- if (i < elements.size ()
- && elements[i]->get_property ("break-align-symbol") == scm_car (s))
- {
- last_idx_found = i;
- i ++;
- }
-
- if (scm_car (s) == my_align)
- break ;
- }
-
- 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);
-
- return scm_from_double (robust_relative_extent (elements[last_idx_found], common, X_AXIS)[which_edge]
- - me->relative_coordinate (common, X_AXIS));
+ SCM sym = scm_car (symbol_list);
+ for (vsize i = 0; i < elements.size (); 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;
+ }
+ }
+ }
+
+found_break_aligned_grob:
+ if (break_aligned_grob == -1)
+ return scm_from_int (0);
+
+ 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 (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 if 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;