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@ scroll-window: When scrolling by fractional lines and the fractional part is non-zero scroll by one pixel at least

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Kovid Goyal 2026-02-15 15:06:56 +05:30
parent ebafe8ef5b
commit 8471c0e2e4
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kitty/screen.c
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@ -5085,6 +5085,7 @@ screen_fractional_scroll(Screen *self, double amt) {
int lines = (int)integral_part;
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;
@ -5092,6 +5093,7 @@ screen_fractional_scroll(Screen *self, double amt) {
self->scrolled_by--; self->pixel_scroll_offset_y = self->cell_size.height - pixels;
}
} else {
if (fractional_part != 0) pixels = MIN(-1, pixels);
self->pixel_scroll_offset_y -= pixels; // pixels is negative
if (self->pixel_scroll_offset_y >= self->cell_size.height) {
self->pixel_scroll_offset_y = 0; self->scrolled_by++;