X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=src%2Fsnap.h;h=e0217948fe3cfdb4b0f7a96b2841096512dd49c1;hb=724821145d62dee9f97465c706952582da6e432d;hp=49c4987898dc8ee454404a4c40dfc7de718faf14;hpb=54ea0b53861e527030823a451265564f8c9b5584;p=inkscape.git

diff --git a/src/snap.h b/src/snap.h
index 49c498789..e0217948f 100644
--- a/src/snap.h
+++ b/src/snap.h
@@ -3,13 +3,14 @@
 
 /**
  * \file snap.h
- * \brief Various snapping methods.
+ * \brief SnapManager class.
  *
  * Authors:
  *   Lauris Kaplinski <lauris@kaplinski.com>
  *   Frank Felfe <innerspace@iname.com>
  *   Carl Hetherington <inkscape@carlh.net>
  *
+ * Copyright (C) 2006-2007 Johan Engelen <johan@shouraizou.nl>
  * Copyright (C) 2000-2002 Lauris Kaplinski
  *
  * Released under GNU GPL, read the file 'COPYING' for more information
@@ -20,16 +21,28 @@
 #include <libnr/nr-coord.h>
 #include <libnr/nr-dim2.h>
 #include <libnr/nr-forward.h>
-#include "grid-snapper.h"
+#include <libnr/nr-scale.h>
 #include "guide-snapper.h"
 #include "object-snapper.h"
 
 class SPNamedView;
 
+/// Class to coordinate snapping operations
+
+/**
+ *  Each SPNamedView has one of these.  It offers methods to snap points to whatever
+ *  snappers are defined (e.g. grid, guides etc.).  It also allows callers to snap
+ *  points which have undergone some transformation (e.g. translation, scaling etc.)
+ */
+
 class SnapManager
 {
 public:
-    bool willSnapSomething() const;
+    SnapManager(SPNamedView const *v);
+
+    typedef std::list<const Inkscape::Snapper*> SnapperList;
+
+    bool SomeSnapperMightSnap() const;
 
     Inkscape::SnappedPoint freeSnap(Inkscape::Snapper::PointType t,
                                     NR::Point const &p,
@@ -38,15 +51,30 @@ public:
     Inkscape::SnappedPoint freeSnap(Inkscape::Snapper::PointType t,
                                     NR::Point const &p,
                                     std::list<SPItem const *> const &it) const;
-    
+
+     Inkscape::SnappedPoint freeSnap( Inkscape::Snapper::PointType t,
+                                      NR::Point const &p,
+                                      std::list<SPItem const *> const &it,
+                                      SnapperList const &snappers ) const;
+
+    Inkscape::SnappedPoint freeSnapAlways( Inkscape::Snapper::PointType t,
+                                           NR::Point const &p,
+                                           SPItem const *it,
+                                           SnapperList &snappers );
+
+    Inkscape::SnappedPoint freeSnapAlways( Inkscape::Snapper::PointType t,
+                                           NR::Point const &p,
+                                           std::list<SPItem const *> const &it,
+                                           SnapperList &snappers );
+
     Inkscape::SnappedPoint constrainedSnap(Inkscape::Snapper::PointType t,
                                            NR::Point const &p,
-                                           NR::Point const &c,
+                                           Inkscape::Snapper::ConstraintLine const &c,
                                            SPItem const *it) const;
     
     Inkscape::SnappedPoint constrainedSnap(Inkscape::Snapper::PointType t,
                                            NR::Point const &p,
-                                           NR::Point const &c,
+                                           Inkscape::Snapper::ConstraintLine const &c,
                                            std::list<SPItem const *> const &it) const;
 
     std::pair<NR::Point, bool> freeSnapTranslation(Inkscape::Snapper::PointType t,
@@ -56,47 +84,67 @@ public:
 
     std::pair<NR::Point, bool> constrainedSnapTranslation(Inkscape::Snapper::PointType t,
                                                           std::vector<NR::Point> const &p,
-                                                          NR::Point const &c,
                                                           std::list<SPItem const *> const &it,
+                                                          Inkscape::Snapper::ConstraintLine const &c,
                                                           NR::Point const &tr) const;
 
