From 4fde43313ca3ae4b8da8d5c516a2a06e14a226d7 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Sat, 10 Aug 2024 11:58:21 +0300
Subject: [PATCH] Reactive UI library wip: add floating, shape_reader and
 storage

---
 libs/ui/include/psemek/ui/floating.hpp        | 20 +++++++
 .../include/psemek/ui/impl/floating_base.hpp  | 28 +++++++++
 .../psemek/ui/impl/shape_reader_base.hpp      | 23 ++++++++
 .../include/psemek/ui/impl/storage_base.hpp   | 29 +++++++++
 libs/ui/include/psemek/ui/shape_reader.hpp    | 17 ++++++
 libs/ui/include/psemek/ui/storage.hpp         | 19 ++++++
 .../source/impl/default_component_factory.cpp |  5 ++
 libs/ui/source/impl/floating_base.cpp         | 49 +++++++++++++++
 libs/ui/source/impl/shape_reader_base.cpp     | 35 +++++++++++
 libs/ui/source/impl/storage_base.cpp          | 59 +++++++++++++++++++
 10 files changed, 284 insertions(+)
 create mode 100644 libs/ui/include/psemek/ui/floating.hpp
 create mode 100644 libs/ui/include/psemek/ui/impl/floating_base.hpp
 create mode 100644 libs/ui/include/psemek/ui/impl/shape_reader_base.hpp
 create mode 100644 libs/ui/include/psemek/ui/impl/storage_base.hpp
 create mode 100644 libs/ui/include/psemek/ui/shape_reader.hpp
 create mode 100644 libs/ui/include/psemek/ui/storage.hpp
 create mode 100644 libs/ui/source/impl/floating_base.cpp
 create mode 100644 libs/ui/source/impl/shape_reader_base.cpp
 create mode 100644 libs/ui/source/impl/storage_base.cpp

diff --git a/libs/ui/include/psemek/ui/floating.hpp b/libs/ui/include/psemek/ui/floating.hpp
new file mode 100644
index 00000000..f9099dbd
--- /dev/null
+++ b/libs/ui/include/psemek/ui/floating.hpp
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <psemek/ui/aligned.hpp>
+#include <psemek/react/value.hpp>
+#include <psemek/geom/point.hpp>
+
+#include <any>
+
+namespace psemek::ui
+{
+
+	struct floating
+	{
+		react::value<std::any> child = {};
+		react::value<geom::point<float, 2>> anchor = {0.f, 0.f};
+		react::value<halignment> halign = halignment::center;
+		react::value<valignment> valign = valignment::center;
+	};
+
+}
diff --git a/libs/ui/include/psemek/ui/impl/floating_base.hpp b/libs/ui/include/psemek/ui/impl/floating_base.hpp
new file mode 100644
index 00000000..99589fbb
--- /dev/null
+++ b/libs/ui/include/psemek/ui/impl/floating_base.hpp
@@ -0,0 +1,28 @@
+#pragma once
+
+#include <psemek/ui/floating.hpp>
+#include <psemek/ui/impl/single_container.hpp>
+#include <psemek/react/source.hpp>
+
+namespace psemek::ui::impl
+{
+
+	struct floating_base
+		: single_container
+	{
+		floating_base();
+
+		void reshape(geom::box<float, 2> const & new_shape) override;
+		react::value<struct size_constraints> size_constraints() const override;
+
+		void update(floating const & value);
+
+	private:
+		react::value<geom::point<float, 2>> anchor_ = geom::point{0.f, 0.f};
+		react::value<halignment> halign_ = halignment::center;
+		react::value<valignment> valign_ = valignment::center;
+
+		react::value<struct size_constraints> size_constraints_;
+	};
+
+}
diff --git a/libs/ui/include/psemek/ui/impl/shape_reader_base.hpp b/libs/ui/include/psemek/ui/impl/shape_reader_base.hpp
new file mode 100644
index 00000000..1d65b895
--- /dev/null
+++ b/libs/ui/include/psemek/ui/impl/shape_reader_base.hpp
@@ -0,0 +1,23 @@
+#pragma once
+
+#include <psemek/ui/shape_reader.hpp>
+#include <psemek/ui/impl/single_container.hpp>
+
+namespace psemek::ui::impl
+{
+
+	struct shape_reader_base
+		: single_container
+	{
+		shape_reader_base();
+
+		void reshape(geom::box<float, 2> const & new_shape) override;
+		react::value<struct size_constraints> size_constraints() const override;
