Method stringifyNode

src/lib/parser/tree.ts:230–303

(
    node: Node,
    options: StringifyOptions = {},
    indentLevel: number = 0,
    offset: number = 0, // the starting offset of the current node in the stringify text.
    boundOffset: number = 0, // the starting offset of the current node's bound in the stringify text.
    genTabs: ReturnType<typeof getGenTabsFn> = getGenTabsFn(options.tabWidth || 2),
  )

  // TODO support pretty format
  stringifyNode(
    node: Node,
    options: StringifyOptions = {},
    indentLevel: number = 0,
    offset: number = 0, // the starting offset of the current node in the stringify text.
    boundOffset: number = 0, // the starting offset of the current node's bound in the stringify text.
    genTabs: ReturnType<typeof getGenTabsFn> = getGenTabsFn(options.tabWidth || 2),
  ): string {
    if (!isIterable(node)) {
      const stringified = getRawValue(node)!;

      if (!options.pure) {
        node.length = stringified.length;
        node.offset = offset;
        node.boundOffset = boundOffset ?? node.offset;
        computeAndSetBoundLength(node);
      }

      return stringified;
    }

    // for array or object, the bound width is equal to the node width
    if (!options.pure) {
      node.boundOffset = boundOffset ?? 0;
      node.offset = offset;
    }

    const isFormat = options?.format === true;
    const isObject = node.type === "object";
    let stringified = isObject ? "{" : "[";

    const keys = getChildrenKeys(node);

    if (isObject) {
      if (options?.sort === "asc") {
        keys.sort();
      } else if (options?.sort === "desc") {
        keys.sort().reverse();
      }
    }

    for (let i = 0; i < keys.length; i++) {
      const key = keys[i];
      const child = this.getChild(node, key)!;

      if (isFormat) {
        stringified += "\n" + genTabs(indentLevel + 1);
      }

      const childBoundOffset = offset + stringified.length;
      if (isObject) {
        const keyText = escape(key);
        stringified += `"${keyText}":${isFormat ? " " : ""}`;
      }
      const childOffset = offset + stringified.length;

      stringified += this.stringifyNode(child, options, indentLevel + 1, childOffset, childBoundOffset, genTabs);