Fix some bugs in the dynamic engraver and PostScript backend

[lilypond.git] / lily / vertical-align-engraver.cc

diff --git a/lily/vertical-align-engraver.cc b/lily/vertical-align-engraver.cc
index 9614f5b359f0e87139798111a37f879472be2537..8b8d04ea0cb8cc6cbab90c8b81f11828bcfe9ac6 100644 (file)
--- a/lily/vertical-align-engraver.cc
+++ b/lily/vertical-align-engraver.cc
@@ -1,91 +1,139 @@
 /*
-  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--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
-#include "translator-group.hh"
-#include "axis-group-engraver.hh"
+
+#include "context.hh"
 #include "paper-column.hh"
-#include "vertical-align-engraver.hh"
-#include "axis-align-spanner.hh"
-#include "axis-group-spanner.hh"
+#include "align-interface.hh"
 #include "span-bar.hh"
+#include "axis-group-interface.hh"
+#include "engraver.hh"
+#include "spanner.hh"
+#include "pointer-group-interface.hh"
+#include "grob-array.hh"
+
+#include "translator.icc"
 
-Vertical_align_engraver::Vertical_align_engraver()
+class Vertical_align_engraver : public Engraver
+{
+  Spanner *valign_;
+  bool qualifies (Grob_info) const;
+  SCM id_to_group_hashtab_;
+
+public:
+  TRANSLATOR_DECLARATIONS (Vertical_align_engraver);
+  DECLARE_ACKNOWLEDGER (axis_group);
+
+protected:
+  virtual void derived_mark () const;
+  void process_music ();
+  virtual void finalize ();
+  virtual void initialize ();
+};
+
+ADD_ACKNOWLEDGER (Vertical_align_engraver, axis_group);
+ADD_TRANSLATOR (Vertical_align_engraver,
+               "Catch groups (staffs, lyrics lines, etc.) and stack "
+               "them vertically.",
+               /* create */ "VerticalAlignment",
+               /* accept */ "",
+               /* read */ "",
+               /* write */ "");
+
+Vertical_align_engraver::Vertical_align_engraver ()
 {
-  valign_p_ =0;
+  valign_ = 0;
+  id_to_group_hashtab_ = SCM_EOL;
 }
 
 void
-Vertical_align_engraver::do_creation_processing()
+Vertical_align_engraver::derived_mark () const
 {
-  valign_p_ =new Axis_align_spanner;
-  valign_p_->set_axis (Y_AXIS);
-  valign_p_->stacking_dir_ = DOWN;
-  
-  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", 0));
-  if (dist.length_i () && dist.isnum_b ())
-    {
-      valign_p_->threshold_interval_[BIGGER]  = Real (dist);
-    }
+  id_to_group_hashtab_ = scm_c_make_hash_table (11);
+}
 
-  dist = get_property ("minVerticalAlign", 0);
-  if (dist.length_i () && dist.isnum_b ())
+void
+Vertical_align_engraver::process_music ()
+{
+  if (!valign_)
     {
-      valign_p_->threshold_interval_[SMALLER]  = Real (dist);
+      valign_ = make_spanner ("VerticalAlignment", SCM_EOL);
+      valign_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
+      Align_interface::set_ordered (valign_);
     }
+}
 
-  dist = get_property ("alignmentReference",0);
-  if (dist.length_i () && dist.isnum_b ())
+void
+Vertical_align_engraver::finalize ()
+{
+  if (valign_)
     {
-      valign_p_->align_dir_ = (Direction)(int)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_b (Score_element_info i) const
+Vertical_align_engraver::qualifies (Grob_info i) const
 {
-#if 0
-  Translator * t =   i.origin_trans_l_arr_[0];
-#endif
-  int sz = i.origin_trans_l_arr_.size()  ;
-
-#if 0 
-  return (sz == 1 && dynamic_cast<Translator_group*> (t))
-    || (sz == 2 && dynamic_cast<Axis_group_engraver*> (t));
-#endif
-
-  Axis_group_element * elt = dynamic_cast<Axis_group_element *> (i.elem_l_);
+  int sz = i.origin_contexts ((Translator *)this).size ();
 
-  return sz > 1 && elt && elt->axes_[0] == Y_AXIS && !elt->parent_l (Y_AXIS);
+  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_axis_group (Grob_info i)
 {
-  if (qualifies_b (i))
+  if (qualifies (i))
     {
-      valign_p_->add_element (i.elem_l_);
+      string id = i.context ()->id_string ();
+
+      scm_hash_set_x (id_to_group_hashtab_, scm_makfrom0str (id.c_str ()),
+                     i.grob ()->self_scm ());
+
+      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);
+
+      Grob *before_grob = unsmob_grob (before);
+      Grob *after_grob = unsmob_grob (after);
+
+      Align_interface::add_element (valign_, i.grob ());
+       
+      if (before_grob || after_grob)
+       {
+         Grob_array *ga = unsmob_grob_array (valign_->get_object ("elements"));
+         vector<Grob*> &arr = ga->array_reference ();
+
+         Grob *added = arr.back ();
+         arr.pop_back ();
+         for (vsize i = 0; i < arr.size (); i++)
+           {
+             if (arr[i] == before_grob)
+               {
+                 arr.insert (arr.begin () + i, added);
+                 break;
+               }
+             else if (arr[i] == after_grob)
+               {
+                 arr.insert (arr.begin () + i + 1, added);
+                 break;
+               }
+           }
+       }
     }
-  else if (dynamic_cast<Span_bar*>(i.elem_l_) && i.origin_trans_l_arr_.size ())
-    {
-      i.elem_l_->add_dependency (valign_p_);
-    }  
 }
-
-
-
-ADD_THIS_TRANSLATOR(Vertical_align_engraver);