(c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
+#include "stencil.hh"
+
#include <math.h>
+
#include <libc-extension.hh> // isinf
-#include "font-metric.hh"
+#include "input-smob.hh"
+#include "font-metric.hh"
#include "dimensions.hh"
-#include "interval.hh"
-#include "string.hh"
-#include "stencil.hh"
+#include "string-convert.hh"
#include "warn.hh"
-
#include "ly-smobs.icc"
+Stencil::Stencil ()
+{
+ expr_ = SCM_EOL;
+ set_empty (true);
+}
-SCM
-Stencil::smobbed_copy () const
+Stencil::Stencil (Box b, SCM func)
{
- Stencil *s = new Stencil (*this);
- return s->smobbed_self ();
+ expr_ = func;
+ dim_ = b;
}
-Offset
-Stencil::origin () const
+int
+Stencil::print_smob (SCM, SCM port, scm_print_state *)
{
- return origin_;
+ scm_puts ("#<Stencil ", port);
+ scm_puts (" >", port);
+ return 1;
}
+SCM
+Stencil::mark_smob (SCM smob)
+{
+ Stencil *s = (Stencil*) SCM_CELL_WORD_1 (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
Axis a = X_AXIS;
while (a < NO_AXES)
{
- if (abs (o[a]) > 100 CM
- || isinf (o[a]) || isnan (o[a]))
+ if (isinf (o[a]) || isnan (o[a]))
{
- programming_error ("Improbable offset for translation: setting to zero");
+ programming_error (String_convert::form_string ("Improbable offset for stencil: %f staff space", o[a])
+ + "\n"
+ + "Setting to zero.");
o[a] = 0.0;
}
incr (a);
}
expr_ = scm_list_n (ly_symbol2scm ("translate-stencil"),
- ly_offset2scm (o),
- expr_, SCM_UNDEFINED);
+ ly_offset2scm (o),
+ expr_, SCM_UNDEFINED);
if (!is_empty ())
dim_.translate (o);
origin_ += o;
}
-
+
void
Stencil::translate_axis (Real x, Axis a)
{
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_);
}
+
+
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);
}
-/*
- 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;
+ SCM_ASSERT_TYPE(0, SCM_EOL, SCM_ARG1, __FUNCTION__, "");
}
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
+
+/****************************************************************/
+
+
+void
+interpret_stencil_expression (SCM expr,
+ void (*func) (void*, SCM),
+ void *func_arg,
+ Offset o)
{
- return expr_ == SCM_EOL;
+ 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_2 (head, grob));
+ interpret_stencil_expression (scm_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 (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
-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 ());
}
-int
-Stencil::print_smob (SCM , SCM port, scm_print_state *)
+struct Stencil_interpret_arguments
{
- scm_puts ("#<Stencil ", port);
- scm_puts (" >", port);
- return 1;
+ 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);
}
-SCM
-Stencil::mark_smob (SCM s)
+
+
+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")
{
- Stencil *r = (Stencil *) ly_cdr (s);
- return r->expr_;
+ 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;
}
-IMPLEMENT_SIMPLE_SMOBS (Stencil);
-IMPLEMENT_TYPE_P (Stencil, "ly:stencil?");
-IMPLEMENT_DEFAULT_EQUAL_P (Stencil);
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