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Match-id-1dba96d1d4a0290164da813181e61c44591c21d0

This commit is contained in:
* 2022-11-07 10:21:25 +08:00 committed by *
parent a39db5b6f9
commit 88b13ffaa4
2 changed files with 175 additions and 115 deletions
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35
libs/horizon/src/renderer/TreeBuilder.ts
View File

@ -100,7 +100,7 @@ function collectDirtyNodes(vNode: VNode, parent: VNode): void {
// 尝试完成当前工作单元，然后移动到下一个兄弟工作单元。如果没有更多的同级，请返回父vNode。
function bubbleVNode(vNode: VNode): void {
let node : VNode | null = vNode;
let node: VNode | null = vNode;
do {
const parent = node.parent;
@ -351,16 +351,10 @@ function renderFromRoot(treeRoot) {
// 2. 提交变更
submitToRender(treeRoot);
popCurrentRoot();
if (window.__HORIZON_DEV_HOOK__) {
const hook = window.__HORIZON_DEV_HOOK__;
// injector.js 可能在 Horizon 代码之后加载，此时无 __HORIZON_DEV_HOOK__ 全局变量
// Horizon 代码初次加载时不会初始化 helper
if (!hook.isInit) {
injectUpdater();
}
hook.addIfNotInclude(treeRoot);
hook.send(treeRoot);
}
// 与Devtool通信
sendRootToDevTool(treeRoot);
return null;
}
@ -407,6 +401,25 @@ export function launchUpdateFromVNode(vNode: VNode) {
}
}
declare global {
interface Window {
__HORIZON_DEV_HOOK__: any;
}
}
function sendRootToDevTool(treeRoot) {
if (window.__HORIZON_DEV_HOOK__) {
const hook = window.__HORIZON_DEV_HOOK__;
// injector.js 可能在 Horizon 代码之后加载，此时无 __HORIZON_DEV_HOOK__ 全局变量
// Horizon 代码初次加载时不会初始化 helper
if (!hook.isInit) {
injectUpdater();
}
hook.addIfNotInclude(treeRoot);
hook.send(treeRoot);
}
}
// ============================== HorizonDOM使用 ==============================
export function runDiscreteUpdates() {
if (checkMode(ByAsync) || checkMode(InRender)) {

255
libs/horizon/src/renderer/diff/nodeDiffComparator.ts
View File

@ -34,6 +34,13 @@ enum DiffCategory {
ARR_NODE = 'ARR_NODE',
}
type AppendVNode = (vnode: VNode) => void;
interface DiffRightSideResult {
rightIdx: number;
rightEndOldNode: VNode;
rightNewNode: VNode | null;
}
// 检查是不是被 FRAGMENT 包裹
function isNoKeyFragment(child: any) {
return child != null && child.type === TYPE_FRAGMENT && child.key === null;
@ -111,19 +118,12 @@ function getNodeType(newChild: any): string | null {
}
// 设置vNode的flag
function setVNodeAdditionFlag(newNode: VNode, lastPosition: number): number {
let position = lastPosition;
if (newNode.isCreated || newNode.eIndex < lastPosition) {
function setVNodeAdditionFlag(newNode: VNode) {
if (newNode.isCreated) {
// 位置 小于 上一个复用的位置
// 标记为新增
FlagUtils.setAddition(newNode);
} else {
// 复用
position = newNode.eIndex;
}
return position;
}
// 获取新节点
@ -231,33 +231,10 @@ function getOldNodeFromMap(nodeMap: Map<string | number, VNode>, newIdx: number,
return null;
}
// diff数组类型的节点，核心算法
function diffArrayNodesHandler(parentNode: VNode, firstChild: VNode | null, newChildren: Array<any>): VNode | null {
let resultingFirstChild: VNode | null = null;
let prevNewNode: VNode | null = null;
let oldNode = firstChild;
function diffLeftSide(oldNode: VNode | null, newChildren: Array<any>, parentNode: VNode, appendNode: AppendVNode) {
let nextOldNode: VNode | null = null;
let theLastPosition = 0;
// 从左边开始的位置
let leftIdx = 0;
