#include <math.h>
#include <libc-extension.hh> // isinf
+#include "input-smob.hh"
#include "font-metric.hh"
#include "dimensions.hh"
#include "interval.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;
+}
+
+SCM
+Stencil::expr () const
+{
+ return expr_;
+}
+
+Box
+Stencil::extent_box () const
+{
+ return dim_;
+}
Offset
Stencil::origin () const
{
dim_.unite (s.dim_);
}
+
+
void
Stencil::set_empty (bool e)
{
Stencil::align_to (Axis a, Real x)
{
if (is_empty ())
- return ;
+ return;
Interval i (extent (a));
translate_axis (-i.linear_combination (x), a);
}
/* FIXME: unintuitive naming, you would expect *this to be moved.
- Kept (keeping?) API for compat with add_at_edge (). */
+ Kept (keeping?) API for compat with add_at_edge ().
+
+ What is PADDING, what is MINIMUM, exactly? */
Stencil
-Stencil::moved_to_edge (Axis a, Direction d, Stencil const &s, Real padding,
- Real minimum) const
+Stencil::moved_to_edge (Axis a, Direction d, Stencil const &s,
+ Real padding, Real minimum) const
{
- Interval my_extent= dim_[a];
-
-
+ Interval my_extent = dim_[a];
Interval i (s.extent (a));
Real his_extent;
if (i.is_empty ())
else
his_extent = i[-d];
- Real offset = (my_extent. is_empty () ? 0.0 : my_extent[d] - his_extent)
+ Real offset = (my_extent.is_empty () ? 0.0 : my_extent[d] - his_extent)
+ d * padding;
Stencil toadd (s);
toadd.translate_axis (offset,a);
- if (minimum > 0
- && d *(- origin ()[a] + toadd.origin ()[a]) < minimum)
+ if (minimum > 0 && d * (-origin ()[a] + toadd.origin ()[a]) < minimum)
toadd.translate_axis ( -toadd.origin ()[a]
- + origin ()[a] + d* minimum, a);
-
+ + origin ()[a] + d * minimum, a);
+
return toadd;
}
add_stencil (moved_to_edge (a, d, s, padding, minimum));
}
-/* Hmm... maybe this is not such a good idea ; stuff can be empty,
- while expr_ == '() */
-bool
-Stencil::is_empty () const
+
+/****************************************************************/
+
+
+void
+interpret_stencil_expression (SCM expr,
+ void (*func) (void*, SCM),
+ void *func_arg,
+ Offset o)
{
- return expr_ == SCM_EOL;
+ while (1)
+ {
+ if (!ly_c_pair_p (expr))
+ return;
+
+ SCM head = ly_car (expr);
+
+ if (head == ly_symbol2scm ("translate-stencil"))
+ {
+ o += ly_scm2offset (ly_cadr (expr));
+ expr = ly_caddr (expr);
+ }
+ else if (head == ly_symbol2scm ("combine-stencil"))
+ {
+ for (SCM x = ly_cdr (expr); ly_c_pair_p (x); x = ly_cdr (x))
+ interpret_stencil_expression (ly_car (x), func, func_arg, o);
+ return;
+ }
+ else if (head == ly_symbol2scm ("grob-cause"))
+ {
+ SCM grob = ly_cadr (expr);
+
+ (*func) (func_arg, scm_list_2 (head, grob));
+ interpret_stencil_expression (ly_caddr (expr), func, func_arg, o);
+ (*func) (func_arg, scm_list_1 (ly_symbol2scm ("no-origin")));
+
+ 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 (ly_car (x) == ly_symbol2scm ("placebox"))
+ {
+ SCM args = ly_cdr (x);
+ SCM what = ly_caddr (args);
+
+ if (ly_c_pair_p (what))
+ {
+ SCM head = ly_car (what);
+ if (ly_symbol2scm ("text") == head)
+ me->fonts_ = scm_cons (ly_cadr (what), me->fonts_);
+ else if (head == ly_symbol2scm ("char"))
+ me->fonts_ = scm_cons (ly_cadr (what), me->fonts_);
+ }
+ }
}
SCM
-Stencil::get_expr () const
+find_expression_fonts (SCM expr)
{
- return expr_;
+ Font_list fl;
+
+ fl.fonts_ = SCM_EOL;
+
+ interpret_stencil_expression (expr, &find_font_function,
+ (void*) &fl, Offset (0,0));
+
+ return fl.fonts_;
}
-Box
-Stencil::extent_box () const
+
+LY_DEFINE (ly_stencil_fonts, "ly:stencil-fonts",
+ 1, 0, 0, (SCM s),
+ " Analyse @var{s}, and return a list of fonts used in @var{s}.")
{
- return dim_;
+ Stencil *stil = unsmob_stencil (s);
+ SCM_ASSERT_TYPE (stil, s, SCM_ARG1, __FUNCTION__, "Stencil");
+ return find_expression_fonts (stil->expr ());
+}
+
+struct Stencil_interpret_arguments
+{
+ SCM func;
+ SCM arg1;
+};
+
+void stencil_interpret_in_scm (void *p, SCM expr)
+{
+ Stencil_interpret_arguments *ap = (Stencil_interpret_arguments*) p;
+ scm_call_2 (ap->func, ap->arg1, expr);
+}
+
+
+
+LY_DEFINE (ly_interpret_stencil_expression, "ly:interpret-stencil-expression",
+ 4, 0, 0, (SCM expr, SCM func, SCM arg1, SCM offset),
+ "Parse EXPR, feed bits to FUNC with first arg ARG1")
+{
+ SCM_ASSERT_TYPE (ly_c_procedure_p(func), func, SCM_ARG1, __FUNCTION__,
+ "procedure");
+
+ Stencil_interpret_arguments a;
+ a.func = func;
+ a.arg1 = arg1;
+ Offset o = ly_scm2offset (offset);
+
+ interpret_stencil_expression (expr, stencil_interpret_in_scm, (void*) &a, o);
+
+ return SCM_UNSPECIFIED;
}