Match-id-7d89b46de7de3e8d1600a3be62dfef976edfa78a

libs/horizon/src/renderer/components/BaseClassComponent.ts

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+/**
+ * Component的api setState和forceUpdate在实例生成阶段实现
+ */
+class Component {
+  props;
+  context;
+
+  constructor(props, context) {
+    this.props = props;
+    this.context = context;
+  }
+}
+
+// 兼容三方件 react-lifecycles-compat，它会读取 isReactComponent 属性值，不添加会导致 eview-ui 官网白屏
+Component.prototype.isReactComponent = true;
+/**
+ * 支持PureComponent
+ */
+class PureComponent extends Component {
+  constructor(props, context) {
+    super(props, context);
+  }
+}
+
+export { Component, PureComponent };

libs/horizon/src/renderer/components/CreatePortal.ts

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+import {TYPE_PORTAL} from '../utils/elementType';
+import type {PortalType} from '../Types';
+
+export function createPortal(
+  children: any,
+  outerDom: any,
+  key: string = null,
+): PortalType {
+  return {
+    vtype: TYPE_PORTAL,
+    key: key == null ? null : '' + key,
+    children,
+    outerDom,
+  };
+}

libs/horizon/src/renderer/components/CreateRef.ts

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+import type {RefType} from '../Types';
+
+export function createRef(): RefType {
+  return {
+    current: null,
+  };
+}

libs/horizon/src/renderer/components/ForwardRef.ts

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+import {TYPE_FORWARD_REF} from '../utils/elementType';
+
+export function forwardRef(render: Function) {
+  return {
+    vtype: TYPE_FORWARD_REF,
+    render,
+  };
+}

libs/horizon/src/renderer/components/Lazy.ts

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+import type {PromiseType} from '../Types';
+
+import {TYPE_LAZY} from '../utils/elementType';
+
+enum LayStatus {
+  UnProcessed = 'UnProcessed',
+  Pending = 'Pending',
+  Fulfilled = 'Fulfilled',
+  Rejected = 'Rejected',
+}
+
+type LazyContent<T> = {
+  _status: string,
+  _value: () => PromiseType<{default: T}> | PromiseType<T> | T | any
+};
+
+export type LazyComponent<T, P> = {
+  vtype: Symbol | number,
+  _content: P,
+  _load: (content: P) => T,
+};
+
+// lazyContent随着阶段改变，_value改变:
+// 1. 未初始化 -> promiseCtor: () => promise
+// 2. pending -> promise
+// 3. fulfilled -> module
+// 4. rejected -> error
+function lazyLoader<T>(lazyContent: LazyContent<T>): any {
+  if (lazyContent._status === LayStatus.UnProcessed) {
+    // 执行动态导入组件import
+    const promise = lazyContent._value();
+    lazyContent._status = LayStatus.Pending;
+    lazyContent._value = promise;
+    promise.then(
+      module => {
+        if (lazyContent._status === LayStatus.Pending) {
+          const defaultExport = module.default;
+          lazyContent._status = LayStatus.Fulfilled;
+          lazyContent._value = defaultExport;
+        }
+      },
+      error => {
+        if (lazyContent._status === LayStatus.Pending) {
+          lazyContent._status = LayStatus.Rejected;
+          lazyContent._value = error;
+        }
+      },
+    );
+  }
+  if (lazyContent._status === LayStatus.Fulfilled) {
+    return lazyContent._value;
+  } else {
+    throw lazyContent._value;
+  }
+}
+
+export function lazy<T>(promiseCtor: () => PromiseType<{default: T}>): LazyComponent<T, LazyContent<T>> {
+  return {
+    vtype: TYPE_LAZY,
+    _content: {
+      _status: LayStatus.UnProcessed,
+      _value: promiseCtor,
+    },
+    _load: lazyLoader,
+  };
+}

libs/horizon/src/renderer/components/Memo.ts

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+import {TYPE_MEMO} from '../utils/elementType';
+
+export function memo<Props>(type, compare?: (oldProps: Props, newProps: Props) => boolean) {
+  return {
+    vtype: TYPE_MEMO,
+    type: type,
+    compare: compare === undefined ? null : compare,
+  };
+}

