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sculpt: 'Sculpt::match_sub_dialog' function

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This free-standing function is meant to gradually replace
'Dialog::match_sub_dialog' interface, which relies on the caching of
the hover state. The new function is more flexible because dialogs do no
longer need to inherit 'Dialog'.
This commit is contained in:
Norman Feske 2023-03-22 17:37:47 +01:00 committed by Christian Helmuth
parent b91e5353ba
commit daf53df670
1 changed files with 42 additions and 0 deletions
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42
repos/gems/src/app/sculpt_manager/view/dialog.h
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@ -97,6 +97,48 @@ struct Sculpt::Dialog : Interface
return result; return result;
} }
/*
* Helpe for the 'Sculpt::match_sub_dialog' implementation below
*/
template <typename DIALOG>
struct _Recurse
{
DIALOG &dialog;
Hover_result result = Hover_result::UNMODIFIED;
_Recurse(DIALOG &dialog) : dialog(dialog) { }
template <typename... TAIL>
void match(Xml_node const &hover, char const *head, TAIL &&... tail)
{
hover.with_optional_sub_node(head, [&] (Xml_node const &sub_node) {
match(sub_node, tail...); });
}
void match(Xml_node const &hover) { result = dialog.hover(hover); }
};
}; };
namespace Sculpt {
template <typename DIALOG, typename... ARGS>
static inline Hoverable_item::Hover_result
match_sub_dialog(Xml_node const &hover, DIALOG &dialog, ARGS &&... args)
{
Dialog::_Recurse recurse { dialog };
recurse.match(hover, args...);
static Xml_node const unhovered { "<empty/>" };
if (recurse.result == Hoverable_item::Hover_result::UNMODIFIED)
dialog.hover(unhovered);
return recurse.result;
}
}
#endif /* _VIEW__DIALOG_H_ */ #endif /* _VIEW__DIALOG_H_ */