mirror of https://github.com/python/cpython
554 lines
19 KiB
Python
554 lines
19 KiB
Python
import os
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import types
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import sys
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import codecs
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import tempfile
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import tkinter.filedialog as tkFileDialog
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import tkinter.messagebox as tkMessageBox
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import re
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from tkinter import *
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from tkinter.simpledialog import askstring
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from idlelib.configHandler import idleConf
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from codecs import BOM_UTF8
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# Try setting the locale, so that we can find out
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# what encoding to use
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try:
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import locale
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locale.setlocale(locale.LC_CTYPE, "")
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except (ImportError, locale.Error):
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pass
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# Encoding for file names
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filesystemencoding = sys.getfilesystemencoding() ### currently unused
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locale_encoding = 'ascii'
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if sys.platform == 'win32':
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# On Windows, we could use "mbcs". However, to give the user
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# a portable encoding name, we need to find the code page
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try:
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locale_encoding = locale.getdefaultlocale()[1]
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codecs.lookup(locale_encoding)
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except LookupError:
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pass
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else:
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try:
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# Different things can fail here: the locale module may not be
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# loaded, it may not offer nl_langinfo, or CODESET, or the
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# resulting codeset may be unknown to Python. We ignore all
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# these problems, falling back to ASCII
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locale_encoding = locale.nl_langinfo(locale.CODESET)
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if locale_encoding is None or locale_encoding is '':
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# situation occurs on Mac OS X
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locale_encoding = 'ascii'
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codecs.lookup(locale_encoding)
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except (NameError, AttributeError, LookupError):
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# Try getdefaultlocale: it parses environment variables,
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# which may give a clue. Unfortunately, getdefaultlocale has
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# bugs that can cause ValueError.
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try:
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locale_encoding = locale.getdefaultlocale()[1]
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if locale_encoding is None or locale_encoding is '':
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# situation occurs on Mac OS X
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locale_encoding = 'ascii'
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codecs.lookup(locale_encoding)
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except (ValueError, LookupError):
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pass
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locale_encoding = locale_encoding.lower()
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encoding = locale_encoding ### KBK 07Sep07 This is used all over IDLE, check!
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### 'encoding' is used below in encode(), check!
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coding_re = re.compile("coding[:=]\s*([-\w_.]+)")
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def coding_spec(data):
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"""Return the encoding declaration according to PEP 263.
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When checking encoded data, only the first two lines should be passed
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in to avoid a UnicodeDecodeError if the rest of the data is not unicode.
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The first two lines would contain the encoding specification.
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Raise a LookupError if the encoding is declared but unknown.
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"""
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if isinstance(data, bytes):
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# This encoding might be wrong. However, the coding
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# spec must be ASCII-only, so any non-ASCII characters
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# around here will be ignored. Decoding to Latin-1 should
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# never fail (except for memory outage)
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lines = data.decode('iso-8859-1')
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else:
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lines = data
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# consider only the first two lines
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if '\n' in lines:
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lst = lines.split('\n')[:2]
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elif '\r' in lines:
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lst = lines.split('\r')[:2]
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else:
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lst = list(lines)
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str = '\n'.join(lst)
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match = coding_re.search(str)
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if not match:
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return None
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name = match.group(1)
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try:
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codecs.lookup(name)
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except LookupError:
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# The standard encoding error does not indicate the encoding
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raise LookupError("Unknown encoding: "+name)
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return name
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class IOBinding:
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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 = None
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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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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 the current window has no filename and hasn't been
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# modified, we replace its contents (no loss). Otherwise
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# we open a new window. But we won't replace the
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# shell window (which has an interp(reter) attribute), which
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# gets set to "not modified" at every new prompt.
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# Also, make sure the current window has not been closed,
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# since it can be closed during the Open File dialog.
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try:
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interp = self.editwin.interp
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except AttributeError:
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interp = None
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if self.editwin and not self.filename and \
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self.get_saved() and not interp:
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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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#
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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 = r"(\r\n)|\n|\r" # \r\n (Windows), \n (UNIX), or \r (Mac)
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eol_re = re.compile(eol)
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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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# open the file in binary mode so that we can handle
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# end-of-line convention ourselves.
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f = open(filename,'rb')
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two_lines = f.readline() + f.readline()
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f.seek(0)
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bytes = f.read()
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f.close()
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except IOError as msg:
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tkMessageBox.showerror("I/O Error", str(msg), master=self.text)
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return False
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chars, converted = self._decode(two_lines, bytes)
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if chars is None:
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tkMessageBox.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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# We now convert all end-of-lines to '\n's
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firsteol = self.eol_re.search(chars)
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if firsteol:
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self.eol_convention = firsteol.group(0)
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chars = self.eol_re.sub(r"\n", chars)
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self.text.delete("1.0", "end")
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self.set_filename(None)
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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 _decode(self, two_lines, bytes):
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"Create a Unicode string."
