RAGS - v1.11.0
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    Class Battery

    Battery Service

    Provides battery status information via UPower DBus interface.

    Lifecycle:

    1. Construction - Connect to UPower device
    2. Ready - Monitor battery state changes
    3. Disposal - Cleanup signal connections

    changed - Emitted when any battery property changes

    Hierarchy (View Summary)

    Implements

    Index

    Accessors

    available charged charging energy energy_full energy_rate icon_name isDisposed percent time_remaining

    Constructors

    constructor

    Methods

    bind changed connect diffBind disconnectAll dispose emit retryWithBackoff trackConnection updateProperty import pspec register

    Accessors

    • get available(): boolean

      Whether a battery device is present in the system.

      Returns boolean

    • get icon_name(): string

      Symbolic icon name reflecting current battery level and charge state.

      Returns string

    • get isDisposed(): boolean

      Check if service has been disposed

      Returns boolean

    Constructors

    Methods

    • Creates a Binding for a property on this service.

      Type Parameters

      • Prop extends
            | "icon_name"
            | "isDisposed"
            | "$signals"
            | "available"
            | "percent"
            | "charging"
            | "charged"
            | "time_remaining"
            | "energy"
            | "energy_full"
            | "energy_rate"

      Parameters

      • prop: Prop

        The property to bind

      Returns Binding<Battery, Prop, Battery[Prop]>

      A Binding that can be used in widget constructors

      const label = Widget.Label({
          label: audio.bind('volume').as(v => `${Math.round(v * 100)}%`),
      });

    • Notifies listeners that a property changed and emits the 'changed' signal.

      Parameters

      • property: string

        The property name that changed

      Returns void

    • Connects a callback to a signal on this service.

      Parameters

      • signal: string = 'changed'

        The signal name (defaults to 'changed')

      • callback: (_: this, ...args: any[]) => void

        The callback to invoke when the signal is emitted

      Returns number

      The signal connection ID

    • Creates an incremental list binding that reuses existing widgets.

      Instead of recreating all widgets on every update, this method caches widgets by a key function and only creates new widgets for new items, destroying widgets for removed items.

      Type Parameters

      • Item
      • Prop extends
            | "icon_name"
            | "isDisposed"
            | "$signals"
            | "available"
            | "percent"
            | "charging"
            | "charged"
            | "time_remaining"
            | "energy"
            | "energy_full"
            | "energy_rate"

      Parameters

      • prop: Prop

        The property containing the item array

      • opts: {
            create: (item: Item) => Widget;
            key: (item: Item) => string | number;
            update?: (widget: Widget, item: Item) => void;
        }

        Key extractor, widget factory, and optional update callback

      Returns Binding<Battery, Prop, Widget[]>

      A Binding that produces an array of widgets

      const children = audio.diffBind('speakers', {
          key: (s) => s.name,
          create: (s) => Widget.Label({ label: s.description }),
          update: (w, s) => { w.label = s.description; },
      });

    • Clean up all tracked signal connections Call this in service-specific dispose implementations

      Returns void

    • Emits a signal, warning if the signal was not registered via Service.register.

      The warning is cheap (a Set lookup per emit) and helps catch typos and missing signal declarations that silently break .bind().

      Parameters

      • signal: string
      • ...args: any[]

      Returns void

    • Retry a DBus operation with exponential backoff

      Type Parameters

      • T

      Parameters

      • operation: () => Promise<T>
      • maxRetries: number = 3
      • baseDelay: number = 100

      Returns Promise<T>

    • Track a signal connection for automatic cleanup

      Parameters

      • emitter: Object

        The object the signal is connected to (defaults to this)

      • id: number

        The signal connection ID

      Returns void

    • Track a signal connection for automatic cleanup

      Parameters

      • id: number

        The signal connection ID

      Returns void

    • Updates a property value and emits a notify signal if the value changed.

      Performs a deep equality check via JSON serialization to avoid unnecessary notifications.

      Parameters

      • prop: string

        The property name in kebab-case

      • value: unknown

        The new value

      Returns void

    • Dynamically imports a built-in service by name.

      Type Parameters

      • S extends keyof Services

      Parameters

      • service: S

        The service name to import

      Returns Promise<Services[S]>

      The default export of the service module

      const Audio = await Service.import('audio');
      const Battery = await Service.import('battery');

    • Creates a GObject property specification.

      Parameters

      • name: string

        The property name in kebab-case

      • type: PspecType = 'jsobject'

        The property type (defaults to 'jsobject')

      • handle: PspecFlag = 'r'

        The access flag: 'r', 'w', or 'rw' (defaults to 'r')

      Returns ParamSpec<unknown>

      A GObject.ParamSpec

    • Registers a GObject subclass with signals and properties.

      Parameters

      • service: new (...args: any[]) => Object

        The class constructor to register

      • Optionalsignals: { [signal: string]: PspecType[] }

        Map of signal names to their parameter types

      • Optionalproperties: { [prop: string]: [type?: PspecType, handle?: PspecFlag] }

        Map of property names to [type, accessFlag] tuples

      Returns void

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