author Updatebot <>
Thu, 13 May 2021 13:21:58 +0000
changeset 579575 940a3ad12e3dc9b2809b02f6a8ac8e941a50d2a1
parent 472056 e1993a1f09ac53cd1a04fdf6a87f8cad8e44f73e
permissions -rw-r--r--
Bug 1710963 - Update jpeg-xl to 30ea86ab4c1f1b98c21967a2e3d72a51fe77e454 r=saschanaz Differential Revision:

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:ts=8:et:sw=4:
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at */

/* a set of ranges on a number-line */

#ifndef nsIntervalSet_h___
#define nsIntervalSet_h___

#include "nsCoord.h"

namespace mozilla {
class PresShell;
}  // namespace mozilla

 * A list-based class (hopefully tree-based when I get around to it)
 * for representing a set of ranges on a number-line.
class nsIntervalSet {
  typedef nscoord coord_type;

  explicit nsIntervalSet(mozilla::PresShell* aPresShell);

   * Include the interval [aBegin, aEnd] in the set.
   * Removal of intervals added is not supported because that would
   * require keeping track of the individual intervals that were
   * added (nsIntervalMap should do that).  It would be simple to
   * implement ExcludeInterval if anyone wants it, though.
  void IncludeInterval(coord_type aBegin, coord_type aEnd);

   * Are _some_ points in [aBegin, aEnd] contained within the set
   * of intervals?
  bool Intersects(coord_type aBegin, coord_type aEnd) const;

   * Are _all_ points in [aBegin, aEnd] contained within the set
   * of intervals?
  bool Contains(coord_type aBegin, coord_type aEnd) const;

  bool IsEmpty() const { return !mList; }

  class Interval {
    Interval(coord_type aBegin, coord_type aEnd)
        : mBegin(aBegin), mEnd(aEnd), mPrev(nullptr), mNext(nullptr) {}

    coord_type mBegin;
    coord_type mEnd;
    Interval* mPrev;
    Interval* mNext;

  void* AllocateInterval();
  void FreeInterval(Interval* aInterval);

  Interval* mList;
  mozilla::PresShell* mPresShell;

#endif  // !defined(nsIntervalSet_h___)