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]))
+ {
+ 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);
- Direction which_edge = LEFT;
- if (vsize (last_idx_found + 1) < elements.size ())
- last_idx_found ++;
- else
- which_edge = RIGHT;
-
- Grob *common = me->common_refpoint (elements[last_idx_found], X_AXIS);
+ 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);
+
+ return scm_from_double (alignment_parent->relative_coordinate (common, X_AXIS)
+ - me->relative_coordinate (common, X_AXIS)
+ + anchor);
+}
+
+MAKE_SCHEME_CALLBACK (Break_aligned_interface, calc_average_anchor, 1)
+SCM
+Break_aligned_interface::calc_average_anchor (SCM grob)
+{
+ Grob *me = unsmob_grob (grob);
+ Real avg = 0.0;
+ int count = 0;
+
+ /* average the anchors of those children that have it set */
+ extract_grob_set (me, "elements", elts);
+ for (vsize i = 0; i < elts.size (); i++)
+ {
+ SCM anchor = elts[i]->get_property ("break-align-anchor");
+ if (scm_is_number (anchor))
+ {
+ count++;
+ avg += scm_to_double (anchor);
+ }
+ }
- return scm_from_double (robust_relative_extent (elements[last_idx_found], common, X_AXIS)[which_edge]
- - me->relative_coordinate (common, X_AXIS));
+ return scm_from_double (count > 0 ? avg / count : 0);
+}
+
+MAKE_SCHEME_CALLBACK (Break_aligned_interface, calc_extent_aligned_anchor, 1)
+SCM
+Break_aligned_interface::calc_extent_aligned_anchor (SCM smob)
+{
+ 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 (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. ",
/* properties */
- "break-align-symbol "
+ "break-align-symbols "
)
"See [Wanske] page 126 -- 134, [Ross] pg 143 -- 147\n",
/* properties */
+ "break-align-anchor "
+ "break-align-anchor-alignment "
"break-align-symbol "
"space-alist "
);