1273 lines
36 KiB
TypeScript
1273 lines
36 KiB
TypeScript
import { autorun, stop } from '@vue/observer'
|
|
import { queueJob } from '@vue/scheduler'
|
|
import { VNodeFlags, ChildrenFlags } from './flags'
|
|
import { EMPTY_OBJ, isReservedProp, lis } from './utils'
|
|
import {
|
|
VNode,
|
|
MountedVNode,
|
|
MountedVNodes,
|
|
RenderNode,
|
|
createTextVNode,
|
|
cloneVNode,
|
|
Ref,
|
|
VNodeChildren,
|
|
RenderFragment
|
|
} from './vdom'
|
|
import {
|
|
MountedComponent,
|
|
FunctionalComponent,
|
|
ComponentClass
|
|
} from './component'
|
|
import { updateProps } from './componentProps'
|
|
import {
|
|
renderInstanceRoot,
|
|
createComponentInstance,
|
|
teardownComponentInstance,
|
|
normalizeComponentRoot,
|
|
shouldUpdateFunctionalComponent
|
|
} from './componentUtils'
|
|
|
|
interface NodeOps {
|
|
createElement: (tag: string, isSVG?: boolean) => any
|
|
createText: (text: string) => any
|
|
setText: (node: any, text: string) => void
|
|
appendChild: (parent: any, child: any) => void
|
|
insertBefore: (parent: any, child: any, ref: any) => void
|
|
replaceChild: (parent: any, oldChild: any, newChild: any) => void
|
|
removeChild: (parent: any, child: any) => void
|
|
clearContent: (node: any) => void
|
|
parentNode: (node: any) => any
|
|
nextSibling: (node: any) => any
|
|
querySelector: (selector: string) => any
|
|
}
|
|
|
|
interface PatchDataFunction {
|
|
(
|
|
el: any,
|
|
key: string,
|
|
prevValue: any,
|
|
nextValue: any,
|
|
preVNode: VNode | null,
|
|
nextVNode: VNode,
|
|
isSVG: boolean,
|
|
// passed for DOM operations that removes child content
|
|
// e.g. innerHTML & textContent
|
|
unmountChildren: (children: VNode[], childFlags: ChildrenFlags) => void
|
|
): void
|
|
}
|
|
|
|
interface RendererOptions {
|
|
nodeOps: NodeOps
|
|
patchData: PatchDataFunction
|
|
teardownVNode?: (vnode: VNode) => void
|
|
}
|
|
|
|
// The whole mounting / patching / unmouting logic is placed inside this
|
|
// single function so that we can create multiple renderes with different
|
|
// platform definitions. This allows for use cases like creating a test
|
|
// renderer alongside an actual renderer.
|
|
export function createRenderer(options: RendererOptions) {
|
|
const {
|
|
nodeOps: {
|
|
createElement: platformCreateElement,
|
|
createText: platformCreateText,
|
|
setText: platformSetText,
|
|
appendChild: platformAppendChild,
|
|
insertBefore: platformInsertBefore,
|
|
replaceChild: platformReplaceChild,
|
|
removeChild: platformRemoveChild,
|
|
clearContent: platformClearContent,
|
|
parentNode: platformParentNode,
|
|
nextSibling: platformNextSibling,
|
|
querySelector: platformQuerySelector
|
|
},
|
|
patchData: platformPatchData,
|
|
teardownVNode
|
|
} = options
|
|
|
|
// Node operations (shimmed to handle virtual fragments) ---------------------
|
|
|
|
function appendChild(container: RenderNode, el: RenderNode | RenderFragment) {
|
|
if (el.$f) {
|
|
for (let i = 0; i < el.children.length; i++) {
|
|
appendChild(container, el.children[i])
|
|
}
|
|
} else {
|
|
platformAppendChild(container, el)
|
|
}
|
|
}
|
|
|
|
function insertBefore(
|
|
container: RenderNode,
|
|
el: RenderNode | RenderFragment,
|
|
ref: RenderNode | RenderFragment
|
|
) {
|
|
while (ref.$f) {
|
|
ref = ref.children[0]
|
|
}
|
|
if (el.$f) {
|
|
for (let i = 0; i < el.children.length; i++) {
|
|
insertBefore(container, el.children[i], ref)
|
|
}
|
|
} else {
|
|
platformInsertBefore(container, el, ref)
|
|
}
|
|
}
|
|
|
|
function removeChild(container: RenderNode, el: RenderNode | RenderFragment) {
|
|
if (el.$f) {
|
|
for (let i = 0; i < el.children.length; i++) {
|
|
removeChild(container, el.children[i])
|
|
}
|
|
} else {
|
|
platformRemoveChild(container, el)
|
|
}
|
|
}
|
|
|
|
function replaceChild(
|
|
container: RenderNode,
|
|
oldChild: RenderNode | RenderFragment,
|
|
newChild: RenderNode | RenderFragment
|
|
) {
|
|
if (oldChild.$f || newChild.$f) {
|
|
insertOrAppend(container, newChild, oldChild)
|
|
removeChild(container, oldChild)
|
|
} else {
|
|
platformReplaceChild(container, oldChild, newChild)
|
|
}
|
|
}
|
|
|
|
function parentNode(el: RenderNode | RenderFragment): RenderNode {
|
|
while (el.$f) {
|
|
el = el.children[0]
|
|
}
|
|
return platformParentNode(el)
|
|
}
|
|
|
|
function insertOrAppend(
|
|
container: RenderNode,
|
|
newNode: RenderNode | RenderFragment,
|
|
refNode: RenderNode | RenderFragment | null
|
|
) {
|
|
if (refNode === null) {
|
|
appendChild(container, newNode)
|
|
} else {
|
|
insertBefore(container, newNode, refNode)
|
|
}
|
|
}
|
|
|
|
// lifecycle hooks -----------------------------------------------------------
|
|
|
|
const hooks: Function[] = []
|
|
|
|
function queueHook(fn: Function) {
|
|
hooks.push(fn)
|
|
}
|
|
|
|
function flushHooks() {
|
|
let fn
|
|
while ((fn = hooks.shift())) {
|
|
fn()
|
|
}
|
|
}
|
|
|
|
// mounting ------------------------------------------------------------------
|
|
|
|
function mount(
|
|
vnode: VNode,
|
|
container: RenderNode | null,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean,
|
|
endNode: RenderNode | RenderFragment | null
|
|
): RenderNode | RenderFragment {
|
|
const { flags } = vnode
|
|
if (flags & VNodeFlags.ELEMENT) {
|
|
return mountElement(vnode, container, parentComponent, isSVG, endNode)
|
|
} else if (flags & VNodeFlags.COMPONENT) {
|
|
return mountComponent(vnode, container, parentComponent, isSVG, endNode)
|
|
} else if (flags & VNodeFlags.TEXT) {
|
|
return mountText(vnode, container, endNode)
|
|
} else if (flags & VNodeFlags.FRAGMENT) {
|
|
return mountFragment(vnode, container, parentComponent, isSVG, endNode)
|
|
} else if (flags & VNodeFlags.PORTAL) {
|
|
return mountPortal(vnode, container, parentComponent)
|
|
} else {
|
|
return platformCreateText('')
|
|
}
|
|
}
|
|
|
|
function mountArrayChildren(
|
|
children: VNode[],
|
|
container: RenderNode | null,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean,
|
|
endNode: RenderNode | RenderFragment | null
|
|
) {
|
|
for (let i = 0; i < children.length; i++) {
|
|
let child = children[i]
|
|
if (child.el) {
|
|
children[i] = child = cloneVNode(child)
|
|
}
|
|
mount(children[i], container, parentComponent, isSVG, endNode)
|
|
}
|
|
}
|
|
|
|
function mountElement(
|
|
vnode: VNode,
|
|
container: RenderNode | null,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean,
|
|
endNode: RenderNode | RenderFragment | null
|
|
): RenderNode {
|
|
const { flags, tag, data, children, childFlags, ref } = vnode
|
|
isSVG = isSVG || (flags & VNodeFlags.ELEMENT_SVG) > 0
|
|
const el = (vnode.el = platformCreateElement(tag as string, isSVG))
|
|
if (data != null) {
|
|
for (const key in data) {
|
|
patchData(el, key, null, data[key], null, vnode, isSVG)
|
|
}
|
|
}
|
|
if (childFlags !== ChildrenFlags.NO_CHILDREN) {
|
|
const hasSVGChildren = isSVG && tag !== 'foreignObject'
|
|
if (childFlags & ChildrenFlags.SINGLE_VNODE) {
|
|
mount(children as VNode, el, parentComponent, hasSVGChildren, endNode)
|
|
} else if (childFlags & ChildrenFlags.MULTIPLE_VNODES) {
|
|
mountArrayChildren(
|
|
children as VNode[],
|
|
el,
|
|
parentComponent,
|
|
hasSVGChildren,
|
|
endNode
|
|
)
|
|
}
|
|
}
|
|
if (container != null) {
|
|
insertOrAppend(container, el, endNode)
|
|
}
|
|
if (ref) {
|
|
mountRef(ref, el)
|
|
}
|
|
return el
|
|
}
|
|
|
|
function mountRef(ref: Ref, el: RenderNode | MountedComponent) {
|
|
queueHook(() => {
|
|
ref(el)
|
|
})
|
|
}
|
|
|
|
function mountComponent(
|
|
vnode: VNode,
|
|
container: RenderNode | null,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean,
|
|
endNode: RenderNode | RenderFragment | null
|
|
): RenderNode | RenderFragment {
|
|
let el: RenderNode | RenderFragment
|
|
const { flags, tag, data, slots } = vnode
|
|
if (flags & VNodeFlags.COMPONENT_STATEFUL) {
|
|
el = mountComponentInstance(
|
|
vnode,
|
|
tag as ComponentClass,
|
|
null,
|
|
parentComponent,
|
|
isSVG,
|
|
endNode
|
|
)
|
|
} else {
|
|
// functional component
|
|
const subTree = (vnode.children = normalizeComponentRoot(
|
|
(tag as FunctionalComponent)(data || EMPTY_OBJ, slots || EMPTY_OBJ),
|
|
vnode
|
|
))
|
|
el = vnode.el = mount(subTree, null, parentComponent, isSVG, null)
|
|
}
|
|
if (container != null) {
|
|
insertOrAppend(container, el, endNode)
|
|
}
|
|
return el
|
|
}
|
|
|
|
function mountText(
|
|
vnode: VNode,
|
|
container: RenderNode | null,
|
|
endNode: RenderNode | RenderFragment | null
|
|
): RenderNode {
|
|
const el = (vnode.el = platformCreateText(vnode.children as string))
|
|
if (container != null) {
|
|
insertOrAppend(container, el, endNode)
|
|
}
|
|
return el
|
|
}
|
|
|
|
function mountFragment(
|
|
vnode: VNode,
|
|
container: RenderNode | null,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean,
|
|
endNode: RenderNode | RenderFragment | null
|
|
): RenderFragment {
|
|
const { children, childFlags } = vnode
|
|
const fragment: RenderFragment = (vnode.el = {
|
|
$f: true,
|
|
children: []
|
|
})
|
|
const fragmentChildren = fragment.children
|
|
if (childFlags & ChildrenFlags.SINGLE_VNODE) {
|
|
fragmentChildren.push(
|
|
mount(children as VNode, container, parentComponent, isSVG, endNode)
|
|
)
|
|
} else if (childFlags & ChildrenFlags.MULTIPLE_VNODES) {
|
|
mountArrayChildren(
|
|
children as VNode[],
|
|
container,
|
|
parentComponent,
|
|
isSVG,
|
|
endNode
|
|
)
|
|
for (let i = 0; i < (children as MountedVNodes).length; i++) {
|
|
fragmentChildren.push((children as MountedVNodes)[i].el)
|
|
}
|
|
} else {
|
|
// ensure at least one children so that it can be used as a ref node
|
|
// during insertions
|
|
fragmentChildren.push(mountText(createTextVNode(''), container, endNode))
|
