Libraries: Create top level directory for libraries.

Things were getting a little crowded in the project root, so this patch
moves the Lib*/ directories into Libraries/.

Libraries/LibGUI/GVariant.h

@@ -0,0 +1,208 @@
+#pragma once
+
+#include <AK/AKString.h>
+#include <LibGUI/GIcon.h>
+#include <SharedGraphics/GraphicsBitmap.h>
+
+namespace AK {
+class JsonValue;
+}
+
+class GVariant {
+public:
+    GVariant();
+    GVariant(bool);
+    GVariant(float);
+    GVariant(int);
+    GVariant(const char*);
+    GVariant(const String&);
+    GVariant(const GraphicsBitmap&);
+    GVariant(const GIcon&);
+    GVariant(const Point&);
+    GVariant(const Size&);
+    GVariant(const Rect&);
+    GVariant(const AK::JsonValue&);
+    GVariant(Color);
+
+    GVariant(const GVariant&);
+    GVariant& operator=(const GVariant&);
+
+    GVariant(GVariant&&) = delete;
+    GVariant& operator=(GVariant&&);
+
+    void clear();
+    ~GVariant();
+
+    enum class Type {
+        Invalid,
+        Bool,
+        Int,
+        Float,
+        String,
+        Bitmap,
+        Color,
+        Icon,
+        Point,
+        Size,
+        Rect,
+    };
+
+    bool is_valid() const { return m_type != Type::Invalid; }
+    bool is_bool() const { return m_type == Type::Bool; }
+    bool is_int() const { return m_type == Type::Int; }
+    bool is_float() const { return m_type == Type::Float; }
+    bool is_string() const { return m_type == Type::String; }
+    bool is_bitmap() const { return m_type == Type::Bitmap; }
+    bool is_color() const { return m_type == Type::Color; }
+    bool is_icon() const { return m_type == Type::Icon; }
+    bool is_point() const { return m_type == Type::Point; }
+    bool is_size() const { return m_type == Type::Size; }
+    bool is_rect() const { return m_type == Type::Rect; }
+    Type type() const { return m_type; }
+
+    bool as_bool() const
+    {
+        ASSERT(type() == Type::Bool);
+        return m_value.as_bool;
+    }
+
+    bool to_bool() const
+    {
+        if (type() == Type::Bool)
+            return as_bool();
+        if (type() == Type::String)
+            return !!m_value.as_string;
+        if (type() == Type::Int)
+            return m_value.as_int != 0;
+        if (type() == Type::Rect)
+            return !as_rect().is_null();
+        if (type() == Type::Size)
+            return !as_size().is_null();
+        if (type() == Type::Point)
+            return !as_point().is_null();
+        return is_valid();
+    }
+
+    int as_int() const
+    {
+        ASSERT(type() == Type::Int);
+        return m_value.as_int;
+    }
+
+    int to_int() const
+    {
+        if (is_int())
+            return as_int();
+        if (is_bool())
+            return as_bool() ? 1 : 0;
+        if (is_float())
+            return (int)as_float();
+        if (is_string()) {
+            bool ok;
+            int value = as_string().to_int(ok);
+            if (!ok)
+                return 0;
+            return value;
+        }
+        return 0;
+    }
+
+    float as_float() const
+    {
+        ASSERT(type() == Type::Float);
+        return m_value.as_float;
+    }
+
+    Point as_point() const
+    {
+        return { m_value.as_point.x, m_value.as_point.y };
+    }
+
+    Size as_size() const
+    {
+        return { m_value.as_size.width, m_value.as_size.height };
+    }
+
+    Rect as_rect() const
+    {
+        return { as_point(), as_size() };
+    }
+
+    String as_string() const
+    {
+        ASSERT(type() == Type::String);
+        return m_value.as_string;
+    }
+
+    const GraphicsBitmap& as_bitmap() const
+    {
+        ASSERT(type() == Type::Bitmap);
+        return *m_value.as_bitmap;
+    }
+
+    GIcon as_icon() const
+    {
+        ASSERT(type() == Type::Icon);
+        return GIcon(*m_value.as_icon);
+    }
+
+    Color as_color() const
+    {
+        ASSERT(type() == Type::Color);
+        return Color::from_rgba(m_value.as_color);
+    }
+
+    Color to_color() const
+    {
+        if (is_color())
+            return as_color();
+        return Color();
+    }
+
+    Color to_color(Color default_value) const
+    {
+        if (type() == Type::Color)
+            return as_color();
+        return default_value;
+    }
+
+    String to_string() const;
+
+    bool operator==(const GVariant&) const;
+    bool operator<(const GVariant&) const;
+
+private:
+    void copy_from(const GVariant&);
+
+    struct RawPoint {
+        int x;
+        int y;
+    };
+
+    struct RawSize {
+        int width;
+        int height;
+    };
+
+    struct RawRect {
+        RawPoint location;
+        RawSize size;
+    };
+
+    union {
+        StringImpl* as_string;
+        GraphicsBitmap* as_bitmap;
+        GIconImpl* as_icon;
+        bool as_bool;
+        int as_int;
+        float as_float;
+        RGBA32 as_color;
+        RawPoint as_point;
+        RawSize as_size;
+        RawRect as_rect;
+    } m_value;
+
+    Type m_type { Type::Invalid };
+};
+
+const char* to_string(GVariant::Type);