import io
import os
import shlex
import sys
import tempfile
import tokenize
from tkinter import filedialog
from tkinter import messagebox
from tkinter.simpledialog import askstring
import idlelib
from idlelib.config import idleConf
from idlelib.util import py_extensions
py_extensions = ' '.join("*"+ext for ext in py_extensions)
encoding = 'utf-8'
if sys.platform == 'win32':
errors = 'surrogatepass'
else:
errors = 'surrogateescape'
class IOBinding:
# One instance per editor Window so methods know which to save, close.
# Open returns focus to self.editwin if aborted.
# EditorWindow.open_module, others, belong here.
def __init__(self, editwin):
self.editwin = editwin
self.text = editwin.text
self.__id_open = self.text.bind("<<open-window-from-file>>", self.open)
self.__id_save = self.text.bind("<<save-window>>", self.save)
self.__id_saveas = self.text.bind("<<save-window-as-file>>",
self.save_as)
self.__id_savecopy = self.text.bind("<<save-copy-of-window-as-file>>",
self.save_a_copy)
self.fileencoding = 'utf-8'
self.__id_print = self.text.bind("<<print-window>>", self.print_window)
def close(self):
# Undo command bindings
self.text.unbind("<<open-window-from-file>>", self.__id_open)
self.text.unbind("<<save-window>>", self.__id_save)
self.text.unbind("<<save-window-as-file>>",self.__id_saveas)
self.text.unbind("<<save-copy-of-window-as-file>>", self.__id_savecopy)
self.text.unbind("<<print-window>>", self.__id_print)
# Break cycles
self.editwin = None
self.text = None
self.filename_change_hook = None
def get_saved(self):
return self.editwin.get_saved()
def set_saved(self, flag):
self.editwin.set_saved(flag)
def reset_undo(self):
self.editwin.reset_undo()
filename_change_hook = None
def set_filename_change_hook(self, hook):
self.filename_change_hook = hook
filename = None
dirname = None
def set_filename(self, filename):
if filename and os.path.isdir(filename):
self.filename = None
self.dirname = filename
else:
self.filename = filename
self.dirname = None
self.set_saved(1)
if self.filename_change_hook:
self.filename_change_hook()
def open(self, event=None, editFile=None):
flist = self.editwin.flist
# Save in case parent window is closed (ie, during askopenfile()).
if flist:
if not editFile:
filename = self.askopenfile()
else:
filename=editFile
if filename:
# If editFile is valid and already open, flist.open will
# shift focus to its existing window.
# If the current window exists and is a fresh unnamed,
# unmodified editor window (not an interpreter shell),
# pass self.loadfile to flist.open so it will load the file
# in the current window (if the file is not already open)
# instead of a new window.
if (self.editwin and
not getattr(self.editwin, 'interp', None) and
not self.filename and
self.get_saved()):
flist.open(filename, self.loadfile)
else:
flist.open(filename)
else:
if self.text:
self.text.focus_set()
return "break"
# Code for use outside IDLE:
if self.get_saved():
reply = self.maybesave()
if reply == "cancel":
self.text.focus_set()
return "break"
if not editFile:
filename = self.askopenfile()
else:
filename=editFile
if filename:
self.loadfile(filename)
else:
self.text.focus_set()
return "break"
eol_convention = os.linesep # default
def loadfile(self, filename):
try:
try:
with tokenize.open(filename) as f:
chars = f.read()
fileencoding = f.encoding
eol_convention = f.newlines
converted = False
except (UnicodeDecodeError, SyntaxError):
# Wait for the editor window to appear
self.editwin.text.update()
enc = askstring(
"Specify file encoding",
"The file's encoding is invalid for Python 3.x.\n"
"IDLE will convert it to UTF-8.\n"
"What is the current encoding of the file?",
initialvalue='utf-8',
parent=self.editwin.text)
with open(filename, encoding=enc) as f:
chars = f.read()
fileencoding = f.encoding
eol_convention = f.newlines
converted = True
except OSError as err:
messagebox.showerror("I/O Error", str(err), parent=self.text)
return False
except UnicodeDecodeError:
messagebox.showerror("Decoding Error",
"File %s\nFailed to Decode" % filename,
parent=self.text)
return False
if not isinstance(eol_convention, str):
# If the file does not contain line separators, it is None.
# If the file contains mixed line separators, it is a tuple.
if eol_convention is not None:
messagebox.showwarning("Mixed Newlines",
"Mixed newlines detected.\n"
"The file will be changed on save.",
parent=self.text)
converted = True
eol_convention = os.linesep # default
self.text.delete("1.0", "end")
self.set_filename(None)
self.fileencoding = fileencoding
self.eol_convention = eol_convention
self.text.insert("1.0", chars)
self.reset_undo()
self.set_filename(filename)
if converted:
# We need to save the conversion results first
# before being able to execute the code
self.set_saved(False)
self.text.mark_set("insert", "1.0")
self.text.yview("insert")
self.updaterecentfileslist(filename)
return True
def maybesave(self):
if self.get_saved():
return "yes"
message = "Do you want to save %s before closing?" % (
self.filename or "this untitled document")
confirm = messagebox.askyesnocancel(
title="Save On Close",
message=message,
default=messagebox.YES,
parent=self.text)
if confirm:
reply = "yes"
self.save(None)
if not self.get_saved():
reply = "cancel"
elif confirm is None:
reply = "cancel"
else:
reply = "no"
self.text.focus_set()
return reply
def save(self, event):
if not self.filename:
self.save_as(event)
else:
if self.writefile(self.filename):
self.set_saved(True)
try:
self.editwin.store_file_breaks()
except AttributeError: # may be a PyShell
pass
self.text.focus_set()
return "break"
def save_as(self, event):
filename = self.asksavefile()
if filename:
if self.writefile(filename):
self.set_filename(filename)
self.set_saved(1)
try:
self.editwin.store_file_breaks()
except AttributeError:
pass
self.text.focus_set()
self.updaterecentfileslist(filename)
return "break"
def save_a_copy(self, event):
filename = self.asksavefile()
if filename:
self.writefile(filename)
self.text.focus_set()
self.updaterecentfileslist(filename)
return "break"
def writefile(self, filename):
text = self.fixnewlines()
chars = self.encode(text)
try:
with open(filename, "wb") as f:
f.write(chars)
f.flush()
os.fsync(f.fileno())
return True
except OSError as msg:
messagebox.showerror("I/O Error", str(msg),
parent=self.text)
return False
def fixnewlines(self):
"Return text with final \n if needed and os eols."
if (self.text.get("end-2c") != '\n'
and not hasattr(self.editwin, "interp")): # Not shell.
self.text.insert("end-1c", "\n")
text = self.text.get("1.0", "end-1c")
if self.eol_convention != "\n":
text = text.replace("\n", self.eol_convention)
return text
def encode(self, chars):
if isinstance(chars, bytes):
# This is either plain ASCII, or Tk was returning mixed-encoding
# text to us. Don't try to guess further.
return chars
# Preserve a BOM that might have been present on opening
if self.fileencoding == 'utf-8-sig':
return chars.encode('utf-8-sig')
