pub trait Castable: IDLInterface + DomObject + Sized {
    // Provided methods
    fn is<T>(&self) -> bool
       where T: DerivedFrom<Self> { ... }
    fn upcast<T>(&self) -> &T
       where T: Castable,
             Self: DerivedFrom<T> { ... }
    fn downcast<T>(&self) -> Option<&T>
       where T: DerivedFrom<Self> { ... }
}
Expand description

A trait to hold the cast functions of IDL interfaces that either derive or are derived from other interfaces.

Provided Methods§

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fn is<T>(&self) -> bool
where T: DerivedFrom<Self>,

Check whether a DOM object implements one of its deriving interfaces.

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fn upcast<T>(&self) -> &T
where T: Castable, Self: DerivedFrom<T>,

Cast a DOM object upwards to one of the interfaces it derives from.

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fn downcast<T>(&self) -> Option<&T>
where T: DerivedFrom<Self>,

Cast a DOM object downwards to one of the interfaces it might implement.

Object Safety§

This trait is not object safe.

Implementors§

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impl Castable for AbstractRange

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impl Castable for AnalyserNode

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impl Castable for AnimationEvent

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impl Castable for Attr

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impl Castable for AudioBufferSourceNode

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impl Castable for AudioContext

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impl Castable for AudioDestinationNode

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impl Castable for AudioNode

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impl Castable for AudioScheduledSourceNode

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impl Castable for AudioTrackList

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impl Castable for BaseAudioContext

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impl Castable for BeforeUnloadEvent

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impl Castable for BiquadFilterNode

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impl Castable for Blob

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impl Castable for Bluetooth

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impl Castable for BluetoothAdvertisingEvent

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impl Castable for BluetoothDevice

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impl Castable for BluetoothPermissionResult

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impl Castable for BluetoothRemoteGATTCharacteristic

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impl Castable for BluetoothRemoteGATTService

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impl Castable for BroadcastChannel

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impl Castable for CDATASection

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impl Castable for ChannelMergerNode

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impl Castable for ChannelSplitterNode

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impl Castable for CharacterData

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impl Castable for CloseEvent

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impl Castable for Comment

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impl Castable for CompositionEvent

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impl Castable for ConstantSourceNode

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impl Castable for CSSConditionRule

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impl Castable for CSSFontFaceRule

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impl Castable for CSSGroupingRule

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impl Castable for CSSImportRule

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impl Castable for CSSKeyframeRule

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impl Castable for CSSKeyframesRule

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impl Castable for CSSLayerBlockRule

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impl Castable for CSSLayerStatementRule

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impl Castable for CSSMediaRule

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impl Castable for CSSNamespaceRule

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impl Castable for CSSRule

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impl Castable for CSSStyleRule

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impl Castable for CSSStyleSheet

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impl Castable for CSSSupportsRule

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impl Castable for CustomEvent

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impl Castable for DedicatedWorkerGlobalScope

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impl Castable for DissimilarOriginWindow

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impl Castable for Document

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impl Castable for DocumentFragment

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impl Castable for DocumentType

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impl Castable for DOMException

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impl Castable for DOMMatrix

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impl Castable for DOMMatrixReadOnly

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impl Castable for DOMPoint

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impl Castable for DOMPointReadOnly

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impl Castable for DOMRect

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impl Castable for DOMRectReadOnly

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impl Castable for Element

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impl Castable for ErrorEvent

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impl Castable for Event

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impl Castable for EventSource

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impl Castable for EventTarget

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impl Castable for ExtendableEvent

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impl Castable for ExtendableMessageEvent

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impl Castable for File

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impl Castable for FileReader

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impl Castable for FocusEvent

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impl Castable for FormDataEvent

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impl Castable for GainNode

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impl Castable for GamepadEvent

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impl Castable for GlobalScope

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impl Castable for GPUDevice

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impl Castable for GPUError

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impl Castable for GPUInternalError

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impl Castable for GPUOutOfMemoryError

