# 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()