@atlaskit/editor-common/dist/es2019/node-anchor/dynamic-bit-array.js

A package that contains common classes and components for editor and renderer

const DEFAULT_CHUNK_SIZE = 4096; // Default chunk size in bits

/**
 * A dynamic bit array implementation that allows for efficient storage and manipulation of bits.
 * It supports dynamic resizing and provides methods for setting and getting bit values.
 * This is useful for scenarios where you need to manage a large number of boolean flags efficiently.
 */
export class DynamicBitArray {
  constructor(chunkSize = DEFAULT_CHUNK_SIZE) {
    this.chunkSize = chunkSize;
    this.chunkTotalBitSize = this.chunkSize * 8;
    this.bitArrays = [];
  }
  set(index, value) {
    const bitArray = this.getChunk(index);
    const byteOffset = index % this.chunkTotalBitSize;
    const byteIndex = Math.floor(byteOffset / 8); // Get the byte index
    const bitOffset = byteOffset % 8; // Get the bit offset within the byte

    if (value) {
      bitArray[byteIndex] |= 1 << bitOffset; // set the bit
    } else {
      bitArray[byteIndex] &= ~(1 << bitOffset); // clear the bit
    }
  }
  get(index) {
    const bitArray = this.getChunk(index);
    const byteOffset = index % this.chunkTotalBitSize;
    const byteIndex = Math.floor(byteOffset / 8); // Get the byte index
    const bitOffset = byteOffset % 8; // Get the bit offset within the byte

    return (bitArray[byteIndex] & 1 << bitOffset) !== 0; // Check if the bit is set
  }
  getChunk(index) {
    const chunkIndex = Math.floor(index / this.chunkTotalBitSize);
    if (!this.bitArrays[chunkIndex]) {
      this.bitArrays[chunkIndex] = new Uint8Array(this.chunkSize);
    }
    return this.bitArrays[chunkIndex];
  }
}