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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 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 | 84x 84x 84x 84x 84x 4848x 4848x 4848x 4848x 4753x 4848x 84x 2x 84x 2x 84x 84x 196x 144x 144x 216x 187x 216x 216x 216x 216x 187x 216x 216x 216x 144x 144x 144x 144x 16x 144x | import { ComponentInternalInstance } from './component'
import { devtoolsComponentUpdated } from './devtools'
import { setBlockTracking } from './vnode'
/**
* mark the current rendering instance for asset resolution (e.g.
* resolveComponent, resolveDirective) during render
*/
export let currentRenderingInstance: ComponentInternalInstance | null = null
export let currentScopeId: string | null = null
/**
* Note: rendering calls maybe nested. The function returns the parent rendering
* instance if present, which should be restored after the render is done:
*
* ```js
* const prev = setCurrentRenderingInstance(i)
* // ...render
* setCurrentRenderingInstance(prev)
* ```
*/
export function setCurrentRenderingInstance(
instance: ComponentInternalInstance | null
): ComponentInternalInstance | null {
const prev = currentRenderingInstance
currentRenderingInstance = instance
currentScopeId = (instance && instance.type.__scopeId) || null
// v2 pre-compiled components uses _scopeId instead of __scopeId
if (__COMPAT__ && !currentScopeId) {
currentScopeId = (instance && (instance.type as any)._scopeId) || null
}
return prev
}
/**
* Set scope id when creating hoisted vnodes.
* @private compiler helper
*/
export function pushScopeId(id: string | null) {
currentScopeId = id
}
/**
* Technically we no longer need this after 3.0.8 but we need to keep the same
* API for backwards compat w/ code generated by compilers.
* @private
*/
export function popScopeId() {
currentScopeId = null
}
/**
* Only for backwards compat
* @private
*/
export const withScopeId = (_id: string) => withCtx
export type ContextualRenderFn = {
(...args: any[]): any
_n: boolean /* already normalized */
_c: boolean /* compiled */
_d: boolean /* disableTracking */
_ns: boolean /* nonScoped */
}
/**
* Wrap a slot function to memoize current rendering instance
* @private compiler helper
*/
export function withCtx(
fn: Function,
ctx: ComponentInternalInstance | null = currentRenderingInstance,
isNonScopedSlot?: boolean // __COMPAT__ only
) {
if (!ctx) return fn
// already normalized
Iif ((fn as ContextualRenderFn)._n) {
return fn
}
const renderFnWithContext: ContextualRenderFn = (...args: any[]) => {
// If a user calls a compiled slot inside a template expression (#1745), it
// can mess up block tracking, so by default we disable block tracking and
// force bail out when invoking a compiled slot (indicated by the ._d flag).
// This isn't necessary if rendering a compiled `<slot>`, so we flip the
// ._d flag off when invoking the wrapped fn inside `renderSlot`.
if (renderFnWithContext._d) {
setBlockTracking(-1)
}
const prevInstance = setCurrentRenderingInstance(ctx)
const res = fn(...args)
setCurrentRenderingInstance(prevInstance)
if (renderFnWithContext._d) {
setBlockTracking(1)
}
if (__DEV__ || __FEATURE_PROD_DEVTOOLS__) {
devtoolsComponentUpdated(ctx)
}
return res
}
// mark normalized to avoid duplicated wrapping
renderFnWithContext._n = true
// mark this as compiled by default
// this is used in vnode.ts -> normalizeChildren() to set the slot
// rendering flag.
renderFnWithContext._c = true
// disable block tracking by default
renderFnWithContext._d = true
// compat build only flag to distinguish scoped slots from non-scoped ones
if (__COMPAT__ && isNonScopedSlot) {
renderFnWithContext._ns = true
}
return renderFnWithContext
}
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