X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fitem.cc;h=df7a6c5c756ee3d3735c29a2ec913549c9f92db2;hb=163225c0cbb1055dfd3614615350ab9f3aaba74c;hp=4e995bfd775c9c5fd03bd8cab90d40cba06020f7;hpb=3c2f386f1385a10dafbb811be245f5a75d6b132c;p=lilypond.git diff --git a/lily/item.cc b/lily/item.cc index 4e995bfd77..df7a6c5c75 100644 --- a/lily/item.cc +++ b/lily/item.cc @@ -3,80 +3,90 @@ source file of the GNU LilyPond music typesetter - (c) 1997--2000 Han-Wen Nienhuys + (c) 1997--2004 Han-Wen Nienhuys */ +#include "item.hh" #include "paper-score.hh" -#include "debug.hh" -#include "item.hh" +#include "warn.hh" #include "paper-column.hh" -#include "spanner.hh" #include "lily-guile.hh" -#include "line-of-score.hh" +#include "system.hh" +#include "group-interface.hh" + +Grob * +Item::clone (int count) const +{ + return new Item (*this, count); +} -Item::Item (SCM s) - : Score_element (s) + +Item::Item (SCM s, Object_key const *key) + : Grob (s, key) { - broken_to_drul_[LEFT] = broken_to_drul_[RIGHT]=0; + 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) - : Score_element (s) +Item::Item (Item const &s, int copy_count) + : Grob (s, copy_count) { - broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0; + broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] = 0; } bool -Item::breakable_b (Score_element*me) +Item::is_breakable (Grob*me) { - if (me->original_l_) + if (me->original_) return false; - if (!dynamic_cast(me)) - programming_error ("only items can be breakable."); + if (!dynamic_cast (me)) + me->programming_error ("only items can be breakable."); - Item * i =dynamic_cast (me->parent_l (X_AXIS)); - return (i) ? Item::breakable_b (i) : to_boolean (me->get_elt_property ("breakable")); + Item * i = dynamic_cast (me->get_parent (X_AXIS)); + return (i) ? Item::is_breakable (i) : to_boolean (me->get_property ("breakable")); } Paper_column * -Item::column_l () const +Item::get_column () const { - return dynamic_cast (parent_l (X_AXIS))->column_l (); + 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); - return g ? g->line_l () : 0; + 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; + Direction i = LEFT; + int count = 0; do { - Score_element * dolly = clone(); - Item * item_p = dynamic_cast(dolly); - pscore_l_->line_l_->typeset_element (item_p); - new_copies[i] =item_p; + Grob * dolly = clone (count ++); + 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; } bool -Item::broken_b () const +Item::is_broken () const { return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT]; } @@ -86,25 +96,25 @@ Item::broken_b () const Generate items for begin and end-of line. */ void -Item::discretionary_processing() +Item::discretionary_processing () { - if (broken_b ()) + if (is_broken ()) return; - if (Item::breakable_b (this)) - copy_breakable_items(); + 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 = broken_to_drul_[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); @@ -126,9 +136,9 @@ Item::find_prebroken_piece (Direction d) const 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; } @@ -139,34 +149,89 @@ Item::break_status_dir () const void Item::handle_prebroken_dependencies () { - if (original_l_) - { - mutable_property_alist_ - = handle_broken_smobs (original_l_->mutable_property_alist_, - gh_int2scm (break_status_dir ())); - } + 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_elt_property ("visibility-lambda"); - if (gh_procedure_p (vis)) + SCM vis = get_property ("break-visibility"); + if (ly_c_procedure_p (vis)) { - SCM args = scm_listify (gh_int2scm (break_status_dir ()), SCM_UNDEFINED); - SCM result = gh_apply (vis, args); - bool trans = gh_scm2bool (gh_car (result)); - bool empty = gh_scm2bool (gh_cdr (result)); + SCM args = scm_list_n (scm_int2num (break_status_dir ()), SCM_UNDEFINED); + SCM result = scm_apply_0 (vis, args); + bool trans = ly_scm2bool (scm_car (result)); + bool empty = ly_scm2bool (scm_cdr (result)); if (empty && trans) suicide (); else if (empty) { - set_extent_callback (0, X_AXIS); - set_extent_callback (0, Y_AXIS); + set_extent (SCM_EOL, X_AXIS); + set_extent (SCM_EOL, Y_AXIS); } else if (trans) - set_elt_property ("molecule-callback", SCM_BOOL_T); + 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")