source file of the GNU LilyPond music typesetter
- (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "stencil.hh"
-#include <math.h>
#include "dimensions.hh"
#include "font-metric.hh"
#include "input-smob.hh"
-#include "libc-extension.hh" // isinf
#include "string-convert.hh"
#include "warn.hh"
return dim_[a];
}
-/* Hmm... maybe this is not such a good idea ; stuff can be empty,
- while expr_ == '() */
bool
Stencil::is_empty () const
{
- return expr_ == SCM_EOL;
+ return (expr_ == SCM_EOL
+ || dim_[X_AXIS].is_empty ()
+ || dim_[Y_AXIS].is_empty ());
}
SCM
|| isnan (o[a])
// ugh, hardcoded.
- || fabs (o[a]) > 1e6)
+ || fabs (o[a]) > 1e6)
{
programming_error (String_convert::form_string ("Improbable offset for stencil: %f staff space", o[a])
+ "\n"
add_stencil (moved_to_edge (a, d, s, padding, minimum));
}
-/****************************************************************/
-
-void
-interpret_stencil_expression (SCM expr,
- void (*func) (void *, SCM),
- void *func_arg,
- Offset o)
-{
- while (1)
- {
- if (!scm_is_pair (expr))
- return;
-
- SCM head = scm_car (expr);
-
- if (head == ly_symbol2scm ("translate-stencil"))
- {
- o += ly_scm2offset (scm_cadr (expr));
- expr = scm_caddr (expr);
- }
- else if (head == ly_symbol2scm ("combine-stencil"))
- {
- for (SCM x = scm_cdr (expr); scm_is_pair (x); x = scm_cdr (x))
- interpret_stencil_expression (scm_car (x), func, func_arg, o);
- return;
- }
- else if (head == ly_symbol2scm ("grob-cause"))
- {
- SCM grob = scm_cadr (expr);
-
- (*func) (func_arg, scm_list_3 (head,
- ly_quote_scm (ly_offset2scm (o)), grob));
- interpret_stencil_expression (scm_caddr (expr), func, func_arg, o);
- (*func) (func_arg, scm_list_1 (ly_symbol2scm ("no-origin")));
- return;
- }
- else if (head == ly_symbol2scm ("color"))
- {
- SCM color = scm_cadr (expr);
- SCM r = scm_car (color);
- SCM g = scm_cadr (color);
- SCM b = scm_caddr (color);
-
- (*func) (func_arg, scm_list_4 (ly_symbol2scm ("setcolor"), r, g, b));
- interpret_stencil_expression (scm_caddr (expr), func, func_arg, o);
- (*func) (func_arg, scm_list_1 (ly_symbol2scm ("resetcolor")));
-
- return;
- }
- else
- {
- (*func) (func_arg,
- scm_list_4 (ly_symbol2scm ("placebox"),
- scm_make_real (o[X_AXIS]),
- scm_make_real (o[Y_AXIS]),
- expr));
- return;
- }
- }
-}
-
-struct Font_list
-{
- SCM fonts_;
-};
-
-static void
-find_font_function (void *fs, SCM x)
-{
- Font_list *me = (Font_list *) fs;
-
- if (scm_car (x) == ly_symbol2scm ("placebox"))
- {
- SCM args = scm_cdr (x);
- SCM what = scm_caddr (args);
-
- if (scm_is_pair (what))
- {
- SCM head = scm_car (what);
- if (ly_symbol2scm ("text") == head)
- me->fonts_ = scm_cons (scm_cadr (what), me->fonts_);
- else if (head == ly_symbol2scm ("char"))
- me->fonts_ = scm_cons (scm_cadr (what), me->fonts_);
- }
- }
-}
-
-SCM
-find_expression_fonts (SCM expr)
+Stencil
+Stencil::in_color (Real r, Real g, Real b) const
{
- Font_list fl;
-
- fl.fonts_ = SCM_EOL;
-
- interpret_stencil_expression (expr, &find_font_function,
- (void *) & fl, Offset (0, 0));
-
- return fl.fonts_;
+ Stencil new_stencil (extent_box (),
+ scm_list_3 (ly_symbol2scm ("color"),
+ scm_list_3 (scm_from_double (r),
+ scm_from_double (g),
+ scm_from_double (b)),
+ expr ()));
+ return new_stencil;
}
-