function appendNode(newNode: VNode) {
if (prevNewNode === null) {
resultingFirstChild = newNode;
newNode.cIndex = 0;
} else {
prevNewNode.next = newNode;
newNode.cIndex = prevNewNode.cIndex + 1;
}
markVNodePath(newNode);
prevNewNode = newNode;
}
let canBeReuse;
let newNode;
// 1. 从左侧开始比对currentVNode和newChildren，若不能复用则跳出循环
for (; oldNode !== null && leftIdx < newChildren.length; leftIdx++) {
if (oldNode.eIndex > leftIdx) {
@ -268,14 +245,13 @@ function diffArrayNodesHandler(parentNode: VNode, firstChild: VNode | null, newC
nextOldNode = oldNode.next;
}
canBeReuse = checkCanReuseNode(oldNode, newChildren[leftIdx], leftIdx);
// 不能复用，break
if (!canBeReuse) {
if (!checkCanReuseNode(oldNode, newChildren[leftIdx], leftIdx)) {
oldNode = oldNode ?? nextOldNode;
break;
}
newNode = getNewNode(parentNode, newChildren[leftIdx], oldNode);
const newNode = getNewNode(parentNode, newChildren[leftIdx], oldNode);
// 没有生成新节点，break
if (!newNode) {
oldNode = oldNode ?? nextOldNode;
@ -287,12 +263,23 @@ function diffArrayNodesHandler(parentNode: VNode, firstChild: VNode | null, newC
deleteVNode(parentNode, oldNode);
}
theLastPosition = setVNodeAdditionFlag(newNode, theLastPosition);
setVNodeAdditionFlag(newNode);
newNode.eIndex = leftIdx;
appendNode(newNode);
oldNode = nextOldNode;
}
return { oldNode, leftIdx };
}
function diffRightSide(
oldNode: VNode | null,
leftIdx: number,
newChildren: Array<any>,
parentNode: VNode
): DiffRightSideResult {
let newNode;
let canBeReuse = false;
let rightIdx = newChildren.length;
let rightEndOldNode; // 老节点中最右边匹配的节点引用 abcde --> abfde 则rightEndOldNode = c;
let rightNewNode: VNode | null = null; // 最右边匹配的节点引用 abcde --> abfde 则rightNewNode = d;
@ -333,72 +320,101 @@ function diffArrayNodesHandler(parentNode: VNode, firstChild: VNode | null, newC
deleteVNode(parentNode, rightOldNode);
}
setVNodeAdditionFlag(newNode, theLastPosition);
setVNodeAdditionFlag(newNode);
newNode.eIndex = rightIdx - 1;
rightOldIndex--;
rightEndOldNode = rightOldNode;
}
}
// 3. 新节点已经处理完成
if (leftIdx === rightIdx) {
if (firstChild && parentNode.tag === DomComponent && newChildren.length === 0) {
FlagUtils.markClear(parentNode);
parentNode.clearChild = firstChild;
} else {
deleteVNodes(parentNode, oldNode, rightEndOldNode);
}
return { rightIdx, rightEndOldNode, rightNewNode };
}
if (rightNewNode) {
appendNode(rightNewNode);
setVNodesCIndex(rightNewNode, rightNewNode.cIndex + 1);
}
function appendRightSideNode(
oldNode: VNode | null,
parentNode: VNode,
firstChild: VNode | null,
newChildren: Array<any>,
diffRightSideResult: DiffRightSideResult,
appendNode: AppendVNode
) {
const { rightEndOldNode, rightNewNode } = diffRightSideResult;
return resultingFirstChild;
if (firstChild && parentNode.tag === DomComponent && newChildren.length === 0) {
FlagUtils.markClear(parentNode);
parentNode.clearChild = firstChild;
} else {
deleteVNodes(parentNode, oldNode, rightEndOldNode);
}
// 4. 新节点还有一部分，但是老节点已经没有了
if (oldNode === null) {
let isDirectAdd = false;
// TODO: 是否可以扩大至非dom类型节点
// 如果dom节点在上次添加前没有节点，说明本次添加时，可以直接添加到最后，不需要通过 getSiblingDom 函数找到 before 节点
if (
parentNode.tag === DomComponent &&
parentNode.oldProps?.children?.length === 0 &&
