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 = 'DragReference'    # 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 DragReference = OpaqueByValueType(OBJECTTYPE, OBJECTPREFIX)
  25
  26 ##CCTabHandle = OpaqueByValueType("CCTabHandle", "ResObj")
  27 ##AuxCtlHandle = OpaqueByValueType("AuxCtlHandle", "ResObj")
  28 ##ControlPartCode = Type("ControlPartCode", "h")
  29 ##DragConstraint = Type("DragConstraint", "h")
  30 ##ControlVariant = Type("ControlVariant", "h")
  31 ##IconTransformType = Type("IconTransformType", "h")
  32 ##ControlButtonGraphicAlignment = Type("ControlButtonGraphicAlignment", "h")
  33 ##ControlButtonTextAlignment = Type("ControlButtonTextAlignment", "h")
  34 ##ControlButtonTextPlacement = Type("ControlButtonTextPlacement", "h")
  35 ##ControlContentType = Type("ControlContentType", "h")
  36 ##ControlFocusPart = Type("ControlFocusPart", "h")
  37 ##
  38 ##ControlFontStyleRec = OpaqueType('ControlFontStyleRec', 'ControlFontStyle')
  39 ##ControlFontStyleRec_ptr = ControlFontStyleRec
  40 PixMapHandle = OpaqueByValueType("PixMapHandle", "ResObj")
  41 RgnHandle = OpaqueByValueType("RgnHandle", "ResObj")
  42 AEDesc = OpaqueType('AEDesc')
  43 AEDesc_ptr = AEDesc
  44 RGBColor = OpaqueType("RGBColor", "QdRGB")
  45
  46 ItemReference = Type("ItemReference", "l")
  47 FlavorType = OSTypeType("FlavorType")
  48 DragAttributes = Type("DragAttributes", "l")
  49 DragImageFlags = Type("DragImageFlags", "l")
  50 DragImageTranslucency = Type("DragImageTranslucency", "l")
  51 DragRegionMessage = Type("DragRegionMessage", "h")
  52 ZoomAcceleration = Type("ZoomAcceleration", "h")
  53 FlavorFlags = Type("FlavorFlags", "l")
  54 DragTrackingMessage = Type("DragTrackingMessage", "h")
  55
  56 includestuff = includestuff + """
  57 #include <%s>""" % MACHEADERFILE + """
  58
  59 /* Callback glue routines */
  60 DragTrackingHandlerUPP dragglue_TrackingHandlerUPP;
  61 DragReceiveHandlerUPP dragglue_ReceiveHandlerUPP;
  62 DragSendDataUPP dragglue_SendDataUPP;
  63 #if 0
  64 DragInputUPP dragglue_InputUPP;
  65 DragDrawingUPP dragglue_DrawingUPP;
  66 #endif
  67 """
  68
  69 finalstuff = finalstuff + """
  70 static pascal OSErr
  71 dragglue_TrackingHandler(DragTrackingMessage theMessage, WindowPtr theWindow,
  72                          void *handlerRefCon, DragReference theDrag)
  73 {
  74         PyObject *args, *rv;
  75         int i;
  76
  77         args = Py_BuildValue("hO&O&", theMessage, DragObj_New, theDrag, WinObj_WhichWindow, theWindow);
  78         if ( args == NULL )
  79                 return -1;
  80         rv = PyEval_CallObject((PyObject *)handlerRefCon, args);
  81         Py_DECREF(args);
  82         if ( rv == NULL ) {
  83                 fprintf(stderr, "Drag: Exception in TrackingHandler\\n");
  84                 return -1;
  85         }
  86         i = -1;
  87         if ( rv == Py_None )
  88                 i = 0;
  89         else
  90                 PyArg_Parse(rv, "l", &i);
  91         Py_DECREF(rv);
  92         return i;
  93 }
  94
  95 static pascal OSErr
  96 dragglue_ReceiveHandler(WindowPtr theWindow, void *handlerRefCon,
  97                         DragReference theDrag)
  98 {
  99         PyObject *args, *rv;
 100         int i;
 101
 102         args = Py_BuildValue("O&O&", DragObj_New, theDrag, WinObj_WhichWindow, theWindow);
 103         if ( args == NULL )
 104                 return -1;
 105         rv = PyEval_CallObject((PyObject *)handlerRefCon, args);
 106         Py_DECREF(args);
 107         if ( rv == NULL ) {
 108                 fprintf(stderr, "Drag: Exception in ReceiveHandler\\n");
 109                 return -1;
 110         }
 111         i = -1;
 112         if ( rv == Py_None )
 113                 i = 0;
 114         else
 115                 PyArg_Parse(rv, "l", &i);
 116         Py_DECREF(rv);
 117         return i;
 118 }
 119
 120 static pascal OSErr
 121 dragglue_SendData(FlavorType theType, void *dragSendRefCon,
 122                       ItemReference theItem, DragReference theDrag)
 123 {
 124         DragObjObject *self = (DragObjObject *)dragSendRefCon;
 125         PyObject *args, *rv;
 126         int i;
 127
 128         if ( self->sendproc == NULL )
 129                 return -1;
 130         args = Py_BuildValue("O&l", PyMac_BuildOSType, theType, theItem);
 131         if ( args == NULL )
 132                 return -1;
 133         rv = PyEval_CallObject(self->sendproc, args);
 134         Py_DECREF(args);
 135         if ( rv == NULL ) {
 136                 fprintf(stderr, "Drag: Exception in SendDataHandler\\n");
 137                 return -1;
 138         }
 139         i = -1;
 140         if ( rv == Py_None )
 141                 i = 0;
 142         else
 143                 PyArg_Parse(rv, "l", &i);
 144         Py_DECREF(rv);
 145         return i;
 146 }
 147
 148 #if 0
 149 static pascal OSErr
 150 dragglue_Input(Point *mouse, short *modifiers,
 151                    void *dragSendRefCon, DragReference theDrag)