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impl Castable for GPUUncapturedErrorEvent

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impl Castable for GPUValidationError

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impl Castable for HashChangeEvent

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impl Castable for HTMLAnchorElement

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impl Castable for HTMLAreaElement

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impl Castable for HTMLAudioElement

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impl Castable for HTMLBaseElement

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impl Castable for HTMLBodyElement

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impl Castable for HTMLBRElement

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impl Castable for HTMLButtonElement

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impl Castable for HTMLCanvasElement

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impl Castable for HTMLCollection

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impl Castable for HTMLDataElement

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impl Castable for HTMLDataListElement

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impl Castable for HTMLDetailsElement

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impl Castable for HTMLDialogElement

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impl Castable for HTMLDirectoryElement

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impl Castable for HTMLDivElement

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impl Castable for HTMLDListElement

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impl Castable for HTMLElement

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impl Castable for HTMLEmbedElement

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impl Castable for HTMLFieldSetElement

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impl Castable for HTMLFontElement

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impl Castable for HTMLFormControlsCollection

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impl Castable for HTMLFormElement

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impl Castable for HTMLFrameElement

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impl Castable for HTMLFrameSetElement

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impl Castable for HTMLHeadElement

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impl Castable for HTMLHeadingElement

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impl Castable for HTMLHRElement

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impl Castable for HTMLHtmlElement

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impl Castable for HTMLIFrameElement

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impl Castable for HTMLImageElement

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impl Castable for HTMLInputElement

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impl Castable for HTMLLabelElement

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impl Castable for HTMLLegendElement

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impl Castable for HTMLLIElement

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impl Castable for HTMLLinkElement

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impl Castable for HTMLMapElement

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impl Castable for HTMLMediaElement

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impl Castable for HTMLMenuElement

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impl Castable for HTMLMetaElement

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impl Castable for HTMLMeterElement

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impl Castable for HTMLModElement

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impl Castable for HTMLObjectElement

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impl Castable for HTMLOListElement

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impl Castable for HTMLOptGroupElement

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impl Castable for HTMLOptionElement

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impl Castable for HTMLOptionsCollection

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impl Castable for HTMLOutputElement

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impl Castable for HTMLParagraphElement

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impl Castable for HTMLParamElement

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impl Castable for HTMLPictureElement

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impl Castable for HTMLPreElement

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impl Castable for HTMLProgressElement

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impl Castable for HTMLQuoteElement

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impl Castable for HTMLScriptElement

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impl Castable for HTMLSelectElement

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impl Castable for HTMLSourceElement

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impl Castable for HTMLSpanElement

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impl Castable for HTMLStyleElement

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impl Castable for HTMLTableCaptionElement

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impl Castable for HTMLTableCellElement

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impl Castable for HTMLTableColElement

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impl Castable for HTMLTableElement

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impl Castable for HTMLTableRowElement

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impl Castable for HTMLTableSectionElement

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impl Castable for HTMLTemplateElement

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impl Castable for HTMLTextAreaElement

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impl Castable for HTMLTimeElement

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impl Castable for HTMLTitleElement

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impl Castable for HTMLTrackElement

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impl Castable for HTMLUListElement

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impl Castable for HTMLUnknownElement

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impl Castable for HTMLVideoElement

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impl Castable for InputEvent

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impl Castable for KeyboardEvent

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impl Castable for MediaDevices

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impl Castable for MediaElementAudioSourceNode

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impl Castable for MediaQueryList

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impl Castable for MediaQueryListEvent

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impl Castable for MediaStream

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impl Castable for MediaStreamAudioDestinationNode

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impl Castable for MediaStreamAudioSourceNode

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impl Castable for MediaStreamTrack

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impl Castable for MediaStreamTrackAudioSourceNode

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impl Castable for MessageEvent

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impl Castable for MessagePort

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impl Castable for MouseEvent

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impl Castable for Node

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impl Castable for NodeList

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impl Castable for OfflineAudioCompletionEvent

