kicad/pcbnew/swig/python_scripting.cpp

683 lines
19 KiB
C++

/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2012 NBEE Embedded Systems, Miguel Angel Ajo <miguelangel@nbee.es>
* Copyright (C) 1992-2019 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
*/
/**
* @file python_scripting.cpp
* @brief methods to add scripting capabilities inside pcbnew
*/
#include <cstdlib>
#include <cstring>
#include <python_scripting.h>
#include <sstream>
#include <fctsys.h>
#include <eda_base_frame.h>
#include <common.h>
#include <gal/color4d.h>
#include <macros.h>
#include <trace_helpers.h>
#include <pgm_base.h>
#include <settings/settings_manager.h>
/* init functions defined by swig */
#if PY_MAJOR_VERSION >= 3
extern "C" PyObject* PyInit__pcbnew( void );
#else
extern "C" void init_kicad( void );
extern "C" void init_pcbnew( void );
#endif
#define EXTRA_PYTHON_MODULES 10 // this is the number of python
// modules that we want to add into the list
/* python inittab that links module names to module init functions
* we will rebuild it to include the original python modules plus
* our own ones
*/
struct _inittab* SwigImportInittab;
static int SwigNumModules = 0;
/// True if the wxPython scripting layer was successfully loaded.
static bool wxPythonLoaded = false;
bool IsWxPythonLoaded()
{
return wxPythonLoaded;
}
/**
* Add a name + initfuction to our SwigImportInittab
*/
#if PY_MAJOR_VERSION >= 3
static void swigAddModule( const char* name, PyObject* (* initfunc)() )
#else
static void swigAddModule( const char* name, void (* initfunc)() )
#endif
{
SwigImportInittab[SwigNumModules].name = (char*) name;
SwigImportInittab[SwigNumModules].initfunc = initfunc;
SwigNumModules++;
SwigImportInittab[SwigNumModules].name = (char*) 0;
SwigImportInittab[SwigNumModules].initfunc = 0;
}
/**
* Add the builtin python modules
*/
static void swigAddBuiltin()
{
int i = 0;
/* discover the length of the pyimport inittab */
while( PyImport_Inittab[i].name )
i++;
/* allocate memory for the python module table */
SwigImportInittab = (struct _inittab*) malloc(
sizeof( struct _inittab ) * ( i + EXTRA_PYTHON_MODULES ) );
/* copy all pre-existing python modules into our newly created table */
i = 0;
while( PyImport_Inittab[i].name )
{
swigAddModule( PyImport_Inittab[i].name, PyImport_Inittab[i].initfunc );
i++;
}
}
/**
* Add the internal modules to the python scripting so they will be available to the scripts.
*/
static void swigAddModules()
{
#if PY_MAJOR_VERSION >= 3
swigAddModule( "_pcbnew", PyInit__pcbnew );
#else
swigAddModule( "_pcbnew", init_pcbnew );
#endif
// finally it seems better to include all in just one module
// but in case we needed to include any other modules,
// it must be done like this:
// swigAddModule( "_kicad", init_kicad );
}
/**
* Switch the python module table to the Pcbnew built one.
*/
static void swigSwitchPythonBuiltin()
{
PyImport_Inittab = SwigImportInittab;
}
PyThreadState* g_PythonMainTState;
/**
* Initialize the python environment and publish the Pcbnew interface inside it.
*
* This initializes all the wxPython interface and returns the python thread control structure
*/
bool pcbnewInitPythonScripting( const char * aUserScriptingPath )
{
int retv;
char cmd[1024];
swigAddBuiltin(); // add builtin functions
swigAddModules(); // add our own modules
swigSwitchPythonBuiltin(); // switch the python builtin modules to our new list
#ifdef _MSC_VER
// Under vcpkg/msvc, we need to explicitly set the python home
// or else it'll start consuming system python registry keys and the like instead
// We are going to follow the "unix" layout for the msvc/vcpkg distributions so exes in /root/bin
// And the python lib in /root/share/python3(/Lib,/DLLs)
wxFileName pyHome;
pyHome.Assign( Pgm().GetExecutablePath() );
pyHome.AppendDir( wxT("..") );
pyHome.AppendDir( wxT("share") );
pyHome.AppendDir( wxT("python3") );
pyHome.Normalize();
// MUST be called before Py_Initialize so it will to create valid default lib paths
Py_SetPythonHome( pyHome.GetFullPath().c_str() );
#endif
Py_Initialize();
PySys_SetArgv( Pgm().App().argc, Pgm().App().argv );
#ifdef KICAD_SCRIPTING_WXPYTHON
PyEval_InitThreads();
#ifndef KICAD_SCRIPTING_WXPYTHON_PHOENIX
#ifndef __WINDOWS__ // import wxversion.py currently not working under winbuilder, and not useful.
// Make sure that that the correct version of wxPython is loaded. In systems where there
// are different versions of wxPython installed this can lead to select wrong wxPython
// version being selected.
snprintf( cmd, sizeof( cmd ), "import wxversion; wxversion.select( '%s' )", WXPYTHON_VERSION );
retv = PyRun_SimpleString( cmd );
if( retv != 0 )
{
wxLogError( "Python error %d occurred running command:\n\n`%s`", retv, cmd );
return false;
}
#endif // ifndef __WINDOWS__
// Load the wxPython core API. Imports the wx._core_ module and sets a
// local pointer to a function table located there. The pointer is used
// internally by the rest of the API functions.
if( !wxPyCoreAPI_IMPORT() )
{
wxLogError( "***** Error importing the wxPython API! *****" );
PyErr_Print();
Py_Finalize();
return false;
}
#endif
#if defined( DEBUG )
RedirectStdio();
#endif
wxPythonLoaded = true;
// Save the current Python thread state and release the
// Global Interpreter Lock.
g_PythonMainTState = PyEval_SaveThread();
#endif // ifdef KICAD_SCRIPTING_WXPYTHON
// Load pcbnew inside Python and load all the user plugins and package-based plugins
{
PyLOCK lock;
// Load os so that we can modify the environment variables through python
snprintf( cmd, sizeof( cmd ), "import sys, os, traceback\n"
"sys.path.append(\".\")\n"
"import pcbnew\n"
"pcbnew.LoadPlugins(\"%s\")", aUserScriptingPath );
retv = PyRun_SimpleString( cmd );
if( retv != 0 )
wxLogError( "Python error %d occurred running command:\n\n`%s`", retv, cmd );
}
return true;
}
/**
* Run a python method from the pcbnew module.
*
* @param aMethodName is the name of the method (like "pcbnew.myfunction" )
* @param aNames will contain the returned string
*/
static void pcbnewRunPythonMethodWithReturnedString( const char* aMethodName, wxString& aNames )
{
aNames.Clear();
PyLOCK lock;
PyErr_Clear();
PyObject* builtins = PyImport_ImportModule( "pcbnew" );
wxASSERT( builtins );
if( !builtins ) // Something is wrong in pcbnew.py module (incorrect version?)
return;
PyObject* globals = PyDict_New();
PyDict_SetItemString( globals, "pcbnew", builtins );
Py_DECREF( builtins );
// Build the python code
char cmd[1024];
snprintf( cmd, sizeof(cmd), "result = %s()", aMethodName );
// Execute the python code and get the returned data
PyObject* localDict = PyDict_New();
PyObject* pobj = PyRun_String( cmd, Py_file_input, globals, localDict);
Py_DECREF( globals );
if( pobj )
{
PyObject* str = PyDict_GetItemString(localDict, "result" );
#if PY_MAJOR_VERSION >= 3
const char* str_res = NULL;
if(str)
{
PyObject* temp_bytes = PyUnicode_AsEncodedString( str, "UTF-8", "strict" );
if( temp_bytes != NULL )
{
str_res = PyBytes_AS_STRING( temp_bytes );
str_res = strdup( str_res );
Py_DECREF( temp_bytes );
}
else
{
wxLogMessage( "cannot encode unicode python string" );
}
}
#else
const char* str_res = str ? PyString_AsString( str ) : 0;
#endif
aNames = FROM_UTF8( str_res );
Py_DECREF( pobj );
}
Py_DECREF( localDict );
if( PyErr_Occurred() )
wxLogMessage( PyErrStringWithTraceback() );
}
void pcbnewGetUnloadableScriptNames( wxString& aNames )
{
pcbnewRunPythonMethodWithReturnedString( "pcbnew.GetUnLoadableWizards", aNames );
}
void pcbnewGetScriptsSearchPaths( wxString& aNames )
{
pcbnewRunPythonMethodWithReturnedString( "pcbnew.GetWizardsSearchPaths", aNames );
}
void pcbnewGetWizardsBackTrace( wxString& aNames )
{
pcbnewRunPythonMethodWithReturnedString( "pcbnew.GetWizardsBackTrace", aNames );
}
void pcbnewFinishPythonScripting()
{
#ifdef KICAD_SCRIPTING_WXPYTHON
PyEval_RestoreThread( g_PythonMainTState );
#endif
Py_Finalize();
}
wxString PyEscapeString( const wxString& aSource )
{
wxString converted;
for( wxUniChar c: aSource )
{
if( c == '\\' )
converted += "\\\\";
else if( c == '\'' )
converted += "\\\'";
else if( c == '\"' )
converted += "\\\"";
else
converted += c;
}
return converted;
}
void pcbnewUpdatePythonEnvVar( const wxString& aVar, const wxString& aValue )
{
char cmd[1024];
// Ensure the interpreter is initalized before we try to interact with it
if( !Py_IsInitialized() )
return;
wxLogTrace( traceEnvVars, "pcbnewUpdatePythonEnvVar: Updating Python variable %s = %s",
aVar, aValue );
wxString escapedVar = PyEscapeString( aVar );
wxString escapedVal = PyEscapeString( aValue );
snprintf( cmd, sizeof( cmd ),
"# coding=utf-8\n" // The values could potentially be UTF8
"os.environ[\"%s\"]=\"%s\"\n",
TO_UTF8( escapedVar ),
TO_UTF8( escapedVal ) );
PyLOCK lock;
int retv = PyRun_SimpleString( cmd );
if( retv != 0 )
wxLogError( "Python error %d occurred running command:\n\n`%s`", retv, cmd );
}
#if defined( KICAD_SCRIPTING_WXPYTHON )
void RedirectStdio()
{
// This is a helpful little tidbit to help debugging and such. It
// redirects Python's stdout and stderr to a window that will popup
// only on demand when something is printed, like a traceback.
