Method spliceBricks

src/Pipe.js:337–456

* Removes and/or inserts bricks to the pipe at given index maintaining the * content buckets and triggering content propagation when needed. * @param {number} index Index at which bricks should be removed or inserted * @param {number} removeCount Amount of bricks to be removed * @param {

(index, removeCount, bricks = [])

   * @return {Brick[]} Array of bricks that have been removed
   */
  spliceBricks (index, removeCount, bricks = []) {
    // Normalize index
    index = index >= 0 ? index : Math.max(this._bricks.length + index + 1, 0)

    // Reject all bucket listeners before changing bricks
    this._bucketListeners.map(listeners => {
      listeners.forEach(listener => listener.reject(
        'Pipe bricks have been changed.'))
      return []
    })

    // Instanciate serialized bricks
    bricks = bricks.map(brick =>
      !(brick instanceof Brick)
        ? Brick.extract(brick, this.getBrickFactory())
        : brick)

    // Splice internal brick array
    const removedBricks = this._bricks.splice.apply(this._bricks,
      [index, removeCount].concat(bricks))

    // Splice internal state array
    this._brickState.splice.apply(this._brickState,
      [index, removeCount].concat(bricks.map(() => ({
        settingsVersion: 1,
        busy: false
      }))))

    // Prepare added bricks, reset removed bricks
    let bucketInsertCount = 0
    let bucketRemoveCount = 0

    bricks.forEach(brick => {
      brick.setPipe(this)
      this.hasView() && this.getView().addSubview(brick.getView())

      if (brick instanceof Encoder) {
        bucketInsertCount++
      }

      // Track event
      EventManager.trigger('pipeAddBrick', { pipe: this, brick })
    })

    removedBricks.forEach(brick => {
      this.hasView() && this.getView().removeSubview(brick.getView())
      brick.setPipe(null)

      if (brick instanceof Encoder) {
        bucketRemoveCount++
      }

      // Track event
      EventManager.trigger('pipeRemoveBrick', { pipe: this, brick })
    })

    // Update buckets if needed
    if (bucketInsertCount > 0 || bucketRemoveCount > 0) {