-/*
- break-align-engraver.cc -- implement Break_align_engraver
-
+/*
+ break-align-engraver.cc -- implement Break_align_engraver
+
source file of the GNU LilyPond music typesetter
-
- (c) 1999--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 1999--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#include "engraver.hh"
#include "protected-scm.hh"
#include "break-align-interface.hh"
-#include "item.hh"
#include "align-interface.hh"
#include "axis-group-interface.hh"
+#include "context.hh"
+#include "translator-group.hh"
+#include "item.hh"
+#include "translator.icc"
class Break_align_engraver : public Engraver
{
Item *align_;
- Protected_scm column_alist_;
- Item *edge_;
+ SCM column_alist_;
+ Item *left_edge_;
- void add_to_group (SCM,Item*);
+ void add_to_group (SCM, Item *);
+ void create_alignment (Grob_info);
protected:
- virtual void finalize ();
- virtual void acknowledge_grob (Grob_info i);
- virtual void stop_translation_timestep ();
- void add_column (SCM);
-
+ void stop_translation_timestep ();
+ virtual void derived_mark () const;
public:
- TRANSLATOR_DECLARATIONS(Break_align_engraver);
+ TRANSLATOR_DECLARATIONS (Break_align_engraver);
+ DECLARE_ACKNOWLEDGER (break_aligned);
+ DECLARE_ACKNOWLEDGER (break_alignable);
};
void
-Break_align_engraver::add_column (SCM smob)
+Break_align_engraver::stop_translation_timestep ()
{
- Grob * e = unsmob_grob (smob);
- Break_align_interface::add_element (align_,e);
- typeset_grob (e);
+ column_alist_ = SCM_EOL;
+
+ align_ = 0;
+ left_edge_ = 0;
}
-void
-Break_align_engraver::finalize ()
+Break_align_engraver::Break_align_engraver ()
{
column_alist_ = SCM_EOL;
+ left_edge_ = 0;
+ align_ = 0;
}
void
-Break_align_engraver::stop_translation_timestep ()
+Break_align_engraver::derived_mark () const
{
- SCM order = get_property ("breakAlignOrder");
- for (; gh_pair_p (order); order = ly_cdr (order))
- {
- SCM p = scm_assoc (ly_car (order), column_alist_);
- if (gh_pair_p (p))
- {
- add_column (ly_cdr (p));
- column_alist_ = scm_assoc_remove_x (column_alist_, ly_car (order));
- }
- }
-
- for (SCM p = column_alist_; gh_pair_p (p); p = ly_cdr (p))
- {
- SCM pair = ly_car (p);
- add_column (ly_cdr (pair));
- }
-
-
- column_alist_ = SCM_EOL;
-
- if (align_)
- {
- typeset_grob (align_);
- align_ = 0;
- }
- if (edge_)
- {
- typeset_grob (edge_);
- edge_ = 0;
- }
+ scm_gc_mark (column_alist_);
}
-
-Break_align_engraver::Break_align_engraver ()
+void
+Break_align_engraver::acknowledge_break_alignable (Grob_info inf)
{
- column_alist_ = SCM_EOL;
- edge_ = 0;
- align_ = 0;
+ if (!align_)
+ create_alignment (inf);
+
+ Grob *g = inf.grob ();
+
+ if (!g->get_parent (X_AXIS))
+ g->set_parent (align_, X_AXIS);
}
void
-Break_align_engraver::acknowledge_grob (Grob_info inf)
+Break_align_engraver::acknowledge_break_aligned (Grob_info inf)
{
- if (Item * item = dynamic_cast <Item *> (inf.grob_))
+ if (Item *item = dynamic_cast<Item *> (inf.grob ()))
{
- if (item->empty_b (X_AXIS) || item->get_parent (X_AXIS))
+ /*
+ Removed check for item->empty (X_AXIS). --hwn 20/1/04
+ */
+ if (item->get_parent (X_AXIS))
return;
