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cpython/Mac/Modules/carbonevt/CarbonEvtsupport.py

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# IBCarbonsupport.py
from macsupport import *
from CarbonEvtscan import RefObjectTypes
# where should this go? macsupport.py?
CFStringRef = OpaqueByValueType('CFStringRef')
for typ in RefObjectTypes:
execstr = "%(name)s = OpaqueByValueType('%(name)s')" % {"name": typ}
exec execstr
if 0:
# these types will have no methods and will merely be opaque blobs
# should write getattr and setattr for them?
StructObjectTypes = ["EventTypeSpec",
"HIPoint",
"HICommand",
"EventHotKeyID",
]
for typ in StructObjectTypes:
execstr = "%(name)s = OpaqueType('%(name)s')" % {"name": typ}
exec execstr
EventHotKeyID = OpaqueByValueType("EventHotKeyID", "EventHotKeyID")
EventTypeSpec_ptr = OpaqueType("EventTypeSpec", "EventTypeSpec")
# is this the right type for the void * in GetEventParameter
#void_ptr = FixedInputBufferType(1024)
void_ptr = stringptr
# here are some types that are really other types
class MyVarInputBufferType(VarInputBufferType):
def passInput(self, name):
return "%s__len__, %s__in__" % (name, name)
MyInBuffer = MyVarInputBufferType('char', 'long', 'l') # (buf, len)
EventTime = double
EventTimeout = EventTime
EventTimerInterval = EventTime
EventAttributes = UInt32
EventParamName = OSType
EventParamType = OSType
EventPriority = SInt16
EventMask = UInt16
EventComparatorUPP = FakeType("(EventComparatorUPP)0")
EventLoopTimerUPP = FakeType("(EventLoopTimerUPP)0")
EventHandlerUPP = FakeType("(EventHandlerUPP)0")
EventHandlerUPP = FakeType("(EventHandlerUPP)0")
EventComparatorProcPtr = FakeType("(EventComparatorProcPtr)0")
EventLoopTimerProcPtr = FakeType("(EventLoopTimerProcPtr)0")
EventHandlerProcPtr = FakeType("(EventHandlerProcPtr)0")
CarbonEventsFunction = OSErrFunctionGenerator
CarbonEventsMethod = OSErrMethodGenerator
class EventHandlerRefMethod(OSErrMethodGenerator):
def precheck(self):
OutLbrace('if (_self->ob_itself == NULL)')
Output('PyErr_SetString(CarbonEvents_Error, "Handler has been removed");')
Output('return NULL;')
OutRbrace()
RgnHandle = OpaqueByValueType("RgnHandle", "ResObj")
GrafPtr = OpaqueByValueType("GrafPtr", "GrafObj")
MouseTrackingResult = UInt16
includestuff = r"""
#ifdef WITHOUT_FRAMEWORKS
#include <CarbonEvents.h>
#else
#include <Carbon/Carbon.h>
#endif
#include "macglue.h"
/* Macro to test whether a weak-loaded CFM function exists */
#define PyMac_PRECHECK(rtn) do { if ( &rtn == NULL ) {\
PyErr_SetString(PyExc_NotImplementedError, \
"Not available in this shared library/OS version"); \
return; \
}} while(0)
#define USE_MAC_MP_MULTITHREADING 0
#if USE_MAC_MP_MULTITHREADING
static PyThreadState *_save;
static MPCriticalRegionID reentrantLock;
#endif /* USE_MAC_MP_MULTITHREADING */
extern int CFStringRef_New(CFStringRef *);
extern int CFStringRef_Convert(PyObject *, CFStringRef *);
extern int CFBundleRef_Convert(PyObject *, CFBundleRef *);
int EventTargetRef_Convert(PyObject *, EventTargetRef *);
PyObject *EventHandlerCallRef_New(EventHandlerCallRef itself);
PyObject *EventRef_New(EventRef itself);
/********** EventTypeSpec *******/
static PyObject*
EventTypeSpec_New(EventTypeSpec *in)
{
return Py_BuildValue("ll", in->eventClass, in->eventKind);
}
static int
