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aiorepl: Add cursor left/right support. 

Allows modifying current line, adding/deleting characters in the middle
etc.  Includes home/end keys to move to start/end of current line.

Signed-off-by: Andrew Leech <andrew.leech@planetinnovation.com.au>
pull/756/head
Andrew Leech 2023-10-24 15:36:53 +11:00 zatwierdzone przez Damien George
rodzic d41851ca72
commit 10c9281dad
1 zmienionych plików z 42 dodań i 5 usunięć
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47
micropython/aiorepl/aiorepl.py
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@ -111,6 +111,7 @@ async def task(g=None, prompt="--> "):
sys.stdout.write(prompt)
cmd: str = ""
paste = False
curs = 0 # cursor offset from end of cmd buffer
while True:
b = await s.read(1)
pc = c # save previous character
@ -129,6 +130,10 @@ async def task(g=None, prompt="--> "):
# conversion, so ignore this linefeed.
if pc == 0x0A and time.ticks_diff(t, pt) < 20:
continue
if curs:
# move cursor to end of the line
sys.stdout.write("\x1B[{}C".format(curs))
curs = 0
sys.stdout.write("\n")
if cmd:
# Push current command.
@ -145,8 +150,16 @@ async def task(g=None, prompt="--> "):
elif c == 0x08 or c == 0x7F:
# Backspace.
if cmd:
cmd = cmd[:-1]
sys.stdout.write("\x08 \x08")
if curs:
cmd = "".join((cmd[: -curs - 1], cmd[-curs:]))
sys.stdout.write(
"\x08\x1B[K"
) # move cursor back, erase to end of line
sys.stdout.write(cmd[-curs:]) # redraw line
sys.stdout.write("\x1B[{}D".format(curs)) # reset cursor location
else:
cmd = cmd[:-1]
sys.stdout.write("\x08 \x08")
elif c == CHAR_CTRL_B:
continue
elif c == CHAR_CTRL_C:
@ -178,7 +191,7 @@ async def task(g=None, prompt="--> "):
elif c == 0x1B:
# Start of escape sequence.
key = await s.read(2)
if key in ("[A", "[B"):
if key in ("[A", "[B"): # up, down
# Stash the current command.
hist[(hist_i - hist_b) % _HISTORY_LIMIT] = cmd
# Clear current command.
@ -194,12 +207,36 @@ async def task(g=None, prompt="--> "):
# Update current command.
cmd = hist[(hist_i - hist_b) % _HISTORY_LIMIT]
sys.stdout.write(cmd)
elif key == "[D": # left
if curs < len(cmd) - 1:
curs += 1
sys.stdout.write("\x1B")
sys.stdout.write(key)
elif key == "[C": # right
if curs:
curs -= 1
sys.stdout.write("\x1B")
sys.stdout.write(key)
elif key == "[H": # home
pcurs = curs
curs = len(cmd)
sys.stdout.write("\x1B[{}D".format(curs - pcurs)) # move cursor left
elif key == "[F": # end
pcurs = curs
curs = 0
sys.stdout.write("\x1B[{}C".format(pcurs)) # move cursor right
else:
# sys.stdout.write("\\x")
# sys.stdout.write(hex(c))
pass
else:
sys.stdout.write(b)
cmd += b
if curs:
# inserting into middle of line
cmd = "".join((cmd[:-curs], b, cmd[-curs:]))
sys.stdout.write(cmd[-curs - 1 :]) # redraw line to end
sys.stdout.write("\x1B[{}D".format(curs)) # reset cursor location
else:
sys.stdout.write(b)
cmd += b
finally:
micropython.kbd_intr(3)