X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fspan-bar.cc;h=0ee31140fac93d11e7d408f70f468ab429b59a01;hb=6b89a99dbfb2e208c42ba1510be9e638d21be4a9;hp=fe85a4e6b65761619778a9606405c3fe8da735de;hpb=2873636a53f0011f837aaf6e2072de602730d957;p=lilypond.git diff --git a/lily/span-bar.cc b/lily/span-bar.cc index fe85a4e6b6..0ee31140fa 100644 --- a/lily/span-bar.cc +++ b/lily/span-bar.cc @@ -3,128 +3,254 @@ source file of the GNU LilyPond music typesetter - (c) 1997--1999 Han-Wen Nienhuys + (c) 1997--2002 Han-Wen Nienhuys */ -#include "dimension-cache.hh" + #include "span-bar.hh" -#include "lookup.hh" +#include "font-interface.hh" #include "dimensions.hh" #include "paper-def.hh" #include "molecule.hh" -#include "align-element.hh" #include "warn.hh" +#include "axis-group-interface.hh" +#include "group-interface.hh" +#include "grob.hh" +#include "bar-line.hh" void -Span_bar::add_bar (Score_element*b) +Span_bar::add_bar (Grob*me, Grob*b) { - spanning_l_arr_.push (b); - add_dependency (b); -} + Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), b); -void -Span_bar::do_substitute_element_pointer (Score_element*o, Score_element*n) -{ - spanning_l_arr_.unordered_substitute (o, n); + me->add_dependency (b); } +MAKE_SCHEME_CALLBACK (Span_bar,brew_molecule,1); -Interval -Span_bar::do_width () const +/* + Limitations/Bugs: + + (1) Elements from 'me->get_grob_property ("elements")' must be + ordered according to their y coordinates relative to their common + axis group parent. Otherwise, the computation goes mad. + + (TODO: + apply a sort algorithm that ensures this precondition.) However, + until now, I have seen no case where lily has not fulfilled this + precondition. + + (2) This method depends on bar_engraver not being removed from + staff context. If bar_engraver is removed, the size of the staff + lines is evaluated as 0, which results in a solid span bar line + with faulty y coordinate. + */ + +/* + This routine was originally by Juergen Reuter, but it was a on the + bulky side. Rewritten by Han-Wen. + */ +SCM +Span_bar::brew_molecule (SCM smobbed_me) { - Molecule m = lookup_l ()->bar (type_str_, 40 PT, paper_l ()); + Grob *me = unsmob_grob (smobbed_me); + SCM first_elt = me->get_grob_property ("elements"); + + // compute common refpoint of elements + Grob *refp = me; + for (SCM elts = first_elt; gh_pair_p (elts); elts = ly_cdr (elts)) + { + SCM smobbed_staff_bar = ly_car (elts); + Grob *staff_bar = unsmob_grob (smobbed_staff_bar); + refp = staff_bar->common_refpoint (refp, Y_AXIS); + } + + Span_bar::evaluate_glyph(me); + SCM glyph = me->get_grob_property ("glyph"); + + /* + glyph may not be a string, when ME is killed by Hara Kiri in + between. + */ + if (!gh_string_p (glyph)) + return SCM_EOL; + + String glyph_str = ly_scm2string (glyph); + + // compose span_bar_mol + Molecule span_bar_mol; + + Interval prev_extent; + for (SCM elts = first_elt; gh_pair_p (elts); elts = ly_cdr (elts)) + { + SCM smobbed_staff_bar = ly_car (elts); + Grob *staff_bar = unsmob_grob (smobbed_staff_bar); + Interval ext = staff_bar->extent (refp, Y_AXIS); + if (ext.empty_b ()) + continue; + + if (!prev_extent.empty_b ()) + { + Interval l(prev_extent [UP], + ext[DOWN]); + + if (l.empty_b ()) + { + /* there is overlap between the bar lines. We do nothign here. + */ + } + else + { + Molecule interbar + = Bar_line::compound_barline (staff_bar, glyph_str, l.length()); + interbar.translate_axis (l.center (), Y_AXIS); + span_bar_mol.add_molecule (interbar); + } + } + prev_extent = ext; + } + + span_bar_mol.translate_axis (- me->relative_coordinate (refp, Y_AXIS), Y_AXIS); - return m.extent (X_AXIS); + return span_bar_mol.smobbed_copy (); } -void -Span_bar::do_pre_processing () +MAKE_SCHEME_CALLBACK (Span_bar,width_callback,2); +SCM +Span_bar::width_callback (SCM element_smob, SCM scm_axis) { - Bar::do_pre_processing (); - - evaluate_empty (); + Grob *se = unsmob_grob (element_smob); + Axis a = (Axis) gh_scm2int (scm_axis); + assert (a == X_AXIS); + String gl = ly_scm2string (se->get_grob_property ("glyph")); + + /* + urg. + */ + Molecule m = Bar_line::compound_barline (se, gl, 