rightIdx - leftIdx === newChildren.length
) {
isDirectAdd = true;
}
const isAddition = parentNode.tag === DomPortal || !parentNode.isCreated;
for (; leftIdx < rightIdx; leftIdx++) {
newNode = getNewNode(parentNode, newChildren[leftIdx], null);
if (rightNewNode) {
appendNode(rightNewNode);
setVNodesCIndex(rightNewNode, rightNewNode.cIndex + 1);
}
}
if (newNode !== null) {
if (isAddition) {
FlagUtils.setAddition(newNode);
}
if (isDirectAdd) {
FlagUtils.markDirectAddition(newNode);
}
newNode.eIndex = leftIdx;
appendNode(newNode);
function appendAllRestNode(
oldNode: VNode | null,
parentNode: VNode,
firstChild: VNode | null,
newChildren: Array<any>,
leftIdx: number,
diffRightSideResult: DiffRightSideResult,
appendNode: AppendVNode
) {
let isDirectAdd = false;
const { rightIdx, rightNewNode } = diffRightSideResult;
// 如果dom节点在上次添加前没有节点，说明本次添加时，可以直接添加到最后，不需要通过 getSiblingDom 函数找到 before 节点
if (
parentNode.tag === DomComponent &&
parentNode.oldProps?.children?.length === 0 &&
rightIdx - leftIdx === newChildren.length
) {
isDirectAdd = true;
}
const isAddition = parentNode.tag === DomPortal || !parentNode.isCreated;
for (; leftIdx < rightIdx; leftIdx++) {
const newNode = getNewNode(parentNode, newChildren[leftIdx], null);
if (newNode !== null) {
if (isAddition) {
FlagUtils.setAddition(newNode);
}
if (isDirectAdd) {
FlagUtils.markDirectAddition(newNode);
}
newNode.eIndex = leftIdx;
appendNode(newNode);
}
if (rightNewNode) {
appendNode(rightNewNode);
setVNodesCIndex(rightNewNode.next, rightNewNode.cIndex + 1);
}
return resultingFirstChild;
}
// 5. 新节点还有一部分，但是老节点也还有一部分
if (rightNewNode) {
appendNode(rightNewNode);
setVNodesCIndex(rightNewNode.next, rightNewNode.cIndex + 1);
}
}
/**
* 双端对比完成，新老节点都有剩余时，构造LIS（最长递增子序列）
* 属于LIS的新节点直接复用，否则新增
*/
function appendNodeWithLIS(
oldNode: VNode,
parentNode: VNode,
firstChild: VNode | null,
newChildren: Array<any>,
leftIdx: number,
diffRightSideResult: DiffRightSideResult,
appendNode: AppendVNode
) {
const { rightIdx, rightNewNode, rightEndOldNode } = diffRightSideResult;
// 把剩下的currentVNode转成Map
const leftChildrenMap = transLeftChildrenToMap(oldNode, rightEndOldNode);
// 通过贪心算法+二分法获取最长递增子序列
const eIndexes: Array<number> = []; // 记录 eIndex 值
const result: Array<number> = []; // 记录最长子序列在eIndexes中的 index 值
const subsequence: Array<number> = []; // 记录最长子序列在eIndexes中的 index 值
const preIndex: Array<number> = []; // 贪心算法在替换的过程中会使得数组不正确，通过记录preIndex找到正确值
const reuseNodes: (VNode | null)[] = []; // 记录复用的 VNode
let i = 0;
@ -406,7 +422,7 @@ function diffArrayNodesHandler(parentNode: VNode, firstChild: VNode | null, newC
let last;
for (; leftIdx < rightIdx; leftIdx++) {
oldNodeFromMap = getOldNodeFromMap(leftChildrenMap, leftIdx, newChildren[leftIdx]);
newNode = getNewNode(parentNode, newChildren[leftIdx], oldNodeFromMap);
const newNode = getNewNode(parentNode, newChildren[leftIdx], oldNodeFromMap);
if (newNode !== null) {
if (newNode.isCreated) {
// 新VNode，直接打上标签新增，不参与到复用，旧的VNode会在后面打上delete标签
@ -417,27 +433,27 @@ function diffArrayNodesHandler(parentNode: VNode, firstChild: VNode | null, newC
if (oldNodeFromMap !== null) {
const eIndex = newNode.eIndex;
