X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fspan-bar.cc;h=b6cb8361fc29adb698a2e0056179114bac2f20f2;hb=f47a52d0c0b6f0f2bc39708528ba9cec4882aaa2;hp=34c9f39ea1bc1f1da7e28f954fb03a2c33569ffc;hpb=9bc467a994787949def91708bf3bd50d088db982;p=lilypond.git diff --git a/lily/span-bar.cc b/lily/span-bar.cc index 34c9f39ea1..b6cb8361fc 100644 --- a/lily/span-bar.cc +++ b/lily/span-bar.cc @@ -3,133 +3,245 @@ source file of the GNU LilyPond music typesetter - (c) 1997--1999 Han-Wen Nienhuys + (c) 1997--2004 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 "output-def.hh" +#include "stencil.hh" #include "warn.hh" +#include "axis-group-interface.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,print,1); -Interval -Span_bar::width_callback (Dimension_cache const * c) +/* Limitations/Bugs: + + (1) Elements from 'me->get_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::print (SCM smobbed_me) { - Span_bar* s= dynamic_cast (c->element_l ()); - Molecule m = s->lookup_l ()->bar (s->type_str_, 40 PT, s->paper_l ()); + Grob *me = unsmob_grob (smobbed_me); + SCM first_elt = me->get_property ("elements"); + + /* compute common refpoint of elements */ + Grob *refp = me; + for (SCM elts = first_elt; scm_is_pair (elts); elts = scm_cdr (elts)) + { + SCM smobbed_staff_bar = scm_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_property ("glyph"); + + /* glyph may not be a string, when ME is killed by Hara Kiri in + between. */ + if (!scm_is_string (glyph)) + return SCM_EOL; - return m.extent (X_AXIS); + String glyph_string = ly_scm2string (glyph); + + /* compose span_bar_mol */ + Stencil span_bar_mol; + + Interval prev_extent; + for (SCM elts = first_elt; scm_is_pair (elts); elts = scm_cdr (elts)) + { + SCM smobbed_staff_bar = scm_car (elts); + Grob *staff_bar = unsmob_grob (smobbed_staff_bar); + Interval ext = staff_bar->extent (refp, Y_AXIS); + if (ext.is_empty ()) + continue; + + if (!prev_extent.is_empty ()) + { + Interval l (prev_extent [UP], + ext[DOWN]); + + if (l.is_empty ()) + { + /* There is overlap between the bar lines. Do nothing. */ + } + else + { + Stencil interbar = Bar_line::compound_barline (staff_bar, + glyph_string, + l.length ()); + interbar.translate_axis (l.center (), Y_AXIS); + span_bar_mol.add_stencil (interbar); + } + } + prev_extent = ext; + } + + span_bar_mol.translate_axis (- me->relative_coordinate (refp, Y_AXIS), + Y_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) scm_to_int (scm_axis); + assert (a == X_AXIS); + String gl = ly_scm2string (se->get_property ("glyph")); + + /* + urg. + */ + Stencil 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 ()); + Grob * g = unsmob_grob (smob); + evaluate_empty (g); + evaluate_glyph (g); + + /* 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; +} + +MAKE_SCHEME_CALLBACK (Span_bar,center_on_spanned_callback,2); - translate_axis (i.center (), Y_AXIS); +SCM +Span_bar::center_on_spanned_callback (SCM element_smob, SCM axis) +{ + Grob *me = unsmob_grob (element_smob); + Axis a = (Axis) scm_to_int (axis); + assert (a == Y_AXIS); + Interval i (get_spanned_interval (me)); + + /* Bar_line::print 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.is_empty ()) + { + me->suicide (); + return scm_make_real (0.0); + } + + return scm_make_real (i.center ()); } void -Span_bar::evaluate_empty () -{ - if (spanning_l_arr_.size () < 1) +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 (!scm_is_pair (me->get_property ("elements"))) { - set_elt_property ("transparent", SCM_BOOL_T); - set_empty (X_AXIS); - set_empty (Y_AXIS); + me->suicide (); } - if (type_str_.empty_b ()) +} + +void +Span_bar::evaluate_glyph (Grob*me) +{ + SCM gl = me->get_property ("glyph"); + + if (scm_is_string (gl)) + return ; + + for (SCM s = me->get_property ("elements"); + !scm_is_string (gl) && scm_is_pair (s); s = scm_cdr (s)) { - set_elt_property ("transparent", SCM_BOOL_T); - set_empty (X_AXIS); - set_empty (Y_AXIS); + gl = unsmob_grob (scm_car (s)) + ->get_property ("glyph"); } - else if (type_str_ == "|:") + + if (!scm_is_string (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 == ":|:") { - Score_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 = scm_makfrom0str (type.to_str0 ()); + if (scm_equal_p (me->get_property ("glyph"), gl) + != SCM_BOOL_T) + me->set_property ("glyph", gl); } Interval -Span_bar::height_callback (Dimension_cache const *c) +Span_bar::get_spanned_interval (Grob*me) { - Span_bar * s= dynamic_cast (c->element_l ()); - return s->get_spanned_interval (); + return ly_scm2interval (Axis_group_interface::group_extent_callback + (me->self_scm (), scm_int2num (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.is_empty ()) { - programming_error("Huh? My children deflated (FIXME)"); + /* This happens if the bars are hara-kiried from under us. */ + me->suicide (); + return scm_make_real (-1); } - return output; + return scm_make_real (iv.length ()); } -Span_bar::Span_bar () -{ - type_str_ = ""; - dim_cache_[X_AXIS]->set_callback (width_callback); - dim_cache_[Y_AXIS]->set_callback (height_callback); -} +ADD_INTERFACE (Span_bar,"span-bar-interface", + "A bar line that spanned between other barlines. This interface is " + " used for bar lines that connect different staves.", + "elements"); +