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WIP: Intergrate EventProxy for OffscreenCanvas
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| import { AssociatedArrayType, WorkerTask, WorkerTaskMessage } from 'wtd-core'; | ||
| import { OffscreenPayload } from './OffscreenPayload.js'; | ||
|
|
||
| export const wheelEventHandler = (event: Event, sendFn: (data: OffscreenPayload) => void) => { | ||
| event.preventDefault(); | ||
| wheelEventHandlerImpl(event, sendFn); | ||
| }; | ||
|
|
||
| export const preventDefaultHandler = (event: Event) => { | ||
| event.preventDefault(); | ||
| }; | ||
|
|
||
| export const copyProperties = (src: Event, properties: string[], dst: AssociatedArrayType<unknown>) => { | ||
| for (const name of properties) { | ||
| // eslint-disable-next-line @typescript-eslint/no-explicit-any | ||
| dst[name] = (src as any)[name]; | ||
| } | ||
| }; | ||
|
|
||
| export const makeSendPropertiesHandler = (properties: string[]) => { | ||
| return function sendProperties(event: Event, sendFn: (data: OffscreenPayload) => void) { | ||
| const eventTarget = { | ||
| type: event.type, | ||
| }; | ||
| copyProperties(event, properties, eventTarget); | ||
| const payload = new OffscreenPayload({ | ||
| event: eventTarget | ||
| }); | ||
|
|
||
| sendFn(payload); | ||
| }; | ||
| }; | ||
|
|
||
| export const touchEventHandler = (event: TouchEvent, sendFn: (data: OffscreenPayload) => void) => { | ||
| const touches = []; | ||
|
|
||
| // eslint-disable-next-line @typescript-eslint/prefer-for-of | ||
| for (let i = 0; i < event.touches.length; ++i) { | ||
| const touch = event.touches[i]; | ||
| touches.push({ | ||
| pageX: touch.pageX, | ||
| pageY: touch.pageY, | ||
| }); | ||
| } | ||
| const payload = new OffscreenPayload({ | ||
| event: { | ||
| type: event.type, | ||
| touches | ||
| } | ||
| }); | ||
| sendFn(payload); | ||
| }; | ||
|
|
||
| // The four arrow keys | ||
| export const orbitKeys: AssociatedArrayType<boolean> = { | ||
| '37': true, // left | ||
| '38': true, // up | ||
| '39': true, // right | ||
| '40': true, // down | ||
| }; | ||
|
|
||
| export const filteredKeydownEventHandler = (event: KeyboardEvent, sendFn: (data: OffscreenPayload) => void) => { | ||
| const { code } = event; | ||
| if (orbitKeys[code]) { | ||
| event.preventDefault(); | ||
| keydownEventHandler(event, sendFn); | ||
| } | ||
| }; | ||
|
|
||
| export const mouseEventHandler = makeSendPropertiesHandler([ | ||
| 'ctrlKey', | ||
| 'metaKey', | ||
| 'shiftKey', | ||
| 'button', | ||
| 'clientX', | ||
| 'clientY', | ||
| 'pageX', | ||
| 'pageY', | ||
| ]); | ||
|
|
||
| export const wheelEventHandlerImpl = makeSendPropertiesHandler([ | ||
| 'deltaX', | ||
| 'deltaY', | ||
| ]); | ||
|
|
||
| export const keydownEventHandler = makeSendPropertiesHandler([ | ||
| 'ctrlKey', | ||
| 'metaKey', | ||
| 'shiftKey', | ||
| 'keyCode', | ||
| ]); | ||
|
|
||
| // function sendSize() { | ||
| // const rect = element.getBoundingClientRect(); | ||
| // sendEvent({ | ||
| // type: 'size', | ||
| // left: rect.left, | ||
| // top: rect.top, | ||
| // width: element.clientWidth, | ||
| // height: element.clientHeight, | ||
| // }); | ||
| // } | ||
|
|
||
| // // really need to use ResizeObserver | ||
| // window.addEventListener('resize', sendSize); | ||
| // } | ||
|
|
||
| export const registerCanvas = (canvas: HTMLCanvasElement, workerTask: WorkerTask) => { | ||
| canvas.focus(); | ||
|
|
||
| const offscreenPayload = new OffscreenPayload({ | ||
| event: { | ||
| type: 'init' | ||
| } | ||
| }); | ||
| workerTask.sentMessage(WorkerTaskMessage.fromPayload(offscreenPayload), 'proxyStart'); | ||
|
|
||
| const eventHandlers = { | ||
| contextmenu: preventDefaultHandler, | ||
| mousedown: mouseEventHandler, | ||
| mousemove: mouseEventHandler, | ||
| mouseup: mouseEventHandler, | ||
| touchstart: touchEventHandler, | ||
| touchmove: touchEventHandler, | ||
| touchend: touchEventHandler, | ||
| wheel: wheelEventHandler, | ||
| keydown: filteredKeydownEventHandler, | ||
| }; | ||
|
|
||
| for (const [eventName, handler] of Object.entries(eventHandlers)) { | ||
| // eslint-disable-next-line @typescript-eslint/no-explicit-any | ||
| canvas.addEventListener(eventName, function(event: any) { | ||
| handler(event, (offscreenPayload: OffscreenPayload) => { | ||
| workerTask.sentMessage(WorkerTaskMessage.fromPayload(offscreenPayload), 'proxyEvent'); | ||
| }); | ||
| }); | ||
| } | ||
| }; |
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