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/opt/imh/python3.13/lib/python3.13/idlelib/

/opt/imh/python3.13/lib/python3.13/idlelib

Name	Size	Mode	Actions
Icons/	-	0755	rm
__pycache__/	-	0755	rm
autocomplete.py	9354	0644	edit dl rm
autocomplete_w.py	20863	0644	edit dl rm
autoexpand.py	3216	0644	edit dl rm
browser.py	8588	0644	edit dl rm
calltip.py	7267	0644	edit dl rm
calltip_w.py	7083	0644	edit dl rm
ChangeLog	56360	0644	edit dl rm
codecontext.py	11420	0644	edit dl rm
colorizer.py	14783	0644	edit dl rm
config-extensions.def	2266	0644	edit dl rm
config-highlight.def	2864	0644	edit dl rm
config-keys.def	10910	0644	edit dl rm
config-main.def	3168	0644	edit dl rm
config.py	38403	0644	edit dl rm
configdialog.py	105303	0644	edit dl rm
config_key.py	15230	0644	edit dl rm
CREDITS.txt	2148	0644	edit dl rm
debugger.py	20997	0644	edit dl rm
debugger_r.py	12115	0644	edit dl rm
debugobj.py	4177	0644	edit dl rm
debugobj_r.py	1082	0644	edit dl rm
delegator.py	1044	0644	edit dl rm
dynoption.py	1993	0644	edit dl rm
editor.py	69557	0644	edit dl rm
extend.txt	3632	0644	edit dl rm
filelist.py	3871	0644	edit dl rm
format.py	15777	0644	edit dl rm
grep.py	7521	0644	edit dl rm
help.html	60566	0644	edit dl rm
help.py	11843	0644	edit dl rm
help_about.py	9023	0644	edit dl rm
history.py	4065	0644	edit dl rm
HISTORY.txt	10313	0644	edit dl rm
hyperparser.py	12889	0644	edit dl rm
idle.bat	177	0644	edit dl rm
idle.py	454	0644	edit dl rm
idle.pyw	570	0644	edit dl rm
iomenu.py	16159	0644	edit dl rm
macosx.py	9290	0644	edit dl rm
mainmenu.py	3938	0644	edit dl rm
multicall.py	18652	0644	edit dl rm
NEWS2x.txt	27172	0644	edit dl rm
News3.txt	56818	0644	edit dl rm
outwin.py	5705	0644	edit dl rm
parenmatch.py	7204	0644	edit dl rm
pathbrowser.py	3093	0644	edit dl rm
percolator.py	3568	0644	edit dl rm
pyparse.py	19864	0644	edit dl rm
pyshell.py	62484	0755	edit dl rm
query.py	15067	0644	edit dl rm
README.txt	11653	0644	edit dl rm
redirector.py	6832	0644	edit dl rm
replace.py	9798	0644	edit dl rm
rpc.py	21078	0644	edit dl rm
run.py	21877	0644	edit dl rm
runscript.py	8273	0644	edit dl rm
scrolledlist.py	4478	0644	edit dl rm
search.py	5567	0644	edit dl rm
searchbase.py	7852	0644	edit dl rm
searchengine.py	7372	0644	edit dl rm
sidebar.py	20327	0644	edit dl rm
squeezer.py	12834	0644	edit dl rm
stackviewer.py	4016	0644	edit dl rm
statusbar.py	1474	0644	edit dl rm
textview.py	6808	0644	edit dl rm
TODO.txt	8477	0644	edit dl rm
tooltip.py	6665	0644	edit dl rm
tree.py	16773	0644	edit dl rm
undo.py	11016	0644	edit dl rm
util.py	1312	0644	edit dl rm
window.py	2616	0644	edit dl rm
zoomheight.py	4203	0644	edit dl rm
zzdummy.py	2005	0644	edit dl rm
__init__.py	396	0644	edit dl rm
__main__.py	107	0644	edit dl rm

Edit: /opt/imh/python3.13/lib/python3.13/idlelib/undo.py (11016B)

import string

from idlelib.delegator import Delegator

# tkinter import not needed because module does not create widgets,
# although many methods operate on text widget arguments.

