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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* XSL Transforming input and output classes
*
* Authors:
* Bob Jamison <ishmalius@gmail.com>
*
* Copyright (C) 2004-2008 Inkscape.org
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "xsltstream.h"
#include "stringstream.h"
#include <libxslt/transform.h>
namespace Inkscape
{
namespace IO
{
//#########################################################################
//# X S L T S T Y L E S H E E T
//#########################################################################
/**
*
*/
XsltStyleSheet::XsltStyleSheet(InputStream &xsltSource)
: stylesheet(nullptr)
{
if (!read(xsltSource)) {
throw StreamException("read failed");
}
}
/**
*
*/
XsltStyleSheet::XsltStyleSheet()
: stylesheet(nullptr)
{
}
/**
*
*/
bool XsltStyleSheet::read(InputStream &xsltSource)
{
StringOutputStream outs;
pipeStream(xsltSource, outs);
std::string strBuf = outs.getString().raw();
xmlDocPtr doc = xmlParseMemory(strBuf.c_str(), strBuf.size());
stylesheet = xsltParseStylesheetDoc(doc);
//following not necessary. handled by xsltFreeStylesheet(stylesheet);
//xmlFreeDoc(doc);
if (!stylesheet)
return false;
return true;
}
/**
*
*/
XsltStyleSheet::~XsltStyleSheet()
{
if (stylesheet)
xsltFreeStylesheet(stylesheet);
}
//#########################################################################
//# X S L T I N P U T S T R E A M
//#########################################################################
/**
*
*/
XsltInputStream::XsltInputStream(InputStream &xmlSource, XsltStyleSheet &sheet)
: BasicInputStream(xmlSource), stylesheet(sheet)
{
//Load the data
StringOutputStream outs;
pipeStream(source, outs);
std::string strBuf = outs.getString().raw();
//Do the processing
const char *params[1];
params[0] = nullptr;
xmlDocPtr srcDoc = xmlParseMemory(strBuf.c_str(), strBuf.size());
xmlDocPtr resDoc = xsltApplyStylesheet(stylesheet.stylesheet, srcDoc, params);
xmlDocDumpFormatMemory(resDoc, &outbuf, &outsize, 1);
outpos = 0;
//Free our mem
xmlFreeDoc(resDoc);
xmlFreeDoc(srcDoc);
}
/**
*
*/
XsltInputStream::~XsltInputStream()
{
xmlFree(outbuf);
}
/**
* Returns the number of bytes that can be read (or skipped over) from
* this input stream without blocking by the next caller of a method for
* this input stream.
*/
int XsltInputStream::available()
{
return outsize - outpos;
}
/**
* Closes this input stream and releases any system resources
* associated with the stream.
*/
void XsltInputStream::close()
{
closed = true;
}
/**
* Reads the next byte of data from the input stream. -1 if EOF
*/
int XsltInputStream::get()
{
if (closed)
return -1;
if (outpos >= outsize)
return -1;
int ch = (int) outbuf[outpos++];
return ch;
}
//#########################################################################
//# X S L T O U T P U T S T R E A M
//#########################################################################
/**
*
*/
XsltOutputStream::XsltOutputStream(OutputStream &dest, XsltStyleSheet &sheet)
: BasicOutputStream(dest), stylesheet(sheet)
{
flushed = false;
}
/**
*
*/
XsltOutputStream::~XsltOutputStream()
{
//do not automatically close
}
/**
* Closes this output stream and releases any system resources
* associated with this stream.
*/
void XsltOutputStream::close()
{
flush();
destination.close();
}
/**
* Flushes this output stream and forces any buffered output
* bytes to be written out.
*/
void XsltOutputStream::flush()
{
if (flushed)
{
destination.flush();
return;
}
//Do the processing
xmlChar *resbuf;
int resSize;
const char *params[1];
params[0] = nullptr;
xmlDocPtr srcDoc = xmlParseMemory(outbuf.raw().c_str(), outbuf.size());
xmlDocPtr resDoc = xsltApplyStylesheet(stylesheet.stylesheet, srcDoc, params);
xmlDocDumpFormatMemory(resDoc, &resbuf, &resSize, 1);
/*
xmlErrorPtr err = xmlGetLastError();
if (err)
{
throw StreamException(err->message);
}
*/
for (int i=0 ; i<resSize ; i++)
{
char ch = resbuf[i];
destination.put(ch);
}
//Free our mem
xmlFree(resbuf);
xmlFreeDoc(resDoc);
xmlFreeDoc(srcDoc);
destination.flush();
flushed = true;
}
/**
* Writes the specified byte to this output stream.
*/
int XsltOutputStream::put(char ch)
{
outbuf.push_back(ch);
return 1;
}
} // namespace IO
} // namespace Inkscape
//#########################################################################
//# E N D O F F I L E
//#########################################################################
|
