Edit: IOBinding.py
import codecs from codecs import BOM_UTF8 import os import re import shlex import sys import tempfile import tkinter.filedialog as tkFileDialog import tkinter.messagebox as tkMessageBox from tkinter.simpledialog import askstring import idlelib from idlelib.configHandler import idleConf if idlelib.testing: # Set True by test.test_idle to avoid setlocale. encoding = 'utf-8' else: # Try setting the locale, so that we can find out # what encoding to use try: import locale locale.setlocale(locale.LC_CTYPE, "") except (ImportError, locale.Error): pass locale_decode = 'ascii' if sys.platform == 'win32': # On Windows, we could use "mbcs". However, to give the user # a portable encoding name, we need to find the code page try: locale_encoding = locale.getdefaultlocale()[1] codecs.lookup(locale_encoding) except LookupError: pass else: try: # Different things can fail here: the locale module may not be # loaded, it may not offer nl_langinfo, or CODESET, or the # resulting codeset may be unknown to Python. We ignore all # these problems, falling back to ASCII locale_encoding = locale.nl_langinfo(locale.CODESET) if locale_encoding is None or locale_encoding is '': # situation occurs on Mac OS X locale_encoding = 'ascii' codecs.lookup(locale_encoding) except (NameError, AttributeError, LookupError): # Try getdefaultlocale: it parses environment variables, # which may give a clue. Unfortunately, getdefaultlocale has # bugs that can cause ValueError. try: locale_encoding = locale.getdefaultlocale()[1] if locale_encoding is None or locale_encoding is '': # situation occurs on Mac OS X locale_encoding = 'ascii' codecs.lookup(locale_encoding) except (ValueError, LookupError): pass locale_encoding = locale_encoding.lower() encoding = locale_encoding # Encoding is used in multiple files; locale_encoding nowhere. # The only use of 'encoding' below is in _decode as initial value # of deprecated block asking user for encoding. # Perhaps use elsewhere should be reviewed. coding_re = re.compile(r'^[ \t\f]*#.*?coding[:=][ \t]*([-\w.]+)', re.ASCII) blank_re = re.compile(r'^[ \t\f]*(?:[#\r\n]|$)', re.ASCII) def coding_spec(data): """Return the encoding declaration according to PEP 263. When checking encoded data, only the first two lines should be passed in to avoid a UnicodeDecodeError if the rest of the data is not unicode. The first two lines would contain the encoding specification. Raise a LookupError if the encoding is declared but unknown. """ if isinstance(data, bytes): # This encoding might be wrong. However, the coding # spec must be ASCII-only, so any non-ASCII characters # around here will be ignored. Decoding to Latin-1 should # never fail (except for memory outage) lines = data.decode('iso-8859-1') else: lines = data # consider only the first two lines if '\n' in lines: lst = lines.split('\n', 2)[:2] elif '\r' in lines: lst = lines.split('\r', 2)[:2] else: lst = [lines] for line in lst: match = coding_re.match(line) if match is not None: break if not blank_re.match(line): return None else: return None name = match.group(1) try: codecs.lookup(name) except LookupError: # The standard encoding error does not indicate the encoding raise LookupError("Unknown encoding: "+name) return name class IOBinding: def __init__(self, editwin): self.editwin = editwin self.text = editwin.text self.__id_open = self.text.bind("<<open-window-from-file>>", self.open) self.__id_save = self.text.bind("<<save-window>>", self.save) self.__id_saveas = self.text.bind("<<save-window-as-file>>", self.save_as) self.__id_savecopy = self.text.bind("<<save-copy-of-window-as-file>>", self.save_a_copy) self.fileencoding = None self.__id_print = self.text.bind("<<print-window>>", self.print_window) def close(self): # Undo command bindings self.text.unbind("<<open-window-from-file>>", self.__id_open) self.text.unbind("<<save-window>>", self.__id_save) self.text.unbind("<<save-window-as-file>>",self.__id_saveas) self.text.unbind("<<save-copy-of-window-as-file>>", self.__id_savecopy) self.text.unbind("<<print-window>>", self.__id_print) # Break cycles self.editwin = None self.text = None self.filename_change_hook = None def get_saved(self): return self.editwin.get_saved() def set_saved(self, flag): self.editwin.set_saved(flag) def reset_undo(self): self.editwin.reset_undo() filename_change_hook = None def set_filename_change_hook(self, hook): self.filename_change_hook = hook filename = None dirname = None def set_filename(self, filename): if filename and os.path.isdir(filename): self.filename = None self.dirname = filename else: self.filename = filename self.dirname = None self.set_saved(1) if self.filename_change_hook: self.filename_change_hook() def open(self, event=None, editFile=None): flist = self.editwin.flist # Save in case parent window is closed (ie, during askopenfile()). if flist: if not editFile: filename = self.askopenfile() else: filename=editFile if filename: # If editFile is valid and already open, flist.open will # shift focus to its existing window. # If the current window exists and is a fresh unnamed, # unmodified