const char* python_redirect =
"import sys\n"
"import wx\n"
"output = wx.PyOnDemandOutputWindow()\n"
"sys.stderr = output\n";
PyLOCK lock;
int retv = PyRun_SimpleString( python_redirect );
if( retv != 0 )
wxLogError( "Python error %d occurred running command:\n\n`%s`", retv, python_redirect );
}
wxWindow* CreatePythonShellWindow( wxWindow* parent, const wxString& aFramenameId )
{
// parent is actually *PCB_EDIT_FRAME
const int parentId = parent->GetId();
{
wxWindow* parent2 = wxWindow::FindWindowById( parentId );
wxASSERT( parent2 == parent );
}
// passing window ids instead of pointers is because wxPython is not
// exposing the needed c++ apis to make that possible.
std::stringstream pcbnew_pyshell_one_step;
pcbnew_pyshell_one_step << "import kicad_pyshell\n";
pcbnew_pyshell_one_step << "import wx\n";
pcbnew_pyshell_one_step << "\n";
pcbnew_pyshell_one_step << "parent = wx.FindWindowById( " << parentId << " )\n";
pcbnew_pyshell_one_step << "newshell = kicad_pyshell.makePcbnewShellWindow( parent )\n";
pcbnew_pyshell_one_step << "newshell.SetName( \"" << aFramenameId << "\" )\n";
// return value goes into a "global". It's not actually global, but rather
// the dict that is passed to PyRun_String
pcbnew_pyshell_one_step << "retval = newshell.GetId()\n";
// As always, first grab the GIL
PyLOCK lock;
// Now make a dictionary to serve as the global namespace when the code is
// executed. Put a reference to the builtins module in it.
PyObject* globals = PyDict_New();
#if PY_MAJOR_VERSION >= 3
PyObject* builtins = PyImport_ImportModule( "builtins" );
#else
PyObject* builtins = PyImport_ImportModule( "__builtin__" );
#endif
wxASSERT( builtins );
PyDict_SetItemString( globals, "__builtins__", builtins );
Py_DECREF( builtins );
#ifdef KICAD_SCRIPTING_WXPYTHON_PHOENIX
auto app_ptr = wxTheApp;
#endif
// Execute the code to make the makeWindow function we defined above
PyObject* result = PyRun_String( pcbnew_pyshell_one_step.str().c_str(), Py_file_input,
globals, globals );
#ifdef KICAD_SCRIPTING_WXPYTHON_PHOENIX
// This absolutely ugly hack is to work around the pyshell re-writing the global
// wxApp variable. Once we can initialize Phoenix to access the appropriate instance
// of wx, we can remove this line
wxApp::SetInstance( app_ptr );
#endif
// Was there an exception?
if( !result )
{
PyErr_Print();
return NULL;
}
Py_DECREF( result );
result = PyDict_GetItemString( globals, "retval" );
#if PY_MAJOR_VERSION >= 3
if( !PyLong_Check( result ) )
#else
if( !PyInt_Check( result ) )
#endif
{
wxLogError( "creation of scripting window didn't return a number" );
return NULL;
}
#if PY_MAJOR_VERSION >= 3
const long windowId = PyLong_AsLong( result );
#else
const long windowId = PyInt_AsLong( result );
#endif
// It's important not to decref globals before extracting the window id.
// If you do it early, globals, and the retval int it contains, may/will be garbage collected.
// We do not need to decref result, because GetItemString returns a borrowed reference.
