source file of the GNU LilyPond music typesetter
- (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
+#include "stencil.hh"
+
#include <math.h>
-#include <libc-extension.hh> // isinf
-#include "font-metric.hh"
#include "dimensions.hh"
-#include "interval.hh"
-#include "string.hh"
-#include "stencil.hh"
+#include "font-metric.hh"
+#include "input-smob.hh"
+#include "libc-extension.hh" // isinf
+#include "string-convert.hh"
#include "warn.hh"
#include "ly-smobs.icc"
SCM
Stencil::mark_smob (SCM smob)
{
- Stencil *s = (Stencil*) ly_cdr (smob);
+ Stencil *s = (Stencil *) SCM_CELL_WORD_1 (smob);
return s->expr_;
}
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
{
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])
+
+ // ugh, hardcoded.
+ || fabs (o[a]) > 1e6)
{
- programming_error ("Improbable offset for translation: setting to zero");
- o[a] = 0.0;
+ 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);
}
dim_.translate (o);
origin_ += o;
}
-
+
void
Stencil::translate_axis (Real x, Axis a)
{
- Offset o (0,0);
+ Offset o (0, 0);
o[a] = x;
translate (o);
}
}
else
{
- dim_[X_AXIS] = Interval (0,0);
- dim_[Y_AXIS] = Interval (0,0);
+ dim_[X_AXIS] = Interval (0, 0);
+ dim_[Y_AXIS] = Interval (0, 0);
}
}
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 ())
{
programming_error ("Stencil::moved_to_edge: adding empty stencil.");
his_extent = 0.0;
+ // SCM_ASSERT_TYPE (0, s.expr (), SCM_ARG1, __FUNCTION__, "non-empty stencil");
}
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);
+ toadd.translate_axis (offset, a);
+
+ if (minimum > 0 && d * (-origin ()[a] + toadd.origin ()[a]) < minimum)
+ toadd.translate_axis (-toadd.origin ()[a]
+ + origin ()[a] + d * minimum, a);
- if (minimum > 0
- && d *(- origin ()[a] + toadd.origin ()[a]) < minimum)
- toadd.translate_axis ( -toadd.origin ()[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 (!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;
+ }
+ }
}
-SCM
-Stencil::get_expr () const
+struct Font_list
{
- return expr_;
+ 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_);
+ }
+ }
}
-Box
-Stencil::extent_box () const
+SCM
+find_expression_fonts (SCM expr)
{
- return dim_;
+ Font_list fl;
+
+ fl.fonts_ = SCM_EOL;
+
+ interpret_stencil_expression (expr, &find_font_function,
+ (void *) & fl, Offset (0, 0));
+
+ return fl.fonts_;
}
+
projects / lilypond.git / blobdiff