X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fvertical-align-engraver.cc;h=7b0b9900f69ab5808d0aebc08c8a2558ad1f83a1;hb=0fcd8c283c45644a92d2308f1cd0d82a1e63380b;hp=2f56e3b7b3e013f9f3d07dba16b87f0a03e0acb0;hpb=1cf3d59c1559fb9774c4c1c8cae155cfe54a927c;p=lilypond.git

diff --git a/lily/vertical-align-engraver.cc b/lily/vertical-align-engraver.cc
index 2f56e3b7b3..7b0b9900f6 100644
--- a/lily/vertical-align-engraver.cc
+++ b/lily/vertical-align-engraver.cc
@@ -1,62 +1,140 @@
 /*
-  vertical-align-grav.cc -- implement Vertical_align_engraver
+  vertical-align-engraver.cc -- implement Vertical_align_engraver
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
-#include "p-col.hh"
-#include "vertical-align-engraver.hh"
-#include "vertical-align-spanner.hh"
-#include "vertical-group-spanner.hh"
+#include "context.hh"
+#include "paper-column.hh"
+#include "align-interface.hh"
+#include "span-bar.hh"
+#include "axis-group-interface.hh"
+#include "engraver.hh"
+#include "spanner.hh"
 
-Vertical_align_engraver::Vertical_align_engraver()
+class Vertical_align_engraver : public Engraver
 {
-  valign_p_ =0;
+  Spanner *valign_;
+  bool qualifies (Grob_info) const;
+  SCM id_to_group_hashtab_;  
+  
+public:
+  TRANSLATOR_DECLARATIONS (Vertical_align_engraver);
+
+protected:
+  virtual void derived_mark () const;
+  virtual void acknowledge_grob (Grob_info);
+  virtual void process_music ();
+  virtual void finalize ();
+  virtual void initialize ();
+};
+
+
+ADD_TRANSLATOR (Vertical_align_engraver,
+		"Catch groups (staffs, lyrics lines, etc.) and stack "
+		"them vertically.",
+		/* creats*/ "VerticalAlignment",
+		/* accepts */ "",
+		/* acks  */ "axis-group-interface",
+		/* reads */ "",
+		/* write */ "");
+
+
+Vertical_align_engraver::Vertical_align_engraver ()
+{
+  valign_ = 0;
+  id_to_group_hashtab_ = SCM_EOL;
 }
 
 void
-Vertical_align_engraver::do_creation_processing()
+Vertical_align_engraver::derived_mark () const
 {
-  valign_p_ =new Vertical_align_spanner;
-  valign_p_->set_bounds(LEFT,get_staff_info().command_pcol_l ());
-  announce_element (Score_element_info (valign_p_ , 0));
+  scm_gc_mark (id_to_group_hashtab_); 
 }
 
 void
-Vertical_align_engraver::do_removal_processing()
+Vertical_align_engraver::initialize ()
 {
-  Scalar dist (get_property ("maxVerticalAlign"));
-  if (dist.length_i () && dist.isnum_b ())
+  id_to_group_hashtab_ = scm_c_make_hash_table (11);
+}
+
+
+void
+Vertical_align_engraver::process_music ()
+{
+  if (!valign_)
     {
-      valign_p_->threshold_interval_[BIGGER]  = Real (dist);
+      valign_ = make_spanner ("VerticalAlignment", SCM_EOL);
+      valign_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
     }
+}
 
-  dist = get_property ("minVerticalAlign");
-  if (dist.length_i () && dist.isnum_b ())
+void
+Vertical_align_engraver::finalize ()
+{
+  if (valign_)
     {
-      valign_p_->threshold_interval_[SMALLER]  = Real (dist);
+      valign_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+      valign_ = 0;
     }
-  
-  valign_p_->set_bounds(RIGHT,get_staff_info().command_pcol_l ());
-  typeset_element (valign_p_);
-  valign_p_ =0;
+}
+
+bool
+Vertical_align_engraver::qualifies (Grob_info i) const
+{
+  int sz = i.origin_contexts ((Translator *)this).size ();
+
+  return sz > 0 && Axis_group_interface::has_interface (i.grob ())
+    && !i.grob ()->get_parent (Y_AXIS) && Axis_group_interface::has_axis (i.grob (), Y_AXIS);
 }
 
 void
-Vertical_align_engraver::acknowledge_element (Score_element_info i)
+Vertical_align_engraver::acknowledge_grob (Grob_info i)
 {
-  if (i.origin_grav_l_arr_.size() == 1 && 
-      i.elem_l_->is_type_b (Vertical_group_spanner::static_name()) &&
-      !i.elem_l_->axis_group_l_a_[Y_AXIS]) 
+  if (qualifies (i))
     {
-      assert (!valign_p_->contains_b (i.elem_l_));
+      String id = i.context ()->id_string ();
+
+      scm_hash_set_x (id_to_group_hashtab_, scm_makfrom0str (id.to_str0 ()),
+		      i.grob ()->self_scm ());
 
-      valign_p_->add_element (i.elem_l_);
-    }
-}
 
+      SCM before_id = i.context ()->get_property ("alignAboveContext");
+      SCM after_id = i.context ()->get_property ("alignBelowContext");
+      
+      SCM before = scm_hash_ref (id_to_group_hashtab_,  before_id, SCM_BOOL_F);
+      SCM after = scm_hash_ref (id_to_group_hashtab_,  after_id, SCM_BOOL_F);
 
-IMPLEMENT_IS_TYPE_B1(Vertical_align_engraver, Engraver);
-ADD_THIS_TRANSLATOR(Vertical_align_engraver);
+
+      Align_interface::add_element (valign_, i.grob (),
+				    get_property ("verticalAlignmentChildCallback"));
+
+      if (unsmob_grob (before) || unsmob_grob (after))
+	{
+	  SCM elts = valign_->get_property ("elements");
+	  SCM new_order = scm_cdr (elts);
+	  SCM *current = &new_order;
+
+	  for (SCM s = new_order;  scm_is_pair (s); s = scm_cdr (s))
+	    {
+	      if (scm_car (s) == after)
+		{
+		  *current = scm_cons (i.grob ()->self_scm(), s);
+		  break;
+		}
+	      else if (scm_car (s) == before)
+		{
+		  scm_set_cdr_x (s, scm_cons (i.grob ()->self_scm (),
+					      scm_cdr (s)));
+		  break;
+		}
+
+	      current = SCM_CDRLOC (s);
+	    }
+
+	  valign_->set_property ("elements", new_order);
+	}
+    }
+}