|
}
|
|
return fragment
|
|
}
|
|
|
|
function mountPortal(
|
|
vnode: VNode,
|
|
container: RenderNode | null,
|
|
parentComponent: MountedComponent | null
|
|
): RenderNode {
|
|
const { tag, children, childFlags, ref } = vnode
|
|
const target = typeof tag === 'string' ? platformQuerySelector(tag) : tag
|
|
|
|
if (__DEV__ && !target) {
|
|
// TODO warn poartal target not found
|
|
}
|
|
|
|
if (childFlags & ChildrenFlags.SINGLE_VNODE) {
|
|
mount(
|
|
children as VNode,
|
|
target as RenderNode,
|
|
parentComponent,
|
|
false,
|
|
null
|
|
)
|
|
} else if (childFlags & ChildrenFlags.MULTIPLE_VNODES) {
|
|
mountArrayChildren(
|
|
children as VNode[],
|
|
target as RenderNode,
|
|
parentComponent,
|
|
false,
|
|
null
|
|
)
|
|
}
|
|
if (ref) {
|
|
mountRef(ref, target as RenderNode)
|
|
}
|
|
return (vnode.el = mountText(createTextVNode(''), container, null))
|
|
}
|
|
|
|
// patching ------------------------------------------------------------------
|
|
|
|
function patchData(
|
|
el: RenderNode,
|
|
key: string,
|
|
prevValue: any,
|
|
nextValue: any,
|
|
preVNode: VNode | null,
|
|
nextVNode: VNode,
|
|
isSVG: boolean
|
|
) {
|
|
if (isReservedProp(key)) {
|
|
return
|
|
}
|
|
platformPatchData(
|
|
el,
|
|
key,
|
|
prevValue,
|
|
nextValue,
|
|
preVNode,
|
|
nextVNode,
|
|
isSVG,
|
|
unmountChildren
|
|
)
|
|
}
|
|
|
|
function patch(
|
|
prevVNode: VNode,
|
|
nextVNode: VNode,
|
|
container: RenderNode,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean
|
|
) {
|
|
const nextFlags = nextVNode.flags
|
|
const prevFlags = prevVNode.flags
|
|
|
|
if (prevFlags !== nextFlags) {
|
|
replaceVNode(prevVNode, nextVNode, container, parentComponent, isSVG)
|
|
} else if (nextFlags & VNodeFlags.ELEMENT) {
|
|
patchElement(prevVNode, nextVNode, container, parentComponent, isSVG)
|
|
} else if (nextFlags & VNodeFlags.COMPONENT) {
|
|
patchComponent(prevVNode, nextVNode, container, parentComponent, isSVG)
|
|
} else if (nextFlags & VNodeFlags.TEXT) {
|
|
patchText(prevVNode, nextVNode)
|
|
} else if (nextFlags & VNodeFlags.FRAGMENT) {
|
|
patchFragment(prevVNode, nextVNode, container, parentComponent, isSVG)
|
|
} else if (nextFlags & VNodeFlags.PORTAL) {
|
|
patchPortal(prevVNode, nextVNode, parentComponent)
|
|
}
|
|
}
|
|
|
|
function patchElement(
|
|
prevVNode: VNode,
|
|
nextVNode: VNode,
|
|
container: RenderNode,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean
|
|
) {
|
|
const { flags, tag } = nextVNode
|
|
isSVG = isSVG || (flags & VNodeFlags.ELEMENT_SVG) > 0
|
|
|
|
if (prevVNode.tag !== tag) {
|
|
replaceVNode(prevVNode, nextVNode, container, parentComponent, isSVG)
|
|
return
|
|
}
|
|
|
|
const el = (nextVNode.el = prevVNode.el) as RenderNode
|
|
|
|
// data
|
|
const prevData = prevVNode.data
|
|
const nextData = nextVNode.data
|
|
if (prevData !== nextData) {
|
|
const prevDataOrEmpty = prevData || EMPTY_OBJ
|
|
const nextDataOrEmpty = nextData || EMPTY_OBJ
|
|
if (nextDataOrEmpty !== EMPTY_OBJ) {
|
|
for (const key in nextDataOrEmpty) {
|
|
const prevValue = prevDataOrEmpty[key]
|
|
const nextValue = nextDataOrEmpty[key]
|
|
if (prevValue !== nextValue) {
|
|
patchData(
|
|
el,
|
|
key,
|
|
prevValue,
|
|
nextValue,
|
|
prevVNode,
|
|
nextVNode,
|
|
isSVG
|
|
)
|
|
}
|
|
}
|
|
}
|
|
if (prevDataOrEmpty !== EMPTY_OBJ) {
|
|
for (const key in prevDataOrEmpty) {
|
|
const prevValue = prevDataOrEmpty[key]
|
|
if (prevValue != null && !nextDataOrEmpty.hasOwnProperty(key)) {
|
|
patchData(el, key, prevValue, null, prevVNode, nextVNode, isSVG)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// children
|
|
patchChildren(
|
|
prevVNode.childFlags,
|
|
nextVNode.childFlags,
|
|
prevVNode.children,
|
|
nextVNode.children,
|
|
el,
|
|
parentComponent,
|
|
isSVG && nextVNode.tag !== 'foreignObject',
|
|
null
|
|
)
|
|
}
|
|
|
|
function patchComponent(
|
|
prevVNode: VNode,
|
|
nextVNode: VNode,
|
|
container: RenderNode,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean
|
|
) {
|
|
const { tag, flags } = nextVNode
|
|
if (tag !== prevVNode.tag) {
|
|
replaceVNode(prevVNode, nextVNode, container, parentComponent, isSVG)
|
|
} else if (flags & VNodeFlags.COMPONENT_STATEFUL) {
|
|
patchStatefulComponent(prevVNode, nextVNode)
|
|
} else {
|
|
patchFunctionalComponent(
|
|
prevVNode,
|
|
nextVNode,
|
|
container,
|
|
parentComponent,
|
|
isSVG
|
|
)
|
|
}
|
|
}
|
|
|
|
function patchStatefulComponent(prevVNode: VNode, nextVNode: VNode) {
|
|
const { childFlags: prevChildFlags } = prevVNode
|
|
const {
|
|
data: nextProps,
|
|
slots: nextSlots,
|
|
childFlags: nextChildFlags
|
|
} = nextVNode
|
|
|
|
const instance = (nextVNode.children =
|
|
prevVNode.children) as MountedComponent
|
|
instance.$slots = nextSlots || EMPTY_OBJ
|
|
instance.$parentVNode = nextVNode
|
|
|
|
// Update props. This will trigger child update if necessary.
|
|
if (nextProps !== null) {
|
|
updateProps(instance, nextProps)
|
|
}
|
|
|
|
// If has different slots content, or has non-compiled slots,
|
|
// the child needs to be force updated. It's ok to call $forceUpdate
|
|
// again even if props update has already queued an update, as the
|
|
// scheduler will not queue the same update twice.
|
|
const shouldForceUpdate =
|
|
prevChildFlags !== nextChildFlags ||
|
|
(nextChildFlags & ChildrenFlags.DYNAMIC_SLOTS) > 0
|
|
if (shouldForceUpdate) {
|
|
instance.$forceUpdate()
|
|
} else if (instance.$vnode.flags & VNodeFlags.COMPONENT) {
|
|
instance.$vnode.parentVNode = nextVNode
|
|
}
|
|
nextVNode.el = instance.$vnode.el
|
|
}
|
|
|
|
function patchFunctionalComponent(
|
|
prevVNode: VNode,
|
|
nextVNode: VNode,
|
|
container: RenderNode,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean
|
|
) {
|
|
// functional component tree is stored on the vnode as `children`
|
|
const { data: prevProps, slots: prevSlots } = prevVNode
|
|
const { data: nextProps, slots: nextSlots } = nextVNode
|
|
const render = nextVNode.tag as FunctionalComponent
|
|
const prevTree = prevVNode.children as VNode
|
|
|
|
let shouldUpdate = true
|
|
if (render.pure && prevSlots == null && nextSlots == null) {
|
|
shouldUpdate = shouldUpdateFunctionalComponent(prevProps, nextProps)
|
|
}
|
|
|
|
if (shouldUpdate) {
|
|
const nextTree = (nextVNode.children = normalizeComponentRoot(
|
|
render(nextProps || EMPTY_OBJ, nextSlots || EMPTY_OBJ),
|
|
nextVNode
|
|
))
|
|
patch(prevTree, nextTree, container, parentComponent, isSVG)
|
|
nextVNode.el = nextTree.el
|
|
} else if (prevTree.flags & VNodeFlags.COMPONENT) {
|
|
// functional component returned another component
|
|
prevTree.parentVNode = nextVNode
|
|
}
|
|
}
|
|
|
|
function patchFragment(
|
|
prevVNode: VNode,
|
|
nextVNode: VNode,
|
|
container: RenderNode,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean
|
|
) {
|
|
// determine the tail node of the previous fragment,
|
|
// then retrieve its next sibling to use as the end node for patchChildren.
