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import { SuspenseBoundary } from './Suspense'
import {
RendererInternals,
MoveType,
RendererElement,
RendererNode,
RendererOptions,
traverseStaticChildren
} from '../renderer'
import { VNode, VNodeArrayChildren, VNodeProps } from '../vnode'
import { isString, ShapeFlags } from '@vue/shared'
import { warn } from '../warning'
import { isHmrUpdating } from '../hmr'
export type TeleportVNode = VNode<RendererNode, RendererElement, TeleportProps>
export interface TeleportProps {
to: string | RendererElement | null | undefined
disabled?: boolean
}
export const isTeleport = (type: any): boolean => type.__isTeleport
const isTeleportDisabled = (props: VNode['props']): boolean =>
props && (props.disabled || props.disabled === '')
const isTargetSVG = (target: RendererElement): boolean =>
typeof SVGElement !== 'undefined' && target instanceof SVGElement
const resolveTarget = <T = RendererElement>(
props: TeleportProps | null,
select: RendererOptions['querySelector']
): T | null => {
const targetSelector = props && props.to
if (isString(targetSelector)) {
Iif (!select) {
__DEV__ &&
warn(
`Current renderer does not support string target for Teleports. ` +
`(missing querySelector renderer option)`
)
return null
} else {
const target = select(targetSelector)
Iif (!target) {
__DEV__ &&
warn(
`Failed to locate Teleport target with selector "${targetSelector}". ` +
`Note the target element must exist before the component is mounted - ` +
`i.e. the target cannot be rendered by the component itself, and ` +
`ideally should be outside of the entire Vue component tree.`
)
}
return target as any
}
} else {
Iif (__DEV__ && !targetSelector && !isTeleportDisabled(props)) {
warn(`Invalid Teleport target: ${targetSelector}`)
}
return targetSelector as any
}
}
export const TeleportImpl = {
__isTeleport: true,
process(
n1: TeleportVNode | null,
n2: TeleportVNode,
container: RendererElement,
anchor: RendererNode | null,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
isSVG: boolean,
slotScopeIds: string[] | null,
optimized: boolean,
internals: RendererInternals
) {
const {
mc: mountChildren,
pc: patchChildren,
pbc: patchBlockChildren,
o: { insert, querySelector, createText, createComment }
} = internals
const disabled = isTeleportDisabled(n2.props)
let { shapeFlag, children, dynamicChildren } = n2
// #3302
// HMR updated, force full diff
if (__DEV__ && isHmrUpdating) {
optimized = false
dynamicChildren = null
}
if (n1 == null) {
// insert anchors in the main view
const placeholder = (n2.el = __DEV__
? createComment('teleport start')
: createText(''))
const mainAnchor = (n2.anchor = __DEV__
? createComment('teleport end')
: createText(''))
insert(placeholder, container, anchor)
insert(mainAnchor, container, anchor)
const target = (n2.target = resolveTarget(n2.props, querySelector))
const targetAnchor = (n2.targetAnchor = createText(''))
if (target) {
insert(targetAnchor, target)
// #2652 we could be teleporting from a non-SVG tree into an SVG tree
isSVG = isSVG || isTargetSVG(target)
} else Iif (__DEV__ && !disabled) {
warn('Invalid Teleport target on mount:', target, `(${typeof target})`)
}
const mount = (container: RendererElement, anchor: RendererNode) => {
// Teleport *always* has Array children. This is enforced in both the
// compiler and vnode children normalization.
if (shapeFlag & ShapeFlags.ARRAY_CHILDREN) {
mountChildren(
children as VNodeArrayChildren,
container,
anchor,
parentComponent,
parentSuspense,
isSVG,
slotScopeIds,
optimized
)
}
}
if (disabled) {
mount(container, mainAnchor)
} else if (target) {
mount(target, targetAnchor)
}
} else {
// update content
n2.el = n1.el
const mainAnchor = (n2.anchor = n1.anchor)!
const target = (n2.target = n1.target)!
const targetAnchor = (n2.targetAnchor = n1.targetAnchor)!
const wasDisabled = isTeleportDisabled(n1.props)
const currentContainer = wasDisabled ? container : target
const currentAnchor = wasDisabled ? mainAnchor : targetAnchor
isSVG = isSVG || isTargetSVG(target)
if (dynamicChildren) {
// fast path when the teleport happens to be a block root
patchBlockChildren(
n1.dynamicChildren!,
dynamicChildren,
currentContainer,
parentComponent,
parentSuspense,
isSVG,
slotScopeIds
)
// even in block tree mode we need to make sure all root-level nodes
// in the teleport inherit previous DOM references so that they can
// be moved in future patches.
