(Multi_measure_rest_engraver): init bar_seen_ to true. Notice

[lilypond.git] / lily / stencil.cc

diff --git a/lily/stencil.cc b/lily/stencil.cc
index 5f0e04f3a8b7b20842b4c78d26ceb00562305599..3ebd5b28864f99d2d8a041e441c98fee80aa1ef8 100644 (file)
--- a/lily/stencil.cc
+++ b/lily/stencil.cc
@@ -3,17 +3,18 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
+#include "stencil.hh"
+
 #include <math.h>
-#include <libc-extension.hh>   // isinf
 
-#include "font-metric.hh" 
 #include "dimensions.hh"
-#include "interval.hh"
-#include "string.hh"
-#include "stencil.hh"
+#include "font-metric.hh"
+#include "input-smob.hh"
+#include "libc-extension.hh"   // isinf
+#include "string-convert.hh"
 #include "warn.hh"
 
 #include "ly-smobs.icc"
@@ -41,7 +42,7 @@ Stencil::print_smob (SCM, SCM port, scm_print_state *)
 SCM
 Stencil::mark_smob (SCM smob)
 {
-  Stencil *s = (Stencil*) ly_cdr (smob);
+  Stencil *s = (Stencil *) SCM_CELL_WORD_1 (smob);
   return s->expr_;
 }
 
@@ -86,11 +87,16 @@ Stencil::translate (Offset o)
   Axis a = X_AXIS;
   while (a < NO_AXES)
     {
-      if (abs (o[a]) > 100 CM
-         || isinf (o[a]) || isnan (o[a]))
+      if (isinf (o[a])
+         || isnan (o[a])
+
+         // ugh, hardcoded. 
+         || fabs (o[a]) > 1e6) 
        {
-         programming_error ("Improbable offset for translation: setting to zero");
-         o[a] =  0.0;
+         programming_error (String_convert::form_string ("Improbable offset for stencil: %f staff space", o[a])
+                            + "\n"
+                            + "Setting to zero.");
+         o[a] = 0.0;
        }
       incr (a);
     }
@@ -102,11 +108,11 @@ Stencil::translate (Offset o)
     dim_.translate (o);
   origin_ += o;
 }
-  
+
 void
 Stencil::translate_axis (Real x, Axis a)
 {
-  Offset o (0,0);
+  Offset o (0, 0);
   o[a] = x;
   translate (o);
 }
@@ -128,8 +134,8 @@ Stencil::set_empty (bool e)
     }
   else
     {
-      dim_[X_AXIS] = Interval (0,0);
-      dim_[Y_AXIS] = Interval (0,0);
+      dim_[X_AXIS] = Interval (0, 0);
+      dim_[Y_AXIS] = Interval (0, 0);
     }
 }
 
@@ -137,7 +143,7 @@ void
 Stencil::align_to (Axis a, Real x)
 {
   if (is_empty ())
-    return ;
+    return;
 
   Interval i (extent (a));
   translate_axis (-i.linear_combination (x), a);
@@ -158,6 +164,7 @@ Stencil::moved_to_edge (Axis a, Direction d, Stencil const &s,
     {
       programming_error ("Stencil::moved_to_edge: adding empty stencil.");
       his_extent = 0.0;
+      //      SCM_ASSERT_TYPE (0, s.expr (), SCM_ARG1, __FUNCTION__, "non-empty stencil");
     }
   else
     his_extent = i[-d];
@@ -166,11 +173,11 @@ Stencil::moved_to_edge (Axis a, Direction d, Stencil const &s,
     + d * padding;
 
   Stencil toadd (s);
-  toadd.translate_axis (offset,a);
+  toadd.translate_axis (offset, a);
 
   if (minimum > 0 && d * (-origin ()[a] + toadd.origin ()[a]) < minimum)
-    toadd.translate_axis ( -toadd.origin ()[a]
-                          + origin ()[a] + d * minimum, a);
+    toadd.translate_axis (-toadd.origin ()[a]
+                         + origin ()[a] + d * minimum, a);
 
   return toadd;
 }
@@ -182,3 +189,104 @@ Stencil::add_at_edge (Axis a, Direction d, Stencil const &s, Real padding,
 {
   add_stencil (moved_to_edge (a, d, s, padding, minimum));
 }
+
+/****************************************************************/
+
+void
+interpret_stencil_expression (SCM expr,
+                             void (*func) (void *, SCM),
+                             void *func_arg,
+                             Offset o)
+{
+  while (1)
+    {
+      if (!scm_is_pair (expr))
+       return;
+
+      SCM head = scm_car (expr);
+
+      if (head == ly_symbol2scm ("translate-stencil"))
+       {
+         o += ly_scm2offset (scm_cadr (expr));
+         expr = scm_caddr (expr);
+       }
+      else if (head == ly_symbol2scm ("combine-stencil"))
+       {
+         for (SCM x = scm_cdr (expr); scm_is_pair (x); x = scm_cdr (x))
+           interpret_stencil_expression (scm_car (x), func, func_arg, o);
+         return;
+       }
+      else if (head == ly_symbol2scm ("grob-cause"))
+       {
+         SCM grob = scm_cadr (expr);
+
+         (*func) (func_arg, scm_list_3 (head,
+                                        ly_quote_scm (ly_offset2scm (o)), grob));
+         interpret_stencil_expression (scm_caddr (expr), func, func_arg, o);
+         (*func) (func_arg, scm_list_1 (ly_symbol2scm ("no-origin")));
+         return;
+       }
+      else if (head == ly_symbol2scm ("color"))
+       {
+         SCM color = scm_cadr (expr);
+         SCM r = scm_car (color);
+         SCM g = scm_cadr (color);
+         SCM b = scm_caddr (color);
+
+         (*func) (func_arg, scm_list_4 (ly_symbol2scm ("setcolor"), r, g, b));
+         interpret_stencil_expression (scm_caddr (expr), func, func_arg, o);
+         (*func) (func_arg, scm_list_1 (ly_symbol2scm ("resetcolor")));
+
+         return;
+       }
+      else
+       {
+         (*func) (func_arg,
+                  scm_list_4 (ly_symbol2scm ("placebox"),
+                              scm_make_real (o[X_AXIS]),
+                              scm_make_real (o[Y_AXIS]),
+                              expr));
+         return;
+       }
+    }
+}
+
+struct Font_list
+{
+  SCM fonts_;
+};
+
+static void
+find_font_function (void *fs, SCM x)
+{
+  Font_list *me = (Font_list *) fs;
+
+  if (scm_car (x) == ly_symbol2scm ("placebox"))
+    {
+      SCM args = scm_cdr (x);
+      SCM what = scm_caddr (args);
+
+      if (scm_is_pair (what))
+       {
+         SCM head = scm_car (what);
+         if (ly_symbol2scm ("text") == head)
+           me->fonts_ = scm_cons (scm_cadr (what), me->fonts_);
+         else if (head == ly_symbol2scm ("char"))
+           me->fonts_ = scm_cons (scm_cadr (what), me->fonts_);
+       }
+    }
+}
+
+SCM
+find_expression_fonts (SCM expr)
+{
+  Font_list fl;
+
+  fl.fonts_ = SCM_EOL;
+
+  interpret_stencil_expression (expr, &find_font_function,
+                               (void *) & fl, Offset (0, 0));
+
+  return fl.fonts_;
+}
+