EventTypeSpec_Convert(PyObject *v, EventTypeSpec *out)
{
if (PyArg_Parse(v, "(O&l)",
PyMac_GetOSType, &(out->eventClass),
&(out->eventKind)))
return 1;
return NULL;
}
/********** end EventTypeSpec *******/
/********** HIPoint *******/
#if 0 /* XXX doesn't compile */
static PyObject*
HIPoint_New(HIPoint *in)
{
return Py_BuildValue("ff", in->x, in->y);
}
static int
HIPoint_Convert(PyObject *v, HIPoint *out)
{
if (PyArg_ParseTuple(v, "ff", &(out->x), &(out->y)))
return 1;
return NULL;
}
#endif
/********** end HIPoint *******/
/********** EventHotKeyID *******/
static PyObject*
EventHotKeyID_New(EventHotKeyID *in)
{
return Py_BuildValue("ll", in->signature, in->id);
}
static int
EventHotKeyID_Convert(PyObject *v, EventHotKeyID *out)
{
if (PyArg_ParseTuple(v, "ll", &out->signature, &out->id))
return 1;
return NULL;
}
/********** end EventHotKeyID *******/
/******** myEventHandler ***********/
static EventHandlerUPP myEventHandlerUPP;
static pascal OSStatus
myEventHandler(EventHandlerCallRef handlerRef, EventRef event, void *outPyObject) {
PyObject *retValue;
int status;
#if USE_MAC_MP_MULTITHREADING
MPEnterCriticalRegion(reentrantLock, kDurationForever);
PyEval_RestoreThread(_save);
#endif /* USE_MAC_MP_MULTITHREADING */
retValue = PyObject_CallFunction((PyObject *)outPyObject, "O&O&",
EventHandlerCallRef_New, handlerRef,
EventRef_New, event);
if (retValue == NULL) {
PySys_WriteStderr("Error in event handler callback:\n");
PyErr_Print(); /* this also clears the error */
status = noErr; /* complain? how? */
} else {
if (retValue == Py_None)
status = noErr;
else if (PyInt_Check(retValue)) {
status = PyInt_AsLong(retValue);
} else
status = noErr; /* wrong object type, complain? */
Py_DECREF(retValue);
}
#if USE_MAC_MP_MULTITHREADING
_save = PyEval_SaveThread();
MPExitCriticalRegion(reentrantLock);
#endif /* USE_MAC_MP_MULTITHREADING */
return status;
}
/******** end myEventHandler ***********/
"""
initstuff = initstuff + """
PyMac_PRECHECK(NewEventHandlerUPP); /* This can fail if CarbonLib is too old */
myEventHandlerUPP = NewEventHandlerUPP(myEventHandler);
"""
module = MacModule('_CarbonEvt', 'CarbonEvents', includestuff, finalstuff, initstuff)
class EventHandlerRefObjectDefinition(PEP253Mixin, GlobalObjectDefinition):
def outputStructMembers(self):
Output("%s ob_itself;", self.itselftype)
Output("PyObject *ob_callback;")
def outputInitStructMembers(self):
Output("it->ob_itself = %sitself;", self.argref)
Output("it->ob_callback = NULL;")
def outputFreeIt(self, name):
OutLbrace("if (self->ob_itself != NULL)")
Output("RemoveEventHandler(self->ob_itself);")
Output("Py_DECREF(self->ob_callback);")
OutRbrace()
class MyGlobalObjectDefinition(PEP253Mixin, GlobalObjectDefinition):
pass
for typ in RefObjectTypes:
if typ == 'EventHandlerRef':
EventHandlerRefobject = EventHandlerRefObjectDefinition('EventHandlerRef')
else:
execstr = typ + 'object = MyGlobalObjectDefinition(typ)'
exec execstr
module.addobject(eval(typ + 'object'))
functions = []
for typ in RefObjectTypes: ## go thru all ObjectTypes as defined in CarbonEventsscan.py
# initialize the lists for carbongen to fill
execstr = typ + 'methods = []'
exec execstr
execfile('CarbonEventsgen.py')
for f in functions: module.add(f) # add all the functions carboneventsgen put in the list
