source file of the GNU LilyPond music typesetter
- (c) 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
+ (c) 1999--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+
+ Mats Bengtsson <matsb@s3.kth.se> (the ugly TeX parsing in text_dimension)
*/
#include <math.h>
#include <ctype.h>
-
+#include "virtual-methods.hh"
+#include "warn.hh"
+#include "stencil.hh"
+#include "ly-smobs.icc"
#include "font-metric.hh"
+#include "string.hh"
Box
Font_metric::text_dimension (String text) const
Interval ydims;
Real w=0.0;
- for (int i = 0; i < text.length_i (); i++)
+ for (int i = 0; i < text.length (); i++)
{
- if (text[i]=='\\')
+ switch (text[i])
{
- for (i++; (i < text.length_i ()) && isalpha(text[i]); i++)
+ case '\\':
+ // accent marks use width of base letter
+ if (i +1 < text.length ())
+ {
+ if (text[i+1]=='\'' || text[i+1]=='`' || text[i+1]=='"' ||
+ text[i+1]=='^')
+ {
+ i++;
+ break;
+ }
+ // for string width \\ is a \ and \_ is a _.
+ if (text[i+1]=='\\' || text[i+1]=='_')
+ {
+ break;
+ }
+ }
+
+ for (i++; (i < text.length ()) && !isspace (text[i])
+ && text[i]!='{' && text[i]!='}'; i++)
;
// ugh.
i--; // Compensate for the increment in the outer loop!
- }
- else
- {
- Character_metric const *c = get_char ((unsigned char)text[i],false);
-
+ break;
+ case '{': // Skip '{' and '}'
+ case '}':
+ break;
+
+ default:
+ Box b = get_ascii_char ((unsigned char)text[i]);
+
// Ugh, use the width of 'x' for unknown characters
- if (c->dimensions()[X_AXIS].length () == 0)
- c = get_char ((unsigned char)'x',false);
+ if (b[X_AXIS].length () == 0)
+ b = get_ascii_char ((unsigned char)'x');
- w += c->dimensions()[X_AXIS].length ();
- ydims.unite (c->dimensions()[Y_AXIS]);
+ w += b[X_AXIS].length ();
+ ydims.unite (b[Y_AXIS]);
+ break;
}
}
- if (ydims.empty_b ())
+ if (ydims.is_empty ())
ydims = Interval (0,0);
- return Box(Interval (0, w), ydims);
+ return Box (Interval (0, w), ydims);
}
-Box
-Scaled_font_metric::text_dimension (String t) const
+
+Font_metric::~Font_metric ()
+{
+}
+
+Font_metric::Font_metric ()
{
- Real realmag = pow (1.2, magstep_i_);
- Box b (orig_l_->text_dimension (t));
+ description_ = SCM_EOL;
+ self_scm_ = SCM_EOL;
+ smobify_self ();
+}
- return Box(b[X_AXIS]* realmag, b[Y_AXIS]*realmag);
+Font_metric::Font_metric (Font_metric const &)
+{
}
+int
+Font_metric::count () const
+{
+ return 0;
+}
-Box
-Character_metric::dimensions () const
+Box
+Font_metric::get_ascii_char (int) const
{
- return Box(Interval(0,0), Interval(0,0));
+ return Box (Interval (0,0),Interval (0,0));
}
-Font_metric::~Font_metric ()
+Box
+Font_metric::get_indexed_char (int k) const
{
+ return get_ascii_char(k);
}
-Character_metric::~Character_metric()
+
+int
+Font_metric::name_to_index (String) const
{
+ return -1;
}
-Character_metric const *
-Font_metric::get_char (int, bool)const
+Offset
+Font_metric::get_indexed_wxwy (int )const
{
- return 0;
+ return Offset (0,0);
}
-Scaled_font_metric::Scaled_font_metric (Font_metric* m, int s)
+void
+Font_metric::derived_mark ()const
{
- magstep_i_ = s;
- orig_l_ = m;
+
}
