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fix(input): resolve isolated (non-ALT/META) mappings #13109

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Problem:
Since 2f06413dfb #13042, "ESC+c" sequence is treated as "ESC c"
instead of "M-c" (ALT/META+c) when not mapped, aka "fallthrough"
behavior. But "isolated" (non-ALT/META) mappings to ESC and c were not
resolved. This behavior is especially confusing for the TUI.

Solution:
Resolve isolated ESC, c mappings when there is no M-c mapping.
Change ins_char_typebuf() to escape CSI, K_SPECIAL.

fixes #13086
fixes #15869
This commit is contained in:
erw7 2021-10-03 06:27:37 +09:00 committed by GitHub
parent 79fb9ed080
commit c4857b695f
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 27 additions and 6 deletions
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18
src/nvim/getchar.c
View File

@ -1000,6 +1000,18 @@ void ins_char_typebuf(int c)
buf[3] = NUL;
} else {
buf[utf_char2bytes(c, buf)] = NUL;
char_u *p = buf;
while (*p) {
if ((uint8_t)(*p) == CSI || (uint8_t)(*p) == K_SPECIAL) {
bool is_csi = (uint8_t)(*p) == CSI;
memmove(p + 3, p + 1, STRLEN(p + 1) + 1);
*p++ = K_SPECIAL;
*p++ = is_csi ? KS_EXTRA : KS_SPECIAL;
*p++ = is_csi ? KE_CSI : KE_FILLER;
} else {
p++;
}
}
}
(void)ins_typebuf(buf, KeyNoremap, 0, !KeyTyped, cmd_silent);
}
@ -1573,9 +1585,9 @@ int vgetc(void)
if (!no_mapping && KeyTyped
&& (mod_mask == MOD_MASK_ALT || mod_mask == MOD_MASK_META)) {
mod_mask = 0;
stuffcharReadbuff(c);
u_sync(false);
c = ESC;
ins_char_typebuf(c);
ins_char_typebuf(ESC);
continue;
}
break;

15
test/functional/editor/meta_key_spec.lua
View File

@ -11,15 +11,20 @@ describe('meta-keys #8226 #13042', function()
end)
it('ALT/META, normal-mode', function()
-- Unmapped ALT-chords behave as ESC+c
-- Unmapped ALT-chord behaves as ESC+c.
insert('hello')
feed('0<A-x><M-x>')
expect('llo')
-- Unmapped ALT-chord resolves isolated (non-ALT) ESC mapping. #13086 #15869
command('nnoremap <ESC> A<lt>ESC><Esc>')
command('nnoremap ; A;<Esc>')
feed('<A-;><M-;>')
expect('llo<ESC>;<ESC>;')
-- Mapped ALT-chord behaves as mapped.
command('nnoremap <M-l> Ameta-l<Esc>')
command('nnoremap <A-j> Aalt-j<Esc>')
feed('<A-j><M-l>')
expect('lloalt-jmeta-l')
expect('llo<ESC>;<ESC>;alt-jmeta-l')
end)
it('ALT/META, visual-mode', function()
@ -27,11 +32,15 @@ describe('meta-keys #8226 #13042', function()
insert('peaches')
feed('viw<A-x>viw<M-x>')
expect('peach')
-- Unmapped ALT-chord resolves isolated (non-ALT) ESC mapping. #13086 #15869
command('vnoremap <ESC> A<lt>ESC>')
feed('viw<A-;><ESC>viw<M-;><ESC>')
expect('peach<ESC>;<ESC>;')
-- Mapped ALT-chord behaves as mapped.
command('vnoremap <M-l> Ameta-l<Esc>')
command('vnoremap <A-j> Aalt-j<Esc>')
feed('viw<A-j>viw<M-l>')
expect('peachalt-jmeta-l')
expect('peach<ESC>;<ESC>;alt-jmeta-l')
end)
it('ALT/META insert-mode', function()