/*
* eXist Open Source Native XML Database
* Copyright (C) 2008-2010 The eXist Project
* http://exist-db.org
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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 program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.xslt.expression;
import org.exist.interpreter.ContextAtExist;
import org.exist.memtree.MemTreeBuilder;
import org.exist.memtree.NodeImpl;
import org.exist.xquery.AnalyzeContextInfo;
import org.exist.xquery.Expression;
import org.exist.xquery.XPathException;
import org.exist.xquery.util.ExpressionDumper;
import org.exist.xquery.value.Item;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.StringValue;
import org.exist.xslt.XSLContext;
import org.w3c.dom.Attr;
/**
* <!-- Category: instruction -->
* <xsl:text
* [disable-output-escaping]? = "yes" | "no">
* <!-- Content: #PCDATA -->
* </xsl:text>
*
* @author <a href="mailto:shabanovd@gmail.com">Dmitriy Shabanov</a>
*
*/
public class Text extends SimpleConstructor {
private String text = null;
private Boolean disable_output_escaping = null;
private boolean isWhitespaceOnly = false;
public Text(XSLContext context) {
super(context);
}
public Text(XSLContext context, String text) throws XPathException {
super(context);
this.text = text;
}
public void setToDefaults() {
disable_output_escaping = null;
sequenceItSelf = false;
}
public void prepareAttribute(ContextAtExist context, Attr attr) throws XPathException {
String attr_name = attr.getLocalName();
if (attr_name.equals(DISABLE_OUTPUT_ESCAPING)) {
disable_output_escaping = getBoolean(attr.getValue());
}
}
public void analyze(AnalyzeContextInfo contextInfo) throws XPathException {
if (text == null) {
isWhitespaceOnly = false;
super.analyze(contextInfo);
} else {
isWhitespaceOnly = true;
this.text = StringValue.expand(text);
for(int i = 0; i < text.length(); i++)
if(!isWhiteSpace(text.charAt(i))) {
isWhitespaceOnly = false;
break;
}
}
}
//TODO: The text node does not have an ancestor element that has an xml:space attribute with a value of preserve, unless there is a closer ancestor element having an xml:space attribute with a value of default.
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
if(isWhitespaceOnly) // && context.stripWhitespace())
return Sequence.EMPTY_SEQUENCE;
if (sequenceItSelf) {
if (text != null)
return new StringValue(text);
getContext().setStripWhitespace(false);
for (Expression expr : steps) {
if (expr instanceof Text) {
return new StringValue(((Text) expr).text);
}
throw new XPathException("unsupported subelement");
}
getContext().setStripWhitespace(true);
}
if (newDocumentContext)
context.pushDocumentContext();
try {
MemTreeBuilder builder = context.getDocumentBuilder();
context.proceed(this, builder);
int nodeNr = builder.characters(text);
NodeImpl node = builder.getDocument().getNode(nodeNr);
return node;
} finally {
if (newDocumentContext)
context.popDocumentContext();
}
// return super.eval(contextSequence, contextItem);
}
/* (non-Javadoc)
* @see org.exist.xquery.Expression#dump(org.exist.xquery.util.ExpressionDumper)
*/
public void dump(ExpressionDumper dumper) {
dumper.display("<xsl:text");
if (disable_output_escaping != null) {
dumper.display(" disable_output_escaping = ");
dumper.display(disable_output_escaping);
}
dumper.display(">");
super.dump(dumper);
dumper.display("</xsl:text>");
}
public String toString() {
StringBuilder result = new StringBuilder();
result.append("<xsl:text");
if (disable_output_escaping != null)
result.append(" disable_output_escaping = "+disable_output_escaping.toString());
result.append("> ");
result.append(super.toString());
result.append("</xsl:text> ");
return result.toString();
}
@Override
public boolean allowMixedNodesInReturn() {
return true;
}
protected final static boolean isWhiteSpace(char ch) {
return (ch == 0x20) || (ch == 0x09) || (ch == 0xD) || (ch == 0xA);
}
}