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Use Ease-Out when swiping into the non-wrapped edges

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This commit is contained in:
Erik Reider 2024-01-23 18:55:12 +01:00
parent 54daaa9ed2
commit 0a619a03ab
1 changed files with 19 additions and 2 deletions
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21
sway/desktop/output.c
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@ -1117,6 +1117,15 @@ void handle_output_power_manager_set_mode(struct wl_listener *listener,
apply_output_config(oc, output);
}
static double lerp (double a, double b, double t) {
return a * (1.0 - t) + b * t;
}
static double ease_out_cubic (double t) {
double p = t - 1;
return pow(p, 3) + 1;
}
void workspace_scroll_begin(struct sway_seat *seat,
enum swipe_gesture_direction direction) {
struct sway_workspace *focused_ws = seat_get_focused_workspace(seat);
@ -1154,7 +1163,7 @@ void workspace_scroll_update(struct sway_seat *seat, double delta_sum,
double min = PREV_WS_LIMIT, max = NEXT_WS_LIMIT;
if (!config->workspace_gesture_wrap_around) {
// Visualized to the user that this is the last / first workspace by
// allowing a small swipe, a "Spring effect"
// allowing a small eased swipe, a "Spring effect"
double spring_limit = (double) config->workspace_gesture_spring_size /
output->width * output->wlr_output->scale;
// Make sure that the limit is always smaller than the threshold to
@ -1162,12 +1171,20 @@ void workspace_scroll_update(struct sway_seat *seat, double delta_sum,
double small_threshold = MAX(config->workspace_gesture_threshold - 0.1, 0);
spring_limit = MIN(small_threshold, spring_limit);
// Limit the percent depending on if the workspace is the first/last or in
// the middle somewhere.
// the middle somewhere. Uses ease_out to make the limit feel more natural.
if (visible_index + 1 >= output->workspaces->length) {
max = spring_limit;
if (percent > 0) {
percent = lerp(0, max, ease_out_cubic(fabs(percent)));
min = 0;
}
}
if (visible_index == 0) {
min = -spring_limit;
if (percent < 0) {
percent = lerp(0, min, ease_out_cubic(fabs(percent)));
max = 0;
}
}
}
ws_scroll->percent = CLAMP(percent, min, max);