|
|
let prevElement = prevVNode.el as RenderNode | RenderFragment
|
|
while (prevElement.$f) {
|
|
prevElement = prevElement.children[prevElement.children.length - 1]
|
|
}
|
|
const { children, childFlags } = nextVNode
|
|
patchChildren(
|
|
prevVNode.childFlags,
|
|
childFlags,
|
|
prevVNode.children,
|
|
children,
|
|
container,
|
|
parentComponent,
|
|
isSVG,
|
|
platformNextSibling(prevElement)
|
|
)
|
|
nextVNode.el = prevVNode.el as RenderFragment
|
|
const fragmentChildren: (
|
|
| RenderNode
|
|
| RenderFragment)[] = (nextVNode.el.children = [])
|
|
if (childFlags & ChildrenFlags.SINGLE_VNODE) {
|
|
fragmentChildren.push((children as MountedVNode).el)
|
|
} else if (childFlags & ChildrenFlags.MULTIPLE_VNODES) {
|
|
for (let i = 0; i < (children as MountedVNodes).length; i++) {
|
|
fragmentChildren.push((children as MountedVNodes)[i].el)
|
|
}
|
|
} else {
|
|
fragmentChildren.push(mountText(createTextVNode(''), null, null))
|
|
}
|
|
}
|
|
|
|
function patchText(prevVNode: VNode, nextVNode: VNode) {
|
|
const el = (nextVNode.el = prevVNode.el) as RenderNode
|
|
const nextText = nextVNode.children
|
|
if (nextText !== prevVNode.children) {
|
|
platformSetText(el, nextText as string)
|
|
}
|
|
}
|
|
|
|
function patchPortal(
|
|
prevVNode: VNode,
|
|
nextVNode: VNode,
|
|
parentComponent: MountedComponent | null
|
|
) {
|
|
const prevContainer = prevVNode.tag as RenderNode
|
|
const nextContainer = nextVNode.tag as RenderNode
|
|
const nextChildren = nextVNode.children
|
|
patchChildren(
|
|
prevVNode.childFlags,
|
|
nextVNode.childFlags,
|
|
prevVNode.children,
|
|
nextChildren,
|
|
prevContainer,
|
|
parentComponent,
|
|
false,
|
|
null
|
|
)
|
|
nextVNode.el = prevVNode.el
|
|
if (nextContainer !== prevContainer) {
|
|
switch (nextVNode.childFlags) {
|
|
case ChildrenFlags.SINGLE_VNODE:
|
|
appendChild(nextContainer, (nextChildren as MountedVNode).el)
|
|
break
|
|
case ChildrenFlags.NO_CHILDREN:
|
|
break
|
|
default:
|
|
for (let i = 0; i < (nextChildren as MountedVNodes).length; i++) {
|
|
appendChild(nextContainer, (nextChildren as MountedVNodes)[i].el)
|
|
}
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
function replaceVNode(
|
|
prevVNode: VNode,
|
|
nextVNode: VNode,
|
|
container: RenderNode,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean
|
|
) {
|
|
unmount(prevVNode)
|
|
replaceChild(
|
|
container,
|
|
prevVNode.el as RenderNode | RenderFragment,
|
|
mount(nextVNode, null, parentComponent, isSVG, null)
|
|
)
|
|
}
|
|
|
|
function patchChildren(
|
|
prevChildFlags: ChildrenFlags,
|
|
nextChildFlags: ChildrenFlags,
|
|
prevChildren: VNodeChildren,
|
|
nextChildren: VNodeChildren,
|
|
container: RenderNode,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean,
|
|
endNode: RenderNode | RenderFragment | null
|
|
) {
|
|
switch (prevChildFlags) {
|
|
case ChildrenFlags.SINGLE_VNODE:
|
|
switch (nextChildFlags) {
|
|
case ChildrenFlags.SINGLE_VNODE:
|
|
patch(
|
|
prevChildren as VNode,
|
|
nextChildren as VNode,
|
|
container,
|
|
parentComponent,
|
|
isSVG
|
|
)
|
|
break
|
|
case ChildrenFlags.NO_CHILDREN:
|
|
remove(prevChildren as VNode, container)
|
|
break
|
|
default:
|
|
remove(prevChildren as VNode, container)
|
|
mountArrayChildren(
|
|
nextChildren as VNode[],
|
|
container,
|
|
parentComponent,
|
|
isSVG,
|
|
endNode
|
|
)
|
|
break
|
|
}
|
|
break
|
|
case ChildrenFlags.NO_CHILDREN:
|
|
switch (nextChildFlags) {
|
|
case ChildrenFlags.SINGLE_VNODE:
|
|
mount(
|
|
nextChildren as VNode,
|
|
container,
|
|
parentComponent,
|
|
isSVG,
|
|
endNode
|
|
)
|
|
break
|
|
case ChildrenFlags.NO_CHILDREN:
|
|
break
|
|
default:
|
|
mountArrayChildren(
|
|
nextChildren as VNode[],
|
|
container,
|
|
parentComponent,
|
|
isSVG,
|
|
endNode
|
|
)
|
|
break
|
|
}
|
|
break
|
|
default:
|
|
// MULTIPLE_CHILDREN
|
|
if (nextChildFlags === ChildrenFlags.SINGLE_VNODE) {
|
|
removeAll(prevChildren as MountedVNodes, container, endNode)
|
|
mount(
|
|
nextChildren as VNode,
|
|
container,
|
|
parentComponent,
|
|
isSVG,
|
|
endNode
|
|
)
|
|
} else if (nextChildFlags === ChildrenFlags.NO_CHILDREN) {
|
|
removeAll(prevChildren as MountedVNodes, container, endNode)
|
|
} else {
|
|
const prevLength = (prevChildren as VNode[]).length
|
|
const nextLength = (nextChildren as VNode[]).length
|
|
if (prevLength === 0) {
|
|
if (nextLength > 0) {
|
|
mountArrayChildren(
|
|
nextChildren as VNode[],
|
|
container,
|
|
parentComponent,
|
|
isSVG,
|
|
endNode
|
|
)
|
|
}
|
|
} else if (nextLength === 0) {
|
|
removeAll(prevChildren as MountedVNodes, container, endNode)
|
|
} else if (
|
|
prevChildFlags === ChildrenFlags.KEYED_VNODES &&
|
|
nextChildFlags === ChildrenFlags.KEYED_VNODES
|
|
) {
|
|
patchKeyedChildren(
|
|
prevChildren as VNode[],
|
|
nextChildren as VNode[],
|
|
container,
|
|
prevLength,
|
|
nextLength,
|
|
parentComponent,
|
|
isSVG,
|
|
endNode
|
|
)
|
|
} else {
|
|
patchNonKeyedChildren(
|
|
prevChildren as VNode[],
|
|
nextChildren as VNode[],
|
|
container,
|
|
prevLength,
|
|
nextLength,
|
|
parentComponent,
|
|
isSVG,
|
|
endNode
|
|
)
|
|
}
|
|
}
|
|
break
|
|
}
|
|
}
|
|
|
|
function patchNonKeyedChildren(
|
|
prevChildren: VNode[],
|
|
nextChildren: VNode[],
|
|
container: RenderNode,
|
|
prevLength: number,
|
|
nextLength: number,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean,
|
|
endNode: RenderNode | RenderFragment | null
|
|
) {
|
|
const commonLength = prevLength > nextLength ? nextLength : prevLength
|
|
let i = 0
|
|
let nextChild
|
|
let prevChild
|
|
for (i; i < commonLength; i++) {
|
|
nextChild = nextChildren[i]
|
|
prevChild = prevChildren[i]
|
|
if (nextChild.el) {
|
|
nextChildren[i] = nextChild = cloneVNode(nextChild)
|
|
}
|
|
patch(prevChild, nextChild, container, parentComponent, isSVG)
|
|
prevChildren[i] = nextChild
|
|
}
|
|
if (prevLength < nextLength) {
|
|
for (i = commonLength; i < nextLength; i++) {
|
|
nextChild = nextChildren[i]
|
|
if (nextChild.el) {
|
|
nextChildren[i] = nextChild = cloneVNode(nextChild)
|
|
}
|
|
mount(nextChild, container, parentComponent, isSVG, endNode)
|
|
}
|
|
} else if (prevLength > nextLength) {
|
|
for (i = commonLength; i < prevLength; i++) {
|
|
remove(prevChildren[i], container)
|
|
}
|
|
}
|
|
}
|
|
|
|
function patchKeyedChildren(
|
|
prevChildren: VNode[],
|
|
nextChildren: VNode[],
|
|
container: RenderNode,
|
|
prevLength: number,
|
|
nextLength: number,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean,
|
|
endNode: RenderNode | RenderFragment | null
|
|
) {
|
|
let prevEnd = prevLength - 1
|
|
let nextEnd = nextLength - 1
|
|
let i
|
|
let j = 0
|
|
let prevVNode = prevChildren[j]
|
|
let nextVNode = nextChildren[j]
|
|
let nextPos
|
|
|
|
outer: {
|
|
// Sync nodes with the same key at the beginning.
