iterance_divisor.h

/*
 * Copyright (c) 2014-2023 Synthstrom Audible Limited
 *
 * This file is part of The Synthstrom Audible Deluge Firmware.
 *
 * The Synthstrom Audible Deluge Firmware is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program.
 * If not, see <https://www.gnu.org/licenses/>.
 */
#pragma once
#include "gui/menu_item/integer.h"
#include "gui/menu_item/note/selected_note.h"
#include "gui/views/instrument_clip_view.h"
#include "model/clip/instrument_clip.h"
#include "model/note/note.h"
#include "model/note/note_row.h"
#include <cstdint>
 
namespace deluge::gui::menu_item::note {
class IteranceDivisor final : public SelectedNote {
public:
    using SelectedNote::SelectedNote;
 
    [[nodiscard]] int32_t getMaxValue() const override { return 8; }
    [[nodiscard]] int32_t getMinValue() const override { return 1; }

    void beginSession(MenuItem* navigatedBackwardFrom = nullptr) final override { readValueAgain(); }
 
    void readCurrentValue() override {
        Note* leftMostNote = instrumentClipView.getLeftMostNotePressed();
 
        if (leftMostNote) {
            Iterance iterance = leftMostNote->getIterance();
            if (iterance == kDefaultIteranceValue) {
                // if we end up here in this menu, convert OFF to the default CUSTOM value 1of1
                // so we can make edits from here
                iterance = kCustomIteranceValue;
            }
            int32_t divisor = iterance.divisor;
            this->setValue(std::clamp<int32_t>(divisor, 1, 8));
        }
    }
    void writeCurrentValue() override {
        int32_t val = this->getValue();
        Note* leftMostNote = instrumentClipView.getLeftMostNotePressed();
        if (leftMostNote) {
            Iterance iterance = leftMostNote->getIterance();
            if (iterance == kDefaultIteranceValue) {
                // if we end up here in this menu, convert OFF to the default CUSTOM value 1of1
                // so we can make edits from here
                iterance = kCustomIteranceValue;
            }
            int32_t mask = (1 << val) - 1; // Creates a mask where the first 'divisor' bits are 1
            // Wipe the bits whose index is greater than the current divisor value
            int32_t newIteranceSteps = ((iterance.toInt() & 0xFF) & mask);
            instrumentClipView.adjustNoteIteranceWithFinalValue(Iterance{(uint8_t)val, newIteranceSteps});
        }
    }
};
} // namespace deluge::gui::menu_item::note