editor window (not an interpreter shell), # pass self.loadfile to flist.open so it will load the file # in the current window (if the file is not already open) # instead of a new window. if (self.editwin and not getattr(self.editwin, 'interp', None) and not self.filename and self.get_saved()): flist.open(filename, self.loadfile) else: flist.open(filename) else: if self.text: self.text.focus_set() return "break" # Code for use outside IDLE: if self.get_saved(): reply = self.maybesave() if reply == "cancel": self.text.focus_set() return "break" if not editFile: filename = self.askopenfile() else: filename=editFile if filename: self.loadfile(filename) else: self.text.focus_set() return "break" eol = r"(\r\n)|\n|\r" # \r\n (Windows), \n (UNIX), or \r (Mac) eol_re = re.compile(eol) eol_convention = os.linesep # default def loadfile(self, filename): try: # open the file in binary mode so that we can handle # end-of-line convention ourselves. with open(filename, 'rb') as f: two_lines = f.readline() + f.readline() f.seek(0) bytes = f.read() except OSError as msg: tkMessageBox.showerror("I/O Error", str(msg), parent=self.text) return False chars, converted = self._decode(two_lines, bytes) if chars is None: tkMessageBox.showerror("Decoding Error", "File %s\nFailed to Decode" % filename, parent=self.text) return False # We now convert all end-of-lines to '\n's firsteol = self.eol_re.search(chars) if firsteol: self.eol_convention = firsteol.group(0) chars = self.eol_re.sub(r"\n", chars) self.text.delete("1.0", "end") self.set_filename(None) self.text.insert("1.0", chars) self.reset_undo() self.set_filename(filename) if converted: # We need to save the conversion results first # before being able to execute the code self.set_saved(False) self.text.mark_set("insert", "1.0") self.text.yview("insert") self.updaterecentfileslist(filename) return True def _decode(self, two_lines, bytes): "Create a Unicode string." chars = None # Check presence of a UTF-8 signature first if bytes.startswith(BOM_UTF8): try: chars = bytes[3:].decode("utf-8") except UnicodeDecodeError: # has UTF-8 signature, but fails to decode... return None, False else: # Indicates that this file originally had a BOM self.fileencoding = 'BOM' return chars, False # Next look for coding specification try: enc = coding_spec(two_lines) except LookupError as name: tkMessageBox.showerror( title="Error loading the file", message="The encoding '%s' is not known to this Python "\ "installation. The file may not display correctly" % name, parent = self.text) enc = None except UnicodeDecodeError: return None, False if enc: try: chars = str(bytes, enc) self.fileencoding = enc return chars, False except UnicodeDecodeError: pass # Try ascii: try: chars = str(bytes, 'ascii') self.fileencoding = None return chars, False except UnicodeDecodeError: pass # Try utf-8: try: chars = str(bytes, 'utf-8') self.fileencoding = 'utf-8' return chars, False except UnicodeDecodeError: pass # Finally, try the locale's encoding. This is deprecated; # the user should declare a non-ASCII encoding try: # Wait for the editor window to appear self.editwin.text.update() enc = askstring( "Specify file encoding", "The file's encoding is invalid for Python 3.x.\n" "IDLE will convert it to UTF-8.\n" "What is the current encoding of the file?", initialvalue = encoding, parent = self.editwin.text) if enc: chars = str(bytes, enc) self.fileencoding = None return chars, True except (UnicodeDecodeError, LookupError): pass return None, False # None on failure def maybesave(self): if self.get_saved(): return "yes" message = "Do you want to save %s before closing?" % ( self.filename or "this untitled document") confirm = tkMessageBox.askyesnocancel( title="Save On Close", message=message, default=tkMessageBox.YES, parent=self.text) if confirm: reply = "yes" self.save(None) if not self.get_saved(): reply = "cancel" elif confirm is None: reply = "cancel" else: reply = "no" self.text.focus_set() return reply def save(self, event): if not self.filename: self.save_as(event) else: if self.writefile(self.filename): self.set_saved(True) try: self.editwin.store_file_breaks() except AttributeError: # may be a PyShell pass self.text.focus_set() return "break" def save_as(self, event): filename = self.asksavefile() if filename: if self.writefile(filename): self.set_filename(filename) self.set_saved(1) try: self.editwin.store_file_breaks() except AttributeError: pass self.text.focus_set() self.updaterecentfileslist(filename) return "break" def save_a_copy(self, event): filename = self.asksavefile() if filename: self.writefile(filename) self.text.focus_set() self.updaterecentfileslist(filename) return "break" def writefile(self, filename): self.fixlastline() text = self.text.get("1.0", "end-1c") if self.eol_convention != "\n": text = text.replace("\n", self.eol_convention) chars = self.encode(text) try: with open(filename, "wb") as f: f.write(chars) return True except OSError as msg: tkMessageBox.showerror("I/O Error", str(msg), parent=self.text) return False def encode(self, chars): if isinstance(chars, bytes): # This