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

[lilypond.git] / lily / separation-item.cc

diff --git a/lily/separation-item.cc b/lily/separation-item.cc
index 6ff2928072541611bda6db49d7cb64626d8ab4c3..e29b8a912960454e099e1a89a5b367369c751c4d 100644 (file)
--- a/lily/separation-item.cc
+++ b/lily/separation-item.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1998--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1998--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -46,8 +46,8 @@ Separation_item::add_conditional_item (Grob *me, Grob *e)
 Real
 Separation_item::set_distance (Item *l, Item *r, Real padding)
 {
-  Drul_array<Skyline_pair *> lines (Skyline_pair::unsmob (l->get_property ("horizontal-skylines")),
-                                    Skyline_pair::unsmob (r->get_property ("horizontal-skylines")));
+  Drul_array<Skyline_pair *> lines (unsmob<Skyline_pair> (l->get_property ("horizontal-skylines")),
+                                    unsmob<Skyline_pair> (r->get_property ("horizontal-skylines")));
   Skyline right = conditional_skyline (r, l);
   right.merge ((*lines[RIGHT])[LEFT]);
 
@@ -68,7 +68,7 @@ Separation_item::set_distance (Item *l, Item *r, Real padding)
 bool
 Separation_item::is_empty (Grob *me)
 {
-  Skyline_pair *sky = Skyline_pair::unsmob (me->get_property ("horizontal-skylines"));
+  Skyline_pair *sky = unsmob<Skyline_pair> (me->get_property ("horizontal-skylines"));
   return (!sky || sky->is_empty ());
 }
 
@@ -87,7 +87,7 @@ MAKE_SCHEME_CALLBACK (Separation_item, calc_skylines, 1);
 SCM
 Separation_item::calc_skylines (SCM smob)
 {
-  Item *me = unsmob_item (smob);
+  Item *me = unsmob<Item> (smob);
   vector<Box> bs = boxes (me, 0);
   Skyline_pair sp (bs, Y_AXIS);
   /*
@@ -104,10 +104,13 @@ Separation_item::calc_skylines (SCM smob)
   return sp.smobbed_copy ();
 }
 
-/* if left is non-NULL, get the boxes corresponding to the
-   conditional-elements (conditioned on the grob LEFT). This
-   sounds more general than it is: conditional-elements are
-   always accidentals attached to a tied note.
+/*
+   If left is non-NULL, get the boxes corresponding to the
+   conditional-elements (conditioned on the grob LEFT).
+   Conditional elements are, for now, arpeggios and accidental
+   placements.  Based on the left grob, the accidentals will
+   be printed or not, so we filter using
+   Accidental_placement::get_relevant_accidentals.
 */
 vector<Box>
 Separation_item::boxes (Grob *me, Grob *left)
@@ -121,7 +124,19 @@ Separation_item::boxes (Grob *me, Grob *left)
   vector<Grob *> elts;
 
   if (left)
-    elts = Accidental_placement::get_relevant_accidentals (read_only_elts, left);
+    {
+      vector<Grob *> accidental_elts;
+      vector<Grob *> other_elts; // for now only arpeggios
+      for (vsize i = 0; i < read_only_elts.size (); i++)
+        {
+          if (has_interface<Accidental_placement> (read_only_elts[i]))
+            accidental_elts.push_back (read_only_elts[i]);
+          else
+            other_elts.push_back (read_only_elts[i]);
+        }
+      elts = Accidental_placement::get_relevant_accidentals (accidental_elts, left);
+      elts.insert (elts.end (), other_elts.begin (), other_elts.end ());
+    }
   else
     elts = read_only_elts;
 
@@ -138,11 +153,11 @@ Separation_item::boxes (Grob *me, Grob *left)
          bounds all of them). However, we can't exclude an axis-group that
          adds to its childrens' stencil. Currently, this is just TrillPitchGroup;
          hence the check for note-head-interface. */
-      if (Axis_group_interface::has_interface (il)
-          && !Note_head::has_interface (il))
+      if (has_interface<Axis_group_interface> (il)
+          && !has_interface<Note_head> (il))
         continue;
 
-      Interval y (il->pure_height (ycommon, 0, very_large));
+      Interval y (il->pure_y_extent (ycommon, 0, very_large));
       Interval x (il->extent (pc, X_AXIS));
 
       Interval extra_width = robust_scm2interval (elts[i]->get_property ("extra-spacing-width"),
@@ -150,10 +165,19 @@ Separation_item::boxes (Grob *me, Grob *left)
       Interval extra_height = robust_scm2interval (elts[i]->get_property ("extra-spacing-height"),
                                                    Interval (0.0, 0.0));
 
-      x[LEFT] += extra_width[LEFT];
-      x[RIGHT] += extra_width[RIGHT];
-      y[DOWN] += extra_height[DOWN];
-      y[UP] += extra_height[UP];
+      // The conventional empty extent is (+inf.0 . -inf.0)
+      //  but (-inf.0 . +inf.0) is used as extra-spacing-height
+      //  on items that must not overlap other note-columns.
+      // If these two uses of inf combine, leave the empty extent.
+
+      if (!isinf (x[LEFT]))
+        x[LEFT] += extra_width[LEFT];
+      if (!isinf (x[RIGHT]))
+        x[RIGHT] += extra_width[RIGHT];
+      if (!isinf (y[DOWN]))
+        y[DOWN] += extra_height[DOWN];
+      if (!isinf (y[UP]))
+        y[UP] += extra_height[UP];
 
       if (!x.is_empty () && !y.is_empty ())
         out.push_back (Box (x, y));
@@ -162,16 +186,24 @@ Separation_item::boxes (Grob *me, Grob *left)
   return out;
 }
 
-MAKE_SCHEME_CALLBACK (Separation_item, print, 1)
+MAKE_DOCUMENTED_SCHEME_CALLBACK (Separation_item, print, 1,
+                                 "Optional stencil for @code{PaperColumn} or"
+                                 "@code{NonMusicalPaperColumn}.\n"
+                                 "Draws the @code{horizontal-skylines} of each"
+                                 " @code{PaperColumn}, showing the shapes used"
+                                 " to determine the minimum distances between"
+                                 " @code{PaperColumns} at the note-spacing step,"
+                                 " before staves have been spaced (vertically)"
+                                 " on the page.")
 SCM
 Separation_item::print (SCM smob)
 {
   if (!debug_skylines)
     return SCM_BOOL_F;
 
-  Grob *me = unsmob_grob (smob);
+  Grob *me = unsmob<Grob> (smob);
   Stencil ret;
-  if (Skyline_pair *s = Skyline_pair::unsmob (me->get_property ("horizontal-skylines")))
+  if (Skyline_pair *s = unsmob<Skyline_pair> (me->get_property ("horizontal-skylines")))
     {
       ret.add_stencil (Lookup::points_to_line_stencil (0.1, (*s)[LEFT].to_points (Y_AXIS)).in_color (255, 255, 0));
       ret.add_stencil (Lookup::points_to_line_stencil (0.1, (*s)[RIGHT].to_points (Y_AXIS)).in_color (0, 255, 255));