/usr/lib/pypy/lib_pypy/_tkinter/app.py is in pypy-tk 5.6.0+dfsg-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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from .tklib_cffi import ffi as tkffi, lib as tklib
from . import TclError
from .tclobj import (TclObject, FromObj, FromTclString, AsObj, TypeCache,
FromBignumObj, FromWideIntObj)
import contextlib
import sys
import threading
import time
class _DummyLock(object):
"A lock-like object that does not do anything"
def acquire(self):
pass
def release(self):
pass
def __enter__(self):
pass
def __exit__(self, *exc):
pass
def varname_converter(input):
if isinstance(input, TclObject):
return input.string
if b'\0' in input:
raise ValueError("NUL character in string")
return input
def Tcl_AppInit(app):
if tklib.Tcl_Init(app.interp) == tklib.TCL_ERROR:
app.raiseTclError()
skip_tk_init = tklib.Tcl_GetVar(
app.interp, "_tkinter_skip_tk_init", tklib.TCL_GLOBAL_ONLY)
if skip_tk_init and tkffi.string(skip_tk_init) == "1":
return
if tklib.Tk_Init(app.interp) == tklib.TCL_ERROR:
app.raiseTclError()
class _CommandData(object):
def __new__(cls, app, name, func):
self = object.__new__(cls)
self.app = app
self.name = name
self.func = func
handle = tkffi.new_handle(self)
app._commands[name] = handle # To keep the command alive
return tkffi.cast("ClientData", handle)
@tkffi.callback("Tcl_CmdProc")
def PythonCmd(clientData, interp, argc, argv):
self = tkffi.from_handle(clientData)
assert self.app.interp == interp
with self.app._tcl_lock_released():
try:
args = [FromTclString(tkffi.string(arg)) for arg in argv[1:argc]]
result = self.func(*args)
obj = AsObj(result)
tklib.Tcl_SetObjResult(interp, obj)
except:
self.app.errorInCmd = True
self.app.exc_info = sys.exc_info()
return tklib.TCL_ERROR
else:
return tklib.TCL_OK
@tkffi.callback("Tcl_CmdDeleteProc")
def PythonCmdDelete(clientData):
self = tkffi.from_handle(clientData)
app = self.app
del app._commands[self.name]
return
class TkApp(object):
_busywaitinterval = 0.02 # 20ms.
def __new__(cls, screenName, baseName, className,
interactive, wantobjects, wantTk, sync, use):
if not wantobjects:
raise NotImplementedError("wantobjects=True only")
self = object.__new__(cls)
self.interp = tklib.Tcl_CreateInterp()
self._wantobjects = wantobjects
self.threaded = bool(tklib.Tcl_GetVar2Ex(
self.interp, "tcl_platform", "threaded",
tklib.TCL_GLOBAL_ONLY))
self.thread_id = tklib.Tcl_GetCurrentThread()
self.dispatching = False
self.quitMainLoop = False
self.errorInCmd = False
if not self.threaded:
# TCL is not thread-safe, calls needs to be serialized.
self._tcl_lock = threading.RLock()
else:
self._tcl_lock = _DummyLock()
self._typeCache = TypeCache()
self._commands = {}
# Delete the 'exit' command, which can screw things up
tklib.Tcl_DeleteCommand(self.interp, "exit")
if screenName is not None:
tklib.Tcl_SetVar2(self.interp, "env", "DISPLAY", screenName,
tklib.TCL_GLOBAL_ONLY)
if interactive:
tklib.Tcl_SetVar(self.interp, "tcl_interactive", "1",
tklib.TCL_GLOBAL_ONLY)
else:
tklib.Tcl_SetVar(self.interp, "tcl_interactive", "0",
tklib.TCL_GLOBAL_ONLY)
# This is used to get the application class for Tk 4.1 and up
argv0 = className.lower()
tklib.Tcl_SetVar(self.interp, "argv0", argv0,
tklib.TCL_GLOBAL_ONLY)
if not wantTk:
tklib.Tcl_SetVar(self.interp, "_tkinter_skip_tk_init", "1",
tklib.TCL_GLOBAL_ONLY)
# some initial arguments need to be in argv
if sync or use:
args = ""
if sync:
args += "-sync"
if use:
if sync:
args += " "
args += "-use " + use
tklib.Tcl_SetVar(self.interp, "argv", args,
tklib.TCL_GLOBAL_ONLY)
Tcl_AppInit(self)
# EnableEventHook()
self._typeCache.add_extra_types(self)
return self
def __del__(self):
tklib.Tcl_DeleteInterp(self.interp)
# DisableEventHook()
def raiseTclError(self):
if self.errorInCmd:
self.errorInCmd = False
raise self.exc_info[0], self.exc_info[1], self.exc_info[2]
raise TclError(tkffi.string(tklib.Tcl_GetStringResult(self.interp)))
def wantobjects(self):
return self._wantobjects
def _check_tcl_appartment(self):
if self.threaded and self.thread_id != tklib.Tcl_GetCurrentThread():
raise RuntimeError("Calling Tcl from different appartment")
@contextlib.contextmanager
def _tcl_lock_released(self):
"Context manager to temporarily release the tcl lock."
self._tcl_lock.release()
yield
self._tcl_lock.acquire()
def loadtk(self):
# We want to guard against calling Tk_Init() multiple times
err = tklib.Tcl_Eval(self.interp, "info exists tk_version")
if err == tklib.TCL_ERROR:
self.raiseTclError()
tk_exists = tklib.Tcl_GetStringResult(self.interp)
if not tk_exists or tkffi.string(tk_exists) != "1":
err = tklib.Tk_Init(self.interp)
if err == tklib.TCL_ERROR:
self.raiseTclError()
def _var_invoke(self, func, *args, **kwargs):
if self.threaded and self.thread_id != tklib.Tcl_GetCurrentThread():
# The current thread is not the interpreter thread.
# Marshal the call to the interpreter thread, then wait
# for completion.
raise NotImplementedError("Call from another thread")
return func(*args, **kwargs)
def _getvar(self, name1, name2=None, global_only=False):
name1 = varname_converter(name1)
if not name2:
name2 = tkffi.NULL
flags=tklib.TCL_LEAVE_ERR_MSG
if global_only:
flags |= tklib.TCL_GLOBAL_ONLY
with self._tcl_lock:
res = tklib.Tcl_GetVar2Ex(self.interp, name1, name2, flags)
if not res:
self.raiseTclError()
assert self._wantobjects
return FromObj(self, res)
def _setvar(self, name1, value, global_only=False):
name1 = varname_converter(name1)
# XXX Acquire tcl lock???
newval = AsObj(value)
flags=tklib.TCL_LEAVE_ERR_MSG
if global_only:
flags |= tklib.TCL_GLOBAL_ONLY
with self._tcl_lock:
res = tklib.Tcl_SetVar2Ex(self.interp, name1, tkffi.NULL,
newval, flags)
if not res:
self.raiseTclError()
def _unsetvar(self, name1, name2=None, global_only=False):
name1 = varname_converter(name1)
if not name2:
name2 = tkffi.NULL
flags=tklib.TCL_LEAVE_ERR_MSG
if global_only:
flags |= tklib.TCL_GLOBAL_ONLY
with self._tcl_lock:
res = tklib.Tcl_UnsetVar2(self.interp, name1, name2, flags)
if res == tklib.TCL_ERROR:
self.raiseTclError()
def getvar(self, name1, name2=None):
return self._var_invoke(self._getvar, name1, name2)
def globalgetvar(self, name1, name2=None):
return self._var_invoke(self._getvar, name1, name2, global_only=True)
def setvar(self, name1, value):
return self._var_invoke(self._setvar, name1, value)
def globalsetvar(self, name1, value):
return self._var_invoke(self._setvar, name1, value, global_only=True)
def unsetvar(self, name1, name2=None):
return self._var_invoke(self._unsetvar, name1, name2)
def globalunsetvar(self, name1, name2=None):
return self._var_invoke(self._unsetvar, name1, name2, global_only=True)
# COMMANDS
def createcommand(self, cmdName, func):
if not callable(func):
raise TypeError("command not callable")
if self.threaded and self.thread_id != tklib.Tcl_GetCurrentThread():
raise NotImplementedError("Call from another thread")
clientData = _CommandData(self, cmdName, func)
if self.threaded and self.thread_id != tklib.Tcl_GetCurrentThread():
raise NotImplementedError("Call from another thread")
with self._tcl_lock:
res = tklib.Tcl_CreateCommand(
self.interp, cmdName, _CommandData.PythonCmd,
clientData, _CommandData.PythonCmdDelete)
if not res:
raise TclError("can't create Tcl command")
def deletecommand(self, cmdName):
if self.threaded and self.thread_id != tklib.Tcl_GetCurrentThread():
raise NotImplementedError("Call from another thread")
with self._tcl_lock:
res = tklib.Tcl_DeleteCommand(self.interp, cmdName)
if res == -1:
raise TclError("can't delete Tcl command")
def call(self, *args):
flags = tklib.TCL_EVAL_DIRECT | tklib.TCL_EVAL_GLOBAL
# If args is a single tuple, replace with contents of tuple
if len(args) == 1 and isinstance(args[0], tuple):
args = args[0]
if self.threaded and self.thread_id != tklib.Tcl_GetCurrentThread():
