X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fitem.cc;h=64d6c39637e2cf279a40f1825e2f96655c2b81a6;hb=ed463da03e0dd394c86ccd89fdea435b53b622b7;hp=e6798b5be1f70818077b7d2370ca7eb37ba137fe;hpb=07d4d05df6479d58c3c5152c07d7c86b94ee98b4;p=lilypond.git diff --git a/lily/item.cc b/lily/item.cc index e6798b5be1..64d6c39637 100644 --- a/lily/item.cc +++ b/lily/item.cc @@ -3,225 +3,227 @@ source file of the GNU LilyPond music typesetter - (c) 1997--1999 Han-Wen Nienhuys + (c) 1997--2003 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")); } -bool -Item::breakable_b () const +/** + 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) { - if (original_l_ ) - return false; - - Item * i =dynamic_cast (parent_l (X_AXIS)); - return (i) ? i->breakable_b () : get_elt_property( breakable_scm_sym) != SCM_BOOL_F; + broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0; } -void -Item::do_print() const + +bool +Item::breakable_b (Grob*me) { -} + if (me->original_) + return false; + if (!dynamic_cast (me)) + me->programming_error ("only items can be breakable."); + + Item * i =dynamic_cast (me->get_parent (X_AXIS)); + return (i) ? Item::breakable_b (i) : to_boolean (me->get_grob_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 { - Graphical_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 () { - if (broken_to_drul_[LEFT] || broken_to_drul_[RIGHT] - || !breakable_b ()) - return ; - 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); - try_visibility_lambda (); } -void -Item::try_visibility_lambda () -{ - SCM vis = remove_elt_property (visibility_lambda_scm_sym); - if (vis != SCM_BOOL_F) - { - SCM args = scm_listify (gh_int2scm (break_status_dir ()), SCM_UNDEFINED); - SCM result = gh_apply ( SCM_CDR(vis), args); - int trans = gh_scm2bool (gh_car (result)); - int empty = gh_scm2bool (gh_cdr (result)); - - if (empty) - set_empty (true, X_AXIS, Y_AXIS); - if (trans) - set_elt_property (transparent_scm_sym, SCM_BOOL_T); - } -} -void -Item::do_break () +bool +Item::broken_b () const { - copy_breakable_items(); - handle_prebroken_dependencies(); - - /* - Otherwise the broken items won't be pre_process()'ed. - */ - add_dependency (broken_to_drul_[LEFT]); - add_dependency (broken_to_drul_[RIGHT]); + return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT]; } + +/* + Generate items for begin and end-of line. + */ void -Item::do_breakable_col_processing() +Item::discretionary_processing () { - if (breakable_b ()) - do_break (); - else - try_visibility_lambda (); + if (broken_b ()) + return; + + if (Item::breakable_b (this)) + copy_breakable_items (); } -Item* -Item::find_prebroken_piece (Line_of_score*l) const + +Grob* +Item::find_broken_piece (System*l) const { - if (line_l() == l) - return (Item*)(this); - else if (broken_to_drul_[LEFT] && broken_to_drul_[LEFT]->line_l() == l) - return broken_to_drul_[LEFT]; - else if (broken_to_drul_[RIGHT] && broken_to_drul_[RIGHT]->line_l() == l) - return broken_to_drul_[RIGHT]; + 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); return 0; } + Item* Item::find_prebroken_piece (Direction d) const { + Item * me = (Item *) (this); if (!d) - return (Item *) (this); // ugh - else - return dynamic_cast (broken_to_drul_[d]); + return me; + 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) +Direction +Item::break_status_dir () const { - Paper_column *p1 = l->column_l (); - Paper_column* p2 = r->column_l (); - return p1->rank_i () - p2->rank_i (); -} + if (original_) + { + Item * i = dynamic_cast (original_); -Paper_column * -Item::column_l () const -{ - return dynamic_cast (parent_l (X_AXIS))->column_l (); + return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT; + } + else + return CENTER; } -Item::Item (Item const &s) - : Score_element (s) +void +Item::handle_prebroken_dependencies () { - broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0; -} + 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: -void -Item::handle_prebroken_dependents () -{ - Item * parent = dynamic_cast (parent_l (X_AXIS)); - if (breakable_b () && parent) + give the item to break-visibility itself, so the function can do + more complicated things. + */ + SCM vis = get_grob_property ("break-visibility"); + if (gh_procedure_p (vis)) { - if(!(broken_to_drul_[LEFT] || broken_to_drul_[RIGHT])) - do_break (); - - Direction d = LEFT; - do + SCM args = scm_list_n (gh_int2scm (break_status_dir ()), SCM_UNDEFINED); + SCM result = gh_apply (vis, args); + bool trans = gh_scm2bool (ly_car (result)); + bool empty = gh_scm2bool (ly_cdr (result)); + + if (empty && trans) + suicide (); + else if (empty) { - Item * broken_self = find_prebroken_piece (d); - Item * broken_parent = parent->find_prebroken_piece (d); - - broken_self->set_parent (broken_parent, X_AXIS); - - /* - ugh. Should do this is after breaking? - */ - if (!broken_self->parent_l (Y_AXIS)) - { - Score_element * yparent =dynamic_cast(parent_l (Y_AXIS)); - Item *yparenti = dynamic_cast (yparent); - Item *broken_yparent = yparenti ? - yparenti->find_prebroken_piece (d) : 0; - - if (!yparent) - programming_error ("Vertical refpoint lost!"); - else if (yparenti) - { - broken_self->set_parent (broken_yparent, Y_AXIS); - } - } + set_extent (SCM_EOL, X_AXIS); + set_extent (SCM_EOL, Y_AXIS); } - while ((flip (&d))!=LEFT); + else if (trans) + set_grob_property ("molecule-callback", SCM_EOL); } } -Direction -Item::break_status_dir () const +SCM +Item::do_derived_mark ()const { - if (original_l_) - { - Item * i = dynamic_cast (original_l_); - - return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT; - } - else - return CENTER; + 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")