256 lines
8.8 KiB
Python
256 lines
8.8 KiB
Python
# This script generates a Python interface for an Apple Macintosh Manager.
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# It uses the "bgen" package to generate C code.
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# The function specifications are generated by scanning the mamager's header file,
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# using the "scantools" package (customized for this particular manager).
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import string
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# Declarations that change for each manager
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MACHEADERFILE = 'Lists.h' # The Apple header file
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MODNAME = '_List' # The name of the module
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OBJECTNAME = 'List' # The basic name of the objects used here
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KIND = 'Handle' # Usually 'Ptr' or 'Handle'
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# The following is *usually* unchanged but may still require tuning
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MODPREFIX = 'List' # The prefix for module-wide routines
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OBJECTTYPE = "ListHandle" # The C type used to represent them
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OBJECTPREFIX = MODPREFIX + 'Obj' # The prefix for object methods
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INPUTFILE = string.lower(MODPREFIX) + 'gen.py' # The file generated by the scanner
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OUTPUTFILE = MODNAME + "module.c" # The file generated by this program
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from macsupport import *
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# Create the type objects
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ListHandle = OpaqueByValueType("ListHandle", "ListObj")
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ListRef = ListHandle # Obsolete, but used in Lists.h
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Cell = Point
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ListBounds = Rect
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ListBounds_ptr = Rect_ptr
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ListDefSpec = ListDefSpec_ptr = OpaqueType("ListDefSpec", "PyMac_BuildListDefSpec", "PyMac_GetListDefSpec")
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VarOutBufferShortsize = VarHeapOutputBufferType('char', 'short', 's') # (buf, &len)
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InBufferShortsize = VarInputBufferType('char', 'short', 's') # (buf, len)
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RgnHandle = OpaqueByValueType("RgnHandle", "ResObj")
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DataHandle = OpaqueByValueType("DataHandle", "ResObj")
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Handle = OpaqueByValueType("Handle", "ResObj")
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CGrafPtr = OpaqueByValueType("CGrafPtr", "GrafObj")
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EventModifiers = Type("EventModifiers", "H")
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includestuff = includestuff + """
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#include <Carbon/Carbon.h>
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#ifdef USE_TOOLBOX_OBJECT_GLUE
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extern PyObject *_ListObj_New(ListHandle);
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extern int _ListObj_Convert(PyObject *, ListHandle *);
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#define ListObj_New _ListObj_New
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#define ListObj_Convert _ListObj_Convert
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#endif
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#define as_List(x) ((ListHandle)x)
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#define as_Resource(lh) ((Handle)lh)
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static ListDefUPP myListDefFunctionUPP;
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"""
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initstuff = initstuff + """
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myListDefFunctionUPP = NewListDefUPP((ListDefProcPtr)myListDefFunction);
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PyMac_INIT_TOOLBOX_OBJECT_NEW(ListHandle, ListObj_New);
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PyMac_INIT_TOOLBOX_OBJECT_CONVERT(ListHandle, ListObj_Convert);
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"""
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class ListMethodGenerator(MethodGenerator):
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"""Similar to MethodGenerator, but has self as last argument"""
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def parseArgumentList(self, args):
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args, a0 = args[:-1], args[-1]
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t0, n0, m0 = a0
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if m0 != InMode:
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raise ValueError, "method's 'self' must be 'InMode'"
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self.itself = Variable(t0, "_self->ob_itself", SelfMode)
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FunctionGenerator.parseArgumentList(self, args)
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self.argumentList.append(self.itself)
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class MyObjectDefinition(PEP253Mixin, GlobalObjectDefinition):
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# XXXX Should inherit from Resource
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getsetlist = [(
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'listFlags',
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'return Py_BuildValue("l", (long)GetListFlags(self->ob_itself) & 0xff);',
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'if (!PyArg_Parse(v, "B", &(*self->ob_itself)->listFlags)) return -1;',
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None,
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), (
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'selFlags',
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'return Py_BuildValue("l", (long)GetListSelectionFlags(self->ob_itself) & 0xff);',
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'if (!PyArg_Parse(v, "B", &(*self->ob_itself)->selFlags)) return -1;',
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None,
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), (
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'cellSize',
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'return Py_BuildValue("O&", PyMac_BuildPoint, (*self->ob_itself)->cellSize);',
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'if (!PyArg_Parse(v, "O&", PyMac_GetPoint, &(*self->ob_itself)->cellSize)) return -1;',
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None
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)]
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def outputStructMembers(self):
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ObjectDefinition.outputStructMembers(self)
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Output("PyObject *ob_ldef_func;")
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Output("int ob_must_be_disposed;")
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def outputCheckNewArg(self):
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Output("""if (itself == NULL) {
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PyErr_SetString(List_Error,"Cannot create null List");
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return NULL;
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}""")
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def outputInitStructMembers(self):
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ObjectDefinition.outputInitStructMembers(self)
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Output("it->ob_ldef_func = NULL;")
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Output("it->ob_must_be_disposed = 1;")
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Output("SetListRefCon(itself, (long)it);")
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def outputFreeIt(self, itselfname):
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Output("Py_XDECREF(self->ob_ldef_func);")
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Output("self->ob_ldef_func = NULL;")
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Output("SetListRefCon(self->ob_itself, (long)0);")
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Output("if (self->ob_must_be_disposed && %s) LDispose(%s);", itselfname, itselfname)
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# From here on it's basically all boiler plate...
