]> git.donarmstrong.com Git - lilypond.git/blobdiff - lily/paper-book.cc
Run grand-replace (issue 3765)
[lilypond.git] / lily / paper-book.cc
index 95be368234106029c178a74ed3ae152e9a6e6823..9035d355a2adea0535b9e873887535f1b7871efd 100644 (file)
@@ -1,14 +1,26 @@
 /*
-  paper-book.cc -- implement Paper_book
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 2004--2014 Jan Nieuwenhuizen <janneke@gnu.org>
 
-  (c) 2004--2007 Jan Nieuwenhuizen <janneke@gnu.org>
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "paper-book.hh"
 
 #include "grob.hh"
+#include "international.hh"
 #include "main.hh"
 #include "output-def.hh"
 #include "paper-column.hh"
@@ -27,10 +39,12 @@ Paper_book::Paper_book ()
   header_0_ = SCM_EOL;
   pages_ = SCM_BOOL_F;
   scores_ = SCM_EOL;
+  bookparts_ = SCM_EOL;
   performances_ = SCM_EOL;
   systems_ = SCM_BOOL_F;
 
   paper_ = 0;
+  parent_ = 0;
   smobify_self ();
 }
 
@@ -48,16 +62,19 @@ Paper_book::mark_smob (SCM smob)
   Paper_book *b = (Paper_book *) SCM_CELL_WORD_1 (smob);
   if (b->paper_)
     scm_gc_mark (b->paper_->self_scm ());
+  if (b->parent_)
+    scm_gc_mark (b->parent_->self_scm ());
   scm_gc_mark (b->header_);
   scm_gc_mark (b->header_0_);
   scm_gc_mark (b->pages_);
   scm_gc_mark (b->performances_);
   scm_gc_mark (b->scores_);
+  scm_gc_mark (b->bookparts_);
   return b->systems_;
 }
 
 int
-Paper_book::print_smob (SCM smob, SCM port, scm_print_state*)
+Paper_book::print_smob (SCM smob, SCM port, scm_print_state *)
 {
   Paper_book *b = (Paper_book *) SCM_CELL_WORD_1 (smob);
   (void)b;
@@ -65,6 +82,15 @@ Paper_book::print_smob (SCM smob, SCM port, scm_print_state*)
   return 1;
 }
 
+Output_def *
+Paper_book::top_paper ()
+{
+  Output_def *paper = paper_;
+  while (paper->parent_)
+    paper = paper->parent_;
+  return paper;
+}
+
 SCM
 dump_fields ()
 {
@@ -72,7 +98,7 @@ dump_fields ()
   for (vsize i = dump_header_fieldnames_global.size (); i--;)
     fields
       = scm_cons (ly_symbol2scm (dump_header_fieldnames_global[i].c_str ()),
-                 fields);
+                  fields);
   return fields;
 }
 
@@ -82,27 +108,85 @@ Paper_book::add_score (SCM s)
   scores_ = scm_cons (s, scores_);
 }
 
+void
+Paper_book::add_bookpart (SCM p)
+{
+  bookparts_ = scm_cons (p, bookparts_);
+}
+
 void
 Paper_book::add_performance (SCM s)
 {
   performances_ = scm_cons (s, performances_);
 }
 
-void
-Paper_book::output (SCM output_channel)
+long
+Paper_book::output_aux (SCM output_channel,
+                        bool is_last,
+                        long *first_page_number,
+                        long *first_performance_number)
 {
+  long page_nb = 0;
   if (scm_is_pair (performances_))
     {
       SCM proc = ly_lily_module_constant ("write-performances-midis");
-      scm_call_2 (proc, performances (), output_channel);
+
+      scm_call_3 (proc,
+                  performances (),
+                  output_channel,
+                  scm_from_long (*first_performance_number));
+      *first_performance_number += scm_ilength (performances_);
     }
 
