Merge Py Idle changes:
Rev 1.5 tim_one Convert a pile of obvious "yes/no" functions to return bool. Rev 1.6 gvanrossum (partially merged previously, move line outside try: block) Provisional fix for writefile() [SF bug # 541730]. The problem was that an exception can occur in the text.get() call or in the write() call, when the text buffer contains non-ASCII characters. This causes the previous contents of the file to be lost. The provisional fix is to call str(self.text.get(...)) *before* opening the file, so that if the exception occurs, we never open the file. Two orthogonal better solutions have to wait for policy decisions: 1. We could try to encode the data as Latin-1 or as UTF-8; but that would require IDLE to grow a notion of file encoding which requires more thought. 2. We could make backups before overwriting a file. This requires more thought because it needs to be fast and cross-platform and configurable. Rev 1.7 gvanrossum (previously merged with modifications by Stephen M. Gava) Add primitive printing support for Unix and Windows. Rev 1.8 loewis Patch #590913: PEP 263 support. Rev 1.9 gvanrossum (tempfile.py interface -- deferred) Rev 1.10 tim_one whitespace normalization Rev 1.11 nnorwitz (deferred pending 1.9 integration)
This commit is contained in:
Kurt B. Kaiser
parent
3c4dee4ca7
commit
01166da85a
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@ -6,6 +6,9 @@
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# which will only understand the local convention.
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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 tkFileDialog
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import tkMessageBox
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@ -32,6 +35,71 @@ from configHandler import idleConf
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#$ win <Alt-Shift-s>
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#$ unix <Control-x><w>
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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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@ -44,6 +112,7 @@ class IOBinding:
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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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@ -129,8 +198,9 @@ class IOBinding:
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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 0
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return False
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chars = self.decode(chars)
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# We now convert all end-of-lines to '\n's
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eol = r"(\r\n)|\n|\r" # \r\n (Windows), \n (UNIX), or \r (Mac)
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chars = re.compile( eol ).sub( r"\n", chars )
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@ -142,7 +212,55 @@ class IOBinding:
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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 1
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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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@ -190,18 +308,86 @@ class IOBinding:
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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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chars = str(self.text.get("1.0", "end-1c"))
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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 1
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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 0
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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" \
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% 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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def print_window(self, event):
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tempfilename = None
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if self.get_saved():
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@ -214,7 +400,8 @@ class IOBinding:
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platform=os.name
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printPlatform=1
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if platform == 'posix': #posix platform
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command = idleConf.GetOption('main','General','print-command-posix')
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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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@ -226,7 +413,8 @@ class IOBinding:
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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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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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@ -235,11 +423,6 @@ class IOBinding:
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tkMessageBox.showinfo("Print status", message, master=self.text)
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return "break"
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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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