9 files changed, 246 insertions, 0 deletions
diff --git a/mbuoy/attr/dimensions.hpp b/mbuoy/attr/dimensions.hpp
new file mode 100644
index 0000000..9c1fda9
--- /dev/null
+++ b/mbuoy/attr/dimensions.hpp
@@ -0,0 +1,14 @@
+#ifndef MBUOY_ATTR_DIMENSIONS_HPP
+#define MBUOY_ATTR_DIMENSIONS_HPP
+
+namespace mbuoy {
+
+struct dimensions
+{
+    int width, height;
+};
+
+} // namespace mbuoy
+
+#endif // MBUOY_ATTR_DIMENSIONS_HPP
+
diff --git a/mbuoy/attr/ondraw.hpp b/mbuoy/attr/ondraw.hpp
new file mode 100644
index 0000000..d0932ef
--- /dev/null
+++ b/mbuoy/attr/ondraw.hpp
@@ -0,0 +1,21 @@
+#ifndef MBUOY_ATTR_ONDRAW_HPP
+#define MBUOY_ATTR_ONDRAW_HPP
+
+#include "position.hpp"
+#include "dimensions.hpp"
+
+namespace mbuoy {
+
+struct ondraw
+{
+    void (*func)(const position&, const dimensions&);
+
+    void operator()(const position& pos, const dimensions& dim) const noexcept {
+        func(pos, dim);
+    }
+};
+
+} // namespace mbuoy
+
+#endif // MBUOY_ATTR_ONDRAW_HPP
+
diff --git a/mbuoy/attr/position.hpp b/mbuoy/attr/position.hpp
new file mode 100644
index 0000000..dfb9cc7
--- /dev/null
+++ b/mbuoy/attr/position.hpp
@@ -0,0 +1,14 @@
+#ifndef MBUOY_ATTR_POSITION_HPP
+#define MBUOY_ATTR_POSITION_HPP
+
+namespace mbuoy {
+
+struct position
+{
+    int x, y;
+};
+
+} // namespace mbuoy
+
+#endif // MBUOY_ATTR_POSITION_HPP
+
diff --git a/mbuoy/attr/string.hpp b/mbuoy/attr/string.hpp
new file mode 100644
index 0000000..d7e1fcb
--- /dev/null
+++ b/mbuoy/attr/string.hpp
@@ -0,0 +1,24 @@
+#ifndef MBUOY_ATTR_STRING_HPP
+#define MBUOY_ATTR_STRING_HPP
+
+namespace mbuoy {
+
+template<int N>
+struct string
+{
+    consteval string(const char (&s_)[N]) {
+        for (int i = 0; i < N; ++i)
+            s[i] = s_[i];
+    }
+
+    consteval operator const char *() const {
+        return s;
+    }
+
+    char s[N];
+};
+
+} // namespace mbuoy
+
+#endif // MBUOY_ATTR_STRING_HPP
+
diff --git a/mbuoy/find.hpp b/mbuoy/find.hpp
new file mode 100644
index 0000000..edba06d
--- /dev/null
+++ b/mbuoy/find.hpp
@@ -0,0 +1,57 @@
+#ifndef MBUOY_FIND_HPP
+#define MBUOY_FIND_HPP
+
+#include <optional>
+#include <type_traits>
+
+namespace mbuoy {
+
+template<typename T, typename U>
+concept can_static_cast = requires(U u) {
+    static_cast<T>(u);
+};
+
+template<typename T>
+consteval std::optional<T> find(T val)
+{
+    return val;
+}
+
+template<typename T, typename U>
+    requires (!std::is_same_v<T, U> && can_static_cast<T, U>)
+consteval std::optional<U> find(U val)
+{
+    return val;
+}
+
+template<typename T, typename U>
+    requires (!std::is_same_v<T, U> && !can_static_cast<T, U>)
+consteval std::optional<T> find(U val)
+{
+    return {};
+}
+
+template<typename T>
+consteval std::optional<T> find(T val, auto... vals)
+{
+    return val;
+}
+
+template<typename T, typename U>
+    requires (!std::is_same_v<T, U> && can_static_cast<T, U>)
+consteval std::optional<U> find(U val, auto... vals)
+{
+    return val;
+}
+
+template<typename T, typename U>
