mirror of https://github.com/python/cpython
450 lines
14 KiB
Python
450 lines
14 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 re
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import tempfile
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import tkFileDialog
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import tkMessageBox
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from IdleConf import idleconf
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#$ event <<open-window-from-file>>
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#$ win <Control-o>
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#$ unix <Control-x><Control-f>
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#$ event <<save-window>>
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#$ win <Control-s>
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#$ unix <Control-x><Control-s>
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#$ event <<save-window-as-file>>
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#$ win <Alt-s>
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#$ unix <Control-x><Control-w>
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#$ event <<save-copy-of-window-as-file>>
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#$ win <Alt-Shift-s>
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#$ unix <Control-x><w>
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#$ event <<print-window>>
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#$ win <Control-p>
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#$ unix <Control-x><Control-p>
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try:
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from codecs import BOM_UTF8
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except ImportError:
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# only available since Python 2.3
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BOM_UTF8 = '\xef\xbb\xbf'
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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:
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pass
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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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encoding = locale.getdefaultlocale()[1]
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codecs.lookup(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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encoding = locale.nl_langinfo(locale.CODESET)
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codecs.lookup(encoding)
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except (NameError, AttributeError, LookupError):
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# Try getdefaultlocale well: 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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encoding = locale.getdefaultlocale()[1]
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codecs.lookup(encoding)
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except (ValueError, LookupError):
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pass
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encoding = encoding.lower()
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coding_re = re.compile("coding[:=]\s*([-\w_.]+)")
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def coding_spec(str):
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"""Return the encoding declaration according to PEP 263.
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Raise LookupError if the encoding is declared but unknown."""
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# Only consider the first two lines
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str = str.split("\n")[:2]
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str = "\n".join(str)
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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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# Check whether the encoding is known
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import codecs
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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.__id_print = self.text.bind("<<print-window>>", self.print_window)
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self.fileencoding = None
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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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def set_filename(self, filename):
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self.filename = filename
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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):
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if self.editwin.flist:
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filename = self.askopenfile()
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if filename:
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self.editwin.flist.open(filename)
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else:
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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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filename = self.askopenfile()
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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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def loadfile(self, filename):
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try:
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f = open(filename)
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chars = f.read()
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f.close()
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except IOError, 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 = self.decode(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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self.text.mark_set("insert", "1.0")
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self.text.see("insert")
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return True
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def decode(self, chars):
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# Try to create a Unicode string. If that fails, let Tcl try
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# its best
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# Check presence of a UTF-8 signature first
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if chars.startswith(BOM_UTF8):
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try:
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chars = chars[3:].decode("utf-8")
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except UnicodeError:
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# has UTF-8 signature, but fails to decode...
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return chars
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else:
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# Indicates that this file originally had a BOM
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self.fileencoding = BOM_UTF8
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return chars
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# Next look for coding specification
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try:
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enc = coding_spec(chars)
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except LookupError, 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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if enc:
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try:
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return unicode(chars, enc)
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except UnicodeError:
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pass
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# If it is ASCII, we need not to record anything
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try:
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return unicode(chars, 'ascii')
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except UnicodeError:
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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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chars = unicode(chars, encoding)
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self.fileencoding = encoding
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except UnicodeError:
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pass
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return chars
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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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m = tkMessageBox.Message(
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title="Save On Close",
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message=message,
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icon=tkMessageBox.QUESTION,
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type=tkMessageBox.YESNOCANCEL,
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master=self.text)
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reply = m.show()
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if 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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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(1)
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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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self.text.focus_set()
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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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return "break"
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def print_window(self, event):
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tempfilename = None
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if self.get_saved():
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filename = self.filename
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else:
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(tfd, tfn) = tempfile.mkstemp()
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os.close(tfd)
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filename = tfn
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if not self.writefile(filename):
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os.unlink(tfn)
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return "break"
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edconf = idleconf.getsection('EditorWindow')
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command = edconf.get('print-command')
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command = command % filename
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if os.name == 'posix':
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command = command + " 2>&1"
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pipe = os.popen(command, "r")
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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" % 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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return "break"
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def writefile(self, filename):
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self.fixlastline()
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chars = self.encode(self.text.get("1.0", "end-1c"))
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try:
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f = open(filename, "w")
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f.write(chars)
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f.close()
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## print "saved to", `filename`
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return True
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except IOError, 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, types.StringType):
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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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# 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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# If there is an encoding declared, try this first.
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try:
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enc = coding_spec(chars)
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failed = None
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except LookupError, msg:
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failed = msg
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enc = None
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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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if failed:
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tkMessageBox.showerror(
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"I/O Error",
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"%s. Saving as UTF-8" % failed,
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master = self.text)
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# If there was a UTF-8 signature, use that. This should not fail
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if self.fileencoding == BOM_UTF8 or failed:
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return BOM_UTF8 + chars.encode("utf-8")
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# Try the original file encoding next, if any
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if self.fileencoding:
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try:
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return chars.encode(self.fileencoding)
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except UnicodeError:
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tkMessageBox.showerror(
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"I/O Error",
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"Cannot save this as '%s' anymore. Saving as UTF-8" % self.fileencoding,
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master = self.text)
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return BOM_UTF8 + chars.encode("utf-8")
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# Nothing was declared, and we had not determined an encoding
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# on loading. Recommend an encoding line.
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try:
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chars = chars.encode(encoding)
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enc = encoding
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except UnicodeError:
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chars = BOM_UTF8 + chars.encode("utf-8")
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enc = "utf-8"
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tkMessageBox.showerror(
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"I/O Error",
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"Non-ASCII found, yet no encoding declared. Add a line like\n"
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"# -*- coding: %s -*- \nto your file" % enc,
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master = self.text)
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return chars
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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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opendialog = None
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savedialog = None
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filetypes = [
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("Python and text files", "*.py *.pyw *.txt", "TEXT"),
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("All text files", "*", "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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return self.opendialog.show(initialdir=dir, initialfile=base)
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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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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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return self.savedialog.show(initialdir=dir, initialfile=base)
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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)
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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 save(self, event):
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self.text.event_generate("<<save-window>>")
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def save_as(self, event):
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self.text.event_generate("<<save-window-as-file>>")
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def save_a_copy(self, event):
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self.text.event_generate("<<save-copy-of-window-as-file>>")
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text = Text(root)
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text.pack()
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text.focus_set()
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editwin = MyEditWin(text)
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io = IOBinding(editwin)
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root.mainloop()
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if __name__ == "__main__":
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from Tkinter import *
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test()
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