-  if (scores_ == SCM_EOL)
-    return;
+  if (scm_is_pair (bookparts_))
+    {
+      for (SCM p = bookparts_; scm_is_pair (p); p = scm_cdr (p))
+        if (Paper_book *pbookpart = unsmob_paper_book (scm_car (p)))
+          {
+            bool is_last_part = (is_last && !scm_is_pair (scm_cdr (p)));
+            page_nb += pbookpart->output_aux (output_channel,
+                                              is_last_part,
+                                              first_page_number,
+                                              first_performance_number);
+          }
+    }
+  else
+    {
+      if (scores_ == SCM_EOL)
+        return 0;
+      paper_->set_variable (ly_symbol2scm ("first-page-number"),
+                            scm_from_long (*first_page_number));
+      paper_->set_variable (ly_symbol2scm ("is-last-bookpart"),
+                            ly_bool2scm (is_last));
+      /* Generate all stencils to trigger font loads.  */
+      page_nb = scm_ilength (pages ());
+      *first_page_number += page_nb;
+    }
+  return page_nb;
+}
 
-  /* Generate all stencils to trigger font loads.  */
-  pages ();
+void
+Paper_book::output (SCM output_channel)
+{
+  long first_page_number
+    = robust_scm2int (paper_->c_variable ("first-page-number"), 1);
+  long first_performance_number = 0;
+
+  /* FIXME: We need a line-width for ps output (framework-ps.scm:92).
+     If we don't have any, we take the paper-width unless we know
+     better which line-width to choose (e.g. if there are \bookparts
+     with different line-widths) and why we need it at all.
+  */
+
+  if (paper_->c_variable ("line-width") == SCM_UNDEFINED)
+    paper_->set_variable (ly_symbol2scm ("line-width"),
+                          paper_->c_variable ("paper-width"));
+
+  if (!output_aux (output_channel,
+                   true,
+                   &first_page_number,
+                   &first_performance_number))
+    return;
 
   SCM scopes = SCM_EOL;
   if (ly_is_module (header_))
@@ -114,40 +198,66 @@ Paper_book::output (SCM output_channel)
 
   if (get_program_option ("print-pages"))
     {
-      SCM func = scm_c_module_lookup (mod, "output-framework");
-
-      func = scm_variable_ref (func);
-      scm_apply_0 (func, scm_list_n (output_channel,
-                                    self_scm (),
-                                    scopes,
-                                    dump_fields (),
-                                    SCM_UNDEFINED));
+      SCM framework = ly_module_lookup (mod,
+                                        ly_symbol2scm ("output-framework"));
+
+      if (framework != SCM_BOOL_F)
+        {
+          SCM func = scm_variable_ref (framework);
+          scm_apply_0 (func, scm_list_n (output_channel,
+                                         self_scm (),
+                                         scopes,
+                                         dump_fields (),
+                                         SCM_UNDEFINED));
+        }
+      else
+        warning (_f ("program option -dprint-pages not supported by backend `%s'",
+                     get_output_backend_name ()));
     }
 
   if (get_program_option ("preview"))
     {
-      SCM func = scm_c_module_lookup (mod, "output-preview-framework");
-      func = scm_variable_ref (func);
-      scm_apply_0 (func, scm_list_n (output_channel,
-                                    self_scm (),
-                                    scopes,
-                                    dump_fields (),
-                                    SCM_UNDEFINED));
+      SCM framework
+        = ly_module_lookup (mod, ly_symbol2scm ("output-preview-framework"));
+
+      if (framework != SCM_BOOL_F)
+        {
+          SCM func = scm_variable_ref (framework);
+          scm_apply_0 (func, scm_list_n (output_channel,
+                                         self_scm (),
+                                         scopes,
+                                         dump_fields (),
+                                         SCM_UNDEFINED));
+        }
+      else
+        warning (_f ("program option -dpreview not supported by backend `%s'",
+                     get_output_backend_name ()));
     }
 }
 