SCM
-Font_metric::description () const
+Font_metric::mark_smob (SCM s)
{
- return gh_cons (ly_symbol2scm (name_str_.ch_C()), gh_int2scm (0));
+ Font_metric * m = (Font_metric*) SCM_CELL_WORD_1 (s);
+
+ m->derived_mark();
+ return m->description_;
}
+int
+Font_metric::print_smob (SCM s, SCM port, scm_print_state *)
+{
+ Font_metric *m = unsmob_metrics (s);
+ scm_puts ("#<", port);
+ scm_puts (classname (m), port);
+ scm_puts (" ", port);
+ scm_write (m->description_, port);
+ scm_puts (">", port);
+ return 1;
+}
-SCM
-Scaled_font_metric::description () const
+
+
+IMPLEMENT_SMOBS (Font_metric);
+IMPLEMENT_DEFAULT_EQUAL_P (Font_metric);
+IMPLEMENT_TYPE_P (Font_metric, "ly:font-metric?");
+
+Stencil
+Font_metric::find_by_name (String) const
+{
+ Stencil m ;
+ return m;
+}
+
+LY_DEFINE(ly_find_glyph_by_name, "ly:find-glyph-by-name", 2 , 0, 0,
+ (SCM font, SCM name),
+ "This function retrieves a Stencil for the glyph named @var{name} in "
+"@var{font}. The font must be available as an AFM file. If the glyph "
+"is not found, #f is returned. ")
+{
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE(fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ SCM_ASSERT_TYPE(gh_string_p (name), name, SCM_ARG2, __FUNCTION__, "string");
+
+ Stencil m = fm->find_by_name (ly_scm2string (name));
+
+ /*
+ TODO: make optional argument for default if not found.
+
+ */
+ return m.smobbed_copy ();
+}
+
+LY_DEFINE(ly_get_glyph, "ly:get-glyph", 2 , 0, 0,
+ (SCM font, SCM index),
+ "This function retrieves a Stencil for the glyph numbered @var{index} in "
+"@var{font}. ")
+{
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE(fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ SCM_ASSERT_TYPE(gh_number_p (index), index, SCM_ARG2, __FUNCTION__, "number");
+
+ return fm->get_ascii_char_stencil (gh_scm2int (index)).smobbed_copy ();
+}
+
+LY_DEFINE(ly_text_dimension,"ly:text-dimension", 2 , 0, 0,
+ (SCM font, SCM text),
+ "Given the font metric in @var{font} and the string @var{text}, compute "
+"the extents of that text in that font. The return value is a pair of "
+"number-pairs.")
+{
+ Box b;
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE(fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ SCM_ASSERT_TYPE(gh_string_p (text), text, SCM_ARG2, __FUNCTION__, "string");
+
+ b = fm->text_dimension (ly_scm2string (text));
+
+ return gh_cons (ly_interval2scm (b[X_AXIS]), ly_interval2scm(b[Y_AXIS]));
+}
+
+Stencil
+Font_metric::get_ascii_char_stencil (int code) const
+{
+ SCM at = scm_list_n (ly_symbol2scm ("char"), gh_int2scm (code),
+ SCM_UNDEFINED);
+ at = fontify_atom (this, at);
+ Box b = get_ascii_char (code);
+ return Stencil (b, at);
+}
+
+Stencil
+Font_metric::get_indexed_char_stencil (int code) const
{
- SCM od = orig_l_->description ();
- gh_set_cdr_x (od, gh_int2scm (magstep_i_));
- return od;
+ SCM at = scm_list_n (ly_symbol2scm ("char"), gh_int2scm (code),
+ SCM_UNDEFINED);
+ at = fontify_atom (this, at);
+ Box b = get_indexed_char (code);
+ return Stencil (b, at);
}
projects / lilypond.git / blobdiff