fidl_fuchsia_ui_test_scene/

fidl_fuchsia_ui_test_scene.rs

// WARNING: This file is machine generated by fidlgen.

#![warn(clippy::all)]
#![allow(unused_parens, unused_mut, unused_imports, nonstandard_style)]

use bitflags::bitflags;
use fidl::client::QueryResponseFut;
use fidl::encoding::{MessageBufFor, ProxyChannelBox, ResourceDialect};
use fidl::endpoints::{ControlHandle as _, Responder as _};
pub use fidl_fuchsia_ui_test_scene__common::*;
use futures::future::{self, MaybeDone, TryFutureExt};
use zx_status;

#[derive(Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct ControllerRegisterViewTreeWatcherRequest {
    pub watcher:
        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker>,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect>
    for ControllerRegisterViewTreeWatcherRequest
{
}

#[derive(Debug, Default, PartialEq)]
pub struct ControllerAttachClientViewRequest {
    pub view_provider: Option<fidl::endpoints::ClientEnd<fidl_fuchsia_ui_app::ViewProviderMarker>>,
    #[doc(hidden)]
    pub __source_breaking: fidl::marker::SourceBreaking,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect>
    for ControllerAttachClientViewRequest
{
}

#[derive(Debug, Default, PartialEq)]
pub struct ControllerPresentClientViewRequest {
    pub viewport_creation_token: Option<fidl_fuchsia_ui_views::ViewportCreationToken>,
    #[doc(hidden)]
    pub __source_breaking: fidl::marker::SourceBreaking,
}

impl fidl::Standalone<fidl::encoding::DefaultFuchsiaResourceDialect>
    for ControllerPresentClientViewRequest
{
}

#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct ControllerMarker;

impl fidl::endpoints::ProtocolMarker for ControllerMarker {
    type Proxy = ControllerProxy;
    type RequestStream = ControllerRequestStream;
    #[cfg(target_os = "fuchsia")]
    type SynchronousProxy = ControllerSynchronousProxy;

    const DEBUG_NAME: &'static str = "fuchsia.ui.test.scene.Controller";
}
impl fidl::endpoints::DiscoverableProtocolMarker for ControllerMarker {}

pub trait ControllerProxyInterface: Send + Sync {
    type AttachClientViewResponseFut: std::future::Future<Output = Result<u64, fidl::Error>> + Send;
    fn r#attach_client_view(
        &self,
        payload: ControllerAttachClientViewRequest,
    ) -> Self::AttachClientViewResponseFut;
    fn r#present_client_view(
        &self,
        payload: ControllerPresentClientViewRequest,
    ) -> Result<(), fidl::Error>;
    type RegisterViewTreeWatcherResponseFut: std::future::Future<Output = Result<(), fidl::Error>>
        + Send;
    fn r#register_view_tree_watcher(
        &self,
        watcher: fidl::endpoints::ServerEnd<
            fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
        >,
    ) -> Self::RegisterViewTreeWatcherResponseFut;
    type WatchViewPresentationResponseFut: std::future::Future<Output = Result<(), fidl::Error>>
        + Send;
    fn r#watch_view_presentation(&self) -> Self::WatchViewPresentationResponseFut;
}
#[derive(Debug)]
#[cfg(target_os = "fuchsia")]
pub struct ControllerSynchronousProxy {
    client: fidl::client::sync::Client,
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::SynchronousProxy for ControllerSynchronousProxy {
    type Proxy = ControllerProxy;
    type Protocol = ControllerMarker;

    fn from_channel(inner: fidl::Channel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    fn as_channel(&self) -> &fidl::Channel {
        self.client.as_channel()
    }
}

#[cfg(target_os = "fuchsia")]
impl ControllerSynchronousProxy {
    pub fn new(channel: fidl::Channel) -> Self {
        let protocol_name = <ControllerMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME;
        Self { client: fidl::client::sync::Client::new(channel, protocol_name) }
    }

    pub fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    /// Waits until an event arrives and returns it. It is safe for other
    /// threads to make concurrent requests while waiting for an event.
    pub fn wait_for_event(
        &self,
        deadline: zx::MonotonicInstant,
    ) -> Result<ControllerEvent, fidl::Error> {
        ControllerEvent::decode(self.client.wait_for_event(deadline)?)
    }

