🚧 Optimize

This commit is contained in:
2025-10-01 22:32:57 +08:00
parent 1216b0b67c
commit 2d02bf7f1f
11 changed files with 900 additions and 263 deletions

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/**
* 编辑器相关常量配置
*/
// 编辑器实例管理
export const EDITOR_CONFIG = {
/** 最多缓存的编辑器实例数量 */
MAX_INSTANCES: 5,
/** 语法树缓存过期时间(毫秒) */
SYNTAX_TREE_CACHE_TIMEOUT: 30000,
/** 加载状态延迟时间(毫秒) */
LOADING_DELAY: 800,
} as const;

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/**
* 操作信息接口
*/
interface OperationInfo {
controller: AbortController;
createdAt: number;
timeout?: number;
timeoutId?: NodeJS.Timeout;
}
/**
* 异步操作管理器
* 用于管理异步操作的竞态条件,确保只有最新的操作有效
* 支持操作超时和自动清理机制
*
* @template T 操作上下文的类型
*/
export class AsyncManager<T = any> {
private operationSequence = 0;
private pendingOperations = new Map<number, OperationInfo>();
private currentContext: T | null = null;
private defaultTimeout: number;
/**
* 创建异步操作管理器
*
* @param defaultTimeout 默认超时时间毫秒0表示不设置超时
*/
constructor(defaultTimeout: number = 0) {
this.defaultTimeout = defaultTimeout;
}
/**
* 生成新的操作ID
*
* @returns 新的操作ID
*/
getNextOperationId(): number {
return ++this.operationSequence;
}
/**
* 开始新的操作
*
* @param context 操作上下文
* @param options 操作选项
* @returns 操作ID和AbortController
*/
startOperation(
context: T,
options?: {
excludeId?: number;
timeout?: number;
}
): { operationId: number; abortController: AbortController } {
const operationId = this.getNextOperationId();
const abortController = new AbortController();
const timeout = options?.timeout ?? this.defaultTimeout;
// 取消之前的操作
this.cancelPreviousOperations(options?.excludeId);
// 创建操作信息
const operationInfo: OperationInfo = {
controller: abortController,
createdAt: Date.now(),
timeout: timeout > 0 ? timeout : undefined
};
// 设置超时处理
if (timeout > 0) {
operationInfo.timeoutId = setTimeout(() => {
this.cancelOperation(operationId, 'timeout');
}, timeout);
}
// 设置当前上下文和操作
this.currentContext = context;
this.pendingOperations.set(operationId, operationInfo);
return { operationId, abortController };
}
/**
* 检查操作是否仍然有效
*
* @param operationId 操作ID
* @param context 操作上下文
* @returns 操作是否有效
*/
isOperationValid(operationId: number, context?: T): boolean {
const operationInfo = this.pendingOperations.get(operationId);
const contextValid = context === undefined || this.currentContext === context;
return (
operationInfo !== undefined &&
!operationInfo.controller.signal.aborted &&
contextValid
);
}
/**
* 完成操作
*
* @param operationId 操作ID
*/
completeOperation(operationId: number): void {
const operationInfo = this.pendingOperations.get(operationId);
if (operationInfo) {
// 清理超时定时器
if (operationInfo.timeoutId) {
clearTimeout(operationInfo.timeoutId);
}
this.pendingOperations.delete(operationId);
}
}
/**
* 取消指定操作
*
* @param operationId 操作ID
* @param reason 取消原因
*/
cancelOperation(operationId: number, reason?: string): void {
const operationInfo = this.pendingOperations.get(operationId);
if (operationInfo) {
// 清理超时定时器
if (operationInfo.timeoutId) {
clearTimeout(operationInfo.timeoutId);
}
// 取消操作
operationInfo.controller.abort(reason);
this.pendingOperations.delete(operationId);
}
}
/**
* 取消之前的操作修复并发bug
*
* @param excludeId 要排除的操作ID不取消该操作
*/
cancelPreviousOperations(excludeId?: number): void {
// 创建要取消的操作ID数组避免在遍历时修改Map
const operationIdsToCancel: number[] = [];
for (const [operationId] of this.pendingOperations) {
if (excludeId === undefined || operationId !== excludeId) {
operationIdsToCancel.push(operationId);
}
}
// 批量取消操作
for (const operationId of operationIdsToCancel) {
