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/*
* This file is part of the API Extractor project.
*
* Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
*
* Contact: PySide team <contact@pyside.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include "docparser.h"
#include <QtCore/QDebug>
#include <QtXmlPatterns/QXmlQuery>
#include <QBuffer>
#include <cstdlib>
#include <libxslt/xsltutils.h>
#include <libxslt/transform.h>
DocParser::DocParser()
{
xmlSubstituteEntitiesDefault(1);
}
DocParser::~DocParser()
{
}
QString DocParser::getDocumentation(QXmlQuery& xquery, const QString& query,
const DocModificationList& mods) const
{
QString doc = execXQuery(xquery, query);
return applyDocModifications(mods, doc);
}
QString DocParser::execXQuery(QXmlQuery& xquery, const QString& query) const
{
QString escapedQuery(query);
// XQuery can't have invalid XML characters
escapedQuery.replace("&", "&").replace("<", "<");
xquery.setQuery(escapedQuery);
if (!xquery.isValid()) {
qWarning() << "Bad XQuery: " << escapedQuery;
return QString();
}
QString result;
xquery.evaluateTo(&result);
return result;
}
namespace
{
struct XslResources
{
xmlDocPtr xmlDoc;
xsltStylesheetPtr xslt;
xmlDocPtr xslResult;
XslResources() : xmlDoc(0), xslt(0), xslResult(0) {}
~XslResources()
{
if (xslt)
xsltFreeStylesheet(xslt);
if (xslResult)
xmlFreeDoc(xslResult);
if (xmlDoc)
xmlFreeDoc(xmlDoc);
xsltCleanupGlobals();
xmlCleanupParser();
}
};
} // namespace
QString DocParser::applyDocModifications(const DocModificationList& mods, const QString& xml) const
{
if (mods.isEmpty())
return xml;
bool hasXPathBasedModification = false;
foreach (DocModification mod, mods) {
if (mod.mode() == DocModification::XPathReplace) {
hasXPathBasedModification = true;
break;
}
}
if (!hasXPathBasedModification)
return xml;
QString xsl = QLatin1String("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n"
"<xsl:transform version=\"1.0\" xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\">\n"
"<xsl:template match=\"/\">\n"
" <xsl:apply-templates />\n"
"</xsl:template>\n"
"<xsl:template match=\"*\">\n"
"<xsl:copy>\n"
" <xsl:copy-of select=\"@*\"/>\n"
" <xsl:apply-templates/>\n"
"</xsl:copy>\n"
"</xsl:template>\n"
);
foreach (DocModification mod, mods) {
if (mod.mode() == DocModification::XPathReplace) {
xsl += QLatin1String("<xsl:template match=\"")
+ mod.xpath().replace("\"", """) + QLatin1String("\">")
+ mod.code() + QLatin1String("</xsl:template>\n");
}
}
xsl += QLatin1String("</xsl:transform>");
XslResources res;
// Read XML data
QByteArray xmlData = xml.toUtf8();
res.xmlDoc = xmlParseMemory(xmlData.constData(), xmlData.size());
if (!res.xmlDoc)
return xml;
// Read XSL data as a XML file
QByteArray xslData = xsl.toUtf8();
// xsltFreeStylesheet will delete this pointer
xmlDocPtr xslDoc = xmlParseMemory(xslData.constData(), xslData.size());
if (!xslDoc)
return xml;
// Parse XSL data
res.xslt = xsltParseStylesheetDoc(xslDoc);
if (!res.xslt)
return xml;
// Apply XSL
res.xslResult = xsltApplyStylesheet(res.xslt, res.xmlDoc, 0);
xmlChar* buffer = 0;
int bufferSize;
QString result;
if (!xsltSaveResultToString(&buffer, &bufferSize, res.xslResult, res.xslt)) {
result = QString::fromUtf8(reinterpret_cast<char*>(buffer), bufferSize);
std::free(buffer);
} else {
result = xml;
}
Q_ASSERT(result != xml);
return result;
}
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