/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 1997--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Copyright (C) 1997--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
LilyPond is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
Stencil *s = unsmob_stencil (stil);
LY_ASSERT_SMOB (Stencil, stil, 1);
LY_ASSERT_TYPE (scm_is_number, amount, 2);
+
LY_ASSERT_TYPE (is_axis, axis, 3);
Real real_amount = scm_to_double (amount);
SCM new_s = s->smobbed_copy ();
+ scm_remember_upto_here_1 (stil);
+
Stencil *q = unsmob_stencil (new_s);
q->translate_axis (real_amount, Axis (scm_to_int (axis)));
return new_s;
Offset o = ly_scm2offset (offset);
SCM new_s = s->smobbed_copy ();
+ scm_remember_upto_here_1 (stil);
+
Stencil *q = unsmob_stencil (new_s);
q->translate (o);
return new_s;
}
LY_DEFINE (ly_stencil_empty_p, "ly:stencil-empty?",
- 1, 0, 0, (SCM stil),
- "Return whether @var{stil} is empty.")
+ 1, 1, 0, (SCM stil, SCM axis),
+ "Return whether @var{stil} is empty. If an optional"
+ " @var{axis} is supplied, the emptiness check is"
+ " restricted to that axis.")
{
Stencil *s = unsmob_stencil (stil);
LY_ASSERT_SMOB (Stencil, stil, 1);
- return scm_from_bool (s->is_empty ());
+ if (SCM_UNBNDP (axis))
+ return scm_from_bool (s->is_empty ());
+ LY_ASSERT_TYPE (is_axis, axis, 2);
+ return scm_from_bool (s->is_empty (Axis (scm_to_int (axis))));
}
LY_DEFINE (ly_stencil_combine_at_edge, "ly:stencil-combine-at-edge",
result.add_at_edge (Axis (scm_to_int (axis)),
Direction (scm_to_int (direction)), *s2, p);
+ scm_remember_upto_here_2 (first, second);
+
+ return result.smobbed_copy ();
+}
+
+LY_DEFINE (ly_stencil_stack, "ly:stencil-stack",
+ 4, 2, 0, (SCM first, SCM axis, SCM direction,
+ SCM second,
+ SCM padding,
+ SCM mindist),
+ "Construct a stencil by stacking @var{second} next to @var{first}."
+ " @var{axis} can be 0 (x-axis) or@tie{}1 (y-axis)."
+ " @var{direction} can be -1 (left or down) or@tie{}1 (right or"
+ " up). The stencils are juxtaposed with @var{padding} as extra"
+ " space. @var{first} and @var{second} may also be @code{'()} or"
+ " @code{#f}. As opposed to @code{ly:stencil-combine-at-edge},"
+ " metrics are suited for successively accumulating lines of"
+ " stencils. Also, @var{second} stencil is drawn last.\n\n"
+ "If @var{mindist} is specified, reference points are placed"
+ " apart at least by this distance. If either of the stencils"
+ " is spacing, @var{padding} and @var{mindist} do not apply.")
+{
+ Stencil *s1 = unsmob_stencil (first);
+ Stencil *s2 = unsmob_stencil (second);
+ Stencil result;
+
+ SCM_ASSERT_TYPE (s1 || first == SCM_BOOL_F || first == SCM_EOL,
+ first, SCM_ARG1, __FUNCTION__, "Stencil, #f or ()");
+ SCM_ASSERT_TYPE (s2 || second == SCM_BOOL_F || second == SCM_EOL,
+ second, SCM_ARG4, __FUNCTION__, "Stencil, #f or ()");
+ LY_ASSERT_TYPE (is_axis, axis, 2);
+ LY_ASSERT_TYPE (is_direction, direction, 3);
+
+ Real p = 0.0;
+ if (padding != SCM_UNDEFINED)
+ {
+ LY_ASSERT_TYPE (scm_is_number, padding, 5);
+ p = scm_to_double (padding);
+ }
+ Real d = -infinity_f;
+ if (!SCM_UNBNDP (mindist))
+ {
+ LY_ASSERT_TYPE (scm_is_number, mindist, 6);
+ d = scm_to_double (mindist);
+ }
+
+ if (s1)
+ result = *s1;
+
+ if (s2)
+ result.stack (Axis (scm_to_int (axis)),
+ Direction (scm_to_int (direction)), *s2, p, d);
+
+ scm_remember_upto_here_2 (first, second);
+
return result.smobbed_copy ();
}
SCM_VALIDATE_REST_ARGUMENT (args);
SCM expr = SCM_EOL;
- SCM *tail = &expr;
+ SCM cs = ly_symbol2scm ("combine-stencil");
+
Box extent;
extent.set_empty ();
SCM_ASSERT_TYPE (s, scm_car (args), SCM_ARGn, __FUNCTION__, "Stencil");
extent.unite (s->extent_box ());
- *tail = scm_cons (s->expr (), SCM_EOL);
- tail = SCM_CDRLOC (*tail);
+ if (scm_is_pair (s->expr ()) && scm_is_eq (cs, s->expr ()))
+ {
+ expr = scm_reverse_x (scm_list_copy (scm_cdr (s->expr ())),
+ expr);
+ }
+ else
+ expr = scm_cons (s->expr (), expr);
+
args = scm_cdr (args);
}
- expr = scm_cons (ly_symbol2scm ("combine-stencil"), expr);
+ expr = scm_cons (cs, scm_reverse_x (expr, SCM_EOL));
return Stencil (extent, expr).smobbed_copy ();
}
"@item\n"
"The vertical and horizontal extents of the object, given as"
" pairs. If an extent is unspecified (or if you use"
- " @code{(1000 . -1000)} as its value), it is taken to be empty.\n"
+ " @code{empty-interval} as its value), it is taken to be empty.\n"
"@end enumerate\n")
{
SCM_ASSERT_TYPE (!scm_is_pair (expr)
SCM arg1;
};
-void stencil_interpret_in_scm (void *p, SCM expr)
+SCM stencil_interpret_in_scm (void *p, SCM expr)
{
Stencil_interpret_arguments *ap = (Stencil_interpret_arguments *) p;
- scm_call_2 (ap->func, ap->arg1, expr);
+ return scm_call_2 (ap->func, ap->arg1, expr);
}
LY_DEFINE (ly_interpret_stencil_expression, "ly:interpret-stencil-expression",
LY_DEFINE (ly_stencil_rotate, "ly:stencil-rotate",
4, 0, 0, (SCM stil, SCM angle, SCM x, SCM y),
"Return a stencil @var{stil} rotated @var{angle} degrees around"
- " the relative offset (@var{x}, @var{y}). E.g. an offset of"
+ " the relative offset (@var{x}, @var{y}). E.g., an offset of"
" (-1, 1) will rotate the stencil around the left upper corner.")
{
Stencil *s = unsmob_stencil (stil);
projects / lilypond.git / blobdiff