-    Inkscape::GridSnapper grid;
-    Inkscape::GuideSnapper guide;
-    Inkscape::ObjectSnapper object;
+    std::pair<NR::scale, bool> freeSnapScale(Inkscape::Snapper::PointType t,
+                                             std::vector<NR::Point> const &p,
+                                             std::list<SPItem const *> const &it,
+                                             NR::scale const &s,
+                                             NR::Point const &o) const;
+
+    std::pair<NR::scale, bool> constrainedSnapScale(Inkscape::Snapper::PointType t,
+                                                    std::vector<NR::Point> const &p,
+                                                    std::list<SPItem const *> const &it,
+                                                    Inkscape::Snapper::ConstraintLine const &c,
+                                                    NR::scale const &s,
+                                                    NR::Point const &o) const;
+
+    std::pair<NR::Coord, bool> freeSnapStretch(Inkscape::Snapper::PointType t,
+                                               std::vector<NR::Point> const &p,
+                                               std::list<SPItem const *> const &it,
+                                               NR::Coord const &s,
+                                               NR::Point const &o,
+                                               NR::Dim2 d,
+                                               bool uniform) const;
+
+    std::pair<NR::Coord, bool> freeSnapSkew(Inkscape::Snapper::PointType t,
+                                            std::vector<NR::Point> const &p,
+                                            std::list<SPItem const *> const &it,
+                                            NR::Coord const &s,
+                                            NR::Point const &o,
+                                            NR::Dim2 d) const;
+
+    Inkscape::GuideSnapper guide;      ///< guide snapper
+    Inkscape::ObjectSnapper object;    ///< snapper to other objects
 
-    typedef std::list<const Inkscape::Snapper*> SnapperList;
     SnapperList getSnappers() const;
-};
-
+    SnapperList getGridSnappers() const;
 
-/* Single point methods */
-NR::Coord namedview_vector_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point &req,
-                                NR::Point const &d, std::list<SPItem const *> const &it);
-NR::Coord namedview_vector_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point &req,
-                                NR::Point const &d, SPItem const *it);
-NR::Coord namedview_dim_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point& req,
-                             NR::Dim2 const dim, SPItem const *it);
-NR::Coord namedview_dim_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point& req,
-                             NR::Dim2 const dim, std::list<SPItem const *> const &it);
+protected:
+    SPNamedView const *_named_view;
 
-/* List of points methods */
-
-std::pair<double, bool> namedview_vector_snap_list(SPNamedView const *nv,
-                                                   Inkscape::Snapper::PointType t, const std::vector<NR::Point> &p,
-                                                   NR::Point const &norm, NR::scale const &s,
-                                                   std::list<SPItem const *> const &it
-                                                   );
-
-std::pair<double, bool> namedview_dim_snap_list_scale(SPNamedView const *nv,
-                                                      Inkscape::Snapper::PointType t, const std::vector<NR::Point> &p,
-                                                      NR::Point const &norm, double const sx,
-                                                      NR::Dim2 const dim,
-                                                      std::list<SPItem const *> const &it);
-
-NR::Coord namedview_dim_snap_list_skew(SPNamedView const *nv, Inkscape::Snapper::PointType t,
-                                       const std::vector<NR::Point> &p,
-                                       NR::Point const &norm, double const sx, NR::Dim2 const dim);
+private:
 
+    enum Transformation {
+        TRANSLATION,
+        SCALE,
+        STRETCH,
+        SKEW
+    };
+    
+    std::pair<NR::Point, bool> _snapTransformed(Inkscape::Snapper::PointType type,
+                                                std::vector<NR::Point> const &points,
+                                                std::list<SPItem const *> const &ignore,
+                                                bool constrained,
+                                                Inkscape::Snapper::ConstraintLine const &constraint,
+                                                Transformation transformation_type,
+                                                NR::Point const &transformation,
+                                                NR::Point const &origin,
+                                                NR::Dim2 dim,
+                                                bool uniform) const;
+};
 
 #endif /* !SEEN_SNAP_H */