# We cannot call the command directly. Instead, we must
# marshal the parameters to the interpreter thread.
raise NotImplementedError("Call from another thread")
objects = tkffi.new("Tcl_Obj*[]", len(args))
argc = len(args)
try:
for i, arg in enumerate(args):
if arg is None:
argc = i
break
obj = AsObj(arg)
tklib.Tcl_IncrRefCount(obj)
objects[i] = obj
with self._tcl_lock:
res = tklib.Tcl_EvalObjv(self.interp, argc, objects, flags)
if res == tklib.TCL_ERROR:
self.raiseTclError()
else:
result = self._callResult()
finally:
for obj in objects:
if obj:
tklib.Tcl_DecrRefCount(obj)
return result
def _callResult(self):
assert self._wantobjects
value = tklib.Tcl_GetObjResult(self.interp)
# Not sure whether the IncrRef is necessary, but something
# may overwrite the interpreter result while we are
# converting it.
tklib.Tcl_IncrRefCount(value)
res = FromObj(self, value)
tklib.Tcl_DecrRefCount(value)
return res
def eval(self, script):
self._check_tcl_appartment()
with self._tcl_lock:
res = tklib.Tcl_Eval(self.interp, script)
if res == tklib.TCL_ERROR:
self.raiseTclError()
return tkffi.string(tklib.Tcl_GetStringResult(self.interp))
def evalfile(self, filename):
self._check_tcl_appartment()
with self._tcl_lock:
res = tklib.Tcl_EvalFile(self.interp, filename)
if res == tklib.TCL_ERROR:
self.raiseTclError()
return tkffi.string(tklib.Tcl_GetStringResult(self.interp))
def split(self, arg):
if isinstance(arg, TclObject):
objc = tkffi.new("int*")
objv = tkffi.new("Tcl_Obj***")
status = tklib.Tcl_ListObjGetElements(self.interp, arg._value, objc, objv)
if status == tklib.TCL_ERROR:
return FromObj(self, arg._value)
if objc == 0:
return ''
elif objc == 1:
return FromObj(self, objv[0][0])
result = []
for i in range(objc[0]):
result.append(FromObj(self, objv[0][i]))
return tuple(result)
elif isinstance(arg, tuple):
return self._splitObj(arg)
elif isinstance(arg, unicode):
arg = arg.encode('utf8')
return self._split(arg)
def splitlist(self, arg):
if isinstance(arg, TclObject):
objc = tkffi.new("int*")
objv = tkffi.new("Tcl_Obj***")
status = tklib.Tcl_ListObjGetElements(self.interp, arg._value, objc, objv)
if status == tklib.TCL_ERROR:
self.raiseTclError()
result = []
for i in range(objc[0]):
result.append(FromObj(self, objv[0][i]))
return tuple(result)
elif isinstance(arg, tuple):
return arg
elif isinstance(arg, unicode):
arg = arg.encode('utf8')
argc = tkffi.new("int*")
argv = tkffi.new("char***")
res = tklib.Tcl_SplitList(self.interp, arg, argc, argv)
if res == tklib.TCL_ERROR:
self.raiseTclError()
result = tuple(tkffi.string(argv[0][i])
for i in range(argc[0]))
tklib.Tcl_Free(argv[0])
return result
def _splitObj(self, arg):
if isinstance(arg, tuple):
size = len(arg)
result = None
# Recursively invoke SplitObj for all tuple items.
# If this does not return a new object, no action is
# needed.
for i in range(size):
elem = arg[i]
newelem = self._splitObj(elem)
if result is None:
if newelem == elem:
continue
result = [None] * size
for k in range(i):
result[k] = arg[k]
result[i] = newelem
if result is not None:
return tuple(result)
elif isinstance(arg, basestring):
argc = tkffi.new("int*")
argv = tkffi.new("char***")
if isinstance(arg, unicode):
arg = arg.encode('utf-8')
list_ = str(arg)
res = tklib.Tcl_SplitList(tkffi.NULL, list_, argc, argv)
if res != tklib.TCL_OK:
return arg
tklib.Tcl_Free(argv[0])
if argc[0] > 1:
return self._split(list_)
return arg
def _split(self, arg):
argc = tkffi.new("int*")
argv = tkffi.new("char***")
res = tklib.Tcl_SplitList(tkffi.NULL, arg, argc, argv)
if res == tklib.TCL_ERROR:
