1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 // vim:cindent:ts=8:et:sw=4:
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 /* a set of ranges on a number-line */
9 #ifndef nsIntervalSet_h___
10 #define nsIntervalSet_h___
16 } // namespace mozilla
19 * A list-based class (hopefully tree-based when I get around to it)
20 * for representing a set of ranges on a number-line.
24 typedef nscoord coord_type
;
26 explicit nsIntervalSet(mozilla::PresShell
* aPresShell
);
30 * Include the interval [aBegin, aEnd] in the set.
32 * Removal of intervals added is not supported because that would
33 * require keeping track of the individual intervals that were
34 * added (nsIntervalMap should do that). It would be simple to
35 * implement ExcludeInterval if anyone wants it, though.
37 void IncludeInterval(coord_type aBegin
, coord_type aEnd
);
40 * Are _some_ points in [aBegin, aEnd] contained within the set
43 bool Intersects(coord_type aBegin
, coord_type aEnd
) const;
46 * Are _all_ points in [aBegin, aEnd] contained within the set
49 bool Contains(coord_type aBegin
, coord_type aEnd
) const;
51 bool IsEmpty() const { return !mList
; }
56 Interval(coord_type aBegin
, coord_type aEnd
)
57 : mBegin(aBegin
), mEnd(aEnd
), mPrev(nullptr), mNext(nullptr) {}
65 void* AllocateInterval();
66 void FreeInterval(Interval
* aInterval
);
69 mozilla::PresShell
* mPresShell
;
72 #endif // !defined(nsIntervalSet_h___)