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51215: consume whole CSI sequences from the input

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This affects CSI sequences that aren't explicitly bound but arrive
within the usual KEYTIMEOUT time limits. A single undefined-key widget
is run instead of unintended bindings for Escape and other characters in
the sequence.
This commit is contained in:
Oliver Kiddle 2022-12-16 23:12:54 +01:00
parent 1de8baded2
commit 7fb6c133bf
4 changed files with 60 additions and 2 deletions
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6
ChangeLog
View file

@ -1,3 +1,9 @@
2022-12-16 Oliver Kiddle <opk@zsh.org>
* 51215: Src/Zle/zle_keymap.c, Test/X03zlebindkey.ztst,
Test/X02zlevi.ztst: consume whole CSI sequences from the input
even where they aren't explicitly bound
2022-12-15 Daniel Shahaf <d.s@daniel.shahaf.name>
* unposted: Src/zsh.h: Follow-up to the last commit: Fix a typo

27
Src/Zle/zle_keymap.c
View file

@ -1586,7 +1586,7 @@ getkeymapcmd(Keymap km, Thingy *funcp, char **strp)
Thingy func = t_undefinedkey;
char *str = NULL;
int lastlen = 0, lastc = lastchar;
int timeout = 0;
int timeout = 0, csi = 0, startcsi;
keybuflen = 0;
keybuf[0] = 0;
@ -1636,7 +1636,30 @@ getkeymapcmd(Keymap km, Thingy *funcp, char **strp)
}
#endif
}
if (!ispfx)
/* CSI key sequences have a well defined structure so if we currently
* have an incomplete one, loop so the rest of it will be included in
* the key sequence if that arrives within the timeout. */
if (keybuflen >= 3 && !csi) {
startcsi = keybuflen - 3;
csi = keybuf[startcsi] == '\033' && keybuf[keybuflen - 2] == '[';
}
if (csi) {
csi = keybuf[keybuflen - 2] != Meta && keybuf[keybuflen - 1] >= 0x20
&& keybuf[keybuflen - 1] <= 0x3f;
/* If we reach the end of a valid CSI sequence and the matched key
* binding is for part of the CSI introduction, select instead the
* undefined-key widget and consume the full sequence from the
* input buffer. */
if (!csi && keybuf[keybuflen - 1] >= 0x40 &&
keybuf[keybuflen - 1] <= 0x7e && lastlen > startcsi &&
lastlen <= startcsi + 2) {
func = t_undefinedkey;
lastlen = keybuflen;
}
}
if (!ispfx && !csi)
break;
}
if(!lastlen && keybuflen)

7
Test/X02zlevi.ztst
View file

@ -596,6 +596,13 @@
>BUFFER: 1ls `2` $(3) "4" $'5' ${6}
>CURSOR: 0
zpty_run 'bindkey -s -a "cw" "dwi"'
zletest $'one two\e0cwyksi'
zpty_run 'bindkey -r -a "cw"'
0:for a vi command, wait to allow a longer binding to be used
>BUFFER: yksitwo
>CURSOR: 4
%clean
zmodload -ui zsh/zpty

22
Test/X03zlebindkey.ztst
View file

@ -37,6 +37,28 @@
>"^Xy" "bar"
>"^Xy" undefined-key
zpty_run 'bindkey -s "\e[" altbracket'
zletest $'$\C-A\e[17~'
zpty_run 'bindkey -r "\e["'
0:binding to CSI introduction is not used if a full sequence arrives
>BUFFER: $
>CURSOR: 0
zpty_run 'bindkey -s "\e[1" altbracketone'
zletest $'$\C-A\e[17~'
zpty_run 'bindkey -r "\e[1"'
0:binding to longer prefix of a CSI sequence is used
# we assume the user knows what they're doing
>BUFFER: altbracketone7~$
>CURSOR: 15
zpty_run 'bindkey -s "\e[" altbracket'
zletest $'$\C-A\e[177'
zpty_run 'bindkey -r "\e["'
0:use prefix binding where we don't have a CSI sequence
>BUFFER: altbracket177$
>CURSOR: 13
# As we're only looking at definitions here, we don't
# bother using the pseudo-terminal; just test in the normal fashion.
bindkey -e