#include <math.h>
#include <libc-extension.hh> // isinf
+#include "input-smob.hh"
#include "font-metric.hh"
#include "dimensions.hh"
#include "interval.hh"
#include "ly-smobs.icc"
-SCM
-Stencil::smobbed_copy () const
+Stencil::Stencil ()
{
- Stencil *s = new Stencil (*this);
- return s->smobbed_self ();
+ expr_ = SCM_EOL;
+ set_empty (true);
}
-Offset
-Stencil::origin () const
+Stencil::Stencil (Box b, SCM func)
{
- return origin_;
+ expr_ = func;
+ dim_ = b;
}
+int
+Stencil::print_smob (SCM, SCM port, scm_print_state *)
+{
+ scm_puts ("#<Stencil ", port);
+ scm_puts (" >", port);
+ return 1;
+}
+
+SCM
+Stencil::mark_smob (SCM smob)
+{
+ Stencil *s = (Stencil*) ly_cdr (smob);
+ return s->expr_;
+}
+
+IMPLEMENT_SIMPLE_SMOBS (Stencil);
+IMPLEMENT_TYPE_P (Stencil, "ly:stencil?");
+IMPLEMENT_DEFAULT_EQUAL_P (Stencil);
+
Interval
Stencil::extent (Axis a) const
{
return dim_[a];
}
-Stencil::Stencil (Box b, SCM func)
+/* Hmm... maybe this is not such a good idea ; stuff can be empty,
+ while expr_ == '() */
+bool
+Stencil::is_empty () const
{
- expr_ = func;
- dim_ = b;
+ return expr_ == SCM_EOL;
}
-Stencil::Stencil ()
+SCM
+Stencil::expr () const
{
- expr_ = SCM_EOL;
- set_empty (true);
+ return expr_;
+}
+
+Box
+Stencil::extent_box () const
+{
+ return dim_;
+}
+Offset
+Stencil::origin () const
+{
+ return origin_;
}
void
void
Stencil::add_stencil (Stencil const &s)
{
- expr_ = scm_list_n (ly_symbol2scm ("combine-stencil"),
- s.expr_, expr_, SCM_UNDEFINED);
+ expr_ = scm_list_3 (ly_symbol2scm ("combine-stencil"), s.expr_, expr_);
dim_.unite (s.dim_);
}
translate_axis (-i.linear_combination (x), a);
}
-/*
- TODO: unintuitive naming, you would expect *this to be moved. Kept
- API for compat with add_at_edge ().
-*/
+/* FIXME: unintuitive naming, you would expect *this to be moved.
+ 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
{
- Real my_extent= is_empty () ? 0.0 : dim_[a][d];
+ Interval my_extent = dim_[a];
Interval i (s.extent (a));
Real his_extent;
if (i.is_empty ())
{
- programming_error ("Stencil::move_to_edge: adding empty stencil.");
+ programming_error ("Stencil::moved_to_edge: adding empty stencil.");
his_extent = 0.0;
}
else
his_extent = i[-d];
- Real offset = (my_extent - his_extent) + d * padding;
+ 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;
}
/* See scheme Function. */
void
Stencil::add_at_edge (Axis a, Direction d, Stencil const &s, Real padding,
- Real minimum)
+ Real minimum)
{
- add_stencil (moved_to_edge (a,d,s,padding, minimum));
+ 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
-{
- return expr_ == SCM_EOL;
-}
-SCM
-Stencil::get_expr () const
+/****************************************************************/
+
+void
+interpret_stencil_expression (SCM expr,
+ void (*func) (void*, SCM),
+ void *func_arg,
+ Offset o)
{
- return expr_;
+ while (1)
+ {
+ if (!ly_c_pair_p (expr))
+ return;
+
+ SCM head =ly_car (expr);
+ if (unsmob_input (head))
+ {
+ Input *ip = unsmob_input (head);
+ (*func)(func_arg,
+ scm_list_4 (ly_symbol2scm ("define-origin"),
+ scm_makfrom0str (ip->file_string ()
+ .to_str0 ()),
+ scm_int2num (ip->line_number ()),
+ scm_int2num (ip->column_number ())));
+
+ expr = ly_cadr (expr);
+ }
+ else if (head == ly_symbol2scm ("no-origin"))
+ {
+ (*func) (func_arg, scm_list_1 (head));
+ expr = ly_cadr (expr);
+ }
+ else if (head == ly_symbol2scm ("translate-stencil"))
+ {
+ o += ly_scm2offset (ly_cadr (expr));
+ expr = ly_caddr (expr);
+ }
+ else if (head == ly_symbol2scm ("combine-stencil"))
+ {
+ interpret_stencil_expression (ly_cadr (expr), func, func_arg, o);
+ expr = ly_caddr (expr);
+ }
+ else
+ {
+ (*func) (func_arg,
+ scm_list_4 (ly_symbol2scm ("placebox"),
+ scm_make_real (o[X_AXIS]),
+ scm_make_real (o[Y_AXIS]),
+ expr));
+ return;
+ }
+ }
}
-Box
-Stencil::extent_box () const
+
+struct Font_list
{
- return dim_;
-}
+ SCM fonts_;
+};
-int
-Stencil::print_smob (SCM , SCM port, scm_print_state *)
+static void
+find_font_function (void * fs, SCM x)
{
- scm_puts ("#<Stencil ", port);
- scm_puts (" >", port);
- return 1;
+ 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::mark_smob (SCM s)
+find_expression_fonts (SCM expr)
{
- Stencil *r = (Stencil *) ly_cdr (s);
- return r->expr_;
+ Font_list fl;
+
+ fl.fonts_ = SCM_EOL;
+
+ interpret_stencil_expression (expr, &find_font_function,
+ (void*) &fl, Offset (0,0));
+
+ return fl.fonts_;
}
-IMPLEMENT_SIMPLE_SMOBS (Stencil);
-IMPLEMENT_TYPE_P (Stencil, "ly:stencil?");
-IMPLEMENT_DEFAULT_EQUAL_P (Stencil);
+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}.")
+{
+ Stencil *stil =unsmob_stencil (s);
+ SCM_ASSERT_TYPE (stil, s, SCM_ARG1, __FUNCTION__, "Stencil");
+ return find_expression_fonts (stil->expr ());
+}
projects / lilypond.git / blobdiff