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finalstuff = finalstuff + """
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static void myListDefFunction(SInt16 message,
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Boolean selected,
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Rect *cellRect,
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Cell theCell,
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SInt16 dataOffset,
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SInt16 dataLen,
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ListHandle theList)
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{
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PyObject *listDefFunc, *args, *rv=NULL;
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ListObject *self;
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self = (ListObject*)GetListRefCon(theList);
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if (self == NULL || self->ob_itself != theList)
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return; /* nothing we can do */
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listDefFunc = self->ob_ldef_func;
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if (listDefFunc == NULL)
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return; /* nothing we can do */
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args = Py_BuildValue("hbO&O&hhO", message,
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selected,
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PyMac_BuildRect, cellRect,
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PyMac_BuildPoint, theCell,
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dataOffset,
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dataLen,
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self);
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if (args != NULL) {
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rv = PyEval_CallObject(listDefFunc, args);
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Py_DECREF(args);
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}
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if (rv == NULL) {
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PySys_WriteStderr("error in list definition callback:\\n");
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PyErr_Print();
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} else {
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Py_DECREF(rv);
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}
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}
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"""
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# Create the generator groups and link them
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module = MacModule(MODNAME, MODPREFIX, includestuff, finalstuff, initstuff)
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object = MyObjectDefinition(OBJECTNAME, OBJECTPREFIX, OBJECTTYPE)
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module.addobject(object)
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# Create the generator classes used to populate the lists
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Function = FunctionGenerator
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Method = ListMethodGenerator
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# Create and populate the lists
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functions = []
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methods = []
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execfile(INPUTFILE)
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# Function to convert any handle to a list and vv.
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##f = Function(ListHandle, 'as_List', (Handle, 'h', InMode))
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as_List_body = """
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Handle h;
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ListObject *l;
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if (!PyArg_ParseTuple(_args, "O&", ResObj_Convert, &h))
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return NULL;
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l = (ListObject *)ListObj_New(as_List(h));
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l->ob_must_be_disposed = 0;
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_res = Py_BuildValue("O", l);
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return _res;
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"""
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f = ManualGenerator("as_List", as_List_body)
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f.docstring = lambda: "(Resource)->List.\nReturns List object (which is not auto-freed!)"
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functions.append(f)
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f = Method(Handle, 'as_Resource', (ListHandle, 'lh', InMode))
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methods.append(f)
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# Manual generator for CreateCustomList, due to callback ideosyncracies
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CreateCustomList_body = """\
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Rect rView;
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Rect dataBounds;
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Point cellSize;
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PyObject *listDefFunc;
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ListDefSpec theSpec;
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WindowPtr theWindow;
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Boolean drawIt;
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Boolean hasGrow;
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Boolean scrollHoriz;
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Boolean scrollVert;
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ListHandle outList;
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if (!PyArg_ParseTuple(_args, "O&O&O&(iO)O&bbbb",
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PyMac_GetRect, &rView,
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PyMac_GetRect, &dataBounds,
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PyMac_GetPoint, &cellSize,
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&theSpec.defType, &listDefFunc,
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WinObj_Convert, &theWindow,
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&drawIt,
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&hasGrow,
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&scrollHoriz,
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&scrollVert))
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return NULL;
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/* Carbon applications use the CreateCustomList API */
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theSpec.u.userProc = myListDefFunctionUPP;
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CreateCustomList(&rView,
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&dataBounds,
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cellSize,
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&theSpec,
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theWindow,
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drawIt,
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hasGrow,
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scrollHoriz,
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scrollVert,
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&outList);
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_res = ListObj_New(outList);
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if (_res == NULL)
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return NULL;
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Py_INCREF(listDefFunc);
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((ListObject*)_res)->ob_ldef_func = listDefFunc;
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return _res;\
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"""
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f = ManualGenerator("CreateCustomList", CreateCustomList_body);
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f.docstring = lambda: "(Rect rView, Rect dataBounds, Point cellSize, ListDefSpec theSpec, WindowPtr theWindow, Boolean drawIt, Boolean hasGrow, Boolean scrollHoriz, Boolean scrollVert) -> (ListHandle outList)"
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module.add(f)
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# add the populated lists to the generator groups
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# (in a different wordl the scan program would generate this)
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for f in functions: module.add(f)
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for f in methods: object.add(f)
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# generate output (open the output file as late as possible)
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SetOutputFileName(OUTPUTFILE)
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module.generate()
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