this.cancelOperation(operationId, 'superseded');
}
}
/**
* 取消所有操作
*/
cancelAllOperations(): void {
// 创建要取消的操作ID数组避免在遍历时修改Map
const operationIdsToCancel = Array.from(this.pendingOperations.keys());
// 批量取消操作
for (const operationId of operationIdsToCancel) {
this.cancelOperation(operationId, 'cancelled');
}
this.currentContext = null;
}
/**
* 清理过期操作(手动清理超时操作)
*
* @param maxAge 最大存活时间(毫秒)
* @returns 清理的操作数量
*/
cleanupExpiredOperations(maxAge: number): number {
const now = Date.now();
const expiredOperationIds: number[] = [];
for (const [operationId, operationInfo] of this.pendingOperations) {
if (now - operationInfo.createdAt > maxAge) {
expiredOperationIds.push(operationId);
}
}
// 批量取消过期操作
for (const operationId of expiredOperationIds) {
this.cancelOperation(operationId, 'expired');
}
return expiredOperationIds.length;
}
/**
* 获取操作统计信息
*
* @returns 操作统计信息
*/
getOperationStats(): {
total: number;
withTimeout: number;
averageAge: number;
oldestAge: number;
} {
const now = Date.now();
let withTimeout = 0;
let totalAge = 0;
let oldestAge = 0;
for (const operationInfo of this.pendingOperations.values()) {
const age = now - operationInfo.createdAt;
totalAge += age;
oldestAge = Math.max(oldestAge, age);
if (operationInfo.timeout) {
withTimeout++;
}
}
return {
total: this.pendingOperations.size,
withTimeout,
averageAge: this.pendingOperations.size > 0 ? totalAge / this.pendingOperations.size : 0,
oldestAge
};
}
/**
* 获取当前上下文
*
* @returns 当前上下文
*/
getCurrentContext(): T | null {
return this.currentContext;
}
/**
* 设置当前上下文
*
* @param context 新的上下文
*/
setCurrentContext(context: T | null): void {
this.currentContext = context;
}
/**
* 获取待处理操作数量
*
* @returns 待处理操作数量
*/
get pendingCount(): number {
return this.pendingOperations.size;
}
/**
* 检查是否有待处理的操作
*
* @returns 是否有待处理的操作
*/
hasPendingOperations(): boolean {
return this.pendingOperations.size > 0;
}
}

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/**
* 双向链表节点
*
* @template T 节点数据的类型
*/
export class DoublyLinkedListNode<T> {
public data: T;
public prev: DoublyLinkedListNode<T> | null = null;
public next: DoublyLinkedListNode<T> | null = null;
constructor(data: T) {
this.data = data;
}
}
/**
* 双向链表实现
* 提供 O(1) 时间复杂度的插入、删除和移动操作
*
* @template T 链表数据的类型
*/
export class DoublyLinkedList<T> {
private head: DoublyLinkedListNode<T> | null = null;
private tail: DoublyLinkedListNode<T> | null = null;
private _size = 0;
/**
* 获取链表大小
*
* @returns 链表中节点的数量
*/
get size(): number {
return this._size;
}
/**
* 检查链表是否为空
*
* @returns 链表是否为空
*/
get isEmpty(): boolean {
return this._size === 0;
}
/**
* 获取头节点
*
* @returns 头节点如果链表为空则返回null
*/
get first(): DoublyLinkedListNode<T> | null {
return this.head;
}
/**
* 获取尾节点
*
* @returns 尾节点如果链表为空则返回null
*/
get last(): DoublyLinkedListNode<T> | null {
return this.tail;
}
/**
* 在链表头部添加节点
*
* @param data 要添加的数据
* @returns 新创建的节点
*/
addFirst(data: T): DoublyLinkedListNode<T> {
const newNode = new DoublyLinkedListNode(data);
if (this.head === null) {
this.head = this.tail = newNode;
} else {
newNode.next = this.head;
this.head.prev = newNode;
this.head = newNode;
}
this._size++;
return newNode;
}
/**
* 在链表尾部添加节点
*
* @param data 要添加的数据
* @returns 新创建的节点
*/
addLast(data: T): DoublyLinkedListNode<T> {
const newNode = new DoublyLinkedListNode(data);
if (this.tail === null) {
this.head = this.tail = newNode;
} else {
newNode.prev = this.tail;
this.tail.next = newNode;
this.tail = newNode;
}
this._size++;
return newNode;
}
/**
* 删除指定节点
*
* @param node 要删除的节点