libs/horizon/src/renderer/components/context/CompatibleContext.ts

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+import type {VNode} from '../../Types';
+
+import {
+  setOldContextCtx,
+  setContextChangeCtx,
+  getOldContextCtx,
+  resetOldContextCtx,
+  resetContextChangeCtx,
+  setOldPreviousContextCtx,
+  getOldPreviousContextCtx,
+  setVNodeOldContext,
+  getVNodeOldContext,
+  setVNodeOldPreviousContext,
+  getVNodeOldPreviousContext,
+} from '../../ContextSaver';
+
+const emptyObject = {};
+
+// 判断是否是过时的context的提供者
+export function isOldProvider(comp: Function): boolean {
+  // @ts-ignore
+  const childContextTypes = comp.childContextTypes;
+  return childContextTypes !== null && childContextTypes !== undefined;
+}
+
+// 判断是否是过时的context的消费者
+export function isOldConsumer(comp: Function): boolean {
+  // @ts-ignore
+  const contextTypes = comp.contextTypes;
+  return contextTypes !== null && contextTypes !== undefined;
+}
+
+// 如果是旧版context提供者，则缓存两个全局变量，上一个提供者提供的context和当前提供者提供的context
+export function cacheOldCtx(processing: VNode, hasOldContext: any): void {
+  // 每一个context提供者都会更新ctxOldContext
+  if (hasOldContext) {
+    setOldPreviousContextCtx(getOldContextCtx());
+
+    const vNodeContext = getVNodeOldContext(processing) || emptyObject;
+    setOldContextCtx(processing, vNodeContext);
+  }
+}
+
+// 获取当前组件可以消费的context
+export function getOldContext(processing: VNode, clazz: Function, ifProvider: boolean) {
+  const type = processing.type;
+  // 不是context消费者， 则直接返回空对象
+  if (!isOldConsumer(type)) {
+    return emptyObject;
+  }
+
+  // 当组件既是提供者，也是消费者时，取上一个context，不能直接取最新context，因为已经被更新为当前组件的context；
+  // 当组件只是消费者时，则取最新context
+  const parentContext = ((ifProvider && isOldProvider(clazz))) ?
+    getOldPreviousContextCtx() :
+    getOldContextCtx();
+
+  // 除非父级context更改，否则不需要重新创建子context，直接取对应节点上存的。
+  if (getVNodeOldPreviousContext(processing) === parentContext) {
+    return getVNodeOldContext(processing);
+  }
+
+  // 从父的context中取出子定义的context
+  const context = {};
+  for (const key in type.contextTypes) {
+    context[key] = parentContext[key];
+  }
+
+  // 缓存当前组件的context，最近祖先传递下来context，当前可消费的context
+  setVNodeOldPreviousContext(processing, parentContext);
+  setVNodeOldContext(processing, context);
+
+  return context;
+}
+
+// 重置context
+export function resetOldCtx(vNode: VNode): void {
+  resetOldContextCtx(vNode);
+  resetContextChangeCtx(vNode);
+}
+
+// 当前组件是提供者，则需要合并祖先context和当前组件提供的context
+function handleContext(vNode: VNode, parentContext: Object): Object {
+  const instance = vNode.realNode;
+
+  if (typeof instance.getChildContext !== 'function') {
+    return parentContext;
+  }
+
+  // 合并祖先提供的context和当前组件提供的context
+  return {...parentContext, ...instance.getChildContext()};
+}
+
+// 当前组件是context提供者，更新时，需要合并祖先context和当前组件提供的context
+export function updateOldContext(vNode: VNode): void {
+  const ctx = handleContext(vNode, getOldPreviousContextCtx());
+  // 更新context，给子组件用的context
+  setOldContextCtx(vNode, ctx);
+  // 标记更改
+  setContextChangeCtx(vNode, true);
+}

libs/horizon/src/renderer/components/context/Context.ts

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+import type {VNode, ContextType} from '../../Types';
+import {getHookStage} from '../../hooks/HookStage';
+import {throwNotInFuncError} from '../../hooks/BaseHook';
+
+// 重置依赖
+export function resetDepContexts(vNode: VNode): void {
+  vNode.depContexts = [];
+}
+
+// 收集依赖
+function collectDeps<T>(vNode: VNode, context: ContextType<T>) {
+  const depContexts = vNode.depContexts;
+  if (!depContexts.length) {
+    vNode.isDepContextChange = false;
+  }
+  if (!depContexts.includes(context)) {
+    depContexts.push(context);
+  }
+}
+
+export function getNewContext<T>(vNode: VNode, ctx: ContextType<T>, isUseContext: boolean = false): T {
+  // 如果来自于useContext，则需要在函数组件中调用
+  if (isUseContext && getHookStage() === null) {
+    throwNotInFuncError();
+  }
+
+  // 调用到这个方法，说明当前vNode依赖了这个context，所以需要收集起来
+  collectDeps(vNode, ctx);
+
+  return ctx.value;
+}