    /// *** NOTE: `ViewProvider` is no longer the preferred way for a parent
    /// and child view to agree on a ViewportCreationToken / ViewCreationToken
    /// pair. Flatland-based clients are encouraged to use `PresentView` (below)
    /// instead of `AttachClientView`.
    ///
    /// Elicits the server to request a view using the
    /// `fuchsia.ui.app.ViewProvider` handle provided, and attach it to the
    /// scene.
    ///
    /// RETURN VALUE
    ///
    /// This method returns the KOID for the client view's `ViewRef`.
    ///
    /// SYNCHRONIZATION
    ///
    /// This call returns as soon as the client `ViewRef` is available. Note
    /// that this signal does NOT necessarily indicate that the view has been
    /// attached to the scene.
    ///
    /// LIFE CYCLE
    ///
    /// Clients may drop the `Controller` connection once `AttachClientView` has
    /// returned.
    pub fn r#attach_client_view(
        &self,
        mut payload: ControllerAttachClientViewRequest,
        ___deadline: zx::MonotonicInstant,
    ) -> Result<u64, fidl::Error> {
        let _response = self
            .client
            .send_query::<ControllerAttachClientViewRequest, ControllerAttachClientViewResponse>(
                &mut payload,
                0x271d621cc0687761,
                fidl::encoding::DynamicFlags::empty(),
                ___deadline,
            )?;
        Ok(_response.view_ref_koid)
    }

    /// Elicits the server to create a viewport using `viewport_creation_token`.
    ///
    /// LIFE CYCLE
    ///
    /// Clients may drop the `Controller` connection once `PresentClientView` has
    /// returned.
    pub fn r#present_client_view(
        &self,
        mut payload: ControllerPresentClientViewRequest,
    ) -> Result<(), fidl::Error> {
        self.client.send::<ControllerPresentClientViewRequest>(
            &mut payload,
            0x50b3378ecc810ca9,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    /// Registers a `ViewTreeWatcher` on the client's behalf.
    ///
    /// The `ViewTreeWatcher` registered on behalf of the client will currently
    /// be scoped globally; we intend to restrict the scope to the client view's
    /// subtree as soon as it's feasible to do so.
    ///
    /// For more information on geometry observation, see the documentation
    /// in //sdk/fidl/fuchsia.ui.observation.geometry/watcher.fidl.
    pub fn r#register_view_tree_watcher(
        &self,
        mut watcher: fidl::endpoints::ServerEnd<
            fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
        >,
        ___deadline: zx::MonotonicInstant,
    ) -> Result<(), fidl::Error> {
        let _response = self
            .client
            .send_query::<ControllerRegisterViewTreeWatcherRequest, fidl::encoding::EmptyPayload>(
                (watcher,),
                0x1370345f4914064,
                fidl::encoding::DynamicFlags::empty(),
                ___deadline,
            )?;
        Ok(_response)
    }

    /// A hanging get to watch for updates to view presentation.
    ///
    /// Callers can use this method to wait until a `ClientView` has
    /// `Present()`-ed through any of the following view presentation methods:
    ///   * `fuchsia.ui.test.scene.Controller/AttachClientView()`
    ///   * `fuchsia.ui.test.scene.Controller/PresentClientView()`
    ///   * `fuchsia.element.GraphicalPresenter/PresentView()`
    ///
    /// Callers should expect to call this method once for each view they
    /// expect to wait for.
    ///
    /// Note that callers must take care when interleaving calls, since
    /// this method has no way to
    ///   a) associate a `Present()` with a specific `ClientView`, or
    ///   b) associate a `Present()` with an `AttachClientView()` call, rather
    ///    than a `PresentClientView()` or `PresentView` call.
    ///
    /// It is invalid to call `WatchViewPresentation` while a previous call is
    /// still pending; subsequent requests will be ignored.
    pub fn r#watch_view_presentation(
        &self,
        ___deadline: zx::MonotonicInstant,
    ) -> Result<(), fidl::Error> {
        let _response =
            self.client.send_query::<fidl::encoding::EmptyPayload, fidl::encoding::EmptyPayload>(
                (),
                0x15439375bfe6d21d,
                fidl::encoding::DynamicFlags::empty(),
                ___deadline,
            )?;
        Ok(_response)
    }
}

#[cfg(target_os = "fuchsia")]
impl From<ControllerSynchronousProxy> for zx::Handle {
    fn from(value: ControllerSynchronousProxy) -> Self {
        value.into_channel().into()
    }
}

#[cfg(target_os = "fuchsia")]
impl From<fidl::Channel> for ControllerSynchronousProxy {
    fn from(value: fidl::Channel) -> Self {
        Self::new(value)
    }
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::FromClient for ControllerSynchronousProxy {
    type Protocol = ControllerMarker;

    fn from_client(value: fidl::endpoints::ClientEnd<ControllerMarker>) -> Self {
        Self::new(value.into_channel())
    }
}

