Import of the watch repository from Pebble

src/fw/applib/app_light.h

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+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+
+//! @file light.h
+//! @addtogroup UI
+//! @{
+//!   @addtogroup Light Light
+//! \brief Controlling Pebble's backlight
+//!
+//! The Light API provides you with functions to turn on Pebble’s backlight or
+//! put it back into automatic control. You can trigger the backlight and schedule a timer
+//! to automatically disable the backlight after a short delay, which is the preferred
+//! method of interacting with the backlight.
+//!   @{
+
+//! Trigger the backlight and schedule a timer to automatically disable the backlight
+//! after a short delay. This is the preferred method of interacting with the backlight.
+void app_light_enable_interaction(void);
+
+//! Turn the watch's backlight on or put it back into automatic control.
+//! Developers should take care when calling this function, keeping Pebble's backlight on for long periods of time
+//! will rapidly deplete the battery.
+//! @param enable Turn the backlight on if `true`, otherwise `false` to put it back into automatic control.
+void app_light_enable(bool enable);
+
+//!   @} // group Light
+//! @} // group UI