#ifndef IO_MGR_H_
#define IO_MGR_H_
/*
* This program source code file is part of KICAD, a free EDA CAD application.
*
* Copyright (C) 2011 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
* Copyright (C) 2011 Kicad Developers, see change_log.txt for contributors.
*
* 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.
*
* This program 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 this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <richio.h>
#include <hashtables.h>
class BOARD;
class PLUGIN;
/**
* Class IO_MGR
* is a factory which returns an instance of a PLUGIN.
*/
class IO_MGR
{
public:
/**
* Enum PCB_FILE_T
* is a set of file types that the IO_MGR knows about, and for which there
* has been a plugin written.
*/
enum PCB_FILE_T
{
KICAD,
// add your type here.
// EAGLE,
// ALTIUM,
// etc.
};
/**
* Function PluginFind
* returns a PLUGIN which the caller can use to import, export, save, or load
* design documents. The returned PLUGIN, may be reference counted, so please
* call PluginRelease() when you are done using the returned PLUGIN. It may or
* may not be code running from a DLL/DSO.
*
* @param aFileType is from PCB_FILE_T and tells which plugin to find.
*
* @return PLUGIN* - the plugin corresponding to aFileType or NULL if not found.
* Caller owns the returned object, and must call PluginRelease when done using it.
*/
static PLUGIN* PluginFind( PCB_FILE_T aFileType );
/**
* Function PluginRelease
* releases a PLUGIN back to the system, and may cause it to be unloaded from memory.
*
* @param aPlugin is the one to be released, and which is no longer usable
* after calling this.
*/
static void PluginRelease( PLUGIN* aPlugin );
/**
* Function ShowType
* returns a brief name for a plugin, given aFileType enum.
*/
static const wxString ShowType( PCB_FILE_T aFileType );
/**
* Function Load
* finds the requested PLUGIN and if found, calls the PLUGIN->Load(..) funtion
* on it using the arguments passed to this function. After the PLUGIN->Load()
* function returns, the PLUGIN is Released() as part of this call.
*
* @param aFileType is the PCB_FILE_T of file to load.
*
* @param aFileName is the name of the file to load.
*
* @param aAppendToMe is an existing BOARD to append to, use NULL if fresh
* board load is wanted.
*
* @param aProperties is an associative array that allows the caller to
* pass additional tuning parameters to the PLUGIN.
*
* @return BOARD* - caller owns it, never NULL because exception thrown if error.
*
* @throw IO_ERROR if the PLUGIN cannot be found, file cannot be found,
* or file cannot be loaded.
*/
static BOARD* Load( PCB_FILE_T aFileType, const wxString& aFileName,
BOARD* aAppendToMe = NULL, PROPERTIES* aProperties = NULL );
/**
* Function Save
* will write either a full aBoard to a storage file in a format that this
* implementation knows about, or it can be used to write a portion of
* aBoard to a special kind of export file.
*
* @param aFileType is the PCB_FILE_T of file to save.
*
* @param aFileName is the name of a file to save to on disk.
* @param aBoard is the BOARD document (data tree) to save or export to disk.
*
* @param aBoard is the in memory document tree from which to extract information
* when writing to \a aFileName. The caller continues to own the BOARD, and
* the plugin should refrain from modifying the BOARD if possible.
*
* @param aProperties is an associative array that can be used to tell the
* saver how to save the file, because it can take any number of
* additional named tuning arguments that the plugin is known to support.
* The caller continues to own this object (plugin may not delete it), and
* plugins should expect it to be optionally NULL.
*
* @throw IO_ERROR if there is a problem saving or exporting.
*/
static void Save( PCB_FILE_T aFileType, const wxString& aFileName,
BOARD* aBoard, PROPERTIES* aProperties = NULL );
};
/**
* Class PLUGIN
* is a base class that BOARD loading and saving plugins should derive from.
* Implementations can provide either Load() or Save() functions, or both.
* PLUGINs throw exceptions, so it is best that you wrap your calls to these
* functions in a try catch block.
*
* <pre>
* try
* {
* IO_MGR::Load(...);
* or
* IO_MGR::Save(...);
* }
* catch( IO_ERROR ioe )
* {
* // grab text from ioe, show in error window.
* }
* </pre>
*/
class PLUGIN
{
public:
//-----<PUBLIC PLUGIN API>-------------------------------------------------
/**
* Function PluginName
* returns a brief hard coded name for this PLUGIN.
