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# 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 tkFileDialog
import tkMessageBox
import re
#$ event <<open-window-from-file>>
#$ win <Control-o>
#$ unix <Control-x><Control-f>
#$ event <<save-window>>
#$ win <Control-s>
#$ unix <Control-x><Control-s>
#$ event <<save-window-as-file>>
#$ win <Alt-s>
#$ unix <Control-x><Control-w>
#$ event <<save-copy-of-window-as-file>>
#$ win <Alt-Shift-s>
#$ unix <Control-x><w>
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)
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)
# 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
def set_filename(self, filename):
self.filename = filename
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 it's contents (no loss). Otherwise
# we open a new window.
if not self.filename and self.get_saved():
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"
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 0
# We now convert all end-of-lines to '\n's
eol = r"(\r\n)|\n|\r" # \r\n (Windows), \n (UNIX), or \r (Mac)
chars = re.compile( eol ).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.see("insert")
return 1
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)
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)
self.text.focus_set()
return "break"
def save_a_copy(self, event):
filename = self.asksavefile()
if filename:
self.writefile(filename)
self.text.focus_set()
return "break"
def writefile(self, filename):
self.fixlastline()
try:
f = open(filename, "w")
chars = self.text.get("1.0", "end-1c")
f.write(chars)
f.close()
## print "saved to", `filename`
return 1
except IOError, msg:
tkMessageBox.showerror("I/O Error", str(msg),
master=self.text)
return 0
def fixlastline(self):
c = self.text.get("end-2c")
if c != '\n':
self.text.insert("end-1c", "\n")
opendialog = None
savedialog = None
filetypes = [
("Python and text files", "*.py *.pyw *.txt", "TEXT"),
("All text files", "*", "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)
return self.opendialog.show(initialdir=dir, initialfile=base)
def defaultfilename(self, mode="open"):
if self.filename:
return os.path.split(self.filename)
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)
return self.savedialog.show(initialdir=dir, initialfile=base)
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__":
from Tkinter import *
test()
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