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Cleanup downward fractional line scrolling

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Kovid Goyal 2026-02-15 18:57:40 +05:30
parent 8471c0e2e4
commit a0b1adbda5
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GPG key ID: 06BC317B515ACE7C
1 changed files with 11 additions and 5 deletions
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16
kitty/screen.c
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@ -5086,11 +5086,17 @@ screen_fractional_scroll(Screen *self, double amt) {
double pixels = fractional_part * self->cell_size.height;
if (amt > 0) { // downwards
if (fractional_part != 0) pixels = MAX(1, pixels);
pixels = pixels > self->pixel_scroll_offset_y ? pixels - self->pixel_scroll_offset_y : 0;
self->pixel_scroll_offset_y = 0;
self->scrolled_by = self->scrolled_by > (unsigned)lines ? self->scrolled_by - lines : 0;
if (pixels > 0 && self->scrolled_by > 0) {
self->scrolled_by--; self->pixel_scroll_offset_y = self->cell_size.height - pixels;
if (lines > (int)self->scrolled_by) {
self->scrolled_by = 0; self->pixel_scroll_offset_y = 0;
} else {
self->scrolled_by -= lines;
if (pixels <= self->pixel_scroll_offset_y) self->pixel_scroll_offset_y -= pixels;
else {
self->pixel_scroll_offset_y = 0;
if (self->scrolled_by) {
self->scrolled_by--; self->pixel_scroll_offset_y = self->cell_size.height - pixels;
}
}
}
} else {
if (fractional_part != 0) pixels = MIN(-1, pixels);