+    requires (!std::is_same_v<T, U> && !can_static_cast<T, U>)
+consteval auto find(U val, auto... vals)
+{
+    return find<T>(vals...);
+}
+
+} // namespace mbuoy
+
+#endif // MBUOY_FIND_HPP
+
diff --git a/mbuoy/port.hpp b/mbuoy/port.hpp
new file mode 100644
index 0000000..366f498
--- /dev/null
+++ b/mbuoy/port.hpp
@@ -0,0 +1,18 @@
+#ifndef MBUOY_PORT_HPP
+#define MBUOY_PORT_HPP
+
+#include <cstdio>
+
+namespace mbuoy {
+namespace port {
+
+inline void puts(int x, int y, const char *s)
+{
+    std::printf("[%d, %d]: %s\n", x, y, s);
+}
+
+} // namespace port
+} // namespace mbuoy
+
+#endif // MBUOY_PORT_HPP
+
diff --git a/mbuoy/ui/button.hpp b/mbuoy/ui/button.hpp
new file mode 100644
index 0000000..c6e5b66
--- /dev/null
+++ b/mbuoy/ui/button.hpp
@@ -0,0 +1,37 @@
+#ifndef MBUOY_UI_BUTTON_HPP
+#define MBUOY_UI_BUTTON_HPP
+
+#include "../attr/dimensions.hpp"
+#include "../attr/ondraw.hpp"
+#include "../attr/position.hpp"
+#include "../attr/string.hpp"
+#include "../find.hpp"
+#include "../port.hpp"
+
+namespace mbuoy {
+
+template<auto... Attr>
+struct button
+{
+    static constexpr auto point = find<position>(Attr...);
+    static constexpr auto dims = find<dimensions>(Attr...);
+    static constexpr auto text = find<const char *>(Attr...);
+    static constexpr auto draw = find<ondraw>(Attr...);
+
+    static consteval void init(unsigned char *(&ptr)) {
+        *ptr++ = 0; // pressed?
+    }
+
+    static void render() {
+        (*draw)(*point, *dims);
+    }
+
+    static consteval int size() {
+        return 1;
+    }
+};
+
+} // namespace mbuoy
+
+#endif // MBUOY_UI_BUTTON_HPP
+
diff --git a/mbuoy/ui/label.hpp b/mbuoy/ui/label.hpp
new file mode 100644
index 0000000..c6cc581
--- /dev/null
+++ b/mbuoy/ui/label.hpp
@@ -0,0 +1,32 @@
+#ifndef MBUOY_UI_LABEL_HPP
+#define MBUOY_UI_LABEL_HPP
+
+#include "../attr/position.hpp"
+#include "../attr/string.hpp"
+#include "../find.hpp"
+#include "../port.hpp"
+
+namespace mbuoy {
+
+template<auto... Attr>
+struct label
+{
+    static constexpr auto point = find<position>(Attr...);
+    static constexpr auto text = find<const char *>(Attr...);
+
+    static consteval void init(unsigned char *(&ptr)) {
+    }
+
+    static void render() {
+        port::puts(point->x, point->y, *text);
+    }
+
+    static consteval int size() {
+        return 0;
+    }
+};
+
+} // namespace mbuoy
+
+#endif // MBUOY_UI_LABEL_HPP
+
diff --git a/mbuoy/view.hpp b/mbuoy/view.hpp
new file mode 100644
index 0000000..29915fd
--- /dev/null
+++ b/mbuoy/view.hpp
@@ -0,0 +1,29 @@
+#ifndef MBUOY_VIEW_HPP
+#define MBUOY_VIEW_HPP
+
+namespace mbuoy {
+
+template<auto... Objs>
+class view_t
+{
+public:
+    consteval view_t() {
+        auto ptr = data;
+        (Objs.init(ptr), ...);
+    }
+
+    void render() {
+        (Objs.render(), ...);
+    }
+
+private:
+    unsigned char data[(0 + ... + Objs.size())] = {};
+};
+
+template<auto... Objs>
+constinit auto view = view_t<Objs...>();
+
+} // namespace mbuoy
+
+#endif // MBUOY_VIEW_HPP
+