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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include <xml_parser.hxx>
#include <i_xml_parser_event_handler.hxx>
#ifdef _WIN32
#include <utilities.hxx>
#else
#define UTF8ToWString(s) s
#endif
#include <assert.h>
namespace /* private */
{
/* Extracts the local part of tag without
namespace decoration e.g. meta:creator -> creator */
const XML_Char COLON = ':';
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;
}
xml_parser* get_parser_instance(void* data)
{
return static_cast<xml_parser*>(XML_GetUserData(
static_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() :
document_handler_(nullptr),
xml_parser_(XML_ParserCreate(nullptr))
{
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 != nullptr);
xml_parser* pImpl = get_parser_instance(UserData);
i_xml_parser_event_handler* pDocHdl = pImpl->get_document_handler();
if (!pDocHdl)
return;
xml_tag_attribute_container_t attributes;
int i = 0;
while(atts[i])
{
attributes[UTF8ToWString(reinterpret_cast<const char*>(get_local_name(atts[i])))] = UTF8ToWString(reinterpret_cast<const char*>(atts[i+1]));
i += 2; // skip to next pair
}
pDocHdl->start_element(
UTF8ToWString(reinterpret_cast<const char*>(name)), UTF8ToWString(reinterpret_cast<const char*>(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(UTF8ToWString(reinterpret_cast<const char*>(name)), UTF8ToWString(reinterpret_cast<const char*>(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(UTF8ToWString(std::string(reinterpret_cast<const char*>(s), len)));
else
pDocHdl->characters(UTF8ToWString(std::string(reinterpret_cast<const char*>(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(UTF8ToWString(reinterpret_cast<const char*>(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 (XML_STATUS_ERROR ==
XML_Parse(xml_parser_, XmlData, static_cast<int>(Length), IsFinal))
{
throw xml_parser_exception(
XML_ErrorString(XML_GetErrorCode(xml_parser_)));
}
}
void xml_parser::set_document_handler(
i_xml_parser_event_handler* event_handler)
{
document_handler_ = event_handler;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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