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cpython/Mac/Modules/dlg/dlgsupport.py

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# This script generates the Dialogs interface for Python.
# It uses the "bgen" package to generate C code.
# It execs the file dlggen.py which contain the function definitions
# (dlggen.py was generated by dlgscan.py, scanning the <Dialogs.h> header file).
from macsupport import *
# Create the type objects
DialogPtr = OpaqueByValueType("DialogPtr", "DlgObj")
DialogRef = DialogPtr
# An OptHandle is either a handle or None (in case NULL is passed in).
# This is needed for GetDialogItem().
OptHandle = OpaqueByValueType("Handle", "OptResObj")
ModalFilterProcPtr = InputOnlyType("PyObject*", "O")
ModalFilterProcPtr.passInput = lambda name: "Dlg_PassFilterProc(%s)" % name
ModalFilterUPP = ModalFilterProcPtr
RgnHandle = OpaqueByValueType("RgnHandle", "ResObj")
TEHandle = OpaqueByValueType("TEHandle", "ResObj")
CGrafPtr = OpaqueByValueType("CGrafPtr", "GrafObj")
DITLMethod = Type("DITLMethod", "h")
DialogItemIndex = Type("DialogItemIndex", "h")
DialogItemType = Type("DialogItemType", "h")
DialogItemIndexZeroBased = Type("DialogItemIndexZeroBased", "h")
AlertType = Type("AlertType", "h")
StringPtr = Str255
EventMask = Type("EventMask", "H")
includestuff = includestuff + """
#include <Carbon/Carbon.h>
#ifdef USE_TOOLBOX_OBJECT_GLUE
extern PyObject *_DlgObj_New(DialogRef);
extern PyObject *_DlgObj_WhichDialog(DialogRef);
extern int _DlgObj_Convert(PyObject *, DialogRef *);
#define DlgObj_New _DlgObj_New
#define DlgObj_WhichDialog _DlgObj_WhichDialog
#define DlgObj_Convert _DlgObj_Convert
#endif
/* XXX Shouldn't this be a stack? */
static PyObject *Dlg_FilterProc_callback = NULL;
static pascal Boolean Dlg_UnivFilterProc(DialogPtr dialog,
EventRecord *event,
short *itemHit)
{
Boolean rv;
PyObject *args, *res;
PyObject *callback = Dlg_FilterProc_callback;
if (callback == NULL)
return 0; /* Default behavior */
Dlg_FilterProc_callback = NULL; /* We'll restore it when call successful */
args = Py_BuildValue("O&O&", DlgObj_WhichDialog, dialog, PyMac_BuildEventRecord, event);
if (args == NULL)
res = NULL;
else {
res = PyEval_CallObject(callback, args);
Py_DECREF(args);
}
if (res == NULL) {
PySys_WriteStderr("Exception in Dialog Filter\\n");
PyErr_Print();
*itemHit = -1; /* Fake return item */
return 1; /* We handled it */
}
else {
Dlg_FilterProc_callback = callback;
if (PyInt_Check(res)) {
*itemHit = PyInt_AsLong(res);
rv = 1;
}
else
rv = PyObject_IsTrue(res);
}
Py_DECREF(res);
return rv;
}
static ModalFilterUPP
Dlg_PassFilterProc(PyObject *callback)
{
PyObject *tmp = Dlg_FilterProc_callback;
static ModalFilterUPP UnivFilterUpp = NULL;
Dlg_FilterProc_callback = NULL;
if (callback == Py_None) {
Py_XDECREF(tmp);
return NULL;
}
Py_INCREF(callback);
Dlg_FilterProc_callback = callback;
Py_XDECREF(tmp);
if ( UnivFilterUpp == NULL )
UnivFilterUpp = NewModalFilterUPP(&Dlg_UnivFilterProc);
return UnivFilterUpp;
}
static PyObject *Dlg_UserItemProc_callback = NULL;
static pascal void Dlg_UnivUserItemProc(DialogPtr dialog,
short item)
{
PyObject *args, *res;
if (Dlg_UserItemProc_callback == NULL)
return; /* Default behavior */
Dlg_FilterProc_callback = NULL; /* We'll restore it when call successful */
args = Py_BuildValue("O&h", DlgObj_WhichDialog, dialog, item);
if (args == NULL)
res = NULL;
else {
res = PyEval_CallObject(Dlg_UserItemProc_callback, args);
Py_DECREF(args);
}
if (res == NULL) {
PySys_WriteStderr("Exception in Dialog UserItem proc\\n");
PyErr_Print();
}
Py_XDECREF(res);
return;