# Not a list.
# Could be a quoted string containing funnies, e.g. {"}.
# Return the string itself.
return arg
try:
if argc[0] == 0:
return ""
elif argc[0] == 1:
return tkffi.string(argv[0][0])
else:
return tuple(self._split(argv[0][i])
for i in range(argc[0]))
finally:
tklib.Tcl_Free(argv[0])
def getboolean(self, s):
if isinstance(s, (int, long)):
return bool(s)
if isinstance(s, unicode):
s = str(s)
if '\x00' in s:
raise TypeError
v = tkffi.new("int*")
res = tklib.Tcl_GetBoolean(self.interp, s, v)
if res == tklib.TCL_ERROR:
self.raiseTclError()
return bool(v[0])
def getint(self, s):
if isinstance(s, (int, long)):
return s
if isinstance(s, unicode):
s = str(s)
if '\x00' in s:
raise TypeError
if tklib.HAVE_LIBTOMMATH or tklib.HAVE_WIDE_INT_TYPE:
value = tklib.Tcl_NewStringObj(s, -1)
if not value:
self.raiseTclError()
try:
if tklib.HAVE_LIBTOMMATH:
return FromBignumObj(self, value)
else:
return FromWideIntObj(self, value)
finally:
tklib.Tcl_DecrRefCount(value)
else:
v = tkffi.new("int*")
res = tklib.Tcl_GetInt(self.interp, s, v)
if res == tklib.TCL_ERROR:
self.raiseTclError()
return v[0]
def getdouble(self, s):
if isinstance(s, float):
return s
if isinstance(s, unicode):
s = str(s)
if '\x00' in s:
raise TypeError
v = tkffi.new("double*")
res = tklib.Tcl_GetDouble(self.interp, s, v)
if res == tklib.TCL_ERROR:
self.raiseTclError()
return v[0]
def exprboolean(self, s):
if '\x00' in s:
raise TypeError
v = tkffi.new("int*")
res = tklib.Tcl_ExprBoolean(self.interp, s, v)
if res == tklib.TCL_ERROR:
self.raiseTclError()
return v[0]
def exprlong(self, s):
if '\x00' in s:
raise TypeError
v = tkffi.new("long*")
res = tklib.Tcl_ExprLong(self.interp, s, v)
if res == tklib.TCL_ERROR:
self.raiseTclError()
return v[0]
def exprdouble(self, s):
if '\x00' in s:
raise TypeError
v = tkffi.new("double*")
res = tklib.Tcl_ExprDouble(self.interp, s, v)
if res == tklib.TCL_ERROR:
self.raiseTclError()
return v[0]
def exprstring(self, s):
if '\x00' in s:
raise TypeError
res = tklib.Tcl_ExprString(self.interp, s)
if res == tklib.TCL_ERROR:
self.raiseTclError()
return tkffi.string(tklib.Tcl_GetStringResult(self.interp))
def mainloop(self, threshold):
self._check_tcl_appartment()
self.dispatching = True
while (tklib.Tk_GetNumMainWindows() > threshold and
not self.quitMainLoop and not self.errorInCmd):
if self.threaded:
result = tklib.Tcl_DoOneEvent(0)
else:
with self._tcl_lock:
result = tklib.Tcl_DoOneEvent(tklib.TCL_DONT_WAIT)
if result == 0:
time.sleep(self._busywaitinterval)
if result < 0:
break
self.dispatching = False
self.quitMainLoop = False
if self.errorInCmd:
self.errorInCmd = False
raise self.exc_info[0], self.exc_info[1], self.exc_info[2]
def quit(self):
self.quitMainLoop = True
def _createbytearray(self, buf):
"""Convert Python string or any buffer compatible object to Tcl
byte-array object. Use it to pass binary data (e.g. image's
data) to Tcl/Tk commands."""
cdata = tkffi.new("char[]", buf)
res = tklib.Tcl_NewByteArrayObj(cdata, len(buf))
if not res:
self.raiseTclError()
return TclObject(res)
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