/*
   Copyright (C) 1999-2006 Id Software, Inc. and contributors.
   For a list of contributors, see the accompanying CONTRIBUTORS file.

   This file is part of GtkRadiant.

   GtkRadiant 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.

   GtkRadiant 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 GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "shaders.h"

#include "ifilesystem.h"

#include "stream/stringstream.h"

#include "gtkdlgs.h"

void ViewShader( const char *pFile, const char *pName ){
	char* pBuff = 0;
	//int nSize =
	vfsLoadFile( pFile, reinterpret_cast<void**>( &pBuff ) );
	if ( pBuff == 0 ) {
		globalErrorStream() << "Failed to load shader file " << pFile << "\n";
		return;
	}
	// look for the shader declaration
	StringOutputStream strFind( string_length( pName ) );
	strFind << LowerCase( pName );
	StringOutputStream strLook( string_length( pBuff ) );
	strFind << LowerCase( pBuff );
	// offset used when jumping over commented out definitions
	std::size_t nOffset = 0;
	while ( true )
	{
		const char* substr = strstr( strFind.c_str() + nOffset, strFind.c_str() );
		if ( substr == 0 ) {
			break;
		}
		std::size_t nStart = substr - strLook.c_str();
		// we have found something, maybe it's a commented out shader name?
		char *strCheck = new char[string_length( strLook.c_str() ) + 1];
		strcpy( strCheck, strLook.c_str() );
		strCheck[nStart] = 0;
		char *pCheck = strrchr( strCheck, '\n' );
		// if there's a commentary sign in-between we'll continue
		if ( pCheck && strstr( pCheck, "//" ) ) {
			delete[] strCheck;
			nOffset = nStart + 1;
			continue;
		}
		delete[] strCheck;
		nOffset = nStart;
		break;
	}
	// now close the file
	vfsFreeFile( pBuff );

	DoTextEditor( pFile, static_cast<int>( nOffset ) );
}