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Runtime helper for applying directives to a vnode. Example usage:
const comp = resolveComponent('comp')
const foo = resolveDirective('foo')
const bar = resolveDirective('bar')
return withDirectives(h(comp), [
[foo, this.x],
[bar, this.y]
])
*/
import { VNode } from './vnode'
import { isFunction, EMPTY_OBJ, isBuiltInDirective } from '@vue/shared'
import { warn } from './warning'
import { ComponentInternalInstance, Data, getExposeProxy } from './component'
import { currentRenderingInstance } from './componentRenderContext'
import { callWithAsyncErrorHandling, ErrorCodes } from './errorHandling'
import { ComponentPublicInstance } from './componentPublicInstance'
import { mapCompatDirectiveHook } from './compat/customDirective'
import { pauseTracking, resetTracking } from '@vue/reactivity'
import { traverse } from './apiWatch'
export interface DirectiveBinding<V = any> {
instance: ComponentPublicInstance | null
value: V
oldValue: V | null
arg?: string
modifiers: DirectiveModifiers
dir: ObjectDirective<any, V>
}
export type DirectiveHook<T = any, Prev = VNode<any, T> | null, V = any> = (
el: T,
binding: DirectiveBinding<V>,
vnode: VNode<any, T>,
prevVNode: Prev
) => void
export type SSRDirectiveHook = (
binding: DirectiveBinding,
vnode: VNode
) => Data | undefined
export interface ObjectDirective<T = any, V = any> {
created?: DirectiveHook<T, null, V>
beforeMount?: DirectiveHook<T, null, V>
mounted?: DirectiveHook<T, null, V>
beforeUpdate?: DirectiveHook<T, VNode<any, T>, V>
updated?: DirectiveHook<T, VNode<any, T>, V>
beforeUnmount?: DirectiveHook<T, null, V>
unmounted?: DirectiveHook<T, null, V>
getSSRProps?: SSRDirectiveHook
deep?: boolean
}
export type FunctionDirective<T = any, V = any> = DirectiveHook<T, any, V>
export type Directive<T = any, V = any> =
| ObjectDirective<T, V>
| FunctionDirective<T, V>
export type DirectiveModifiers = Record<string, boolean>
export function validateDirectiveName(name: string) {
if (isBuiltInDirective(name)) {
warn('Do not use built-in directive ids as custom directive id: ' + name)
}
}
// Directive, value, argument, modifiers
export type DirectiveArguments = Array<
| [Directive | undefined]
| [Directive | undefined, any]
| [Directive | undefined, any, string]
| [Directive | undefined, any, string, DirectiveModifiers]
>
/**
* Adds directives to a VNode.
*/
export function withDirectives<T extends VNode>(
vnode: T,
directives: DirectiveArguments
): T {
const internalInstance = currentRenderingInstance
Iif (internalInstance === null) {
__DEV__ && warn(`withDirectives can only be used inside render functions.`)
return vnode
}
const instance =
(getExposeProxy(internalInstance) as ComponentPublicInstance) ||
internalInstance.proxy
const bindings: DirectiveBinding[] = vnode.dirs || (vnode.dirs = [])
for (let i = 0; i < directives.length; i++) {
let [dir, value, arg, modifiers = EMPTY_OBJ] = directives[i]
if (dir) {
if (isFunction(dir)) {
dir = {
mounted: dir,
updated: dir
} as ObjectDirective
}
if (dir.deep) {
traverse(value)
}
bindings.push({
dir,
instance,
value,
oldValue: void 0,
arg,
modifiers
})
}
}
return vnode
}
export function invokeDirectiveHook(
vnode: VNode,
prevVNode: VNode | null,
instance: ComponentInternalInstance | null,
name: keyof ObjectDirective
) {
const bindings = vnode.dirs!
const oldBindings = prevVNode && prevVNode.dirs!
for (let i = 0; i < bindings.length; i++) {
const binding = bindings[i]
if (oldBindings) {
binding.oldValue = oldBindings[i].value
}
let hook = binding.dir[name] as DirectiveHook | DirectiveHook[] | undefined
if (__COMPAT__ && !hook) {
hook = mapCompatDirectiveHook(name, binding.dir, instance)
}
if (hook) {
// disable tracking inside all lifecycle hooks
// since they can potentially be called inside effects.
pauseTracking()
callWithAsyncErrorHandling(hook, instance, ErrorCodes.DIRECTIVE_HOOK, [
vnode.el,
binding,
vnode,
prevVNode
])
resetTracking()
}
}
}
|