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chars = None
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# Check presence of a UTF-8 signature first
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if bytes.startswith(BOM_UTF8):
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try:
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chars = bytes[3:].decode("utf-8")
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except UnicodeDecodeError:
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# has UTF-8 signature, but fails to decode...
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return None, False
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else:
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# Indicates that this file originally had a BOM
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self.fileencoding = 'BOM'
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return chars, False
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# Next look for coding specification
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try:
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enc = coding_spec(two_lines)
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except LookupError as name:
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tkMessageBox.showerror(
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title="Error loading the file",
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message="The encoding '%s' is not known to this Python "\
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"installation. The file may not display correctly" % name,
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master = self.text)
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enc = None
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except UnicodeDecodeError:
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return None, False
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if enc:
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try:
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chars = str(bytes, enc)
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self.fileencoding = enc
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return chars, False
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except UnicodeDecodeError:
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pass
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# Try ascii:
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try:
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chars = str(bytes, 'ascii')
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self.fileencoding = None
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return chars, False
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except UnicodeDecodeError:
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pass
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# Try utf-8:
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try:
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chars = str(bytes, 'utf-8')
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self.fileencoding = 'utf-8'
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return chars, False
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except UnicodeDecodeError:
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pass
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# Finally, try the locale's encoding. This is deprecated;
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# the user should declare a non-ASCII encoding
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try:
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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 = locale_encoding,
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parent = self.editwin.text)
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if enc:
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chars = str(bytes, enc)
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self.fileencoding = None
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return chars, True
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except (UnicodeDecodeError, LookupError):
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pass
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return None, False # None on failure
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def maybesave(self):
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if self.get_saved():
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return "yes"
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message = "Do you want to save %s before closing?" % (
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self.filename or "this untitled document")
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confirm = tkMessageBox.askyesnocancel(
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title="Save On Close",
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message=message,
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default=tkMessageBox.YES,
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master=self.text)
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if confirm:
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reply = "yes"
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self.save(None)
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if not self.get_saved():
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reply = "cancel"
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elif confirm is None:
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reply = "cancel"
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else:
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reply = "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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self.fixlastline()
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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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chars = self.encode(text)
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try:
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f = open(filename, "wb")
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f.write(chars)
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f.flush()
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f.close()
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return True
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except IOError as msg:
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tkMessageBox.showerror("I/O Error", str(msg),
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master=self.text)
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return False
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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 == 'BOM':
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return BOM_UTF8 + chars.encode("utf-8")
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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 UnicodeError:
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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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# a string, let coding_spec slice it to the first two lines
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enc = coding_spec(chars)
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failed = None
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except LookupError as msg:
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failed = msg
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enc = None
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else:
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if not enc:
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# PEP 3120: default source encoding is UTF-8
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enc = 'utf-8'
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if enc:
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try:
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return chars.encode(enc)
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except UnicodeError:
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failed = "Invalid encoding '%s'" % enc
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tkMessageBox.showerror(
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"I/O Error",
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"%s.\nSaving as UTF-8" % failed,
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master = 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 BOM_UTF8 + chars.encode("utf-8")
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def fixlastline(self):
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c = self.text.get("end-2c")
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if c != '\n':
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self.text.insert("end-1c", "\n")
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def print_window(self, event):
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confirm = tkMessageBox.askokcancel(
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title="Print",
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message="Print to Default Printer",
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default=tkMessageBox.OK,
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master=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 % 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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tkMessageBox.showerror("Print status", output, master=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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tkMessageBox.showinfo("Print status", message, master=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 *.pyw", "TEXT"),
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("Text files", "*.txt", "TEXT"),
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("All files", "*"),
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]
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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 = tkFileDialog.Open(master=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 os.error:
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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 = tkFileDialog.SaveAs(master=self.text,
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filetypes=self.filetypes)
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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 test():
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root = Tk()
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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-s>", self.save)
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self.text.bind("<Alt-s>", self.save_as)
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|
self.text.bind("<Alt-z>", self.save_a_copy)
|
|
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 save(self, event):
|
|
self.text.event_generate("<<save-window>>")
|
|
def save_as(self, event):
|
|
self.text.event_generate("<<save-window-as-file>>")
|
|
def save_a_copy(self, event):
|
|
self.text.event_generate("<<save-copy-of-window-as-file>>")
|
|
text = Text(root)
|
|
text.pack()
|
|
text.focus_set()
|
|
editwin = MyEditWin(text)
|
|
io = IOBinding(editwin)
|
|
root.mainloop()
|
|
|
|
if __name__ == "__main__":
|
|
test()
|