+
+		void update(shape_reader const & value);
+
+	private:
+		react::source<geom::box<float, 2>> shape_ = {};
+	};
+
+}
diff --git a/libs/ui/include/psemek/ui/impl/storage_base.hpp b/libs/ui/include/psemek/ui/impl/storage_base.hpp
new file mode 100644
index 00000000..d34498b4
--- /dev/null
+++ b/libs/ui/include/psemek/ui/impl/storage_base.hpp
@@ -0,0 +1,29 @@
+#pragma once
+
+#include <psemek/ui/storage.hpp>
+#include <psemek/ui/impl/single_container.hpp>
+#include <psemek/react/source.hpp>
+
+namespace psemek::ui::impl
+{
+
+	struct storage_base
+		: single_container
+	{
+		storage_base();
+
+		void reshape(geom::box<float, 2> const & new_shape) override;
+		react::value<struct size_constraints> size_constraints() const override;
+
+		void set_child(std::unique_ptr<component> child) override;
+		std::unique_ptr<component> release_child() override;
+
+		void update(storage const & value);
+
+	private:
+		util::hash_map<std::string, react::source<std::any>> values_;
+		react::source<react::value<struct size_constraints>> child_size_constraints_;
+		react::value<struct size_constraints> size_constraints_;
+	};
+
+}
diff --git a/libs/ui/include/psemek/ui/shape_reader.hpp b/libs/ui/include/psemek/ui/shape_reader.hpp
new file mode 100644
index 00000000..96b14717
--- /dev/null
+++ b/libs/ui/include/psemek/ui/shape_reader.hpp
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <psemek/react/source.hpp>
+#include <psemek/geom/box.hpp>
+
+#include <any>
+
+namespace psemek::ui
+{
+
+	struct shape_reader
+	{
+		react::value<std::any> child = {};
+		react::source<geom::box<float, 2>> shape = {};
+	};
+
+}
diff --git a/libs/ui/include/psemek/ui/storage.hpp b/libs/ui/include/psemek/ui/storage.hpp
new file mode 100644
index 00000000..261ddf59
--- /dev/null
+++ b/libs/ui/include/psemek/ui/storage.hpp
@@ -0,0 +1,19 @@
+#pragma once
+
+#include <psemek/react/source.hpp>
+#include <psemek/geom/box.hpp>
+#include <psemek/util/hash_table.hpp>
+
+#include <any>
+
+namespace psemek::ui
+{
+
+	struct storage
+	{
+		react::value<std::any> child = {};
+
+		util::hash_map<std::string, react::source<std::any>> values = {};
+	};
+
+}
diff --git a/libs/ui/source/impl/default_component_factory.cpp b/libs/ui/source/impl/default_component_factory.cpp
index 6817eef7..0be79d31 100644
--- a/libs/ui/source/impl/default_component_factory.cpp
+++ b/libs/ui/source/impl/default_component_factory.cpp
@@ -13,6 +13,9 @@
 #include <psemek/ui/impl/move_base.hpp>
 #include <psemek/ui/impl/button_base.hpp>
 #include <psemek/ui/impl/label_base.hpp>
+#include <psemek/ui/impl/floating_base.hpp>
+#include <psemek/ui/impl/shape_reader_base.hpp>
+#include <psemek/ui/impl/storage_base.hpp>
 
 namespace psemek::ui::impl
 {
@@ -31,6 +34,8 @@ namespace psemek::ui::impl
 		register_type<move, impl::move_base>();
 		register_type<button, impl::button_base>();
 		register_type<label, impl::label_base>();
+		register_type<floating, impl::floating_base>();
+		register_type<storage, impl::storage_base>();
 	}
 
 }
diff --git a/libs/ui/source/impl/floating_base.cpp b/libs/ui/source/impl/floating_base.cpp
new file mode 100644
index 00000000..eba71e26
--- /dev/null
+++ b/libs/ui/source/impl/floating_base.cpp
@@ -0,0 +1,49 @@
+#include <psemek/ui/impl/floating_base.hpp>
+#include <psemek/ui/alignment.hpp>
+#include <psemek/react/join.hpp>
+#include <psemek/react/map.hpp>
+
+namespace psemek::ui::impl
+{
+
+	namespace
+	{
+
+		geom::box<float, 2> compute_child_shape(geom::box<float, 2> const & size_constraints, geom::point<float, 2> const & anchor, halignment halign, valignment valign)
