Method mergeDocumentAtRange

src/trix/models/document.js:91–124

(document, range)

  }

  mergeDocumentAtRange(document, range) {
    let formattedDocument, result
    range = normalizeRange(range)
    const [ startPosition ] = range
    const startLocation = this.locationFromPosition(startPosition)
    const blockAttributes = this.getBlockAtIndex(startLocation.index).getAttributes()
    const baseBlockAttributes = document.getBaseBlockAttributes()
    const trailingBlockAttributes = blockAttributes.slice(-baseBlockAttributes.length)

    if (arraysAreEqual(baseBlockAttributes, trailingBlockAttributes)) {
      const leadingBlockAttributes = blockAttributes.slice(0, -baseBlockAttributes.length)
      formattedDocument = document.copyWithBaseBlockAttributes(leadingBlockAttributes)
    } else {
      formattedDocument = document.copy({ consolidateBlocks: true }).copyWithBaseBlockAttributes(blockAttributes)
    }

    const blockCount = formattedDocument.getBlockCount()
    const firstBlock = formattedDocument.getBlockAtIndex(0)

    if (arraysAreEqual(blockAttributes, firstBlock.getAttributes())) {
      const firstText = firstBlock.getTextWithoutBlockBreak()
      result = this.insertTextAtRange(firstText, range)

      if (blockCount > 1) {
        formattedDocument = new this.constructor(formattedDocument.getBlocks().slice(1))
        const position = startPosition + firstText.getLength()
        result = result.insertDocumentAtRange(formattedDocument, position)
      }
    } else {
      result = this.insertDocumentAtRange(formattedDocument, range)
    }

    return result
  }

  insertTextAtRange(text, range) {
    range = normalizeRange(range)