libs/horizon/src/renderer/components/context/CreateContext.ts

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+import type {ContextType} from '../../Types';
+import {TYPE_PROVIDER, TYPE_CONTEXT} from '../../utils/elementType';
+
+export function createContext<T>(val: T): ContextType<T> {
+  const context: ContextType<T> = {
+    vtype: TYPE_CONTEXT,
+    value: val,
+    Provider: null,
+    Consumer: null,
+  };
+
+  context.Provider = {
+    vtype: TYPE_PROVIDER,
+    _context: context,
+  };
+
+  context.Consumer = context;
+
+  return context;
+}

libs/horizon/src/renderer/taskExecutor/BrowserAsync.ts

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+/**
+ * 浏览器相关实现
+ */
+
+export let now;
+
+if (typeof performance === 'object' && typeof performance.now === 'function') {
+  const localPerformance = performance;
+  now = () => localPerformance.now();
+} else {
+  const localDate = Date;
+  const initialTime = localDate.now();
+  now = () => localDate.now() - initialTime;
+}
+
+let isMessageLoopRunning = false;
+let browserCallback = null;
+
+// 默认每次只运行5ms
+const runTime = 5;
+let deadline = 0;
+
+export function isOverTime() {
+  return now() >= deadline;
+}
+
+// 1、设置deadline；2、回调TaskExecutor传过来的browserCallback
+const callRenderTasks = () => {
+  if (browserCallback == null) {
+    return;
+  }
+
+  const currentTime = now();
+  // 计算deadline
+  deadline = currentTime + runTime;
+  try {
+    // 执行callback
+    const hasMoreTask = browserCallback(
+      currentTime,
+    );
+
+    if (!hasMoreTask) { // 没有更多task
+      isMessageLoopRunning = false;
+      browserCallback = null;
+    } else {
+      // 还有task，继续调用
+      port.postMessage(null);
+    }
+  } catch (error) {
+    port.postMessage(null);
+    throw error;
+  }
+};
+
+const channel = new MessageChannel();
+const port = channel.port2;
+channel.port1.onmessage = callRenderTasks;
+
+export function requestBrowserCallback(callback) {
+  browserCallback = callback;
+
+  if (!isMessageLoopRunning) {
+    isMessageLoopRunning = true;
+    port.postMessage(null);
+  }
+}

libs/horizon/src/renderer/taskExecutor/RenderQueue.ts

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+/**
+ * 利用TaskExecutor的异步任务，封装一个renderQueue来执行同步的渲染callback
+ */
+
+import {runAsync, cancelTask, ImmediatePriority} from './TaskExecutor';
+
+type RenderCallback = () => RenderCallback | null;
+
+let renderQueue: Array<RenderCallback> | null = null;
+// 保存正在等待的异步Task，可以用于取消
+let callingQueueTask: any | null = null;
+// 防止重入
+let isCallingRenderQueue = false;
+
+export function pushRenderCallback(callback: RenderCallback) {
+  if (renderQueue === null) {
+    renderQueue = [callback];
+    // 高优先级的异步调度
+    callingQueueTask = runAsync(callRenderQueue, ImmediatePriority);
+  } else {
+    // 不需要调度，在syncQueue创建的时候已经调度了
+    renderQueue.push(callback);
+  }
+
+  // 返回一个空对象，用于区别null
+  return {};
+}
+
+export function callRenderQueueImmediate() {
+  if (callingQueueTask !== null) {
+    // 取消异步调度
+    cancelTask(callingQueueTask);
+    callingQueueTask = null;
+  }
+
+  callRenderQueue();
+}
+
+// 执行render回调
+function callRenderQueue() {
+  if (!isCallingRenderQueue && renderQueue !== null) {
+    // 防止重入
+    isCallingRenderQueue = true;
+
+    let i = 0;
+    try {
+      for (; i < renderQueue.length; i++) {
+        let callback = renderQueue[i];
+        do {
+          callback = callback();
+        } while (callback !== null);
+      }
+      renderQueue = null;
+    } catch (error) {
+      // 如果有异常抛出，请将剩余的回调留在队列中
+      if (renderQueue !== null) {
+        renderQueue = renderQueue.slice(i + 1);
+      }
+
+      // 在下一个异步中再调用
+      runAsync(callRenderQueueImmediate, ImmediatePriority);
+
+      throw error;
+    } finally {
+      isCallingRenderQueue = false;
+    }
+  }
+}