#[derive(Debug, Clone)]
pub struct ControllerProxy {
    client: fidl::client::Client<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl fidl::endpoints::Proxy for ControllerProxy {
    type Protocol = ControllerMarker;

    fn from_channel(inner: ::fidl::AsyncChannel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> Result<::fidl::AsyncChannel, Self> {
        self.client.into_channel().map_err(|client| Self { client })
    }

    fn as_channel(&self) -> &::fidl::AsyncChannel {
        self.client.as_channel()
    }
}

impl ControllerProxy {
    /// Create a new Proxy for fuchsia.ui.test.scene/Controller.
    pub fn new(channel: ::fidl::AsyncChannel) -> Self {
        let protocol_name = <ControllerMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME;
        Self { client: fidl::client::Client::new(channel, protocol_name) }
    }

    /// Get a Stream of events from the remote end of the protocol.
    ///
    /// # Panics
    ///
    /// Panics if the event stream was already taken.
    pub fn take_event_stream(&self) -> ControllerEventStream {
        ControllerEventStream { event_receiver: self.client.take_event_receiver() }
    }

    /// *** NOTE: `ViewProvider` is no longer the preferred way for a parent
    /// and child view to agree on a ViewportCreationToken / ViewCreationToken
    /// pair. Flatland-based clients are encouraged to use `PresentView` (below)
    /// instead of `AttachClientView`.
    ///
    /// Elicits the server to request a view using the
    /// `fuchsia.ui.app.ViewProvider` handle provided, and attach it to the
    /// scene.
    ///
    /// RETURN VALUE
    ///
    /// This method returns the KOID for the client view's `ViewRef`.
    ///
    /// SYNCHRONIZATION
    ///
    /// This call returns as soon as the client `ViewRef` is available. Note
    /// that this signal does NOT necessarily indicate that the view has been
    /// attached to the scene.
    ///
    /// LIFE CYCLE
    ///
    /// Clients may drop the `Controller` connection once `AttachClientView` has
    /// returned.
    pub fn r#attach_client_view(
        &self,
        mut payload: ControllerAttachClientViewRequest,
    ) -> fidl::client::QueryResponseFut<u64, fidl::encoding::DefaultFuchsiaResourceDialect> {
        ControllerProxyInterface::r#attach_client_view(self, payload)
    }

    /// Elicits the server to create a viewport using `viewport_creation_token`.
    ///
    /// LIFE CYCLE
    ///
    /// Clients may drop the `Controller` connection once `PresentClientView` has
    /// returned.
    pub fn r#present_client_view(
        &self,
        mut payload: ControllerPresentClientViewRequest,
    ) -> Result<(), fidl::Error> {
        ControllerProxyInterface::r#present_client_view(self, payload)
    }

    /// Registers a `ViewTreeWatcher` on the client's behalf.
    ///
    /// The `ViewTreeWatcher` registered on behalf of the client will currently
    /// be scoped globally; we intend to restrict the scope to the client view's
    /// subtree as soon as it's feasible to do so.
    ///
    /// For more information on geometry observation, see the documentation
    /// in //sdk/fidl/fuchsia.ui.observation.geometry/watcher.fidl.
    pub fn r#register_view_tree_watcher(
        &self,
        mut watcher: fidl::endpoints::ServerEnd<
            fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
        >,
    ) -> fidl::client::QueryResponseFut<(), fidl::encoding::DefaultFuchsiaResourceDialect> {
        ControllerProxyInterface::r#register_view_tree_watcher(self, watcher)
    }

    /// A hanging get to watch for updates to view presentation.
    ///
    /// Callers can use this method to wait until a `ClientView` has
    /// `Present()`-ed through any of the following view presentation methods:
    ///   * `fuchsia.ui.test.scene.Controller/AttachClientView()`
    ///   * `fuchsia.ui.test.scene.Controller/PresentClientView()`
    ///   * `fuchsia.element.GraphicalPresenter/PresentView()`
    ///
    /// Callers should expect to call this method once for each view they
    /// expect to wait for.
    ///
    /// Note that callers must take care when interleaving calls, since
    /// this method has no way to
    ///   a) associate a `Present()` with a specific `ClientView`, or
    ///   b) associate a `Present()` with an `AttachClientView()` call, rather
    ///    than a `PresentClientView()` or `PresentView` call.
    ///
    /// It is invalid to call `WatchViewPresentation` while a previous call is
    /// still pending; subsequent requests will be ignored.
    pub fn r#watch_view_presentation(
        &self,
    ) -> fidl::client::QueryResponseFut<(), fidl::encoding::DefaultFuchsiaResourceDialect> {
        ControllerProxyInterface::r#watch_view_presentation(self)
    }
}