* @returns 被删除节点的数据
*/
remove(node: DoublyLinkedListNode<T>): T {
if (node.prev) {
node.prev.next = node.next;
} else {
this.head = node.next;
}
if (node.next) {
node.next.prev = node.prev;
} else {
this.tail = node.prev;
}
// 清理节点引用,防止内存泄漏
const data = node.data;
node.prev = null;
node.next = null;
this._size--;
return data;
}
/**
* 删除头节点
*
* @returns 被删除节点的数据如果链表为空则返回undefined
*/
removeFirst(): T | undefined {
if (this.head === null) {
return undefined;
}
return this.remove(this.head);
}
/**
* 删除尾节点
*
* @returns 被删除节点的数据如果链表为空则返回undefined
*/
removeLast(): T | undefined {
if (this.tail === null) {
return undefined;
}
return this.remove(this.tail);
}
/**
* 将节点移动到链表头部
*
* @param node 要移动的节点
*/
moveToFirst(node: DoublyLinkedListNode<T>): void {
if (node === this.head) {
return; // 已经在头部
}
// 从当前位置移除
if (node.prev) {
node.prev.next = node.next;
}
if (node.next) {
node.next.prev = node.prev;
} else {
this.tail = node.prev;
}
// 移动到头部
node.prev = null;
node.next = this.head;
if (this.head) {
this.head.prev = node;
}
this.head = node;
// 如果链表之前为空,更新尾节点
if (this.tail === null) {
this.tail = node;
}
}
/**
* 将节点移动到链表尾部
*
* @param node 要移动的节点
*/
moveToLast(node: DoublyLinkedListNode<T>): void {
if (node === this.tail) {
return; // 已经在尾部
}
// 从当前位置移除
if (node.prev) {
node.prev.next = node.next;
} else {
this.head = node.next;
}
if (node.next) {
node.next.prev = node.prev;
}
// 移动到尾部
node.next = null;
node.prev = this.tail;
if (this.tail) {
this.tail.next = node;
}
this.tail = node;
// 如果链表之前为空,更新头节点
if (this.head === null) {
this.head = node;
}
}
/**
* 清空链表
*
* @param onClear 清空时对每个节点数据的回调函数
*/
clear(onClear?: (data: T) => void): void {
let current = this.head;
while (current) {
const next = current.next;
if (onClear) {
onClear(current.data);
}
// 清理节点引用,防止内存泄漏
current.prev = null;
current.next = null;
current = next;
}
this.head = null;
this.tail = null;
this._size = 0;
}
/**
* 将链表转换为数组
*
* @returns 包含所有节点数据的数组,按从头到尾的顺序
*/
toArray(): T[] {
const result: T[] = [];
let current = this.head;
while (current) {
result.push(current.data);
current = current.next;
}
return result;
}
/**
* 遍历链表
*
* @param callback 对每个节点数据执行的回调函数
*/
forEach(callback: (data: T, index: number) => void): void {
let current = this.head;
let index = 0;
while (current) {
callback(current.data, index);
current = current.next;
index++;
}
}
}

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/**
* 高效哈希算法实现
* 针对大量文本内容优化的哈希函数集合
*/
/**
* 使用优化的 xxHash32 算法生成字符串哈希值
* 专为大量文本内容设计,性能优异
*
* xxHash32 特点:
* - 极快的处理速度
* - 优秀的分布质量,冲突率极低
* - 对长文本友好,性能不会随长度线性下降
* - 被广泛应用于数据库、压缩工具等
*
* @param content 要哈希的字符串内容
* @returns 32位哈希值的字符串表示
*/
export const generateContentHash = (content: string): string => {
return (generateContentHashInternal(content) >>> 0).toString(36);
};
/**
* 从字符串中提取 32 位整数(模拟小端序)
*/
function getUint32(str: string, index: number): number {
return (
(str.charCodeAt(index) & 0xff) |
((str.charCodeAt(index + 1) & 0xff) << 8) |
((str.charCodeAt(index + 2) & 0xff) << 16) |
((str.charCodeAt(index + 3) & 0xff) << 24)
);
}
/**
* 32 位左旋转
*/
function rotateLeft(value: number, shift: number): number {
return (value << shift) | (value >>> (32 - shift));
}
/**
* 内部哈希计算函数,返回数值
*/
function generateContentHashInternal(content: string): number {
const PRIME1 = 0x9e3779b1;
const PRIME2 = 0x85ebca77;
const PRIME3 = 0xc2b2ae3d;
const PRIME4 = 0x27d4eb2f;
const PRIME5 = 0x165667b1;
const len = content.length;
let hash: number;
let i = 0;
if (len >= 16) {
let acc1 = PRIME1 + PRIME2;
let acc2 = PRIME2;
let acc3 = 0;
