Issue 5167/6: Changes: show \markup xxx = ... \etc assignments

[lilypond.git] / lily / pure-from-neighbor-engraver.cc

diff --git a/lily/pure-from-neighbor-engraver.cc b/lily/pure-from-neighbor-engraver.cc
index 506127c50dd25b95e553d589ef27eeaf556e3068..cea3936161c4c62357250ca9ca664b7a00275bcb 100644 (file)
--- a/lily/pure-from-neighbor-engraver.cc
+++ b/lily/pure-from-neighbor-engraver.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 2011 Mike Solomon <mike@apollinemike.com>
+  Copyright (C) 2011--2015 Mike Solomon <mike@mikesolomon.org>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -26,6 +26,8 @@
 #include "pure-from-neighbor-interface.hh"
 #include "engraver.hh"
 
+#include "translator.icc"
+
 class Pure_from_neighbor_engraver : public Engraver
 {
   vector<Grob *> pure_relevants_;
@@ -34,24 +36,34 @@ class Pure_from_neighbor_engraver : public Engraver
 public:
   TRANSLATOR_DECLARATIONS (Pure_from_neighbor_engraver);
 protected:
-  DECLARE_ACKNOWLEDGER (pure_from_neighbor);
-  DECLARE_ACKNOWLEDGER (item);
+  void acknowledge_pure_from_neighbor (Grob_info);
+  void acknowledge_item (Grob_info);
   void finalize ();
 };
 
-Pure_from_neighbor_engraver::Pure_from_neighbor_engraver ()
+Pure_from_neighbor_engraver::Pure_from_neighbor_engraver (Context *c)
+  : Engraver (c)
 {
 }
 
 void
 Pure_from_neighbor_engraver::acknowledge_item (Grob_info i)
 {
-  SCM pure_relevant_p = ly_lily_module_constant ("pure-relevant?");
-  if (!Pure_from_neighbor_interface::has_interface (i.item ())
-      && to_boolean (scm_call_1 (pure_relevant_p, i.item ()->self_scm ())))
+  if (!has_interface<Pure_from_neighbor_interface> (i.item ()))
     pure_relevants_.push_back (i.item ());
 }
 
+bool
+in_same_column (Grob *g1, Grob *g2)
+{
+  return (g1->spanned_rank_interval ()[LEFT]
+          == g2->spanned_rank_interval ()[LEFT])
+         && (g1->spanned_rank_interval ()[RIGHT]
+             == g2->spanned_rank_interval ()[RIGHT])
+         && (g1->spanned_rank_interval ()[LEFT]
+             == g1->spanned_rank_interval ()[RIGHT]);
+}
+
 void
 Pure_from_neighbor_engraver::acknowledge_pure_from_neighbor (Grob_info i)
 {
@@ -80,8 +92,10 @@ Pure_from_neighbor_engraver::finalize ()
       temp.push_back (need_pure_heights_from_neighbors_[l]);
       for (;
            (l < need_pure_heights_from_neighbors_.size () - 1
-            && (need_pure_heights_from_neighbors_[l]->spanned_rank_interval ()[LEFT]
-                == need_pure_heights_from_neighbors_[l + 1]->spanned_rank_interval ()[LEFT]));
+            && ((need_pure_heights_from_neighbors_[l]
+                 ->spanned_rank_interval ()[LEFT])
+                == (need_pure_heights_from_neighbors_[l + 1]
+                    ->spanned_rank_interval ()[LEFT])));
            l++)
         temp.push_back (need_pure_heights_from_neighbors_[l + 1]);
       need_pure_heights_from_neighbors.push_back (temp);
@@ -94,30 +108,42 @@ Pure_from_neighbor_engraver::finalize ()
     to the elements of need_pure_heights_from_neighbors_ on either side.
   */
 
-  int pos[2] = {-1, 0};
+  int pos[2] = { -1, 0};
   for (vsize i = 0; i < pure_relevants_.size (); i++)
     {
-      if (pos[1] < (int) need_pure_heights_from_neighbors.size ()
-          && (pure_relevants_[i]->spanned_rank_interval ()[LEFT]
-              > need_pure_heights_from_neighbors[pos[1]][0]->spanned_rank_interval ()[LEFT]))
+      while (pos[1] < (int) need_pure_heights_from_neighbors.size ()
+             && (pure_relevants_[i]->spanned_rank_interval ()[LEFT]
+                 > (need_pure_heights_from_neighbors[pos[1]][0]
+                    ->spanned_rank_interval ()[LEFT])))
         {
           pos[0] = pos[1];
           pos[1]++;
         }
       for (int j = 0; j < 2; j++)
-        if (pos[j] >= 0 && pos[j] < (int) need_pure_heights_from_neighbors.size ())
-          for (vsize k = 0; k < need_pure_heights_from_neighbors[pos[j]].size (); k++)
-            Pointer_group_interface::add_grob (need_pure_heights_from_neighbors[pos[j]][k], ly_symbol2scm ("neighbors"), pure_relevants_[i]);
+        if (pos[j] >= 0 && pos[j]
+            < (int) need_pure_heights_from_neighbors.size ())
+          for (vsize k = 0;
+               k < need_pure_heights_from_neighbors[pos[j]].size ();
+               k++)
+            if (!in_same_column (need_pure_heights_from_neighbors[pos[j]][k],
+                                 pure_relevants_[i]))
+              Pointer_group_interface::add_grob
+              (need_pure_heights_from_neighbors[pos[j]][k],
+               ly_symbol2scm ("neighbors"),
+               pure_relevants_[i]);
     }
 
   need_pure_heights_from_neighbors_.clear ();
   pure_relevants_.clear ();
 }
 
-#include "translator.icc"
+void
+Pure_from_neighbor_engraver::boot ()
+{
+  ADD_ACKNOWLEDGER (Pure_from_neighbor_engraver, item);
+  ADD_ACKNOWLEDGER (Pure_from_neighbor_engraver, pure_from_neighbor);
+}
 
-ADD_ACKNOWLEDGER (Pure_from_neighbor_engraver, item);
-ADD_ACKNOWLEDGER (Pure_from_neighbor_engraver, pure_from_neighbor);
 ADD_TRANSLATOR (Pure_from_neighbor_engraver,
                 /* doc */
                 "Coordinates items that get their pure heights from their neighbors.",