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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | 1x 1x 1x 1x 4x 4x 4x 4x 4x 4x 4x 4x 3x 1x 2x 1x 1x 1x 1x 4x 4x 1x 3x 4x 1x | import { Doraemon } from '../instance/init' import { isPromise } from '../util/isPromise' const hyphenateRE = /\B([A-Z])/g const hyphenate = (str: string) => str.replace(hyphenateRE, '-$1').toLowerCase() /** * decorator of an event-emitter function * * @param event The name of the event * @return MethodDecorator */ export function Emit(event?: string): MethodDecorator { return function (_target: Doraemon, propertyKey: string, descriptor: any) { const key = hyphenate(propertyKey) const original = descriptor.value descriptor.value = function emitter(...args: any[]) { const emit = (returnValue: any) => { const emitName = event || key if (returnValue === undefined) { if (args.length === 0) { this.$emit(emitName) } else if (args.length === 1) { this.$emit(emitName, args[0]) } else { this.$emit(emitName, ...args) } } else { args.unshift(returnValue) this.$emit(emitName, ...args) } } const returnValue: any = original.apply(this, args) if (isPromise(returnValue)) { returnValue.then(emit) } else { emit(returnValue) } return returnValue } } } |