impl ControllerProxyInterface for ControllerProxy {
    type AttachClientViewResponseFut =
        fidl::client::QueryResponseFut<u64, fidl::encoding::DefaultFuchsiaResourceDialect>;
    fn r#attach_client_view(
        &self,
        mut payload: ControllerAttachClientViewRequest,
    ) -> Self::AttachClientViewResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<u64, fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                ControllerAttachClientViewResponse,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x271d621cc0687761,
            >(_buf?)?;
            Ok(_response.view_ref_koid)
        }
        self.client.send_query_and_decode::<ControllerAttachClientViewRequest, u64>(
            &mut payload,
            0x271d621cc0687761,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }

    fn r#present_client_view(
        &self,
        mut payload: ControllerPresentClientViewRequest,
    ) -> Result<(), fidl::Error> {
        self.client.send::<ControllerPresentClientViewRequest>(
            &mut payload,
            0x50b3378ecc810ca9,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    type RegisterViewTreeWatcherResponseFut =
        fidl::client::QueryResponseFut<(), fidl::encoding::DefaultFuchsiaResourceDialect>;
    fn r#register_view_tree_watcher(
        &self,
        mut watcher: fidl::endpoints::ServerEnd<
            fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
        >,
    ) -> Self::RegisterViewTreeWatcherResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<(), fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                fidl::encoding::EmptyPayload,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x1370345f4914064,
            >(_buf?)?;
            Ok(_response)
        }
        self.client.send_query_and_decode::<ControllerRegisterViewTreeWatcherRequest, ()>(
            (watcher,),
            0x1370345f4914064,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }

    type WatchViewPresentationResponseFut =
        fidl::client::QueryResponseFut<(), fidl::encoding::DefaultFuchsiaResourceDialect>;
    fn r#watch_view_presentation(&self) -> Self::WatchViewPresentationResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<(), fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                fidl::encoding::EmptyPayload,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x15439375bfe6d21d,
            >(_buf?)?;
            Ok(_response)
        }
        self.client.send_query_and_decode::<fidl::encoding::EmptyPayload, ()>(
            (),
            0x15439375bfe6d21d,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }
}

pub struct ControllerEventStream {
    event_receiver: fidl::client::EventReceiver<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl std::marker::Unpin for ControllerEventStream {}

impl futures::stream::FusedStream for ControllerEventStream {
    fn is_terminated(&self) -> bool {
        self.event_receiver.is_terminated()
    }
}

impl futures::Stream for ControllerEventStream {
    type Item = Result<ControllerEvent, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        match futures::ready!(futures::stream::StreamExt::poll_next_unpin(
            &mut self.event_receiver,
            cx
        )?) {
            Some(buf) => std::task::Poll::Ready(Some(ControllerEvent::decode(buf))),
            None => std::task::Poll::Ready(None),
        }
    }
}

#[derive(Debug)]
pub enum ControllerEvent {}

impl ControllerEvent {
    /// Decodes a message buffer as a [`ControllerEvent`].
    fn decode(
        mut buf: <fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc,
    ) -> Result<ControllerEvent, fidl::Error> {
        let (bytes, _handles) = buf.split_mut();
        let (tx_header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;
        debug_assert_eq!(tx_header.tx_id, 0);
        match tx_header.ordinal {
            _ => Err(fidl::Error::UnknownOrdinal {
                ordinal: tx_header.ordinal,
                protocol_name: <ControllerMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
            }),
        }
    }
}

/// A Stream of incoming requests for fuchsia.ui.test.scene/Controller.
pub struct ControllerRequestStream {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
    is_terminated: bool,
}

impl std::marker::Unpin for ControllerRequestStream {}

impl futures::stream::FusedStream for ControllerRequestStream {
    fn is_terminated(&self) -> bool {
        self.is_terminated
    }
}

impl fidl::endpoints::RequestStream for ControllerRequestStream {
    type Protocol = ControllerMarker;
    type ControlHandle = ControllerControlHandle;

    fn from_channel(channel: ::fidl::AsyncChannel) -> Self {
        Self { inner: std::sync::Arc::new(fidl::ServeInner::new(channel)), is_terminated: false }
    }

    fn control_handle(&self) -> Self::ControlHandle {
        ControllerControlHandle { inner: self.inner.clone() }
    }

    fn into_inner(
        self,
    ) -> (::std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>, bool)
    {
        (self.inner, self.is_terminated)
    }

    fn from_inner(
        inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
        is_terminated: bool,
    ) -> Self {
        Self { inner, is_terminated }
    }
}

