The Tor Browser / file comparison
comparison: layout/generic/nsIntervalSet.h
layout/generic/nsIntervalSet.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
deleted
inserted
replaced
| -1:000000000000 | 0:b7de363cece1 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 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/. */ | |
| 6 | |
| 7 /* a set of ranges on a number-line */ | |
| 8 | |
| 9 #ifndef nsIntervalSet_h___ | |
| 10 #define nsIntervalSet_h___ | |
| 11 | |
| 12 #include "nsCoord.h" | |
| 13 | |
| 14 typedef void * | |
| 15 (* IntervalSetAlloc)(size_t aBytes, void *aClosure); | |
| 16 | |
| 17 typedef void | |
| 18 (* IntervalSetFree) (size_t aBytes, void *aPtr, void *aClosure); | |
| 19 | |
| 20 /* | |
| 21 * A list-based class (hopefully tree-based when I get around to it) | |
| 22 * for representing a set of ranges on a number-line. | |
| 23 */ | |
| 24 class nsIntervalSet { | |
| 25 | |
| 26 public: | |
| 27 | |
| 28 typedef nscoord coord_type; | |
| 29 | |
| 30 nsIntervalSet(IntervalSetAlloc aAlloc, IntervalSetFree aFree, | |
| 31 void* aAllocatorClosure); | |
| 32 ~nsIntervalSet(); | |
| 33 | |
| 34 /* | |
| 35 * Include the interval [aBegin, aEnd] in the set. | |
| 36 * | |
| 37 * Removal of intervals added is not supported because that would | |
| 38 * require keeping track of the individual intervals that were | |
| 39 * added (nsIntervalMap should do that). It would be simple to | |
| 40 * implement ExcludeInterval if anyone wants it, though. | |
| 41 */ | |
| 42 void IncludeInterval(coord_type aBegin, coord_type aEnd); | |
| 43 | |
| 44 /* | |
| 45 * Are _some_ points in [aBegin, aEnd] contained within the set | |
| 46 * of intervals? | |
| 47 */ | |
| 48 bool Intersects(coord_type aBegin, coord_type aEnd) const; | |
| 49 | |
| 50 /* | |
| 51 * Are _all_ points in [aBegin, aEnd] contained within the set | |
| 52 * of intervals? | |
| 53 */ | |
| 54 bool Contains(coord_type aBegin, coord_type aEnd) const; | |
| 55 | |
| 56 bool IsEmpty() const | |
| 57 { | |
| 58 return !mList; | |
| 59 } | |
| 60 | |
| 61 private: | |
| 62 | |
| 63 class Interval { | |
| 64 | |
| 65 public: | |
| 66 Interval(coord_type aBegin, coord_type aEnd) | |
| 67 : mBegin(aBegin), | |
| 68 mEnd(aEnd), | |
| 69 mPrev(nullptr), | |
| 70 mNext(nullptr) | |
| 71 { | |
| 72 } | |
| 73 | |
| 74 coord_type mBegin; | |
| 75 coord_type mEnd; | |
| 76 Interval *mPrev; | |
| 77 Interval *mNext; | |
| 78 }; | |
| 79 | |
| 80 void FreeInterval(Interval *aInterval); | |
| 81 | |
| 82 Interval *mList; | |
| 83 IntervalSetAlloc mAlloc; | |
| 84 IntervalSetFree mFree; | |
| 85 void *mAllocatorClosure; | |
| 86 | |
| 87 }; | |
| 88 | |
| 89 #endif // !defined(nsIntervalSet_h___) |