libs/horizon/src/renderer/taskExecutor/TaskExecutor.ts

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+/**
+ * 调度器的核心实现
+ */
+
+import {
+  requestBrowserCallback,
+  isOverTime,
+  now,
+} from './BrowserAsync';
+
+import {add, shift, first} from './TaskQueue';
+
+const ImmediatePriority = 1;
+const NormalPriority = 10;
+
+// 用于控制插入任务的顺序
+let idCounter = 1;
+
+let currentPriorityLevel = NormalPriority;
+
+// 正在执行task
+let isProcessing = false;
+
+// 调度中，等待浏览器回调
+let isScheduling = false;
+
+function runSync(callback, priorityLevel = NormalPriority) {
+  const previousPriorityLevel = currentPriorityLevel;
+  currentPriorityLevel = priorityLevel;
+
+  try {
+    return callback();
+  } finally {
+    currentPriorityLevel = previousPriorityLevel;
+  }
+}
+
+function runAsync(callback, priorityLevel= NormalPriority ) {
+  let timeout;
+  switch (priorityLevel) {
+    case ImmediatePriority:
+      timeout = -1;
+      break;
+    case NormalPriority:
+    default:
+      timeout = 5000;
+      break;
+  }
+
+  const task = {
+    id: idCounter++,
+    callback,
+    priorityLevel,
+    expirationTime: now() + timeout,
+  };
+
+  add(task);
+
+  if (!isScheduling && !isProcessing) {
+    isScheduling = true;
+    requestBrowserCallback(callTasks);
+  }
+
+  return task;
+}
+
+function callTasks(initialTime) {
+  isScheduling = false;
+  isProcessing = true;
+
+  let task = null;
+  const previousPriorityLevel = currentPriorityLevel;
+  try {
+    let currentTime = initialTime;
+    task = first();
+
+    // 循环执行task
+    while (task !== null) {
+      if (
+        task.expirationTime > currentTime &&
+        isOverTime()
+      ) {
+        // 没到deadline
+        break;
+      }
+
+      const callback = task.callback;
+      if (typeof callback === 'function') {
+        task.callback = null;
+        currentPriorityLevel = task.priorityLevel;
+        const didUserCallbackTimeout = task.expirationTime <= currentTime;
+
+        const continuationCallback = callback(didUserCallbackTimeout);
+        currentTime = now();
+        // 执行callback返回函数，重置callback
+        if (typeof continuationCallback === 'function') {
+          task.callback = continuationCallback;
+        } else {
+          if (task === first()) {
+            shift();
+          }
+        }
+      } else {
+        shift();
+      }
+
+      task = first();
+    }
+
+    // 返回是否还有任务，如果有，说明是被中断了
+    return task !== null;
+  } finally {
+    task = null;
+    currentPriorityLevel = previousPriorityLevel;
+    isProcessing = false;
+  }
+}
+
+function cancelTask(task) {
+  task.callback = null;
+}
+
+function getCurrentPriorityLevel() {
+  return currentPriorityLevel;
+}
+
+export {
+  ImmediatePriority,
+  NormalPriority,
+  runSync,
+  runAsync,
+  cancelTask,
+  getCurrentPriorityLevel,
+  now,
+};

libs/horizon/src/renderer/taskExecutor/TaskQueue.ts

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+/**
+ * 任务列表的实现
+ */
+
+type Queue = Array<Node>;
+type Node = {
+  id: number;
+  expirationTime: number;
+};
+
+// 任务队列
+const taskQueue: Queue = [];
+
+export function add(node: Node): void {
+  // 查找第一个大于等于 value 的下标，都比 value 小则返回 -1
+  const idx = getBiggerIdx(node);
+
+  if (idx === 0) {
+    taskQueue.unshift(node);
+  } else if (idx === -1) {
+    taskQueue.push(node);
+  } else {
+    taskQueue.splice(idx, 0, node);
+  }
+}
+
+// 二分法查找第一个大于等于 value 的下标，都比 value 小则返回 -1，时间复杂度O(logn)
+function getBiggerIdx(node: Node) {
+  let left = 0;
+  let right = taskQueue.length - 1;
+
+  while (left <= right) {
+    const middle = left + ((right - left) >> 1);
+
+    if (compare(taskQueue[middle], node) > 0)
+      right = middle - 1;
+    else
+      left = middle + 1;
+  }
+
+  return (left < taskQueue.length) ? left : -1;
+}
+
+export function first(): Node | null {
+  const val = taskQueue[0];
+  return val !== undefined ? val : null;
+}
+
+export function shift(): Node | null {
+  const val = taskQueue.shift();
+  return val !== undefined ? val : null;
+}
+
+function compare(a: Node, b: Node) {
+  // 优先先用index排序，其次用id
+  const diff = a.expirationTime - b.expirationTime;
+  return diff !== 0 ? diff : a.id - b.id;
+}