traverseStaticChildren(n1, n2, true)
} else if (!optimized) {
patchChildren(
n1,
n2,
currentContainer,
currentAnchor,
parentComponent,
parentSuspense,
isSVG,
slotScopeIds,
false
)
}
if (disabled) {
if (!wasDisabled) {
// enabled -> disabled
// move into main container
moveTeleport(
n2,
container,
mainAnchor,
internals,
TeleportMoveTypes.TOGGLE
)
}
} else {
// target changed
if ((n2.props && n2.props.to) !== (n1.props && n1.props.to)) {
const nextTarget = (n2.target = resolveTarget(
n2.props,
querySelector
))
if (nextTarget) {
moveTeleport(
n2,
nextTarget,
null,
internals,
TeleportMoveTypes.TARGET_CHANGE
)
} else IEif (__DEV__) {
warn(
'Invalid Teleport target on update:',
target,
`(${typeof target})`
)
}
} else if (wasDisabled) {
// disabled -> enabled
// move into teleport target
moveTeleport(
n2,
target,
targetAnchor,
internals,
TeleportMoveTypes.TOGGLE
)
}
}
}
},
remove(
vnode: VNode,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
optimized: boolean,
{ um: unmount, o: { remove: hostRemove } }: RendererInternals,
doRemove: Boolean
) {
const { shapeFlag, children, anchor, targetAnchor, target, props } = vnode
if (target) {
hostRemove(targetAnchor!)
}
// an unmounted teleport should always remove its children if not disabled
if (doRemove || !isTeleportDisabled(props)) {
hostRemove(anchor!)
if (shapeFlag & ShapeFlags.ARRAY_CHILDREN) {
for (let i = 0; i < (children as VNode[]).length; i++) {
const child = (children as VNode[])[i]
unmount(
child,
parentComponent,
parentSuspense,
true,
!!child.dynamicChildren
)
}
}
}
},
move: moveTeleport,
hydrate: hydrateTeleport
}
export const enum TeleportMoveTypes {
TARGET_CHANGE,
TOGGLE, // enable / disable
REORDER // moved in the main view
}
function moveTeleport(
vnode: VNode,
container: RendererElement,
parentAnchor: RendererNode | null,
{ o: { insert }, m: move }: RendererInternals,
moveType: TeleportMoveTypes = TeleportMoveTypes.REORDER
) {
// move target anchor if this is a target change.
if (moveType === TeleportMoveTypes.TARGET_CHANGE) {
insert(vnode.targetAnchor!, container, parentAnchor)
}
const { el, anchor, shapeFlag, children, props } = vnode
const isReorder = moveType === TeleportMoveTypes.REORDER
// move main view anchor if this is a re-order.
if (isReorder) {
insert(el!, container, parentAnchor)
}
// if this is a re-order and teleport is enabled (content is in target)
// do not move children. So the opposite is: only move children if this
// is not a reorder, or the teleport is disabled
if (!isReorder || isTeleportDisabled(props)) {
// Teleport has either Array children or no children.
if (shapeFlag & ShapeFlags.ARRAY_CHILDREN) {
for (let i = 0; i < (children as VNode[]).length; i++) {
move(
(children as VNode[])[i],
container,
parentAnchor,
MoveType.REORDER
)
}
}
}
// move main view anchor if this is a re-order.
if (isReorder) {
insert(anchor!, container, parentAnchor)
}
}
interface TeleportTargetElement extends Element {
// last teleport target
_lpa?: Node | null
}
function hydrateTeleport(
node: Node,
vnode: TeleportVNode,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
slotScopeIds: string[] | null,
optimized: boolean,
{
o: { nextSibling, parentNode, querySelector }
}: RendererInternals<Node, Element>,
hydrateChildren: (
node: Node | null,
vnode: VNode,
container: Element,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
slotScopeIds: string[] | null,
optimized: boolean
) => Node | null
): Node | null {
const target = (vnode.target = resolveTarget<Element>(
vnode.props,
querySelector
))
if (target) {
// if multiple teleports rendered to the same target element, we need to
// pick up from where the last teleport finished instead of the first node
const targetNode =
(target as TeleportTargetElement)._lpa || target.firstChild
if (vnode.shapeFlag & ShapeFlags.ARRAY_CHILDREN) {
if (isTeleportDisabled(vnode.props)) {
vnode.anchor = hydrateChildren(
nextSibling(node),
vnode,
parentNode(node)!,
parentComponent,
parentSuspense,
slotScopeIds,
optimized
)
vnode.targetAnchor = targetNode
} else {
vnode.anchor = nextSibling(node)
vnode.targetAnchor = hydrateChildren(
targetNode,
vnode,
target,
parentComponent,
parentSuspense,
slotScopeIds,
optimized
)
}
;(target as TeleportTargetElement)._lpa =
vnode.targetAnchor && nextSibling(vnode.targetAnchor as Node)
}
}
return vnode.anchor && nextSibling(vnode.anchor as Node)
}
// Force-casted public typing for h and TSX props inference
export const Teleport = TeleportImpl as any as {
__isTeleport: true
new (): { $props: VNodeProps & TeleportProps }
}
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