* CoordCache: prepare transfer of MathData dimension to arrays cache.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@20464 a592a061-630c-0410-9148-cb99ea01b6c8

diff --git a/src/CoordCache.h b/src/CoordCache.h
index 2b63e6d340a2c5430c45c217355aa28febe62792..1d1876d0666e7f700c0f687d09bde32f802f2291 100644 (file)
--- a/src/CoordCache.h
+++ b/src/CoordCache.h
@@ -52,6 +52,25 @@ struct Geometry {
                        && y >= pos.y_ - dim.asc
                        && y <= pos.y_ + dim.des;
        }
+
+       int squareDistance(int x, int y) const
+       {
+               int xx = 0;
+               int yy = 0;
+
+               if (x < pos.x_)
+                       xx = pos.x_ - x;
+               else if (x > pos.x_ + dim.wid)
+                       xx = x - pos.x_ - dim.wid;
+
+               if (y < pos.y_ - dim.asc)
+                       yy = pos.y_ - dim.asc - y;
+               else if (y > pos.y_ + dim.des)
+                       yy = y - pos.y_ - dim.des;
+
+               // Optimisation: We avoid to compute the sqrt on purpose.
+               return xx*xx + yy*yy;
+       }
 };
 
 
@@ -77,6 +96,12 @@ public:
                data_[thing].dim = dim;
        }
 
+       Geometry const & geometry(T const * thing) const
+       {
+               check(thing, "geometry");
+               return data_.find(thing)->second;
+       }
+
        Dimension const & dim(T const * thing) const
        {
                check(thing, "dim");
@@ -112,6 +137,14 @@ public:
                return it != data_.end() && it->second.covers(x, y);
        }
 
+       int squareDistance(T const * thing, int x, int y) const
+       {
+               cache_type::const_iterator it = data_.find(thing);
+               if (it == data_.end())
+                       return 1000000;
+               return it->second.squareDistance(x, y);
+       }
+
 private:
        friend class CoordCache;