+		{
+			geom::vector size{size_constraints[0].min, size_constraints[1].min};
+
+			geom::box<float, 2> result;
+			result[0] = geom::interval{- size[0], 0.f} + (1.f - lerp_factor(halign)) * size[0] + anchor[0];
+			result[1] = geom::interval{- size[1], 0.f} + (1.f - lerp_factor(valign)) * size[1] + anchor[1];
+
+			return result;
+		}
+
+	}
+
+	floating_base::floating_base()
+		: size_constraints_(impl::size_constraints::max())
+	{}
+
+	void floating_base::reshape(geom::box<float, 2> const & new_shape)
+	{
+		single_container::reshape(new_shape);
+
+		if (auto child = this->child())
+			child->reshape(compute_child_shape((*(child->size_constraints())).box, *anchor_, *halign_, *valign_));
+	}
+
+	react::value<struct size_constraints> floating_base::size_constraints() const
+	{
+		return size_constraints_;
+	}
+
+	void floating_base::update(floating const & value)
+	{
+		anchor_ = value.anchor;
+		halign_ = value.halign;
+		valign_ = value.valign;
+	}
+
+}
diff --git a/libs/ui/source/impl/shape_reader_base.cpp b/libs/ui/source/impl/shape_reader_base.cpp
new file mode 100644
index 00000000..406b6d62
--- /dev/null
+++ b/libs/ui/source/impl/shape_reader_base.cpp
@@ -0,0 +1,35 @@
+#include <psemek/ui/impl/shape_reader_base.hpp>
+
+namespace psemek::ui::impl
+{
+
+	shape_reader_base::shape_reader_base()
+		: shape_(geom::box<float, 2>{{{0.f, 0.f}, {0.f, 0.f}}})
+	{}
+
+	void shape_reader_base::reshape(geom::box<float, 2> const & new_shape)
+	{
+		single_container::reshape(new_shape);
+
+		if (auto child = this->child())
+			child->reshape(new_shape);
+
+		shape_.set(new_shape);
+	}
+
+	react::value<struct size_constraints> shape_reader_base::size_constraints() const
+	{
+		if (auto child = this->child())
+			return child->size_constraints();
+
+		return size_constraints::max();
+	}
+
+	void shape_reader_base::update(shape_reader const & value)
+	{
+		shape_ = value.shape;
+
+		shape_.set(shape());
+	}
+
+}
diff --git a/libs/ui/source/impl/storage_base.cpp b/libs/ui/source/impl/storage_base.cpp
new file mode 100644
index 00000000..50fa51c0
--- /dev/null
+++ b/libs/ui/source/impl/storage_base.cpp
@@ -0,0 +1,59 @@
+#include <psemek/ui/impl/storage_base.hpp>
+
+#include <psemek/react/join.hpp>
+
+namespace psemek::ui::impl
+{
+
+	storage_base::storage_base()
+		: child_size_constraints_(size_constraints::max())
+		, size_constraints_(react::join(child_size_constraints_))
+	{}
+
+	void storage_base::reshape(geom::box<float, 2> const & new_shape)
+	{
+		single_container::reshape(new_shape);
+
+		if (auto child = this->child())
+			child->reshape(new_shape);
+	}
+
+	react::value<struct size_constraints> storage_base::size_constraints() const
+	{
+		if (auto child = this->child())
+			return child->size_constraints();
+
+		return impl::size_constraints::max();
+	}
+
+	void storage_base::set_child(std::unique_ptr<component> child)
+	{
+		if (child)
+			child_size_constraints_.set(child->size_constraints());
+		else
+			child_size_constraints_.set(size_constraints::max());
+		single_container::set_child(std::move(child));
+	}
+
+	std::unique_ptr<component> storage_base::release_child()
+	{
+		child_size_constraints_.set(size_constraints::max());
+		return single_container::release_child();
+	}
+
+	void storage_base::update(storage const & value)
+	{
+		util::hash_map<std::string, react::source<std::any>> new_values;
+
+		for (auto const & p : value.values)
+		{
+			auto & v = (new_values[p.first] = p.second);
+
+			if (auto it = values_.find(p.first); it != values_.end())
+				v.set(*(it->second));
+		}
+
+		values_ = std::move(new_values);
+	}
+
+}