Function fits

src/document/printer/printer.js:53–169

* @param {Command} next * @param {Command[]} restCommands * @param {number} remainingWidth * @param {boolean} hasLineSuffix * @param {GroupModeMap} groupModeMap * @param {boolean} [mustBeFlat] * @returns {boolean}

(
  next,
  restCommands,
  remainingWidth,
  hasLineSuffix,
  groupModeMap,
  mustBeFlat,
)

 * @returns {boolean}
 */
function fits(
  next,
  restCommands,
  remainingWidth,
  hasLineSuffix,
  groupModeMap,
  mustBeFlat,
) {
  if (remainingWidth === Number.POSITIVE_INFINITY) {
    return true;
  }

  let restCommandsIndex = restCommands.length;
  let hasPendingSpace = false;
  /** @type {Array<Omit<Command, 'indent'>>} */
  const commands = [next];
  // `output` is only used for width counting because `trim` requires to look
  // backwards for space characters.
  let output = "";
  while (remainingWidth >= 0) {
    if (commands.length === 0) {
      if (restCommandsIndex === 0) {
        return true;
      }
      commands.push(restCommands[--restCommandsIndex]);

      continue;
    }

    const { mode, doc } = commands.pop();
    const docType = getDocType(doc);
    switch (docType) {
      case DOC_TYPE_STRING:
        if (doc) {
          if (hasPendingSpace) {
            output += " ";
            remainingWidth -= 1;
            hasPendingSpace = false;
          }

          output += doc;
          remainingWidth -= getStringWidth(doc);
        }
        break;

      case DOC_TYPE_ARRAY:
      case DOC_TYPE_FILL: {
        const parts = docType === DOC_TYPE_ARRAY ? doc : doc.parts;
        const end = doc[DOC_FILL_PRINTED_LENGTH] ?? 0;
        for (let index = parts.length - 1; index >= end; index--) {
          commands.push({ mode, doc: parts[index] });
        }
        break;
      }

      case DOC_TYPE_INDENT:
      case DOC_TYPE_ALIGN:
      case DOC_TYPE_INDENT_IF_BREAK: