Remove appbase as an external dependency.

lib/appbase/singletons/Fonts.hpp

@@ -0,0 +1,92 @@
+#pragma once
+
+#include "common/ChatterinoSetting.hpp"
+#include "common/Singleton.hpp"
+
+#include <QFont>
+#include <QFontDatabase>
+#include <QFontMetrics>
+#include <boost/noncopyable.hpp>
+#include <pajlada/signals/signal.hpp>
+
+#include <array>
+#include <unordered_map>
+
+namespace AB_NAMESPACE {
+
+class Settings;
+class Paths;
+
+enum class FontStyle : uint8_t {
+    Tiny,
+    ChatSmall,
+    ChatMediumSmall,
+    ChatMedium,
+    ChatMediumBold,
+    ChatMediumItalic,
+    ChatLarge,
+    ChatVeryLarge,
+
+    UiMedium,
+    UiTabs,
+
+    // don't remove this value
+    EndType,
+
+    // make sure to update these values accordingly!
+    ChatStart = ChatSmall,
+    ChatEnd = ChatVeryLarge,
+};
+
+class Fonts final : public Singleton
+{
+public:
+    Fonts();
+
+    virtual void initialize(Settings &settings, Paths &paths) override;
+
+    // font data gets set in createFontData(...)
+
+    QFont getFont(FontStyle type, float scale);
+    QFontMetrics getFontMetrics(FontStyle type, float scale);
+
+    QStringSetting chatFontFamily;
+    IntSetting chatFontSize;
+
+    pajlada::Signals::NoArgSignal fontChanged;
+    static Fonts *instance;
+
+private:
+    struct FontData {
+        FontData(const QFont &_font)
+            : font(_font)
+            , metrics(_font)
+        {
+        }
+
+        const QFont font;
+        const QFontMetrics metrics;
+    };
+
+    struct ChatFontData {
+        float scale;
+        bool italic;
+        QFont::Weight weight;
+    };
+
+    struct UiFontData {
+        float size;
+        const char *name;
+        bool italic;
+        QFont::Weight weight;
+    };
+
+    FontData &getOrCreateFontData(FontStyle type, float scale);
+    FontData createFontData(FontStyle type, float scale);
+
+    std::vector<std::unordered_map<float, FontData>> fontsByType_;
+};
+
+Fonts *getFonts();
+
+}  // namespace AB_NAMESPACE