Tactility/Devices/m5stack-tab5/Source/devices/tab5_keyboard_lvgl_rotation.cpp

#include "tab5_keyboard_lvgl_rotation.h"

#include <tactility/device.h>
#include <tactility/device_listener.h>

#include <lvgl/lvgl.h>
#include <lvgl.h>

static lv_display_rotation_t saved_rotation = LV_DISPLAY_ROTATION_0;
static bool rotation_override_active = false;

static void apply_rotation(bool attached) {
    lvgl_lock();

    auto* display = lv_display_get_default();
    if (display == nullptr) {
        lvgl_unlock();
        return;
    }

    if (attached) {
        if (lv_display_get_rotation(display) != LV_DISPLAY_ROTATION_90) {
            saved_rotation = lv_display_get_rotation(display);
            rotation_override_active = true;
            lv_display_set_rotation(display, LV_DISPLAY_ROTATION_90);
        }
    } else if (rotation_override_active && lv_display_get_rotation(display) == LV_DISPLAY_ROTATION_90) {
        lv_display_set_rotation(display, saved_rotation);
        rotation_override_active = false;
    }

    lvgl_unlock();
}

static void on_device_event(Device* device, DeviceEvent event, void*) {
    if (!device_is_compatible(device, "m5stack,tab5-keyboard")) {
        return;
    }
    if (event == DEVICE_EVENT_STARTED) {
        apply_rotation(true);
    } else if (event == DEVICE_EVENT_STOPPED) {
        apply_rotation(false);
    }
}

void tab5_keyboard_lvgl_rotation_start() {
    rotation_override_active = false;
    device_listener_add(on_device_event, nullptr);
}

void tab5_keyboard_lvgl_rotation_stop() {
    device_listener_remove(on_device_event);
}