Struct ViewArgs3

pub struct ViewArgs3 {
    pub token: ViewToken,
    pub control_ref: ViewRefControl,
    pub view_ref: ViewRef,
    pub debug_name: Option<String>,
}

Represents the root of a subgraph within a larger scene graph. Nodes can be attached to the View as children, and these Nodes will have the Views’ coordinate transform applied to their own, in addition to being clipped to the Views’ bounding box. See ViewProperties.

Each View is linked to a paired ViewHolder via a shared token pair.

Usually the View and its associated ViewHolder exist in separate processes. By combining them, the UI for an entire system can be built using content contributed from many different processes.

Clients self-identify their View with a ViewRef, which is a stable identifier that may be cloned and passed to other components in a feed-forward style. It is accompanied by a ViewRefControl, which Scenic uses to signal View destruction across the system; the ViewRefControl must be unique - do not clone it.

Fields

token: ViewToken

control_ref: ViewRefControl

control_ref.reference must have default eventpair rights (i.e., with signaling), minus ZX_RIGHT_DUPLICATE.

view_ref: ViewRef

view_ref.reference must have basic rights (i.e., no signaling).

debug_name: Option<String>

Trait Implementations

impl Debug for ViewArgs3

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

Formats the value using the given formatter.

impl Decode<ViewArgs3, DefaultFuchsiaResourceDialect> for ViewArgs3

fn new_empty() -> Self

Creates a valid instance of Self. The specific value does not matter, since it will be overwritten by decode.

unsafe fn decode( &mut self, decoder: &mut Decoder<'_, DefaultFuchsiaResourceDialect>, offset: usize, _depth: Depth, ) -> Result<()>

Decodes an object of type T from the decoder’s buffers into self.

impl Encode<ViewArgs3, DefaultFuchsiaResourceDialect> for &mut ViewArgs3

unsafe fn encode( self, encoder: &mut Encoder<'_, DefaultFuchsiaResourceDialect>, offset: usize, _depth: Depth, ) -> Result<()>

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

impl<T0: Encode<ViewToken, DefaultFuchsiaResourceDialect>, T1: Encode<ViewRefControl, DefaultFuchsiaResourceDialect>, T2: Encode<ViewRef, DefaultFuchsiaResourceDialect>, T3: Encode<Optional<UnboundedString>, DefaultFuchsiaResourceDialect>> Encode<ViewArgs3, DefaultFuchsiaResourceDialect> for (T0, T1, T2, T3)

unsafe fn encode( self, encoder: &mut Encoder<'_, DefaultFuchsiaResourceDialect>, offset: usize, depth: Depth, ) -> Result<()>

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

impl PartialEq for ViewArgs3

fn eq(&self, other: &ViewArgs3) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl ResourceTypeMarker for ViewArgs3

type Borrowed<'a> = &'a mut ViewArgs3

The Rust type to use for encoding. This is a particular Encode<Self> type cheaply obtainable from &mut Self::Owned. There are three cases:

fn take_or_borrow<'a>( value: &'a mut <Self as TypeMarker>::Owned, ) -> Self::Borrowed<'a>

Cheaply converts from &mut Self::Owned to Self::Borrowed. For HandleBased types this is “take” (it returns an owned handle and replaces value with Handle::invalid), and for all other types it is “borrow” (just converts from one reference to another).

impl TypeMarker for ViewArgs3

type Owned = ViewArgs3

The owned Rust type which this FIDL type decodes into.

fn inline_align(_context: Context) -> usize

Returns the minimum required alignment of the inline portion of the encoded object. It must be a (nonzero) power of two.

fn inline_size(_context: Context) -> usize

Returns the size of the inline portion of the encoded object, including padding for alignment. Must be a multiple of inline_align.

fn encode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and encoding requires no validation. When true, we can optimize encoding arrays and vectors of Self::Owned to a single memcpy.

fn decode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and decoding requires no validation. When true, we can optimize decoding arrays and vectors of Self::Owned to a single memcpy.

impl Standalone<DefaultFuchsiaResourceDialect> for ViewArgs3

impl StructuralPartialEq for ViewArgs3