* lily/modified-font-metric.cc (text_dimension): try

[lilypond.git] / lily / paper-def.cc

diff --git a/lily/paper-def.cc b/lily/paper-def.cc
index 85cb00b73e2724c61e45e027d094006a9613a30e..83b3491da85bc80493f9072ac8ac176429054b4a 100644 (file)
--- a/lily/paper-def.cc
+++ b/lily/paper-def.cc
@@ -1,96 +1,113 @@
-/*
+/* 
   paper-def.cc -- implement Paper_def
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 2004 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
 
-
-#include <math.h>
-
-#include "book-paper-def.hh"
-#include "virtual-font-metric.hh"
-#include "all-font-metrics.hh"
-#include "string.hh"
-#include "misc.hh"
-#include "paper-def.hh"
-#include "warn.hh"
-#include "scaled-font-metric.hh"
-#include "main.hh"
-#include "scm-hash.hh"
-#include "paper-outputter.hh"
+#include "dimensions.hh"
 #include "ly-module.hh"
+#include "output-def.hh"
+#include "modified-font-metric.hh"
+#include "pango-font.hh"
 
-/*
-  This is an almost empty thing. The only substantial thing this class
-  handles is scaling up and down to real-world dimensions (internally
-  dimensions are against global staff-space.)
- */
-
-Paper_def::Paper_def ()
-{
-  bookpaper_ = 0;
-}
-
-Paper_def::Paper_def (Paper_def const&src)
-  : Music_output_def (src)
+Real
+output_scale (Output_def *od)
 {
-  /* Do not remove this statement, scm_make_hash_table may trigger GC.  */
-  bookpaper_ = 0;
+  return scm_to_double (od->lookup_variable (ly_symbol2scm ("outputscale")));
 }
 
-Paper_def::~Paper_def ()
-{
-}
 
-void
-Paper_def::derived_mark ()
+SCM
+get_font_table (Output_def *def)
 {
-  if (bookpaper_)
-    scm_gc_mark (bookpaper_->self_scm ());
+  SCM font_table = def->lookup_variable (ly_symbol2scm ("scaled-fonts"));
+  if (scm_hash_table_p (font_table) != SCM_BOOL_T)
+    {
+      font_table = scm_c_make_hash_table (11);
+      def->set_variable (ly_symbol2scm ("scaled-fonts"), font_table);
+    }
+  return font_table;
 }
+  
 
-Real
-Paper_def::get_dimension (SCM s) const
-{
-  SCM val = lookup_variable (s);
-  return ly_scm2double (val);
-}
 
-/* FIXME.  This is broken until we have a generic way of
-   putting lists inside the \paper block.  */
-Interval
-Paper_def::line_dimensions_int (int n) const
+/* TODO: should add nesting for Output_def here too. */
+Font_metric *
+find_scaled_font (Output_def *mod, Font_metric *f, Real m,
+                 SCM font_encoding, SCM input_encoding)
 {
-  Real lw =  get_dimension (ly_symbol2scm ("linewidth"));
-  Real ind = n? 0.0:get_dimension (ly_symbol2scm ("indent"));
+  if (mod->parent_)
+    return find_scaled_font (mod->parent_, f, m, font_encoding, input_encoding);
+  
+  Real lookup_mag = m / output_scale (mod);
 
-  return Interval (ind, lw);
+  
+  
+  SCM font_table = get_font_table (mod);
+  SCM sizes = scm_hashq_ref (font_table, f->self_scm (), SCM_BOOL_F);
+  if (sizes != SCM_BOOL_F)
+    {
+      SCM met = scm_assoc (scm_make_real (lookup_mag), sizes);
+      if (scm_is_pair (met))
+       return unsmob_metrics (scm_cdr (met));
+    }
+  else
+    sizes = SCM_EOL;
+  
+  SCM val = Modified_font_metric::make_scaled_font_metric (f, lookup_mag,
+                                                          font_encoding,
+                                                          input_encoding);
+
+  sizes = scm_acons (scm_make_real (lookup_mag), val, sizes);
+  scm_gc_unprotect_object (val);
+  scm_hashq_set_x (font_table, f->self_scm (), sizes);
+  return unsmob_metrics (val);
 }
 
-Paper_outputter*
-Paper_def::get_paper_outputter (String outname) const
+/* TODO: this is a nasty interface. During formatting,
+   the Output_def should be scaled to the output_scale_
+   specified in the toplevel Output_def.  */
+Output_def * 
+scale_output_def (Output_def *o, Real amount)
 {
-  progress_indication (_f ("paper output to `%s'...",
-                          outname == "-" ? String ("<stdout>") : outname));
-  return new Paper_outputter (outname);
+  SCM proc = ly_lily_module_constant ("scale-layout");
+  SCM new_pap = scm_call_2 (proc, o->self_scm (), scm_double2num (amount));
+  scm_gc_protect_object (new_pap);
 
+  return unsmob_output_def (new_pap);
 }
 
-Paper_def* 
-unsmob_paper (SCM x)
+LY_DEFINE (ly_paper_fonts, "ly:paper-fonts",
+          1, 0, 0,
+          (SCM bp),
+          "Return fonts scaled up BP")
 {
-  return dynamic_cast<Paper_def*> (unsmob_music_output_def (x));
-}
-  
+  Output_def *b = unsmob_output_def (bp);
 
-LY_DEFINE (ly_paper_def_p, "ly:paper-def?",
-          1, 0, 0, (SCM def),
-          "Is @var{def} a paper definition?")
-{
-  Paper_def *op = dynamic_cast<Paper_def*> (unsmob_music_output_def (def));
-
-  bool pap = op;
-  return ly_bool2scm (pap);
+  SCM font_table = b->lookup_variable (ly_symbol2scm ("scaled-fonts"));
+  
+  SCM_ASSERT_TYPE (b, bp, SCM_ARG1, __FUNCTION__, "paper");
+
+  SCM ell = SCM_EOL;
+  if (scm_hash_table_p (font_table) == SCM_BOOL_T)
+    {
+      SCM func = ly_lily_module_constant ("hash-table->alist");
+
+      for (SCM s = scm_call_1 (func, font_table); scm_is_pair (s);
+          s = scm_cdr (s))
+       {
+         SCM entry = scm_car (s);
+         for (SCM t = scm_cdr (entry); scm_is_pair (t); t = scm_cdr (t))
+           {
+             Font_metric *fm = unsmob_metrics (scm_cdar (t));
+
+             if (dynamic_cast<Modified_font_metric*> (fm)
+                 || dynamic_cast<Pango_font*> (fm))
+               ell = scm_cons (fm->self_scm (), ell);
+           }
+       }
+    }
+  return ell;
 }