feat: add font builder

plugin/src/Caelestia/Config/CMakeLists.txt

@@ -6,6 +6,7 @@ qml_module(caelestia-config
         configobject.cpp
         rootconfig.cpp
         appearanceconfig.cpp
+        fontbuilder.cpp
         tokens.cpp
         tokensattached.cpp
         anim.cpp

plugin/src/Caelestia/Config/fontbuilder.cpp

@@ -0,0 +1,42 @@
+#include "fontbuilder.hpp"
+
+#include <qcoreapplication.h>
+#include <qmetatype.h>
+
+namespace caelestia::config {
+
+FontBuilder::FontBuilder(QFont font)
+    : m_font(std::move(font)) {}
+
+FontBuilder FontBuilder::family(const QString& family) {
+    m_font.setFamily(family);
+    return *this;
+}
+
+FontBuilder FontBuilder::size(int pointSize) {
+    m_font.setPointSize(pointSize);
+    m_font.setVariableAxis("opsz", static_cast<float>(pointSize));
+    return *this;
+}
+
+FontBuilder FontBuilder::weight(QFont::Weight weight) {
+    m_font.setWeight(weight);
+    m_font.setVariableAxis("wght", weight);
+    return *this;
+}
+
+FontBuilder FontBuilder::italic(bool on) {
+    m_font.setItalic(on);
+    return *this;
+}
+
+FontBuilder FontBuilder::vaxis(QFont::Tag tag, float value) {
+    m_font.setVariableAxis(tag, value);
+    return *this;
+}
+
+QFont FontBuilder::build() const {
+    return m_font;
+}
+
+} // namespace caelestia::config

plugin/src/Caelestia/Config/fontbuilder.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <qfont.h>
+#include <qqmlintegration.h>
+
+namespace caelestia::config {
+
+class FontBuilder {
+    Q_GADGET
+    QML_ANONYMOUS
+
+public:
+    FontBuilder() = default;
+    explicit FontBuilder(QFont font);
+
+    [[nodiscard]] Q_INVOKABLE FontBuilder family(const QString& family);
+    [[nodiscard]] Q_INVOKABLE FontBuilder size(int pointSize);
+    [[nodiscard]] Q_INVOKABLE FontBuilder weight(QFont::Weight weight);
+    [[nodiscard]] Q_INVOKABLE FontBuilder italic(bool on = true);
+    [[nodiscard]] Q_INVOKABLE FontBuilder vaxis(QFont::Tag tag, float value);
+    [[nodiscard]] Q_INVOKABLE QFont build() const;
+
+private:
+    QFont m_font;
+};
+
+} // namespace caelestia::config