for typ in RefObjectTypes: ## go thru all ObjectTypes as defined in CarbonEventsscan.py
methods = eval(typ + 'methods') ## get a reference to the method list from the main namespace
obj = eval(typ + 'object') ## get a reference to the object
for m in methods: obj.add(m) ## add each method in the list to the object
removeeventhandler = """
OSStatus _err;
if (_self->ob_itself == NULL) {
PyErr_SetString(CarbonEvents_Error, "Handler has been removed");
return NULL;
}
if (!PyArg_ParseTuple(_args, ""))
return NULL;
_err = RemoveEventHandler(_self->ob_itself);
if (_err != noErr) return PyMac_Error(_err);
_self->ob_itself = NULL;
Py_DECREF(_self->ob_callback);
_self->ob_callback = NULL;
Py_INCREF(Py_None);
_res = Py_None;
return _res;"""
f = ManualGenerator("RemoveEventHandler", removeeventhandler);
f.docstring = lambda: "() -> None"
EventHandlerRefobject.add(f)
installeventhandler = """
EventTypeSpec inSpec;
PyObject *callback;
EventHandlerRef outRef;
OSStatus _err;
if (!PyArg_ParseTuple(_args, "O&O", EventTypeSpec_Convert, &inSpec, &callback))
return NULL;
_err = InstallEventHandler(_self->ob_itself, myEventHandlerUPP, 1, &inSpec, (void *)callback, &outRef);
if (_err != noErr) return PyMac_Error(_err);
_res = EventHandlerRef_New(outRef);
if (_res != NULL) {
((EventHandlerRefObject*)_res)->ob_callback = callback;
Py_INCREF(callback);
}
return _res;"""
f = ManualGenerator("InstallEventHandler", installeventhandler);
f.docstring = lambda: "(EventTypeSpec inSpec, Method callback) -> (EventHandlerRef outRef)"
EventTargetRefobject.add(f)
# This may not be the best, but at least it lets you get the raw data back into python as a string. You'll have to cut it up yourself and parse the result.
geteventparameter = """
UInt32 bufferSize;
EventParamName inName;
EventParamType inType;
OSErr _err;
void * buffer;
if (!PyArg_ParseTuple(_args, "O&O&", PyMac_GetOSType, &inName, PyMac_GetOSType, &inType))
return NULL;
/* Figure out the size by passing a null buffer to GetEventParameter */
_err = GetEventParameter(_self->ob_itself, inName, inType, NULL, 0, &bufferSize, NULL);
if (_err != noErr)
return PyMac_Error(_err);
buffer = PyMem_NEW(char, bufferSize);
if (buffer == NULL)
return PyErr_NoMemory();
_err = GetEventParameter(_self->ob_itself, inName, inType, NULL, bufferSize, NULL, buffer);
if (_err != noErr) {
PyMem_DEL(buffer);
return PyMac_Error(_err);
}
_res = Py_BuildValue("s#", buffer, bufferSize);
PyMem_DEL(buffer);
return _res;
"""
f = ManualGenerator("GetEventParameter", geteventparameter);
f.docstring = lambda: "(EventParamName eventName, EventParamType eventType) -> (String eventParamData)"
EventRefobject.add(f)
runappeventloop = """
#if USE_MAC_MP_MULTITHREADING
if (MPCreateCriticalRegion(&reentrantLock) != noErr) {
PySys_WriteStderr("lock failure\\n");
return NULL;
}
_save = PyEval_SaveThread();
#endif /* USE_MAC_MP_MULTITHREADING */
RunApplicationEventLoop();
#if USE_MAC_MP_MULTITHREADING
PyEval_RestoreThread(_save);
MPDeleteCriticalRegion(reentrantLock);
#endif /* USE_MAC_MP_MULTITHREADING */
Py_INCREF(Py_None);
return Py_None;
"""
f = ManualGenerator("RunApplicationEventLoop", runappeventloop);
f.docstring = lambda: "() -> ()"
module.add(f)
SetOutputFileName('_CarbonEvtmodule.c')
module.generate()
##import os
##os.system("python setup.py build")
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