fidl_fuchsia_ui_observation_scope/

fidl_fuchsia_ui_observation_scope.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_observation_scope_common::*;
use futures::future::{self, MaybeDone, TryFutureExt};
use zx_status;

#[derive(Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct RegistryRegisterScopedViewTreeWatcherRequest {
    pub context_view: u64,
    pub watcher:
        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker>,
}

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

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

impl fidl::endpoints::ProtocolMarker for RegistryMarker {
    type Proxy = RegistryProxy;
    type RequestStream = RegistryRequestStream;
    #[cfg(target_os = "fuchsia")]
    type SynchronousProxy = RegistrySynchronousProxy;

    const DEBUG_NAME: &'static str = "fuchsia.ui.observation.scope.Registry";
}
impl fidl::endpoints::DiscoverableProtocolMarker for RegistryMarker {}

pub trait RegistryProxyInterface: Send + Sync {
    type RegisterScopedViewTreeWatcherResponseFut: std::future::Future<Output = Result<(), fidl::Error>>
        + Send;
    fn r#register_scoped_view_tree_watcher(
        &self,
        context_view: u64,
        watcher: fidl::endpoints::ServerEnd<
            fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
        >,
    ) -> Self::RegisterScopedViewTreeWatcherResponseFut;
}
#[derive(Debug)]
#[cfg(target_os = "fuchsia")]
pub struct RegistrySynchronousProxy {
    client: fidl::client::sync::Client,
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::SynchronousProxy for RegistrySynchronousProxy {
    type Proxy = RegistryProxy;
    type Protocol = RegistryMarker;

    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 RegistrySynchronousProxy {
    pub fn new(channel: fidl::Channel) -> Self {
        let protocol_name = <RegistryMarker 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<RegistryEvent, fidl::Error> {
        RegistryEvent::decode(self.client.wait_for_event(deadline)?)
    }

    /// Sets up a geometry `ViewTreeWatcher` channel which reports the view tree
    /// geometry for a specific view, identified by `context_view`. The data
    /// received describes the `context_view` and its descendant views.
    ///
    /// This method may be called multiple times to obtain multiple geometry
    /// `ViewTreeWatcher`s. Typical usage is to obtain just one geometry
    /// `ViewTreeWatcher`.
    ///
    /// Client can freely disconnect this `Registry` endpoint after this method
    /// returns and the `ViewTreeWatcher` endpoint will remain active.
    ///
    /// Flow control. The caller is allowed at most one in-flight call at a
    /// time. Subsequent calls must wait until the acknowledgment returns.
    /// Non-compliance results in channel closure.
    ///
    /// Client synchronization. The method response signifies that the server
    /// has processed the channel endpoint. A client can synchronize its next
    /// actions based on this guarantee (for example, trigger a change in view
    /// geometry without the change "getting lost").
    ///
    /// View lifecycle. The view represented by `context_view` must first be
    /// created. Otherwise, `geometry` channel's server endpoint is closed.
    ///
    /// + request `context_view` a view's identity, which serves as the root of
    ///   a view tree
    /// + request `geometry` a channel to observe `context_view`'s view tree
    /// - response acknowledgement that `geometry` is connected to the server
    pub fn r#register_scoped_view_tree_watcher(
        &self,
        mut context_view: u64,
        mut watcher: fidl::endpoints::ServerEnd<
            fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
        >,
        ___deadline: zx::MonotonicInstant,
    ) -> Result<(), fidl::Error> {
        let _response = self.client.send_query::<
            RegistryRegisterScopedViewTreeWatcherRequest,
            fidl::encoding::EmptyPayload,
        >(
            (context_view, watcher,),
            0x7fcb9e2fd95ffc3d,
            fidl::encoding::DynamicFlags::empty(),
            ___deadline,
        )?;
        Ok(_response)
    }
}

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

impl fidl::endpoints::Proxy for RegistryProxy {
    type Protocol = RegistryMarker;

    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 RegistryProxy {
    /// Create a new Proxy for fuchsia.ui.observation.scope/Registry.
    pub fn new(channel: ::fidl::AsyncChannel) -> Self {
        let protocol_name = <RegistryMarker 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) -> RegistryEventStream {
        RegistryEventStream { event_receiver: self.client.take_event_receiver() }
    }

