#ifndef IO_MGR_H_ #define IO_MGR_H_ /* * This program source code file is part of KICAD, a free EDA CAD application. * * Copyright (C) 2011-2012 SoftPLC Corporation, Dick Hollenbeck * Copyright (C) 2016-2017 Kicad Developers, see AUTHORS.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 #include #include #include class BOARD; class PLUGIN; class MODULE; class PROPERTIES; /** * 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 { LEGACY, ///< Legacy Pcbnew file formats prior to s-expression. KICAD_SEXP, ///< S-expression Pcbnew file format. EAGLE, PCAD, GEDA_PCB, ///< Geda PCB file formats. GITHUB, ///< Read only http://github.com repo holding pretty footprints // add your type here. // ALTIUM, // etc. FILE_TYPE_NONE }; /** * Class PLUGIN_REGISTRY * Holds a list of available plugins, created using a singleton REGISTER_PLUGIN object. * This way, plugins can be added link-time. */ class PLUGIN_REGISTRY { public: struct ENTRY { PCB_FILE_T m_type; std::function m_createFunc; wxString m_name; }; static PLUGIN_REGISTRY *Instance() { static PLUGIN_REGISTRY *self = nullptr; if( !self ) { self = new PLUGIN_REGISTRY; } return self; } void Register( PCB_FILE_T aType, const wxString& aName, std::function aCreateFunc ) { ENTRY ent; ent.m_type = aType; ent.m_createFunc = aCreateFunc; ent.m_name = aName; m_plugins.push_back( ent ); } PLUGIN* Create( PCB_FILE_T aFileType ) const { for( auto& ent : m_plugins ) { if ( ent.m_type == aFileType ) { return ent.m_createFunc(); } } return nullptr; } const std::vector& AllPlugins() const { return m_plugins; } private: std::vector m_plugins; }; /** * Class REGISTER_PLUGIN * Registers a plugin. Declare as a static variable in an anonymous namespace. * @param aType: type of the plugin * @param aName: name of the file format * @param aCreateFunc: function that creates a new object for the plugin. */ struct REGISTER_PLUGIN { REGISTER_PLUGIN( PCB_FILE_T aType, const wxString& aName, std::function aCreateFunc ) { PLUGIN_REGISTRY::Instance()->Register( aType, aName, aCreateFunc ); } }; /** * 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 EnumFromStr * returns the PCB_FILE_T from the corresponding plugin type name: "kicad", "legacy", etc. */ static PCB_FILE_T EnumFromStr( const wxString& aFileType ); /** * Function GetFileExtension * returns the file extension for \a aFileType. * * @param aFileType The #PCB_FILE_T type. * @return A wxString object containing the file extension for \a aFileType or an empty * string if \a aFileType is invalid. */ static const wxString GetFileExtension( PCB_FILE_T aFileType ); /** * Function GuessPluginTypeFromLibPath * returns a plugin type given a footprint library's libPath. */ static PCB_FILE_T GuessPluginTypeFromLibPath( const wxString& aLibPath ); /** * 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, const 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, const 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. Plugins throw exceptions because it is illegal * for them to have any user interface calls in them whatsoever, i.e. no windowing * or screen printing at all. * *
 *   try
 *   {
 *        IO_MGR::Load(...);
 *   or
 *        IO_MGR::Save(...);
 *   }
 *   catch( const IO_ERROR& ioe )
 *   {
 *        // grab text from ioe, show in error window.
 *   }
 * 
*/ class PLUGIN { public: //------------------------------------------------------ /** * Function PluginName * returns a brief hard coded name for this PLUGIN. */ virtual const wxString PluginName() const = 0; /** * Function GetFileExtension * returns the file extension for the PLUGIN. */ virtual const wxString GetFileExtension() const = 0; /** * Function Load * loads information from some input file format that this PLUGIN implementation * knows about, into either a new BOARD or an existing one. 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, const PROPERTIES* aProperties = NULL ); /** * Function Save * will write @a 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, const PROPERTIES* aProperties = NULL ); //---------------------------------- /** * Return a list of footprint names contained within the library at @a aLibraryPath. * * @param aLibraryPath is a locator for the "library", usually a directory, file, * or URL containing several footprints. * * @param aProperties is an associative array that can be used to tell the * plugin anything needed about how to perform with respect to @a aLibraryPath. * The caller continues to own this object (plugin may not delete it), and * plugins should expect it to be optionally NULL. * * @param aFootprintNames is the array of available footprint names inside a library. * * @throw IO_ERROR if the library cannot be found, or footprint cannot be loaded. */ virtual void FootprintEnumerate( wxArrayString& aFootprintNames, const wxString& aLibraryPath, const PROPERTIES* aProperties = NULL ); /** * Generate a timestamp representing all the files in the library (including the library * directory). * Timestamps should not be considered ordered; they either match or they don't. */ virtual long long GetLibraryTimestamp( const wxString& aLibraryPath ) const = 0; /** * Function PrefetchLib * If possible, prefetches the specified library (e.g. performing downloads). Does not parse. * Threadsafe. * * This is a no-op for libraries that cannot be prefetched. * * Plugins that cannot prefetch need not override this; a default no-op is provided. * * @param aLibraryPath is a locator for the "library", usually a directory, file, * or URL containing several footprints. * * @param aProperties is an associative array that can be used to tell the * plugin anything needed about how to perform with respect to @a aLibraryPath. * 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 an error prefetching the library. */ virtual void PrefetchLib( const wxString& aLibraryPath, const PROPERTIES* aProperties = NULL ); /** * Function FootprintLoad * loads a footprint having @a aFootprintName from the @a aLibraryPath containing * a library format that this PLUGIN knows about. * * @param aLibraryPath is a locator for the "library", usually a directory, file, * or URL containing several footprints. * * @param aFootprintName is the name of the footprint to