impl futures::Stream for ControllerRequestStream {
    type Item = Result<ControllerRequest, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        let this = &mut *self;
        if this.inner.check_shutdown(cx) {
            this.is_terminated = true;
            return std::task::Poll::Ready(None);
        }
        if this.is_terminated {
            panic!("polled ControllerRequestStream after completion");
        }
        fidl::encoding::with_tls_decode_buf::<_, fidl::encoding::DefaultFuchsiaResourceDialect>(
            |bytes, handles| {
                match this.inner.channel().read_etc(cx, bytes, handles) {
                    std::task::Poll::Ready(Ok(())) => {}
                    std::task::Poll::Pending => return std::task::Poll::Pending,
                    std::task::Poll::Ready(Err(zx_status::Status::PEER_CLOSED)) => {
                        this.is_terminated = true;
                        return std::task::Poll::Ready(None);
                    }
                    std::task::Poll::Ready(Err(e)) => {
                        return std::task::Poll::Ready(Some(Err(fidl::Error::ServerRequestRead(
                            e.into(),
                        ))))
                    }
                }

                // A message has been received from the channel
                let (header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;

                std::task::Poll::Ready(Some(match header.ordinal {
                    0x271d621cc0687761 => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            ControllerAttachClientViewRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<ControllerAttachClientViewRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = ControllerControlHandle { inner: this.inner.clone() };
                        Ok(ControllerRequest::AttachClientView {
                            payload: req,
                            responder: ControllerAttachClientViewResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    0x50b3378ecc810ca9 => {
                        header.validate_request_tx_id(fidl::MethodType::OneWay)?;
                        let mut req = fidl::new_empty!(
                            ControllerPresentClientViewRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<ControllerPresentClientViewRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = ControllerControlHandle { inner: this.inner.clone() };
                        Ok(ControllerRequest::PresentClientView { payload: req, control_handle })
                    }
                    0x1370345f4914064 => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            ControllerRegisterViewTreeWatcherRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<ControllerRegisterViewTreeWatcherRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = ControllerControlHandle { inner: this.inner.clone() };
                        Ok(ControllerRequest::RegisterViewTreeWatcher {
                            watcher: req.watcher,

                            responder: ControllerRegisterViewTreeWatcherResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    0x15439375bfe6d21d => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            fidl::encoding::EmptyPayload,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<fidl::encoding::EmptyPayload>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = ControllerControlHandle { inner: this.inner.clone() };
                        Ok(ControllerRequest::WatchViewPresentation {
                            responder: ControllerWatchViewPresentationResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    _ => Err(fidl::Error::UnknownOrdinal {
                        ordinal: header.ordinal,
                        protocol_name:
                            <ControllerMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
                    }),
                }))
            },
        )
    }
}

/// Controls a UI test scene. Allows a test to attach test Views to the scene
/// and add View-related instrumentation.
#[derive(Debug)]
pub enum ControllerRequest {
    /// *** NOTE: `ViewProvider` is no longer the preferred way for a parent
    /// and child view to agree on a ViewportCreationToken / ViewCreationToken
    /// pair. Flatland-based clients are encouraged to use `PresentView` (below)
    /// instead of `AttachClientView`.
    ///
    /// Elicits the server to request a view using the
    /// `fuchsia.ui.app.ViewProvider` handle provided, and attach it to the
    /// scene.
    ///
    /// RETURN VALUE
    ///
    /// This method returns the KOID for the client view's `ViewRef`.
    ///
    /// SYNCHRONIZATION
    ///
    /// This call returns as soon as the client `ViewRef` is available. Note
    /// that this signal does NOT necessarily indicate that the view has been
    /// attached to the scene.
    ///
    /// LIFE CYCLE
    ///
    /// Clients may drop the `Controller` connection once `AttachClientView` has
    /// returned.
    AttachClientView {
        payload: ControllerAttachClientViewRequest,
        responder: ControllerAttachClientViewResponder,
    },
    /// Elicits the server to create a viewport using `viewport_creation_token`.
    ///
    /// LIFE CYCLE
    ///
    /// Clients may drop the `Controller` connection once `PresentClientView` has
    /// returned.
    PresentClientView {
        payload: ControllerPresentClientViewRequest,
        control_handle: ControllerControlHandle,
    },
    /// Registers a `ViewTreeWatcher` on the client's behalf.
    ///
    /// The `ViewTreeWatcher` registered on behalf of the client will currently
    /// be scoped globally; we intend to restrict the scope to the client view's
    /// subtree as soon as it's feasible to do so.
    ///
    /// For more information on geometry observation, see the documentation
    /// in //sdk/fidl/fuchsia.ui.observation.geometry/watcher.fidl.
    RegisterViewTreeWatcher {
        watcher:
            fidl::endpoints::ServerEnd<fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker>,
        responder: ControllerRegisterViewTreeWatcherResponder,
    },
    /// A hanging get to watch for updates to view presentation.
    ///
    /// Callers can use this method to wait until a `ClientView` has
    /// `Present()`-ed through any of the following view presentation methods:
    ///   * `fuchsia.ui.test.scene.Controller/AttachClientView()`
    ///   * `fuchsia.ui.test.scene.Controller/PresentClientView()`
    ///   * `fuchsia.element.GraphicalPresenter/PresentView()`
    ///
    /// Callers should expect to call this method once for each view they
    /// expect to wait for.
    ///
    /// Note that callers must take care when interleaving calls, since
    /// this method has no way to
    ///   a) associate a `Present()` with a specific `ClientView`, or
    ///   b) associate a `Present()` with an `AttachClientView()` call, rather
    ///    than a `PresentClientView()` or `PresentView` call.
    ///
    /// It is invalid to call `WatchViewPresentation` while a previous call is
    /// still pending; subsequent requests will be ignored.
    WatchViewPresentation { responder: ControllerWatchViewPresentationResponder },
}

