Add helpers to setup Selenite in C++ projects

components/Palette.slint

@@ -29,15 +29,15 @@
 // ----
 
 export global Palette {
-	out property<brush> accent: Colors.cyan.darker(0.4);
-	out property<brush> foreground: #abb2bf;
-	out property<brush> foreground-hint: foreground.darker(0.2);
-	out property<brush> background: #282c34;
-	out property<brush> pane: #21252b;
-	out property<brush> control-foreground: #abb2bf;
-	out property<brush> control-background: #393f4a;
-	out property<brush> card-background: background.brighter(0.2);
-	out property<brush> green: Colors.greenyellow;
-	out property<brush> orange: Colors.orange;
-	out property<brush> red: Colors.red;
+	in-out property<brush> accent: Colors.cyan.darker(0.4);
+	in-out property<brush> foreground: #abb2bf;
+	in-out property<brush> foreground-hint: foreground.darker(0.2);
+	in-out property<brush> background: #282c34;
+	in-out property<brush> pane: #21252b;
+	in-out property<brush> control-foreground: #abb2bf;
+	in-out property<brush> control-background: #393f4a;
+	in-out property<brush> card-background: background.brighter(0.2);
+	in-out property<brush> green: Colors.greenyellow;
+	in-out property<brush> orange: Colors.orange;
+	in-out property<brush> red: Colors.red;
 }

cpp/CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.21)
+project(selenite LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+set(CMAKE_COMPILE_WARNING_AS_ERROR ON)
+set(CMAKE_BUILD_RPATH_USE_ORIGIN ON)
+
+add_library(selenite
+	src/palette.cpp
+)
+
+target_include_directories(selenite PRIVATE "include")

cpp/include/selenite/palette.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <optional>
+#include <string>
+
+namespace selenite
+{
+struct Color {
+	int r, g, b;
+	std::string hex;
+};
+
+struct Palette {
+	Color primary;
+	Color secondary;
+	Color background;
+	Color background2;
+	Color background3;
+	Color background4;
+	Color pane;
+	Color foreground;
+	Color foregroundHint;
+};
+
+std::optional<Palette> parseJson(const std::string &path);
+
+} // namespace selenite

cpp/include/selenite/selenite.h

@@ -0,0 +1,2 @@
+#pragma once
+#include "palette.h"

cpp/src/palette.cpp

@@ -0,0 +1,50 @@
+#include "selenite/palette.h"
+#include "json.hpp"
+#include <fstream>
+#include <optional>
+#include <string>
+
+namespace selenite
+{
+Color hexStringToColor(const std::string &hexString)
+{
+	int r, g, b;
+	std::sscanf(hexString.c_str(), "#%02x%02x%02x", &r, &g, &b);
+	return {
+		.r = r,
+		.g = g,
+		.b = b,
+		.hex = hexString,
+	};
+}
+
+std::optional<Palette> parseJson(const std::string &path)
+{
+	std::ifstream file(path);
+	if (!file) {
+		return std::nullopt;
+	}
+	auto json = nlohmann::json::parse(file);
+
+	if (!json.is_object() || !json["primary"].is_string() || !json["secondary"].is_string() ||
+		!json["background"].is_string() || !json["background2"].is_string() ||
+		!json["background4"].is_string() || !json["background3"].is_string() ||
+		!json["pane"].is_string() || !json["foreground"].is_string() ||
+		!json["foregroundHint"].is_string()) {
+		return std::nullopt;
+	}
+
+	Palette palette{
+		.primary = hexStringToColor(json["primary"].get<std::string>()),
+		.secondary = hexStringToColor(json["secondary"].get<std::string>()),
+		.background = hexStringToColor(json["background"].get<std::string>()),
+		.background2 = hexStringToColor(json["background2"].get<std::string>()),
+		.background3 = hexStringToColor(json["background3"].get<std::string>()),
+		.background4 = hexStringToColor(json["background4"].get<std::string>()),
+		.pane = hexStringToColor(json["pane"].get<std::string>()),
+		.foreground = hexStringToColor(json["foreground"].get<std::string>()),
+		.foregroundHint = hexStringToColor(json["foregroundHint"].get<std::string>()),
+	};
+	return palette;
+}
+} // namespace selenite