v.unite (Interval (where, where));
}
- /*
- TODO: support self-alignment-{Y, X}
- */
for (vsize i = 0; i < translates.size (); i++)
elems[i]->translate_axis (translates[i] - v.center (), a);
}
-/*
- Hairy function to put elements where they should be. Can be tweaked
- from the outside by setting extra-space in its
- children
-
- We assume that the children the refpoints of the children are still
- found at 0.0 -- we will fuck up with thresholds if children's
- extents are already moved to locations such as (-16, -8), since the
- dy needed to put things in a row doesn't relate to the distances
- between original refpoints.
-
- TODO: maybe we should rethink and throw out thresholding altogether.
- The original function has been taken over by
- align_to_fixed_distance ().
-*/
+/* for each grob, find its upper and lower skylines. If the grob has
+ an empty extent, delete it from the list instead. If the extent is
+ non-empty but there is no skyline available (or pure is true), just
+ create a flat skyline from the bounding box */
+static void
+get_skylines (Grob *me,
+ vector<Grob*> *const elements,
+ Axis a,
+ bool pure, int start, int end,
+ vector<Skyline_pair> *const ret)
+{
+ Grob *other_axis_common = common_refpoint_of_array (*elements, me, other_axis (a));
+ for (vsize i = elements->size (); i--;)
+ {
+ Grob *g = (*elements)[i];
+ Interval extent = g->maybe_pure_extent (g, a, pure, start, end);
+ Interval other_extent = pure ? Interval (-infinity_f, infinity_f)
+ : g->extent (other_axis_common, other_axis (a));
+ Box b = (a == X_AXIS) ? Box (extent, other_extent) : Box (other_extent, extent);
+
+ if (extent.is_empty ())
+ {
+ elements->erase (elements->begin () + i);
+ continue;
+ }
+
+ Skyline_pair skylines;
+ if (!pure
+ && Skyline_pair::unsmob (g->get_property ("skylines")))
+ skylines = *Skyline_pair::unsmob (g->get_property ("skylines"));
+ else
+ {
+ if (!pure)
+ programming_error ("no skylines for alignment-child\n");
+
+ skylines = Skyline_pair (b, 0, other_axis (a));
+ }
+
+ /* each skyline is calculated relative to (potentially) a different other_axis
+ coordinate. In order to compare the skylines effectively, we need to shift them
+ to some absolute reference point */
+ if (!pure)
+ {
+ /* this is perhaps an abuse of minimum-?-extent: maybe we should create
+ another property? But it seems that the only (current) use of
+ minimum-Y-extent is to separate vertically-aligned elements */
+ SCM min_extent = g->get_property (a == X_AXIS ? "minimum-X-extent" : "minimum-Y-extent");
+ if (is_number_pair (min_extent))
+ {
+ b[a] = ly_scm2interval (min_extent);
+ skylines.insert (b, 0, other_axis (a));
+ }
+ Real offset = g->relative_coordinate (other_axis_common, other_axis (a));
+ skylines.shift (-offset);
+ }
+
+
+ ret->push_back (skylines);
+ }
+ reverse (*ret);
+}
vector<Real>
Align_interface::get_extents_aligned_translates (Grob *me,
Direction stacking_dir = robust_scm2dir (me->get_property ("stacking-dir"),
DOWN);
- Interval threshold = robust_scm2interval (me->get_property ("threshold"),
- Interval (0, Interval::infinity ()));
+ vector<Grob*> elems (all_grobs); // writable copy
+ vector<Skyline_pair> skylines;
- vector<Interval> dims;
- vector<Grob*> elems;
+ get_skylines (me, &elems, a, pure, start, end, &skylines);
- for (vsize i = 0; i < all_grobs.size (); i++)
- {
- Interval y = all_grobs[i]->maybe_pure_extent (all_grobs[i], a, pure, start, end);
- if (!y.is_empty ())
- {
- Grob *e = dynamic_cast<Grob *> (all_grobs[i]);
-
- elems.push_back (e);
- dims.push_back (y);
- }
- }
-
- /*
- Read self-alignment-X and self-alignment-Y. This may seem like
- code duplication. (and really: it is), but this is necessary to
- prevent ugly cyclic dependencies that arise when you combine
- self-alignment on a child with alignment of children.
- */
- SCM align ((a == X_AXIS)
- ? me->get_property ("self-alignment-X")
- : me->get_property ("self-alignment-Y"));
-
- Interval total;
Real where = 0;
- Real extra_space = 0.0;
SCM extra_space_handle = scm_assq (ly_symbol2scm ("alignment-extra-space"), line_break_details);
+ Real extra_space = robust_scm2double (scm_is_pair (extra_space_handle)
+ ? scm_cdr (extra_space_handle)
+ : SCM_EOL,
+ 0.0);
- extra_space = robust_scm2double (scm_is_pair (extra_space_handle)
- ? scm_cdr (extra_space_handle)
- : SCM_EOL,
- extra_space);
-
- Real padding = robust_scm2double (me->get_property ("padding"),
- 0.0);
+ Real padding = robust_scm2double (me->get_property ("padding"), 0.0);
vector<Real> translates;
for (vsize j = 0; j < elems.size (); j++)
{
- Real dy = -dims[j][-stacking_dir];
- if (j)
- dy += dims[j - 1][stacking_dir];
-
- /*
- we want dy to be > 0
- */
- dy *= stacking_dir;
- if (j)
- dy = min (max (dy, threshold[SMALLER]), threshold[BIGGER]);
-
+ Real dy = 0;
+ if (j == 0)
+ dy = skylines[j][-stacking_dir].max_height ();
+ else
+ dy = skylines[j-1][stacking_dir].distance (skylines[j][-stacking_dir]);
where += stacking_dir * (dy + padding + extra_space / elems.size ());
- total.unite (dims[j] + where);
translates.push_back (where);
}
}
}
-
- Real center_offset = 0.0;
-
- /*
- also move the grobs that were empty, to maintain spatial order.
- */
vector<Real> all_translates;
- if (translates.size ())
+
+ if (!translates.empty ())
{
Real w = translates[0];
-
- if (scm_is_number (align))
- center_offset = total.linear_combination (scm_to_double (align));
-
for (vsize i = 0, j = 0; j < all_grobs.size (); j++)
{
if (i < elems.size () && all_grobs[j] == elems[i])
w = translates[i++];
- all_translates.push_back (w - center_offset);
+ all_translates.push_back (w);
}
}
return all_translates;
projects / lilypond.git / blobdiff