impl ControllerRequest {
    #[allow(irrefutable_let_patterns)]
    pub fn into_attach_client_view(
        self,
    ) -> Option<(ControllerAttachClientViewRequest, ControllerAttachClientViewResponder)> {
        if let ControllerRequest::AttachClientView { payload, responder } = self {
            Some((payload, responder))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_present_client_view(
        self,
    ) -> Option<(ControllerPresentClientViewRequest, ControllerControlHandle)> {
        if let ControllerRequest::PresentClientView { payload, control_handle } = self {
            Some((payload, control_handle))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_register_view_tree_watcher(
        self,
    ) -> Option<(
        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker>,
        ControllerRegisterViewTreeWatcherResponder,
    )> {
        if let ControllerRequest::RegisterViewTreeWatcher { watcher, responder } = self {
            Some((watcher, responder))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_watch_view_presentation(
        self,
    ) -> Option<(ControllerWatchViewPresentationResponder)> {
        if let ControllerRequest::WatchViewPresentation { responder } = self {
            Some((responder))
        } else {
            None
        }
    }

    /// Name of the method defined in FIDL
    pub fn method_name(&self) -> &'static str {
        match *self {
            ControllerRequest::AttachClientView { .. } => "attach_client_view",
            ControllerRequest::PresentClientView { .. } => "present_client_view",
            ControllerRequest::RegisterViewTreeWatcher { .. } => "register_view_tree_watcher",
            ControllerRequest::WatchViewPresentation { .. } => "watch_view_presentation",
        }
    }
}

#[derive(Debug, Clone)]
pub struct ControllerControlHandle {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
}

impl fidl::endpoints::ControlHandle for ControllerControlHandle {
    fn shutdown(&self) {
        self.inner.shutdown()
    }
    fn shutdown_with_epitaph(&self, status: zx_status::Status) {
        self.inner.shutdown_with_epitaph(status)
    }

    fn is_closed(&self) -> bool {
        self.inner.channel().is_closed()
    }
    fn on_closed(&self) -> fidl::OnSignalsRef<'_> {
        self.inner.channel().on_closed()
    }

    #[cfg(target_os = "fuchsia")]
    fn signal_peer(
        &self,
        clear_mask: zx::Signals,
        set_mask: zx::Signals,
    ) -> Result<(), zx_status::Status> {
        use fidl::Peered;
        self.inner.channel().signal_peer(clear_mask, set_mask)
    }
}

impl ControllerControlHandle {}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct ControllerAttachClientViewResponder {
    control_handle: std::mem::ManuallyDrop<ControllerControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`ControllerControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for ControllerAttachClientViewResponder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for ControllerAttachClientViewResponder {
    type ControlHandle = ControllerControlHandle;

    fn control_handle(&self) -> &ControllerControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl ControllerAttachClientViewResponder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(self, mut view_ref_koid: u64) -> Result<(), fidl::Error> {
        let _result = self.send_raw(view_ref_koid);
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(self, mut view_ref_koid: u64) -> Result<(), fidl::Error> {
        let _result = self.send_raw(view_ref_koid);
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(&self, mut view_ref_koid: u64) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<ControllerAttachClientViewResponse>(
            (view_ref_koid,),
            self.tx_id,
            0x271d621cc0687761,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct ControllerRegisterViewTreeWatcherResponder {
    control_handle: std::mem::ManuallyDrop<ControllerControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`ControllerControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for ControllerRegisterViewTreeWatcherResponder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for ControllerRegisterViewTreeWatcherResponder {
    type ControlHandle = ControllerControlHandle;

