/*
- text-item.cc -- implement Text_interface
+ text-interface.cc -- implement Text_interface
source file of the GNU LilyPond music typesetter
- (c) 1998--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1998--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "text-item.hh"
+#include "text-interface.hh"
-#include <math.h>
#include "main.hh"
#include "config.hh"
#include "output-def.hh"
#include "modified-font-metric.hh"
+static void
+replace_whitespace (string *str)
+{
+ vsize i = 0;
+ vsize n = str->size ();
+
+ while (i < n)
+ {
+ vsize char_len = 1;
+ char cur = (*str)[i];
+
+ // U+10000 - U+10FFFF
+ if ((cur & 0x11110000) == 0x11110000)
+ char_len = 4;
+ // U+0800 - U+FFFF
+ else if ((cur & 0x11100000) == 0x11100000)
+ char_len = 3;
+ // U+0080 - U+07FF
+ else if ((cur & 0x11000000) == 0x11000000)
+ char_len = 2;
+ else if (cur & 0x10000000)
+ programming_error ("invalid utf-8 string");
+ else
+ // avoid the locale-dependent isspace
+ if (cur == '\n' || cur == '\t' || cur == '\v')
+ (*str)[i] = ' ';
+
+ i += char_len;
+ }
+}
+
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);
+ 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->text_stencil (str).smobbed_copy ();
+
+ replace_whitespace (&str);
+ 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 three 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 an alist chain, i.e. 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)
{
{
SCM func = scm_car (markup);
SCM args = scm_cdr (markup);
- if (!markup_p (markup))
- programming_error ("Markup head has no markup signature.");
+ if (!is_markup (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: ");
+ programming_error ("Object is not a markup. ");
+ scm_puts ("This object should be a markup: ", scm_current_error_port ());
scm_display (markup, scm_current_error_port ());
- assert (false);
+ scm_puts ("\n", scm_current_error_port ());
+
Box b;
b[X_AXIS].set_empty ();
b[Y_AXIS].set_empty ();
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);
+ return interpret_markup (me->layout ()->self_scm (), chain, t);
}
/* Ugh. Duplicated from Scheme. */
bool
-Text_interface::markup_p (SCM x)
+Text_interface::is_markup (SCM x)
{
return (scm_is_string (x)
|| (scm_is_pair (x)
ly_symbol2scm ("markup-signature"))));
}
-ADD_INTERFACE (Text_interface, "text-interface",
- "A scheme markup text, see @usermanref{Text markup}.",
- "text baseline-skip word-space");
+bool
+Text_interface::is_markup_list (SCM x)
+{
+ SCM music_list_p = ly_lily_module_constant ("markup-list?");
+ return scm_is_true (scm_call_1 (music_list_p, x));
+}
+
+
+ADD_INTERFACE (Text_interface,
+ "A Scheme markup text, see @ruser{Formatting text} and"
+ " @ruser{New markup command definition}.\n"
+ "\n"
+ "There are two important commands:"
+ " @code{ly:text-interface::print}, which is a"
+ " grob callback, and"
+ " @code{ly:text-interface::interpret-markup}.",
+
+ /* properties */
+ "baseline-skip "
+ "text "
+ "word-space "
+ "text-direction "
+ );