*/
virtual const wxString& PluginName() = 0;
/**
* Function Load
* loads a board file, or a portion of one, from some input file format
* that this PLUGIN implementation knows about. This may be used to load an
* entire new BOARD, or to augment an existing one if \a aAppendToMe is not NULL.
*
* @param aFileName is the name of the file to use as input and may be foreign in
* nature or native in nature.
*
* @param aAppendToMe is an existing BOARD to append to, but if NULL then
* this means "do not append, rather load anew".
*
* @param aProperties is an associative array that can be used to tell the
* loader how to load the file, because it can take any number of
* additional named arguments that the plugin is known to support. These are
* tuning parameters for the import or load. The caller continues to own
* this object (plugin may not delete it), and plugins should expect it to
* be optionally NULL.
*
* @return BOARD* - the successfully loaded board, or the same one as aAppendToMe
* if aAppendToMe was not NULL, and caller owns it.
*
* @throw IO_ERROR if there is a problem loading, and its contents should
* say what went wrong, using line number and character offsets of the
* input file if possible.
*/
virtual BOARD* Load( const wxString& aFileName, BOARD* aAppendToMe,
PROPERTIES* aProperties = NULL );
/**
* Function Save
* will write a full aBoard to a storage file in a format that this
* PLUGIN implementation knows about, or it can be used to write a portion of
* aBoard to a special kind of export file.
*
* @param aFileName is the name of a file to save to on disk.
*
* @param aBoard is the class BOARD in memory document tree from which to
* extract information when writing to \a aFileName. The caller continues to
* own the BOARD, and the plugin should refrain from modifying the BOARD if possible.
*
* @param aProperties is an associative array that can be used to tell the
* saver how to save the file, because it can take any number of
* additional named tuning arguments that the plugin is known to support.
* The caller continues to own this object (plugin may not delete it),
* and plugins should expect it to be optionally NULL.
*
* @throw IO_ERROR if there is a problem saving or exporting.
*/
virtual void Save( const wxString& aFileName, BOARD* aBoard,
PROPERTIES* aProperties = NULL );
//-----</PUBLIC PLUGIN API>------------------------------------------------
/* The compiler writes the "zero argument" constructor for a PLUGIN
automatically if you do not provide one. If you decide you need to
provide a zero argument constructor of your own design, that is allowed.
It must be public, and it is what the IO_MGR uses. Parameters may be
passed into a PLUGIN via the PROPERTIES variable for either Save() and Load().
*/
virtual ~PLUGIN() {}
/**
* Class RELEASER
* releases a PLUGIN in the context of a potential thrown exception, through
* its destructor.
*/
class RELEASER
{
PLUGIN* plugin;
public:
RELEASER( PLUGIN* aPlugin = NULL ) :
plugin( aPlugin )
{
}
~RELEASER()
{
if( plugin )
IO_MGR::PluginRelease( plugin );
}
operator PLUGIN* ()
{
return plugin;
}
PLUGIN* operator -> ()
{
return plugin;
}
};
};
#if 0
//-----<SCHEMATIC STUFF>------------------------------------------------
// Should split into schematic specific PLUGIN base type
class SCHEMATIC;
/**
* Function Load
* loads a file from some special input file format that
* only this implementation knows about.
* @param aFileName is the name of the file to load and may be foreign in nature or native in nature.
* @param aAppendToMe is an existing SCHEMATIC to append to but may be NULL.
*/
virtual SCHEMATIC* Load( const wxString& aFileName, SCHEMATIC* aAppendToMe,
PROPERTIES* aProperties = NULL )
{
// not pure virtual so that plugins only have to implement
// Load() or Save() but not both.
}
/**
* Function Save
* will write aSchematic to a storage file in a format that only this
* implementation knows about.
*
* @param aFileName is the name of a file to save to on disk.
*
* @param aBoard is the SCHEMATIC document (ram data tree) to save or export to disk.
*/
virtual void Save( const wxString* aFileName, SCHEMATIC* aSchematic,
PROPERTIES* aProperties = NULL )
{
// not pure virtual so that plugins only have to implement
// Load() or Save() but not both.
}
//-----</SCHEMATIC STUFF>----------------------------------------------
#endif
#endif // IO_MGR_H_