Mac/Modules/drag/dragsupport.py

   1 # This script generates a Python interface for an Apple Macintosh Manager.
   2 # It uses the "bgen" package to generate C code.
   3 # The function specifications are generated by scanning the mamager's header file,
   4 # using the "scantools" package (customized for this particular manager).
   5
   6 import string
   7
   8 # Declarations that change for each manager
   9 MACHEADERFILE = 'Drag.h'                # The Apple header file
  10 MODNAME = 'Drag'                                # The name of the module
  11 OBJECTNAME = 'DragObj'                  # The basic name of the objects used here
  12
  13 # The following is *usually* unchanged but may still require tuning
  14 MODPREFIX = MODNAME                     # The prefix for module-wide routines
  15 OBJECTTYPE = 'DragRef'  # The C type used to represent them
  16 OBJECTPREFIX = MODPREFIX + 'Obj'        # The prefix for object methods
  17 INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
  18 OUTPUTFILE = MODNAME + "module.c"       # The file generated by this program
  19
  20 from macsupport import *
  21
  22 # Create the type objects
  23
  24 DragRef = OpaqueByValueType(OBJECTTYPE, OBJECTPREFIX)
  25 DragItemRef = Type("ItemReference", "l")
  26 # Old names
  27 DragReference = DragRef
  28 ItemReference = DragItemRef
  29
  30 PixMapHandle = OpaqueByValueType("PixMapHandle", "ResObj")
  31 RgnHandle = OpaqueByValueType("RgnHandle", "ResObj")
  32 AEDesc = OpaqueType('AEDesc')
  33 AEDesc_ptr = AEDesc
  34 RGBColor = OpaqueType("RGBColor", "QdRGB")
  35
  36 FlavorType = OSTypeType("FlavorType")
  37 DragAttributes = Type("DragAttributes", "l")
  38 DragBehaviors = Type("DragBehaviors", "l")
  39 DragImageFlags = Type("DragImageFlags", "l")
  40 DragImageTranslucency = Type("DragImageTranslucency", "l")
  41 DragRegionMessage = Type("DragRegionMessage", "h")
  42 ZoomAcceleration = Type("ZoomAcceleration", "h")
  43 FlavorFlags = Type("FlavorFlags", "l")
  44 DragTrackingMessage = Type("DragTrackingMessage", "h")
  45
  46 includestuff = includestuff + """
  47 #ifdef WITHOUT_FRAMEWORKS
  48 #include <Drag.h>
  49 #else
  50 #include <Carbon/Carbon.h>
  51 #endif
  52
  53 /* Callback glue routines */
  54 DragTrackingHandlerUPP dragglue_TrackingHandlerUPP;
  55 DragReceiveHandlerUPP dragglue_ReceiveHandlerUPP;
  56 DragSendDataUPP dragglue_SendDataUPP;
  57 #if 0
  58 DragInputUPP dragglue_InputUPP;
  59 DragDrawingUPP dragglue_DrawingUPP;
  60 #endif
  61
  62 #ifdef USE_TOOLBOX_OBJECT_GLUE
  63 extern PyObject *_DragObj_New(DragRef);
  64 extern int _DragObj_Convert(PyObject *, DragRef *);
  65
  66 #define DragObj_New _DragObj_New
  67 #define DragObj_Convert _DragObj_Convert
  68 #endif
  69 """
  70
  71 finalstuff = finalstuff + """
  72 static pascal OSErr
  73 dragglue_TrackingHandler(DragTrackingMessage theMessage, WindowPtr theWindow,
  74                          void *handlerRefCon, DragReference theDrag)
  75 {
  76         PyObject *args, *rv;
  77         int i;
  78
  79         args = Py_BuildValue("hO&O&", theMessage, DragObj_New, theDrag, WinObj_WhichWindow, theWindow);
  80         if ( args == NULL )
  81                 return -1;
  82         rv = PyEval_CallObject((PyObject *)handlerRefCon, args);
  83         Py_DECREF(args);
  84         if ( rv == NULL ) {
  85                 fprintf(stderr, "Drag: Exception in TrackingHandler\\n");
  86                 return -1;
  87         }
  88         i = -1;
  89         if ( rv == Py_None )
  90                 i = 0;
  91         else
  92                 PyArg_Parse(rv, "l", &i);
