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cpython/Mac/Modules/list/listsupport.py

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