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input: don’t allow non-significant modifiers when matching untranslated symbols

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When matching “untranslated” bindings (by matching the base symbol of
the key, e.g. ctrl+shift+2 in US layout), require that no
non-significant modifiers are active.

This fixes an issue where AltGr was “ignored”, and would cause certain
combinations to match a key binding.

Example: ctrl+altgr+0, on many European layouts matched against the
default ctrl+0 (reset the font size), instead of emitting ^]

To make this work, we now need to filter out “locked”
modifiers (e.g. NumLock and CapsLock). Otherwise having e.g. NumLock
active would prevent *all* untranslated matching to fail.

Closes #983
This commit is contained in:
Daniel Eklöf 2022-03-19 18:59:15 +01:00
parent dcdbb3613c
commit 1e63dddb89
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GPG key ID: 5BBD4992C116573F
6 changed files with 33 additions and 9 deletions
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2
CHANGELOG.md
View file

@ -89,6 +89,8 @@
overrides on the command line.
* Crash when seat has no keyboard
(https://codeberg.org/dnkl/foot/issues/963).
* Key presses with e.g. `AltGr` triggering key combinations with the
base symbol (https://codeberg.org/dnkl/foot/issues/983).
### Security

19
input.c
View file

@ -1030,6 +1030,12 @@ get_current_modifiers(const struct seat *seat,
}
}
static xkb_mod_mask_t
get_locked_modifiers(const struct seat *seat)
{
return xkb_state_serialize_mods(seat->kbd.xkb_state, XKB_STATE_MODS_LOCKED);
}
struct kbd_ctx {
xkb_layout_index_t layout;
xkb_keycode_t key;
@ -1488,8 +1494,11 @@ key_press_release(struct seat *seat, struct terminal *term, uint32_t serial,
xkb_mod_mask_t mods, consumed;
get_current_modifiers(seat, &mods, &consumed, key);
xkb_mod_mask_t bind_mods = mods & seat->kbd.bind_significant;
xkb_mod_mask_t bind_consumed = consumed & seat->kbd.bind_significant;
const xkb_mod_mask_t locked = get_locked_modifiers(seat);
const xkb_mod_mask_t bind_mods
= mods & seat->kbd.bind_significant & ~locked;
const xkb_mod_mask_t bind_consumed =
consumed & seat->kbd.bind_significant & ~locked;
xkb_layout_index_t layout_idx =
xkb_state_key_get_layout(seat->kbd.xkb_state, key);
@ -1504,7 +1513,7 @@ key_press_release(struct seat *seat, struct terminal *term, uint32_t serial,
start_repeater(seat, key);
search_input(
seat, term, key, sym, bind_mods, bind_consumed,
seat, term, key, sym, mods, consumed, locked,
raw_syms, raw_count, serial);
return;
}
@ -1514,7 +1523,7 @@ key_press_release(struct seat *seat, struct terminal *term, uint32_t serial,
start_repeater(seat, key);
urls_input(
seat, term, key, sym, bind_mods, bind_consumed,
seat, term, key, sym, mods, consumed, locked,
raw_syms, raw_count, serial);
return;
}
@ -1553,7 +1562,7 @@ key_press_release(struct seat *seat, struct terminal *term, uint32_t serial,
goto maybe_repeat;
}
if (bind->mods != bind_mods)
if (bind->mods != bind_mods || bind_mods != (mods & ~locked))
continue;
/* Match untranslated symbols */

9
search.c
View file

@ -822,11 +822,16 @@ execute_binding(struct seat *seat, struct terminal *term,
void
search_input(struct seat *seat, struct terminal *term, uint32_t key,
xkb_keysym_t sym, xkb_mod_mask_t mods, xkb_mod_mask_t consumed,
xkb_mod_mask_t locked,
const xkb_keysym_t *raw_syms, size_t raw_count,
uint32_t serial)
{
LOG_DBG("search: input: sym=%d/0x%x, mods=0x%08x", sym, sym, mods);
const xkb_mod_mask_t bind_mods =
mods & seat->kbd.bind_significant & ~locked;
const xkb_mod_mask_t bind_consumed =
consumed & seat->kbd.bind_significant & ~locked;
enum xkb_compose_status compose_status = seat->kbd.xkb_compose_state != NULL
? xkb_compose_state_get_status(seat->kbd.xkb_compose_state)
: XKB_COMPOSE_NOTHING;
@ -840,7 +845,7 @@ search_input(struct seat *seat, struct terminal *term, uint32_t key,
/* Match translated symbol */
if (bind->k.sym == sym &&
bind->mods == (mods & ~consumed)) {
bind->mods == (bind_mods & ~bind_consumed)) {
if (execute_binding(seat, term, bind, serial,
&update_search_result, &redraw))
@ -850,7 +855,7 @@ search_input(struct seat *seat, struct terminal *term, uint32_t key,
return;
}
if (bind->mods != mods)
if (bind->mods != bind_mods || bind_mods != (mods & ~locked))
continue;
/* Match untranslated symbols */

1
search.h
View file

@ -8,6 +8,7 @@ void search_cancel(struct terminal *term);
void search_input(
struct seat *seat, struct terminal *term, uint32_t key,
xkb_keysym_t sym, xkb_mod_mask_t mods, xkb_mod_mask_t consumed,
xkb_mod_mask_t locked,
const xkb_keysym_t *raw_syms, size_t raw_count,
uint32_t serial);
void search_add_chars(struct terminal *term, const char *text, size_t len);

10
url-mode.c
View file

@ -119,22 +119,28 @@ activate_url(struct seat *seat, struct terminal *term, const struct url *url)
void
urls_input(struct seat *seat, struct terminal *term, uint32_t key,
xkb_keysym_t sym, xkb_mod_mask_t mods, xkb_mod_mask_t consumed,
xkb_mod_mask_t locked,
const xkb_keysym_t *raw_syms, size_t raw_count,
uint32_t serial)
{
const xkb_mod_mask_t bind_mods =
mods & seat->kbd.bind_significant & ~locked;
const xkb_mod_mask_t bind_consumed =
consumed & seat->kbd.bind_significant & ~locked;
/* Key bindings */
tll_foreach(seat->kbd.bindings.url, it) {
const struct key_binding *bind = &it->item;
/* Match translated symbol */
if (bind->k.sym == sym &&
bind->mods == (mods & ~consumed))
bind->mods == (bind_mods & ~bind_consumed))
{
execute_binding(seat, term, bind, serial);
return;
}
if (bind->mods != mods)
if (bind->mods != bind_mods || bind_mods != (mods & ~locked))
continue;
for (size_t i = 0; i < raw_count; i++) {

1
url-mode.h
View file

@ -21,5 +21,6 @@ void urls_reset(struct terminal *term);
void urls_input(struct seat *seat, struct terminal *term, uint32_t key,
xkb_keysym_t sym, xkb_mod_mask_t mods, xkb_mod_mask_t consumed,
xkb_mod_mask_t locked,
const xkb_keysym_t *raw_syms, size_t raw_count,
uint32_t serial);