release: 1.3.142

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

diff --git a/lily/break-align-engraver.cc b/lily/break-align-engraver.cc
index 44d94270a6028544137528c2e1774f5fe6ca33e6..a403c4a60ecd03fa8c5a1e7140795c8e87b77f23 100644 (file)
--- a/lily/break-align-engraver.cc
+++ b/lily/break-align-engraver.cc
@@ -3,47 +3,57 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1999--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 #include "engraver.hh"
 #include "protected-scm.hh"
 #include "break-align-item.hh"
-#include "axis-group-item.hh"
+#include "item.hh"
+#include "align-interface.hh"
+#include "axis-group-interface.hh"
+
 
 class Break_align_engraver : public Engraver
 {
-  Break_align_item *align_l_;
+  Item *align_l_;
   Protected_scm column_alist_;
 protected:
-  virtual void acknowledge_element(Score_element_info i);
-  virtual void do_pre_move_processing ();
+  virtual void finalize ();
+  virtual void acknowledge_grob (Grob_info i);
+  virtual void stop_translation_timestep ();
   void add_column (SCM);
   
 public:
-  VIRTUAL_COPY_CONS(Translator);
+  VIRTUAL_COPY_CONS (Translator);
   Break_align_engraver ();
 };
 
 
 
-ADD_THIS_TRANSLATOR(Break_align_engraver);
+ADD_THIS_TRANSLATOR (Break_align_engraver);
 
 void
 Break_align_engraver::add_column (SCM smob)
 {
-  Score_element * e = unsmob_element (smob);
-  align_l_->add_element (e);
-  typeset_element (e);
+  Grob * e = unsmob_grob (smob);
+  Break_align_interface::add_element (align_l_,e);
+  typeset_grob (e);
+}
+
+void
+Break_align_engraver::finalize ()
+{
+  column_alist_ = SCM_EOL;
 }
 
 void
-Break_align_engraver::do_pre_move_processing ()
+Break_align_engraver::stop_translation_timestep ()
 {
-  SCM order = get_property ("breakAlignOrder", 0);
+  SCM order = get_property ("breakAlignOrder");
   for (; gh_pair_p (order); order = gh_cdr (order))
     {
-      SCM p = scm_assoc ( gh_car (order), column_alist_);
+      SCM p = scm_assoc (gh_car (order), column_alist_);
       if (gh_pair_p (p))
        {
          add_column (gh_cdr (p));
@@ -62,7 +72,7 @@ Break_align_engraver::do_pre_move_processing ()
 
   if (align_l_)
     {
-      typeset_element (align_l_);
+      typeset_grob (align_l_);
       align_l_ = 0;
     }
 }
@@ -75,48 +85,73 @@ Break_align_engraver::Break_align_engraver ()
 }
 
 void
-Break_align_engraver::acknowledge_element (Score_element_info inf)
+Break_align_engraver::acknowledge_grob (Grob_info inf)
 {
   if (Item * item_l = dynamic_cast <Item *> (inf.elem_l_))
     {
       if (item_l->empty_b (X_AXIS) || item_l->parent_l (X_AXIS))
        return;
 
-      SCM bp=item_l->remove_elt_property ("breakable");
+      SCM bp=item_l->get_grob_property ("breakable");
       bool breakable = (to_boolean (bp));
       if (!breakable)
        return ;
 
-      SCM al = item_l->remove_elt_property ("break-aligned");
-      if (!gh_boolean_p (al ) || !gh_scm2bool (al))
+      SCM align_name = item_l->get_grob_property ("break-align-symbol");
+      if (!gh_symbol_p (align_name))
        return ;
 
-      
       if (!align_l_)
        {
-         align_l_ = new Break_align_item;
-         align_l_->set_elt_property ("breakable", SCM_BOOL_T);
-         announce_element (Score_element_info (align_l_,0));
+         align_l_ = new Item (get_property ("BreakAlignment"));
+         Break_align_interface::set_interface (align_l_);
+         announce_grob (align_l_,0);
+
+         SCM edge_sym = ly_symbol2scm ("Left_edge_item");
+         Item * edge = new Item (get_property ("LeftEdge"));
+
+        
+
+         /*
+           If the element is empty, it will be ignored in the break
+           alignment stuff.
+
+           TODO: switch off ignoring empty stuff?
+         */
+         edge->set_extent_callback (Grob::point_dimension_callback_proc, X_AXIS);
+         
+         /*
+           We must have left-edge in the middle.  Instrument-names
+           are left to left-edge, so they don't enter the staff.
+         */
+         align_l_->set_grob_property ("self-alignment-X", edge->self_scm ());
+         
+         announce_grob (edge, 0);
+         column_alist_ = scm_assoc_set_x (column_alist_, edge_sym, edge->self_scm ());
        }
 
-      SCM name = ly_str02scm (inf.elem_l_->name());
-      SCM s = scm_assoc (name, column_alist_);
+      SCM s = scm_assoc (align_name, column_alist_);
+
+      Item * group = 0;
 
-      Axis_group_item * group = 0;
       if (s != SCM_BOOL_F)
        {
-         Score_element *e =  unsmob_element (gh_cdr(s));
-         group = dynamic_cast<Axis_group_item*> (e);
+         Grob *e =  unsmob_grob (gh_cdr (s));
+         group = dynamic_cast<Item*> (e);
        }
       else
        {
-         group = new Axis_group_item;
-         group->set_axes (X_AXIS,X_AXIS);
-         group->set_elt_property ("origin", name);
+         group = new Item (get_property ("BreakAlignGroup"));
+
+         Axis_group_interface::set_interface (group);
+         Axis_group_interface::set_axes (group, X_AXIS,X_AXIS);
+
+         group->set_grob_property ("break-align-symbol", align_name);
          group->set_parent (align_l_, Y_AXIS);
-         announce_element (Score_element_info (group, 0));
-         column_alist_ = scm_assoc_set_x (column_alist_, name, group->self_scm_);
+         announce_grob (group, 0);
+         column_alist_ = scm_assoc_set_x (column_alist_, align_name, group->self_scm ());
+
        }
-      group->add_element (item_l);
+      Axis_group_interface::add_element (group, item_l);
     }
 }