}
#if 0
/*
** Treating DialogObjects as WindowObjects is (I think) illegal under Carbon.
** However, as they are still identical under MacOS9 Carbon this is a problem, even
** if we neatly call GetDialogWindow() at the right places: there's one refcon field
** and it points to the DialogObject, so WinObj_WhichWindow will smartly return the
** dialog object, and therefore we still don't have a WindowObject.
** I'll leave the chaining code in place for now, with this comment to warn the
** unsuspecting victims (i.e. me, probably, in a few weeks:-)
*/
extern PyMethodChain WinObj_chain;
#endif
"""
finalstuff = finalstuff + """
/* Return the WindowPtr corresponding to a DialogObject */
#if 0
WindowPtr
DlgObj_ConvertToWindow(PyObject *self)
{
if ( DlgObj_Check(self) )
return GetDialogWindow(((DialogObject *)self)->ob_itself);
return NULL;
}
#endif
/* Return the object corresponding to the dialog, or None */
PyObject *
DlgObj_WhichDialog(DialogPtr d)
{
PyObject *it;
if (d == NULL) {
it = Py_None;
Py_INCREF(it);
} else {
WindowPtr w = GetDialogWindow(d);
it = (PyObject *) GetWRefCon(w);
if (it == NULL || ((DialogObject *)it)->ob_itself != d || !DlgObj_Check(it)) {
#if 0
/* Should do this, but we don't have an ob_freeit for dialogs yet. */
it = WinObj_New(w);
((WindowObject *)it)->ob_freeit = NULL;
#else
it = Py_None;
Py_INCREF(it);
#endif
} else {
Py_INCREF(it);
}
}
return it;
}
"""
initstuff = initstuff + """
PyMac_INIT_TOOLBOX_OBJECT_NEW(DialogPtr, DlgObj_New);
PyMac_INIT_TOOLBOX_OBJECT_NEW(DialogPtr, DlgObj_WhichDialog);
PyMac_INIT_TOOLBOX_OBJECT_CONVERT(DialogPtr, DlgObj_Convert);
"""
# Define a class which specializes our object definition
class MyObjectDefinition(PEP253Mixin, GlobalObjectDefinition):
def __init__(self, name, prefix = None, itselftype = None):
GlobalObjectDefinition.__init__(self, name, prefix, itselftype)
## This won't work in Carbon, so we disable it for all MacPythons:-(
## But see the comment above:-((
## self.basechain = "&WinObj_chain"
def outputInitStructMembers(self):
GlobalObjectDefinition.outputInitStructMembers(self)
Output("SetWRefCon(GetDialogWindow(itself), (long)it);")
def outputCheckNewArg(self):
Output("if (itself == NULL) { Py_INCREF(Py_None); return Py_None; }")
def outputCheckConvertArg(self):
Output("if (v == Py_None) { *p_itself = NULL; return 1; }")
Output("if (PyInt_Check(v)) { *p_itself = (DialogPtr)PyInt_AsLong(v);")
Output(" return 1; }")
def outputCompare(self):
Output()
Output("static int %s_compare(%s *self, %s *other)", self.prefix, self.objecttype, self.objecttype)
OutLbrace()
Output("if ( self->ob_itself > other->ob_itself ) return 1;")
Output("if ( self->ob_itself < other->ob_itself ) return -1;")
Output("return 0;")
OutRbrace()
def outputHash(self):
Output()
Output("static int %s_hash(%s *self)", self.prefix, self.objecttype)
OutLbrace()
Output("return (int)self->ob_itself;")
OutRbrace()
def outputFreeIt(self, itselfname):
Output("DisposeDialog(%s);", itselfname)
# Create the generator groups and link them
module = MacModule('_Dlg', 'Dlg', includestuff, finalstuff, initstuff)
object = MyObjectDefinition('Dialog', 'DlgObj', 'DialogPtr')
module.addobject(object)
# Create the generator classes used to populate the lists
Function = OSErrWeakLinkFunctionGenerator
Method = OSErrWeakLinkMethodGenerator
# Create and populate the lists
functions = []
methods = []
exec(open("dlggen.py").read())
# add the populated lists to the generator groups
for f in functions: module.add(f)
for f in methods: object.add(f)
setuseritembody = """
PyObject *new = NULL;
if (!PyArg_ParseTuple(_args, "|O", &new))
return NULL;
if (Dlg_UserItemProc_callback && new && new != Py_None) {
PyErr_SetString(Dlg_Error, "Another UserItemProc is already installed");
return NULL;
}
if (new == NULL || new == Py_None) {
new = NULL;
_res = Py_None;
Py_INCREF(Py_None);
} else {
Py_INCREF(new);
_res = Py_BuildValue("O&", ResObj_New, (Handle)NewUserItemUPP(Dlg_UnivUserItemProc));
}
Dlg_UserItemProc_callback = new;
return _res;
"""
f = ManualGenerator("SetUserItemHandler", setuseritembody)
module.add(f)
# generate output
SetOutputFileName('_Dlgmodule.c')
module.generate()
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