| import os |
| import types |
| import sys |
| import codecs |
| import tempfile |
| import tkinter.filedialog as tkFileDialog |
| import tkinter.messagebox as tkMessageBox |
| import re |
| from tkinter import * |
| from tkinter.simpledialog import askstring |
| |
| from idlelib.configHandler import idleConf |
| |
| from codecs import BOM_UTF8 |
| |
| # 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 |
| |
| # Encoding for file names |
| filesystemencoding = sys.getfilesystemencoding() ### currently unused |
| |
| locale_encoding = '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 ### KBK 07Sep07 This is used all over IDLE, check! |
| ### 'encoding' is used below in encode(), check! |
| |
| coding_re = re.compile("coding[:=]\s*([-\w_.]+)") |
| |
| 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] |
| elif '\r' in lines: |
| lst = lines.split('\r')[:2] |
| else: |
| lst = list(lines) |
| str = '\n'.join(lst) |
| match = coding_re.search(str) |
| if not match: |
| 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): |
| if self.editwin.flist: |
| if not editFile: |
| filename = self.askopenfile() |
| else: |
| filename=editFile |
| if filename: |
| # If the current window has no filename and hasn't been |
| # modified, we replace its contents (no loss). Otherwise |
| # we open a new window. But we won't replace the |
| # shell window (which has an interp(reter) attribute), which |
| # gets set to "not modified" at every new prompt. |
| try: |
| interp = self.editwin.interp |
| except AttributeError: |
| interp = None |
| if not self.filename and self.get_saved() and not interp: |
| self.editwin.flist.open(filename, self.loadfile) |
| else: |
| self.editwin.flist.open(filename) |
| else: |
| 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. |
| f = open(filename,'rb') |
| two_lines = f.readline() + f.readline() |
| f.seek(0) |
| bytes = f.read() |
| f.close() |
| except IOError as msg: |
| tkMessageBox.showerror("I/O Error", str(msg), master=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.see("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, |
| master = 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 = locale_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") |
| m = tkMessageBox.Message( |
| title="Save On Close", |
| message=message, |
| icon=tkMessageBox.QUESTION, |
| type=tkMessageBox.YESNOCANCEL, |
| master=self.text) |
| reply = m.show() |
| if reply == "yes": |
| self.save(None) |
| if not self.get_saved(): |
| reply = "cancel" |
| 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(1) |
| 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: |
| f = open(filename, "wb") |
| f.write(chars) |
| f.flush() |
| f.close() |
| return True |
| except IOError as msg: |
| tkMessageBox.showerror("I/O Error", str(msg), |
| master=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, |
| master = 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): |
| m = tkMessageBox.Message( |
| title="Print", |
| message="Print to Default Printer", |
| icon=tkMessageBox.QUESTION, |
| type=tkMessageBox.OKCANCEL, |
| default=tkMessageBox.OK, |
| master=self.text) |
| reply = m.show() |
| if reply != tkMessageBox.OK: |
| 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=1 |
| 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=0 |
| if printPlatform: #we can try to print for this platform |
| command = command % 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, master=self.text) |
| else: #no printing for this platform |
| message="Printing is not enabled for this platform: %s" % platform |
| tkMessageBox.showinfo("Print status", message, master=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", "*"), |
| ] |
| |
| def askopenfile(self): |
| dir, base = self.defaultfilename("open") |
| if not self.opendialog: |
| self.opendialog = tkFileDialog.Open(master=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 os.error: |
| pwd = "" |
| return pwd, "" |
| |
| def asksavefile(self): |
| dir, base = self.defaultfilename("save") |
| if not self.savedialog: |
| self.savedialog = tkFileDialog.SaveAs(master=self.text, |
| filetypes=self.filetypes) |
| 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 test(): |
| root = Tk() |
| class MyEditWin: |
| def __init__(self, text): |
| self.text = text |
| self.flist = None |
| self.text.bind("<Control-o>", self.open) |
| self.text.bind("<Control-s>", self.save) |
| self.text.bind("<Alt-s>", self.save_as) |
| 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() |