    fn control_handle(&self) -> &ControllerControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl ControllerRegisterViewTreeWatcherResponder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(self) -> Result<(), fidl::Error> {
        let _result = self.send_raw();
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(self) -> Result<(), fidl::Error> {
        let _result = self.send_raw();
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(&self) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<fidl::encoding::EmptyPayload>(
            (),
            self.tx_id,
            0x1370345f4914064,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct ControllerWatchViewPresentationResponder {
    control_handle: std::mem::ManuallyDrop<ControllerControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`ControllerControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for ControllerWatchViewPresentationResponder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for ControllerWatchViewPresentationResponder {
    type ControlHandle = ControllerControlHandle;

    fn control_handle(&self) -> &ControllerControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl ControllerWatchViewPresentationResponder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(self) -> Result<(), fidl::Error> {
        let _result = self.send_raw();
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(self) -> Result<(), fidl::Error> {
        let _result = self.send_raw();
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(&self) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<fidl::encoding::EmptyPayload>(
            (),
            self.tx_id,
            0x15439375bfe6d21d,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

mod internal {
    use super::*;

    impl fidl::encoding::ResourceTypeMarker for ControllerRegisterViewTreeWatcherRequest {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for ControllerRegisterViewTreeWatcherRequest {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            4
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            4
        }
    }

    unsafe impl
        fidl::encoding::Encode<
            ControllerRegisterViewTreeWatcherRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut ControllerRegisterViewTreeWatcherRequest
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ControllerRegisterViewTreeWatcherRequest>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<
                ControllerRegisterViewTreeWatcherRequest,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >::encode(
                (<fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<
                        fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
                    >,
                > as fidl::encoding::ResourceTypeMarker>::take_or_borrow(
                    &mut self.watcher
                ),),
                encoder,
                offset,
                _depth,
            )
        }
    }
    unsafe impl<
            T0: fidl::encoding::Encode<
                fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<
                        fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
        >
        fidl::encoding::Encode<
            ControllerRegisterViewTreeWatcherRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for (T0,)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ControllerRegisterViewTreeWatcherRequest>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for ControllerRegisterViewTreeWatcherRequest
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                watcher: fidl::new_empty!(
                    fidl::encoding::Endpoint<
                        fidl::endpoints::ServerEnd<
                            fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
                        >,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect
                ),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(
                fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<
                        fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.watcher,
                decoder,
                offset + 0,
                _depth
            )?;
            Ok(())
        }
    }

    impl ControllerAttachClientViewRequest {
        #[inline(always)]
        fn max_ordinal_present(&self) -> u64 {
            if let Some(_) = self.view_provider {
                return 1;
            }
            0
        }
    }

    impl fidl::encoding::ResourceTypeMarker for ControllerAttachClientViewRequest {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for ControllerAttachClientViewRequest {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            16
        }
    }

    unsafe impl
        fidl::encoding::Encode<
            ControllerAttachClientViewRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut ControllerAttachClientViewRequest
    {
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ControllerAttachClientViewRequest>(offset);
            // Vector header
            let max_ordinal: u64 = self.max_ordinal_present();
            encoder.write_num(max_ordinal, offset);
            encoder.write_num(fidl::encoding::ALLOC_PRESENT_U64, offset + 8);
            // Calling encoder.out_of_line_offset(0) is not allowed.
            if max_ordinal == 0 {
                return Ok(());
            }
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = max_ordinal as usize * envelope_size;
            #[allow(unused_variables)]
            let offset = encoder.out_of_line_offset(bytes_len);
            let mut _prev_end_offset: usize = 0;
            if 1 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (1 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<
                fidl::encoding::Endpoint<
                    fidl::endpoints::ClientEnd<fidl_fuchsia_ui_app::ViewProviderMarker>,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >(
                self.view_provider.as_mut().map(
                    <fidl::encoding::Endpoint<
                        fidl::endpoints::ClientEnd<fidl_fuchsia_ui_app::ViewProviderMarker>,
                    > as fidl::encoding::ResourceTypeMarker>::take_or_borrow,
                ),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;

            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for ControllerAttachClientViewRequest
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self::default()
        }

