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 import addpack
   9 addpack.addpack(':Tools:bgen:bgen')
  10
  11 # Declarations that change for each manager
  12 MACHEADERFILE = 'Windows.h'             # The Apple header file
  13 MODNAME = 'Win'                         # The name of the module
  14 OBJECTNAME = 'Window'                   # The basic name of the objects used here
  15
  16 # The following is *usually* unchanged but may still require tuning
  17 MODPREFIX = MODNAME                     # The prefix for module-wide routines
  18 OBJECTTYPE = OBJECTNAME + 'Ptr'         # The C type used to represent them
  19 OBJECTPREFIX = MODPREFIX + 'Obj'        # The prefix for object methods
  20 INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
  21 OUTPUTFILE = MODNAME + "module.c"       # The file generated by this program
  22
  23 from macsupport import *
  24
  25 # Create the type objects
  26
  27 WindowPtr = OpaqueByValueType(OBJECTTYPE, OBJECTPREFIX)
  28 WindowRef = WindowPtr
  29 WindowPeek = OpaqueByValueType("WindowPeek", OBJECTPREFIX)
  30 WindowPeek.passInput = lambda name: "(WindowPeek)(%s)" % name
  31
  32 #RgnHandle = FakeType("theWindow->updtRgn") # XXX
  33
  34 includestuff = includestuff + """
  35 #include <%s>""" % MACHEADERFILE + """
  36
  37 #define resNotFound -192 /* Can't include <Errors.h> because of Python's "errors.h" */
  38
  39 #ifdef HAVE_UNIVERSAL_HEADERS
  40 #define WindowPeek WindowPtr
  41 #endif
  42 """
  43
  44 finalstuff = finalstuff + """
  45 /* Return the object corresponding to the window, or NULL */
  46
  47 PyObject *
  48 WinObj_WhichWindow(w)
  49         WindowPtr w;
  50 {
  51         PyObject *it;
  52
  53         /* XXX What if we find a stdwin window or a window belonging
  54                to some other package? */
  55         if (w == NULL)
  56                 it = NULL;
  57         else
  58                 it = (PyObject *) GetWRefCon(w);
  59         if (it == NULL || ((WindowObject *)it)->ob_itself != w)
  60                 it = Py_None;
  61         Py_INCREF(it);
  62         return it;
  63 }
  64 """
  65
  66 class MyObjectDefinition(GlobalObjectDefinition):
  67         def outputCheckNewArg(self):
  68                 Output("if (itself == NULL) return PyMac_Error(resNotFound);")
  69         def outputInitStructMembers(self):
  70                 GlobalObjectDefinition.outputInitStructMembers(self)
  71                 Output("SetWRefCon(itself, (long)it);")
  72         def outputCheckConvertArg(self):
  73                 OutLbrace("if (DlgObj_Check(v))")
  74                 Output("*p_itself = ((WindowObject *)v)->ob_itself;")
  75                 Output("return 1;")
  76                 OutRbrace()
  77                 Out("""
  78                 if (v == Py_None) { *p_itself = NULL; return 1; }
  79                 if (PyInt_Check(v)) { *p_itself = (WindowPtr)PyInt_AsLong(v); return 1; }
  80                 """)
  81         def outputFreeIt(self, itselfname):
  82                 Output("DisposeWindow(%s);", itselfname)
  83
  84 # From here on it's basically all boiler plate...
  85
  86 # Create the generator groups and link them
  87 module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
  88 object = MyObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
  89 module.addobject(object)
  90
  91 # Create the generator classes used to populate the lists
  92 Function = OSErrFunctionGenerator
  93 Method = OSErrMethodGenerator
  94
  95 # Create and populate the lists
  96 functions = []
  97 methods = []
  98 execfile(INPUTFILE)
  99
 100 # Add a manual routine for converting integer WindowPtr's (as returned by
 101 # various event routines) to a WindowObject.
 102 whichwin_body = """
 103 long ptr;
 104
 105 if ( !PyArg_ParseTuple(_args, "i", &ptr) )
 106         return NULL;
 107 return WinObj_WhichWindow((WindowPtr)ptr);
 108 """
 109
 110 f = ManualGenerator("WhichWindow", whichwin_body)
 111 f.docstring = lambda : "Resolve an integer WindowPtr address to a Window object"
 112
 113 functions.append(f)
 114
 115 # add the populated lists to the generator groups
 116 # (in a different wordl the scan program would generate this)
 117 for f in functions: module.add(f)
 118 for f in methods: object.add(f)
 119
 120
 121
 122 # generate output (open the output file as late as possible)
 123 SetOutputFileName(OUTPUTFILE)
 124 module.generate()