From: Abdelrazak Younes <younes@lyx.org>
Date: Mon, 24 Sep 2007 13:47:03 +0000 (+0000)
Subject: * CoordCache: prepare transfer of MathData dimension to arrays cache.
X-Git-Tag: 1.6.10~8209
X-Git-Url: https://git.lyx.org/gitweb/?a=commitdiff_plain;h=a42571cab47e21e76e39aa4e53a94a68969f5d0b;p=lyx.git

* 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 2b63e6d340..1d1876d066 100644
--- 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;