* The grand 2005-2006 replace.

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

diff --git a/lily/separation-item.cc b/lily/separation-item.cc
index a50bea8d4f51af988151cbaa3ef1ae244998cf7b..37e4ef2ef0d7c04d90645ef6946c1aadada366e5 100644 (file)
--- a/lily/separation-item.cc
+++ b/lily/separation-item.cc
@@ -1,69 +1,154 @@
-/*   
-  single-malt-grouping-item.cc --  implement Separation_item
-  
+/*
+  separation-item.cc -- implement Separation_item
+
   source file of the GNU LilyPond music typesetter
-  
-  (c) 1998--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-  
- */
+
+  (c) 1998--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
 
 #include "separation-item.hh"
+
 #include "paper-column.hh"
-#include "debug.hh"
-#include "group-interface.hh"
+#include "warn.hh"
+#include "pointer-group-interface.hh"
+#include "accidental-placement.hh"
 
 void
-Separation_item::set_interface (Score_element*s)
+Separation_item::add_item (Grob *s, Item *i)
 {
-  s->set_extent_callback (0, X_AXIS);
-  s->set_extent_callback (0,  Y_AXIS);
+  assert (i);
+  Pointer_group_interface::add_grob (s, ly_symbol2scm ("elements"), i);
 }
 
 void
-Separation_item::add_item (Score_element*s,Item* i)
+Separation_item::add_conditional_item (Grob *me, Grob *e)
 {
-  assert (i);
-  Pointer_group_interface (s).add_element (i);
-  s->add_dependency (i);
+  Pointer_group_interface::add_grob (me, ly_symbol2scm ("conditional-elements"), e);
 }
 
+/*
+  Return the width of ME given that we are considering the object on
+  the LEFT.
+*/
 Interval
-Separation_item::my_width (Score_element *me)
+Separation_item::conditional_width (Grob *me, Grob *left)
 {
-  Item *item = dynamic_cast<Item*> (me);
-  Paper_column * pc = item->column_l ();
-  Interval w;
-  
-  for (SCM s =  me->get_elt_property ("elements"); gh_pair_p (s); s = gh_cdr (s))
-    {
-      SCM elt = gh_car (s);
-      if (!unsmob_element (elt))
-       continue;
+  Interval w = width (me);
+
+  Item *item = dynamic_cast<Item *> (me);
+  Paper_column *pc = item->get_column ();
 
-      Item *il = dynamic_cast<Item*> (unsmob_element (elt));
-      if (pc != il->column_l ())
+  extract_grob_set (me, "conditional-elements", elts);
+  for (int i = 0; i < elts.size (); i++)
+    {
+      Item *il = dynamic_cast<Item *> (elts[i]);
+      if (pc != il->get_column ())
        {
          /* this shouldn't happen, but let's continue anyway. */
-         programming_error (_("Separation_item:  I've been drinking too much"));
-         continue;             /*UGH UGH*/ 
+         programming_error ("Separation_item:  I've been drinking too much");
+         continue;             /*UGH UGH*/
        }
 
-      if (to_boolean (il->get_elt_property ("no-spacing-rods")))
-       {
-         continue;
-       }
+      if (to_boolean (il->get_property ("no-spacing-rods")))
+       continue;
 
-      Interval iv (il->extent (X_AXIS));
-      if (!iv.empty_b ())
+      if (Accidental_placement::has_interface (il))
+       w.unite (Accidental_placement::get_relevant_accidental_extent (il, pc, left));
+    }
+
+  SCM pad = me->get_property ("padding");
+
+  w.widen (robust_scm2double (pad, 0.0));
+  return w;
+}
+
+Interval
+Separation_item::width (Grob *me)
+{
+  SCM sw = me->get_property ("X-extent");
+  if (is_number_pair (sw))
+    return ly_scm2interval (sw);
+
+  Item *item = dynamic_cast<Item *> (me);
+  Paper_column *pc = item->get_column ();
+  Interval w;
+
+  extract_grob_set (me, "elements", elts);
+  for (int i = 0; i < elts.size (); i++)
+    {
+      Item *il = dynamic_cast<Item *> (elts[i]);
+      if (pc != il->get_column ())
        {
-         Real off = il->relative_coordinate (pc, X_AXIS);
-         w.unite  (iv + off);
+         /* this shouldn't happen, but let's continue anyway. */
+         programming_error ("Separation_item:  I've been drinking too much");
+         continue;             /*UGH UGH*/
        }
+
+      if (to_boolean (il->get_property ("no-spacing-rods")))
+       continue;
+
+      Interval iv (il->extent (pc, X_AXIS));
+      if (!iv.is_empty ())
+       w.unite (iv);
     }
 
+  SCM pad = me->get_property ("padding");
+
+  w.widen (robust_scm2double (pad, 0.0));
+
+  me->set_property ("X-extent", ly_interval2scm (w));
+
   return w;
- // add this->offset_ ? this-> relative_coordinate ()? 
 }
 
+Interval
+Separation_item::relative_width (Grob *me, Grob *common)
+{
+  Interval iv = width (me);
+
+  return dynamic_cast<Item *> (me)->get_column ()->relative_coordinate (common, X_AXIS) + iv;
+}
 
+/*
+  Try to find the break-aligned symbol in SEPARATION_ITEM that is
+  sticking out at direction D. The x size is put in LAST_EXT
+*/
+Grob *
+Separation_item::extremal_break_aligned_grob (Grob *me,
+                                             Direction d,
+                                             Interval *last_ext)
+{
+  Grob *col = dynamic_cast<Item *> (me)->get_column ();
+  last_ext->set_empty ();
+  Grob *last_grob = 0;
+
+  extract_grob_set (me, "elements", elts);
+  for (int i = elts.size (); i--;)
+    {
+      Grob *break_item = elts[i];
+      if (!scm_is_symbol (break_item->get_property ("break-align-symbol")))
+       continue;
+
+      if (!scm_is_pair (break_item->get_property ("space-alist")))
+       continue;
+
+      Interval ext = break_item->extent (col, X_AXIS);
+
+      if (ext.is_empty ())
+       continue;
+
+      if (!last_grob
+         || (last_grob && d * (ext[d]- (*last_ext)[d]) > 0))
+       {
+         *last_ext = ext;
+         last_grob = break_item;
+       }
+    }
+
+  return last_grob;
+}
 
+ADD_INTERFACE (Separation_item, "separation-item-interface",
+              "Item that computes widths to generate spacing rods. "
+              "This is done in concert with @ref{separation-spanner-interface}.",
+              "padding X-extent conditional-elements elements");