X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Falign-interface.cc;h=59575bba43fdd4cd02bfd6525ce1d6b7b9a21907;hb=ed4aec0ae52d484fba091196e1869e7cfc0c1ad7;hp=7f31bb031488de805d3de237d7b8ee4dda366f2d;hpb=867530093ed5374d6e28d2c11a933f3b991c226e;p=lilypond.git diff --git a/lily/align-interface.cc b/lily/align-interface.cc index 7f31bb0314..59575bba43 100644 --- a/lily/align-interface.cc +++ b/lily/align-interface.cc @@ -1,167 +1,278 @@ -/* - align-interface.cc -- implement Align_interface - +/* + align-interface.cc -- implement Align_interface + source file of the GNU LilyPond music typesetter - - (c) 2000 Han-Wen Nienhuys - - */ + + (c) 2000--2005 Han-Wen Nienhuys +*/ #include "align-interface.hh" -#include "score-element.hh" -#include "group-interface.hh" + +#include "spanner.hh" +#include "item.hh" #include "axis-group-interface.hh" -#include "paper-def.hh" +#include "hara-kiri-group-spanner.hh" -/* - This callback is set in the children of the align element. It does - not compute anything, but a side effect of a->do_side_processing () - is that the elements are placed correctly. */ -MAKE_SCHEME_CALLBACK(Align_interface,alignment_callback,2); +MAKE_SCHEME_CALLBACK (Align_interface, alignment_callback, 2); SCM Align_interface::alignment_callback (SCM element_smob, SCM axis) { - Score_element * me = unsmob_element (element_smob); - Axis ax = (Axis )gh_scm2int (axis); - Score_element * par = me->parent_l (ax); - if (par && !to_boolean (par->get_elt_property ("alignment-done"))) + Grob *me = unsmob_grob (element_smob); + Axis ax = (Axis)scm_to_int (axis); + Grob *par = me->get_parent (ax); + if (par && !to_boolean (par->get_property ("positioning-done"))) + { + Align_interface::align_elements_to_extents (par, ax); + } + return scm_make_real (0.0); +} + +MAKE_SCHEME_CALLBACK (Align_interface, fixed_distance_alignment_callback, 2); +SCM +Align_interface::fixed_distance_alignment_callback (SCM element_smob, SCM axis) +{ + Grob *me = unsmob_grob (element_smob); + Axis ax = (Axis)scm_to_int (axis); + Grob *par = me->get_parent (ax); + if (par && !to_boolean (par->get_property ("positioning-done"))) { - Align_interface::do_side_processing (par, ax); + Align_interface::align_to_fixed_distance (par, ax); } - return gh_double2scm (0.0); + return scm_make_real (0.0); } +/* + merge with align-to-extents? +*/ +void +Align_interface::align_to_fixed_distance (Grob *me, Axis a) +{ + me->set_property ("positioning-done", SCM_BOOL_T); + + SCM d = me->get_property ("stacking-dir"); + + Direction stacking_dir = scm_is_number (d) ? to_dir (d) : CENTER; + if (!stacking_dir) + stacking_dir = DOWN; + + Real dy = robust_scm2double (me->get_property ("forced-distance"), 0.0); + + Link_array elems + = extract_grob_array (me, ly_symbol2scm ("elements")); + + Real where_f = 0; + + Interval v; + v.set_empty (); + Array translates; + + for (int j = elems.size (); j--;) + { + /* + This is not very elegant, in that we need special support for + hara-kiri. Unfortunately, the generic wiring of + force_hara_kiri_callback () (extent and offset callback) is + such that we might get into a loop if we call extent () or + offset () the elements. + + + */ + if (a == Y_AXIS + && Hara_kiri_group_spanner::has_interface (elems[j])) + Hara_kiri_group_spanner::consider_suicide (elems[j]); + + if (!elems[j]->is_live ()) + elems.del (j); + } + + for (int j = 0; j < elems.size (); j++) + { + where_f += stacking_dir * dy; + translates.push (where_f); + v.unite (Interval (where_f, where_f)); + } + + /* + TODO: support self-alignment-{Y, X} + */ + for (int 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 minimum-space and extra-space in its - children */ + 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 (). +*/ void -Align_interface::do_side_processing (Score_element * me, Axis a) +Align_interface::align_elements_to_extents (Grob *me, Axis a) { - me->set_elt_property ("alignment-done", SCM_BOOL_T); + Spanner *me_spanner = dynamic_cast (me); + if (a == Y_AXIS + && me_spanner + && me_spanner->get_bound (LEFT)->break_status_dir () == CENTER) + { + me_spanner->warning (_("vertical alignment called before line-breaking. Only do cross-staff spanners with PianoStaff.")); + } - SCM d = me->get_elt_property ("stacking-dir"); - Direction stacking_dir = gh_number_p(d) ? to_dir (d) : CENTER; + me->set_property ("positioning-done", SCM_BOOL_T); + + SCM d = me->get_property ("stacking-dir"); + + Direction stacking_dir = scm_is_number (d) ? to_dir (d) : CENTER; if (!stacking_dir) stacking_dir = DOWN; - + Interval threshold = robust_scm2interval (me->get_property ("threshold"), + Interval (0, Interval::infinity ())); + Array dims; - Link_array elems; - Link_array all_elts - = Pointer_group_interface__extract_elements ( me, (Score_element*) 0, "elements"); - for (int i=0; i < all_elts.size(); i++) + Link_array elems; + Link_array all_grobs + = extract_grob_array (me, ly_symbol2scm ("elements")); + for (int i = 0; i < all_grobs.size (); i++) { - Interval y = all_elts[i]->extent(me, a); - if (!y.empty_b()) + Interval y = all_grobs[i]->extent (me, a); + if (!y.is_empty ()) { - Score_element *e =dynamic_cast(all_elts[i]); - - // todo: fucks up if item both in Halign & Valign. - SCM min_dims = e->remove_elt_property ("minimum-space"); - if (gh_pair_p (min_dims) && - gh_number_p (gh_car (min_dims)) - && gh_number_p (gh_cdr (min_dims))) - { - y.unite (ly_scm2interval (min_dims)); - - } - - SCM extra_dims = e->remove_elt_property ("extra-space"); - if (gh_pair_p (extra_dims) && - gh_number_p (gh_car (extra_dims)) - && gh_number_p (gh_cdr (extra_dims))) - { - y[LEFT] += gh_scm2double (gh_car (extra_dims)); - y[RIGHT] += gh_scm2double (gh_cdr (extra_dims)); - } + Grob *e = dynamic_cast (all_grobs[i]); elems.push (e); - dims.push (y); + dims.push (y); } } - - Interval threshold = Interval (0, Interval::infinity ()); - SCM thr = me->get_elt_property ("threshold"); - if (gh_pair_p (thr)) + /* + 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. + */ + static SCM prop_syms[2]; + + if (!prop_syms[0]) { - Real ss = 1.0; - threshold[SMALLER] = ss *gh_scm2double (gh_car (thr)); - threshold[BIGGER] = ss * gh_scm2double (gh_cdr (thr)); + prop_syms[X_AXIS] = ly_symbol2scm ("self-alignment-X"); + prop_syms[Y_AXIS] = ly_symbol2scm ("self-alignment-Y"); } - Real where_f=0; - for (int j=0 ; j < elems.size(); j++) + SCM align (me->internal_get_property (prop_syms[a])); + + Array translates; + Interval total; + Real where_f = 0; + + for (int j = 0; j < elems.size (); j++) { - Real dy = - stacking_dir * dims[j][-stacking_dir]; + Real dy = -dims[j][-stacking_dir]; if (j) - dy += stacking_dir * dims[j-1][stacking_dir]; + dy += dims[j - 1][stacking_dir]; + /* + we want dy to be > 0 + */ + dy *= stacking_dir; if (j) { - dy = (dy >? threshold[SMALLER] ) - translate_axis (where_f, a); + total.unite (dims[j] + where_f); + translates.push (where_f); } -} + Real center_offset = 0.0; + /* + also move the grobs that were empty, to maintain spatial order. + */ + Array all_translates; + if (translates.size ()) + { + int i = 0; + int j = 0; + Real w = translates[0]; + while (j < all_grobs.size ()) + { + if (i < elems.size () && all_grobs[j] == elems[i]) + { + w = translates[i++]; + } + all_translates.push (w); + j++; + } + + /* + FIXME: uncommenting freaks out the Y-alignment of + line-of-score. + */ + if (scm_is_number (align)) + center_offset = total.linear_combination (scm_to_double (align)); + for (int j = 0; j < all_grobs.size (); j++) + all_grobs[j]->translate_axis (all_translates[j] - center_offset, a); + } +} Axis -Align_interface::axis (Score_element*me) +Align_interface::axis (Grob *me) { - return Axis (gh_scm2int (gh_car (me->get_elt_property ("axes")))); + return Axis (scm_to_int (scm_car (me->get_property ("axes")))); } - -/* - should use generic Scm funcs. - */ -int -Align_interface::get_count (Score_element*me,Score_element*s) +void +Align_interface::add_element (Grob *me, Grob *element, SCM call_back) { - SCM e = me->get_elt_property ("elements"); - int c =0; - while (gh_pair_p (e)) - { - if (gh_car (e) == s->self_scm ()) - break; - c++; - e = gh_cdr (e); - } - return c; + element->add_offset_callback (call_back, Align_interface::axis (me)); + Axis_group_interface::add_element (me, element); } void -Align_interface::add_element (Score_element*me,Score_element* s) +Align_interface::set_axis (Grob *me, Axis a) { - s->add_offset_callback (Align_interface::alignment_callback_proc, Align_interface::axis (me)); - Axis_group_interface::add_element (me, s); + Axis_group_interface::set_axes (me, a, a); } - -void -Align_interface::set_interface (Score_element*me) +/* + Find Y-axis parent of G that has a #'forced-distance property. This + has the effect of finding the piano-staff given an object in that + piano staff. +*/ +Grob * +find_fixed_alignment_parent (Grob *g) { - me->set_interface (ly_symbol2scm ("align-interface")); + while (g) + { + if (scm_is_number (g->get_property ("forced-distance"))) + return g; - Axis_group_interface::set_interface (me); -} + g = g->get_parent (Y_AXIS); + } -void -Align_interface::set_axis (Score_element*me,Axis a) -{ - Axis_group_interface::set_axes (me, a,a ); + return 0; } -bool -Align_interface::has_interface (Score_element*me) +ADD_INTERFACE (Align_interface, "align-interface", + "Order grobs from top to bottom, left to right, right to left or bottom" + "to top.", + "forced-distance stacking-dir align-dir threshold positioning-done " + "center-element elements axes"); + +struct Foobar { - return me && me->has_interface (ly_symbol2scm ("align-interface")); -} + bool has_interface (Grob *); +};