Mac/Modules/evt/evtsupport.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 = 'Events.h'              # The Apple header file
  10 MODNAME = '_Evt'                                # The name of the module
  11 OBJECTNAME = 'Event'                    # The basic name of the objects used here
  12 KIND = 'Record'                         # Usually 'Ptr' or 'Handle'
  13
  14 # The following is *usually* unchanged but may still require tuning
  15 MODPREFIX = 'Evt'                       # The prefix for module-wide routines
  16 OBJECTTYPE = OBJECTNAME + KIND          # The C type used to represent them
  17 OBJECTPREFIX = MODPREFIX + 'Obj'        # The prefix for object methods
  18 INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
  19 OUTPUTFILE = MODNAME + "module.c"       # The file generated by this program
  20
  21 from macsupport import *
  22
  23 # Create the type objects
  24
  25 #WindowPeek = OpaqueByValueType("WindowPeek", OBJECTPREFIX)
  26
  27 RgnHandle = FakeType("(RgnHandle)0")
  28 # XXXX Should be next, but this will break a lot of code...
  29 # RgnHandle = OpaqueByValueType("RgnHandle", "OptResObj")
  30
  31 KeyMap = ArrayOutputBufferType("KeyMap")
  32 ##MacOSEventKind = Type("MacOSEventKind", "h") # Old-style
  33 ##MacOSEventMask = Type("MacOSEventMask", "h") # Old-style
  34 EventMask = Type("EventMask", "H")
  35 EventKind = Type("EventKind", "H")
  36
  37 includestuff = includestuff + """
  38 #ifdef WITHOUT_FRAMEWORKS
  39 #include <Events.h>
  40 #else
  41 #include <Carbon/Carbon.h>
  42 #endif
  43
  44 """
  45
  46 class MyObjectDefinition(GlobalObjectDefinition):
  47         def outputCheckNewArg(self):
  48                 Output("if (itself == NULL) return PyMac_Error(resNotFound);")
  49         def outputCheckConvertArg(self):
  50                 OutLbrace("if (DlgObj_Check(v))")
  51                 Output("*p_itself = ((WindowObject *)v)->ob_itself;")
  52                 Output("return 1;")
  53                 OutRbrace()
  54                 Out("""
  55                 if (v == Py_None) { *p_itself = NULL; return 1; }
  56                 if (PyInt_Check(v)) { *p_itself = (WindowPtr)PyInt_AsLong(v); return 1; }
  57                 """)
  58
  59 # From here on it's basically all boiler plate...
  60
  61 # Create the generator groups and link them
  62 module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
  63 ##object = MyObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
  64 ##module.addobject(object)
  65
  66 # Create the generator classes used to populate the lists
  67 Function = OSErrWeakLinkFunctionGenerator
  68 ##Method = OSErrWeakLinkMethodGenerator
  69
  70 # Create and populate the lists
  71 functions = []
  72 ##methods = []
  73 execfile(INPUTFILE)
  74
  75 # Move TickCount here, for convenience
  76 f = Function(UInt32, 'TickCount',
  77 )
  78 functions.append(f)
  79
  80 # add the populated lists to the generator groups
  81 # (in a different wordl the scan program would generate this)
  82 for f in functions: module.add(f)
  83 ##for f in methods: object.add(f)
  84
  85 WaitNextEvent_body = """
  86 Boolean _rv;
  87 EventMask eventMask;
  88 EventRecord theEvent;
  89 UInt32 sleep;
  90 Handle mouseregion = (Handle)0;
  91
  92 if (!PyArg_ParseTuple(_args, "Hl|O&",
  93                       &eventMask,
  94                       &sleep,
  95                       OptResObj_Convert, &mouseregion))
  96         return NULL;
  97 _rv = WaitNextEvent(eventMask,
  98                     &theEvent,
  99                     sleep,
 100                     (RgnHandle)mouseregion);
 101 _res = Py_BuildValue("bO&",
 102                      _rv,
 103                      PyMac_BuildEventRecord, &theEvent);
 104 return _res;
 105 """
 106 f = ManualGenerator("WaitNextEvent", WaitNextEvent_body);
 107 f.docstring = lambda: "(EventMask eventMask, UInt32 sleep [,RegionHandle]) -> (Boolean _rv, EventRecord theEvent)"
 108 module.add(f)
 109
 110
 111 # generate output (open the output file as late as possible)
 112 SetOutputFileName(OUTPUTFILE)
 113 module.generate()
 114