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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include "internal/xml_parser.hxx"
#include "internal/i_xml_parser_event_handler.hxx"
#include <assert.h>
namespace /* private */
{
/* Extracts the local part of tag without
namespace decoration e.g. meta:creator -> creator */
const XML_Char COLON = (XML_Char)':';
const XML_Char* get_local_name(const XML_Char* rawname)
{
const XML_Char* p = rawname;
// go to the end
while (*p) p++;
// go back until the first ':'
while (*p != COLON && p > rawname)
p--;
// if we are on a colon one step forward
if (*p == COLON)
p++;
return p;
}
inline xml_parser* get_parser_instance(void* data)
{
return reinterpret_cast<xml_parser*>(XML_GetUserData(
reinterpret_cast<XML_Parser>(data)));
}
bool has_only_whitespaces(const XML_Char* s, int len)
{
const XML_Char* p = s;
for (int i = 0; i < len; i++)
if (*p++ != ' ') return false;
return true;
}
}
xml_parser::xml_parser(const XML_Char* EncodingName) :
document_handler_(0),
xml_parser_(XML_ParserCreate(EncodingName))
{
init();
}
xml_parser::~xml_parser()
{
XML_ParserFree(xml_parser_);
}
/* Callback functions will be called by the parser on
different events */
extern "C"
{
static void xml_start_element_handler(void* UserData, const XML_Char* name, const XML_Char** atts)
{
assert(UserData != NULL);
xml_parser* pImpl = get_parser_instance(UserData);
i_xml_parser_event_handler* pDocHdl = pImpl->get_document_handler();
if (pDocHdl)
{
xml_tag_attribute_container_t attributes;
int i = 0;
while(atts[i])
{
attributes[reinterpret_cast<const char_t*>(get_local_name(atts[i]))] = reinterpret_cast<const char_t*>(atts[i+1]);
i += 2; // skip to next pair
}
pDocHdl->start_element(
reinterpret_cast<const char_t*>(name), reinterpret_cast<const char_t*>(get_local_name(name)), attributes);
}
}
static void xml_end_element_handler(void* UserData, const XML_Char* name)
{
assert(UserData);
xml_parser* pImpl = get_parser_instance(UserData);
i_xml_parser_event_handler* pDocHdl = pImpl->get_document_handler();
if (pDocHdl)
pDocHdl->end_element(reinterpret_cast<const char_t*>(name), reinterpret_cast<const char_t*>(get_local_name(name)));
}
static void xml_character_data_handler(void* UserData, const XML_Char* s, int len)
{
assert(UserData);
xml_parser* pImpl = get_parser_instance(UserData);
i_xml_parser_event_handler* pDocHdl = pImpl->get_document_handler();
if (pDocHdl)
{
if (has_only_whitespaces(s,len))
pDocHdl->ignore_whitespace(string_t(reinterpret_cast<const char_t*>(s), len));
else
pDocHdl->characters(string_t(reinterpret_cast<const char_t*>(s), len));
}
}
static void xml_comment_handler(void* UserData, const XML_Char* Data)
{
assert(UserData);
xml_parser* pImpl = get_parser_instance(UserData);
i_xml_parser_event_handler* pDocHdl = pImpl->get_document_handler();
if (pDocHdl)
pDocHdl->comment(reinterpret_cast<const char_t*>(Data));
}
} // extern "C"
void xml_parser::init()
{
XML_SetUserData(xml_parser_, this);
// we use the parser as handler argument,
// so we could use it if necessary, the
// UserData are usable anyway using
// XML_GetUserData(...)
XML_UseParserAsHandlerArg(xml_parser_);
XML_SetElementHandler(
xml_parser_,
xml_start_element_handler,
xml_end_element_handler);
XML_SetCharacterDataHandler(
xml_parser_,
xml_character_data_handler);
XML_SetCommentHandler(
xml_parser_,
xml_comment_handler);
}
void xml_parser::parse(const char* XmlData, size_t Length, bool IsFinal)
{
if (0 == XML_Parse(xml_parser_, XmlData, Length, IsFinal))
throw xml_parser_exception(
(char*)XML_ErrorString(XML_GetErrorCode(xml_parser_)),
(int)XML_GetErrorCode(xml_parser_),
XML_GetCurrentLineNumber(xml_parser_),
XML_GetCurrentColumnNumber(xml_parser_),
XML_GetCurrentByteIndex(xml_parser_));
}
void xml_parser::set_document_handler(
i_xml_parser_event_handler* event_handler)
{
document_handler_ = event_handler;
}
i_xml_parser_event_handler* xml_parser::get_document_handler() const
{
return document_handler_;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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