Method repeatPrecedingCharacter

src/common/InputHandler.ts:1615–1640

* CSI Ps b Repeat the preceding graphic character Ps times (REP). * From ECMA 48 (@see http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf) * Notation: (Pn) * Representation: CSI Pn 06/02 * Parameter default value: Pn = 1 * REP is used to indicate th

(params: IParams)

   * (NOOP for any other sequence in between or NON ASCII characters).
   */
  public repeatPrecedingCharacter(params: IParams): boolean {
    const joinState = this._parser.precedingJoinState;
    if (!joinState) {
      return true;
    }
    // call print to insert the chars and handle correct wrapping
    const length = params.params[0] || 1;
    const chWidth = UnicodeService.extractWidth(joinState);
    const x = this._activeBuffer.x - chWidth;
    const bufferRow = this._activeBuffer.lines.get(this._activeBuffer.ybase + this._activeBuffer.y)!;
    const text = bufferRow.getString(x);
    const data = new Uint32Array(text.length * length);
    let idata = 0;
    for (let itext = 0; itext < text.length;) {
      const ch = text.codePointAt(itext) || 0;
      data[idata++] = ch;
      itext += ch > 0xffff ? 2 : 1;
    }
    let tlength = idata;
    for (let i = 1; i < length; ++i) {
      data.copyWithin(tlength, 0, idata);
      tlength += idata;
    }
    this.print(data, 0, tlength);
    return true;
  }

  /**
   * CSI Ps c  Send Device Attributes (Primary DA).