@tamagui/react-native-web-lite/dist/esm/InteractionManager/TaskQueue.mjs

React Native for Web

import { invariant } from "@tamagui/react-native-web-internals";
class TaskQueue {
  _queueStack;
  _onMoreTasks;
  constructor({
    onMoreTasks
  }) {
    this._onMoreTasks = onMoreTasks;
    this._queueStack = [{
      tasks: [],
      popable: true
    }];
  }
  enqueue(task) {
    this._getCurrentQueue().push(task);
  }
  enqueueTasks(tasks) {
    tasks.forEach(task => this.enqueue(task));
  }
  cancelTasks(tasksToCancel) {
    this._queueStack = this._queueStack.map(queue => ({
      ...queue,
      tasks: queue.tasks.filter(task => !tasksToCancel.includes(task))
    })).filter((queue, idx) => queue.tasks.length > 0 || idx === 0);
  }
  hasTasksToProcess() {
    return this._getCurrentQueue().length > 0;
  }
  /**
   * Executes the next task in the queue.
   */
  processNext() {
    const queue = this._getCurrentQueue();
    if (queue.length) {
      const task = queue.shift();
      try {
        if (typeof task === "object" && "gen" in task) {
          this._genPromise(task);
        } else if (typeof task === "object" && "run" in task) {
          task.run();
        } else {
          invariant(typeof task === "function", "Expected Function, SimpleTask, or PromiseTask, but got:\n" + JSON.stringify(task, null, 2));
          task();
        }
      } catch (e) {
        if (e instanceof Error) {
          e.message = "TaskQueue: Error with task " + (task?.name || "") + ": " + e.message;
        }
        throw e;
      }
    }
  }
  _getCurrentQueue() {
    const stackIdx = this._queueStack.length - 1;
    const queue = this._queueStack[stackIdx];
    if (queue.popable && queue.tasks.length === 0 && stackIdx > 0) {
      this._queueStack.pop();
      return this._getCurrentQueue();
    } else {
      return queue.tasks;
    }
  }
  _genPromise(task) {
    const length = this._queueStack.push({
      tasks: [],
      popable: false
    });
    const stackIdx = length - 1;
    const stackItem = this._queueStack[stackIdx];
    task.gen().then(() => {
      stackItem.popable = true;
      if (this.hasTasksToProcess()) {
        this._onMoreTasks();
      }
    }).catch(ex => {
      setTimeout(() => {
        if (ex instanceof Error) {
          ex.message = `TaskQueue: Error resolving Promise in task ${task.name}: ${ex.message}`;
        }
        throw ex;
      }, 0);
    });
  }
}
export { TaskQueue };
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