X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Ftext-interface.cc;h=55e7bb7ec4c09a81ed73185271ef0c00a3ab3ef3;hb=c5a3f0c024f4cb629811cff9eb04abff36e94138;hp=eec815089429a4ff115244552bbcea2e33c46535;hpb=16cb456cabf477f6d398ff731aa0f10b60913394;p=lilypond.git

diff --git a/lily/text-interface.cc b/lily/text-interface.cc
index eec8150894..55e7bb7ec4 100644
--- a/lily/text-interface.cc
+++ b/lily/text-interface.cc
@@ -25,20 +25,25 @@ 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");
+  LY_ASSERT_SMOB (Output_def, layout_smob, 1);
+  LY_ASSERT_TYPE (scm_is_string, markup, 3);
 
   string str = ly_scm2string (markup);
-
+  Output_def *layout = unsmob_output_def (layout_smob);
   Font_metric *fm = select_encoded_font (layout, props);
   return fm->word_stencil (str).smobbed_copy ();
 }
 
-MAKE_SCHEME_CALLBACK (Text_interface, interpret_markup, 3);
+MAKE_SCHEME_CALLBACK_WITH_OPTARGS (Text_interface, interpret_markup, 3, 0,
+				   "Convert a text markup into a stencil. "
+"Takes 3 arguments, @var{layout}, @var{props} and @var{markup}. "
+"\n\n"
+"@var{layout} is a @code{\\layout} block; it may be obtained from a grob with "
+"@code{ly:grob-layout}.  @var{props} is a alist chain, ie. a list of alists. "
+"This is typically obtained with "
+"@code{(ly:grob-alist-chain (ly:layout-lookup layout 'text-font-defaults))}. "
+"@var{markup} is the markup text to be processed. "
+				   );
 SCM
 Text_interface::interpret_markup (SCM layout_smob, SCM props, SCM markup)
 {
@@ -92,7 +97,13 @@ Text_interface::is_markup (SCM x)
 }
 
 ADD_INTERFACE (Text_interface,
-	       "A scheme markup text, see @usermanref{Text markup}.",
+	       "A scheme markup text, see @usermanref{Text markup} and "
+	       "@usermanref{New markup command definition}. "
+	       "\n\n"
+	       "There are two important commands: ly:text-interface::print, which is a "
+	       "grob callback, and ly:text-interface::interpret-markup ",
+
+	       /* props */
 	       "baseline-skip "
 	       "text "
 	       "word-space "