|
|
while (prevVNode.key === nextVNode.key) {
|
|
if (nextVNode.el) {
|
|
nextChildren[j] = nextVNode = cloneVNode(nextVNode)
|
|
}
|
|
patch(prevVNode, nextVNode, container, parentComponent, isSVG)
|
|
prevChildren[j] = nextVNode
|
|
j++
|
|
if (j > prevEnd || j > nextEnd) {
|
|
break outer
|
|
}
|
|
prevVNode = prevChildren[j]
|
|
nextVNode = nextChildren[j]
|
|
}
|
|
|
|
prevVNode = prevChildren[prevEnd]
|
|
nextVNode = nextChildren[nextEnd]
|
|
|
|
// Sync nodes with the same key at the end.
|
|
while (prevVNode.key === nextVNode.key) {
|
|
if (nextVNode.el) {
|
|
nextChildren[nextEnd] = nextVNode = cloneVNode(nextVNode)
|
|
}
|
|
patch(prevVNode, nextVNode, container, parentComponent, isSVG)
|
|
prevChildren[prevEnd] = nextVNode
|
|
prevEnd--
|
|
nextEnd--
|
|
if (j > prevEnd || j > nextEnd) {
|
|
break outer
|
|
}
|
|
prevVNode = prevChildren[prevEnd]
|
|
nextVNode = nextChildren[nextEnd]
|
|
}
|
|
}
|
|
|
|
if (j > prevEnd) {
|
|
if (j <= nextEnd) {
|
|
nextPos = nextEnd + 1
|
|
const nextNode =
|
|
nextPos < nextLength ? nextChildren[nextPos].el : endNode
|
|
while (j <= nextEnd) {
|
|
nextVNode = nextChildren[j]
|
|
if (nextVNode.el) {
|
|
nextChildren[j] = nextVNode = cloneVNode(nextVNode)
|
|
}
|
|
j++
|
|
mount(nextVNode, container, parentComponent, isSVG, nextNode)
|
|
}
|
|
}
|
|
} else if (j > nextEnd) {
|
|
while (j <= prevEnd) {
|
|
remove(prevChildren[j++], container)
|
|
}
|
|
} else {
|
|
let prevStart = j
|
|
const nextStart = j
|
|
const prevLeft = prevEnd - j + 1
|
|
const nextLeft = nextEnd - j + 1
|
|
const sources: number[] = []
|
|
for (i = 0; i < nextLeft; i++) {
|
|
sources.push(0)
|
|
}
|
|
// Keep track if its possible to remove whole DOM using textContent = ''
|
|
let canRemoveWholeContent = prevLeft === prevLength
|
|
let moved = false
|
|
let pos = 0
|
|
let patched = 0
|
|
|
|
// When sizes are small, just loop them through
|
|
if (nextLength < 4 || (prevLeft | nextLeft) < 32) {
|
|
for (i = prevStart; i <= prevEnd; i++) {
|
|
prevVNode = prevChildren[i]
|
|
if (patched < nextLeft) {
|
|
for (j = nextStart; j <= nextEnd; j++) {
|
|
nextVNode = nextChildren[j]
|
|
if (prevVNode.key === nextVNode.key) {
|
|
sources[j - nextStart] = i + 1
|
|
if (canRemoveWholeContent) {
|
|
canRemoveWholeContent = false
|
|
while (i > prevStart) {
|
|
remove(prevChildren[prevStart++], container)
|
|
}
|
|
}
|
|
if (pos > j) {
|
|
moved = true
|
|
} else {
|
|
pos = j
|
|
}
|
|
if (nextVNode.el) {
|
|
nextChildren[j] = nextVNode = cloneVNode(nextVNode)
|
|
}
|
|
patch(prevVNode, nextVNode, container, parentComponent, isSVG)
|
|
patched++
|
|
break
|
|
}
|
|
}
|
|
if (!canRemoveWholeContent && j > nextEnd) {
|
|
remove(prevVNode, container)
|
|
}
|
|
} else if (!canRemoveWholeContent) {
|
|
remove(prevVNode, container)
|
|
}
|
|
}
|
|
} else {
|
|
const keyIndex: Record<string, number> = {}
|
|
|
|
// Map keys by their index
|
|
for (i = nextStart; i <= nextEnd; i++) {
|
|
keyIndex[nextChildren[i].key as string] = i
|
|
}
|
|
|
|
// Try to patch same keys
|
|
for (i = prevStart; i <= prevEnd; i++) {
|
|
prevVNode = prevChildren[i]
|
|
|
|
if (patched < nextLeft) {
|
|
j = keyIndex[prevVNode.key as string]
|
|
|
|
if (j !== void 0) {
|
|
if (canRemoveWholeContent) {
|
|
canRemoveWholeContent = false
|
|
while (i > prevStart) {
|
|
remove(prevChildren[prevStart++], container)
|
|
}
|
|
}
|
|
nextVNode = nextChildren[j]
|
|
sources[j - nextStart] = i + 1
|
|
if (pos > j) {
|
|
moved = true
|
|
} else {
|
|
pos = j
|
|
}
|
|
if (nextVNode.el) {
|
|
nextChildren[j] = nextVNode = cloneVNode(nextVNode)
|
|
}
|
|
patch(prevVNode, nextVNode, container, parentComponent, isSVG)
|
|
patched++
|
|
} else if (!canRemoveWholeContent) {
|
|
remove(prevVNode, container)
|
|
}
|
|
} else if (!canRemoveWholeContent) {
|
|
remove(prevVNode, container)
