+/*
+ text-item.cc -- implement Text_interface
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1998--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
+*/
+
+#include "text-item.hh"
+
+#include <math.h>
+
+#include "main.hh"
+#include "config.hh"
+#include "pango-font.hh"
+#include "warn.hh"
+#include "grob.hh"
+#include "font-interface.hh"
+#include "output-def.hh"
+#include "modified-font-metric.hh"
+
+MAKE_SCHEME_CALLBACK (Text_interface, interpret_string, 3);
+SCM
+Text_interface::interpret_string (SCM layout_smob,
+ SCM props,
+ SCM markup)
+{
+ Output_def *layout = unsmob_output_def (layout_smob);
+
+ SCM_ASSERT_TYPE (layout, layout_smob, SCM_ARG1,
+ __FUNCTION__, "Layout definition");
+ SCM_ASSERT_TYPE (scm_is_string (markup), markup, SCM_ARG3,
+ __FUNCTION__, "string");
+
+ String str = ly_scm2string (markup);
+
+ Font_metric *fm = select_encoded_font (layout, props);
+ return fm->text_stencil (str).smobbed_copy ();
+}
+
+MAKE_SCHEME_CALLBACK (Text_interface, interpret_markup, 3);
+SCM
+Text_interface::interpret_markup (SCM layout_smob, SCM props, SCM markup)
+{
+ if (scm_is_string (markup))
+ return interpret_string (layout_smob, props, markup);
+ else if (scm_is_pair (markup))
+ {
+ SCM func = scm_car (markup);
+ SCM args = scm_cdr (markup);
+ if (!markup_p (markup))
+ programming_error ("Markup head has no markup signature.");
+
+ return scm_apply_2 (func, layout_smob, props, args);
+ }
+ else
+ {
+ programming_error ("Is not a markup: ");
+ scm_display (markup, scm_current_error_port ());
+ assert (false);
+ Box b;
+ b[X_AXIS].set_empty ();
+ b[Y_AXIS].set_empty ();
+
+ Stencil s (b, SCM_EOL);
+ return s.smobbed_copy ();
+ }
+}
+
+MAKE_SCHEME_CALLBACK (Text_interface, print, 1);
+SCM
+Text_interface::print (SCM grob)
+{
+ Grob *me = unsmob_grob (grob);
+
+ SCM t = me->get_property ("text");
+ SCM chain = Font_interface::text_font_alist_chain (me);
+ return interpret_markup (me->get_layout ()->self_scm (), chain, t);
+}
+
+/* Ugh. Duplicated from Scheme. */
+bool
+Text_interface::markup_p (SCM x)
+{
+ return (scm_is_string (x)
+ || (scm_is_pair (x)
+ && SCM_BOOL_F
+ != scm_object_property (scm_car (x),
+ ly_symbol2scm ("markup-signature"))));
+}
+
+ADD_INTERFACE (Text_interface, "text-interface",
+ "A scheme markup text, see @usermanref{Text markup}.",
+ "text baseline-skip word-space");
+