apps/window_server/Region.h

   1 #ifndef _REGION_H
   2 #define _REGION_H
   3
   4 #include <win/Rect.h>
   5 #include "assert.h"
   6
   7 using namespace os::gui;
   8
   9 const int COORD_MAX = 0x7ffffff0;
  10
  11 class Region {
  12 public:
  13
  14         Region();
  15         ~Region();
  16         Region(const Region&);
  17         Region& Clear();
  18         Region& Include(const Rect&);
  19         Region& Include(const Region&);
  20         Region& Exclude(const Rect&);
  21         Region& Exclude(const Region&);
  22         Region& Invert();
  23         Region& Intersect(const Region&);
  24         bool Intersects(const Rect&) const;
  25         Region& Translate(int x, int y);
  26         Region& ConstrainTo(const Rect&);
  27         Region& SetTo(const Region&);
  28         Region& operator=(const Region&);
  29
  30         const bool FindRect(int x, int y, Rect &outRect) const;
  31
  32         Rect Bounds() const;
  33         inline bool Valid() const;
  34         inline int CountRects() const;
  35         const Rect& RectAt(int index) const;
  36
  37         void Dump() const;
  38
  39 private:
  40
  41         void AddRect(const Rect&);
  42         void RemoveRect(int index);
  43         void Consolidate();
  44
  45         // Assumes there are no overlaps
  46         void AddRegionRects(const Region&);
  47
  48         void AllocSpace(int numRects);
  49
  50         void BeginOperation();
  51         void EndOperation();
  52
  53         Rect *fRects;
  54         int fNumRects;
  55         int fOpLevel;
  56 };
  57
  58 inline int Region::CountRects() const
  59 {
  60         return fNumRects;
  61 }
  62
  63 inline const Rect& Region::RectAt(int index) const
  64 {
  65         ASSERT(index < fNumRects);
  66         return fRects[index];
  67 }
  68
  69
  70 inline bool Region::Valid() const
  71 {
  72         return fNumRects > 0;
  73 }
  74
  75
  76 #endif