Function joinChunks

src/convertFromHTML.js:231–269

(A, B, flat = false)

}

function joinChunks(A, B, flat = false) {
  // Sometimes two blocks will touch in the DOM and we need to strip the
  // extra delimiter to preserve niceness.
  const firstInB = B.text.slice(0, 1);
  const lastInA = A.text.slice(-1);

  const adjacentDividers = lastInA === '\r' && firstInB === '\r';
  const isJoiningBlocks = A.text !== '\r' && B.text !== '\r'; // when joining two full blocks like this we want to pop one divider
  const addingNewlineToEmptyBlock =
    A.text === '\r' && !A.isNewline && B.isNewline; // when joining a newline to an empty block we want to remove the newline

  if (adjacentDividers && (isJoiningBlocks || addingNewlineToEmptyBlock)) {
    A.text = A.text.slice(0, -1);
    A.inlines.pop();
    A.entities.pop();
    A.blocks.pop();
  }

  // Kill whitespace after blocks if flat mode is on
  if (A.text.slice(-1) === '\r' && flat === true) {
    if (B.text === SPACE || B.text === '\n') {
      return A;
    } else if (firstInB === SPACE || firstInB === '\n') {
      B.text = B.text.slice(1);
      B.inlines.shift();
      B.entities.shift();
    }
  }

  const isNewline = A.text.length === 0 && B.isNewline;

  return {
    text: A.text + B.text,
    inlines: A.inlines.concat(B.inlines),
    entities: A.entities.concat(B.entities),
    blocks: A.blocks.concat(B.blocks),
    isNewline,
  };
}

/*
 * Check to see if we have anything like <p> <blockquote> <h1>... to create