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break-align-engraver.cc -- implement Break_align_engraver
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break-align-engraver.cc -- implement Break_align_engraver
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source file of the GNU LilyPond music typesetter
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(c) 1999--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
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(c) 1999--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
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#include "engraver.hh"
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#include "protected-scm.hh"
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#include "break-align-interface.hh"
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#include "align-interface.hh"
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#include "axis-group-interface.hh"
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#include "translator-group.hh"
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#include "translator.icc"
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class Break_align_engraver : public Engraver
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Protected_scm column_alist_;
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void add_to_group (SCM,Item*);
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void add_to_group (SCM, Item *);
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virtual void finalize ();
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virtual void acknowledge_grob (Grob_info i);
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virtual void stop_translation_timestep ();
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void add_column (SCM);
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void stop_translation_timestep ();
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virtual void derived_mark () const;
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TRANSLATOR_DECLARATIONS (Break_align_engraver);
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DECLARE_ACKNOWLEDGER (break_aligned);
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Break_align_engraver::add_column (SCM smob)
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Grob * e = unsmob_grob (smob);
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Break_align_interface::add_element (align_,e);
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Break_align_engraver::finalize ()
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column_alist_ = SCM_EOL;
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Break_align_engraver::stop_translation_timestep ()
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for (SCM p = column_alist_; gh_pair_p (p); p = ly_cdr (p))
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SCM pair = ly_car (p);
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add_column (ly_cdr (pair));
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column_alist_ = SCM_EOL;
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typeset_grob (align_);
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typeset_grob (left_edge_);
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Break_align_engraver::Break_align_engraver ()
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column_alist_ = SCM_EOL;
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Break_align_engraver::acknowledge_grob (Grob_info inf)
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if (Item * item = dynamic_cast <Item *> (inf.grob_))
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Break_align_engraver::derived_mark () const
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scm_gc_mark (column_alist_);
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Break_align_engraver::acknowledge_break_aligned (Grob_info inf)
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if (Item *item = dynamic_cast<Item *> (inf.grob ()))
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Removed check for item->empty (X_AXIS). --hwn 20/1/04
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if (item->get_parent (X_AXIS))
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SCM bp=item->get_property ("breakable");
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SCM bp = item->get_property ("breakable");
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bool breakable = (to_boolean (bp));
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SCM align_name = item->get_property ("break-align-symbol");
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if (!gh_symbol_p (align_name))
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if (!scm_is_symbol (align_name))
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align_ = make_item ("BreakAlignment");
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announce_grob (align_, SCM_EOL);
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left_edge_ = make_item ("LeftEdge");
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add_to_group (left_edge_->get_property ("break-align-symbol"), left_edge_);
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announce_grob (left_edge_, SCM_EOL);
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align_ = make_item ("BreakAlignment", SCM_EOL);
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Context *origin = inf.origin_contexts (this)[0];
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Translator_group *tg = origin->implementation ();
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Engraver *random_source = dynamic_cast<Engraver *> (unsmob_translator (scm_car (tg->get_simple_trans_list ())));
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Make left edge appear to come from same context as clef/bar-line etc.
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left_edge_ = make_item_from_properties (random_source,
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ly_symbol2scm ("LeftEdge"),
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add_to_group (left_edge_->get_property ("break-align-symbol"),
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add_to_group (align_name, item);
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Break_align_engraver::add_to_group (SCM align_name, Item*item)
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Break_align_engraver::add_to_group (SCM align_name, Item *item)
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SCM s = scm_assoc (align_name, column_alist_);
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if (s != SCM_BOOL_F)
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Grob *e = unsmob_grob (ly_cdr (s));
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group = dynamic_cast<Item*> (e);
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Grob *e = unsmob_grob (scm_cdr (s));
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group = dynamic_cast<Item *> (e);
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group = make_item ("BreakAlignGroup");
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group = make_item ("BreakAlignGroup", item->self_scm ());
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group->set_property ("break-align-symbol", align_name);
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group->set_parent (align_, Y_AXIS);
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announce_grob (group, item->self_scm ());
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column_alist_ = scm_assoc_set_x (column_alist_, align_name, group->self_scm ());
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Break_align_interface::add_element (align_, group);
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Axis_group_interface::add_element (group, item);
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ENTER_DESCRIPTION (Break_align_engraver,
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/* descr */ "Align grobs with corresponding break-align-symbols into groups, and order the groups according to breakAlignOrder",
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/* creats*/ "BreakAlignment BreakAlignGroup LeftEdge",
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/* acks */ "break-aligned-interface"
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ADD_ACKNOWLEDGER (Break_align_engraver, break_aligned);
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ADD_TRANSLATOR (Break_align_engraver,
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"Align grobs with corresponding @code{break-align-symbols} into "
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"groups, and order the groups according to @code{breakAlignOrder}. "
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"The left edge of the alignment gets a separate group, with a symbol @code{left-edge}. ",
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/* create */ "BreakAlignment BreakAlignGroup LeftEdge",