Method scrollLeft

src/common/InputHandler.ts:1474–1486

* CSI Ps SP @ Scroll left Ps columns (default = 1) (SL) ECMA-48 * * Notation: (Pn) * Representation: CSI Pn 02/00 04/00 * Parameter default value: Pn = 1 * SL causes the data in the presentation component to be moved by n character positions * if the line orientation is horizontal

(params: IParams)

   * SL has no effect outside of the scroll margins.
   */
  public scrollLeft(params: IParams): boolean {
    if (this._activeBuffer.y > this._activeBuffer.scrollBottom || this._activeBuffer.y < this._activeBuffer.scrollTop) {
      return true;
    }
    const param = params.params[0] || 1;
    for (let y = this._activeBuffer.scrollTop; y <= this._activeBuffer.scrollBottom; ++y) {
      const line = this._activeBuffer.lines.get(this._activeBuffer.ybase + y)!;
      line.deleteCells(0, param, this._activeBuffer.getNullCell(this._eraseAttrData()));
      line.isWrapped = false;
    }
    this._dirtyRowTracker.markRangeDirty(this._activeBuffer.scrollTop, this._activeBuffer.scrollBottom);
    return true;
  }

  /**
   * CSI Ps SP A  Scroll right Ps columns (default = 1) (SR) ECMA-48