/*
- text-item.cc -- implement Item
+ text-item.cc -- implement Text_item
source file of the GNU LilyPond music typesetter
- (c) 1998--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
+ (c) 1998--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
*/
+#include <math.h>
#include "debug.hh"
-#include "molecule.hh"
+#include "text-item.hh"
#include "paper-def.hh"
-#include "lookup.hh"
+#include "font-interface.hh"
+#include "staff-symbol-referencer.hh"
#include "staff-symbol-referencer.hh"
+#include "main.hh"
+#include "all-font-metrics.hh"
+#include "afm.hh"
+
+
+/*
+
+ TEXT: STRING
+ | (MARKUP? TEXT+)
+ ;
+
+ HEAD: MARKUP-ITEM | (MARKUP-ITEM+)
+
+ MARKUP-ITEM: PROPERTY | ABBREV | FONT-STYLE
+ PROPERTY: (key . value)
+ ABBREV: rows lines roman music bold italic named super sub text
+
+*/
+
+Molecule
+Text_item::text2molecule (Grob *me, SCM text, SCM alist_chain)
+{
+ if (gh_string_p (text))
+ return string2molecule (me, text, alist_chain);
+ else if (gh_pair_p (text))
+ {
+ /* urg, why not just do this in markup_text2molecule ? */
+ if (gh_string_p (ly_car (text)))
+ return markup_text2molecule (me,
+ gh_append2 (scm_list_n (SCM_EOL,
+ SCM_UNDEFINED),
+ text),
+ alist_chain);
+ /*
+ Allow (faulty) texts that are in an extra list:
+ #'(("foo"))
+ */
+ else if (scm_ilength (text) <= 1)
+ return text2molecule (me, ly_car (text), alist_chain);
+ else
+ return markup_text2molecule (me, text, alist_chain);
+ }
+ return Molecule ();
+}
+
+Molecule
+Text_item::string2molecule (Grob *me, SCM text, SCM alist_chain)
+{
+ SCM style = ly_assoc_chain (ly_symbol2scm ("font-style"),
+ alist_chain);
+ if (gh_pair_p (style) && gh_symbol_p (ly_cdr (style)))
+ alist_chain = Font_interface::add_style (me, ly_cdr (style), alist_chain);
+
+ Font_metric *fm = Font_interface::get_font (me, alist_chain);
+
+ SCM lookup = ly_assoc_chain (ly_symbol2scm ("lookup"), alist_chain);
+
+ Molecule mol;
+ if (gh_pair_p (lookup) && ly_cdr (lookup) ==ly_symbol2scm ("name"))
+ mol = lookup_character (me, fm, text);
+ else
+ mol = lookup_text (me, fm, text);
+
+ return mol;
+}
-struct Text_item
+Molecule
+Text_item::lookup_character (Grob *, Font_metric*fm, SCM char_name)
{
- static SCM brew_molecule (SCM);
-};
+ return fm->find_by_name (ly_scm2string (char_name));
+}
+
+
+Molecule
+Text_item::lookup_text (Grob *me, Font_metric*fm, SCM text)
+{
+#if 0
+ /*
+ Fixme; should be done differently, move to font-interface?
+
+ differently -- how/why?
+ */
+
+ SCM magnification = me->get_grob_property ("font-magnification");
+
+ Font_metric* metric = 0;
+ if (gh_number_p (magnification))
+ {
+
+ Real realmag = pow (1.2, gh_scm2int (magnification));
+ metric = all_fonts_global_p->find_scaled (ly_scm2string (font_name), realmag);
+
+ assert (false);
+ }
+#else
+ SCM magnification = me->get_grob_property ("font-magnification");
+
+ if (gh_number_p (magnification) && gh_scm2double (magnification) > 1)
+ programming_error ("font-magnification disabled");
+#endif
+
+
+ SCM list = scm_list_n (ly_symbol2scm ("text"), text, SCM_UNDEFINED);
+ list = fontify_atom (fm, list);
+
+ return Molecule (fm->text_dimension (ly_scm2string (text)), list);
+}
+/*
+ TODO:
-MAKE_SCHEME_SCORE_ELEMENT_CALLBACK(Text_item,brew_molecule)
+ DOCME.
+
+ MARKUP_TEXT must be compound (may not be simple string.)
+
+ */
+Molecule
+Text_item::markup_text2molecule (Grob *me, SCM markup_text,
+ SCM alist_chain)
+{
+ SCM sheet = me->paper_l ()->style_sheet_;
+ SCM f = ly_cdr (scm_assoc (ly_symbol2scm ("markup-to-properties"), sheet));
+
+ SCM markup = ly_car (markup_text);
+ SCM text = ly_cdr (markup_text);
+
+ SCM p = gh_cons (gh_call2 (f, sheet, markup), alist_chain);
+
+ Real staff_space = Staff_symbol_referencer::staff_space (me);
+
+ /*
+ Line mode is default.