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impl Castable for OfflineAudioContext

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impl Castable for OffscreenCanvas

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impl Castable for OscillatorNode

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impl Castable for PageTransitionEvent

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impl Castable for PaintWorkletGlobalScope

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impl Castable for PannerNode

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impl Castable for Performance

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impl Castable for PerformanceEntry

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impl Castable for PerformanceMark

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impl Castable for PerformanceMeasure

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impl Castable for PerformanceNavigationTiming

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impl Castable for PerformancePaintTiming

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impl Castable for PerformanceResourceTiming

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impl Castable for PermissionStatus

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impl Castable for PopStateEvent

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impl Castable for ProcessingInstruction

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impl Castable for ProgressEvent

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impl Castable for PromiseRejectionEvent

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impl Castable for RadioNodeList

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impl Castable for Range

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impl Castable for RTCDataChannel

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impl Castable for RTCDataChannelEvent

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impl Castable for RTCError

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impl Castable for RTCErrorEvent

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impl Castable for RTCPeerConnection

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impl Castable for RTCPeerConnectionIceEvent

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impl Castable for RTCTrackEvent

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impl Castable for ServiceWorker

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impl Castable for ServiceWorkerContainer

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impl Castable for ServiceWorkerGlobalScope

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impl Castable for ServiceWorkerRegistration

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impl Castable for ShadowRoot

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impl Castable for StaticRange

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impl Castable for StereoPannerNode

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impl Castable for StorageEvent

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impl Castable for StyleSheet

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impl Castable for SubmitEvent

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impl Castable for SVGElement

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impl Castable for SVGGraphicsElement

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impl Castable for SVGSVGElement

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impl Castable for TestBinding

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impl Castable for TestBindingProxy

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impl Castable for TestWorkletGlobalScope

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impl Castable for Text

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impl Castable for TextTrack

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impl Castable for TextTrackCue

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impl Castable for TextTrackList

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impl Castable for TouchEvent

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impl Castable for TrackEvent

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impl Castable for TransitionEvent

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impl Castable for UIEvent

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impl Castable for VideoTrackList

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impl Castable for VTTCue

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impl Castable for WebGLBuffer

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impl Castable for WebGLContextEvent

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impl Castable for WebGLFramebuffer

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impl Castable for WebGLObject

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impl Castable for WebGLProgram

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impl Castable for WebGLQuery

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impl Castable for WebGLRenderbuffer

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impl Castable for WebGLSampler

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impl Castable for WebGLShader

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impl Castable for WebGLSync

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impl Castable for WebGLTexture

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impl Castable for WebGLTransformFeedback

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impl Castable for WebGLVertexArrayObject

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impl Castable for WebGLVertexArrayObjectOES

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impl Castable for WebSocket

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impl Castable for WheelEvent

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impl Castable for Window

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impl Castable for Worker

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impl Castable for WorkerGlobalScope

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impl Castable for WorkletGlobalScope

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impl Castable for XMLDocument

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impl Castable for XMLHttpRequest

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impl Castable for XMLHttpRequestEventTarget

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impl Castable for XMLHttpRequestUpload

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impl Castable for XRCompositionLayer

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impl Castable for XRCubeLayer

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impl Castable for XRCylinderLayer

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impl Castable for XREquirectLayer

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impl Castable for XRInputSourceEvent

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impl Castable for XRInputSourcesChangeEvent

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impl Castable for XRJointPose

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impl Castable for XRJointSpace

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impl Castable for XRLayer

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impl Castable for XRLayerEvent

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impl Castable for XRPose

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impl Castable for XRProjectionLayer

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impl Castable for XRQuadLayer

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impl Castable for XRReferenceSpace

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impl Castable for XRSession

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impl Castable for XRSessionEvent

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impl Castable for XRSpace

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impl Castable for XRSubImage

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impl Castable for XRSystem

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impl Castable for XRViewerPose

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impl Castable for XRWebGLLayer

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impl Castable for XRWebGLSubImage