adjust method

@override void adjust()

Adjust this text node by merging it with adjacent nodes if they share the same style.

Implementation

@override
void adjust() {
  if (this is Embed) {
    // Embed nodes cannot be merged with text nor other embeds (in fact,
    // there could be no two adjacent embeds on the same line since an
    // embed occupies an entire line).
    return;
  }

  // This is a text node and it can only be merged with other text nodes.
  var node = this as NodeText;

  // Merging it with previous node if style is the same.
  final prev = node.previous;
  if (!node.isFirst && prev is NodeText && prev.style == node.style) {
    prev._value = prev.value + node.value;
    node.unlink();
    node = prev;
  }

  // Merging it with next node if style is the same.
  final next = node.next;
  if (!node.isLast && next is NodeText && next.style == node.style) {
    node._value = node.value + next.value;
    next.unlink();
  }
}