let acc4 = -PRIME1;
for (; i <= len - 16; i += 16) {
acc1 = Math.imul(rotateLeft(acc1 + Math.imul(getUint32(content, i), PRIME2), 13), PRIME1);
acc2 = Math.imul(rotateLeft(acc2 + Math.imul(getUint32(content, i + 4), PRIME2), 13), PRIME1);
acc3 = Math.imul(rotateLeft(acc3 + Math.imul(getUint32(content, i + 8), PRIME2), 13), PRIME1);
acc4 = Math.imul(rotateLeft(acc4 + Math.imul(getUint32(content, i + 12), PRIME2), 13), PRIME1);
}
hash = rotateLeft(acc1, 1) + rotateLeft(acc2, 7) + rotateLeft(acc3, 12) + rotateLeft(acc4, 18);
} else {
hash = PRIME5;
}
hash += len;
for (; i <= len - 4; i += 4) {
hash = Math.imul(rotateLeft(hash + Math.imul(getUint32(content, i), PRIME3), 17), PRIME4);
}
for (; i < len; i++) {
hash = Math.imul(rotateLeft(hash + Math.imul(content.charCodeAt(i), PRIME5), 11), PRIME1);
}
hash ^= hash >>> 15;
hash = Math.imul(hash, PRIME2);
hash ^= hash >>> 13;
hash = Math.imul(hash, PRIME3);
hash ^= hash >>> 16;
return hash;
}

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import { DoublyLinkedList, DoublyLinkedListNode } from './doublyLinkedList';
/**
* LRU缓存项
*
* @template K 键的类型
* @template V 值的类型
*/
interface LruCacheItem<K, V> {
key: K;
value: V;
}
/**
* LRU (Least Recently Used) 缓存实现
* 使用双向链表 + Map 实现 O(1) 时间复杂度的所有操作
*
* @template K 键的类型
* @template V 值的类型
*/
export class LruCache<K, V> {
private readonly maxSize: number;
private readonly cache = new Map<K, DoublyLinkedListNode<LruCacheItem<K, V>>>();
private readonly lru = new DoublyLinkedList<LruCacheItem<K, V>>();
/**
* 创建LRU缓存实例
*
* @param maxSize 最大缓存大小
*/
constructor(maxSize: number) {
if (maxSize <= 0) {
throw new Error('Max size must be greater than 0');
}
this.maxSize = maxSize;
}
/**
* 获取缓存值
*
* @param key 键
* @returns 缓存的值如果不存在则返回undefined
*/
get(key: K): V | undefined {
const node = this.cache.get(key);
if (node) {
// 将访问的节点移动到链表尾部(最近使用)
this.lru.moveToLast(node);
return node.data.value;
}
return undefined;
}
/**
* 设置缓存值
*
* @param key 键
* @param value 值
* @param onEvict 当有项目被驱逐时的回调函数
*/
set(key: K, value: V, onEvict?: (evictedKey: K, evictedValue: V) => void): void {
const existingNode = this.cache.get(key);
// 如果键已存在,更新值并移动到最近使用
if (existingNode) {
existingNode.data.value = value;
this.lru.moveToLast(existingNode);
return;
}
// 如果缓存已满,移除最少使用的项
if (this.cache.size >= this.maxSize) {
const oldestNode = this.lru.first;
if (oldestNode) {
const { key: evictedKey, value: evictedValue } = oldestNode.data;
this.cache.delete(evictedKey);
this.lru.removeFirst();
if (onEvict) {
onEvict(evictedKey, evictedValue);
}
}
}
// 添加新项到链表尾部(最近使用)
const newNode = this.lru.addLast({ key, value });
this.cache.set(key, newNode);
}
/**
* 检查键是否存在
*
* @param key 键
* @returns 是否存在
*/
has(key: K): boolean {
return this.cache.has(key);
}
/**
* 删除指定键的缓存
*
* @param key 键
* @returns 是否成功删除
*/
delete(key: K): boolean {
const node = this.cache.get(key);
if (node) {
this.cache.delete(key);
this.lru.remove(node);
return true;
}
return false;
}
/**
* 清空缓存
*
* @param onEvict 清空时对每个项目的回调函数
*/
clear(onEvict?: (key: K, value: V) => void): void {
if (onEvict) {
this.lru.forEach(item => {
onEvict(item.key, item.value);
});
}
this.cache.clear();
this.lru.clear();
}
/**
* 获取缓存大小
*
* @returns 当前缓存项数量
*/
get size(): number {
return this.cache.size;
}
/**
* 获取所有键
*
* @returns 所有键的数组,按最近使用顺序排列(从最少使用到最近使用)
*/
keys(): K[] {
return this.lru.toArray().map(item => item.key);
}
/**
* 获取所有值
*
* @returns 所有值的数组,按最近使用顺序排列(从最少使用到最近使用)
*/
values(): V[] {
return this.lru.toArray().map(item => item.value);
}
}