Mac/Modules/win/winsupport.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 = 'Windows.h'             # The Apple header file
  10 MODNAME = 'Win'                         # The name of the module
  11 OBJECTNAME = 'Window'                   # 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 = OBJECTNAME + 'Ptr'         # 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 EDITFILE = string.lower(MODPREFIX) + 'edit.py' # The manual definitions
  19 OUTPUTFILE = MODNAME + "module.c"       # The file generated by this program
  20
  21 from macsupport import *
  22
  23 # Create the type objects
  24
  25 WindowPtr = OpaqueByValueType(OBJECTTYPE, OBJECTPREFIX)
  26 WindowRef = WindowPtr
  27 WindowPeek = OpaqueByValueType("WindowPeek", OBJECTPREFIX)
  28 WindowPeek.passInput = lambda name: "(WindowPeek)(%s)" % name
  29 CGrafPtr = OpaqueByValueType("CGrafPtr", "GrafObj")
  30 GrafPtr = OpaqueByValueType("GrafPtr", "GrafObj")
  31
  32 RgnHandle = OpaqueByValueType("RgnHandle", "ResObj")
  33 PicHandle = OpaqueByValueType("PicHandle", "ResObj")
  34 WCTabHandle = OpaqueByValueType("WCTabHandle", "ResObj")
  35 AuxWinHandle = OpaqueByValueType("AuxWinHandle", "ResObj")
  36 PixPatHandle = OpaqueByValueType("PixPatHandle", "ResObj")
  37
  38 WindowRegionCode = Type("WindowRegionCode", "h")
  39
  40 includestuff = includestuff + """
  41 #include <%s>""" % MACHEADERFILE + """
  42
  43 #define resNotFound -192 /* Can't include <Errors.h> because of Python's "errors.h" */
  44
  45 """
  46
  47 finalstuff = finalstuff + """
  48 /* Return the object corresponding to the window, or NULL */
  49
  50 PyObject *
  51 WinObj_WhichWindow(w)
  52         WindowPtr w;
  53 {
  54         PyObject *it;
  55
  56         /* XXX What if we find a stdwin window or a window belonging
  57                to some other package? */
  58         if (w == NULL)
  59                 it = NULL;
  60         else
  61                 it = (PyObject *) GetWRefCon(w);
  62         if (it == NULL || ((WindowObject *)it)->ob_itself != w)
  63                 it = Py_None;
  64         Py_INCREF(it);
  65         return it;
  66 }
  67 """
  68
  69 class MyObjectDefinition(GlobalObjectDefinition):
  70         def outputCheckNewArg(self):
  71                 Output("if (itself == NULL) return PyMac_Error(resNotFound);")
  72         def outputInitStructMembers(self):
  73                 GlobalObjectDefinition.outputInitStructMembers(self)
  74                 Output("SetWRefCon(itself, (long)it);")
  75         def outputCheckConvertArg(self):
  76                 OutLbrace("if (DlgObj_Check(v))")
  77                 Output("*p_itself = ((WindowObject *)v)->ob_itself;")
  78                 Output("return 1;")
  79                 OutRbrace()
  80                 Out("""
  81                 if (v == Py_None) { *p_itself = NULL; return 1; }
  82                 if (PyInt_Check(v)) { *p_itself = (WindowPtr)PyInt_AsLong(v); return 1; }
  83                 """)
  84         def outputFreeIt(self, itselfname):
  85                 Output("DisposeWindow(%s);", itselfname)
  86 # From here on it's basically all boiler plate...
  87
  88 # Create the generator groups and link them
  89 module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
  90 object = MyObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
  91 module.addobject(object)
  92
  93 # Create the generator classes used to populate the lists
  94 Function = OSErrFunctionGenerator
  95 Method = OSErrMethodGenerator
  96
  97 # Create and populate the lists
  98 functions = []
  99 methods = []
 100 execfile(INPUTFILE)
 101
 102 # Add manual routines for converting integer WindowPtr's (as returned by
 103 # various event routines)  and Dialog objects to a WindowObject.
 104 whichwin_body = """
 105 long ptr;
 106
 107 if ( !PyArg_ParseTuple(_args, "i", &ptr) )
 108         return NULL;
 109 return WinObj_WhichWindow((WindowPtr)ptr);
 110 """
 111
 112 f = ManualGenerator("WhichWindow", whichwin_body)
 113 f.docstring = lambda : "Resolve an integer WindowPtr address to a Window object"
 114
 115 functions.append(f)
 116
 117 # And add the routines that access the internal bits of a window struct. They
 118 # are currently #defined in Windows.h, they will be real routines in Copland
 119 # (at which time this execfile can go)
 120 execfile(EDITFILE)
 121
 122 # add the populated lists to the generator groups
 123 # (in a different wordl the scan program would generate this)
 124 for f in functions: module.add(f)
 125 for f in methods: object.add(f)
 126
 127
 128
 129 # generate output (open the output file as late as possible)
 130 SetOutputFileName(OUTPUTFILE)
 131 module.generate()