/*
- font-metric.cc -- implement Font_metric
+ font-metric.cc -- implement Font_metric
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>
-#include <math.h>
-#include <ctype.h>
+ Mats Bengtsson <matsb@s3.kth.se> (the ugly TeX parsing in text_dimension)
+*/
-#include "ly-smobs.icc"
#include "font-metric.hh"
-Box
-Font_metric::text_dimension (String text) const
-{
- Interval ydims;
- Real w=0.0;
-
- for (int i = 0; i < text.length_i (); i++)
- {
-
- if (text[i]=='\\')
- {
- for (i++; (i < text.length_i ()) && isalpha(text[i]); i++)
- ;
- // ugh.
- i--; // Compensate for the increment in the outer loop!
- }
- else
- {
- Box b = get_char ((unsigned char)text[i],false);
-
- // Ugh, use the width of 'x' for unknown characters
- if (b[X_AXIS].length () == 0)
- b = get_char ((unsigned char)'x',false);
-
- w += b[X_AXIS].length ();
- ydims.unite (b[Y_AXIS]);
- }
- }
- if (ydims.empty_b ())
- ydims = Interval (0,0);
+#include <math.h>
+#include <cctype>
- return Box(Interval (0, w), ydims);
-}
+#include "modified-font-metric.hh"
+#include "virtual-methods.hh"
+#include "warn.hh"
+#include "stencil.hh"
+#include "ly-smobs.icc"
-Box
-Scaled_font_metric::text_dimension (String t) const
+Real
+Font_metric::design_size () const
{
- Real realmag = pow (1.2, magstep_i_);
- Box b (orig_l_->text_dimension (t));
+ return 1.0;
+}
- return Box(b[X_AXIS]* realmag, b[Y_AXIS]*realmag);
+String
+Font_metric::coding_scheme () const
+{
+ return "FontSpecific";
}
-Font_metric::~Font_metric ()
+Stencil
+Font_metric::find_by_name (String s) const
{
- unsmobify_self ();
+ s = s.substituted ('-', "M");
+ int idx = name_to_index (s);
+ Box b;
+
+ SCM expr = SCM_EOL;
+ if (idx >= 0)
+ {
+ expr = scm_list_3 (ly_symbol2scm ("char"),
+ self_scm (),
+ scm_int2num (index_to_ascii (idx)));
+ b = get_indexed_char (idx);
+ }
+
+ Stencil q (b, expr);
+ return q;
}
Font_metric::Font_metric ()
{
+ description_ = SCM_EOL;
self_scm_ = SCM_EOL;
- name_ = SCM_EOL;
smobify_self ();
}
}
-
-Box
-Font_metric::get_char (int, bool)const
+Font_metric::~Font_metric ()
{
- return Box (Interval(0,0),Interval (0,0));
}
-Scaled_font_metric::Scaled_font_metric (Font_metric* m, int s)
+int
+Font_metric::count () const
{
- magstep_i_ = s;
- orig_l_ = m;
+ return 0;
}
-SCM
-Font_metric::description () const
+Box
+Font_metric::get_ascii_char (int) const
{
- return gh_cons (name_, gh_int2scm (0));
+ return Box (Interval (0, 0), Interval (0, 0));
}
+Box
+Font_metric::get_indexed_char (int k) const
+{
+ return get_ascii_char (k);
+}
-SCM
-Scaled_font_metric::description () const
+int
+Font_metric::name_to_index (String) const
{
- SCM od = orig_l_->description ();
- gh_set_cdr_x (od, gh_int2scm (magstep_i_));
- return od;
+ return -1;
}
+Offset
+Font_metric::get_indexed_wxwy (int) const
+{
+ return Offset (0, 0);
+}
void
-Font_metric::do_smobify_self ()
+Font_metric::derived_mark () const
{
}
SCM
Font_metric::mark_smob (SCM s)
{
- Font_metric * m = SMOB_TO_TYPE(Font_metric, s);
- return m->name_;
+ 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::print_smob (SCM s, SCM port, scm_print_state *)
{
Font_metric *m = unsmob_metrics (s);
- scm_puts ("#<Font_metric ", port);
- scm_display (m->name_, port);
+ scm_puts ("#<", port);
+ scm_puts (classname (m), port);
+ scm_puts (" ", port);
+ scm_write (m->description_, port);
scm_puts (">", port);
return 1;
}
-IMPLEMENT_UNSMOB(Font_metric, metrics);
+
+
+IMPLEMENT_SMOBS (Font_metric);
+IMPLEMENT_DEFAULT_EQUAL_P (Font_metric);
+IMPLEMENT_TYPE_P (Font_metric, "ly:font-metric?");
+
+
+LY_DEFINE (ly_font_get_glyph, "ly:font-get-glyph",
+ 2, 0, 0,
+ (SCM font, SCM name),
+ "Return a Stencil from @var{font} for the glyph named @var{name}. "
+ "@var{font} must be available as an AFM file. If the glyph "
+ "is not available, return @code{#f}.")
