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/*
* Copyright (C) 2004-2012 Geometer Plus <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#ifndef __HTMLREADER_H__
#define __HTMLREADER_H__
#include <string>
#include <vector>
#include <ZLEncodingConverter.h>
#include "../EncodedTextReader.h"
class ZLInputStream;
class HtmlReader : public EncodedTextReader {
public:
struct HtmlAttribute {
std::string Name;
std::string Value;
bool HasValue;
HtmlAttribute(const std::string &name);
~HtmlAttribute();
void setValue(const std::string &value);
};
struct HtmlTag {
std::string Name;
std::size_t Offset;
bool Start;
std::vector<HtmlAttribute> Attributes;
HtmlTag();
~HtmlTag();
void addAttribute(const std::string &name);
void setLastAttributeValue(const std::string &value);
private:
HtmlTag(const HtmlTag&);
const HtmlTag &operator = (const HtmlTag&);
};
private:
static void setTag(HtmlTag &tag, const std::string &fullName);
public:
virtual void readDocument(ZLInputStream &stream);
protected:
HtmlReader(const std::string &encoding);
virtual ~HtmlReader();
protected:
virtual void startDocumentHandler() = 0;
virtual void endDocumentHandler() = 0;
// returns false iff processing must be stopped
virtual bool tagHandler(const HtmlTag &tag) = 0;
// returns false iff processing must be stopped
virtual bool characterDataHandler(const char *text, std::size_t len, bool convert) = 0;
private:
void appendString(std::string &to, std::string &from);
};
inline HtmlReader::HtmlAttribute::HtmlAttribute(const std::string &name) : Name(name), HasValue(false) {}
inline HtmlReader::HtmlAttribute::~HtmlAttribute() {}
inline void HtmlReader::HtmlAttribute::setValue(const std::string &value) { Value = value; HasValue = true; }
inline HtmlReader::HtmlTag::HtmlTag() : Start(true) {}
inline HtmlReader::HtmlTag::~HtmlTag() {}
inline void HtmlReader::HtmlTag::addAttribute(const std::string &name) { Attributes.push_back(HtmlAttribute(name)); }
inline void HtmlReader::HtmlTag::setLastAttributeValue(const std::string &value) { if (!Attributes.empty()) Attributes.back().setValue(value); }
#endif /* __HTMLREADER_H__ */
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