AFontFamily.h

/*
 * AUI Framework - Declarative UI toolkit for modern C++20
 * Copyright (C) 2020-2024 Alex2772 and Contributors
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
#pragma once
 
 
#include <AUI/Common/AMap.h>
 
class AFont;
 
class AFontFamily {
public:
    enum Weight {
        W100,
        W200,
        W300,
        W400,
        W500,
        W600,
        W700,
        W800,
        W900,
        NORMAL = W400,
        BOLD   = W700,
    };
 
 
private:
    struct {
        _<AFont> nonItalic;
        _<AFont> italic;
    } mFonts[9]; // weights 100-900;
 
 
    template<bool italic>
    _<AFont> getEitherWeight() {
        for (auto& e : {
            W400,
            W500,
            W300,
            W600,
            W200,
            W700,
            W100,
            W800,
            W900
        }) {
            if (auto& f = get(NORMAL, italic)) {
                return f;
            }
        }
        return nullptr;
    }
    template<bool italicPrefer>
    _<AFont> getEitherWeightItalicPreferred() {
        if (auto f = getEitherWeight<italicPrefer>()) {
            return f;
        }
        return getEitherWeight<!italicPrefer>();
    }
 
public:
    _<AFont>& get(Weight weight, bool isItalic) {
        auto& r = mFonts[weight];
        return isItalic ? r.italic : r.nonItalic;
    }
 
    _<AFont> getEither(bool italicPreferred = false) {
        if (italicPreferred) {
            return getEitherWeightItalicPreferred<true>();
        }
        return getEitherWeightItalicPreferred<false>();
    }
};