    /// Sets up a geometry `ViewTreeWatcher` channel which reports the view tree
    /// geometry for a specific view, identified by `context_view`. The data
    /// received describes the `context_view` and its descendant views.
    ///
    /// This method may be called multiple times to obtain multiple geometry
    /// `ViewTreeWatcher`s. Typical usage is to obtain just one geometry
    /// `ViewTreeWatcher`.
    ///
    /// Client can freely disconnect this `Registry` endpoint after this method
    /// returns and the `ViewTreeWatcher` endpoint will remain active.
    ///
    /// Flow control. The caller is allowed at most one in-flight call at a
    /// time. Subsequent calls must wait until the acknowledgment returns.
    /// Non-compliance results in channel closure.
    ///
    /// Client synchronization. The method response signifies that the server
    /// has processed the channel endpoint. A client can synchronize its next
    /// actions based on this guarantee (for example, trigger a change in view
    /// geometry without the change "getting lost").
    ///
    /// View lifecycle. The view represented by `context_view` must first be
    /// created. Otherwise, `geometry` channel's server endpoint is closed.
    ///
    /// + request `context_view` a view's identity, which serves as the root of
    ///   a view tree
    /// + request `geometry` a channel to observe `context_view`'s view tree
    /// - response acknowledgement that `geometry` is connected to the server
    pub fn r#register_scoped_view_tree_watcher(
        &self,
        mut context_view: u64,
        mut watcher: fidl::endpoints::ServerEnd<
            fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
        >,
    ) -> fidl::client::QueryResponseFut<(), fidl::encoding::DefaultFuchsiaResourceDialect> {
        RegistryProxyInterface::r#register_scoped_view_tree_watcher(self, context_view, watcher)
    }
}

impl RegistryProxyInterface for RegistryProxy {
    type RegisterScopedViewTreeWatcherResponseFut =
        fidl::client::QueryResponseFut<(), fidl::encoding::DefaultFuchsiaResourceDialect>;
    fn r#register_scoped_view_tree_watcher(
        &self,
        mut context_view: u64,
        mut watcher: fidl::endpoints::ServerEnd<
            fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
        >,
    ) -> Self::RegisterScopedViewTreeWatcherResponseFut {
        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,
                0x7fcb9e2fd95ffc3d,
            >(_buf?)?;
            Ok(_response)
        }
        self.client.send_query_and_decode::<RegistryRegisterScopedViewTreeWatcherRequest, ()>(
            (context_view, watcher),
            0x7fcb9e2fd95ffc3d,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }
}

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

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

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

impl futures::Stream for RegistryEventStream {
    type Item = Result<RegistryEvent, 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(RegistryEvent::decode(buf))),
            None => std::task::Poll::Ready(None),
        }
    }
}

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

impl RegistryEvent {
    /// Decodes a message buffer as a [`RegistryEvent`].
    fn decode(
        mut buf: <fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc,
    ) -> Result<RegistryEvent, 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: <RegistryMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
            }),
        }
    }
}

/// A Stream of incoming requests for fuchsia.ui.observation.scope/Registry.
pub struct RegistryRequestStream {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
    is_terminated: bool,
}

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

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

impl fidl::endpoints::RequestStream for RegistryRequestStream {
    type Protocol = RegistryMarker;
    type ControlHandle = RegistryControlHandle;

    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 {
        RegistryControlHandle { 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 RegistryRequestStream {
    type Item = Result<RegistryRequest, 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 RegistryRequestStream 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 {
                    0x7fcb9e2fd95ffc3d => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            RegistryRegisterScopedViewTreeWatcherRequest,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<RegistryRegisterScopedViewTreeWatcherRequest>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = RegistryControlHandle { inner: this.inner.clone() };
                        Ok(RegistryRequest::RegisterScopedViewTreeWatcher {
                            context_view: req.context_view,
                            watcher: req.watcher,

                            responder: RegistryRegisterScopedViewTreeWatcherResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    _ => Err(fidl::Error::UnknownOrdinal {
                        ordinal: header.ordinal,
                        protocol_name:
                            <RegistryMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
                    }),
                }))
            },
        )
    }
}

/// *** ONLY FOR USE IN PLATFORM COMPONENTS ***
/// This is a sensitive protocol. It provides unlimited visibility into any
/// view tree, if handed the tree root's view ref KOID. Hand it out ONLY to
/// platform components, such as Accessibility Manager or UI Test Manager.
///
/// Regular UI clients uses should obtain observation protocols through a
/// graphics factory function (see |fuchsia.ui.composition.ViewBoundProtocols|),
/// which securely ties observation protocols to a specific view client.
#[derive(Debug)]
pub enum RegistryRequest {
    /// Sets up a geometry `ViewTreeWatcher` channel which reports the view tree
    /// geometry for a specific view, identified by `context_view`. The data
    /// received describes the `context_view` and its descendant views.
    ///
    /// This method may be called multiple times to obtain multiple geometry
    /// `ViewTreeWatcher`s. Typical usage is to obtain just one geometry
    /// `ViewTreeWatcher`.
    ///
    /// Client can freely disconnect this `Registry` endpoint after this method
    /// returns and the `ViewTreeWatcher` endpoint will remain active.
    ///
    /// Flow control. The caller is allowed at most one in-flight call at a
    /// time. Subsequent calls must wait until the acknowledgment returns.
    /// Non-compliance results in channel closure.
    ///
    /// Client synchronization. The method response signifies that the server
    /// has processed the channel endpoint. A client can synchronize its next
    /// actions based on this guarantee (for example, trigger a change in view
    /// geometry without the change "getting lost").
    ///
    /// View lifecycle. The view represented by `context_view` must first be
    /// created. Otherwise, `geometry` channel's server endpoint is closed.
    ///
    /// + request `context_view` a view's identity, which serves as the root of
    ///   a view tree
    /// + request `geometry` a channel to observe `context_view`'s view tree
    /// - response acknowledgement that `geometry` is connected to the server
    RegisterScopedViewTreeWatcher {
        context_view: u64,
        watcher:
            fidl::endpoints::ServerEnd<fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker>,
        responder: RegistryRegisterScopedViewTreeWatcherResponder,
    },
}

