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//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
//
// copyright            : (C) 2008 by Eran Ifrah
// file name            : context_manager.cpp
//
// -------------------------------------------------------------------------
// A
//              _____           _      _     _ _
//             /  __ \         | |    | |   (_) |
//             | /  \/ ___   __| | ___| |    _| |_ ___
//             | |    / _ \ / _  |/ _ \ |   | | __/ _ )
//             | \__/\ (_) | (_| |  __/ |___| | ||  __/
//              \____/\___/ \__,_|\___\_____/_|\__\___|
//
//                                                  F i l e
//
//    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.
//
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
#include <wx/tokenzr.h>
#include "context_manager.h"
#include "context_cpp.h"
#include "context_diff.h"
#include "context_base.h"
#include "generic_context.h"
#include "editor_config.h"

ContextManager::ContextManager()
{
	// register available contexts
	m_contextPool[wxT("C++")] = new ContextCpp();
    m_contextPool[wxT("Diff")] = new ContextDiff();

	// load generic lexers
	EditorConfig::ConstIterator iter = EditorConfigST::Get()->LexerBegin();
    for(; iter != EditorConfigST::Get()->LexerEnd(); iter++){
		LexerConfPtr lex = iter->second;
        if (m_contextPool.find(lex->GetName()) == m_contextPool.end()) {
            m_contextPool[lex->GetName()] = new ContextGeneric(lex->GetName());
		}
	}

    // make sure there is a "fallback" lexer for unrecognized file types
    if (m_contextPool.find(wxT("Text")) == m_contextPool.end()) {
        m_contextPool[wxT("Text")] = new ContextGeneric(wxT("Text"));
    }
}

ContextManager::~ContextManager()
{
}

ContextBasePtr ContextManager::NewContext(LEditor *parent, const wxString &lexerName)
{
	// this function is actually a big switch ....
	std::map<wxString, ContextBasePtr>::iterator iter = m_contextPool.find(lexerName);
	if( iter == m_contextPool.end()){
		return m_contextPool[wxT("Text")]->NewInstance(parent);
	}

	return iter->second->NewInstance((LEditor*)parent);
}

ContextBasePtr ContextManager::NewContextByFileName (LEditor *parent, const wxFileName &fileName)
{
	EditorConfig::ConstIterator iter = EditorConfigST::Get()->LexerBegin();
	for ( ; iter != EditorConfigST::Get()->LexerEnd(); iter++ ) {
		LexerConfPtr lexer = iter->second;
		wxString lexExt = lexer->GetFileSpec();
		wxStringTokenizer tkz ( lexExt, wxT ( ";" ) );
		while ( tkz.HasMoreTokens() ) {
			wxString ext      = tkz.NextToken();
			wxString fullname = fileName.GetFullName();

			ext.MakeLower(); fullname.MakeLower();
			if ( wxMatchWild ( ext, fullname ) ) {
				return ContextManager::Get()->NewContext ( parent, lexer->GetName() );
			}
		}
	}

	// return the default context
	return ContextManager::Get()->NewContext ( parent, wxT ( "Text" ) );
}