  93         Py_DECREF(rv);
  94         return i;
  95 }
  96
  97 static pascal OSErr
  98 dragglue_ReceiveHandler(WindowPtr theWindow, void *handlerRefCon,
  99                         DragReference theDrag)
 100 {
 101         PyObject *args, *rv;
 102         int i;
 103
 104         args = Py_BuildValue("O&O&", DragObj_New, theDrag, WinObj_WhichWindow, theWindow);
 105         if ( args == NULL )
 106                 return -1;
 107         rv = PyEval_CallObject((PyObject *)handlerRefCon, args);
 108         Py_DECREF(args);
 109         if ( rv == NULL ) {
 110                 fprintf(stderr, "Drag: Exception in ReceiveHandler\\n");
 111                 return -1;
 112         }
 113         i = -1;
 114         if ( rv == Py_None )
 115                 i = 0;
 116         else
 117                 PyArg_Parse(rv, "l", &i);
 118         Py_DECREF(rv);
 119         return i;
 120 }
 121
 122 static pascal OSErr
 123 dragglue_SendData(FlavorType theType, void *dragSendRefCon,
 124                       ItemReference theItem, DragReference theDrag)
 125 {
 126         DragObjObject *self = (DragObjObject *)dragSendRefCon;
 127         PyObject *args, *rv;
 128         int i;
 129
 130         if ( self->sendproc == NULL )
 131                 return -1;
 132         args = Py_BuildValue("O&l", PyMac_BuildOSType, theType, theItem);
 133         if ( args == NULL )
 134                 return -1;
 135         rv = PyEval_CallObject(self->sendproc, args);
 136         Py_DECREF(args);
 137         if ( rv == NULL ) {
 138                 fprintf(stderr, "Drag: Exception in SendDataHandler\\n");
 139                 return -1;
 140         }
 141         i = -1;
 142         if ( rv == Py_None )
 143                 i = 0;
 144         else
 145                 PyArg_Parse(rv, "l", &i);
 146         Py_DECREF(rv);
 147         return i;
 148 }
 149
 150 #if 0
 151 static pascal OSErr
 152 dragglue_Input(Point *mouse, short *modifiers,
 153                    void *dragSendRefCon, DragReference theDrag)
 154 {
 155     return 0;
 156 }
 157
 158 static pascal OSErr
 159 dragglue_Drawing(xxxx
 160                    void *dragSendRefCon, DragReference theDrag)
 161 {
 162     return 0;
 163 }
 164 #endif
 165
 166 """
 167
 168 initstuff = initstuff + """
 169         PyMac_INIT_TOOLBOX_OBJECT_NEW(DragRef, DragObj_New);
 170         PyMac_INIT_TOOLBOX_OBJECT_CONVERT(DragRef, DragObj_Convert);
 171 """
 172
 173 variablestuff = """
 174 dragglue_TrackingHandlerUPP = NewDragTrackingHandlerUPP(dragglue_TrackingHandler);
 175 dragglue_ReceiveHandlerUPP = NewDragReceiveHandlerUPP(dragglue_ReceiveHandler);
 176 dragglue_SendDataUPP = NewDragSendDataUPP(dragglue_SendData);
 177 #if 0
 178 dragglue_InputUPP = NewDragInputUPP(dragglue_Input);
 179 dragglue_DrawingUPP = NewDragDrawingUPP(dragglue_Drawing);
 180 #endif
 181 """
 182
 183 class MyObjectDefinition(GlobalObjectDefinition):
 184         def outputCheckNewArg(self):
 185                 Output("""if (itself == NULL) {
 186                                         PyErr_SetString(Drag_Error,"Cannot create null Drag");
 187                                         return NULL;
 188                                 }""")
 189         def outputFreeIt(self, itselfname):
 190                 ## Output("DisposeDrag(%s);", itselfname)
 191                 Output("Py_XDECREF(self->sendproc);")
 192                 ## Output("Py_XDECREF(self->inputproc);")
 193                 ## Output("Py_XDECREF(self->drawingproc);")
 194
 195         def outputStructMembers(self):
 196                 GlobalObjectDefinition.outputStructMembers(self)