|
|
}
|
|
}
|
|
}
|
|
// fast-path: if nothing patched remove all old and add all new
|
|
if (canRemoveWholeContent) {
|
|
removeAll(prevChildren as MountedVNodes, container, endNode)
|
|
mountArrayChildren(
|
|
nextChildren,
|
|
container,
|
|
parentComponent,
|
|
isSVG,
|
|
endNode
|
|
)
|
|
} else {
|
|
if (moved) {
|
|
const seq = lis(sources)
|
|
j = seq.length - 1
|
|
for (i = nextLeft - 1; i >= 0; i--) {
|
|
if (sources[i] === 0) {
|
|
pos = i + nextStart
|
|
nextVNode = nextChildren[pos]
|
|
if (nextVNode.el) {
|
|
nextChildren[pos] = nextVNode = cloneVNode(nextVNode)
|
|
}
|
|
nextPos = pos + 1
|
|
mount(
|
|
nextVNode,
|
|
container,
|
|
parentComponent,
|
|
isSVG,
|
|
nextPos < nextLength ? nextChildren[nextPos].el : endNode
|
|
)
|
|
} else if (j < 0 || i !== seq[j]) {
|
|
pos = i + nextStart
|
|
nextVNode = nextChildren[pos]
|
|
nextPos = pos + 1
|
|
insertOrAppend(
|
|
container,
|
|
nextVNode.el as RenderNode | RenderFragment,
|
|
nextPos < nextLength ? nextChildren[nextPos].el : endNode
|
|
)
|
|
} else {
|
|
j--
|
|
}
|
|
}
|
|
} else if (patched !== nextLeft) {
|
|
// when patched count doesn't match b length we need to insert those
|
|
// new ones loop backwards so we can use insertBefore
|
|
for (i = nextLeft - 1; i >= 0; i--) {
|
|
if (sources[i] === 0) {
|
|
pos = i + nextStart
|
|
nextVNode = nextChildren[pos]
|
|
if (nextVNode.el) {
|
|
nextChildren[pos] = nextVNode = cloneVNode(nextVNode)
|
|
}
|
|
nextPos = pos + 1
|
|
mount(
|
|
nextVNode,
|
|
container,
|
|
parentComponent,
|
|
isSVG,
|
|
nextPos < nextLength ? nextChildren[nextPos].el : endNode
|
|
)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// unmounting ----------------------------------------------------------------
|
|
|
|
function unmount(vnode: VNode) {
|
|
const { flags, children, childFlags, ref } = vnode
|
|
if (flags & VNodeFlags.ELEMENT || flags & VNodeFlags.FRAGMENT) {
|
|
unmountChildren(children as VNodeChildren, childFlags)
|
|
if (teardownVNode !== void 0) {
|
|
teardownVNode(vnode)
|
|
}
|
|
} else if (flags & VNodeFlags.COMPONENT) {
|
|
if (flags & VNodeFlags.COMPONENT_STATEFUL) {
|
|
unmountComponentInstance(children as MountedComponent)
|
|
} else {
|
|
unmount(children as VNode)
|
|
}
|
|
} else if (flags & VNodeFlags.PORTAL) {
|
|
if (childFlags & ChildrenFlags.MULTIPLE_VNODES) {
|
|
removeAll(children as MountedVNodes, vnode.tag as RenderNode, null)
|
|
} else if (childFlags === ChildrenFlags.SINGLE_VNODE) {
|
|
remove(children as VNode, vnode.tag as RenderNode)
|
|
}
|
|
}
|
|
if (ref) {
|
|
ref(null)
|
|
}
|
|
}
|
|
|
|
function unmountChildren(children: VNodeChildren, childFlags: ChildrenFlags) {
|
|
if (childFlags & ChildrenFlags.MULTIPLE_VNODES) {
|
|
unmountArrayChildren(children as VNode[])
|
|
} else if (childFlags === ChildrenFlags.SINGLE_VNODE) {
|
|
unmount(children as VNode)
|
|
}
|
|
}
|
|
|
|
function unmountArrayChildren(children: VNode[]) {
|
|
for (let i = 0; i < children.length; i++) {
|
|
unmount(children[i])
|
|
}
|
|
}
|
|
|
|
function remove(vnode: VNode, container: RenderNode) {
|
|
unmount(vnode)
|
|
if (container && vnode.el) {
|
|
removeChild(container, vnode.el)
|
|
vnode.el = null
|
|
}
|
|
}
|
|
|
|
function removeAll(
|
|
children: MountedVNodes,
|
|
container: RenderNode,
|
|
ref: RenderNode | RenderFragment | null
|
|
) {
|
|
unmountArrayChildren(children)
|
|
if (ref === null) {
|
|
platformClearContent(container)
|
|
} else {
|
|
for (let i = 0; i < children.length; i++) {
|
|
removeChild(container, children[i].el as RenderNode | RenderFragment)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Component lifecycle -------------------------------------------------------
|
|
|
|
function mountComponentInstance(
|
|
parentVNode: VNode,
|
|
Component: ComponentClass,
|
|