# See whether there is anything non-ASCII in it.
# If not, no need to figure out the encoding.
try:
return chars.encode('ascii')
except UnicodeEncodeError:
pass
# Check if there is an encoding declared
try:
encoded = chars.encode('ascii', 'replace')
enc, _ = tokenize.detect_encoding(io.BytesIO(encoded).readline)
return chars.encode(enc)
except SyntaxError as err:
failed = str(err)
except UnicodeEncodeError:
failed = "Invalid encoding '%s'" % enc
messagebox.showerror(
"I/O Error",
"%s.\nSaving as UTF-8" % failed,
parent=self.text)
# Fallback: save as UTF-8, with BOM - ignoring the incorrect
# declared encoding
return chars.encode('utf-8-sig')
def print_window(self, event):
confirm = messagebox.askokcancel(
title="Print",
message="Print to Default Printer",
default=messagebox.OK,
parent=self.text)
if not confirm:
self.text.focus_set()
return "break"
tempfilename = None
saved = self.get_saved()
if saved:
filename = self.filename
# shell undo is reset after every prompt, looks saved, probably isn't
if not saved or filename is None:
(tfd, tempfilename) = tempfile.mkstemp(prefix='IDLE_tmp_')
filename = tempfilename
os.close(tfd)
if not self.writefile(tempfilename):
os.unlink(tempfilename)
return "break"
platform = os.name
printPlatform = True
if platform == 'posix': #posix platform
command = idleConf.GetOption('main','General',
'print-command-posix')
command = command + " 2>&1"
elif platform == 'nt': #win32 platform
command = idleConf.GetOption('main','General','print-command-win')
else: #no printing for this platform
printPlatform = False
if printPlatform: #we can try to print for this platform
command = command % shlex.quote(filename)
pipe = os.popen(command, "r")
# things can get ugly on NT if there is no printer available.
output = pipe.read().strip()
status = pipe.close()
if status:
output = "Printing failed (exit status 0x%x)\n" % \
status + output
if output:
output = "Printing command: %s\n" % repr(command) + output
messagebox.showerror("Print status", output, parent=self.text)
else: #no printing for this platform
message = "Printing is not enabled for this platform: %s" % platform
messagebox.showinfo("Print status", message, parent=self.text)
if tempfilename:
os.unlink(tempfilename)
return "break"
opendialog = None
savedialog = None
filetypes = (
("Python files", py_extensions, "TEXT"),
("Text files", "*.txt", "TEXT"),
("All files", "*"),
)
defaultextension = '.py' if sys.platform == 'darwin' else ''
def askopenfile(self):
dir, base = self.defaultfilename("open")
if not self.opendialog:
self.opendialog = filedialog.Open(parent=self.text,
filetypes=self.filetypes)
filename = self.opendialog.show(initialdir=dir, initialfile=base)
return filename
def defaultfilename(self, mode="open"):
if self.filename:
return os.path.split(self.filename)
elif self.dirname:
return self.dirname, ""
else:
try:
pwd = os.getcwd()
except OSError:
pwd = ""
return pwd, ""
def asksavefile(self):
dir, base = self.defaultfilename("save")
if not self.savedialog:
self.savedialog = filedialog.SaveAs(
parent=self.text,
filetypes=self.filetypes,
defaultextension=self.defaultextension)
filename = self.savedialog.show(initialdir=dir, initialfile=base)
return filename
def updaterecentfileslist(self,filename):
"Update recent file list on all editor windows"
if self.editwin.flist:
self.editwin.update_recent_files_list(filename)
def _io_binding(parent): # htest #
from tkinter import Toplevel, Text
root = Toplevel(parent)
root.title("Test IOBinding")
x, y = map(int, parent.geometry().split('+')[1:])
root.geometry("+%d+%d" % (x, y + 175))
class MyEditWin:
def __init__(self, text):
self.text = text
self.flist = None
self.text.bind("<Control-o>", self.open)
self.text.bind('<Control-p>', self.print)
self.text.bind("<Control-s>", self.save)
self.text.bind("<Alt-s>", self.saveas)
self.text.bind('<Control-c>', self.savecopy)
def get_saved(self): return 0
def set_saved(self, flag): pass
def reset_undo(self): pass
def open(self, event):
self.text.event_generate("<<open-window-from-file>>")
def print(self, event):
self.text.event_generate("<<print-window>>")
def save(self, event):
self.text.event_generate("<<save-window>>")
def saveas(self, event):
self.text.event_generate("<<save-window-as-file>>")
def savecopy(self, event):
self.text.event_generate("<<save-copy-of-window-as-file>>")
text = Text(root)
text.pack()
text.focus_set()
editwin = MyEditWin(text)
IOBinding(editwin)
if __name__ == "__main__":
from unittest import main
main('idlelib.idle_test.test_iomenu', verbosity=2, exit=False)
from idlelib.idle_test.htest import run
run(_io_binding)