Method replaceCells

src/common/buffer/BufferLine.ts:311–341

(start: number, end: number, fillCellData: ICellData, respectProtect: boolean = false)

  }

  public replaceCells(start: number, end: number, fillCellData: ICellData, respectProtect: boolean = false): void {
    // full branching on respectProtect==true, hopefully getting fast JIT for standard case
    if (respectProtect) {
      if (start && this.getWidth(start - 1) === 2 && !this.isProtected(start - 1)) {
        this.setCellFromCodepoint(start - 1, 0, 1, fillCellData);
      }
      if (end < this.length && this.getWidth(end - 1) === 2 && !this.isProtected(end)) {
        this.setCellFromCodepoint(end, 0, 1, fillCellData);
      }
      while (start < end  && start < this.length) {
        if (!this.isProtected(start)) {
          this.setCell(start, fillCellData);
        }
        start++;
      }
      return;
    }

    // handle fullwidth at start: reset cell one to the left if start is second cell of a wide char
    if (start && this.getWidth(start - 1) === 2) {
      this.setCellFromCodepoint(start - 1, 0, 1, fillCellData);
    }
    // handle fullwidth at last cell + 1: reset to empty cell if it is second part of a wide char
    if (end < this.length && this.getWidth(end - 1) === 2) {
      this.setCellFromCodepoint(end, 0, 1, fillCellData);
    }

    while (start < end  && start < this.length) {
      this.setCell(start++, fillCellData);
    }
  }

  /**
   * Resize BufferLine to `cols` filling excess cells with `fillCellData`.