#$ event <<redo>>
#$ win <Control-y>
#$ unix <Alt-z>

#$ event <<undo>>
#$ win <Control-z>
#$ unix <Control-z>

#$ event <<dump-undo-state>>
#$ win <Control-backslash>
#$ unix <Control-backslash>

class UndoDelegator(Delegator):

max_undo = 1000

def __init__(self):
        Delegator.__init__(self)
        self.reset_undo()

def setdelegate(self, delegate):
        if self.delegate is not None:
            self.unbind("<<undo>>")
            self.unbind("<<redo>>")
            self.unbind("<<dump-undo-state>>")
        Delegator.setdelegate(self, delegate)
        if delegate is not None:
            self.bind("<<undo>>", self.undo_event)
            self.bind("<<redo>>", self.redo_event)
            self.bind("<<dump-undo-state>>", self.dump_event)

def dump_event(self, event):
        from pprint import pprint
        pprint(self.undolist[:self.pointer])
        print("pointer:", self.pointer, end=' ')
        print("saved:", self.saved, end=' ')
        print("can_merge:", self.can_merge, end=' ')
        print("get_saved():", self.get_saved())
        pprint(self.undolist[self.pointer:])
        return "break"

def reset_undo(self):
        self.was_saved = -1
        self.pointer = 0
        self.undolist = []
        self.undoblock = 0  # or a CommandSequence instance
        self.set_saved(1)

def set_saved(self, flag):
        if flag:
            self.saved = self.pointer
        else:
            self.saved = -1
        self.can_merge = False
        self.check_saved()

def get_saved(self):
        return self.saved == self.pointer

saved_change_hook = None

def set_saved_change_hook(self, hook):
        self.saved_change_hook = hook

was_saved = -1

def check_saved(self):
        is_saved = self.get_saved()
        if is_saved != self.was_saved:
            self.was_saved = is_saved
            if self.saved_change_hook:
                self.saved_change_hook()

def insert(self, index, chars, tags=None):
        self.addcmd(InsertCommand(index, chars, tags))

def delete(self, index1, index2=None):
        self.addcmd(DeleteCommand(index1, index2))

# Clients should call undo_block_start() and undo_block_stop()
    # around a sequence of editing cmds to be treated as a unit by
    # undo & redo.  Nested matching calls are OK, and the inner calls
    # then act like nops.  OK too if no editing cmds, or only one
    # editing cmd, is issued in between:  if no cmds, the whole
    # sequence has no effect; and if only one cmd, that cmd is entered
    # directly into the undo list, as if undo_block_xxx hadn't been
    # called.  The intent of all that is to make this scheme easy
    # to use:  all the client has to worry about is making sure each
    # _start() call is matched by a _stop() call.

def undo_block_start(self):
        if self.undoblock == 0:
            self.undoblock = CommandSequence()
        self.undoblock.bump_depth()

def undo_block_stop(self):
        if self.undoblock.bump_depth(-1) == 0:
            cmd = self.undoblock
            self.undoblock = 0
            if len(cmd) > 0:
                if len(cmd) == 1:
                    # no need to wrap a single cmd
                    cmd = cmd.getcmd(0)
                # this blk of cmds, or single cmd, has already
                # been done, so don't execute it again
                self.addcmd(cmd, 0)

def addcmd(self, cmd, execute=True):
        if execute:
            cmd.do(self.delegate)
        if self.undoblock != 0:
            self.undoblock.append(cmd)
            return
        if self.can_merge and self.pointer > 0:
            lastcmd = self.undolist[self.pointer-1]
            if lastcmd.merge(cmd):
                return
        self.undolist[self.pointer:] = [cmd]
        if self.saved > self.pointer:
            self.saved = -1
        self.pointer = self.pointer + 1
        if len(self.undolist) > self.max_undo:
            ##print "truncating undo list"
            del self.undolist[0]
            self.pointer = self.pointer - 1
            if self.saved >= 0:
                self.saved = self.saved - 1
        self.can_merge = True
        self.check_saved()

def undo_event(self, event):
        if self.pointer == 0:
            self.bell()
            return "break"
        cmd = self.undolist[self.pointer - 1]
        cmd.undo(self.delegate)
        self.pointer = self.pointer - 1
        self.can_merge = False
        self.check_saved()
        return "break"

def redo_event(self, event):
        if self.pointer >= len(self.undolist):
            self.bell()
            return "break"
        cmd = self.undolist[self.pointer]
        cmd.redo(self.delegate)
        self.pointer = self.pointer + 1
        self.can_merge = False
        self.check_saved()
        return "break"

class Command:
    # Base class for Undoable commands

tags = None

def __init__(self, index1, index2, chars, tags=None):
        self.marks_before = {}
        self.marks_after = {}
        self.index1 = index1
        self.index2 = index2
        self.chars = chars
        if tags:
            self.tags = tags

def __repr__(self):
        s = self.__class__.__name__
        t = (self.index1, self.index2, self.chars, self.tags)
        if self.tags is None:
            t = t[:-1]
        return s + repr(t)

def do(self, text):
        pass

def redo(self, text):
        pass

def undo(self, text):
        pass

def merge(self, cmd):
        return 0

def save_marks(self, text):
        marks = {}
        for name in text.mark_names():
            if name != "insert" and name != "current":
                marks[name] = text.index(name)
        return marks

def set_marks(self, text, marks):
        for name, index in marks.items():
            text.mark_set(name, index)

