X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fitem.cc;h=d478d682e23ac07195c3af4e4e41408804d53ed7;hb=16daefb5104997473ab77fd00faf00f34c6baa7e;hp=78db9884e97fadeb4f5fb11877a222066c5cda81;hpb=55fa3168d0fb5326341ff56d7a1638c89eb2ebaf;p=lilypond.git diff --git a/lily/item.cc b/lily/item.cc index 78db9884e9..d478d682e2 100644 --- a/lily/item.cc +++ b/lily/item.cc @@ -3,195 +3,227 @@ source file of the GNU LilyPond music typesetter - (c) 1997--1998 Han-Wen Nienhuys + (c) 1997--2005 Han-Wen Nienhuys */ -#include "p-score.hh" -#include "debug.hh" #include "item.hh" -#include "p-col.hh" -// #include "elem-group.hh" -#include "spanner.hh" -Item::Item () +#include "paper-score.hh" +#include "warn.hh" +#include "paper-column.hh" +#include "lily-guile.hh" +#include "system.hh" +#include "group-interface.hh" + +Grob * +Item::clone (int count) const { - unbroken_original_l_ =0; - break_priority_i_ = 0; - breakable_b_ = false; - break_status_dir_ = CENTER; - broken_to_drul_[LEFT] = broken_to_drul_[RIGHT]=0; + return new Item (*this, count); } -IMPLEMENT_IS_TYPE_B1(Item, Score_element); - -void -Item::do_print() const +Item::Item (SCM s, Object_key const *key) + : Grob (s, key) { -#ifndef NPRINT - DOUT << "breakable_b_: " << breakable_b_ << - " break_status_dir_: " << break_status_dir_; -#endif + 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, int copy_count) + : Grob (s, copy_count) +{ + broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] = 0; +} -Real -Item::hpos_f() const +bool +Item::is_breakable (Grob *me) { - return absolute_coordinate (X_AXIS); + 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::is_breakable (i) : to_boolean (me->get_property ("breakable")); } -Line_of_score * -Item::line_l() const +Paper_column * +Item::get_column () const { - Graphical_axis_group *ga = axis_group_l_a_[X_AXIS]; - - if (!ga) - return 0; - - assert (ga->access_Score_element()); - return ga->access_Score_element ()-> line_l (); + Item *parent = dynamic_cast (get_parent (X_AXIS)); + return parent ? parent->get_column () : 0; } -Direction -Item::break_status_dir() const +System * +Item::get_system () const { - return break_status_dir_; + 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]) - return; Drul_array new_copies; - Direction i=LEFT; - do + Direction i = LEFT; + int count = 0; + do { - Item * item_p = clone()->access_Item (); - - item_p->break_status_dir_ = i; - pscore_l_->typeset_element (item_p); - item_p->handle_prebroken_dependencies(); - new_copies[i] =item_p; + Grob *dolly = clone (count++); + Item *item = dynamic_cast (dolly); + pscore_->root_system ()->typeset_grob (item); + new_copies[i] = item; } - while (flip(&i) != LEFT); - broken_to_drul_= new_copies; + while (flip (&i) != LEFT); + + broken_to_drul_ = new_copies; } -void -Item::do_breakable_col_processing() +bool +Item::is_broken () const { - if (!breakable_b_) - return; + return broken_to_drul_[LEFT] || broken_to_drul_[RIGHT]; +} - if (!column_l ()->breakable_b_) +/* + Generate items for begin and end-of line. +*/ +void +Item::discretionary_processing () +{ + if (is_broken ()) return; - 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]); + if (Item::is_breakable (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); - return 0; -} + Direction d = LEFT; + do + { + Grob *s = broken_to_drul_[d]; + if (s && s->get_system () == l) + return s; + } + while (flip (&d) != LEFT); -Item* -Item::find_prebroken_piece (Direction breakstatus) const -{ - if (!breakstatus) - return (Item *) this; // ugh - else - return (Item*) broken_to_drul_[breakstatus]; + return 0; } -void -Item::handle_prebroken_dependencies() +Item * +Item::find_prebroken_piece (Direction d) const { - if (breakable_b_) - Score_element::handle_prebroken_dependencies(); + Item *me = (Item *) (this); + if (!d) + return me; + return dynamic_cast (broken_to_drul_[d]); } -int -Item::left_right_compare(Item const *l, Item const *r) +Direction +Item::break_status_dir () const { - while (!l->is_type_b (Paper_column::static_name ())) - l = l->axis_group_l_a_[X_AXIS]->access_Score_element ()->access_Item (); - while (!r->is_type_b (Paper_column::static_name ())) - r = r->axis_group_l_a_[X_AXIS]->access_Score_element ()->access_Item (); - - Paper_column *p1 = (Paper_column*)l; - Paper_column* p2 = (Paper_column*)r; - return p1->rank_i () - p2->rank_i (); -} - + if (original_) + { + Item *i = dynamic_cast (original_); -bool -Item::linked_b() const -{ - return Score_element::linked_b() || attached_span_l_arr_.size(); + return (i->broken_to_drul_[LEFT] == this) ? LEFT : RIGHT; + } + else + return CENTER; } void -Item::do_junk_links() +Item::handle_prebroken_dependencies () { - attached_span_l_arr_.set_size(0); -} + Grob::handle_prebroken_dependencies (); -void -Item::do_unlink() -{ - Link_array attached=attached_span_l_arr_; - for (int i=0; i < attached.size (); i++) + /* + 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)) { - Spanner *s= attached[i]; - - Direction d= LEFT; - do { - if (s->spanned_drul_[d] == this) - s->set_bounds (d, 0); - if (unbroken_original_l_ - && unbroken_original_l_-> broken_to_drul_[d] == this) - unbroken_original_l_->broken_to_drul_[d] = 0; - } while (flip (&d) != LEFT); + 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 (SCM_EOL, X_AXIS); + set_extent (SCM_EOL, Y_AXIS); + } + else if (trans) + set_property ("print-function", SCM_EOL); } - assert (!attached_span_l_arr_.size ()); - unbroken_original_l_ =0; } -Paper_column * -Item::column_l () const -{ - return axis_group_l_a_[X_AXIS]->access_Score_element ()->access_Item ()->column_l (); -} - -Item::Item (Item const &s) - : Score_element (s) +SCM +Item::do_derived_mark () const { - unbroken_original_l_ = &s; - /* do not copy attached_span_l_arr_ */ - breakable_b_ = s.breakable_b_; - broken_to_drul_[LEFT] = broken_to_drul_[RIGHT] =0; - break_status_dir_ = s.break_status_dir_; - break_priority_i_ = s.break_priority_i_; + 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 * -Item::access_Item () -{ - return this; -} +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")