is either plain ASCII, or Tk was returning mixed-encoding # text to us. Don't try to guess further. return chars # Preserve a BOM that might have been present on opening if self.fileencoding == 'BOM': return BOM_UTF8 + chars.encode("utf-8") # See whether there is anything non-ASCII in it. # If not, no need to figure out the encoding. try: return chars.encode('ascii') except UnicodeError: pass # Check if there is an encoding declared try: # a string, let coding_spec slice it to the first two lines enc = coding_spec(chars) failed = None except LookupError as msg: failed = msg enc = None else: if not enc: # PEP 3120: default source encoding is UTF-8 enc = 'utf-8' if enc: try: return chars.encode(enc) except UnicodeError: failed = "Invalid encoding '%s'" % enc tkMessageBox.showerror( "I/O Error", "%s.\nSaving as UTF-8" % failed, parent = self.text) # Fallback: save as UTF-8, with BOM - ignoring the incorrect # declared encoding return BOM_UTF8 + chars.encode("utf-8") def fixlastline(self): c = self.text.get("end-2c") if c != '\n': self.text.insert("end-1c", "\n") def print_window(self, event): confirm = tkMessageBox.askokcancel( title="Print", message="Print to Default Printer", default=tkMessageBox.OK, parent=self.text) if not confirm: self.text.focus_set() return "break" tempfilename = None saved = self.get_saved() if saved: filename = self.filename # shell undo is reset after every prompt, looks saved, probably isn't if not saved or filename is None: (tfd, tempfilename) = tempfile.mkstemp(prefix='IDLE_tmp_') filename = tempfilename os.close(tfd) if not self.writefile(tempfilename): os.unlink(tempfilename) return "break" platform = os.name printPlatform = True if platform == 'posix': #posix platform command = idleConf.GetOption('main','General', 'print-command-posix') command = command + " 2>&1" elif platform == 'nt': #win32 platform command = idleConf.GetOption('main','General','print-command-win') else: #no printing for this platform printPlatform = False if printPlatform: #we can try to print for this platform command = command % shlex.quote(filename) pipe = os.popen(command, "r") # things can get ugly on NT if there is no printer available. output = pipe.read().strip() status = pipe.close() if status: output = "Printing failed (exit status 0x%x)\n" % \ status + output if output: output = "Printing command: %s\n" % repr(command) + output tkMessageBox.showerror("Print status", output, parent=self.text) else: #no printing for this platform message = "Printing is not enabled for this platform: %s" % platform tkMessageBox.showinfo("Print status", message, parent=self.text) if tempfilename: os.unlink(tempfilename) return "break" opendialog = None savedialog = None filetypes = [ ("Python files", "*.py *.pyw", "TEXT"), ("Text files", "*.txt", "TEXT"), ("All files", "*"), ] defaultextension = '.py' if sys.platform == 'darwin' else '' def askopenfile(self): dir, base = self.defaultfilename("open") if not self.opendialog: self.opendialog = tkFileDialog.Open(parent=self.text, filetypes=self.filetypes) filename = self.opendialog.show(initialdir=dir, initialfile=base) return filename def defaultfilename(self, mode="open"): if self.filename: return os.path.split(self.filename) elif self.dirname: return self.dirname, "" else: try: pwd = os.getcwd() except OSError: pwd = "" return pwd, "" def asksavefile(self): dir, base = self.defaultfilename("save") if not self.savedialog: self.savedialog = tkFileDialog.SaveAs( parent=self.text, filetypes=self.filetypes, defaultextension=self.defaultextension) filename = self.savedialog.show(initialdir=dir, initialfile=base) return filename def updaterecentfileslist(self,filename): "Update recent file list on all editor windows" if self.editwin.flist: self.editwin.update_recent_files_list(filename) def _io_binding(parent): # htest # from tkinter import Toplevel, Text root = Toplevel(parent) root.title("Test IOBinding") width, height, x, y = list(map(int, re.split('[x+]', parent.geometry()))) root.geometry("+%d+%d"%(x, y + 150)) class MyEditWin: def __init__(self, text): self.text = text self.flist = None self.text.bind("<Control-o>", self.open) self.text.bind('<Control-p>', self.print) self.text.bind("<Control-s>", self.save) self.text.bind("<Alt-s>", self.saveas) self.text.bind('<Control-c>', self.savecopy) def get_saved(self): return 0 def set_saved(self, flag): pass def reset_undo(self): pass def open(self, event): self.text.event_generate("<<open-window-from-file>>") def print(self, event): self.text.event_generate("<<print-window>>") def save(self, event): self.text.event_generate("<<save-window>>") def saveas(self, event): self.text.event_generate("<<save-window-as-file>>") def savecopy(self, event): self.text.event_generate("<<save-copy-of-window-as-file>>") text = Text(root) text.pack() text.focus_set() editwin = MyEditWin(text) IOBinding(editwin) if __name__ == "__main__": import unittest unittest.main('idlelib.idle_test.test_iomenu', verbosity=2, exit=False) from idlelib.idle_test.htest import run run(_io_binding)
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