40 PT); - set_empty (false, Y_AXIS); // a hack to make mark scripts work. + return ly_interval2scm (m.extent (X_AXIS)); } -void -Span_bar::do_post_processing () +MAKE_SCHEME_CALLBACK (Span_bar,before_line_breaking,1); +SCM +Span_bar::before_line_breaking (SCM smob) { - Bar::do_post_processing (); - Interval i(get_spanned_interval ()); + evaluate_empty (unsmob_grob (smob)); + evaluate_glyph (unsmob_grob (smob)); - translate_axis (i.center (), Y_AXIS); + /* + no need to call Bar_line::before_line_breaking (), because the info + in ELEMENTS already has been procced by Bar_line::before_line_breaking (). + */ + return SCM_UNSPECIFIED; } -void -Span_bar::evaluate_empty () -{ - if (spanning_l_arr_.size () < 1) +MAKE_SCHEME_CALLBACK (Span_bar,center_on_spanned_callback,2); + +SCM +Span_bar::center_on_spanned_callback (SCM element_smob, SCM axis) +{ + Grob *me = unsmob_grob (element_smob); + Axis a = (Axis) gh_scm2int (axis); + assert (a == Y_AXIS); + Interval i (get_spanned_interval (me)); + + /* + Bar_line::brew_molecule delivers a barline of y-extent (-h/2,h/2), so + we have to translate ourselves to be in the center of the + interval that we span. */ + if (i.empty_b ()) { - set_elt_property ("transparent", SCM_BOOL_T); - set_empty (true, X_AXIS, Y_AXIS); + me->suicide (); + return gh_double2scm (0.0); + } + + return gh_double2scm (i.center ()); +} +void +Span_bar::evaluate_empty (Grob*me) +{ + /* + TODO: filter all hara-kiried out of ELEMENS list, and then + optionally do suicide. Call this cleanage function from + center_on_spanned_callback () as well. + + */ + if (!gh_pair_p (me->get_grob_property ("elements"))) + { + me->suicide (); } - if (type_str_.empty_b ()) +} + +void +Span_bar::evaluate_glyph (Grob*me) +{ + SCM elts = me->get_grob_property ("elements"); + SCM glyph_symbol = ly_symbol2scm ("glyph"); + SCM gl = SCM_EOL; + + while (gh_pair_p (elts)) { - set_elt_property ("transparent", SCM_BOOL_T); - set_empty (true); + gl = unsmob_grob (gh_car (elts))->internal_get_grob_property (glyph_symbol); + if (gh_string_p (gl)) + break; + elts =gh_cdr (elts); } - else if (type_str_ == "|:") + + if (!gh_string_p (gl)) { - type_str_ = ".|"; + me->suicide (); + return; } - else if (type_str_ == ":|") + + String type = ly_scm2string (gl); + if (type == "|:") { - type_str_ = "|."; + type = ".|"; } - else if (type_str_ == ":|:") + else if (type== ":|") { - type_str_ = ".|."; + type = "|."; } -} - -Interval -Span_bar::get_spanned_interval () const -{ - Interval y_int; - - for (int i=0; i < spanning_l_arr_.size (); i++) + else if (type== ":|:") { - Graphical_element*common = common_refpoint (spanning_l_arr_[i], Y_AXIS); - Real y = spanning_l_arr_[i]->relative_coordinate (common, Y_AXIS) - - relative_coordinate (common, Y_AXIS); - - y_int.unite (y + spanning_l_arr_[i]->extent(Y_AXIS)); + type = ".|."; } - return y_int; + + gl = ly_str02scm (type.ch_C ()); + if (scm_equal_p (me->internal_get_grob_property (glyph_symbol), gl) != SCM_BOOL_T) + me->internal_set_grob_property (glyph_symbol, gl); } Interval -Span_bar::do_height () const +Span_bar::get_spanned_interval (Grob*me) { - return get_spanned_interval (); + return ly_scm2interval (Axis_group_interface::group_extent_callback (me->self_scm (), gh_int2scm (Y_AXIS))); } -Molecule* -Span_bar::do_brew_molecule_p () const + +MAKE_SCHEME_CALLBACK (Span_bar,get_bar_size,1); +SCM +Span_bar::get_bar_size (SCM smob) { - Interval iv (get_spanned_interval ()); - Molecule*output = new Molecule; - if (!iv.empty_b()) - { - output->add_molecule (lookup_l ()->bar (type_str_, iv.length (), paper_l ())); - } - else + Grob* me = unsmob_grob (smob); + Interval iv (get_spanned_interval (me)); + if (iv.empty_b ()) { - programming_error("Huh? My children deflated (FIXME)"); + /* + This happens if the bars are hara-kiried from under us. + */ + me->suicide (); + return gh_double2scm (-1); } - return output; + return gh_double2scm (iv.length ()); } -Span_bar::Span_bar () -{ - type_str_ = ""; -} +ADD_INTERFACE (Span_bar,"span-bar-interface", + "A bar line that spans other barlines (typically used to get cross-staff barlines.", + ""); +