| # changes by dscherer@cmu.edu |
| # - IOBinding.open() replaces the current window with the opened file, |
| # if the current window is both unmodified and unnamed |
| # - IOBinding.loadfile() interprets Windows, UNIX, and Macintosh |
| # end-of-line conventions, instead of relying on the standard library, |
| # which will only understand the local convention. |
| |
| import os |
| import types |
| import pipes |
| import sys |
| import codecs |
| import tempfile |
| import tkFileDialog |
| import tkMessageBox |
| import re |
| from Tkinter import * |
| from SimpleDialog import SimpleDialog |
| |
| from idlelib.configHandler import idleConf |
| |
| try: |
| from codecs import BOM_UTF8 |
| except ImportError: |
| # only available since Python 2.3 |
| BOM_UTF8 = '\xef\xbb\xbf' |
| |
| # 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() |
| |
| 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: |
| encoding = locale.getdefaultlocale()[1] |
| codecs.lookup(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 |
| encoding = locale.nl_langinfo(locale.CODESET) |
| if encoding is None or encoding is '': |
| # situation occurs on Mac OS X |
| encoding = 'ascii' |
| codecs.lookup(encoding) |
| except (NameError, AttributeError, LookupError): |
| # Try getdefaultlocale well: it parses environment variables, |
| # which may give a clue. Unfortunately, getdefaultlocale has |
| # bugs that can cause ValueError. |
| try: |
| encoding = locale.getdefaultlocale()[1] |
| if encoding is None or encoding is '': |
| # situation occurs on Mac OS X |
| encoding = 'ascii' |
| codecs.lookup(encoding) |
| except (ValueError, LookupError): |
| pass |
| |
| encoding = encoding.lower() |
| |
| coding_re = re.compile("coding[:=]\s*([-\w_.]+)") |
| |
| class EncodingMessage(SimpleDialog): |
| "Inform user that an encoding declaration is needed." |
| def __init__(self, master, enc): |
| self.should_edit = False |
| |
| self.root = top = Toplevel(master) |
| top.bind("<Return>", self.return_event) |
| top.bind("<Escape>", self.do_ok) |
| top.protocol("WM_DELETE_WINDOW", self.wm_delete_window) |
| top.wm_title("I/O Warning") |
| top.wm_iconname("I/O Warning") |
| self.top = top |
| |
| l1 = Label(top, |
| text="Non-ASCII found, yet no encoding declared. Add a line like") |
| l1.pack(side=TOP, anchor=W) |
| l2 = Entry(top, font="courier") |
| l2.insert(0, "# -*- coding: %s -*-" % enc) |
| # For some reason, the text is not selectable anymore if the |
| # widget is disabled. |
| # l2['state'] = DISABLED |
| l2.pack(side=TOP, anchor = W, fill=X) |
| l3 = Label(top, text="to your file\n" |
| "Choose OK to save this file as %s\n" |
| "Edit your general options to silence this warning" % enc) |
| l3.pack(side=TOP, anchor = W) |
| |
| buttons = Frame(top) |
| buttons.pack(side=TOP, fill=X) |
| # Both return and cancel mean the same thing: do nothing |
| self.default = self.cancel = 0 |
| b1 = Button(buttons, text="Ok", default="active", |
| command=self.do_ok) |
| b1.pack(side=LEFT, fill=BOTH, expand=1) |
| b2 = Button(buttons, text="Edit my file", |
| command=self.do_edit) |
| b2.pack(side=LEFT, fill=BOTH, expand=1) |
| |
| self._set_transient(master) |
| |
| def do_ok(self): |
| self.done(0) |
| |
| def do_edit(self): |
| self.done(1) |
| |
| def coding_spec(str): |
| """Return the encoding declaration according to PEP 263. |
| |
| Raise LookupError if the encoding is declared but unknown. |
| """ |
| # Only consider the first two lines |
| str = str.split("\n")[:2] |
| str = "\n".join(str) |
| |
| match = coding_re.search(str) |
| if not match: |
| return None |
| name = match.group(1) |
| # Check whether the encoding is known |
| import codecs |
| 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. |
| f = open(filename,'rb') |
| chars = f.read() |
| f.close() |
| except IOError, msg: |
| tkMessageBox.showerror("I/O Error", str(msg), master=self.text) |
| return False |
| |
| chars = self.decode(chars) |
| # We now convert all end-of-lines to '\n's |
| firsteol = self.eol_re.search(chars) |
| if firsteol: |
| self.eol_convention = firsteol.group(0) |
| if isinstance(self.eol_convention, unicode): |
| # Make sure it is an ASCII string |
| self.eol_convention = self.eol_convention.encode("ascii") |
| 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) |
| self.text.mark_set("insert", "1.0") |
| self.text.yview("insert") |
| self.updaterecentfileslist(filename) |
| return True |
| |
