Match-id-39f5a8d18647e1a0b0f57d15769321a768cdcf94

libs/horizon/src/renderer/diff/nodeDiffComparator.ts

@@ -1,5 +1,5 @@
 import type { VNode } from '../Types';
-import { FlagUtils } from '../vnode/VNodeFlags';
+import { FlagUtils, DirectAddition } from '../vnode/VNodeFlags';
 import { TYPE_COMMON_ELEMENT, TYPE_FRAGMENT, TYPE_PORTAL } from '../../external/JSXElementType';
 import { DomText, DomPortal, Fragment, DomComponent } from '../vnode/VNodeTags';
 import {updateVNode, createVNodeFromElement, updateVNodePath, createFragmentVNode, createPortalVNode, createDomTextVNode} from '../vnode/VNodeCreator';
@@ -347,11 +347,23 @@ function diffArrayNodesHandler(
 
   // 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;
+    }
     for (; leftIdx < rightIdx; leftIdx++) {
       newNode = getNewNode(parentNode, newChildren[leftIdx], null);
 
       if (newNode !== null) {
-        theLastPosition = setVNodeAdditionFlag(newNode, theLastPosition, isComparing);
+        if (isComparing) {
+          FlagUtils.setAddition(newNode);
+        }
+        if (isDirectAdd) {
+          FlagUtils.markDirectAddition(newNode);
+        }
         newNode.eIndex = leftIdx;
         appendNode(newNode);
       }

libs/horizon/src/renderer/submit/LifeCycleHandler.ts

@@ -17,7 +17,7 @@ import {
   SuspenseComponent,
   MemoComponent,
 } from '../vnode/VNodeTags';
-import { FlagUtils, ResetText, Clear, Update } from '../vnode/VNodeFlags';
+import { FlagUtils, ResetText, Clear, Update, DirectAddition } from '../vnode/VNodeFlags';
 import { mergeDefaultProps } from '../render/LazyComponent';
 import {
   submitDomUpdate,
@@ -241,6 +241,11 @@ function submitAddition(vNode: VNode): void {
     FlagUtils.removeFlag(parent, ResetText);
   }
 
+  if ((vNode.flags & DirectAddition) === DirectAddition) {
+    insertOrAppendPlacementNode(vNode, null, parentDom);
+    FlagUtils.removeFlag(vNode, DirectAddition);
+    return;
+  }
   const before = getSiblingDom(vNode);
   insertOrAppendPlacementNode(vNode, before, parentDom);
 }

libs/horizon/src/renderer/vnode/VNodeFlags.ts

@@ -5,20 +5,21 @@
 import type { VNode } from '../Types';
 
 
-export const InitFlag =   /**     */    0b000000000000;
+export const InitFlag =   /**     */    0;
 // vNode节点的flags
-export const Addition =  /**     */     0b100000000000;
-export const Update =     /**     */    0b010000000000;
-export const Deletion = /**     */      0b001000000000;
-export const ResetText =/**     */      0b000100000000;
-export const Callback =   /**     */    0b000010000000;
-export const DidCapture =/**     */     0b000001000000;
-export const Ref =       /**     */     0b000000100000;
-export const Snapshot =  /**     */     0b000000010000;
-export const Interrupted =  /**     */  0b000000001000; // 被中断了，抛出错误的vNode以及它的父vNode
-export const ShouldCapture =/**     */  0b000000000100;
-export const ForceUpdate = /**     */   0b000000000010; // For suspense
-export const Clear =     /**     */     0b000000000001;
+export const DirectAddition = /**  */  1 << 0; // 在本次更新前入股父dom没有子节点，说明本次可以直接添加至父节点，不需要通过 getSiblingDom 找到 before 节点
+export const Addition =  /**     */    1 << 1;
+export const Update =     /**     */   1 << 2;
+export const Deletion = /**     */     1 << 3;
+export const ResetText =/**     */     1 << 4;
+export const Callback =   /**     */   1 << 5;
+export const DidCapture =/**     */    1 << 6;
+export const Ref =       /**     */    1 << 7;
+export const Snapshot =  /**     */    1 << 8;
+export const Interrupted =  /**     */ 1 << 9; // 被中断了，抛出错误的vNode以及它的父vNode
+export const ShouldCapture =/**     */ 1 << 11;
+export const ForceUpdate = /**     */  1 << 12; // For suspense
+export const Clear =     /**     */    1 << 13;
 const LifecycleEffectArr = Update | Callback | Ref | Snapshot;
 
 export class FlagUtils {
@@ -44,6 +45,10 @@ export class FlagUtils {
   static setAddition(node: VNode) {
     node.flags = Addition;
   }
+
+  static markDirectAddition(node: VNode) {
+    node.flags |= DirectAddition;
+  }
   static markUpdate(node: VNode) {
     node.flags |= Update;
   }

libs/horizon/src/renderer/vnode/VNodeUtils.ts

@@ -169,7 +169,7 @@ export function getSiblingDom(vNode: VNode): Element | null {
     // 如果不是dom节点，往下找
     while (!isDomVNode(node)) {
       // 如果节点也是Addition
-      if ((node.flags & Addition) ===Addition) {
+      if ((node.flags & Addition) === Addition) {
         continue findSibling;
       }
 
@@ -183,7 +183,7 @@ export function getSiblingDom(vNode: VNode): Element | null {
       }
     }
 
-    if ((node.flags & Addition) ===InitFlag) {
+    if ((node.flags & Addition) === InitFlag) {
       // 找到
       return node.realNode;
     }