#include <psemek/ui/key_interceptor.hpp>
#include <psemek/ui/null_shape.hpp>

namespace psemek::ui
{

	std::shared_ptr<element> key_interceptor::set_child(std::shared_ptr<element> c)
	{
		auto old = std::move(child_);
		if (old) old->set_parent(nullptr);

		child_ = std::move(c);
		if (child_) child_->set_parent(this);
		children_[0] = child_.get();

		return old;
	}

	geom::box<float, 2> key_interceptor::size_constraints() const
	{
		if (child_)
			return child_->size_constraints();
		return element::size_constraints();
	}

	shape const & key_interceptor::shape() const
	{
		static const null_shape fallback_shape;
		if (child_)
			return child_->shape();
		return fallback_shape;
	}

	void key_interceptor::reshape(geom::box<float, 2> const & bbox)
	{
		if (child_)
			child_->reshape(bbox);
	}

	void key_interceptor::on_key_down(std::function<bool(SDL_Keycode)> callback)
	{
		callback_ = std::move(callback);
	}

	bool key_interceptor::on_event(key_press const & event)
	{
		if (callback_ && event.down)
		{
			return callback_(event.key);
		}

		return false;
	}

}