loader.h

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00001 // -*- C++ -*-
00002 
00003 /* 
00004  * Gnome Chemistry Utils
00005  * gcu/loader.h
00006  *
00007  * Copyright (C) 2007-2008 Jean Bréfort <jean.brefort@normalesup.org>
00008  *
00009  * This program is free software; you can redistribute it and/or 
00010  * modify it under the terms of the GNU General Public License as 
00011  * published by the Free Software Foundation; either version 2 of the
00012  * License, or (at your option) any later version.
00013  *
00014  * This program is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017  * GNU General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU General Public License
00020  * along with this program; if not, write to the Free Software
00021  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
00022  * USA
00023  */
00024 
00025 #ifndef GCU_LOADER_H
00026 #define GCU_LOADER_H
00027 
00028 #include <list>
00029 #include <map>
00030 #include <string>
00031 #include <goffice/app/io-context.h>
00032 #include <gsf/gsf-input.h>
00033 #include <gsf/gsf-output.h>
00034 
00036 namespace gcu {
00037 
00038 class Document;
00039 class Loader;
00040 
00046 typedef struct {
00050         Loader *loader;
00054         bool read;
00058         bool write;
00062         bool supports2D;
00066         bool supports3D;
00070         bool supportsCrystals;
00074         bool supportsSpectra;
00075 } LoaderStruct;
00076 
00142 class Loader
00143 {
00144 public:
00149         Loader ();
00154         virtual ~Loader ();
00155 
00156         // static methods
00161         static void Init ();
00170         static bool GetFirstLoader (std::map<std::string, LoaderStruct>::iterator &it);
00177         static bool GetNextLoader (std::map<std::string, LoaderStruct>::iterator &it);
00182         static Loader *GetLoader (char const *mime_type);
00187         static Loader *GetSaver (char const *mime_type);
00188 
00189         // virtual methods
00201         virtual bool Read (Document *doc, GsfInput *in, char const *mime_type, IOContext *io);
00213         virtual bool Write (Document *doc, GsfOutput *out, char const *mime_type, IOContext *io);
00214 
00215 protected:
00221         void AddMimeType (const char *mime_type);
00227         void RemoveMimeType (const char *mime_type);
00228 
00229 private:
00230         static bool Inited;
00231 
00232 protected:
00236         std::list<std::string> MimeTypes;
00237 };
00238 
00239 }
00240 
00241 #endif  //      GCU_LOADER_H

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