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InputOwnershipRequest

Enum InputOwnershipRequest 

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pub enum InputOwnershipRequest {
    GetEvent {
        target: InputOwnershipTarget,
        responder: InputOwnershipGetEventResponder,
    },
}
Expand description

Get information about ownership of input (replaces DisplayOwnership).

By default, user input is handled by the platform input pipeline (SceneManager) and delivered to applications via standard UI protocols (e.g. fuchsia.ui.pointer.TouchSource).

Low-level components (such as Starnix or Virtcon) that require direct access to hardware input devices via fuchsia.input.report.Service must observe this event to pause or resume reading from direct driver streams, preventing duplicate processing or input leakage.

This protocol intentionally assumes a system-wide singleton direct-client model where only one direct client or the platform pipeline consumes input at any given time.

During ownership transitions (e.g. switching display ownership or view focus), an intermediate state may occur where neither the direct client nor the platform pipeline owns input. During any unowned or transition state, all consumers (both direct clients and the platform pipeline) must pause reading and processing hardware input reports until their respective ownership signal is asserted.

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GetEvent

Gets a duplicate handle to the shared kernel ownership_event whose orthogonal signals inform clients and the system pipeline when direct driver input access (fuchsia.input.report.Service) is granted or revoked:

  • Virtcon (target = virtcon: {}): owns input iff InputOwnershipSignal.DISPLAY_UNOWNED is asserted.
  • Starnix (target = view_ref): owns direct input iff both InputOwnershipSignal.DISPLAY_PLATFORM_OWNED and InputOwnershipSignal.INPUT_CLIENT_OWNED are asserted.
  • SceneManager (target = platform: {}): owns platform pipeline input iff both InputOwnershipSignal.DISPLAY_PLATFORM_OWNED and InputOwnershipSignal.INPUT_PLATFORM_OWNED are asserted (pauses whenever DISPLAY_UNOWNED or INPUT_CLIENT_OWNED is asserted).

If target is set to an unsupported or unknown variant, the call returns InputOwnershipError.INVALID_TARGET.

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impl InputOwnershipRequest

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pub fn into_get_event( self, ) -> Option<(InputOwnershipTarget, InputOwnershipGetEventResponder)>

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pub fn method_name(&self) -> &'static str

Name of the method defined in FIDL

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impl Debug for InputOwnershipRequest

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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