| def decode(self, chars): |
| """Create a Unicode string |
| |
| If that fails, let Tcl try its best |
| """ |
| # Check presence of a UTF-8 signature first |
| if chars.startswith(BOM_UTF8): |
| try: |
| chars = chars[3:].decode("utf-8") |
| except UnicodeError: |
| # has UTF-8 signature, but fails to decode... |
| return chars |
| else: |
| # Indicates that this file originally had a BOM |
| self.fileencoding = BOM_UTF8 |
| return chars |
| # Next look for coding specification |
| try: |
| enc = coding_spec(chars) |
| except LookupError, 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 |
| if enc: |
| try: |
| return unicode(chars, enc) |
| except UnicodeError: |
| pass |
| # If it is ASCII, we need not to record anything |
| try: |
| return unicode(chars, 'ascii') |
| except UnicodeError: |
| pass |
| # Finally, try the locale's encoding. This is deprecated; |
| # the user should declare a non-ASCII encoding |
| try: |
| chars = unicode(chars, encoding) |
| self.fileencoding = encoding |
| except UnicodeError: |
| pass |
| return chars |
| |
| 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, |
| master=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() |
| chars = self.encode(self.text.get("1.0", "end-1c")) |
| if self.eol_convention != "\n": |
| chars = chars.replace("\n", self.eol_convention) |
| try: |
| f = open(filename, "wb") |
| f.write(chars) |
| f.flush() |
| f.close() |
| return True |
| except IOError, msg: |
| tkMessageBox.showerror("I/O Error", str(msg), |
| master=self.text) |
| return False |
| |
| def encode(self, chars): |
| if isinstance(chars, types.StringType): |
| # This is either plain ASCII, or Tk was returning mixed-encoding |
| # text to us. Don't try to guess further. |
| return chars |
| # 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 |
| # If there is an encoding declared, try this first. |
| try: |
| enc = coding_spec(chars) |
| failed = None |
| except LookupError, msg: |
| failed = msg |
| enc = None |
| if enc: |
| try: |
| return chars.encode(enc) |
| except UnicodeError: |
| failed = "Invalid encoding '%s'" % enc |
| if failed: |
| tkMessageBox.showerror( |
| "I/O Error", |
| "%s. Saving as UTF-8" % failed, |
| master = self.text) |
| # If there was a UTF-8 signature, use that. This should not fail |
| if self.fileencoding == BOM_UTF8 or failed: |
| return BOM_UTF8 + chars.encode("utf-8") |
| # Try the original file encoding next, if any |
| if self.fileencoding: |
| try: |
| return chars.encode(self.fileencoding) |
| except UnicodeError: |
| tkMessageBox.showerror( |
| "I/O Error", |
| "Cannot save this as '%s' anymore. Saving as UTF-8" \ |
| % self.fileencoding, |
| master = self.text) |
| return BOM_UTF8 + chars.encode("utf-8") |
| # Nothing was declared, and we had not determined an encoding |
| # on loading. Recommend an encoding line. |
| config_encoding = idleConf.GetOption("main","EditorWindow", |
| "encoding") |
| if config_encoding == 'utf-8': |
| # User has requested that we save files as UTF-8 |
| return BOM_UTF8 + chars.encode("utf-8") |
| ask_user = True |
| try: |
| chars = chars.encode(encoding) |
| enc = encoding |
| if config_encoding == 'locale': |
| ask_user = False |
| except UnicodeError: |
| chars = BOM_UTF8 + chars.encode("utf-8") |
| enc = "utf-8" |
| if not ask_user: |
| return chars |
| dialog = EncodingMessage(self.editwin.top, enc) |
| dialog.go() |
| if dialog.num == 1: |
| # User asked us to edit the file |
| encline = "# -*- coding: %s -*-\n" % enc |
| firstline = self.text.get("1.0", "2.0") |
| if firstline.startswith("#!"): |
| # Insert encoding after #! line |
| self.text.insert("2.0", encline) |
| else: |
| self.text.insert("1.0", encline) |
| return self.encode(self.text.get("1.0", "end-1c")) |
| return chars |
| |
| 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, |
| master=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 % pipes.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, 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) |
| if isinstance(filename, unicode): |
| filename = filename.encode(filesystemencoding) |
| 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) |
| if isinstance(filename, unicode): |
| filename = filename.encode(filesystemencoding) |
| return filename |
| |
| def updaterecentfileslist(self,filename): |
| "Update recent file list on all editor windows" |
| 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() |
