Function printDocToString

src/document/printer/printer.js:179–576

@param {Doc} doc @param {{ printWidth: number, endOfLine: EndOfLineOption, } & IndentOptions} options @returns

(doc, options)

@returns
*/
function printDocToString(doc, options) {
  /** @type GroupModeMap */
  const groupModeMap = Object.create(null);

  const width = options.printWidth;
  const newLine = convertEndOfLineOptionToCharacter(options.endOfLine);
  let position = 0;
  // commands is basically a stack. We've turned a recursive call into a
  // while loop which is much faster. The while loop below adds new
  // commands to the array instead of recursively calling `print`.
  /** @type Command[] */
  const commands = [{ indent: ROOT_INDENT, mode: MODE_BREAK, doc }];
  let shouldRemeasure = false;
  /** @type Command[] */
  const lineSuffix = [];

  const result = new PrintResult();

  propagateBreaks(doc);

  while (commands.length > 0) {
    const { indent, mode, doc } = commands.pop();
    switch (getDocType(doc)) {
      case DOC_TYPE_STRING: {
        const formatted =
          newLine !== "\n" ? doc.replaceAll("\n", newLine) : doc;
        // Plugins may print single string, should skip measure the width
        if (formatted) {
          result.write(formatted);
          if (commands.length > 0) {
            position += getStringWidth(formatted);
          }
        }
        break;
      }

      case DOC_TYPE_ARRAY:
        for (let index = doc.length - 1; index >= 0; index--) {
          commands.push({ indent, mode, doc: doc[index] });
        }
        break;

      case DOC_TYPE_CURSOR:
        result.markPosition();
        break;

      case DOC_TYPE_INDENT:
        commands.push({
          indent: makeIndent(indent, options),
          mode,
          doc: doc.contents,
        });
        break;

      case DOC_TYPE_ALIGN:
        commands.push({
          indent: makeAlign(indent, doc.n, options),
          mode,