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/*
* This source file is part of libRocket, the HTML/CSS Interface Middleware
*
* For the latest information, see http://www.librocket.com
*
* Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#ifndef ROCKETCOREXMLPARSER_H
#define ROCKETCOREXMLPARSER_H
#include <stack>
#include "Header.h"
#include "BaseXMLParser.h"
namespace Rocket {
namespace Core {
class DocumentHeader;
class Element;
class XMLNodeHandler;
/**
Rocket's XML parsing engine. The factory creates an instance of this class for each RML parse.
@author Lloyd Weehuizen
*/
class ROCKETCORE_API XMLParser : public BaseXMLParser
{
public:
XMLParser(Element* root);
~XMLParser();
/// Registers a custom node handler to be used to a given tag.
/// @param[in] tag The tag the custom parser will handle.
/// @param[in] handler The custom handler.
/// @return The registered XML node handler.
static XMLNodeHandler* RegisterNodeHandler(const String& tag, XMLNodeHandler* handler);
/// Releases all registered node handlers. This is called internally.
static void ReleaseHandlers();
/// Returns the XML document's header.
/// @return The document header.
DocumentHeader* GetDocumentHeader();
/// Returns the source URL of this parse.
/// @return The URL of the parsing stream.
const URL& GetSourceURL() const;
// The parse stack.
struct ParseFrame
{
// Tag being parsed.
String tag;
// Element representing this frame.
Element* element;
// Handler used for this frame.
XMLNodeHandler* node_handler;
// The default handler used for this frame's children.
XMLNodeHandler* child_handler;
};
/// Pushes an element handler onto the parse stack for parsing child elements.
/// @param[in] tag The tag the handler was registered with.
/// @return True if an appropriate handler was found and pushed onto the stack, false if not.
bool PushHandler(const String& tag);
/// Pushes the default element handler onto the parse stack.
void PushDefaultHandler();
/// Access the current parse frame.
/// @return The parser's current parse frame.
const ParseFrame* GetParseFrame() const;
protected:
/// Called when the parser finds the beginning of an element tag.
virtual void HandleElementStart(const String& name, const XMLAttributes& attributes);
/// Called when the parser finds the end of an element tag.
virtual void HandleElementEnd(const String& name);
/// Called when the parser encounters data.
virtual void HandleData(const String& data);
private:
// The header of the document being parsed.
DocumentHeader* header;
// The active node handler.
XMLNodeHandler* active_handler;
// The parser stack.
typedef std::stack< ParseFrame > ParserStack;
ParserStack stack;
};
}
}
#endif
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