New breve rest with ledger lines (issue4650052)

[bordage . bertrand]

Reviewers: ,

Message:
Minor patch that adds a useful glyph for baroque music.

Description:
New breve rest with ledger lines

Please review this at http://codereview.appspot.com/4650052/

Affected files:
  M lily/rest.cc
  M mf/feta-rests.mf


Index: lily/rest.cc
diff --git a/lily/rest.cc b/lily/rest.cc
index  
9b85523f80ae2840ad273f8b1626891ef8f7493c..dcc7bdc2e643f9f05f1036b8ae6de91de7347470  
100644
--- a/lily/rest.cc
+++ b/lily/rest.cc
@@ -80,7 +80,7 @@ string
 Rest::glyph_name (Grob *me, int balltype, string style, bool try_ledgers)
 {
   bool is_ledgered = false;
-  if (try_ledgers && (balltype == 0 || balltype == 1))
+  if (try_ledgers && (balltype == 0 || balltype == 1 || balltype == -1))
     {
       Real rad = Staff_symbol_referencer::staff_radius (me) * 2.0;
       Real pos = Staff_symbol_referencer::get_position (me);
@@ -92,6 +92,7 @@ Rest::glyph_name (Grob *me, int balltype, string style,  
bool try_ledgers)
       */
       is_ledgered |= (balltype == 0) && (pos >= +rad + 2 || pos < -rad);
       is_ledgered |= (balltype == 1) && (pos <= -rad - 2 || pos > +rad);
+      is_ledgered |= (balltype == -1) && (pos <= -rad - 3 || pos >= +rad +  
2);
     }

   string actual_style (style.c_str ());
Index: mf/feta-rests.mf
diff --git a/mf/feta-rests.mf b/mf/feta-rests.mf
index  
4f270801793997ead28f603db6703fc950eaf107..1e416d36d37f8b40a861dd72c39ef523afba3a95  
100644
--- a/mf/feta-rests.mf
+++ b/mf/feta-rests.mf
@@ -125,6 +125,24 @@ fet_beginchar ("breve rest", "M1");
        draw_staff (-2, 2, 0);
 fet_endchar;

+fet_beginchar ("breve rest (outside staff)", "M1o");
+       set_char_box (0, breve_rest_x#,
+                     ledgerlinethickness# / 2, breve_rest_y#);
+
+       draw_block ((0, 0), (breve_rest_x, breve_rest_y));
+
+       pickup pencircle scaled ledgerlinethickness;
+
+       y5 = y6 = breve_rest_y;
+       lft x5 = -b - breve_rest_y / 2;
+       rt x6 = w + breve_rest_y / 2;
+
+       draw_gridline (z5, z6, ledgerlinethickness_rounded);
+       draw_gridline ((x5, 0), (x6, 0), ledgerlinethickness_rounded);
+
+       draw_staff (-2, 2, 3);
+fet_endchar;
+

 fet_beginchar ("Quarter rest", "2");
        save alpha, yshift, height;