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