author L. David Baron <>
Sat, 13 Sep 2014 06:17:36 -0700
changeset 228423 c81eb3a1336b2ab5f4e83b8b5df394dfea8be37e
parent 156841 f10d31a0f7b48383b6d34f66607adc11eb18ec48
child 408563 9becc74079ff446688e59470cc38bd75dc3f5c9e
permissions -rw-r--r--
Bug 977991 patch 1 - Expose variant of RulesMatching on nsHTMLCSSStyleSheet that is less work to call. r=birtles This allows nsStyleSet::RuleNodeWithReplacement to call it without constructing an entire (and unnecessary) ElementRuleProcessorData, which will happen in patch 3.

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
// 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"

typedef void *
(* IntervalSetAlloc)(size_t aBytes, void *aClosure);

typedef void
(* IntervalSetFree) (size_t aBytes, void *aPtr, void *aClosure);

 * 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;

    nsIntervalSet(IntervalSetAlloc aAlloc, IntervalSetFree aFree,
                  void* aAllocatorClosure);

     * 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),

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

    void FreeInterval(Interval *aInterval);

    Interval           *mList;
    IntervalSetAlloc    mAlloc;
    IntervalSetFree     mFree;
    void               *mAllocatorClosure;

#endif // !defined(nsIntervalSet_h___)