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nitpicker: invalidate dangling hovered ptr

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This patch adds the missing invalidation of the _hovered pointer to
User_state::forget, which is required to cover the situation where the
owner of the hovered view vanishes.

Fixes #4011
This commit is contained in:
Norman Feske 2021-02-07 12:51:05 +01:00
parent d29b843a0f
commit b5fb37ddee
1 changed files with 14 additions and 8 deletions
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22
repos/os/src/server/nitpicker/user_state.cc
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@ -396,23 +396,29 @@ User_state::Handle_forget_result User_state::forget(View_owner const &owner)
_focus.forget(owner);
bool const need_to_update_all_views = (&owner == _focused);
bool const focus_changed = &owner == _focused;
bool const focus_vanished = (&owner == _focused);
bool const hover_vanished = (&owner == _hovered);
if (&owner == _focused) _focused = nullptr;
if (&owner == _next_focused) _next_focused = nullptr;
if (&owner == _last_clicked) _last_clicked = nullptr;
auto wipe_ptr = [&] (auto &ptr) {
if (&owner == ptr)
ptr = nullptr; };
wipe_ptr(_focused);
wipe_ptr(_next_focused);
wipe_ptr(_last_clicked);
wipe_ptr(_hovered);
Update_hover_result const update_hover_result = update_hover();
if (_input_receiver == &owner)
_input_receiver = nullptr;
wipe_ptr(_input_receiver);
if (need_to_update_all_views)
_view_stack.update_all_views();
return {
.hover_changed = update_hover_result.hover_changed,
.focus_changed = focus_changed,
.hover_changed = update_hover_result.hover_changed
| hover_vanished,
.focus_changed = focus_vanished,
};
}