+{
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ SCM_ASSERT_TYPE (scm_is_string (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),
+ "Retrieve 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 (scm_is_number (index), index, SCM_ARG2, __FUNCTION__, "number");
+
+ return fm->get_ascii_char_stencil (scm_to_int (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;
+ Modified_font_metric*fm = dynamic_cast<Modified_font_metric*>
+ (unsmob_metrics (font));
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "modified font metric");
+ SCM_ASSERT_TYPE (scm_is_string (text), text, SCM_ARG2, __FUNCTION__, "string");
+
+ b = fm->text_dimension (ly_scm2string (text));
+
+ return scm_cons (ly_interval2scm (b[X_AXIS]), ly_interval2scm (b[Y_AXIS]));
+}
+
+LY_DEFINE (ly_font_file_name,"ly:font-file-name",
+ 1, 0, 0,
+ (SCM font),
+ "Given the font metric @var{font}, "
+ "return the corresponding file name.")
+{
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ return scm_car (fm->description_);
+}
+
+
+#include "afm.hh"
+
+LY_DEFINE (ly_font_name,"ly:font-name",
+ 1, 0, 0,
+ (SCM font),
+ "Given the font metric @var{font}, "
+ "return the corresponding name.")
+{
+ Font_metric *fm = unsmob_metrics (font);
+
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+
+
+ if (Modified_font_metric* mfm = dynamic_cast<Modified_font_metric*> (fm))
+ return ly_font_name (mfm->original_font ()->self_scm ());
+ else if (Adobe_font_metric* afm = dynamic_cast<Adobe_font_metric*> (fm))
+ {
+ return scm_makfrom0str (afm->font_info_->gfi->fontName);
+ }
+ else
+ return SCM_BOOL_F;
+}
+
+
+
+LY_DEFINE (ly_font_magnification,"ly:font-magnification", 1 , 0, 0,
+ (SCM font),
+ "Given the font metric @var{font}, return the "
+ "magnification, relative to the current outputscale.")
+{
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ return scm_cdr (fm->description_);
+}
+
+LY_DEFINE (ly_font_design_size,"ly:font-design-size", 1 , 0, 0,
+ (SCM font),
+ "Given the font metric @var{font}, return the "
+ "design size, relative to the current outputscale.")
+{
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ return scm_make_real (fm->design_size ());
+}
+
+
+
+int
+Font_metric::index_to_ascii (int i) const
+{
+ return i;
+}
+
+Stencil
+Font_metric::get_ascii_char_stencil (int code) const
+{
+ SCM at = scm_list_3 (ly_symbol2scm ("char"),
+ this->self_scm (),
+ scm_int2num (code));
+ Box b = get_ascii_char (code);
+ return Stencil (b, at);
+}
+
+Stencil
+Font_metric::get_indexed_char_stencil (int code) const
+{
+ int idx = index_to_ascii (code);
+ SCM at = scm_list_3 (ly_symbol2scm ("char"), self_scm (), scm_int2num (idx));
+ Box b = get_indexed_char (code);
+ return Stencil (b, at);
+}
+
+int
+/*Font_metric::*/
+get_encoded_index (Font_metric *m, String input_coding, int code)
+{
+ String font_coding = m->coding_scheme ();
+ if (font_coding == input_coding)
+ return code;
+ SCM s = scm_call_3 (ly_scheme_function ("encoded-index"),
+ scm_makfrom0str (input_coding.to_str0 ()),
+ scm_makfrom0str (font_coding.to_str0 ()),
+ scm_int2num (code));
+ return scm_to_int (s);
+}
projects / lilypond.git / blobdiff