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Merge pull request #632 from acrisci/output-layout-adjacent
add wlr_output_layout_adjacent_output
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commit
09cfa39392
2 changed files with 64 additions and 0 deletions
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@ -96,4 +96,19 @@ void wlr_output_layout_add_auto(struct wlr_output_layout *layout,
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struct wlr_output *wlr_output_layout_get_center_output(
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struct wlr_output *wlr_output_layout_get_center_output(
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struct wlr_output_layout *layout);
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struct wlr_output_layout *layout);
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enum wlr_direction {
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WLR_DIRECTION_UP = 0,
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WLR_DIRECTION_DOWN = 1,
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WLR_DIRECTION_LEFT = 2,
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WLR_DIRECTION_RIGHT = 4,
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};
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/**
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* Get the closest adjacent output to the reference output from the reference
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* point in the given direction.
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*/
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struct wlr_output *wlr_output_layout_adjacent_output(
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struct wlr_output_layout *layout, enum wlr_direction direction,
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struct wlr_output *reference, double ref_x, double ref_y);
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#endif
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#endif
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@ -436,3 +436,52 @@ struct wlr_output *wlr_output_layout_get_center_output(
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return wlr_output_layout_output_at(layout, dest_x, dest_y);
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return wlr_output_layout_output_at(layout, dest_x, dest_y);
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}
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}
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struct wlr_output *wlr_output_layout_adjacent_output(
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struct wlr_output_layout *layout, enum wlr_direction direction,
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struct wlr_output *reference, double ref_x, double ref_y) {
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assert(reference);
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struct wlr_box *ref_box = wlr_output_layout_get_box(layout, reference);
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double min_distance = DBL_MAX;
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struct wlr_output *closest_output = NULL;
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struct wlr_output_layout_output *l_output;
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wl_list_for_each(l_output, &layout->outputs, link) {
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if (reference != NULL && reference == l_output->output) {
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continue;
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}
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struct wlr_box *box = wlr_output_layout_output_get_box(l_output);
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bool match = false;
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// test to make sure this output is in the given direction
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if (direction & WLR_DIRECTION_LEFT) {
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match = box->x + box->width <= ref_box->x || match;
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}
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if (direction & WLR_DIRECTION_RIGHT) {
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match = box->x >= ref_box->x + ref_box->width || match;
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}
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if (direction & WLR_DIRECTION_UP) {
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match = box->y + box->height <= ref_box->y || match;
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}
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if (direction & WLR_DIRECTION_DOWN) {
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match = box->y >= ref_box->y + ref_box->height || match;
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}
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if (!match) {
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continue;
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}
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// calculate distance from the given reference point
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double x, y;
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wlr_output_layout_closest_point(layout, l_output->output,
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ref_x, ref_y, &x, &y);
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double distance =
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(x - ref_x) * (x - ref_x) + (y - ref_y) * (y - ref_y);
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if (distance < min_distance) {
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min_distance = distance;
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closest_output = l_output->output;
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}
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}
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return closest_output;
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}
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