impl RegistryRequest {
    #[allow(irrefutable_let_patterns)]
    pub fn into_register_scoped_view_tree_watcher(
        self,
    ) -> Option<(
        u64,
        fidl::endpoints::ServerEnd<fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker>,
        RegistryRegisterScopedViewTreeWatcherResponder,
    )> {
        if let RegistryRequest::RegisterScopedViewTreeWatcher { context_view, watcher, responder } =
            self
        {
            Some((context_view, watcher, responder))
        } else {
            None
        }
    }

    /// Name of the method defined in FIDL
    pub fn method_name(&self) -> &'static str {
        match *self {
            RegistryRequest::RegisterScopedViewTreeWatcher { .. } => {
                "register_scoped_view_tree_watcher"
            }
        }
    }
}

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

impl fidl::endpoints::ControlHandle for RegistryControlHandle {
    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 RegistryControlHandle {}

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

/// Set the the channel to be shutdown (see [`RegistryControlHandle::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 RegistryRegisterScopedViewTreeWatcherResponder {
    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 RegistryRegisterScopedViewTreeWatcherResponder {
    type ControlHandle = RegistryControlHandle;

    fn control_handle(&self) -> &RegistryControlHandle {
        &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 RegistryRegisterScopedViewTreeWatcherResponder {
    /// 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,
            0x7fcb9e2fd95ffc3d,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

mod internal {
    use super::*;

    impl fidl::encoding::ResourceTypeMarker for RegistryRegisterScopedViewTreeWatcherRequest {
        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 RegistryRegisterScopedViewTreeWatcherRequest {
        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<
            RegistryRegisterScopedViewTreeWatcherRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for &mut RegistryRegisterScopedViewTreeWatcherRequest
    {
        #[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::<RegistryRegisterScopedViewTreeWatcherRequest>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<
                RegistryRegisterScopedViewTreeWatcherRequest,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >::encode(
                (
                    <u64 as fidl::encoding::ValueTypeMarker>::borrow(&self.context_view),
                    <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<u64, fidl::encoding::DefaultFuchsiaResourceDialect>,
            T1: fidl::encoding::Encode<
                fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<
                        fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
            >,
        >
        fidl::encoding::Encode<
            RegistryRegisterScopedViewTreeWatcherRequest,
            fidl::encoding::DefaultFuchsiaResourceDialect,
        > for (T0, T1)
    {
        #[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::<RegistryRegisterScopedViewTreeWatcherRequest>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            unsafe {
                let ptr = encoder.buf.as_mut_ptr().add(offset).offset(8);
                (ptr as *mut u64).write_unaligned(0);
            }
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            self.1.encode(encoder, offset + 8, depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::Decode<Self, fidl::encoding::DefaultFuchsiaResourceDialect>
        for RegistryRegisterScopedViewTreeWatcherRequest
    {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                context_view: fidl::new_empty!(u64, fidl::encoding::DefaultFuchsiaResourceDialect),
                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.
            let ptr = unsafe { decoder.buf.as_ptr().add(offset).offset(8) };
            let padval = unsafe { (ptr as *const u64).read_unaligned() };
            let mask = 0xffffffff00000000u64;
            let maskedval = padval & mask;
            if maskedval != 0 {
                return Err(fidl::Error::NonZeroPadding {
                    padding_start: offset + 8 + ((mask as u64).trailing_zeros() / 8) as usize,
                });
            }
            fidl::decode!(
                u64,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.context_view,
                decoder,
                offset + 0,
                _depth
            )?;
            fidl::decode!(
                fidl::encoding::Endpoint<
                    fidl::endpoints::ServerEnd<
                        fidl_fuchsia_ui_observation_geometry::ViewTreeWatcherMarker,
                    >,
                >,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                &mut self.watcher,
                decoder,
                offset + 8,
                _depth
            )?;
            Ok(())
        }
    }
}