Py_DECREF( globals );
wxWindow* window = wxWindow::FindWindowById( windowId );
if( !window )
{
wxLogError( "unable to find pyshell window with id %d", windowId );
return NULL;
}
return window;
}
#endif
wxString PyStringToWx( PyObject* aString )
{
wxString ret;
if( !aString )
return ret;
#if PY_MAJOR_VERSION >= 3
const char* str_res = NULL;
PyObject* temp_bytes = PyUnicode_AsEncodedString( aString, "UTF-8", "strict" );
if( temp_bytes != NULL )
{
str_res = PyBytes_AS_STRING( temp_bytes );
ret = FROM_UTF8( str_res );
Py_DECREF( temp_bytes );
}
else
{
wxLogMessage( "cannot encode unicode python string" );
}
#else
const char* str_res = PyString_AsString( aString );
ret = FROM_UTF8( str_res );
#endif
return ret;
}
wxArrayString PyArrayStringToWx( PyObject* aArrayString )
{
wxArrayString ret;
if( !aArrayString )
return ret;
int list_size = PyList_Size( aArrayString );
for( int n = 0; n < list_size; n++ )
{
PyObject* element = PyList_GetItem( aArrayString, n );
if( element )
{
#if PY_MAJOR_VERSION >= 3
const char* str_res = NULL;
PyObject* temp_bytes = PyUnicode_AsEncodedString( element, "UTF-8", "strict" );
if( temp_bytes != NULL )
{
str_res = PyBytes_AS_STRING( temp_bytes );
ret.Add( FROM_UTF8( str_res ), 1 );
Py_DECREF( temp_bytes );
}
else
{
wxLogMessage( "cannot encode unicode python string" );
}
#else
ret.Add( FROM_UTF8( PyString_AsString( element ) ), 1 );
#endif
}
}
return ret;
}
wxString PyErrStringWithTraceback()
{
wxString err;
if( !PyErr_Occurred() )
return err;
PyObject* type;
PyObject* value;
PyObject* traceback;
PyErr_Fetch( &type, &value, &traceback );
PyErr_NormalizeException( &type, &value, &traceback );
if( traceback == NULL )
{
traceback = Py_None;
Py_INCREF( traceback );
}
#if PY_MAJOR_VERSION >= 3
PyException_SetTraceback( value, traceback );
PyObject* tracebackModuleString = PyUnicode_FromString( "traceback" );
#else
PyObject* tracebackModuleString = PyString_FromString( "traceback" );
#endif
PyObject* tracebackModule = PyImport_Import( tracebackModuleString );
Py_DECREF( tracebackModuleString );
PyObject* formatException = PyObject_GetAttrString( tracebackModule,
"format_exception" );
Py_DECREF( tracebackModule );
PyObject* args = Py_BuildValue( "(O,O,O)", type, value, traceback );
PyObject* result = PyObject_CallObject( formatException, args );
Py_XDECREF( formatException );
Py_XDECREF( args );
Py_XDECREF( type );
Py_XDECREF( value );
Py_XDECREF( traceback );
wxArrayString res = PyArrayStringToWx( result );
for( unsigned i = 0; i<res.Count(); i++ )
{
err += res[i] + wxT( "\n" );
}
PyErr_Clear();
return err;
}
/**
* Find the Python scripting path.
*/
wxString PyScriptingPath( bool aUserPath )
{
wxString path;
//@todo This should this be a user configurable variable eg KISCRIPT?
if( aUserPath )
{
path = SETTINGS_MANAGER::GetUserSettingsPath() + wxT( "/scripting" );
}
else
{
if( wxGetEnv( wxT( "KICAD_RUN_FROM_BUILD_DIR" ), nullptr ) )
{
// Allow debugging from build dir by placing a "scripting" folder in the build root
path = Pgm().GetExecutablePath() + wxT( "../scripting" );
}
else
{
#if defined( __WXMAC__ )
path = GetOSXKicadDataDir() + wxT( "/scripting" );
#else
path = Pgm().GetExecutablePath() + wxT( "../share/kicad/scripting" );
#endif
}
}
wxFileName scriptPath( path );
scriptPath.MakeAbsolute();
// Convert '\' to '/' in path, because later python script read \n or \r
// as escaped sequence, and create issues, when calling it by PyRun_SimpleString() method.
// It can happen on Windows.
path = scriptPath.GetFullPath();
path.Replace( '\\', '/' );
return path;
}
wxString PyPluginsPath( bool aUserPath )
{
// Note we are using unix path separator, because window separator sometimes
// creates issues when passing a command string to a python method by PyRun_SimpleString
return PyScriptingPath( aUserPath ) + '/' + "plugins";
}