container: RenderNode | null,
|
|
parentComponent: MountedComponent | null,
|
|
isSVG: boolean,
|
|
endNode: RenderNode | RenderFragment | null
|
|
): RenderNode {
|
|
// a vnode may already have an instance if this is a compat call
|
|
// with new Vue()
|
|
const instance =
|
|
(__COMPAT__ && (parentVNode.children as MountedComponent)) ||
|
|
createComponentInstance(parentVNode, Component, parentComponent)
|
|
|
|
const queueUpdate = (instance.$forceUpdate = () => {
|
|
queueJob(instance._updateHandle, flushHooks)
|
|
})
|
|
|
|
instance._updateHandle = autorun(
|
|
() => {
|
|
if (instance._destroyed) {
|
|
return
|
|
}
|
|
if (instance._mounted) {
|
|
updateComponentInstance(instance, container, isSVG)
|
|
} else {
|
|
// this will be executed synchronously right here
|
|
instance.$vnode = renderInstanceRoot(instance)
|
|
parentVNode.el = mount(
|
|
instance.$vnode,
|
|
container,
|
|
instance,
|
|
isSVG,
|
|
endNode
|
|
)
|
|
instance._mounted = true
|
|
mountComponentInstanceCallbacks(instance, parentVNode.ref)
|
|
}
|
|
},
|
|
{
|
|
scheduler: queueUpdate
|
|
// TODO add API for using onTrigger for component re-render debugging
|
|
}
|
|
)
|
|
|
|
return parentVNode.el as RenderNode
|
|
}
|
|
|
|
function mountComponentInstanceCallbacks(
|
|
instance: MountedComponent,
|
|
ref: Ref | null
|
|
) {
|
|
if (instance.beforeMount) {
|
|
instance.beforeMount.call(instance.$proxy)
|
|
}
|
|
if (ref) {
|
|
mountRef(ref, instance)
|
|
}
|
|
if (instance.mounted) {
|
|
queueHook(() => {
|
|
;(instance as any).mounted.call(instance.$proxy)
|
|
})
|
|
}
|
|
}
|
|
|
|
function updateComponentInstance(
|
|
instance: MountedComponent,
|
|
container: RenderNode | null,
|
|
isSVG: boolean
|
|
) {
|
|
const prevVNode = instance.$vnode
|
|
|
|
if (instance.beforeUpdate) {
|
|
instance.beforeUpdate.call(instance.$proxy, prevVNode)
|
|
}
|
|
|
|
const nextVNode = (instance.$vnode = renderInstanceRoot(instance))
|
|
container =
|
|
container || parentNode(prevVNode.el as RenderNode | RenderFragment)
|
|
patch(prevVNode, nextVNode, container, instance, isSVG)
|
|
const el = nextVNode.el as RenderNode
|
|
|
|
// recursively update parentVNode el for nested HOCs
|
|
if ((nextVNode.flags & VNodeFlags.PORTAL) === 0) {
|
|
let vnode = instance.$parentVNode
|
|
while (vnode !== null) {
|
|
if ((vnode.flags & VNodeFlags.COMPONENT) > 0) {
|
|
vnode.el = el
|
|
}
|
|
vnode = vnode.parentVNode
|
|
}
|
|
}
|
|
|
|
if (instance.updated) {
|
|
queueHook(() => {
|
|
;(instance as any).updated.call(instance.$proxy, nextVNode)
|
|
})
|
|
}
|
|
}
|
|
|
|
function unmountComponentInstance(instance: MountedComponent) {
|
|
if (instance.beforeDestroy) {
|
|
instance.beforeDestroy.call(instance.$proxy)
|
|
}
|
|
if (instance.$vnode) {
|
|
unmount(instance.$vnode)
|
|
}
|
|
stop(instance._updateHandle)
|
|
teardownComponentInstance(instance)
|
|
instance._destroyed = true
|
|
if (instance.destroyed) {
|
|
instance.destroyed.call(instance.$proxy)
|
|
}
|
|
}
|
|
|
|
// TODO hydrating ------------------------------------------------------------
|
|
|
|
// API -----------------------------------------------------------------------
|
|
|
|
function render(vnode: VNode | null, container: any) {
|
|
const prevVNode = container.vnode
|
|
if (vnode && vnode.el) {
|
|
vnode = cloneVNode(vnode)
|
|
}
|
|
if (prevVNode == null) {
|
|
if (vnode) {
|
|
mount(vnode, container, null, false, null)
|
|
container.vnode = vnode
|
|
}
|
|
} else {
|
|
if (vnode) {
|
|
patch(prevVNode, vnode, container, null, false)
|
|
container.vnode = vnode
|
|
} else {
|
|
remove(prevVNode, container)
|
|
container.vnode = null
|
|
}
|
|
}
|
|
flushHooks()
|
|
return vnode && vnode.flags & VNodeFlags.COMPONENT_STATEFUL
|
|
? (vnode.children as MountedComponent).$proxy
|
|
: null
|
|
}
|
|
|
|
return { render }
|
|
}
|