Created
August 27, 2011 08:17
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IDLE - an extension to clear the shell window
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""" | |
Taken from: http://bugs.python.org/issue6143 | |
Clear Window Extension | |
Version: 0.2 | |
Author: Roger D. Serwy | |
roger.serwy@gmail.com | |
Date: 2009-06-14 | |
It provides "Clear Shell Window" under "Options" | |
with ability to undo. | |
Add these lines to config-extensions.def | |
[ClearWindow] | |
enable=1 | |
enable_editor=0 | |
enable_shell=1 | |
[ClearWindow_cfgBindings] | |
clear-window=<Control-Key-l> | |
""" | |
class ClearWindow: | |
menudefs = [ | |
('options', [None, | |
('Clear Shell Window', '<<clear-window>>'), | |
]),] | |
def __init__(self, editwin): | |
self.editwin = editwin | |
self.text = self.editwin.text | |
self.text.bind("<<clear-window>>", self.clear_window2) | |
self.text.bind("<<undo>>", self.undo_event) # add="+" doesn't work | |
def undo_event(self, event): | |
text = self.text | |
text.mark_set("iomark2", "iomark") | |
text.mark_set("insert2", "insert") | |
self.editwin.undo.undo_event(event) | |
# fix iomark and insert | |
text.mark_set("iomark", "iomark2") | |
text.mark_set("insert", "insert2") | |
text.mark_unset("iomark2") | |
text.mark_unset("insert2") | |
def clear_window2(self, event): # Alternative method | |
# work around the ModifiedUndoDelegator | |
text = self.text | |
text.undo_block_start() | |
text.mark_set("iomark2", "iomark") | |
text.mark_set("iomark", 1.0) | |
text.delete(1.0, "iomark2 linestart") | |
text.mark_set("iomark", "iomark2") | |
text.mark_unset("iomark2") | |
text.undo_block_stop() | |
if self.text.compare('insert', '<', 'iomark'): | |
self.text.mark_set('insert', 'end-1c') | |
self.editwin.set_line_and_column() | |
def clear_window(self, event): | |
# remove undo delegator | |
undo = self.editwin.undo | |
self.editwin.per.removefilter(undo) | |
# clear the window, but preserve current command | |
self.text.delete(1.0, "iomark linestart") | |
if self.text.compare('insert', '<', 'iomark'): | |
self.text.mark_set('insert', 'end-1c') | |
self.editwin.set_line_and_column() | |
# restore undo delegator | |
self.editwin.per.insertfilter(undo) | |
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