/*
 * Copyright (c) 2019-2022, Sjofn LLC
 * All rights reserved.
 *
 * - Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * - Neither the name of the openmetaverse.co nor the names
 *   of its contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

namespace LibreMetaverse.LslTools
{
  public class LineManager
  {
    public int lines = 1;
    public int end;
    public LineList list;

    public void newline(int pos)
    {
      ++this.lines;
      this.backto(pos);
      this.list = new LineList(pos, this.list);
    }

    public void backto(int pos)
    {
      if (pos > this.end)
        this.end = pos;
      while (this.list != null && this.list.head >= pos)
      {
        this.list = this.list.tail;
        --this.lines;
      }
    }

    public void comment(int pos, int len)
    {
      if (pos > this.end)
        this.end = pos;
      if (this.list == null)
      {
        this.list = new LineList(0, this.list);
        this.lines = 1;
      }
      this.list.comments = new CommentList(pos, len, this.list.comments);
    }
  }
}