+ */
+ Axis axis = X_AXIS;
+
+ SCM a = ly_assoc_chain (ly_symbol2scm ("axis"), p);
+ if (gh_pair_p (a) && isaxis_b (ly_cdr (a)))
+ axis = (Axis)gh_scm2int (ly_cdr (a));
+
+ Real baseline_skip = 0;
+ SCM b = ly_assoc_chain (ly_symbol2scm ("baseline-skip"), p);
+ if (gh_pair_p (b) && gh_number_p (ly_cdr (b)))
+ baseline_skip = gh_scm2double (ly_cdr (b)) * staff_space;
+
+ Real kern[2] = {0,0};
+
+ SCM k = ly_assoc_chain (ly_symbol2scm ("kern"), p);
+ if (gh_pair_p (k) && gh_number_p (ly_cdr (k)))
+ kern[axis] = gh_scm2double (ly_cdr (k)) * staff_space;
+
+ Real raise = 0;
+ SCM r = ly_assoc_chain (ly_symbol2scm ("raise"), p);
+ if (gh_pair_p (r) && gh_number_p (ly_cdr (r)))
+ raise = gh_scm2double (ly_cdr (r)) * staff_space;
+
+ Interval extent;
+ bool extent_b = false;
+ SCM e = ly_assoc_chain (ly_symbol2scm ("extent"), p);
+ if (gh_pair_p (e) && ly_number_pair_p (ly_cdr (e)))
+ {
+ extent = Interval (gh_scm2double (ly_cadr (e)) * staff_space,
+ gh_scm2double (ly_cddr (e)) * staff_space);
+ extent_b = true;
+ }
+
+ Offset o (0, (axis == Y_AXIS ? - kern[axis] : 0));
+
+ Molecule mol;
+ while (gh_pair_p (text))
+ {
+
+ Molecule m = text2molecule (me, ly_car (text), p);
+
+ /*
+ TODO: look at padding?
+
+ Look ahead here for kern and raise.
+
+ (cols "foo" ((raise . 1) "bar"))
+ (cols "foo" ((bold (raise . 1)) "bar"))
+
+ When constructing the molecule for bar, all normal extra
+ properties found, such as bold, are used for the construction
+ of bar's molecule. But for kern or raise, it seems that we're
+ too late then, translating bar's molecule has no effect (or
+ maybe the effect of translating gets nullified when bar's
+ molecule is `added_to_edge' of the molecule for foo?)
+
+ So, while constructing foo's molecule, we look ahead for the
+ raise of bar. The HEAD of the description of bar may be a
+ single property, or a list, so we must check that too.
+ */
+
+ SCM next_p = SCM_EOL;
+ if (gh_pair_p (ly_car (text)))
+ next_p = scm_list_n (gh_call2 (f, sheet, ly_caar (text)), SCM_UNDEFINED);
+ SCM next_k = ly_assoc_chain (ly_symbol2scm ("kern"), next_p);
+ Real next_kern = kern[axis];
+ if (gh_pair_p (next_k) && gh_number_p (ly_cdr (next_k)))
+ next_kern = gh_scm2double (ly_cdr (next_k)) * staff_space;
+
+ SCM next_r = ly_assoc_chain (ly_symbol2scm ("raise"), next_p);
+ Real next_raise = 0;
+ if (gh_pair_p (next_r) && gh_number_p (ly_cdr (next_r)))
+ next_raise = gh_scm2double (ly_cdr (next_r)) * staff_space;
+
+ o[Y_AXIS] = next_raise;
+
+ if (!m.empty_b ())
+ {
+ m.translate (o);
+ if (mol.empty_b ())
+ mol = m;
+ else
+ {
+ if (axis == Y_AXIS && baseline_skip)
+ next_kern += baseline_skip - m.extent (Y_AXIS)[UP];
+ mol.add_at_edge (axis, axis == X_AXIS ? RIGHT : DOWN, m, next_kern);
+ }
+ }
+ text = ly_cdr (text);
+ }
+
+ if (extent_b)
+ {
+#if 0
+ /* Hmm, we're not allowed to change a Molecule's extent? */
+ mol.dim_[axis] = extent;
+ Molecule::ly_set_molecule_extent_x (mol.self_scm (), gh_int2scm (axis),
+ ly_cdr (e));
+#else
+ // burp: unpredictable names, these...
+ Box b = mol.extent_box ();
+ SCM expr = mol.get_expr ();
+
+ b[axis] = extent;
+ mol = Molecule (b, expr);
+#endif
+ }
+ return mol;
+}
+
+MAKE_SCHEME_CALLBACK (Text_item, brew_molecule, 1);
SCM
-Text_item::brew_molecule (SCM sm)
+Text_item::brew_molecule (SCM smob)
{
- Score_element * s = unsmob_element (sm);
+ Grob *me = unsmob_grob (smob);
- SCM style = s->get_elt_property ("style");
- String st = gh_string_p (style) ? ly_scm2string (style) : "";
- SCM txt = s-> get_elt_property ("text");
- String t = gh_string_p (txt) ? ly_scm2string (txt) : "";
+ SCM text = me->get_grob_property ("text");
- Molecule mol = s->paper_l ()->lookup_l(0)->text (st, t, s->paper_l ());
+ SCM properties = Font_interface::font_alist_chain (me);
+ Molecule mol = Text_item::text2molecule (me, text, properties);
- SCM space = s->get_elt_property ("word-space");
+ SCM space = me->get_grob_property ("word-space");
if (gh_number_p (space))
{
Molecule m;
m.set_empty (false);
- mol.add_at_edge (X_AXIS, RIGHT, m, gh_scm2double (space)*
- Staff_symbol_referencer_interface (s).staff_space ());
+ mol.add_at_edge (X_AXIS, RIGHT, m, gh_scm2double (space)
+ * Staff_symbol_referencer::staff_space (me));
}
- return mol.create_scheme ();
+ return mol.smobbed_copy ();
}
-
projects / lilypond.git / blobdiff