 void
-Paper_book::classic_output (SCM output)
+Paper_book::classic_output_aux (SCM output,
+                                long *first_performance_number)
 {
   if (scm_is_pair (performances_))
     {
       SCM proc = ly_lily_module_constant ("write-performances-midis");
-      scm_call_2 (proc, performances (), output);
+      scm_call_3 (proc,
+                  performances (),
+                  output,
+                  scm_from_long (*first_performance_number));
+      *first_performance_number += scm_ilength (performances_);
     }
-  
+
   /* Generate all stencils to trigger font loads.  */
   systems ();
+}
+
+void
+Paper_book::classic_output (SCM output)
+{
+  long first_performance_number = 0;
+  classic_output_aux (output, &first_performance_number);
 
   SCM scopes = SCM_EOL;
   if (ly_is_module (header_))
@@ -164,10 +274,10 @@ Paper_book::classic_output (SCM output)
 
   func = scm_variable_ref (func);
   scm_apply_0 (func, scm_list_n (output,
-                                self_scm (),
-                                scopes,
-                                dump_fields (),
-                                SCM_UNDEFINED));
+                                 self_scm (),
+                                 scopes,
+                                 dump_fields (),
+                                 SCM_UNDEFINED));
 
   progress_indication ("\n");
 }
@@ -186,8 +296,8 @@ Paper_book::book_title ()
   SCM tit = SCM_EOL;
   if (ly_is_procedure (title_func))
     tit = scm_call_2 (title_func,
-                     paper_->self_scm (),
-                     scopes);
+                      paper_->self_scm (),
+                      scopes);
 
   if (unsmob_stencil (tit))
     title = *unsmob_stencil (tit);
@@ -215,8 +325,8 @@ Paper_book::score_title (SCM header)
   SCM tit = SCM_EOL;
   if (ly_is_procedure (title_func))
     tit = scm_call_2 (title_func,
-                     paper_->self_scm (),
-                     scopes);
+                      paper_->self_scm (),
+                      scopes);
 
   if (unsmob_stencil (tit))
     title = *unsmob_stencil (tit);
@@ -230,15 +340,15 @@ Paper_book::score_title (SCM header)
 void
 set_page_permission (SCM sys, SCM symbol, SCM permission)
 {
-  if (Paper_score *ps = dynamic_cast<Paper_score*> (unsmob_music_output (sys)))
+  if (Paper_score *ps = dynamic_cast<Paper_score *> (unsmob_music_output (sys)))
     {
-      vector<Grob*> cols = ps->get_columns ();
+      vector<Grob *> cols = ps->get_columns ();
       if (cols.size ())
-       {
-         Paper_column *col = dynamic_cast<Paper_column*> (cols.back ());
-         col->set_property (symbol, permission);
-         col->find_prebroken_piece (LEFT)->set_property (symbol, permission);
-       }
+        {
+          Paper_column *col = dynamic_cast<Paper_column *> (cols.back ());
+          col->set_property (symbol, permission);
+          col->find_prebroken_piece (LEFT)->set_property (symbol, permission);
+        }
     }
   else if (Prob *pb = unsmob_prob (sys))
     pb->set_property (symbol, permission);
@@ -255,19 +365,45 @@ set_system_penalty (SCM sys, SCM header)
     {
       SCM force = ly_module_lookup (header, ly_symbol2scm ("breakbefore"));
       if (SCM_VARIABLEP (force)
-         && scm_is_bool (SCM_VARIABLE_REF (force)))
-       {
-         if (to_boolean (SCM_VARIABLE_REF (force)))
-           {
-             set_page_permission (sys, ly_symbol2scm ("page-break-permission"),
-                                  ly_symbol2scm ("force"));
-             set_page_permission (sys, ly_symbol2scm ("line-break-permission"),
-                                  ly_symbol2scm ("force"));
-           }
-         else
-           set_page_permission (sys, ly_symbol2scm ("page-break-permission"), SCM_EOL);
-       }
+          && scm_is_bool (SCM_VARIABLE_REF (force)))
+        {
+          if (to_boolean (SCM_VARIABLE_REF (force)))
+            {
+              set_page_permission (sys, ly_symbol2scm ("page-break-permission"),
+                                   ly_symbol2scm ("force"));
+              set_page_permission (sys, ly_symbol2scm ("line-break-permission"),
+                                   ly_symbol2scm ("force"));
+            }
+          else
+            set_page_permission (sys, ly_symbol2scm ("page-break-permission"),
+                                 SCM_EOL);
+        }
+    }
+}
+
+void
+set_labels (SCM sys, SCM labels)
+{
+  if (Paper_score *ps = dynamic_cast<Paper_score *> (unsmob_music_output (sys)))
+    {
+      vector<Grob *> cols = ps->get_columns ();
+      if (cols.size ())
+        {
+          Paper_column *col = dynamic_cast<Paper_column *> (cols[0]);
+          col->set_property ("labels",
+                             scm_append_x (scm_list_2 (col->get_property ("labels"),
+                                                       labels)));
+          Paper_column *col_right
+            = dynamic_cast<Paper_column *> (col->find_prebroken_piece (RIGHT));
+          col_right->set_property ("labels",
+                                   scm_append_x (scm_list_2 (col_right->get_property ("labels"),
+                                                             labels)));
+        }
     }
+  else if (Prob *pb = unsmob_prob (sys))
+    pb->set_property ("labels",
+                      scm_append_x (scm_list_2 (pb->get_property ("labels"),
+                                                labels)));
 }
 
