Method deleteInDirection

src/trix/models/composition.js:207–253

(direction, { length } = {})

  }

  deleteInDirection(direction, { length } = {}) {
    let attachment, deletingIntoPreviousBlock, selectionSpansBlocks
    const locationRange = this.getLocationRange()
    let range = this.getSelectedRange()
    const selectionIsCollapsed = rangeIsCollapsed(range)

    if (selectionIsCollapsed) {
      deletingIntoPreviousBlock = direction === "backward" && locationRange[0].offset === 0
    } else {
      selectionSpansBlocks = locationRange[0].index !== locationRange[1].index
    }

    if (deletingIntoPreviousBlock) {
      if (this.canDecreaseBlockAttributeLevel()) {
        const block = this.getBlock()

        if (block.isListItem()) {
          this.decreaseListLevel()
        } else {
          this.decreaseBlockAttributeLevel()
        }

        this.setSelection(range[0])
        if (block.isEmpty()) {
          return false
        }
      }
    }

    if (selectionIsCollapsed) {
      range = this.getExpandedRangeInDirection(direction, { length })
      if (direction === "backward") {
        attachment = this.getAttachmentAtRange(range)
      }
    }

    if (attachment) {
      this.editAttachment(attachment)
      return false
    } else {
      this.setDocument(this.document.removeTextAtRange(range))
      this.setSelection(range[0])
      if (deletingIntoPreviousBlock || selectionSpansBlocks) {
        return false
      }
    }
  }

  moveTextFromRange(range) {
    const [ position ] = Array.from(this.getSelectedRange())