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Patch #1048820 from Stefan Wehr: add insert-mode editing to Textbox.

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Fix an off-by-one error I noticed.
This commit is contained in:
Andrew M. Kuchling 2008-01-20 00:00:38 +00:00
parent 350d03b18a
commit 4a2762d146
4 changed files with 35 additions and 13 deletions
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36
Lib/curses/textpad.py
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@ -39,8 +39,9 @@ class Textbox:
KEY_LEFT = Ctrl-B, KEY_RIGHT = Ctrl-F, KEY_UP = Ctrl-P, KEY_DOWN = Ctrl-N
KEY_BACKSPACE = Ctrl-h
"""
def __init__(self, win):
def __init__(self, win, insert_mode=False):
self.win = win
self.insert_mode = insert_mode
(self.maxy, self.maxx) = win.getmaxyx()
self.maxy = self.maxy - 1
self.maxx = self.maxx - 1
@ -49,9 +50,10 @@ class Textbox:
win.keypad(1)
def _end_of_line(self, y):
"Go to the location of the first blank on the given line."
"""Go to the location of the first blank on the given line,
returning the index of the last non-blank character."""
last = self.maxx
while 1:
while True:
if ascii.ascii(self.win.inch(y, last)) != ascii.SP:
last = min(self.maxx, last+1)
break
@ -60,19 +62,31 @@ class Textbox:
last = last - 1
return last
def _insert_printable_char(self, ch):
(y, x) = self.win.getyx()
if y < self.maxy or x < self.maxx:
if self.insert_mode:
oldch = self.win.inch()
# The try-catch ignores the error we trigger from some curses
# versions by trying to write into the lowest-rightmost spot
# in the window.
try:
self.win.addch(ch)
except curses.error:
pass
if self.insert_mode:
(backy, backx) = self.win.getyx()
if ascii.isprint(oldch):
self._insert_printable_char(oldch)
self.win.move(backy, backx)
def do_command(self, ch):
"Process a single editing command."
(y, x) = self.win.getyx()
self.lastcmd = ch
if ascii.isprint(ch):
if y < self.maxy or x < self.maxx:
# The try-catch ignores the error we trigger from some curses
# versions by trying to write into the lowest-rightmost spot
# in the window.
try:
self.win.addch(ch)
except curses.error:
pass
self._insert_printable_char(ch)
elif ch == ascii.SOH: # ^a
self.win.move(y, 0)
elif ch in (ascii.STX,curses.KEY_LEFT, ascii.BS,curses.KEY_BACKSPACE):
@ -139,7 +153,7 @@ class Textbox:
if stop == 0 and self.stripspaces:
continue
for x in range(self.maxx+1):
if self.stripspaces and x == stop:
if self.stripspaces and x > stop:
break
result = result + chr(ascii.ascii(self.win.inch(y, x)))
if self.maxy > 0: