICSSNode.MEDIALIST_NODE) {
	for (int i = 0; i < regions.length; i++) {
	appendDelimBefore(node, regions[i], source);
	source.append(decoratedRegion(regions[i], 0, stgy));
	}
	} else {
	boolean bInCurlyBrace = false;
	for (int i = 0; i < regions.length; i++) {
	if (!bInCurlyBrace)
	appendSpaceBefore(node, regions[i], source);
	else
	appendDelimBefore(node, regions[i], source);
	source.append(decoratedRegion(regions[i], 0, stgy));
	if (regions[i].getType() == CSSRegionContexts.CSS_LBRACE)
	bInCurlyBrace = true;
	}
	}
	} else { // source generation
	String delim = getLineDelimiter(node);
	if (node.getLastChild() != null && node.getLastChild().getNodeType() == ICSSNode.MEDIALIST_NODE) {
	appendSpaceBefore(node, "{", source);//$NON-NLS-1$
	source.append("{");//$NON-NLS-1$
	}

	source.append(delim);
	source.append(getIndent(node));
	source.append("}");//$NON-NLS-1$
	}
	}

	/**
	*
	*/
	protected void formatPost(ICSSNode node, IRegion region, StringBuffer source) {
	CSSCleanupStrategy stgy = getCleanupStrategy(node);

	IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
	CompoundRegion[] regions = getRegionsWithoutWhiteSpaces(structuredDocument, region, stgy);
	CompoundRegion[] outside = getOutsideRegions(structuredDocument, region);
	for (int i = 0; i < regions.length; i++) {
	if (i != 0 \|\| needS(outside[0]))
	appendDelimBefore(node, regions[i], source);
	source.append(decoratedRegion(regions[i], 0, stgy));
	}
	}

	/**
	*
	*/
	protected void formatPre(ICSSNode node, StringBuffer source) {
	int start = ((IndexedRegion) node).getStartOffset();
	int end = (node.getFirstChild() != null && ((IndexedRegion) node.getFirstChild()).getEndOffset() > 0) ? ((IndexedRegion) node.getFirstChild()).getStartOffset() : getChildInsertPos(node);
	ICSSNode child = node.getFirstChild();
	if (child != null && (child instanceof MediaList) && ((MediaList) child).getLength() == 0) {
	if (child.getNextSibling() != null)
	end = ((IndexedRegion) child.getNextSibling()).getStartOffset();
	else
	end = -1;
	}

	if (end > 0) { // source formatting
	CSSCleanupStrategy stgy = getCleanupStrategy(node);

	IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
	CompoundRegion[] regions = getRegionsWithoutWhiteSpaces(structuredDocument, new FormatRegion(start, end - start), stgy);
	for (int i = 0; i < regions.length; i++) {
	if (i != 0)
	appendSpaceBefore(node, regions[i], source);
	source.append(decoratedIdentRegion(regions[i], stgy));
	}
	} else { // source generation
	String str = MEDIA;
	if (CSSCorePlugin.getDefault().getPluginPreferences().getInt(CSSCorePreferenceNames.CASE_IDENTIFIER) == CSSCorePreferenceNames.UPPER)
	str = MEDIA.toUpperCase();
	source.append(str);
	}

	if (child != null && (child instanceof MediaList) && ((MediaList) child).getLength() > 0) {
	appendSpaceBefore(node, "", source);//$NON-NLS-1$
	}
	}

	/**
	*
	*/
	protected void formatPre(ICSSNode node, IRegion region, StringBuffer source) {
	CSSCleanupStrategy stgy = getCleanupStrategy(node);

	IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
	CompoundRegion[] regions = getRegionsWithoutWhiteSpaces(structuredDocument, region, stgy);
	CompoundRegion[] outside = getOutsideRegions(structuredDocument, region);
	for (int i = 0; i < regions.length; i++) {
	if (i != 0 \|\| needS(outside[0]))
	appendSpaceBefore(node, regions[i], source);
	source.append(decoratedIdentRegion(regions[i], stgy));
	}
	if (needS(outside[1]) && !isIncludesPreEnd(node, region))
	appendSpaceBefore(node, outside[1], source);
	}

	/**
	*
	*/
	public int getChildInsertPos(ICSSNode node) {
	int n = ((IndexedRegion) node).getEndOffset();
	if (n > 0) {
	IStructuredDocumentRegion flatNode = node.getOwnerDocument().getModel().getStructuredDocument().getRegionAtCharacterOffset(n - 1);
	if (flatNode.getRegionAtCharacterOffset(n - 1).getType() == CSSRegionContexts.CSS_LBRACE)
	return n - 1;
	return n;
	}
	return -1;
	}

	/**
	*
	*/
	public synchronized static MediaRuleFormatter getInstance() {
	if (instance == null)
	instance = new MediaRuleFormatter();
	return instance;
	}

	/**
	*
	* @return int
	* @param node
	* org.eclipse.wst.css.core.model.interfaces.ICSSNode
	* @param insertPos
	* int
	*/
	public int getLengthToReformatAfter(ICSSNode node, int insertPos) {
	if (node == null)
	return 0;
	IndexedRegion nnode = (IndexedRegion) node;
	if (insertPos <= 0 \|\| !nnode.contains(insertPos - 1))
	return 0;

	if (node.getFirstChild().getNextSibling() == node.getLastChild()) { // inserted
	// first style rule
	IStructuredDocumentRegion flatNode = node.getOwnerDocument().getModel().getStructuredDocument().getRegionAtCharacterOffset(insertPos);
	if (flatNode == null)
	return 0;
	ITextRegion region = flatNode.getRegionAtCharacterOffset(insertPos);
	if (region == null)
	return 0;
	RegionIterator it = new RegionIterator(flatNode, region);
	while (it.hasNext()) {
	region = it.next();
	if (region.getType() == CSSRegionContexts.CSS_LBRACE)
	break;
	if (nnode.getEndOffset() <= it.getStructuredDocumentRegion().getEndOffset(region))
	break;
	}
	int pos = it.getStructuredDocumentRegion().getStartOffset(region) - insertPos;
	return (pos >= 0) ? pos : 0;

	}
	return super.getLengthToReformatAfter(node, insertPos);
	}

	/**
	*
	* @return int
	* @param node
	* org.eclipse.wst.css.core.model.interfaces.ICSSNode
	* @param insertPos
	* int
	*/
	public int getLengthToReformatBefore(ICSSNode node, int insertPos) {
	if (node == null)
	return 0;
	IndexedRegion nnode = (IndexedRegion) node;
	if (insertPos <= 0 \|\| !nnode.contains(insertPos - 1))
	return 0;

	if (node.getFirstChild().getNextSibling() == node.getLastChild()) { // inserted
	// first style rule
	int pos = ((IndexedRegion) node.getFirstChild()).getEndOffset();
	if (pos <= 0)
	pos = ((IndexedRegion) node).getStartOffset() + 6 /*
	* length
	* of
	* "@media"
	*/;
	return insertPos - pos;
	}
	return super.getLengthToReformatBefore(node, insertPos);
	}
	}