 152 {
 153     return 0;
 154 }
 155
 156 static pascal OSErr
 157 dragglue_Drawing(xxxx
 158                    void *dragSendRefCon, DragReference theDrag)
 159 {
 160     return 0;
 161 }
 162 #endif
 163
 164 """
 165
 166 variablestuff = """
 167 dragglue_TrackingHandlerUPP = NewDragTrackingHandlerProc(dragglue_TrackingHandler);
 168 dragglue_ReceiveHandlerUPP = NewDragReceiveHandlerProc(dragglue_ReceiveHandler);
 169 dragglue_SendDataUPP = NewDragSendDataProc(dragglue_SendData);
 170 #if 0
 171 dragglue_InputUPP = NewDragInputProc(dragglue_Input);
 172 dragglue_DrawingUPP = NewDragDrawingProc(dragglue_Drawing);
 173 #endif
 174 """
 175
 176 class MyObjectDefinition(GlobalObjectDefinition):
 177         def outputCheckNewArg(self):
 178                 Output("""if (itself == NULL) {
 179                                         PyErr_SetString(Drag_Error,"Cannot create null Drag");
 180                                         return NULL;
 181                                 }""")
 182         def outputFreeIt(self, itselfname):
 183                 ## Output("DisposeDrag(%s);", itselfname)
 184                 Output("Py_XDECREF(self->sendproc);")
 185                 ## Output("Py_XDECREF(self->inputproc);")
 186                 ## Output("Py_XDECREF(self->drawingproc);")
 187
 188         def outputStructMembers(self):
 189                 GlobalObjectDefinition.outputStructMembers(self)
 190                 Output("PyObject *sendproc;")
 191                 ## Output("PyObject *inputproc;")
 192                 ## Output("PyObject *drawingproc;")
 193
 194         def outputInitStructMembers(self):
 195                 GlobalObjectDefinition.outputInitStructMembers(self)
 196                 Output("it->sendproc = NULL;")
 197                 ## Output("it->inputproc = NULL;")
 198                 ## Output("it->drawingproc = NULL;")
 199
 200
 201 # Create the generator groups and link them
 202 module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff, variablestuff)
 203 object = MyObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
 204 module.addobject(object)
 205
 206 # Create the generator classes used to populate the lists
 207 Function = OSErrFunctionGenerator
 208 Method = OSErrMethodGenerator
 209
 210 # Create and populate the lists
 211 functions = []
 212 methods = []
 213 execfile(INPUTFILE)
 214
 215 # add the populated lists to the generator groups
 216 for f in functions: module.add(f)
 217 for f in methods: object.add(f)
 218
 219 # Manual generators for the callbacks
 220
 221 installtracking_body = """
 222     PyObject *callback;
 223     WindowPtr theWindow = NULL;
 224     OSErr _err;
 225
 226     if ( !PyArg_ParseTuple(_args, "O|O&", &callback, WinObj_Convert, &theWindow) )
 227         return NULL;
 228     Py_INCREF(callback);        /* Cannot decref later, too bad */
 229     _err = InstallTrackingHandler(dragglue_TrackingHandlerUPP, theWindow, (void *)callback);
 230         if (_err != noErr) return PyMac_Error(_err);
 231         Py_INCREF(Py_None);
 232         return Py_None;
 233 """
 234 installtracking = ManualGenerator("InstallTrackingHandler", installtracking_body)
 235 module.add(installtracking)
 236
 237 installreceive_body = """
 238     PyObject *callback;
 239     WindowPtr theWindow = NULL;
 240     OSErr _err;
 241
 242     if ( !PyArg_ParseTuple(_args, "O|O&", &callback, WinObj_Convert, &theWindow) )
 243         return NULL;
 244     Py_INCREF(callback);        /* Cannot decref later, too bad */
 245     _err = InstallReceiveHandler(dragglue_ReceiveHandlerUPP, theWindow, (void *)callback);
 246         if (_err != noErr) return PyMac_Error(_err);
 247         Py_INCREF(Py_None);
 248         return Py_None;
 249 """
 250 installreceive = ManualGenerator("InstallReceiveHandler", installreceive_body)
 251 module.add(installreceive)
 252
 253 removetracking_body = """
 254     WindowPtr theWindow = NULL;
 255     OSErr _err;
 256
 257     if ( !PyArg_ParseTuple(_args, "|O&", WinObj_Convert, &theWindow) )
 258         return NULL;
 259     _err = RemoveTrackingHandler(dragglue_TrackingHandlerUPP, theWindow);
 260         if (_err != noErr) return PyMac_Error(_err);
 261         Py_INCREF(Py_None);
 262         return Py_None;
 263 """
 264 removetracking = ManualGenerator("RemoveTrackingHandler", removetracking_body)
 265 module.add(removetracking)
 266
 267 removereceive_body = """
 268     WindowPtr theWindow = NULL;
 269     OSErr _err;
 270
 271     if ( !PyArg_ParseTuple(_args, "|O&", WinObj_Convert, &theWindow) )
 272         return NULL;
 273     _err = RemoveReceiveHandler(dragglue_ReceiveHandlerUPP, theWindow);
 274         if (_err != noErr) return PyMac_Error(_err);
 275         Py_INCREF(Py_None);
 276         return Py_None;
 277 """
 278 removereceive = ManualGenerator("RemoveReceiveHandler", removereceive_body)
 279 module.add(removereceive)
 280
 281 # generate output (open the output file as late as possible)
 282 SetOutputFileName(OUTPUTFILE)
 283 module.generate()