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// Copyright (C) 2000-2003, Luca Padovani <luca.padovani@cs.unibo.it>.
//
// This file is part of GtkMathView, a Gtk widget for MathML.
//
// GtkMathView 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.
//
// GtkMathView 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 GtkMathView; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// For details, see the GtkMathView World-Wide-Web page,
// http://helm.cs.unibo.it/mml-widget, or send a mail to
// <luca.padovani@cs.unibo.it>
#ifndef __TemplateReaderRefinementContext_hh__
#define __TemplateReaderRefinementContext_hh__
#include <list>
#include "Attribute.hh"
#include "AttributeSet.hh"
template <class Reader>
class TemplateReaderRefinementContext
{
public:
TemplateReaderRefinementContext(void) { }
SmartPtr<Attribute>
get(const class AttributeSignature& sig) const
{
for (typename std::list<Context>::const_iterator p = context.begin(); p != context.end(); p++)
{
const Context& c = *p;
if (SmartPtr<Attribute> attr = c.attributes->get(ATTRIBUTE_ID_OF_SIGNATURE(sig)))
return attr;
else if (const String* rawValue = c.get(sig.name))
{
SmartPtr<Attribute> attr = Attribute::create(sig, *rawValue);
c.attributes->set(attr);
return attr;
}
}
return 0;
}
void
push(const SmartPtr<Reader>& reader)
{
assert(reader);
context.push_front(Context(reader));
}
void pop(void)
{
assert(!context.empty());
context.pop_front();
}
private:
struct Context
{
typedef std::pair<String, String> RawAttribute;
Context(const SmartPtr<Reader>& reader) : attributes(AttributeSet::create())
{
for (int index = 0; index < reader->getAttributeCount(); index++)
{
String namespaceURI;
String name;
String value;
reader->getAttribute(index, namespaceURI, name, value);
if (namespaceURI.empty()) rawAttributes.push_back(RawAttribute(name, value));
}
}
const String* get(const String& name) const
{
for (std::vector<RawAttribute>::const_iterator p = rawAttributes.begin(); p != rawAttributes.end(); p++)
if (p->first == name) return &p->second;
return 0;
}
std::vector<std::pair<String, String> > rawAttributes;
SmartPtr<AttributeSet> attributes;
};
std::list<Context> context;
};
#endif // __TemplateReaderRefinementContext_hh__
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