Docs: warn about snippet-update usage

[lilypond.git] / lily / optimal-page-breaking.cc

diff --git a/lily/optimal-page-breaking.cc b/lily/optimal-page-breaking.cc
index 64a056aaba79aeade56a5f3b54db07e03ca9cb45..b45781fd0a7fc0b0c459a0a3acc1cdc6a9f7604e 100644 (file)
--- a/lily/optimal-page-breaking.cc
+++ b/lily/optimal-page-breaking.cc
@@ -63,9 +63,16 @@ Optimal_page_breaking::solve ()
   
       if (page_count > 1 && best.systems_per_page_[page_count - 2] > 1)
        min_sys_count -= best.systems_per_page_[page_count - 2];
+
+      min_sys_count = max (min_sys_count, (vsize)1);
     }
   else
-    best = space_systems_on_n_pages (0, page_count, first_page_num);
+    {
+      /* todo: the following line will spit out programming errors if the
+        ideal line spacing doesn't fit on PAGE_COUNT pages */
+      best = space_systems_on_n_pages (0, page_count, first_page_num);
+      min_sys_count = page_count;
+    }
 
   if (page_count == 1)
     message (_ ("Fitting music on 1 page..."));
@@ -86,7 +93,7 @@ Optimal_page_breaking::solve ()
          vsize min_p_count = min_page_count (i, first_page_num);
          Page_spacing_result cur;
 
-         if (min_p_count == page_count)
+         if (min_p_count == page_count || scm_is_integer (forced_page_count))
            cur = space_systems_on_n_pages (i, page_count, first_page_num);
          else
            cur = space_systems_on_n_or_one_more_pages (i, page_count-1, first_page_num);