* lily/include/translator.hh (class Translator): rename

[lilypond.git] / lily / text-item.cc

diff --git a/lily/text-item.cc b/lily/text-item.cc
index 84a006243daf7f0a90053dc2a229d6c247f48031..782cd4d1c1457e2eeecea74e0ecf6cb69ed54e1b 100644 (file)
--- a/lily/text-item.cc
+++ b/lily/text-item.cc
@@ -1,47 +1,101 @@
 /*   
-  text-item.cc -- implement Item
+  text-item.cc -- implement Text_item
 
   source file of the GNU LilyPond music typesetter
   
-  (c) 1998--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-  
+  (c) 1998--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  Jan Nieuwenhuizen <janneke@gnu.org>
  */
+#include <math.h>
 
-#include "debug.hh"
-#include "molecule.hh"
+#include "warn.hh"
+#include "grob.hh"
+#include "text-item.hh"
+#include "font-interface.hh"
+#include "virtual-font-metric.hh"
 #include "paper-def.hh"
-#include "lookup.hh"
-#include "staff-symbol-referencer.hh"
+#include "scaled-font-metric.hh"
 
-struct Text_item
+MAKE_SCHEME_CALLBACK (Text_item, interpret_string, 4)
+SCM
+Text_item::interpret_string (SCM paper, SCM props, SCM encoding, SCM markup)
 {
-  static SCM brew_molecule (SCM);
-};
+  Paper_def *pap = unsmob_paper (paper);
+  
+  SCM_ASSERT_TYPE(pap, paper, SCM_ARG1, __FUNCTION__, "Paper definition");
+  SCM_ASSERT_TYPE(ly_c_string_p (markup), markup, SCM_ARG3, __FUNCTION__, "string");
+  SCM_ASSERT_TYPE(encoding == SCM_EOL
+                 || ly_c_symbol_p (encoding), encoding, SCM_ARG2, __FUNCTION__, "symbol");
+  
+  String str = ly_scm2string (markup);
+  Font_metric *fm = select_encoded_font (pap, props, encoding);
 
+  SCM lst = SCM_EOL;      
+  Box b;
+  if (Modified_font_metric* mf = dynamic_cast<Modified_font_metric*> (fm))
+    {
+      lst = scm_list_3 (ly_symbol2scm ("text"),
+                       mf->self_scm (),
+                       markup);
+       
+      b = mf->text_dimension (str);
+    }
+  else
+    {
+      /* ARGH. */
+      programming_error ("Must have Modified_font_metric for text.");
+    }
+      
+  return Stencil (b, lst).smobbed_copy ();
+}
 
-MAKE_SCHEME_SCORE_ELEMENT_CALLBACK(Text_item,brew_molecule)
 
-SCM 
-Text_item::brew_molecule (SCM sm) 
+MAKE_SCHEME_CALLBACK (Text_item, interpret_markup, 3)
+SCM
+Text_item::interpret_markup (SCM paper, SCM props, SCM markup)
 {
-  Score_element * s = unsmob_element (sm);
+  if (ly_c_string_p (markup))
+    return interpret_string (paper, props, SCM_EOL, markup);
+  else if (ly_c_pair_p (markup))
+    {
+      SCM func = ly_car (markup);
+      SCM args = ly_cdr (markup);
+      if (!markup_p (markup))
+       programming_error ("Markup head has no markup signature.");
+      
+      return scm_apply_2 (func, paper, props, args);
+    }
+  return SCM_EOL;
+}
+
+MAKE_SCHEME_CALLBACK (Text_item,print,1);
+SCM
+Text_item::print (SCM grob)
+{
+  Grob *me = unsmob_grob (grob);
   
-  SCM style = s->get_elt_property ("style");
-  String st = gh_string_p (style) ?  ly_scm2string (style) : "";
-  SCM txt = s-> get_elt_property ("text");
-  String t = gh_string_p (txt) ? ly_scm2string (txt) : "";
+  SCM t = me->get_property ("text");
+  SCM chain = Font_interface::text_font_alist_chain (me);
+  return interpret_markup (me->get_paper ()->self_scm (), chain, t);
+}
 
-  Molecule mol =  s->paper_l ()->lookup_l(0)->text (st, t, s->paper_l ());
 
-  SCM space =  s->get_elt_property ("word-space");
-  if (gh_number_p (space))
-    {
-      Molecule m;
-      m.set_empty (false);
-      mol.add_at_edge (X_AXIS, RIGHT, m, gh_scm2double (space)*
-                      Staff_symbol_referencer_interface (s).staff_space ());
-    }
-  return mol.create_scheme (); 
+/*
+  Ugh. Duplicated from Scheme.
+ */
+bool
+Text_item::markup_p (SCM x)
+{
+  return
+    ly_c_string_p (x) ||
+    (ly_c_pair_p (x)
+     && SCM_BOOL_F != scm_object_property (ly_car (x), ly_symbol2scm ("markup-signature")));
 }
 
+ADD_INTERFACE (Text_item,"text-interface",
+  "A scheme markup text, see @usermanref{Text-markup}.",
+  "text baseline-skip word-space");
+
+
+