261 lines
8.1 KiB
Python
261 lines
8.1 KiB
Python
# changes by dscherer@cmu.edu
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# - IOBinding.open() replaces the current window with the opened file,
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# if the current window is both unmodified and unnamed
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# - IOBinding.loadfile() interprets Windows, UNIX, and Macintosh
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# end-of-line conventions, instead of relying on the standard library,
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# which will only understand the local convention.
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import os
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import tkFileDialog
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import tkMessageBox
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import re
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#$ event <<open-window-from-file>>
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#$ win <Control-o>
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#$ unix <Control-x><Control-f>
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#$ event <<save-window>>
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#$ win <Control-s>
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#$ unix <Control-x><Control-s>
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#$ event <<save-window-as-file>>
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#$ win <Alt-s>
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#$ unix <Control-x><Control-w>
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#$ event <<save-copy-of-window-as-file>>
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#$ win <Alt-Shift-s>
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#$ unix <Control-x><w>
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class IOBinding:
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def __init__(self, editwin):
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self.editwin = editwin
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self.text = editwin.text
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self.__id_open = self.text.bind("<<open-window-from-file>>", self.open)
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self.__id_save = self.text.bind("<<save-window>>", self.save)
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self.__id_saveas = self.text.bind("<<save-window-as-file>>",
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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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def close(self):
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# Undo command bindings
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self.text.unbind("<<open-window-from-file>>", self.__id_open)
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self.text.unbind("<<save-window>>", self.__id_save)
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self.text.unbind("<<save-window-as-file>>",self.__id_saveas)
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self.text.unbind("<<save-copy-of-window-as-file>>", self.__id_savecopy)
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# Break cycles
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self.editwin = None
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self.text = None
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self.filename_change_hook = None
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def get_saved(self):
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return self.editwin.get_saved()
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def set_saved(self, flag):
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self.editwin.set_saved(flag)
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def reset_undo(self):
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self.editwin.reset_undo()
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filename_change_hook = None
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def set_filename_change_hook(self, hook):
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self.filename_change_hook = hook
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filename = None
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def set_filename(self, filename):
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self.filename = filename
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self.set_saved(1)
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if self.filename_change_hook:
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self.filename_change_hook()
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def open(self, event=None, editFile=None):
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if self.editwin.flist:
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if not editFile:
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filename = self.askopenfile()
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else:
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filename=editFile
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if filename:
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# if the current window has no filename and hasn't been
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# modified, we replace it's contents (no loss). Otherwise
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# we open a new window.
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if not self.filename and self.get_saved():
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self.editwin.flist.open(filename, self.loadfile)
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else:
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self.editwin.flist.open(filename)
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else:
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self.text.focus_set()
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return "break"
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# Code for use outside IDLE:
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if self.get_saved():
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reply = self.maybesave()
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if reply == "cancel":
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self.text.focus_set()
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return "break"
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if not editFile:
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filename = self.askopenfile()
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else:
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filename=editFile
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if filename:
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self.loadfile(filename)
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else:
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self.text.focus_set()
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return "break"
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def loadfile(self, filename):
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try:
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# open the file in binary mode so that we can handle
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# end-of-line convention ourselves.
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f = open(filename,'rb')
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chars = f.read()
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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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# 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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self.text.delete("1.0", "end")
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self.set_filename(None)
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self.text.insert("1.0", chars)
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self.reset_undo()
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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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def maybesave(self):
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if self.get_saved():
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return "yes"
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message = "Do you want to save %s before closing?" % (
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self.filename or "this untitled document")
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m = tkMessageBox.Message(
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title="Save On Close",
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message=message,
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icon=tkMessageBox.QUESTION,
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type=tkMessageBox.YESNOCANCEL,
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master=self.text)
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reply = m.show()
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if reply == "yes":
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self.save(None)
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if not self.get_saved():
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reply = "cancel"
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self.text.focus_set()
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return reply
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def save(self, event):
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if not self.filename:
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self.save_as(event)
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else:
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if self.writefile(self.filename):
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self.set_saved(1)
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self.text.focus_set()
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return "break"
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def save_as(self, event):
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filename = self.asksavefile()
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if filename:
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if self.writefile(filename):
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self.set_filename(filename)
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self.set_saved(1)
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self.text.focus_set()
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return "break"
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def save_a_copy(self, event):
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filename = self.asksavefile()
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if filename:
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self.writefile(filename)
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self.text.focus_set()
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return "break"
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def writefile(self, filename):
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self.fixlastline()
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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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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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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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filetypes = [
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("Python and text files", "*.py *.pyw *.txt", "TEXT"),
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("All text files", "*", "TEXT"),
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("All files", "*"),
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]
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def askopenfile(self):
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dir, base = self.defaultfilename("open")
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if not self.opendialog:
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self.opendialog = tkFileDialog.Open(master=self.text,
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filetypes=self.filetypes)
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return self.opendialog.show(initialdir=dir, initialfile=base)
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def defaultfilename(self, mode="open"):
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if self.filename:
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return os.path.split(self.filename)
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else:
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try:
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pwd = os.getcwd()
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except os.error:
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pwd = ""
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return pwd, ""
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def asksavefile(self):
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dir, base = self.defaultfilename("save")
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if not self.savedialog:
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self.savedialog = tkFileDialog.SaveAs(master=self.text,
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filetypes=self.filetypes)
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return self.savedialog.show(initialdir=dir, initialfile=base)
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def test():
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root = Tk()
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class MyEditWin:
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def __init__(self, text):
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self.text = text
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self.flist = None
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self.text.bind("<Control-o>", self.open)
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self.text.bind("<Control-s>", self.save)
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self.text.bind("<Alt-s>", self.save_as)
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self.text.bind("<Alt-z>", self.save_a_copy)
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def get_saved(self): return 0
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def set_saved(self, flag): pass
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def reset_undo(self): pass
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def open(self, event):
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self.text.event_generate("<<open-window-from-file>>")
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def save(self, event):
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self.text.event_generate("<<save-window>>")
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def save_as(self, event):
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self.text.event_generate("<<save-window-as-file>>")
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def save_a_copy(self, event):
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self.text.event_generate("<<save-copy-of-window-as-file>>")
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text = Text(root)
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text.pack()
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text.focus_set()
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editwin = MyEditWin(text)
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io = IOBinding(editwin)
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root.mainloop()
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if __name__ == "__main__":
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from Tkinter import *
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test()
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