* lily/hairpin.cc: lengthen hairpin if space is available.

[lilypond.git] / lily / hairpin.cc

diff --git a/lily/hairpin.cc b/lily/hairpin.cc
index f1c715d60276241679f47f02c6dfb15d0c568309..828bb6ec52b11694f23826e98391146d40bc2138 100644 (file)
--- a/lily/hairpin.cc
+++ b/lily/hairpin.cc
@@ -3,30 +3,31 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
-#include "molecule.hh"
+#include "staff-symbol-referencer.hh"
+#include "stencil.hh"
+#include "line-interface.hh"
 #include "hairpin.hh"
 #include "spanner.hh"
 #include "font-interface.hh"
 #include "dimensions.hh"
-#include "paper-def.hh"
-#include "debug.hh"
+#include "output-def.hh"
+#include "warn.hh"
 #include "paper-column.hh"
+#include "lookup.hh"
 
-MAKE_SCHEME_CALLBACK (Hairpin, brew_molecule, 1);
+MAKE_SCHEME_CALLBACK (Hairpin, print, 1);
 
 SCM
-Hairpin::brew_molecule (SCM smob) 
+Hairpin::print (SCM smob) 
 {
   Grob *me= unsmob_grob (smob);
   Spanner *spanner = dynamic_cast<Spanner*> (me);
 
-  Real line = me->paper_l ()->get_var ("stafflinethickness");  
-  
-  SCM s = me->get_grob_property ("grow-direction");
-  if (!ly_dir_p (s))
+  SCM s = me->get_property ("grow-direction");
+  if (!is_direction (s))
     {
       me->suicide ();
       return SCM_EOL;
@@ -34,16 +35,14 @@ Hairpin::brew_molecule (SCM smob)
   
   Direction grow_dir = to_dir (s);
 
-
-  /* Ugh, must be same as Text_spanner::brew_molecule.  */  
-  Real padding = gh_scm2double (me->get_grob_property ("if-text-padding"));
+  Real padding = scm_to_double (me->get_property ("bound-padding"));
  
   Drul_array<bool> broken;
   Drul_array<Item*> bounds ;
   Direction d = LEFT;
   do
     {
-      bounds[d] =spanner->get_bound (d);
+      bounds[d] = spanner->get_bound (d);
       broken[d] = bounds[d]->break_status_dir () != CENTER;
     }
   while (flip (&d) != LEFT);
@@ -54,7 +53,7 @@ Hairpin::brew_molecule (SCM smob)
   do
     {
       Item *b = bounds[d];
-      x_points[d]  = b->relative_coordinate (common, X_AXIS);
+      x_points[d] = b->relative_coordinate (common, X_AXIS);
       if (broken [d])
        {
          if (d == LEFT)
@@ -64,21 +63,36 @@ Hairpin::brew_molecule (SCM smob)
        {
          if (dynamic_cast<Paper_column*> (b))
            {
+             bool neighbor_found = false;
+             for (SCM  adj = me->get_property ("adjacent-hairpins");
+                  ly_c_pair_p (adj); adj = ly_cdr (adj))
+               {
+                 /*
+                  FIXME: this will fuck up in case of polyphonic
+                  notes in other voices. Need to look at note-columns
+                  in the current staff/voice.
+                 */
+                 
+                 Spanner *pin = unsmob_spanner (ly_car (adj));
+                 if (pin
+                     && (pin->get_bound (LEFT)->get_column() == b
+                         || pin->get_bound (RIGHT)->get_column() == b))
+                   neighbor_found = true; 
+               }
+             
              /*
                If we're hung on a paper column, that means we're not
                adjacent to a text-dynamic, and we may move closer. We
                make the padding a little smaller, here.
              */
-             Interval e =b->extent (common, X_AXIS);
-             if (e.empty_b ())
-               e = Interval (0,0) + b->relative_coordinate (common, X_AXIS);
-             
-             x_points[d] = e.center () - d  * padding /3; // ugh.
+             Interval e = robust_relative_extent (b, common, X_AXIS);
+             x_points[d] =
+               neighbor_found ? e.center() - d * padding / 3 : e[d];
            }
          else
            {
-             Interval e =b->extent (common, X_AXIS);
-             if (!e.empty_b ())
+             Interval e = b->extent (common, X_AXIS);
+             if (!e.is_empty ())
                x_points[d] = e[-d] - d*padding;
            }
        }
@@ -96,8 +110,8 @@ Hairpin::brew_molecule (SCM smob)
     }
 
   bool continued = broken[Direction (-grow_dir)];
-  Real height = gh_scm2double (me->get_grob_property ("height"));
-  Real thick = line * gh_scm2double (me->get_grob_property ("thickness"));
+  Real height = robust_scm2double (me->get_property ("height"), 0.2) *
+    Staff_symbol_referencer::staff_space (me);
 
   Real starth, endh;
   if (grow_dir < 0)
@@ -110,41 +124,26 @@ Hairpin::brew_molecule (SCM smob)
       starth = continued ? height/2 : 0.0;
       endh = height;
     }
-  
-  /*
-    TODO: junk this and, make a general
-
-    Lookup::line  (XY1, XY2).
-  */
-  SCM hairpin = scm_list_n (ly_symbol2scm ("hairpin"),
-                        gh_double2scm (thick),
-                        gh_double2scm (width),
-                        gh_double2scm (starth),
-                        gh_double2scm (endh),
-                        SCM_UNDEFINED);
 
   /*
-    We make the hairpin too large in Y direction, so it stays at
-    proper distance from the staff.
+    should do relative to staff-symbol staff-space?
   */
-  Interval yext = 2* height  * Interval (-1,1);
-  Box b (Interval (0, width), yext);
-  Molecule mol (b, hairpin);
-  
+
+  Stencil mol;
+  mol  = Line_interface::line (me, Offset (0, starth), Offset (width, endh));
+  mol.add_stencil (Line_interface::line (me,
+                                        Offset (0, -starth),
+                                        Offset (width, -endh)));
+
   mol.translate_axis (x_points[LEFT]
                      - bounds[LEFT]->relative_coordinate (common, X_AXIS),
                      X_AXIS);
-
   return mol.smobbed_copy ();
 }
 
 
 
 ADD_INTERFACE (Hairpin, "hairpin-interface",
-  "hairpin crescendo.
-
-padding -- horizontal padding. This is useful if a crescendo is set next to a text like `mf'
-
-",
-  "grow-direction thickness height padding");
+  "A hairpin (de)crescendo.",
+  "grow-direction height bound-padding adjacent-hairpins");