X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fitem.cc;h=f857ff55917f038a80652eb9136da4d41ed5c1ab;hb=81d5f3ea5db5b76b81956c9504fd84dbbb51a060;hp=fc082e41669cb1e3d2c611e0ecc7090a9bc2b752;hpb=01d84d552854fb399bd0e819502c6c2db2a1b214;p=lilypond.git diff --git a/lily/item.cc b/lily/item.cc index fc082e4166..f857ff5591 100644 --- a/lily/item.cc +++ b/lily/item.cc @@ -3,138 +3,110 @@ 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 "paper-score.hh" -#include "debug.hh" +#include "warn.hh" #include "item.hh" #include "paper-column.hh" #include "spanner.hh" #include "lily-guile.hh" +#include "system.hh" +#include "group-interface.hh" -Item::Item () +Item::Item (SCM s) + : Grob (s) { broken_to_drul_[LEFT] = broken_to_drul_[RIGHT]=0; + Group_interface::add_thing (this, ly_symbol2scm ("interfaces"), ly_symbol2scm ("item-interface")); } +/** + 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) + : Grob (s) +{ + broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0; +} + + bool -Item::breakable_b () const +Item::is_breakable (Grob*me) { - if (original_l_ ) + if (me->original_) return false; + + if (!dynamic_cast (me)) + me->programming_error ("only items can be breakable."); - Item * i =dynamic_cast (parent_l (X_AXIS)); - return (i) ? i->breakable_b () : get_elt_property( "breakable") != SCM_UNDEFINED; + Item * i = dynamic_cast (me->get_parent (X_AXIS)); + return (i) ? Item::is_breakable (i) : to_boolean (me->get_property ("breakable")); } -Real -Item::hpos_f() const +Paper_column * +Item::get_column () const { - return relative_coordinate (0, X_AXIS); + Item *parent = dynamic_cast (get_parent (X_AXIS)); + return parent ? parent->get_column () : 0; } -Line_of_score * -Item::line_l() const +System * +Item::get_system () const { - Score_element *g = parent_l (X_AXIS); - if (!g) - return 0; - return dynamic_cast (g)-> line_l (); + Grob *g = get_parent (X_AXIS); + return g ? g->get_system () : 0; } void -Item::copy_breakable_items() +Item::copy_breakable_items () { Drul_array new_copies; Direction i=LEFT; do { - Score_element * dolly = clone(); - Item * item_p = dynamic_cast(dolly); - pscore_l_->typeset_element (item_p); - new_copies[i] =item_p; + Grob * dolly = clone (); + Item * item = dynamic_cast (dolly); + pscore_->system_->typeset_grob (item); + new_copies[i] =item; } - while (flip(&i) != LEFT); + while (flip (&i) != LEFT); broken_to_drul_= new_copies; - - do - { - broken_to_drul_[i]->handle_prebroken_dependencies(); - broken_to_drul_[i]->try_visibility_lambda(); - } - while (flip(&i) != LEFT); } -void -Item::try_visibility_lambda () -{ - SCM vis = remove_elt_property ("visibility-lambda"); - if (vis != SCM_UNDEFINED) - { - SCM args = scm_listify (gh_int2scm (break_status_dir ()), SCM_UNDEFINED); - SCM result = gh_apply (vis, args); - int trans = gh_scm2bool (gh_car (result)); - int empty = gh_scm2bool (gh_cdr (result)); - - if (empty) - { - set_empty (X_AXIS); - set_empty ( Y_AXIS); - } - if (trans) - set_elt_property ("transparent", SCM_BOOL_T); - } -} bool -Item::broken_b () const +Item::is_broken () const { return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT]; } + +/* + Generate items for begin and end-of line. + */ void -Item::do_break () +Item::discretionary_processing () { - if (broken_b ()) + if (is_broken ()) return; - if (breakable_b ()) - { - copy_breakable_items(); - handle_prebroken_dependencies(); - - /* - Otherwise the broken items won't be pre_process()'ed. - */ - - if (broken_to_drul_[LEFT]) - { - add_dependency (broken_to_drul_[LEFT]); - add_dependency (broken_to_drul_[RIGHT]); - } - } - try_visibility_lambda (); // ugh. -} - -void -Item::do_breakable_col_processing() -{ - do_break (); + if (Item::is_breakable (this)) + copy_breakable_items (); } -Score_element* -Item::find_broken_piece (Line_of_score*l) const +Grob* +Item::find_broken_piece (System*l) const { - if (line_l() == l) - return (Item*)(this); + if (get_system () == l) + return (Item*) (this); Direction d = LEFT; do { - Score_element *s = find_broken_piece (d); - if (s && s->line_l () == l) + Grob *s = broken_to_drul_[d]; + if (s && s->get_system () == l) return s; } while (flip (&d) != LEFT); @@ -142,58 +114,23 @@ Item::find_broken_piece (Line_of_score*l) const return 0; } + Item* -Item::find_broken_piece (Direction d) const +Item::find_prebroken_piece (Direction d) const { Item * me = (Item *) (this); if (!d) return me; - else - { - me->do_break (); - return dynamic_cast (broken_to_drul_[d]); - } + return dynamic_cast (broken_to_drul_[d]); } -void -Item::handle_prebroken_dependencies() -{ - if (original_l_) - Score_element::handle_prebroken_dependencies(); -} - -bool -Item::broken_original_b () const -{ - return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT]; -} - -int -Item::left_right_compare(Item const *l, Item const *r) -{ - Paper_column *p1 = l->column_l (); - Paper_column* p2 = r->column_l (); - return p1->rank_i () - p2->rank_i (); -} - -Paper_column * -Item::column_l () const -{ - return dynamic_cast (parent_l (X_AXIS))->column_l (); -} - -Item::Item (Item const &s) - : Score_element (s) -{ - broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0; -} Direction Item::break_status_dir () const { - if (original_l_) + if (original_) { - Item * i = dynamic_cast (original_l_); + Item * i = dynamic_cast (original_); return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT; } @@ -201,4 +138,92 @@ Item::break_status_dir () const return CENTER; } +void +Item::handle_prebroken_dependencies () +{ + Grob::handle_prebroken_dependencies (); + + /* + Can't do this earlier, because try_visibility_lambda () might set + the elt property transparent, which would then be copied. + TODO: + + give the item to break-visibility itself, so the function can do + more complicated things. + */ + SCM vis = get_property ("break-visibility"); + if (ly_c_procedure_p (vis)) + { + SCM args = scm_list_n (scm_int2num (break_status_dir ()), SCM_UNDEFINED); + SCM result = scm_apply_0 (vis, args); + bool trans = ly_scm2bool (ly_car (result)); + bool empty = ly_scm2bool (ly_cdr (result)); + + if (empty && trans) + suicide (); + else if (empty) + { + set_extent (SCM_EOL, X_AXIS); + set_extent (SCM_EOL, Y_AXIS); + } + else if (trans) + set_property ("print-function", SCM_EOL); + } +} + +SCM +Item::do_derived_mark ()const +{ + 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 ()); + return SCM_EOL; +} + +Item* +unsmob_item (SCM s ) +{ + return dynamic_cast (unsmob_grob (s)); +} + + + +ADD_INTERFACE (Item, + "item-interface", + "\n" + "\n" + "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" + "@end example\n" + , + "no-spacing-rods break-visibility breakable")