/*******************************************************************************
* 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);
}
}