(transform_heads): replace

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

diff --git a/lily/break-align-engraver.cc b/lily/break-align-engraver.cc
index a797a291550c3997709c19fc46184dec2d7d9e5e..474294252971b22fdbc80a54df32354d28ea2516 100644 (file)
--- a/lily/break-align-engraver.cc
+++ b/lily/break-align-engraver.cc
@@ -3,32 +3,32 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 1999--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1999--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 #include "engraver.hh"
 #include "protected-scm.hh"
 #include "break-align-interface.hh"
-#include "item.hh"
 #include "align-interface.hh"
 #include "axis-group-interface.hh"
-
+#include "context.hh"
+#include "translator-group.hh"
 
 class Break_align_engraver : public Engraver
 {
   Item *align_;
-  Protected_scm column_alist_;
-  Item *edge_;
+  SCM column_alist_;
+  Item *left_edge_;
 
   void add_to_group (SCM,Item*);
 protected:
-  virtual void finalize ();
   virtual void acknowledge_grob (Grob_info i);
   virtual void stop_translation_timestep ();
+  virtual void derived_mark () const;
   void add_column (SCM);
   
 public:
-  TRANSLATOR_DECLARATIONS(Break_align_engraver);
+  TRANSLATOR_DECLARATIONS (Break_align_engraver);
 };
 
 void
@@ -36,58 +36,37 @@ Break_align_engraver::add_column (SCM smob)
 {
   Grob * e = unsmob_grob (smob);
   Break_align_interface::add_element (align_,e);
-  typeset_grob (e);
-}
-
-void
-Break_align_engraver::finalize ()
-{
-  column_alist_ = SCM_EOL;
+  
 }
 
 void
 Break_align_engraver::stop_translation_timestep ()
 {
-  SCM order = get_property ("breakAlignOrder");
-  for (; gh_pair_p (order); order = ly_cdr (order))
+  for (SCM p = column_alist_; scm_is_pair (p); p = scm_cdr (p))
     {
-      SCM p = scm_assoc (ly_car (order), column_alist_);
-      if (gh_pair_p (p))
-       {
-         add_column (ly_cdr (p));
-         column_alist_ = scm_assoc_remove_x (column_alist_, ly_car (order));
-       }
-    }
-
-  for (SCM p = column_alist_; gh_pair_p (p); p = ly_cdr (p))
-    {
-      SCM pair = ly_car (p);
-      add_column (ly_cdr (pair));
+      SCM pair = scm_car (p);
+      add_column (scm_cdr (pair));
     }
-
-  
   column_alist_ = SCM_EOL;
 
-  if (align_)
-    {
-      typeset_grob (align_);
-      align_ = 0;
-    }
-  if (edge_)
-    {
-      typeset_grob (edge_);
-      edge_ = 0;
-    }
+  align_ = 0;
+  left_edge_ = 0;
 }
 
 
 Break_align_engraver::Break_align_engraver ()
 {
   column_alist_ = SCM_EOL;
-  edge_ = 0;
+  left_edge_ = 0;
   align_ = 0;
 }
 
+void
+Break_align_engraver::derived_mark () const
+{
+  scm_gc_mark (column_alist_);
+}
+
 void
 Break_align_engraver::acknowledge_grob (Grob_info inf)
 {
@@ -99,24 +78,26 @@ Break_align_engraver::acknowledge_grob (Grob_info inf)
       if (item->get_parent (X_AXIS))
        return;
 
-      SCM bp=item->get_grob_property ("breakable");
+      SCM bp = item->get_property ("breakable");
       bool breakable = (to_boolean (bp));
       if (!breakable)
        return ;
 
-      SCM align_name = item->get_grob_property ("break-align-symbol");
-      if (!gh_symbol_p (align_name))
+      SCM align_name = item->get_property ("break-align-symbol");
+      if (!scm_is_symbol (align_name))
        return ;
 
       if (!align_)
        {
-         align_ = new Item (get_property ("BreakAlignment"));
-
-         announce_grob (align_, SCM_EOL);
-
-         edge_ = new Item (get_property ("LeftEdge"));
-         add_to_group (edge_->get_grob_property ("break-align-symbol"), edge_);
-         announce_grob(edge_, SCM_EOL);
+         align_ = make_item ("BreakAlignment", SCM_EOL);
+
+         Context*origin = inf.origin_contexts (this)[0];
+         left_edge_ = make_item_from_properties (dynamic_cast<Engraver*> (origin->implementation ()),
+                                                 ly_symbol2scm ("LeftEdge"),
+                                                 SCM_EOL,
+                                                 "LeftEdge");
+         add_to_group (left_edge_->get_property ("break-align-symbol"),
+                       left_edge_);
        }
       
       add_to_group (align_name, item);
@@ -124,23 +105,22 @@ Break_align_engraver::acknowledge_grob (Grob_info inf)
 }
 
 void
-Break_align_engraver::add_to_group(SCM align_name, Item*item)
+Break_align_engraver::add_to_group (SCM align_name, Item*item)
 {
   SCM s = scm_assoc (align_name, column_alist_);
   Item * group = 0;
 
   if (s != SCM_BOOL_F)
     {
-      Grob *e =  unsmob_grob (ly_cdr (s));
+      Grob *e =  unsmob_grob (scm_cdr (s));
       group = dynamic_cast<Item*> (e);
     }
   else
     {
-      group = new Item (get_property ("BreakAlignGroup"));
+      group = make_item ("BreakAlignGroup", item->self_scm () );
 
-      group->set_grob_property ("break-align-symbol", align_name);
+      group->set_property ("break-align-symbol", align_name);
       group->set_parent (align_, Y_AXIS);
-      announce_grob(group, item->self_scm());
          
       column_alist_ = scm_assoc_set_x (column_alist_, align_name, group->self_scm ());
 
@@ -148,10 +128,13 @@ Break_align_engraver::add_to_group(SCM align_name, Item*item)
   Axis_group_interface::add_element (group, item);
 }
 
-ENTER_DESCRIPTION(Break_align_engraver,
-/* descr */       "Align grobs with corresponding break-align-symbols into groups, and order the groups according to breakAlignOrder",
-/* creats*/       "BreakAlignment BreakAlignGroup LeftEdge",
-/* accepts */     "",
-/* acks  */       "break-aligned-interface"
-,/* reads */       "breakAlignOrder",
-/* write */       "");
+ADD_TRANSLATOR (Break_align_engraver,
+                  "Align grobs with corresponding @code{break-align-symbols} into "
+                  "groups, and order the groups according to @code{breakAlignOrder}. "
+                  "The left edge of the alignment gets a separate group, with a symbol @code{left-edge}. "
+                  ,
+                  /* creats*/       "BreakAlignment BreakAlignGroup LeftEdge",
+                  /* accepts */     "",
+                  /* acks  */       "break-aligned-interface",
+                  /* reads */       "",
+                  /* write */       "");