class InsertCommand(Command):
    # Undoable insert command

def __init__(self, index1, chars, tags=None):
        Command.__init__(self, index1, None, chars, tags)

def do(self, text):
        self.marks_before = self.save_marks(text)
        self.index1 = text.index(self.index1)
        if text.compare(self.index1, ">", "end-1c"):
            # Insert before the final newline
            self.index1 = text.index("end-1c")
        text.insert(self.index1, self.chars, self.tags)
        self.index2 = text.index("%s+%dc" % (self.index1, len(self.chars)))
        self.marks_after = self.save_marks(text)
        ##sys.__stderr__.write("do: %s\n" % self)

def redo(self, text):
        text.mark_set('insert', self.index1)
        text.insert(self.index1, self.chars, self.tags)
        self.set_marks(text, self.marks_after)
        text.see('insert')
        ##sys.__stderr__.write("redo: %s\n" % self)

def undo(self, text):
        text.mark_set('insert', self.index1)
        text.delete(self.index1, self.index2)
        self.set_marks(text, self.marks_before)
        text.see('insert')
        ##sys.__stderr__.write("undo: %s\n" % self)

def merge(self, cmd):
        if self.__class__ is not cmd.__class__:
            return False
        if self.index2 != cmd.index1:
            return False
        if self.tags != cmd.tags:
            return False
        if len(cmd.chars) != 1:
            return False
        if self.chars and \
           self.classify(self.chars[-1]) != self.classify(cmd.chars):
            return False
        self.index2 = cmd.index2
        self.chars = self.chars + cmd.chars
        return True

alphanumeric = string.ascii_letters + string.digits + "_"

def classify(self, c):
        if c in self.alphanumeric:
            return "alphanumeric"
        if c == "\n":
            return "newline"
        return "punctuation"

class DeleteCommand(Command):
    # Undoable delete command

def __init__(self, index1, index2=None):
        Command.__init__(self, index1, index2, None, None)

def do(self, text):
        self.marks_before = self.save_marks(text)
        self.index1 = text.index(self.index1)
        if self.index2:
            self.index2 = text.index(self.index2)
        else:
            self.index2 = text.index(self.index1 + " +1c")
        if text.compare(self.index2, ">", "end-1c"):
            # Don't delete the final newline
            self.index2 = text.index("end-1c")
        self.chars = text.get(self.index1, self.index2)
        text.delete(self.index1, self.index2)
        self.marks_after = self.save_marks(text)
        ##sys.__stderr__.write("do: %s\n" % self)

def redo(self, text):
        text.mark_set('insert', self.index1)
        text.delete(self.index1, self.index2)
        self.set_marks(text, self.marks_after)
        text.see('insert')
        ##sys.__stderr__.write("redo: %s\n" % self)

def undo(self, text):
        text.mark_set('insert', self.index1)
        text.insert(self.index1, self.chars)
        self.set_marks(text, self.marks_before)
        text.see('insert')
        ##sys.__stderr__.write("undo: %s\n" % self)

class CommandSequence(Command):
    # Wrapper for a sequence of undoable cmds to be undone/redone
    # as a unit

def __init__(self):
        self.cmds = []
        self.depth = 0

def __repr__(self):
        s = self.__class__.__name__
        strs = []
        for cmd in self.cmds:
            strs.append(f"    {cmd!r}")
        return s + "(\n" + ",\n".join(strs) + "\n)"

def __len__(self):
        return len(self.cmds)

def append(self, cmd):
        self.cmds.append(cmd)

def getcmd(self, i):
        return self.cmds[i]

def redo(self, text):
        for cmd in self.cmds:
            cmd.redo(text)

def undo(self, text):
        cmds = self.cmds[:]
        cmds.reverse()
        for cmd in cmds:
            cmd.undo(text)

def bump_depth(self, incr=1):
        self.depth = self.depth + incr
        return self.depth

def _undo_delegator(parent):  # htest #
    from tkinter import Toplevel, Text, Button
    from idlelib.percolator import Percolator
    top = Toplevel(parent)
    top.title("Test UndoDelegator")
    x, y = map(int, parent.geometry().split('+')[1:])
    top.geometry("+%d+%d" % (x, y + 175))

text = Text(top, height=10)
    text.pack()
    text.focus_set()
    p = Percolator(text)
    d = UndoDelegator()
    p.insertfilter(d)

undo = Button(top, text="Undo", command=lambda:d.undo_event(None))
    undo.pack(side='left')
    redo = Button(top, text="Redo", command=lambda:d.redo_event(None))
    redo.pack(side='left')
    dump = Button(top, text="Dump", command=lambda:d.dump_event(None))
    dump.pack(side='left')

if __name__ == "__main__":
    from unittest import main
    main('idlelib.idle_test.test_undo', verbosity=2, exit=False)

from idlelib.idle_test.htest import run
    run(_undo_delegator)

cmd: