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nitpicker: allow pointer move along screen edges

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Issue #5352
This commit is contained in:
Norman Feske 2024-10-28 15:44:23 +01:00 committed by Christian Helmuth
parent 732f310b26
commit da6124c087
1 changed files with 28 additions and 2 deletions
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30
repos/os/src/server/nitpicker/main.cc
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@ -739,10 +739,36 @@ struct Nitpicker::Main : Focus_updater, Hover_updater,
*/
Pointer sanitized_pointer_position(Pointer const orig_pos, Point pos) override
{
if (_capture_root.visible(pos) || _visible_at_fb_screen(pos))
auto visible = [&] (Pointer p)
{
return _capture_root.visible(p) || _visible_at_fb_screen(p);
};
auto for_each_value = [] (int const from, int const to, auto const &fn)
{
int const step = (from < to) ? 1 : -1;
for (int i = from; i != to; i += step)
fn(i);
};
if (visible(pos))
return pos;
if (_capture_root.visible(orig_pos) || _visible_at_fb_screen(orig_pos))
/* move pointer along screen edge */
if (orig_pos.ok()) {
Point best = orig_pos.convert<Point>(
[&] (Point p) { return p; },
[&] (Nowhere) { return Point { }; });
auto try_better = [&] (Point p) { if (visible(p)) best = p; };
for_each_value(best.x, pos.x, [&] (int x) { try_better({ x, best.y }); });
for_each_value(best.y, pos.y, [&] (int y) { try_better({ best.x, y }); });
return best;
}
if (visible(orig_pos))
return orig_pos;
Pointer const captured_pos = _capture_root.any_visible_pointer_position();