#include <map>
-
-// All positions cached in this cache are only valid between subsequent
-// updated. (x,y) == (0,0) is the upper left screen corner, x increases
-// to the right, y increases downwords.
-
void lyxbreaker(void const * data, const char * hint, int size);
-void lyxaborter(int x, int y);
-struct Point {
+class Point {
+public:
Point()
: x_(0), y_(0)
{}
cache_type data_;
};
-
+/**
+ * A global cache that allows us to come from a paragraph in a document
+ * to a position point on the screen.
+ * All points cached in this cache are only valid between subsequent
+ * updated. (x,y) == (0,0) is the upper left screen corner, x increases
+ * to the right, y increases downwords.
+ * The cache is built in BufferView::Pimpl::metrics which is called
+ * from BufferView::Pimpl::update. The individual points are added
+ * while we paint them. See for instance paintPar in RowPainter.C.
+ */
class CoordCache {
public:
+ CoordCache() : updating(false) { }
+ /// In order to find bugs, we record when we start updating the cache
+ void startUpdating();
+ /// When we are done, we record that to help find bugs
+ void doneUpdating();
+
void clear();
Point get(LyXText const *, lyx::pit_type);
+ /// A map from paragraph index number to screen point
+ typedef std::map<lyx::pit_type, Point> InnerParPosCache;
+ /// A map from a LyXText to the map of paragraphs to screen points
+ typedef std::map<LyXText const *, InnerParPosCache> ParPosCache;
+
+ /// A map from MathArray to position on the screen
+ CoordCacheBase<MathArray> & arrays() { BOOST_ASSERT(updating); return arrays_; }
+ CoordCacheBase<MathArray> const & getArrays() const { return arrays_; }
+ /// A map from insets to positions on the screen
+ CoordCacheBase<InsetBase> & insets() { BOOST_ASSERT(updating); return insets_; }
+ CoordCacheBase<InsetBase> const & getInsets() const { return insets_; }
+ /// A map from (LyXText, paragraph) pair to screen positions
+ ParPosCache & parPos() { BOOST_ASSERT(updating); return pars_; }
+ ParPosCache const & getParPos() const { return pars_; }
+private:
CoordCacheBase<MathArray> arrays_;
// all insets
CoordCacheBase<InsetBase> insets_;
// paragraph grouped by owning text
- typedef std::map<lyx::pit_type, Point> InnerParPosCache;
- typedef std::map<LyXText const *, InnerParPosCache> ParPosCache;
ParPosCache pars_;
+
+ /**
+ * Debugging flag only: Set to true while the cache is being built.
+ * No changes to the structure are allowed unless we are updating.
+ */
+ bool updating;
};
extern CoordCache theCoords;