        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            let len = match fidl::encoding::decode_vector_header(decoder, offset)? {
                None => return Err(fidl::Error::NotNullable),
                Some(len) => len,
            };
            // Calling decoder.out_of_line_offset(0) is not allowed.
            if len == 0 {
                return Ok(());
            };
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = len * envelope_size;
            let offset = decoder.out_of_line_offset(bytes_len)?;
            // Decode the envelope for each type.
            let mut _next_ordinal_to_read = 0;
            let mut next_offset = offset;
            let end_offset = offset + bytes_len;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 1 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size = <fidl::encoding::Endpoint<
                    fidl::endpoints::ClientEnd<fidl_fuchsia_ui_app::ViewProviderMarker>,
                > as fidl::encoding::TypeMarker>::inline_size(
                    decoder.context
                );
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.view_provider.get_or_insert_with(|| {
                    fidl::new_empty!(
                        fidl::encoding::Endpoint<
                            fidl::endpoints::ClientEnd<fidl_fuchsia_ui_app::ViewProviderMarker>,
                        >,
                        fidl::encoding::DefaultFuchsiaResourceDialect
                    )
                });
                fidl::decode!(
                    fidl::encoding::Endpoint<
                        fidl::endpoints::ClientEnd<fidl_fuchsia_ui_app::ViewProviderMarker>,
                    >,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;

            // Decode the remaining unknown envelopes.
            while next_offset < end_offset {
                _next_ordinal_to_read += 1;
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                next_offset += envelope_size;
            }

            Ok(())
        }
    }

    impl ControllerPresentClientViewRequest {
        #[inline(always)]
        fn max_ordinal_present(&self) -> u64 {
            if let Some(_) = self.viewport_creation_token {
                return 1;
            }
            0
        }
    }

    impl fidl::encoding::ResourceTypeMarker for ControllerPresentClientViewRequest {
        type Borrowed<'a> = &'a mut Self;
        fn take_or_borrow<'a>(
            value: &'a mut <Self as fidl::encoding::TypeMarker>::Owned,
        ) -> Self::Borrowed<'a> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for ControllerPresentClientViewRequest {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            16
        }
    }

    unsafe impl
        fidl::encoding::Encode<
            ControllerPresentClientViewRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut ControllerPresentClientViewRequest
    {
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ControllerPresentClientViewRequest>(offset);
            // Vector header
            let max_ordinal: u64 = self.max_ordinal_present();
            encoder.write_num(max_ordinal, offset);
            encoder.write_num(fidl::encoding::ALLOC_PRESENT_U64, offset + 8);
            // Calling encoder.out_of_line_offset(0) is not allowed.
            if max_ordinal == 0 {
                return Ok(());
            }
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = max_ordinal as usize * envelope_size;
            #[allow(unused_variables)]
            let offset = encoder.out_of_line_offset(bytes_len);
            let mut _prev_end_offset: usize = 0;
            if 1 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (1 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<fidl_fuchsia_ui_views::ViewportCreationToken, fidl::encoding::DefaultFuchsiaResourceDialect>(
            self.viewport_creation_token.as_mut().map(<fidl_fuchsia_ui_views::ViewportCreationToken as fidl::encoding::ResourceTypeMarker>::take_or_borrow),
            encoder, offset + cur_offset, depth
        )?;

            _prev_end_offset = cur_offset + envelope_size;

            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for ControllerPresentClientViewRequest
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self::default()
        }

        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<
                '_,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            let len = match fidl::encoding::decode_vector_header(decoder, offset)? {
                None => return Err(fidl::Error::NotNullable),
                Some(len) => len,
            };
            // Calling decoder.out_of_line_offset(0) is not allowed.
            if len == 0 {
                return Ok(());
            };
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = len * envelope_size;
            let offset = decoder.out_of_line_offset(bytes_len)?;
            // Decode the envelope for each type.
            let mut _next_ordinal_to_read = 0;
            let mut next_offset = offset;
            let end_offset = offset + bytes_len;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 1 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size = <fidl_fuchsia_ui_views::ViewportCreationToken as fidl::encoding::TypeMarker>::inline_size(decoder.context);
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.viewport_creation_token.get_or_insert_with(|| {
                    fidl::new_empty!(
                        fidl_fuchsia_ui_views::ViewportCreationToken,
                        fidl::encoding::DefaultFuchsiaResourceDialect
                    )
                });
                fidl::decode!(
                    fidl_fuchsia_ui_views::ViewportCreationToken,
                    fidl::encoding::DefaultFuchsiaResourceDialect,
                    val_ref,
                    decoder,
                    inner_offset,
                    inner_depth
                )?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;

            // Decode the remaining unknown envelopes.
            while next_offset < end_offset {
                _next_ordinal_to_read += 1;
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                next_offset += envelope_size;
            }

            Ok(())
        }
    }
}