do not set locale on windows

README.md

@@ -184,7 +184,7 @@ options(
 
 #### Unicode doesn't work in Windows and R 4.2+.
 
-The latest version of R supports Unicode codepage directly. However, radian relies on Python and Python doesn't support Unicode in the way that R supports it. A workaround could be found here: https://github.com/randy3k/radian/issues/269#issuecomment-1169663251
+The latest version of R supports Unicode codepage directly. However, radian relies on Python and Python doesn't support Unicode in the way that R supports it. A workaround could be found here: https://github.com/randy3k/radian/issues/269#issuecomment-1169663251. Though it may break the ploting device (running `plot()` will kill radian).
 
 
 #### I can't specify python runtime in reticulate.

radian/__init__.py

@@ -1,5 +1,5 @@
 from .app import get_app, main
 
-__version__ = '0.6.7'
+__version__ = '0.6.8'
 
 __all__ = ["get_app", "main"]

radian/app.py

@@ -215,16 +215,10 @@ def run(self, options, cleanup=None):
         # enable signal handlers
         os.environ["RCHITECT_REGISTER_SIGNAL_HANDLERS"] = "1"
 
-        if sys.platform.startswith("win"):
-            # avoid "using locale code page other than 1252 may cause problems" warning
-            lc_ctype = os.environ.pop('LC_CTYPE', "en_US.UTF-8")
-        else:
-            lc_ctype = None
-
         rchitect.init(args=args, register_signal_handlers=True)
 
         if sys.platform.startswith("win"):
-            rutils.set_locale(lc_ctype = lc_ctype)
+            rutils.set_utf8()
 
         try:
             rutils.source_radian_profile(options.profile)

radian/rutils.py

@@ -1,7 +1,7 @@
 import os
 import sys
 from rchitect import rcopy, reval, rcall
-from rchitect.interface import roption
+from rchitect.interface import roption, setoption
 from .key_bindings import map_key
 
 def is_ascii(str):
@@ -96,15 +96,14 @@ def register_cleanup(cleanup):
           onexit=True)
 
 
-def set_locale(lc_ctype):
+def set_utf8():
     if sys.platform.startswith("win"):
         ucrt = rcopy(
             reval('compareVersion(paste0(R.version$major, ".", R.version$minor), "4.2.0") >= 0'))
         if ucrt:
             if not os.environ.get("LANG", ""):
-                    os.environ["LANG"] = "en_US.UTF-8"
-            if lc_ctype:
-                reval("suppressWarnings(Sys.setlocale(locale = '{}'))".format(lc_ctype))
+                os.environ["LANG"] = "en_US.UTF-8"
+            setoption("encoding", "UTF-8")
 
 
 def run_on_load_hooks():

setup.py

@@ -43,7 +43,7 @@ def get_version(package):
     python_requires='>=3.6',
     install_requires=[
         # 'rchitect@git+https://github.com/randy3k/rchitect',
-        'rchitect>=0.4.1,<0.5.0',
+        'rchitect>=0.4.3,<0.5.0',
         'prompt_toolkit>=3.0.15,<3.1',
         'pygments>=2.5.0'
     ],