зеркало из https://github.com/mozilla/gecko-dev.git
129 строки
3.9 KiB
C++
129 строки
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
// vim:cindent:ts=8:et:sw=4:
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is nsIntervalSet.
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape Communications
|
|
* Corporation. Portions created by the Initial Developer are Copyright
|
|
* (C) 2001 the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* L. David Baron <dbaron@dbaron.org> (original author)
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/* a set of ranges on a number-line */
|
|
|
|
#ifndef nsIntervalSet_h___
|
|
#define nsIntervalSet_h___
|
|
|
|
#include "prtypes.h"
|
|
#include "nsCoord.h"
|
|
#include "nsDebug.h"
|
|
|
|
typedef void *
|
|
(* PR_CALLBACK IntervalSetAlloc)(size_t aBytes, void *aClosure);
|
|
|
|
typedef void
|
|
(* PR_CALLBACK 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 {
|
|
|
|
public:
|
|
|
|
typedef nscoord coord_type;
|
|
|
|
nsIntervalSet(IntervalSetAlloc aAlloc, IntervalSetFree aFree,
|
|
void* aAllocatorClosure);
|
|
~nsIntervalSet();
|
|
|
|
/*
|
|
* 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);
|
|
|
|
/*
|
|
* Is the point aPoint contained within the set of intervals?
|
|
*/
|
|
PRBool HasPoint(coord_type aPoint) const;
|
|
|
|
/*
|
|
* Are _some_ points in [aBegin, aEnd] contained within the set
|
|
* of intervals?
|
|
*/
|
|
PRBool Intersects(coord_type aBegin, coord_type aEnd) const;
|
|
|
|
/*
|
|
* Are _all_ points in [aBegin, aEnd] contained within the set
|
|
* of intervals?
|
|
*/
|
|
PRBool Contains(coord_type aBegin, coord_type aEnd) const;
|
|
|
|
PRBool IsEmpty() const
|
|
{
|
|
return !mList;
|
|
}
|
|
|
|
private:
|
|
|
|
class Interval {
|
|
|
|
public:
|
|
Interval(coord_type aBegin, coord_type aEnd)
|
|
: mBegin(aBegin),
|
|
mEnd(aEnd),
|
|
mPrev(nsnull),
|
|
mNext(nsnull)
|
|
{
|
|
}
|
|
|
|
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___)
|