From a4ac73529ed7311de94c97e6fe1ef46f984ea21e Mon Sep 17 00:00:00 2001
From: SimonFJ20 <simonfromjakobsen@gmail.com>
Date: Sun, 15 Jan 2023 20:45:52 +0100
Subject: [PATCH] some dom stuff

---
 .clangd                    |  1 +
 meson.build                |  4 +-
 src/dom.cpp                | 30 +++++++++++++
 src/dom.hpp                | 92 ++++++++++++++++++++++++++++++++++++++
 src/main.cpp               | 13 +-----
 src/{all.hpp => utils.hpp} |  0
 6 files changed, 126 insertions(+), 14 deletions(-)
 create mode 100644 src/dom.cpp
 create mode 100644 src/dom.hpp
 rename src/{all.hpp => utils.hpp} (100%)

diff --git a/.clangd b/.clangd
index 2d53df1..7c6ddb1 100644
--- a/.clangd
+++ b/.clangd
@@ -19,6 +19,7 @@ Diagnostics:
   
     CheckOptions:
       UnusedIncludes: Strict
+      cppcoreguidelines-special-member-functions.AllowSoleDefaultDtor: true
 
       # typecase rules
       readability-identifier-naming.ClassCase: CamelCase
diff --git a/meson.build b/meson.build
index 420d375..2941d51 100644
--- a/meson.build
+++ b/meson.build
@@ -17,10 +17,10 @@ add_project_arguments(
 )
 
 sources = []
-subdir('browser')
+subdir('src')
 
 executable(
-    'web-browser',
+    'browser',
     sources,
     win_subsystem: 'console',
     include_directories: [],
diff --git a/src/dom.cpp b/src/dom.cpp
new file mode 100644
index 0000000..c31896d
--- /dev/null
+++ b/src/dom.cpp
@@ -0,0 +1,30 @@
+#include "dom.hpp"
+
+namespace dom {
+
+auto Box::size() const noexcept -> Size
+{
+    auto new_size = Size {};
+    for (const auto& child : children)
+        new_size += child->size() + Size { 5, 5 };
+    new_size += { 5, 5 };
+    return new_size;
+}
+
+auto Box::render(Renderer& renderer, Position position) const noexcept -> void
+{
+    renderer.draw_rectangle(position, size(), color);
+    auto child_position = position + Position { 5, 5 };
+    for (const auto& child : children) {
+        child->render(renderer, child_position);
+        child_position.y += child->size().height + 5;
+    }
+}
+
+auto Rectangle::render(Renderer& renderer, Position position) const noexcept
+    -> void
+{
+    renderer.draw_rectangle(position, size(), color);
+}
+
+}
diff --git a/src/dom.hpp b/src/dom.hpp
new file mode 100644
index 0000000..0f4c533
--- /dev/null
+++ b/src/dom.hpp
@@ -0,0 +1,92 @@
+#pragma once
+
+#include <cstdint>
+#include <memory>
+#include <vector>
+
+namespace dom {
+
+template <typename T> using Ref = std::shared_ptr<T>;
+
+struct Position {
+    auto operator+=(const Position& other) noexcept -> Position&
+    {
+        x += other.x;
+        y += other.y;
+        return *this;
+    }
+    int x, y;
+};
+
+auto operator+(const Position& a, const Position& b) noexcept -> Position
+{
+    return { a.x + b.x, a.y + b.y };
+}
+
+struct Size {
+    auto operator+=(const Size& other) noexcept -> Size&
+    {
+        width += other.width;
+        height += other.height;
+        return *this;
+    }
+    friend auto operator+(const Size& a, const Size& b) noexcept -> Size;
+
+    int width, height;
+};
+
+auto operator+(const Size& a, const Size& b) noexcept -> Size
+{
+    return { a.width + b.width, a.height + b.height };
+}
+
+struct Color {
+    static const auto opaque = uint8_t { 255 };
+    static const auto transparent = uint8_t { 0 };
+
+    uint8_t red, green, blue, alpha { opaque };
+};
+
+struct Renderer {
+    Renderer() = default;
+    virtual ~Renderer() = default;
+    virtual auto draw_rectangle(
+        Position position, Size size, Color color) const noexcept -> void
+        = 0;
+};
+
+struct Element {
+    Element() = default;
+    virtual ~Element() = default;
+    [[nodiscard]] virtual auto size() const noexcept -> Size = 0;
+    virtual auto render(Renderer& renderer, Position position) const noexcept
+        -> void
+        = 0;
+};
+
+struct Box final : public Element {
+    [[nodiscard]] auto size() const noexcept -> Size override;
+    auto render(Renderer& renderer, Position position) const noexcept
+        -> void override;
+    auto add_child(Ref<Element> element) noexcept
+    {
+        children.push_back(element);
+    }
+
+    std::vector<Ref<Element>> children;
+    Color color {};
+};
+
+struct Rectangle final : public Element {
+    Rectangle(Size size)
+        : m_size { size }
+    { }
+    [[nodiscard]] auto size() const noexcept -> Size override { return m_size; }
+    auto render(Renderer& renderer, Position position) const noexcept
+        -> void override;
+
+    Color color {};
+    Size m_size { 50, 50 };
+};
+
+}
diff --git a/src/main.cpp b/src/main.cpp
index 562e092..0486dce 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3,8 +3,7 @@
 #include "SDL_rect.h"
 #include "SDL_render.h"
 #include "SDL_video.h"
-#include "scriptlang/parser.hpp"
-#include "utils/all.hpp"
+#include "utils.hpp"
 #include <SDL.h>
 #include <fmt/core.h>
 #include <memory>
@@ -70,16 +69,6 @@ private:
 auto main() -> int
 {
 
-    const auto* text = "{name: \"test\", value: [true, false, 123, \"bruh\"], "
-                       "int: 123, float: 3.14}";
-    auto ast = scriptlang::Parser(text).parse_expression(true);
-    if (!ast)
-        fmt::print("parser error at {}:{}: {}\n\t\n",
-            ast.unwrap_error().span.from.line,
-            ast.unwrap_error().span.from.column, ast.unwrap_error().message);
-    else
-        fmt::print("ast = {}\n", ast.unwrap()->to_string());
-
     // test
     fmt::print("browser: hello world!\n");
     auto gui = GUI::create().unwrap();
diff --git a/src/all.hpp b/src/utils.hpp
similarity index 100%
rename from src/all.hpp
rename to src/utils.hpp