Method readBlockScalar

yaml/_loader_state.ts:1006–1165

(
    tag: string | null,
    anchor: string | null,
    nodeIndent: number,
  )

  // Handles block scaler styles: e.g. '|', '>', '|-' and '>-'.
  // https://yaml.org/spec/1.2.2/#81-block-scalar-styles
  readBlockScalar(
    tag: string | null,
    anchor: string | null,
    nodeIndent: number,
  ): State | void {
    let chomping = CHOMPING_CLIP;
    let didReadContent = false;
    let detectedIndent = false;
    let textIndent = nodeIndent;
    let emptyLines = 0;
    let atMoreIndented = false;

    let ch = this.#scanner.peek();

    let folding = false;
    if (ch === VERTICAL_LINE) {
      folding = false;
    } else if (ch === GREATER_THAN) {
      folding = true;
    } else {
      return;
    }

    let result = "";

    let tmp = 0;
    while (ch !== 0) {
      this.#scanner.next();
      ch = this.#scanner.peek();

      if (ch === PLUS || ch === MINUS) {
        if (CHOMPING_CLIP === chomping) {
          chomping = ch === PLUS ? CHOMPING_KEEP : CHOMPING_STRIP;
        } else {
          throw this.#createError(
            "Cannot read block: chomping mode identifier repeated",
          );
        }
      } else if ((tmp = decimalCharCodeToNumber(ch)) >= 0) {
        if (tmp === 0) {
          throw this.#createError(
            "Cannot read block: indentation width must be greater than 0",
          );
        } else if (!detectedIndent) {
          textIndent = nodeIndent + tmp - 1;
          detectedIndent = true;
        } else {
          throw this.#createError(
            "Cannot read block: indentation width identifier repeated",
          );
        }
      } else {
        break;
      }
    }

    if (isWhiteSpace(ch)) {
      this.skipWhitespaces();