 SCM
@@ -279,10 +415,11 @@ Paper_book::get_score_title (SCM header)
   if (!title.is_empty ())
     {
       /*
-       TODO: this should come from the \layout {} block, which should
-       override settings from \paper {}
+        TODO: this should come from the \layout {} block, which should
+        override settings from \paper {}
       */
-      SCM props = paper_->lookup_variable (ly_symbol2scm ("score-title-properties"));
+      SCM props
+        = paper_->lookup_variable (ly_symbol2scm ("score-title-properties"));
       Prob *ps = make_paper_system (props);
       paper_system_set_stencil (ps, title);
 
@@ -292,16 +429,16 @@ Paper_book::get_score_title (SCM header)
   return SCM_BOOL_F;
 }
 
-
 SCM
 Paper_book::get_system_specs ()
 {
   SCM system_specs = SCM_EOL;
-  
+
   Stencil title = book_title ();
   if (!title.is_empty ())
     {
-      SCM props = paper_->lookup_variable (ly_symbol2scm ("book-title-properties"));
+      SCM props
+        = paper_->lookup_variable (ly_symbol2scm ("book-title-properties"));
       Prob *ps = make_paper_system (props);
       paper_system_set_stencil (ps, title);
 
@@ -311,71 +448,123 @@ Paper_book::get_system_specs ()
 
   SCM page_properties
     = scm_call_1 (ly_lily_module_constant ("layout-extract-page-properties"),
-                 paper_->self_scm ());
+                  paper_->self_scm ());
 
