Method insert

src/components/blocks.ts:189–222

* Insert new Block at passed index * * @param {number} index — index to insert Block * @param {Block} block — Block to insert * @param {boolean} replace — it true, replace block on given index

(index: number, block: Block, replace = false)

   * @param {boolean} replace — it true, replace block on given index
   */
  public insert(index: number, block: Block, replace = false): void {
    if (!this.length) {
      this.push(block);

      return;
    }

    if (index > this.length) {
      index = this.length;
    }

    if (replace) {
      this.blocks[index].holder.remove();
      this.blocks[index].call(BlockToolAPI.REMOVED);
    }

    const deleteCount = replace ? 1 : 0;

    this.blocks.splice(index, deleteCount, block);

    if (index > 0) {
      const previousBlock = this.blocks[index - 1];

      this.insertToDOM(block, 'afterend', previousBlock);
    } else {
      const nextBlock = this.blocks[index + 1];

      if (nextBlock) {
        this.insertToDOM(block, 'beforebegin', nextBlock);
      } else {
        this.insertToDOM(block);
      }
    }
  }

  /**
   * Replaces block under passed index with passed block