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introduce wlr_output_layout_farthest_output

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Similar to wlr_output_layout_adjacent_output but will return the
one that is the farthest away from the reference in given direction.
This commit is contained in:
Armin Preiml 2018-08-25 09:14:55 +02:00
parent d7c027d3e3
commit 5617d2bd60
2 changed files with 30 additions and 4 deletions
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3
include/wlr/types/wlr_output_layout.h
View file

@ -126,5 +126,8 @@ enum wlr_direction {
struct wlr_output *wlr_output_layout_adjacent_output(
struct wlr_output_layout *layout, enum wlr_direction direction,
struct wlr_output *reference, double ref_lx, double ref_ly);
struct wlr_output *wlr_output_layout_farthest_output(
struct wlr_output_layout *layout, enum wlr_direction direction,
struct wlr_output *reference, double ref_lx, double ref_ly);
#endif

31
types/wlr_output_layout.c
View file

@ -430,15 +430,20 @@ struct wlr_output *wlr_output_layout_get_center_output(
return wlr_output_layout_output_at(layout, dest_x, dest_y);
}
enum distance_selection_method {
NEAREST,
FARTHEST
};
struct wlr_output *wlr_output_layout_adjacent_output(
struct wlr_output *wlr_output_layout_output_in_direction(
struct wlr_output_layout *layout, enum wlr_direction direction,
struct wlr_output *reference, double ref_lx, double ref_ly) {
struct wlr_output *reference, double ref_lx, double ref_ly,
enum distance_selection_method distance_method) {
assert(reference);
struct wlr_box *ref_box = wlr_output_layout_get_box(layout, reference);
double min_distance = DBL_MAX;
double min_distance = (distance_method == NEAREST) ? DBL_MAX : DBL_MIN;
struct wlr_output *closest_output = NULL;
struct wlr_output_layout_output *l_output;
wl_list_for_each(l_output, &layout->outputs, link) {
@ -471,10 +476,28 @@ struct wlr_output *wlr_output_layout_adjacent_output(
ref_lx, ref_ly, &x, &y);
double distance =
(x - ref_lx) * (x - ref_lx) + (y - ref_ly) * (y - ref_ly);
if (distance < min_distance) {
if ((distance_method == NEAREST)
? distance < min_distance
: distance > min_distance) {
min_distance = distance;
closest_output = l_output->output;
}
}
return closest_output;
}
struct wlr_output *wlr_output_layout_adjacent_output(
struct wlr_output_layout *layout, enum wlr_direction direction,
struct wlr_output *reference, double ref_lx, double ref_ly) {
return wlr_output_layout_output_in_direction(layout, direction,
reference, ref_lx, ref_ly, NEAREST);
}
struct wlr_output *wlr_output_layout_farthest_output(
struct wlr_output_layout *layout, enum wlr_direction direction,
struct wlr_output *reference, double ref_lx, double ref_ly) {
return wlr_output_layout_output_in_direction(layout, direction,
reference, ref_lx, ref_ly, FARTHEST);
}