+  SCM interpret_markup_list = ly_lily_module_constant ("interpret-markup-list");
   SCM header = SCM_EOL;
+  SCM labels = SCM_EOL;
   for (SCM s = scm_reverse (scores_); scm_is_pair (s); s = scm_cdr (s))
     {
       if (ly_is_module (scm_car (s)))
-       {
-         header = scm_car (s);
-         if (header_0_ == SCM_EOL)
-           header_0_ = header;
-       }
+        {
+          header = scm_car (s);
+          if (header_0_ == SCM_EOL)
+            header_0_ = header;
+        }
       else if (Page_marker *page_marker = unsmob_page_marker (scm_car (s)))
-       {
-         /* a page marker: set previous element page break or turn permission */
-         if (scm_is_pair (system_specs))
-           set_page_permission (scm_car (system_specs),
-                                page_marker->permission_symbol (),
-                                page_marker->permission_value ());
-       }
+        {
+          /* page markers are used to set page breaking/turning permission,
+             or to place bookmarking labels */
+          if (scm_is_symbol (page_marker->permission_symbol ()))
+            {
+              /* set previous element page break or turn permission */
+              if (scm_is_pair (system_specs))
+                set_page_permission (scm_car (system_specs),
+                                     page_marker->permission_symbol (),
+                                     page_marker->permission_value ());
+            }
+          if (scm_is_symbol (page_marker->label ()))
+            {
+              /* The next element label is to be set */
+              labels = scm_cons (page_marker->label (), labels);
+            }
+        }
       else if (Music_output *mop = unsmob_music_output (scm_car (s)))
-       {
-         if (Paper_score *pscore = dynamic_cast<Paper_score *> (mop))
-           {
-             SCM title = get_score_title (header);
-
-             if (scm_is_pair (system_specs))
-               set_system_penalty (scm_car (system_specs), header);
-
-             if (unsmob_prob (title))
-               {
-                 system_specs = scm_cons (title, system_specs);
-                 unsmob_prob (title)->unprotect ();
-               }
-
-             header = SCM_EOL;
-             system_specs = scm_cons (pscore->self_scm (), system_specs);
-           }
-         else
-           {
-             /*
-               Ignore MIDI
-             */
-           }
-       }
-      else if (Text_interface::is_markup (scm_car (s)))
-       {
-         SCM t = Text_interface::interpret_markup (paper_->self_scm (),
-                                                   page_properties,
-                                                   scm_car (s));
-         
-         // TODO: init props
-         Prob *ps = make_paper_system (SCM_EOL);
-         ps->set_property ("page-break-permission", ly_symbol2scm ("allow"));
-         ps->set_property ("page-turn-permission", ly_symbol2scm ("allow"));
-         
-         paper_system_set_stencil (ps, *unsmob_stencil (t));
-         ps->set_property ("is-title", SCM_BOOL_T); 
-         system_specs = scm_cons (ps->self_scm (), system_specs);
-         ps->unprotect ();
-         
-         // FIXME: figure out penalty.
-         //set_system_penalty (ps, scores_[i].header_);
-       }
+        {
+          if (Paper_score *pscore = dynamic_cast<Paper_score *> (mop))
+            {
+              SCM title = get_score_title (header);
+
+              if (scm_is_pair (system_specs))
+                set_system_penalty (scm_car (system_specs), header);
+
+              if (unsmob_prob (title))
+                {
+                  system_specs = scm_cons (title, system_specs);
+                  unsmob_prob (title)->unprotect ();
+                }
+
+              header = SCM_EOL;
+              system_specs = scm_cons (pscore->self_scm (), system_specs);
+              if (scm_is_pair (labels))
+                {
+                  set_labels (scm_car (system_specs), labels);
+                  labels = SCM_EOL;
+                }
+            }
+          else
+            {
+              /*
+                Ignore MIDI
+              */
+            }
+        }
+      else if (Text_interface::is_markup_list (scm_car (s)))
+        {
+          SCM texts = scm_call_3 (interpret_markup_list,
+                                  paper_->self_scm (),
+                                  page_properties,
+                                  scm_car (s));
+          Prob *first = 0;
+          Prob *last = 0;
+          for (SCM list = texts; scm_is_pair (list); list = scm_cdr (list))
+            {
+              SCM t = scm_car (list);
+              // TODO: init props
+              Prob *ps = make_paper_system (SCM_EOL);
+              ps->set_property ("page-break-permission",
+                                ly_symbol2scm ("allow"));
+              ps->set_property ("page-turn-permission",
+                                ly_symbol2scm ("allow"));
+              ps->set_property ("last-markup-line", SCM_BOOL_F);
+              ps->set_property ("first-markup-line", SCM_BOOL_F);
+
+              paper_system_set_stencil (ps, *unsmob_stencil (t));
+
+              SCM footnotes = get_footnotes (unsmob_stencil (t)->expr ());
+              ps->set_property ("footnotes", footnotes);
+              ps->set_property ("is-title", SCM_BOOL_T);
+              if (list == texts)
+                first = ps;
+              else
+                {
+                  // last line so far, in a multi-line paragraph
+                  last = ps;
+                  //Place closely to previous line, no stretching.
+                  ps->set_property ("tight-spacing", SCM_BOOL_T);
+                }
+              system_specs = scm_cons (ps->self_scm (), system_specs);
+              ps->unprotect ();
+
+              if (scm_is_pair (labels))
+                {
+                  set_labels (scm_car (system_specs), labels);
+                  labels = SCM_EOL;
+                }
+              // FIXME: figure out penalty.
+              //set_system_penalty (ps, scores_[i].header_);
+            }
+          /* Set properties to avoid widowed/orphaned lines.
+             Single-line markup_lists are excluded, but in future
+             we may want to add the case of a very short, single line. */
+          if (first && last)
+            {
+              last->set_property ("last-markup-line", SCM_BOOL_T);
+              first->set_property ("first-markup-line", SCM_BOOL_T);
+            }
+        }
       else
-       assert (0);
+        assert (0);
     }
 
   system_specs = scm_reverse_x (system_specs, SCM_EOL);
@@ -389,46 +578,58 @@ Paper_book::systems ()
     return systems_;
 
   systems_ = SCM_EOL;
-  SCM specs = get_system_specs ();
-  for (SCM s = specs; scm_is_pair (s); s = scm_cdr (s))
+  if (scm_is_pair (bookparts_))
     {
-      if (Paper_score *pscore = dynamic_cast<Paper_score*> (unsmob_music_output (scm_car (s))))
-       {
-         SCM system_list = scm_vector_to_list (pscore->get_paper_systems ());
-         system_list = scm_reverse (system_list);
-         systems_ = scm_append (scm_list_2 (system_list, systems_));
-       }
-      else
-       {
-         systems_ = scm_cons (scm_car (s), systems_);
-       }
+      SCM system_list = SCM_EOL;
+      for (SCM p = bookparts_; scm_is_pair (p); p = scm_cdr (p))
+        if (Paper_book *pbookpart = unsmob_paper_book (scm_car (p)))
+          system_list = scm_cons (pbookpart->systems (), system_list);
+      systems_ = scm_append (scm_reverse_x (system_list, SCM_EOL));
     }
-  
-  systems_ = scm_reverse (systems_);
-
-  /* backwards compatibility for the old page breaker */
-  int i = 0;
-  Prob *last = 0;
-  for (SCM s = systems_; scm_is_pair (s); s = scm_cdr (s))
+  else
     {
-      Prob *ps = unsmob_prob (scm_car (s));
-      ps->set_property ("number", scm_from_int (++i));
-
-      if (last
-         && to_boolean (last->get_property ("is-title"))
-         && !scm_is_number (ps->get_property ("penalty")))
-       ps->set_property ("penalty", scm_from_int (10000));
-      last = ps;
-
-      if (scm_is_pair (scm_cdr (s)))
-       {
-         SCM perm = ps->get_property ("page-break-permission");
-         Prob *next = unsmob_prob (scm_cadr (s));
-         if (perm == SCM_EOL)
-           next->set_property ("penalty", scm_from_int (10001));
-         else if (perm == ly_symbol2scm ("force"))
-           next->set_property ("penalty", scm_from_int (-10001));
-       }
+      SCM specs = get_system_specs ();
+      for (SCM s = specs; scm_is_pair (s); s = scm_cdr (s))
+        {
+          if (Paper_score * pscore
+              = dynamic_cast<Paper_score *> (unsmob_music_output (scm_car (s))))
+            {
+              SCM system_list
+                = scm_vector_to_list (pscore->get_paper_systems ());
+
+              systems_ = scm_reverse_x (system_list, systems_);
+            }
+          else
+            {
+              systems_ = scm_cons (scm_car (s), systems_);
+            }
+        }
+      systems_ = scm_reverse_x (systems_, SCM_EOL);
+
+      /* backwards compatibility for the old page breaker */
+      int i = 0;
+      Prob *last = 0;
+      for (SCM s = systems_; scm_is_pair (s); s = scm_cdr (s))
+        {
+          Prob *ps = unsmob_prob (scm_car (s));
+          ps->set_property ("number", scm_from_int (++i));
+
+          if (last
+              && to_boolean (last->get_property ("is-title"))
+              && !scm_is_number (ps->get_property ("penalty")))
+            ps->set_property ("penalty", scm_from_int (10000));
+          last = ps;
+
+          if (scm_is_pair (scm_cdr (s)))
+            {
+              SCM perm = ps->get_property ("page-break-permission");
+              Prob *next = unsmob_prob (scm_cadr (s));
+              if (perm == SCM_EOL)
+                next->set_property ("penalty", scm_from_int (10001));
+              else if (perm == ly_symbol2scm ("force"))
+                next->set_property ("penalty", scm_from_int (-10001));
+            }
+        }
     }
 