eIndexes.push(eIndex);
last = eIndexes[result[result.length - 1]];
last = eIndexes[subsequence[subsequence.length - 1]];
if (eIndex > last || last === undefined) {
// 大的 eIndex直接放在最后
preIndex[i] = result[result.length - 1];
result.push(i);
preIndex[i] = subsequence[subsequence.length - 1];
subsequence.push(i);
} else {
let start = 0;
let end = result.length - 1;
let end = subsequence.length - 1;
let middle;
// 二分法找到需要替换的值
while (start < end) {
middle = Math.floor((start + end) / 2);
if (eIndexes[result[middle]] > eIndex) {
if (eIndexes[subsequence[middle]] > eIndex) {
end = middle;
} else {
start = middle + 1;
}
}
if (eIndex < eIndexes[result[start]]) {
preIndex[i] = result[start - 1];
result[start] = i;
if (eIndex < eIndexes[subsequence[start]]) {
preIndex[i] = subsequence[start - 1];
subsequence[start] = i;
}
}
i++;
@ -450,13 +466,13 @@ function diffArrayNodesHandler(parentNode: VNode, firstChild: VNode | null, newC
}
// 向前回溯找到正确的结果
let length = result.length;
let prev = result[length - 1];
let length = subsequence.length;
let prev = subsequence[length - 1];
while (length-- > 0) {
result[length] = prev;
prev = preIndex[result[length]];
subsequence[length] = prev;
prev = preIndex[subsequence[length]];
}
result.forEach(idx => {
subsequence.forEach(idx => {
// 把需要复用的节点从 restNodes 中清理掉，因为不需要打 add 标记，直接复用 dom 节点
reuseNodes[idx] = null;
});
@ -474,7 +490,43 @@ function diffArrayNodesHandler(parentNode: VNode, firstChild: VNode | null, newC
appendNode(rightNewNode);
setVNodesCIndex(rightNewNode.next, rightNewNode.cIndex + 1);
}
}
// diff数组类型的节点，核心算法
function diffArrayNodesHandler(parentNode: VNode, firstChild: VNode | null, newChildren: Array<any>): VNode | null {
let resultingFirstChild: VNode | null = null;
let prevNewNode: VNode | null = null;
function appendNode(newNode: VNode) {
if (prevNewNode === null) {
resultingFirstChild = newNode;
newNode.cIndex = 0;
} else {
prevNewNode.next = newNode;
newNode.cIndex = prevNewNode.cIndex + 1;
}
markVNodePath(newNode);
prevNewNode = newNode;
}
const { oldNode, leftIdx } = diffLeftSide(firstChild, newChildren, parentNode, appendNode);
const diffRightSideResult = diffRightSide(oldNode, leftIdx, newChildren, parentNode);
// 3. 新节点已经处理完成
if (leftIdx === diffRightSideResult.rightIdx) {
appendRightSideNode(oldNode, parentNode, firstChild, newChildren, diffRightSideResult, appendNode);
return resultingFirstChild;
}
// 4. 新节点还有一部分，但是老节点已经没有了
if (oldNode === null) {
appendAllRestNode(oldNode, parentNode, firstChild, newChildren, leftIdx, diffRightSideResult, appendNode);
return resultingFirstChild;
}
// 5. 新节点还有一部分，但是老节点也还有一部分
appendNodeWithLIS(oldNode, parentNode, firstChild, newChildren, leftIdx, diffRightSideResult, appendNode);
return resultingFirstChild;
}
@ -536,12 +588,7 @@ function diffStringNodeHandler(parentNode: VNode, newChild: any, firstChildVNode
}
// 新节点是对象类型
function diffObjectNodeHandler(
parentNode: VNode,
firstChild: VNode | null,
newChild: any,
isComparing: boolean
) {
function diffObjectNodeHandler(parentNode: VNode, firstChild: VNode | null, newChild: any, isComparing: boolean) {
let canReuseNode: VNode | null = null;
// 通过key比对是否有可以reuse