load. * * @param aProperties is an associative array that can be used to tell the * loader implementation to do something special, 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. * * @return MODULE* - if found caller owns it, else NULL if not found. * * @throw IO_ERROR if the library cannot be found or read. No exception * is thrown in the case where aFootprintName cannot be found. */ virtual MODULE* FootprintLoad( const wxString& aLibraryPath, const wxString& aFootprintName, const PROPERTIES* aProperties = NULL ); /** * Function LoadEnumeratedFootprint * a version of FootprintLoad() for use after FootprintEnumerate() for more * efficient cache management. */ virtual MODULE* LoadEnumeratedFootprint( const wxString& aLibraryPath, const wxString& aFootprintName, const PROPERTIES* aProperties = NULL ); /** * Function FootprintSave * will write @a aModule to an existing library located at @a aLibraryPath. * If a footprint by the same name already exists, it is replaced. * * @param aLibraryPath is a locator for the "library", usually a directory, file, * or URL containing several footprints. * * @param aFootprint is what to store in the library. The caller continues * to own the footprint after this call. * * @param aProperties is an associative array that can be used to tell the * saver how to save the footprint, 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. */ virtual void FootprintSave( const wxString& aLibraryPath, const MODULE* aFootprint, const PROPERTIES* aProperties = NULL ); /** * Function FootprintDelete * deletes @a aFootprintName from the library at @a aLibraryPath. * * @param aLibraryPath is a locator for the "library", usually a directory, file, * or URL containing several footprints. * * @param aFootprintName is the name of a footprint to delete from the specified library. * * @param aProperties is an associative array that can be used to tell the * library delete function anything special, 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 finding the footprint or the library, or deleting it. */ virtual void FootprintDelete( const wxString& aLibraryPath, const wxString& aFootprintName, const PROPERTIES* aProperties = NULL ); /** * Function FootprintLibCreate * creates a new empty footprint library at @a aLibraryPath empty. It is an * error to attempt to create an existing library or to attempt to create * on a "read only" location. * * @param aLibraryPath is a locator for the "library", usually a directory, file, * or URL containing several footprints. * * @param aProperties is an associative array that can be used to tell the * library create function anything special, 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 finding the library, or creating it. */ virtual void FootprintLibCreate( const wxString& aLibraryPath, const PROPERTIES* aProperties = NULL ); /** * Function FootprintLibDelete * deletes an existing footprint library and returns true, or if library does not * exist returns false, or throws an exception if library exists but is read only or * cannot be deleted for some other reason. * * @param aLibraryPath is a locator for the "library", usually a directory * or file which will contain footprints. * * @param aProperties is an associative array that can be used to tell the * library delete implementation function anything special, 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. * * @return bool - true if library deleted, false if library did not exist. * * @throw IO_ERROR if there is a problem deleting an existing library. */ virtual bool FootprintLibDelete( const wxString& aLibraryPath, const PROPERTIES* aProperties = NULL ); /** * Function IsFootprintLibWritable * returns true iff the library at @a aLibraryPath is writable. (Often * system libraries are read only because of where they are installed.) * * @param aLibraryPath is a locator for the "library", usually a directory, file, * or URL containing several footprints. * * @throw IO_ERROR if no library at aLibraryPath exists. */ virtual bool IsFootprintLibWritable( const wxString& aLibraryPath ); /** * Function FootprintLibOptions * appends supported PLUGIN options to @a aListToAppenTo along with * internationalized descriptions. Options are typically appended so * that a derived PLUGIN can call its base class * function by the same name first, thus inheriting options declared there. * (Some base class options could pertain to all Footprint*() functions * in all derived PLUGINs.) Note that since aListToAppendTo is a PROPERTIES * object, all options will be unique and last guy wins. * * @param aListToAppendTo holds a tuple of *
option
This eventually is what shows up into the fp-lib-table "options" field, possibly combined with others.
internationalized description
The internationalized description is displayed in DIALOG_FP_PLUGIN_OPTIONS. * It may be multi-line and be quite explanatory of the option.
*
* In the future perhaps @a aListToAppendTo evolves to something capable of also * holding a wxValidator for the cells in said dialog: * http://forums.wxwidgets.org/viewtopic.php?t=23277&p=104180. This would require a 3 column list, and introducing wx GUI knowledge to PLUGIN, which has been avoided to date. */ virtual void FootprintLibOptions( PROPERTIES* aListToAppendTo ) const; //-----
------------------------------------------------ /* 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 any of the public API functions which take one. */ virtual ~PLUGIN() { //printf( "~%s", __func__ ); }; #ifndef SWIG /** * Class RELEASER * releases a PLUGIN in the context of a potential thrown exception, through * its destructor. */ class RELEASER { PLUGIN* plugin; // private assignment operator so it's illegal RELEASER& operator=( RELEASER& aOther ) { return *this; } // private copy constructor so it's illegal RELEASER( const RELEASER& aOther ) {} public: RELEASER( PLUGIN* aPlugin = NULL ) : plugin( aPlugin ) { } ~RELEASER() { if( plugin ) release(); } void release() { IO_MGR::PluginRelease( plugin ); plugin = NULL; } void set( PLUGIN* aPlugin ) { if( plugin ) release(); plugin = aPlugin; } operator PLUGIN* () const { return plugin; } PLUGIN* operator -> () const { return plugin; } }; #endif }; #endif // IO_MGR_H_