package org.pdf4j.saxon.style;
import org.pdf4j.saxon.expr.Expression;
import org.pdf4j.saxon.instruct.Executable;
import org.pdf4j.saxon.om.AttributeCollection;
import org.pdf4j.saxon.om.NamePool;
import org.pdf4j.saxon.om.QNameException;
import org.pdf4j.saxon.om.StandardNames;
import org.pdf4j.saxon.pattern.*;
import org.pdf4j.saxon.trans.Mode;
import org.pdf4j.saxon.trans.XPathException;
import org.pdf4j.saxon.type.Type;
import java.util.StringTokenizer;
/**
* An xsl:preserve-space or xsl:strip-space elements in stylesheet. <br>
*/
public class XSLPreserveSpace extends StyleElement {
private String elements;
public void prepareAttributes() throws XPathException {
AttributeCollection atts = getAttributeList();
for (int a=0; a<atts.getLength(); a++) {
int nc = atts.getNameCode(a);
String f = getNamePool().getClarkName(nc);
if (f==StandardNames.ELEMENTS) {
elements = atts.getValue(a);
} else {
checkUnknownAttribute(nc);
}
}
if (elements==null) {
reportAbsence("elements");
elements="*"; // for error recovery
}
}
public void validate() throws XPathException {
checkEmpty();
checkTopLevel(null);
}
public Expression compile(Executable exec) throws XPathException
{
Boolean preserve = Boolean.valueOf(getFingerprint() == StandardNames.XSL_PRESERVE_SPACE);
Mode stripperRules = getPrincipalStylesheet().getStripperRules();
// elements is a space-separated list of element names
StringTokenizer st = new StringTokenizer(elements, " \t\n\r", false);
while (st.hasMoreTokens()) {
String s = st.nextToken();
NodeTestPattern pat = new NodeTestPattern();
// following information is used in conflict warnings
pat.setOriginalText(s);
pat.setSystemId(getSystemId());
pat.setLineNumber(getLineNumber());
NodeTest nt;
if (s.equals("*")) {
nt = AnyNodeTest.getInstance();
pat.setNodeTest(nt);
stripperRules.addRule(
pat,
preserve,
getPrecedence(),
-0.5, true);
} else if (s.endsWith(":*")) {
if (s.length()==2) {
compileError("No prefix before ':*'");
}
String prefix = s.substring(0, s.length()-2);
String uri = getURIForPrefix(prefix, false);
nt = new NamespaceTest(
getNamePool(),
Type.ELEMENT,
uri);
pat.setNodeTest(nt);
stripperRules.addRule(
pat,
preserve,
getPrecedence(),
-0.25, true);
} else if (s.startsWith("*:")) {
if (s.length()==2) {
compileError("No local name after '*:'");
}
String localname = s.substring(2);
nt = new LocalNameTest(
getNamePool(),
Type.ELEMENT,
localname);
pat.setNodeTest(nt);
stripperRules.addRule(
pat,
preserve,
getPrecedence(),
-0.25, true);
} else {
String prefix;
String localName = null;
String uri = null;
try {
String[] parts = getConfiguration().getNameChecker().getQNameParts(s);
prefix = parts[0];
if (parts[0].equals("")) {
uri = getDefaultXPathNamespace();
} else {
uri = getURIForPrefix(prefix, false);
if (uri == null) {
undeclaredNamespaceError(prefix, "XTSE0280");
return null;
}
}
localName = parts[1];
} catch (QNameException err) {
compileError("Element name " + s + " is not a valid QName", "XTSE0280");
return null;
}
NamePool target = getNamePool();
int nameCode = target.allocate("", uri, localName);
nt = new NameTest(Type.ELEMENT, nameCode, getNamePool());
pat.setNodeTest(nt);
stripperRules.addRule(
pat,
preserve,
getPrecedence(),
0, true);
}
}
return null;
}
}
//
// The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
// you may not use this file except in compliance with the License. You may obtain a copy of the
// License at http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is Michael H. Kay.
//
// Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
// Contributor(s): none.
//