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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* 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/.
*/
#ifndef __ORCUS_SAX_TOKEN_PARSER_HPP__
#define __ORCUS_SAX_TOKEN_PARSER_HPP__
#include <vector>
#include <algorithm>
#include <functional>
#include "types.hpp"
#include "sax_ns_parser.hpp"
namespace orcus {
namespace sax {
#if ORCUS_DEBUG_SAX_PARSER
template<typename _Attr, typename _Tokens>
class attr_printer : public ::std::unary_function<_Attr, void>
{
public:
attr_printer(const _Tokens& tokens, const ::std::string& indent) :
m_tokens(tokens), m_indent(indent) {}
void operator() (const _Attr& attr) const
{
using namespace std;
cout << m_indent << " attribute: "
<< attr.ns << ":"
<< m_tokens.get_token_name(attr.name) << "=\""
<< attr.value.str() << "\"" << endl;
}
private:
const _Tokens& m_tokens;
::std::string m_indent;
};
#endif
}
/**
* Element properties passed to its handler via start_element() and
* end_element() calls.
*/
struct sax_token_parser_element
{
xmlns_id_t ns;
xml_token_t name;
std::vector<xml_token_attr_t> attrs;
};
/**
* XML parser that tokenizes element and attribute names while parsing.
*/
template<typename _Handler, typename _Tokens>
class sax_token_parser
{
public:
typedef _Handler handler_type;
typedef _Tokens tokens_map;
sax_token_parser(const char* content, const size_t size, const tokens_map& tokens, xmlns_context& ns_cxt, handler_type& handler);
~sax_token_parser();
void parse();
private:
/**
* Re-route callbacks from the internal sax_parser into the token_parser
* callbacks.
*/
class handler_wrapper
{
sax_token_parser_element m_elem;
const tokens_map& m_tokens;
handler_type& m_handler;
public:
handler_wrapper(const tokens_map& tokens, handler_type& handler) :
m_tokens(tokens), m_handler(handler) {}
void doctype(const sax::doctype_declaration&) {}
void start_declaration(const pstring&) {}
void end_declaration(const pstring&)
{
m_elem.attrs.clear();
}
void start_element(const sax_ns_parser_element& elem)
{
m_elem.ns = elem.ns;
m_elem.name = tokenize(elem.name);
m_handler.start_element(m_elem);
m_elem.attrs.clear();
}
void end_element(const sax_ns_parser_element& elem)
{
m_elem.ns = elem.ns;
m_elem.name = tokenize(elem.name);
m_handler.end_element(m_elem);
}
void characters(const pstring& val, bool transient)
{
m_handler.characters(val, transient);
}
void attribute(const pstring& /*name*/, const pstring& /*val*/)
{
// Right now we don't process XML declaration.
}
void attribute(const sax_ns_parser_attribute& attr)
{
m_elem.attrs.push_back(
xml_token_attr_t(
attr.ns, tokenize(attr.name), attr.value, attr.transient));
}
private:
xml_token_t tokenize(const pstring& name) const
{
xml_token_t token = XML_UNKNOWN_TOKEN;
if (!name.empty())
token = m_tokens.get_token(name);
return token;
}
};
private:
xmlns_context& m_ns_cxt;
handler_wrapper m_wrapper;
sax_ns_parser<handler_wrapper> m_parser;
};
template<typename _Handler, typename _Tokens>
sax_token_parser<_Handler,_Tokens>::sax_token_parser(
const char* content, const size_t size, const tokens_map& tokens, xmlns_context& ns_cxt, handler_type& handler) :
m_ns_cxt(ns_cxt),
m_wrapper(tokens, handler),
m_parser(content, size, m_ns_cxt, m_wrapper)
{
}
template<typename _Handler, typename _Tokens>
sax_token_parser<_Handler,_Tokens>::~sax_token_parser()
{
}
template<typename _Handler, typename _Tokens>
void sax_token_parser<_Handler,_Tokens>::parse()
{
m_parser.parse();
}
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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