/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.web.css.sac;
import org.w3c.css.sac.AttributeCondition;
import org.w3c.css.sac.CSSException;
import org.w3c.css.sac.CombinatorCondition;
import org.w3c.css.sac.Condition;
import org.w3c.css.sac.ConditionalSelector;
import org.w3c.css.sac.DescendantSelector;
import org.w3c.css.sac.DocumentHandler;
import org.w3c.css.sac.ElementSelector;
import org.w3c.css.sac.InputSource;
import org.w3c.css.sac.LexicalUnit;
import org.w3c.css.sac.SACMediaList;
import org.w3c.css.sac.Selector;
import org.w3c.css.sac.SelectorList;
import org.w3c.css.sac.SimpleSelector;
import java.io.IOException;
import java.io.Writer;
/**
* @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
* @version $Revision$
*/
public class SerializationDocumentHandler extends AbstractDocumentHandler implements DocumentHandler
{
private final Writer writer;
public SerializationDocumentHandler(Writer writer)
{
this.writer = writer;
}
public void startDocument(InputSource source) throws CSSException
{
}
public void endDocument(InputSource source) throws CSSException
{
}
public void comment(String text) throws CSSException
{
}
public void importStyle(String uri, SACMediaList media, String defaultNamespaceURI) throws CSSException
{
write("@import \"");
write(uri);
write("\";\n");
}
public void startSelector(SelectorList selectors) throws CSSException
{
for (int i = 0; i < selectors.getLength(); i++)
{
Selector selector = selectors.item(i);
if (i > 0)
{
write(",");
}
write(selector);
}
write(" {\n");
}
public void endSelector(SelectorList selectors) throws CSSException
{
write("}\n");
}
public void property(String name, LexicalUnit value, boolean important) throws CSSException
{
write(name);
write(": ");
write(value, " ");
write(";\n");
}
private void write(LexicalUnit lu, String separator)
{
String prefix = "";
for (LexicalUnit current = lu; current != null; current = current.getNextLexicalUnit())
{
write(prefix);
write(current);
prefix = separator;
}
}
private void write(LexicalUnit lu)
{
short type = lu.getLexicalUnitType();
switch (type)
{
case LexicalUnit.SAC_URI :
write("url(");
write(lu.getStringValue());
write(")");
break;
case LexicalUnit.SAC_STRING_VALUE :
write('"');
write(lu.getStringValue());
write('"');
break;
case LexicalUnit.SAC_IDENT :
write(lu.getStringValue());
break;
case LexicalUnit.SAC_REAL :
write(lu.getFloatValue());
break;
case LexicalUnit.SAC_PIXEL :
write(lu.getFloatValue());
write("px");
break;
case LexicalUnit.SAC_MILLIMETER :
write(lu.getFloatValue());
write("mm");
break;
case LexicalUnit.SAC_CENTIMETER :
write(lu.getFloatValue());
write("cm");
break;
case LexicalUnit.SAC_PERCENTAGE :
write(lu.getFloatValue());
write("%");
break;
case LexicalUnit.SAC_POINT :
write(lu.getFloatValue());
write("pt");
break;
case LexicalUnit.SAC_EM :
write(lu.getFloatValue());
write("em");
break;
case LexicalUnit.SAC_INTEGER :
write(lu.getIntegerValue());
break;
case LexicalUnit.SAC_FUNCTION :
write(lu.getFunctionName());
write("(");
write(lu.getParameters(), "");
write(")");
break;
case LexicalUnit.SAC_RGBCOLOR :
write("rgb(");
write(lu.getParameters(), "");
write(")");
break;
case LexicalUnit.SAC_OPERATOR_COMMA :
write(",");
break;
case LexicalUnit.SAC_INHERIT :
write("inherit");
break;
default :
throw new UnsupportedOperationException("Lexical unit type " + type + " is not handled");
}
}
private void write(Condition condition)
{
switch (condition.getConditionType())
{
case Condition.SAC_PSEUDO_CLASS_CONDITION : {
AttributeCondition pseudoClassCond = (AttributeCondition)condition;
write(":");
write(pseudoClassCond.getValue());
break;
}
case Condition.SAC_CLASS_CONDITION : {
AttributeCondition classCond = (AttributeCondition)condition;
write(".");
write(classCond.getValue());
break;
}
case Condition.SAC_ATTRIBUTE_CONDITION : {
AttributeCondition attributeCond = (AttributeCondition)condition;
write("[");
write(attributeCond.getLocalName());
write("=");
write(attributeCond.getValue());
write("]");
break;
}
case Condition.SAC_AND_CONDITION : {
CombinatorCondition andCond = (CombinatorCondition)condition;
Condition first = andCond.getFirstCondition();
Condition second = andCond.getSecondCondition();
write(first);
write(second);
break;
}
case Condition.SAC_ID_CONDITION : {
AttributeCondition idCond = (AttributeCondition)condition;
write("#");
write(idCond.getValue());
break;
}
default :
throw new UnsupportedOperationException("condition type = " + condition.getConditionType() + " with class "
+ condition.getClass().getName());
}
}
private void write(Selector sel)
{
switch (sel.getSelectorType())
{
case Selector.SAC_CONDITIONAL_SELECTOR : {
ConditionalSelector conditionalSel = (ConditionalSelector)sel;
Condition condition = conditionalSel.getCondition();
SimpleSelector simpleSel = conditionalSel.getSimpleSelector();
write(simpleSel);
write(condition);
break;
}
case Selector.SAC_CHILD_SELECTOR : {
DescendantSelector childSel = (DescendantSelector)sel;
Selector ancestorSel = childSel.getAncestorSelector();
SimpleSelector simpleSel = childSel.getSimpleSelector();
//
if (simpleSel.getSelectorType() == Selector.SAC_PSEUDO_ELEMENT_SELECTOR)
{
ElementSelector elementSel = (ElementSelector)simpleSel;
write(ancestorSel);
write(":");
write(elementSel.getLocalName());
}
else
{
write(ancestorSel);
write(">");
write(simpleSel);
}
break;
}
case Selector.SAC_DESCENDANT_SELECTOR : {
DescendantSelector descendantSel = (DescendantSelector)sel;
SimpleSelector simpleSel = descendantSel.getSimpleSelector();
write(descendantSel.getAncestorSelector());
//
if (simpleSel.getSelectorType() == Selector.SAC_PSEUDO_ELEMENT_SELECTOR)
{
ElementSelector pseudoElementSel = (ElementSelector)simpleSel;
write(":");
write(pseudoElementSel.getLocalName());
}
else
{
write(" ");
write(simpleSel);
}
break;
}
case Selector.SAC_ELEMENT_NODE_SELECTOR : {
ElementSelector elementSel = (ElementSelector)sel;
//
if (elementSel.getLocalName() == null)
{
// Universal element selector * that we can omit
}
else
{
write(elementSel.getLocalName());
}
break;
}
default :
throw new UnsupportedOperationException("Selector type = " + sel.getSelectorType() + " with class "
+ sel.getClass().getName());
}
}
private void write(float f)
{
if (Math.floor(f) == f)
{
write((int)f);
}
else
{
write(Float.toString(f));
}
}
private void write(char c)
{
write(Character.toString(c));
}
private void write(int i)
{
write(Integer.toString(i));
}
private void write(String s)
{
try
{
writer.write(s);
writer.flush();
}
catch (IOException e)
{
throw new CSSException(e);
}
}
}