# This script generates a Python interface for an Apple Macintosh Manager.
# It uses the "bgen" package to generate C code.
# The function specifications are generated by scanning the mamager's header file,
# using the "scantools" package (customized for this particular manager).
import string
# Declarations that change for each manager
MACHEADERFILE = 'Drag.h' # The Apple header file
MODNAME = '_Drag' # The name of the module
OBJECTNAME = 'DragObj' # The basic name of the objects used here
# The following is *usually* unchanged but may still require tuning
MODPREFIX = 'Drag' # The prefix for module-wide routines
OBJECTTYPE = 'DragRef' # The C type used to represent them
OBJECTPREFIX = MODPREFIX + 'Obj' # The prefix for object methods
INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
OUTPUTFILE = MODNAME + "module.c" # The file generated by this program
from macsupport import *
# Create the type objects
DragRef = OpaqueByValueType(OBJECTTYPE, OBJECTPREFIX)
DragItemRef = Type("ItemReference", "l")
# Old names
DragReference = DragRef
ItemReference = DragItemRef
PixMapHandle = OpaqueByValueType("PixMapHandle", "ResObj")
RgnHandle = OpaqueByValueType("RgnHandle", "ResObj")
AEDesc = OpaqueType('AEDesc')
AEDesc_ptr = AEDesc
RGBColor = OpaqueType("RGBColor", "QdRGB")
FlavorType = OSTypeType("FlavorType")
DragAttributes = Type("DragAttributes", "l")
DragBehaviors = Type("DragBehaviors", "l")
DragImageFlags = Type("DragImageFlags", "l")
DragImageTranslucency = Type("DragImageTranslucency", "l")
DragRegionMessage = Type("DragRegionMessage", "h")
ZoomAcceleration = Type("ZoomAcceleration", "h")
FlavorFlags = Type("FlavorFlags", "l")
DragTrackingMessage = Type("DragTrackingMessage", "h")
includestuff = includestuff + """
#include <Carbon/Carbon.h>
/* Callback glue routines */
DragTrackingHandlerUPP dragglue_TrackingHandlerUPP;
DragReceiveHandlerUPP dragglue_ReceiveHandlerUPP;
DragSendDataUPP dragglue_SendDataUPP;
#if 0
DragInputUPP dragglue_InputUPP;
DragDrawingUPP dragglue_DrawingUPP;
#endif
#ifdef USE_TOOLBOX_OBJECT_GLUE
extern PyObject *_DragObj_New(DragRef);
extern int _DragObj_Convert(PyObject *, DragRef *);
#define DragObj_New _DragObj_New
#define DragObj_Convert _DragObj_Convert
#endif
"""
finalstuff = finalstuff + """
static pascal OSErr
dragglue_TrackingHandler(DragTrackingMessage theMessage, WindowPtr theWindow,
void *handlerRefCon, DragReference theDrag)
{
PyObject *args, *rv;
int i;
args = Py_BuildValue("hO&O&", theMessage, DragObj_New, theDrag, WinObj_WhichWindow, theWindow);
if ( args == NULL )
return -1;
rv = PyEval_CallObject((PyObject *)handlerRefCon, args);
Py_DECREF(args);
if ( rv == NULL ) {
PySys_WriteStderr("Drag: Exception in TrackingHandler\\n");
PyErr_Print();
return -1;
}
i = -1;
if ( rv == Py_None )
i = 0;
else
PyArg_Parse(rv, "l", &i);
Py_DECREF(rv);
return i;
}
static pascal OSErr
dragglue_ReceiveHandler(WindowPtr theWindow, void *handlerRefCon,
DragReference theDrag)
{
PyObject *args, *rv;
int i;
args = Py_BuildValue("O&O&", DragObj_New, theDrag, WinObj_WhichWindow, theWindow);
if ( args == NULL )
return -1;
rv = PyEval_CallObject((PyObject *)handlerRefCon, args);
Py_DECREF(args);
if ( rv == NULL ) {
PySys_WriteStderr("Drag: Exception in ReceiveHandler\\n");
PyErr_Print();
return -1;
}
i = -1;
if ( rv == Py_None )
i = 0;
else
PyArg_Parse(rv, "l", &i);
Py_DECREF(rv);
return i;
}
static pascal OSErr
dragglue_SendData(FlavorType theType, void *dragSendRefCon,
ItemReference theItem, DragReference theDrag)
{
DragObjObject *self = (DragObjObject *)dragSendRefCon;
PyObject *args, *rv;
int i;
if ( self->sendproc == NULL )
return -1;
args = Py_BuildValue("O&l", PyMac_BuildOSType, theType, theItem);
if ( args == NULL )
return -1;
rv = PyEval_CallObject(self->sendproc, args);
Py_DECREF(args);
if ( rv == NULL ) {
PySys_WriteStderr("Drag: Exception in SendDataHandler\\n");
PyErr_Print();
return -1;
}
i = -1;
if ( rv == Py_None )
i = 0;
else
PyArg_Parse(rv, "l", &i);
Py_DECREF(rv);
return i;
}
#if 0
static pascal OSErr
dragglue_Input(Point *mouse, short *modifiers,