 197                 Output("PyObject *sendproc;")
 198                 ## Output("PyObject *inputproc;")
 199                 ## Output("PyObject *drawingproc;")
 200
 201         def outputInitStructMembers(self):
 202                 GlobalObjectDefinition.outputInitStructMembers(self)
 203                 Output("it->sendproc = NULL;")
 204                 ## Output("it->inputproc = NULL;")
 205                 ## Output("it->drawingproc = NULL;")
 206
 207
 208 # Create the generator groups and link them
 209 module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff, variablestuff)
 210 object = MyObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
 211 module.addobject(object)
 212
 213 # Create the generator classes used to populate the lists
 214 Function = OSErrFunctionGenerator
 215 Method = OSErrMethodGenerator
 216
 217 # Create and populate the lists
 218 functions = []
 219 methods = []
 220 execfile(INPUTFILE)
 221
 222 # add the populated lists to the generator groups
 223 for f in functions: module.add(f)
 224 for f in methods: object.add(f)
 225
 226 # Manual generators for the callbacks
 227
 228 installtracking_body = """
 229     PyObject *callback;
 230     WindowPtr theWindow = NULL;
 231     OSErr _err;
 232
 233     if ( !PyArg_ParseTuple(_args, "O|O&", &callback, WinObj_Convert, &theWindow) )
 234         return NULL;
 235     Py_INCREF(callback);        /* Cannot decref later, too bad */
 236     _err = InstallTrackingHandler(dragglue_TrackingHandlerUPP, theWindow, (void *)callback);
 237         if (_err != noErr) return PyMac_Error(_err);
 238         Py_INCREF(Py_None);
 239         return Py_None;
 240 """
 241 installtracking = ManualGenerator("InstallTrackingHandler", installtracking_body)
 242 module.add(installtracking)
 243
 244 installreceive_body = """
 245     PyObject *callback;
 246     WindowPtr theWindow = NULL;
 247     OSErr _err;
 248
 249     if ( !PyArg_ParseTuple(_args, "O|O&", &callback, WinObj_Convert, &theWindow) )
 250         return NULL;
 251     Py_INCREF(callback);        /* Cannot decref later, too bad */
 252     _err = InstallReceiveHandler(dragglue_ReceiveHandlerUPP, theWindow, (void *)callback);
 253         if (_err != noErr) return PyMac_Error(_err);
 254         Py_INCREF(Py_None);
 255         return Py_None;
 256 """
 257 installreceive = ManualGenerator("InstallReceiveHandler", installreceive_body)
 258 module.add(installreceive)
 259
 260 removetracking_body = """
 261     WindowPtr theWindow = NULL;
 262     OSErr _err;
 263
 264     if ( !PyArg_ParseTuple(_args, "|O&", WinObj_Convert, &theWindow) )
 265         return NULL;
 266     _err = RemoveTrackingHandler(dragglue_TrackingHandlerUPP, theWindow);
 267         if (_err != noErr) return PyMac_Error(_err);
 268         Py_INCREF(Py_None);
 269         return Py_None;
 270 """
 271 removetracking = ManualGenerator("RemoveTrackingHandler", removetracking_body)
 272 module.add(removetracking)
 273
 274 removereceive_body = """
 275     WindowPtr theWindow = NULL;
 276     OSErr _err;
 277
 278     if ( !PyArg_ParseTuple(_args, "|O&", WinObj_Convert, &theWindow) )
 279         return NULL;
 280     _err = RemoveReceiveHandler(dragglue_ReceiveHandlerUPP, theWindow);
 281         if (_err != noErr) return PyMac_Error(_err);
 282         Py_INCREF(Py_None);
 283         return Py_None;
 284 """
 285 removereceive = ManualGenerator("RemoveReceiveHandler", removereceive_body)
 286 module.add(removereceive)
 287
 288 # generate output (open the output file as late as possible)
 289 SetOutputFileName(OUTPUTFILE)
 290 module.generate()