Type Alias HTMLCanvasElementOrOffscreenCanvas

pub(crate) type HTMLCanvasElementOrOffscreenCanvas = HTMLCanvasElementOrOffscreenCanvas<DomTypeHolder>;

Aliased Type

enum HTMLCanvasElementOrOffscreenCanvas {
    HTMLCanvasElement(Root<Dom<HTMLCanvasElement>>),
    OffscreenCanvas(Root<Dom<OffscreenCanvas>>),
}

Variants

HTMLCanvasElement(Root<Dom<HTMLCanvasElement>>)

OffscreenCanvas(Root<Dom<OffscreenCanvas>>)

Implementations

impl<D: DomTypes> HTMLCanvasElementOrOffscreenCanvas<D>

unsafe fn TryConvertToHTMLCanvasElement( cx: SafeJSContext, value: HandleValue<'_>, ) -> Result<Option<DomRoot<D::HTMLCanvasElement>>, ()>

unsafe fn TryConvertToOffscreenCanvas( cx: SafeJSContext, value: HandleValue<'_>, ) -> Result<Option<DomRoot<D::OffscreenCanvas>>, ()>

Trait Implementations

impl CanvasHelpers for HTMLCanvasElementOrOffscreenCanvas<DomTypeHolder>

fn size(&self) -> Size2D<u64>

fn canvas(&self) -> Option<&HTMLCanvasElement>

impl<D: DomTypes> Clone for HTMLCanvasElementOrOffscreenCanvas<D>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<D: DomTypes> FromJSValConvertible for HTMLCanvasElementOrOffscreenCanvas<D>

type Config = ()

Optional configurable behaviour switch; use () for no configuration.

unsafe fn from_jsval( cx: *mut JSContext, value: HandleValue<'_>, _option: (), ) -> Result<ConversionResult<HTMLCanvasElementOrOffscreenCanvas<D>>, ()>

Convert val to type Self. Optional configuration of type T can be passed as the option argument. If it returns Err(()), a JSAPI exception is pending. If it returns Ok(Failure(reason)), there is no pending JSAPI exception.

impl<D> MallocSizeOf for HTMLCanvasElementOrOffscreenCanvas<D>

where D: MallocSizeOf + DomTypes,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl<D: DomTypes> ToJSValConvertible for HTMLCanvasElementOrOffscreenCanvas<D>

unsafe fn to_jsval(&self, cx: *mut JSContext, rval: MutableHandleValue<'_>)

Convert self to a JSVal. JSAPI failure causes a panic.

impl<D> Traceable for HTMLCanvasElementOrOffscreenCanvas<D>

where D: JSTraceable + DomTypes,

unsafe fn trace(&self, tracer: *mut JSTracer)

Trace self.