void *dragSendRefCon, DragReference theDrag)
{
return 0;
}
static pascal OSErr
dragglue_Drawing(xxxx
void *dragSendRefCon, DragReference theDrag)
{
return 0;
}
#endif
"""
initstuff = initstuff + """
PyMac_INIT_TOOLBOX_OBJECT_NEW(DragRef, DragObj_New);
PyMac_INIT_TOOLBOX_OBJECT_CONVERT(DragRef, DragObj_Convert);
"""
variablestuff = """
dragglue_TrackingHandlerUPP = NewDragTrackingHandlerUPP(dragglue_TrackingHandler);
dragglue_ReceiveHandlerUPP = NewDragReceiveHandlerUPP(dragglue_ReceiveHandler);
dragglue_SendDataUPP = NewDragSendDataUPP(dragglue_SendData);
#if 0
dragglue_InputUPP = NewDragInputUPP(dragglue_Input);
dragglue_DrawingUPP = NewDragDrawingUPP(dragglue_Drawing);
#endif
"""
class MyObjectDefinition(PEP253Mixin, GlobalObjectDefinition):
def outputCheckNewArg(self):
Output("""if (itself == NULL) {
PyErr_SetString(Drag_Error,"Cannot create null Drag");
return NULL;
}""")
def outputFreeIt(self, itselfname):
## Output("DisposeDrag(%s);", itselfname)
Output("Py_XDECREF(self->sendproc);")
## Output("Py_XDECREF(self->inputproc);")
## Output("Py_XDECREF(self->drawingproc);")
def outputStructMembers(self):
GlobalObjectDefinition.outputStructMembers(self)
Output("PyObject *sendproc;")
## Output("PyObject *inputproc;")
## Output("PyObject *drawingproc;")
def outputInitStructMembers(self):
GlobalObjectDefinition.outputInitStructMembers(self)
Output("it->sendproc = NULL;")
## Output("it->inputproc = NULL;")
## Output("it->drawingproc = NULL;")
# Create the generator groups and link them
module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff, variablestuff)
object = MyObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
module.addobject(object)
# Create the generator classes used to populate the lists
Function = OSErrWeakLinkFunctionGenerator
Method = OSErrWeakLinkMethodGenerator
# Create and populate the lists
functions = []
methods = []
execfile(INPUTFILE)
# add the populated lists to the generator groups
for f in functions: module.add(f)
for f in methods: object.add(f)
# Manual generators for the callbacks
installtracking_body = """
PyObject *callback;
WindowPtr theWindow = NULL;
OSErr _err;
if ( !PyArg_ParseTuple(_args, "O|O&", &callback, WinObj_Convert, &theWindow) )
return NULL;
Py_INCREF(callback); /* Cannot decref later, too bad */
_err = InstallTrackingHandler(dragglue_TrackingHandlerUPP, theWindow, (void *)callback);
if (_err != noErr) return PyMac_Error(_err);
Py_INCREF(Py_None);
_res = Py_None;
return _res;
"""
installtracking = ManualGenerator("InstallTrackingHandler", installtracking_body)
module.add(installtracking)
installreceive_body = """
PyObject *callback;
WindowPtr theWindow = NULL;
OSErr _err;
if ( !PyArg_ParseTuple(_args, "O|O&", &callback, WinObj_Convert, &theWindow) )
return NULL;
Py_INCREF(callback); /* Cannot decref later, too bad */
_err = InstallReceiveHandler(dragglue_ReceiveHandlerUPP, theWindow, (void *)callback);
if (_err != noErr) return PyMac_Error(_err);
Py_INCREF(Py_None);
_res = Py_None;
return _res;
"""
installreceive = ManualGenerator("InstallReceiveHandler", installreceive_body)
module.add(installreceive)
removetracking_body = """
WindowPtr theWindow = NULL;
OSErr _err;
if ( !PyArg_ParseTuple(_args, "|O&", WinObj_Convert, &theWindow) )
return NULL;
_err = RemoveTrackingHandler(dragglue_TrackingHandlerUPP, theWindow);
if (_err != noErr) return PyMac_Error(_err);
Py_INCREF(Py_None);
_res = Py_None;
return _res;
"""
removetracking = ManualGenerator("RemoveTrackingHandler", removetracking_body)
module.add(removetracking)
removereceive_body = """
WindowPtr theWindow = NULL;
OSErr _err;
if ( !PyArg_ParseTuple(_args, "|O&", WinObj_Convert, &theWindow) )
return NULL;
_err = RemoveReceiveHandler(dragglue_ReceiveHandlerUPP, theWindow);
if (_err != noErr) return PyMac_Error(_err);
Py_INCREF(Py_None);
_res = Py_None;
return _res;
"""
removereceive = ManualGenerator("RemoveReceiveHandler", removereceive_body)
module.add(removereceive)
# generate output (open the output file as late as possible)
SetOutputFileName(OUTPUTFILE)
module.generate()