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Synchronize highlight position between outputs

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This change has the additional benefit of ensuring that the position
of the highlight only changes in reaction to a letter key or
backspace being pressed, and not when the compositor sends a new
configure event or the output needs to be redrawn for some other
reason.
This commit is contained in:
Manuel Stoeckl 2023-03-28 19:42:19 -04:00 committed by Kenny Levinsen
parent 1d3e62c67f
commit 75e837c31a
3 changed files with 10 additions and 3 deletions
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1
include/swaylock.h
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@ -87,6 +87,7 @@ struct swaylock_state {
cairo_surface_t *test_surface;
cairo_t *test_cairo; // used to estimate font/text sizes
enum auth_state auth_state;
uint32_t highlight_start; // position of highlight; 2048 = 1 full turn
int failed_attempts;
bool run_display, locked;
struct ext_session_lock_manager_v1 *ext_session_lock_manager_v1;

8
password.c
View File

@ -93,6 +93,12 @@ static void submit_password(struct swaylock_state *state) {
damage_state(state);
}
static void update_highlight(struct swaylock_state *state) {
// Advance a random amount between 1/4 and 3/4 of a full turn
state->highlight_start =
(state->highlight_start + (rand() % 1024) + 512) % 2048;
}
void swaylock_handle_key(struct swaylock_state *state,
xkb_keysym_t keysym, uint32_t codepoint) {
// Ignore input events if validating
@ -109,6 +115,7 @@ void swaylock_handle_key(struct swaylock_state *state,
case XKB_KEY_BackSpace:
if (backspace(&state->password)) {
state->auth_state = AUTH_STATE_BACKSPACE;
update_highlight(state);
} else {
state->auth_state = AUTH_STATE_CLEAR;
}
@ -160,6 +167,7 @@ void swaylock_handle_key(struct swaylock_state *state,
if (codepoint) {
append_ch(&state->password, codepoint);
state->auth_state = AUTH_STATE_INPUT;
update_highlight(state);
damage_state(state);
schedule_indicator_clear(state);
schedule_password_clear(state);

4
render.c
View File

@ -271,9 +271,7 @@ void render_frame(struct swaylock_surface *surface) {
// Typing indicator: Highlight random part on keypress
if (state->auth_state == AUTH_STATE_INPUT
|| state->auth_state == AUTH_STATE_BACKSPACE) {
static double highlight_start = 0;
highlight_start +=
(rand() % (int)(M_PI * 100)) / 100.0 + M_PI * 0.5;
double highlight_start = state->highlight_start * (M_PI / 1024.0);
cairo_arc(cairo, buffer_width / 2, buffer_diameter / 2,
arc_radius, highlight_start,
highlight_start + TYPE_INDICATOR_RANGE);