source file of the GNU LilyPond music typesetter
- (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
if (!Break_alignment_interface::has_interface (alignment))
return scm_from_int (0);
- SCM my_align = me->get_property ("break-align-symbol");
- SCM order = Break_alignment_interface::break_align_order (alignment);
-
+ SCM symbol_list = me->get_property ("break-align-symbols");
vector<Grob*> elements = Break_alignment_interface::ordered_elements (alignment);
if (elements.size () == 0)
return scm_from_int (0);
- int last_idx_found = -1;
- vsize i = 0;
- for (SCM s = order; scm_is_pair (s); s = scm_cdr (s))
+ int break_aligned_grob = -1;
+ for (; scm_is_pair (symbol_list); symbol_list = scm_cdr (symbol_list))
{
- if (i < elements.size ()
- && elements[i]->get_property ("break-align-symbol") == scm_car (s))
+ SCM sym = scm_car (symbol_list);
+ for (vsize i = 0; i < elements.size (); i++)
{
- last_idx_found = i;
- i ++;
+ if (elements[i]->get_property ("break-align-symbol") == sym)
+ {
+ if (Item::break_visible (elements[i])
+ && !elements[i]->extent (elements[i], X_AXIS).is_empty ())
+ {
+ break_aligned_grob = i;
+ goto found_break_aligned_grob; /* ugh. need to break out of 2 loops */
+ }
+ else if (break_aligned_grob == -1)
+ break_aligned_grob = i;
+ }
}
+ }
- if (scm_car (s) == my_align)
- break ;
- }
+found_break_aligned_grob:
+ if (break_aligned_grob == -1)
+ return scm_from_int (0);
- Grob *alignment_parent = elements[last_idx_found];
+ Grob *alignment_parent = elements[break_aligned_grob];
Grob *common = me->common_refpoint (alignment_parent, X_AXIS);
Real anchor = robust_scm2double (alignment_parent->get_property ("break-align-anchor"), 0);
{
Grob *me = unsmob_grob (smob);
Real alignment = robust_scm2double (me->get_property ("break-align-anchor-alignment"), 0.0);
+ Interval iv = me->extent (me, X_AXIS);
+
+ if (isinf (iv[LEFT]) && isinf (iv[RIGHT])) /* avoid NaN */
+ return scm_from_double (0.0);
- return scm_from_double (me->extent (me, X_AXIS).linear_combination (alignment));
+ return scm_from_double (iv.linear_combination (alignment));
+}
+
+MAKE_SCHEME_CALLBACK (Break_aligned_interface, calc_break_visibility, 1)
+SCM
+Break_aligned_interface::calc_break_visibility (SCM smob)
+{
+ /* a BreakAlignGroup is break-visible iff it has one element that is break-visible */
+ Grob *me = unsmob_grob (smob);
+ SCM ret = scm_c_make_vector (3, SCM_EOL);
+ extract_grob_set (me, "elements", elts);
+ for (int dir = 0; dir <= 2; dir++)
+ {
+ bool visible = false;
+ for (vsize i = 0; i < elts.size (); i++)
+ {
+ SCM vis = elts[i]->get_property ("break-visibility");
+ if (scm_is_vector (vis) && to_boolean (scm_c_vector_ref (vis, dir)))
+ visible = true;
+ }
+ scm_c_vector_set_x (ret, dir, scm_from_bool (visible));
+ }
+ return ret;
}
ADD_INTERFACE (Break_alignable_interface,
- "Object that is aligned on a break aligment. ",
+ "Object that is aligned on a break aligment.",
/* properties */
- "break-align-symbol "
- )
-
-
+ "break-align-symbols "
+ );
ADD_INTERFACE (Break_aligned_interface,
"Items that are aligned in prefatory matter.\n"
"\n"
- "The spacing of these items is controlled by the @code{space-alist}\n"
- "property. It contains a list @code{break-align-symbol}s with a specification\n"
- "of the associated space. The space specification can be "
+ "The spacing of these items is controlled by the"
+ " @code{space-alist} property. It contains a list"
+ " @code{break-align-symbol}s with a specification of the"
+ " associated space. The space specification can be\n"
+ "\n"
"@table @code\n"
"@item (minimum-space . @var{spc}))\n"
- " Pad space until the distance is @var{spc}\n"
+ "Pad space until the distance is @var{spc}.\n"
"@item (fixed-space . @var{spc})\n"
- " Set a fixed space\n"
+ "Set a fixed space.\n"
"@item (semi-fixed-space . @var{spc})\n"
- " Set a space. Half of it is fixed and half is stretchable. \n"
- "(does not work at start of line. fixme)\n"
+ "Set a space. Half of it is fixed and half is stretchable."
+ " (does not work at start of line. fixme)\n"
"@item (extra-space . @var{spc})\n"
- " Add @var{spc} amount of space.\n"
+ "Add @var{spc} amount of space.\n"
"@end table\n"
"\n"
- "Special keys for the alist are @code{first-note} and @code{next-note}, signifying\n"
- "the first note on a line, and the next note halfway a line.\n"
+ "Special keys for the alist are @code{first-note} and"
+ " @code{next-note}, signifying the first note on a line, and"
+ " the next note halfway a line.\n"
"\n"
- "Rules for this spacing are much more complicated than this. \n"
- "See [Wanske] page 126 -- 134, [Ross] pg 143 -- 147\n",
+ "Rules for this spacing are much more complicated than this."
+ " See [Wanske] page 126--134, [Ross] page 143--147.",
/* properties */
"break-align-anchor "
);
ADD_INTERFACE (Break_alignment_interface,
- "The object that performs break aligment. See @ref{break-aligned-interface}.",
+ "The object that performs break aligment. See"
+ " @ref{break-aligned-interface}.",
/* properties */
"positioning-done "
- "break-align-orders");
+ "break-align-orders "
+ );