Method removeTextAtRange

src/trix/models/document.js:139–186

(range)

  }

  removeTextAtRange(range) {
    let blocks
    range = normalizeRange(range)
    const [ leftPosition, rightPosition ] = range
    if (rangeIsCollapsed(range)) {
      return this
    }
    const [ leftLocation, rightLocation ] = Array.from(this.locationRangeFromRange(range))

    const leftIndex = leftLocation.index
    const leftOffset = leftLocation.offset
    const leftBlock = this.getBlockAtIndex(leftIndex)

    const rightIndex = rightLocation.index
    const rightOffset = rightLocation.offset
    const rightBlock = this.getBlockAtIndex(rightIndex)

    const removeRightNewline =
      rightPosition - leftPosition === 1 &&
      leftBlock.getBlockBreakPosition() === leftOffset &&
      rightBlock.getBlockBreakPosition() !== rightOffset &&
      rightBlock.text.getStringAtPosition(rightOffset) === "\n"

    if (removeRightNewline) {
      blocks = this.blockList.editObjectAtIndex(rightIndex, (block) =>
        block.copyWithText(block.text.removeTextAtRange([ rightOffset, rightOffset + 1 ]))
      )
    } else {
      let block
      const leftText = leftBlock.text.getTextAtRange([ 0, leftOffset ])
      const rightText = rightBlock.text.getTextAtRange([ rightOffset, rightBlock.getLength() ])
      const text = leftText.appendText(rightText)

      const removingLeftBlock = leftIndex !== rightIndex && leftOffset === 0
      const useRightBlock = removingLeftBlock && leftBlock.getAttributeLevel() >= rightBlock.getAttributeLevel()

      if (useRightBlock) {
        block = rightBlock.copyWithText(text)
      } else {
        block = leftBlock.copyWithText(text)
      }

      const affectedBlockCount = rightIndex + 1 - leftIndex
      blocks = this.blockList.splice(leftIndex, affectedBlockCount, block)
    }

    return new this.constructor(blocks)
  }

  moveTextFromRangeToPosition(range, position) {
    let text