/*
- vertical-align-grav.cc -- implement Vertical_align_engraver
+ vertical-align-engraver.cc -- implement Vertical_align_engraver
source file of the GNU LilyPond music typesetter
- (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "translator-group.hh"
+
+#include "context.hh"
#include "paper-column.hh"
#include "align-interface.hh"
#include "span-bar.hh"
class Vertical_align_engraver : public Engraver
{
- Spanner * valign_;
- bool qualifies_b (Grob_info) const;
+ Spanner *valign_;
+ bool qualifies (Grob_info) const;
+ SCM id_to_group_hashtab_;
+
public:
- TRANSLATOR_DECLARATIONS(Vertical_align_engraver);
+ TRANSLATOR_DECLARATIONS (Vertical_align_engraver);
+
protected:
+ virtual void derived_mark () const;
virtual void acknowledge_grob (Grob_info);
virtual void process_music ();
virtual void finalize ();
+ virtual void initialize ();
};
+
+ADD_TRANSLATOR (Vertical_align_engraver,
+ "Catch groups (staffs, lyrics lines, etc.) and stack "
+ "them vertically.",
+ /* creats*/ "VerticalAlignment",
+ /* accepts */ "",
+ /* acks */ "axis-group-interface",
+ /* reads */ "",
+ /* write */ "");
+
+
Vertical_align_engraver::Vertical_align_engraver ()
{
- valign_ =0;
+ valign_ = 0;
+ id_to_group_hashtab_ = SCM_EOL;
}
+void
+Vertical_align_engraver::derived_mark () const
+{
+ scm_gc_mark (id_to_group_hashtab_);
+}
+
+void
+Vertical_align_engraver::initialize ()
+{
+ id_to_group_hashtab_ = scm_c_make_hash_table (11);
+}
+
+
void
Vertical_align_engraver::process_music ()
{
if (!valign_)
{
- valign_ =make_spanner ("VerticalAlignment");
- valign_->set_bound (LEFT,unsmob_grob (get_property ("currentCommandColumn")));
- announce_grob (valign_ , SCM_EOL);
+ valign_ = make_spanner ("VerticalAlignment", SCM_EOL);
+ valign_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
}
}
{
if (valign_)
{
- valign_->set_bound (RIGHT,unsmob_grob (get_property ("currentCommandColumn")));
- typeset_grob (valign_);
- valign_ =0;
+ valign_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+ valign_ = 0;
}
}
bool
-Vertical_align_engraver::qualifies_b (Grob_info i) const
+Vertical_align_engraver::qualifies (Grob_info i) const
{
- int sz = i.origin_transes ((Translator*)this).size () ;
+ int sz = i.origin_contexts ((Translator *)this).size ();
- return sz > 1 && Axis_group_interface::has_interface (i.grob_)
- && !i.grob_->get_parent (Y_AXIS) && Axis_group_interface::axis_b (i.grob_, Y_AXIS);
+ return sz > 0 && Axis_group_interface::has_interface (i.grob ())
+ && !i.grob ()->get_parent (Y_AXIS) && Axis_group_interface::has_axis (i.grob (), Y_AXIS);
}
void
Vertical_align_engraver::acknowledge_grob (Grob_info i)
{
- if (qualifies_b (i))
+ if (qualifies (i))
{
- Align_interface::add_element (valign_,i.grob_, get_property ("verticalAlignmentChildCallback"));
- }
-}
+ String id = i.context ()->id_string ();
+
+ scm_hash_set_x (id_to_group_hashtab_, scm_makfrom0str (id.to_str0 ()),
+ i.grob ()->self_scm ());
+
+
+ SCM before_id = i.context ()->get_property ("alignAboveContext");
+ SCM after_id = i.context ()->get_property ("alignBelowContext");
+
+ SCM before = scm_hash_ref (id_to_group_hashtab_, before_id, SCM_BOOL_F);
+ SCM after = scm_hash_ref (id_to_group_hashtab_, after_id, SCM_BOOL_F);
-ENTER_DESCRIPTION(Vertical_align_engraver,
-/* descr */ "Catch Vertical axis groups and stack them.",
-/* creats*/ "VerticalAlignment",
-/* accepts */ "",
-/* acks */ "axis-group-interface",
-/* reads */ "",
-/* write */ "");
+ Align_interface::add_element (valign_, i.grob (),
+ get_property ("verticalAlignmentChildCallback"));
+
+ if (unsmob_grob (before) || unsmob_grob (after))
+ {
+ SCM elts = valign_->get_property ("elements");
+ SCM new_order = scm_cdr (elts);
+ SCM *current = &new_order;
+
+ for (SCM s = new_order; scm_is_pair (s); s = scm_cdr (s))
+ {
+ if (scm_car (s) == after)
+ {
+ *current = scm_cons (i.grob ()->self_scm(), s);
+ break;
+ }
+ else if (scm_car (s) == before)
+ {
+ scm_set_cdr_x (s, scm_cons (i.grob ()->self_scm (),
+ scm_cdr (s)));
+ break;
+ }
+
+ current = SCM_CDRLOC (s);
+ }
+
+ valign_->set_property ("elements", new_order);
+ }
+ }
+}