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