   return systems_;
@@ -441,22 +642,41 @@ Paper_book::pages ()
     return pages_;
 
   pages_ = SCM_EOL;
-  SCM proc = paper_->c_variable ("page-breaking-wrapper");
-  pages_ = scm_apply_0 (proc, scm_list_1 (self_scm ()));
-
-  /* set systems_ from the pages */
-  if (systems_ == SCM_BOOL_F)
+  if (scm_is_pair (bookparts_))
     {
-      systems_ = SCM_EOL;
-      for (SCM p = pages_; scm_is_pair (p); p = scm_cdr (p))
-       {
-         Prob *page = unsmob_prob (scm_car (p));
-         SCM systems = page->get_property ("lines");
-
-         systems_ = scm_append (scm_list_2 (systems_, systems));
-       }
+      for (SCM p = bookparts_; scm_is_pair (p); p = scm_cdr (p))
+        if (Paper_book *pbookpart = unsmob_paper_book (scm_car (p)))
+          pages_ = scm_append_x (scm_list_2 (pages_, pbookpart->pages ()));
+    }
+  else if (scm_is_pair (scores_))
+    {
+      SCM page_breaking = paper_->c_variable ("page-breaking");
+      pages_ = scm_apply_0 (page_breaking, scm_list_1 (self_scm ()));
+
+      // Create all the page stencils.
+      SCM page_module = scm_c_resolve_module ("scm page");
+      SCM page_stencil = scm_c_module_lookup (page_module, "page-stencil");
+      page_stencil = scm_variable_ref (page_stencil);
+      for (SCM pages = pages_; scm_is_pair (pages); pages = scm_cdr (pages))
+        scm_apply_1 (page_stencil, scm_car (pages), SCM_EOL);
+
+      // Perform any user-supplied post-processing.
+      SCM post_process = paper_->c_variable ("page-post-process");
+      if (ly_is_procedure (post_process))
+        scm_apply_2 (post_process, paper_->self_scm (), pages_, SCM_EOL);
+
+      /* set systems_ from the pages */
+      if (systems_ == SCM_BOOL_F)
+        {
+          systems_ = SCM_EOL;
+          for (SCM p = pages_; scm_is_pair (p); p = scm_cdr (p))
+            {
+              Prob *page = unsmob_prob (scm_car (p));
+              SCM systems = page->get_property ("lines");
+              systems_ = scm_append (scm_list_2 (systems_, systems));
+            }
+        }
     }
-
   return pages_;
 }