X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;ds=sidebyside;f=lily%2Fitem.cc;h=173df20ed87fd7b19451d2f4b212ea9c0dc18eea;hb=c44e6e55681395d4ae4d59807aeab0b136d933bc;hp=ab0290db9f4fd2f5e61aff3024152212f3abf7c4;hpb=6ce61146edb1c36647b514778c29cdc9beedab6a;p=lilypond.git diff --git a/lily/item.cc b/lily/item.cc index ab0290db9f..173df20ed8 100644 --- a/lily/item.cc +++ b/lily/item.cc @@ -3,107 +3,235 @@ source file of the GNU LilyPond music typesetter - (c) 1997 Han-Wen Nienhuys + (c) 1997--2006 Han-Wen Nienhuys */ -#include "p-score.hh" -#include "debug.hh" + #include "item.hh" -#include "p-col.hh" -Item::Item() +#include "axis-group-interface.hh" +#include "paper-score.hh" +#include "warn.hh" +#include "paper-column.hh" +#include "lily-guile.hh" +#include "system.hh" +#include "pointer-group-interface.hh" + +Grob * +Item::clone (int count) const { - pcol_l_ = 0; + return new Item (*this, count); +} - broken_to_a_[0] - = broken_to_a_[1]=0; +Item::Item (SCM s, Object_key const *key) + : Grob (s, key) +{ + broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] = 0; } -IMPLEMENT_STATIC_NAME(Item); -IMPLEMENT_IS_TYPE_B1(Item, Score_elem); +/** + Item copy ctor. Copy nothing: everything should be a elt property + or a special purpose pointer (such as broken_to_drul_[]) */ +Item::Item (Item const &s, int copy_count) + : Grob (s, copy_count) +{ + broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] = 0; +} -void -Item::do_print() const +bool +Item::is_non_musical (Grob *me) { -#ifndef NPRINT - mtor << "(unknown)"; -#endif + if (me->original ()) + return false; + + Item *i = dynamic_cast (me->get_parent (X_AXIS)); + return i ? Item::is_non_musical (i) : to_boolean (me->get_property ("non-musical")); } +Paper_column * +Item::get_column () const +{ + Item *parent = dynamic_cast (get_parent (X_AXIS)); + return parent ? parent->get_column () : 0; +} -Real -Item::hpos_f()const +System * +Item::get_system () const { - return pcol_l_->hpos_f_ + offset().x; + Grob *g = get_parent (X_AXIS); + return g ? g->get_system () : 0; } +void +Item::copy_breakable_items () +{ + Drul_array new_copies; + Direction i = LEFT; + int count = 0; + do + { + Grob *dolly = clone (count++); + Item *item = dynamic_cast (dolly); + get_root_system (this)->typeset_grob (item); + new_copies[i] = item; + } + while (flip (&i) != LEFT); + broken_to_drul_ = new_copies; +} -Line_of_score * -Item::line_l()const +bool +Item::is_broken () const { - return pcol_l_->line_l_; + return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT]; } -int -Item::break_status_i() const +/* + Generate items for begin and end-of line. +*/ +void +Item::discretionary_processing () { - PCol * c = pcol_l_; - if (c->breakable_b()) - return 0; - else if (!c->daddy_l_) - return 0; - else if (c == c->daddy_l_->prebreak_p_) - return -1; - else - return 1; + if (is_broken ()) + return; + + if (Item::is_non_musical (this)) + copy_breakable_items (); } -void -Item::do_breakable_col_processing() -{ - PCol * c = pcol_l_; - if (!c->breakable_b()) - return; - - for (int i=0; i < 2; i++) { - broken_to_a_[i] = clone()->item(); - pscore_l_->typeset_item(broken_to_a_[i], c, -1+ 2*i); - broken_to_a_[i]->handle_prebroken_dependencies(); +Grob * +Item::find_broken_piece (System *l) const +{ + if (get_system () == l) + return (Item *) (this); + + Direction d = LEFT; + do + { + Grob *s = broken_to_drul_[d]; + if (s && s->get_system () == l) + return s; } + while (flip (&d) != LEFT); - handle_prebroken_dependencies(); + return 0; +} + +Item * +Item::find_prebroken_piece (Direction d) const +{ + Item *me = (Item *) (this); + if (!d) + return me; + return dynamic_cast (broken_to_drul_[d]); } -Item* -Item::find_prebroken_piece(Line_of_score*l) const +Direction +Item::break_status_dir () const { - if (line_l() == l) - return this; - else if (broken_to_a_[0] && broken_to_a_[0]->line_l() == l) - return broken_to_a_[0]; - else if (broken_to_a_[1] && broken_to_a_[1]->line_l() == l) - return broken_to_a_[1]; + if (original ()) + { + Item *i = dynamic_cast (original ()); - return 0; + return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT; + } + else + return CENTER; } -Item* -Item::find_prebroken_piece(PCol*c)const +void +Item::handle_prebroken_dependencies () { - if (c == pcol_l_ ) - return (Item *) this; // ugh + Grob::handle_prebroken_dependencies (); + + /* + Can't do this earlier, because try_visibility_lambda () might set + the elt property transparent, which would then be copied. + */ + SCM vis = get_property ("break-visibility"); + if (scm_is_vector (vis)) + { + bool visible = to_boolean (scm_c_vector_ref (vis, break_status_dir () + 1)); + + if (!visible) + suicide (); + } +} - if (c == pcol_l_->prebreak_p_) - return (Item *) broken_to_a_[0]; - else if (c==pcol_l_->postbreak_p_) - return (Item *)broken_to_a_[1]; +bool +Item::pure_is_visible (int start, int end) const +{ + SCM vis = get_property ("break-visibility"); + if (scm_is_vector (vis)) + { + int pos = 1; + int pc_rank = Paper_column::get_rank (get_column ()); + if (pc_rank == start) + pos = 2; + else if (pc_rank == end) + pos = 0; + return to_boolean (scm_vector_ref (vis, scm_from_int (pos))); + } + return true; +} - assert(false); +Interval_t +Item::spanned_rank_iv () +{ + int c = get_column ()->get_rank (); + return Interval_t (c, c); } void -Item::handle_prebroken_dependencies() +Item::derived_mark () const { - if ( pcol_l_->breakable_b() || pcol_l_->daddy_l_ ) - Score_elem::handle_prebroken_dependencies(); + if (broken_to_drul_[LEFT]) + scm_gc_mark (broken_to_drul_[LEFT]->self_scm ()); + if (broken_to_drul_[RIGHT]) + scm_gc_mark (broken_to_drul_[RIGHT]->self_scm ()); } + +Item * +unsmob_item (SCM s) +{ + return dynamic_cast (unsmob_grob (s)); +} + +ADD_INTERFACE (Item, + + "Grobs can be distinguished in their role in the horizontal spacing.\n" + "Many grobs define constraints on the spacing by their sizes. For\n" + "example, note heads, clefs, stems, and all other symbols with a fixed\n" + "shape. These grobs form a subtype called @code{Item}.\n" + "\n" + "\n" + "Some items need special treatment for line breaking. For example, a\n" + "clef is normally only printed at the start of a line (i.e. after a\n" + "line break). To model this, `breakable' items (clef, key signature,\n" + "bar lines, etc.) are copied twice. Then we have three versions of each\n" + "breakable item: one version if there is no line break, one version\n" + "that is printed before the line break (at the end of a system), one\n" + "version that is printed after the line break.\n" + "\n" + "Whether these versions are visible and take up space, is determined by\n" + "the outcome of the @code{break-visibility}. This grob property is a\n" + "function taking a direction (-1, 0 or 1) as argument. It returns a\n" + "cons of booleans, signifying whether this grob should be transparent\n" + "and have no extent.\n" + "\n" + "The following variables for break-visibility are predefined:\n" + "@example\n" + " grob will show: before no after\n" + " break break break\n" + " all-invisible no no no\n" + " begin-of-line-visible no no yes\n" + " end-of-line-visible yes no no\n" + " all-visible yes yes yes\n" + " begin-of-line-invisible yes yes no\n" + " end-of-line-invisible no yes yes\n" + " center-invisible yes no yes\n" + "@end example\n", + + /* properties */ + "break-visibility " + "no-spacing-rods " + "non-musical")