X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2FCoordCache.h;h=99d31a9280156173f4748683203f205bd27f0a0f;hb=af92f60df99994db9f88663a62fa276022b3b2b2;hp=a93696df1e7a9dd0cbd4021b82957d5722ad9985;hpb=137158532b1ac0cde1557226ee486b3fda39b545;p=lyx.git

diff --git a/src/CoordCache.h b/src/CoordCache.h
index a93696df1e..99d31a9280 100644
--- a/src/CoordCache.h
+++ b/src/CoordCache.h
@@ -3,7 +3,7 @@
  * This file is part of LyX, the document processor.
  * Licence details can be found in the file COPYING.
  *
- * \author André Pönitz
+ * \author André Pönitz
  *
  * Full author contact details are available in file CREDITS.
  */
@@ -29,21 +29,36 @@ class Paragraph;
 
 void lyxbreaker(void const * data, const char * hint, int size);
 
-class Point {
-public:
-	Point()
-		: x_(0), y_(0)
-	{}
+struct Geometry {
+	Point pos;
+	Dimension dim;
 
-	Point(int x, int y);
+	bool covers(int x, int y) const
+	{
+		return x >= pos.x_
+			&& x <= pos.x_ + dim.wid
+			&& y >= pos.y_ - dim.asc
+			&& y <= pos.y_ + dim.des;
+	}
 
-	int x_, y_;
-};
+	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;
 
-struct Geometry {
-	Point pos;
-	Dimension dim;
+		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;
+	}
 };
 
 
@@ -66,12 +81,20 @@ public:
 
 	void add(T const * thing, Dimension const & dim)
 	{
+		if (!has(thing))
+			data_[thing].pos = Point(-10000, -10000);
 		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");
+		checkDim(thing, "dim");
 		return data_.find(thing)->second.dim;
 	}
 
@@ -94,19 +117,42 @@ public:
 	}
 
 	bool has(T const * thing) const
+	{
+		typename cache_type::const_iterator it = data_.find(thing);
+
+		if (it == data_.end())
+			return false;
+		return it->second.pos.x_ != -10000;
+	}
+
+	bool hasDim(T const * thing) const
 	{
 		return data_.find(thing) != data_.end();
 	}
 
-//	T * find(int x, int y) const
-//	{
-//		T *
-//		cache_type iter
-//	}
+	bool covers(T const * thing, int x, int y) const
+	{
+		typename cache_type::const_iterator it = data_.find(thing);
+		return it != data_.end() && it->second.covers(x, y);
+	}
+
+	int squareDistance(T const * thing, int x, int y) const
+	{
+		typename cache_type::const_iterator it = data_.find(thing);
+		if (it == data_.end())
+			return 1000000;
+		return it->second.squareDistance(x, y);
+	}
 
 private:
 	friend class CoordCache;
 
+	void checkDim(T const * thing, char const * hint) const
+	{
+		if (!hasDim(thing))
+			lyxbreaker(thing, hint, data_.size());
+	}
+
 	void check(T const * thing, char const * hint) const
 	{
 		if (!has(thing))
@@ -115,20 +161,23 @@ private:
 
 	typedef std::map<T const *, Geometry> cache_type;
 	cache_type data_;
-
-public:
-	cache_type const & getData() const { return data_; }
 };
 
 /**
- * A global cache that allows us to come from a paragraph in a document
- * to a position point on the screen.
+ * A BufferView dependent cache that allows us to come from an inset in
+ * a document to a position point and dimension on the screen.
  * All points cached in this cache are only valid between subsequent
  * updates. (x,y) == (0,0) is the upper left screen corner, x increases
  * to the right, y increases downwords.
- * The cache is built in BufferView::updateMetrics which is called
- * from BufferView::update. The individual points are added
- * while we paint them. See for instance paintPar in RowPainter.C.
+ * The dimension part is built in BufferView::updateMetrics() and the 
+ * diverse Inset::metrics() calls.
+ * The individual points are added at drawing time in
+ * BufferView::updateMetrics(). The math inset position are cached in
+ * the diverse InsetMathXXX::draw() calls and the in-text inset position
+ * are cached in RowPainter::paintInset().
+ * FIXME: For mathed, it would be nice if the insets did not saves their
+ * position themselves. That should be the duty of the containing math
+ * array.
  */
 class CoordCache {
 public: