/*******************************************************************************
* Copyright (c) 2004, 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.wst.css.core.internal.formatter;
import org.eclipse.core.runtime.Preferences;
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.ICSSAttr;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSCharsetRule;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSNode;
import org.eclipse.wst.css.core.internal.util.CSSUtil;
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;
/**
*
*/
public class CharsetRuleFormatter extends DefaultCSSSourceFormatter {
public final static java.lang.String CHARSET = "@charset";//$NON-NLS-1$
private static CharsetRuleFormatter instance;
/**
*
*/
CharsetRuleFormatter() {
super();
}
/**
*
*/
public StringBuffer formatAttrChanged(ICSSNode node, ICSSAttr attr, boolean insert, AttrChangeContext context) {
StringBuffer buf = new StringBuffer();
if (node == null || attr == null)
return buf;
if (!ICSSCharsetRule.ENCODING.equalsIgnoreCase(attr.getName()))
return buf;
// get region to replace
if (context != null && ((IndexedRegion) node).getEndOffset() > 0) {
if (attr != null && ((IndexedRegion) attr).getEndOffset() > 0) {
IStructuredDocumentRegion flatNode = node.getOwnerDocument().getModel().getStructuredDocument().getRegionAtCharacterOffset(((IndexedRegion) attr).getStartOffset());
ITextRegion region = flatNode.getRegionAtCharacterOffset(((IndexedRegion) attr).getStartOffset());
RegionIterator it = new RegionIterator(flatNode, region);
it.prev();
if (it.hasPrev()) {
ITextRegion prev = it.prev();
if (prev.getType() == CSSRegionContexts.CSS_S)
context.start = it.getStructuredDocumentRegion().getStartOffset(prev);
else
context.start = it.getStructuredDocumentRegion().getStartOffset(region);
} else
context.start = it.getStructuredDocumentRegion().getStartOffset(region);
context.end = it.getStructuredDocumentRegion().getEndOffset(region);
} else {
IStructuredDocumentRegion flatNode = node.getOwnerDocument().getModel().getStructuredDocument().getRegionAtCharacterOffset(((IndexedRegion) node).getEndOffset() - 1);
ITextRegion region = flatNode.getRegionAtCharacterOffset(((IndexedRegion) node).getEndOffset() - 1);
if (region.getType() == CSSRegionContexts.CSS_S) {
context.start = flatNode.getStartOffset(region);
context.end = flatNode.getStartOffset(region);
} else {
context.start = flatNode.getEndOffset() + 1;
context.end = flatNode.getEndOffset();
}
}
}
// generate text
if (insert) {
appendSpaceBefore(node, attr.getValue(), buf);
buf.append(attr.getValue());
}
return buf;
}
/**
*
*/
protected void formatPre(ICSSNode node, StringBuffer source) {
int end = ((IndexedRegion) node).getEndOffset();
if (end > 0) { // format source
int start = ((IndexedRegion) node).getStartOffset();
formatPre(node, new FormatRegion(start, end - start), source);
} else { // generate source
Preferences preferences = CSSCorePlugin.getDefault().getPluginPreferences();
String quote = preferences.getString(CSSCorePreferenceNames.FORMAT_QUOTE);
String str = CHARSET;
if (preferences.getInt(CSSCorePreferenceNames.CASE_IDENTIFIER) == CSSCorePreferenceNames.UPPER)
str = CHARSET.toUpperCase();
source.append(str);
String enc = ((ICSSCharsetRule) node).getEncoding();
quote = CSSUtil.detectQuote(enc, quote);
str = quote + ((enc != null) ? enc : "") + quote + ";";//$NON-NLS-1$ //$NON-NLS-2$
appendSpaceBefore(node, str, source);
source.append(str);
}
}
/**
*
*/
protected void formatPre(ICSSNode node, IRegion region, StringBuffer source) {
IStructuredDocument structuredDocument = node.getOwnerDocument().getModel().getStructuredDocument();
CSSCleanupStrategy stgy = getCleanupStrategy(node);
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])) && !regions[i].getType().equals(CSSRegionContexts.CSS_DELIMITER))
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 getAttrInsertPos(ICSSNode node, String attrName) {
if (node == null || attrName == null || attrName.length() == 0)
return -1;
CSSCleanupStrategy stgy = getCleanupStrategy(node);
if (!ICSSCharsetRule.ENCODING.equalsIgnoreCase(attrName))
return -1;
ICSSAttr attr = (ICSSAttr) node.getAttributes().getNamedItem(ICSSCharsetRule.ENCODING);
if (attr != null && ((IndexedRegion) attr).getEndOffset() > 0)
return ((IndexedRegion) attr).getStartOffset();
IndexedRegion iNode = (IndexedRegion) node;
if (iNode.getEndOffset() <= 0)
return -1;
CompoundRegion regions[] = getRegionsWithoutWhiteSpaces(node.getOwnerDocument().getModel().getStructuredDocument(), new FormatRegion(iNode.getStartOffset(), iNode.getEndOffset() - iNode.getStartOffset()), stgy);
for (int i = regions.length - 1; i >= 0; i--) {
if (regions[i].getType() != CSSRegionContexts.CSS_COMMENT)
return regions[i].getStartOffset();
}
return iNode.getEndOffset();
}
/**
*
*/
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_DELIMITER)
return n - 1;
return n;
}
return -1;
}
/**
*
*/
public synchronized static CharsetRuleFormatter getInstance() {
if (instance == null)
instance = new CharsetRuleFormatter();
return instance;
}
}