- SCM bp=item->get_grob_property ("breakable");
- bool breakable = (to_boolean (bp));
- if (!breakable)
- return ;
-
- SCM align_name = item->get_grob_property ("break-align-symbol");
- if (!gh_symbol_p (align_name))
- return ;
+ if (!Item::is_non_musical (item))
+ return;
+ SCM align_name = item->get_property ("break-align-symbol");
+ if (!scm_is_symbol (align_name))
+ return;
+
if (!align_)
- {
- align_ = new Item (get_property ("BreakAlignment"));
-
- announce_grob (align_, SCM_EOL);
+ create_alignment (inf);
- edge_ = new Item (get_property ("LeftEdge"));
- add_to_group (edge_->get_grob_property ("break-align-symbol"), edge_);
- announce_grob(edge_, SCM_EOL);
- }
-
add_to_group (align_name, item);
}
}
void
-Break_align_engraver::add_to_group(SCM align_name, Item*item)
+Break_align_engraver::create_alignment (Grob_info inf)
+{
+ align_ = make_item ("BreakAlignment", SCM_EOL);
+
+ Context *origin = inf.origin_contexts (this)[0];
+
+ Translator_group *tg = origin->implementation ();
+ Engraver *random_source = dynamic_cast<Engraver *> (unsmob_translator (scm_car (tg->get_simple_trans_list ())));
+ if (!random_source)
+ random_source = this;
+
+ /*
+ Make left edge appear to come from same context as clef/bar-line etc.
+ */
+ left_edge_ = random_source->make_item ("LeftEdge", SCM_EOL);
+ add_to_group (left_edge_->get_property ("break-align-symbol"),
+ left_edge_);
+}
+
+void
+Break_align_engraver::add_to_group (SCM align_name, Item *item)
{
SCM s = scm_assoc (align_name, column_alist_);
- Item * group = 0;
+ Item *group = 0;
if (s != SCM_BOOL_F)
{
- Grob *e = unsmob_grob (ly_cdr (s));
- group = dynamic_cast<Item*> (e);
+ Grob *e = unsmob_grob (scm_cdr (s));
+ group = dynamic_cast<Item *> (e);
}
else
{
- group = new Item (get_property ("BreakAlignGroup"));
+ group = make_item ("BreakAlignGroup", item->self_scm ());
- group->set_grob_property ("break-align-symbol", align_name);
+ group->set_property ("break-align-symbol", align_name);
group->set_parent (align_, Y_AXIS);
- announce_grob(group, item->self_scm());
-
+
column_alist_ = scm_assoc_set_x (column_alist_, align_name, group->self_scm ());
+ Break_alignment_interface::add_element (align_, group);
}
Axis_group_interface::add_element (group, item);
}
-ENTER_DESCRIPTION(Break_align_engraver,
-/* descr */ "Align grobs with corresponding break-align-symbols into groups, and order the groups according to breakAlignOrder",
-/* creats*/ "BreakAlignment BreakAlignGroup LeftEdge",
-/* accepts */ "",
-/* acks */ "break-aligned-interface"
-,/* reads */ "breakAlignOrder",
-/* write */ "");
+ADD_ACKNOWLEDGER (Break_align_engraver, break_aligned);
+ADD_ACKNOWLEDGER (Break_align_engraver, break_alignable);
+ADD_TRANSLATOR (Break_align_engraver,
+ /* doc */
+ "Align grobs with corresponding @code{break-align-symbols}"
+ " into groups, and order the groups according to"
+ " @code{breakAlignOrder}. The left edge of the alignment gets"
+ " a separate group, with a symbol @code{left-edge}.",
+
+ /* create */
+ "BreakAlignment "
+ "BreakAlignGroup "
+ "LeftEdge ",
+
+ /* read */
+ "",
+
+ /* write */
+ ""
+ );
projects / lilypond.git / blobdiff