-/*
- 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--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 1999--2005 Han-Wen Nienhuys <hanwen@cs.uu.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"
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 *);
protected:
- virtual void finalize ();
virtual void acknowledge_grob (Grob_info i);
virtual void stop_translation_timestep ();
+ virtual void derived_mark () const;
void add_column (SCM);
-
+
public:
- TRANSLATOR_DECLARATIONS(Break_align_engraver);
+ TRANSLATOR_DECLARATIONS (Break_align_engraver);
};
void
Break_align_engraver::add_column (SCM smob)
{
- Grob * e = unsmob_grob (smob);
- Break_align_interface::add_element (align_,e);
- typeset_grob (e);
-}
-
-void
-Break_align_engraver::finalize ()
-{
- column_alist_ = SCM_EOL;
+ Grob *e = unsmob_grob (smob);
+ Break_align_interface::add_element (align_, e);
}
void
Break_align_engraver::stop_translation_timestep ()
{
- 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))
+ for (SCM p = column_alist_; scm_is_pair (p); p = scm_cdr (p))
{
- SCM pair = ly_car (p);
- add_column (ly_cdr (pair));
+ SCM pair = scm_car (p);
+ add_column (scm_cdr (pair));
}
-
-
column_alist_ = SCM_EOL;
- if (align_)
- {
- typeset_grob (align_);
- align_ = 0;
- }
- if (edge_)
- {
- typeset_grob (edge_);
- edge_ = 0;
- }
+ align_ = 0;
+ left_edge_ = 0;
}
-
Break_align_engraver::Break_align_engraver ()
{
column_alist_ = SCM_EOL;
- edge_ = 0;
+ left_edge_ = 0;
align_ = 0;
}
+void
+Break_align_engraver::derived_mark () const
+{
+ scm_gc_mark (column_alist_);
+}
+
void
Break_align_engraver::acknowledge_grob (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");
+ SCM bp = item->get_property ("breakable");
bool breakable = (to_boolean (bp));
if (!breakable)
- return ;
+ return;
- SCM align_name = item->get_grob_property ("break-align-symbol");
- if (!gh_symbol_p (align_name))
- 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);
-
- edge_ = new Item (get_property ("LeftEdge"));
- add_to_group (edge_->get_grob_property ("break-align-symbol"), edge_);
- announce_grob(edge_, SCM_EOL);
+ align_ = make_item ("BreakAlignment", SCM_EOL);
+
+ Context *origin = inf.origin_contexts (this)[0];
+ left_edge_ = make_item_from_properties (dynamic_cast<Engraver *> (origin->implementation ()),
+ ly_symbol2scm ("LeftEdge"),
+ SCM_EOL,
+ "LeftEdge");
+ add_to_group (left_edge_->get_property ("break-align-symbol"),
+ left_edge_);
}
-
+
add_to_group (align_name, item);
}
}
void
-Break_align_engraver::add_to_group(SCM align_name, Item*item)
+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 ());
+ column_alist_ = scm_assoc_set_x (column_alist_, align_name, group->self_scm ());
}
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_TRANSLATOR (Break_align_engraver,
+ "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}. ",
+ /* creats*/ "BreakAlignment BreakAlignGroup LeftEdge",
+ /* accepts */ "",
+ /* acks */ "break-aligned-interface",
+ /* reads */ "",
+ /* write */ "");