/*
- 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--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include "translator-group.hh"
+
+#include "context.hh"
#include "paper-column.hh"
#include "align-interface.hh"
#include "span-bar.hh"
#include "axis-group-interface.hh"
#include "engraver.hh"
#include "spanner.hh"
+#include "pointer-group-interface.hh"
+#include "grob-array.hh"
+
+#include "translator.icc"
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);
+ DECLARE_ACKNOWLEDGER (axis_group);
+
protected:
- virtual void acknowledge_grob (Grob_info);
- virtual void initialize ();
+ virtual void derived_mark () const;
+ void process_music ();
virtual void finalize ();
+ virtual void initialize ();
};
+ADD_ACKNOWLEDGER (Vertical_align_engraver, axis_group);
+ADD_TRANSLATOR (Vertical_align_engraver,
+ "Catch groups (staffs, lyrics lines, etc.) and stack "
+ "them vertically.",
+ /* create */ "VerticalAlignment",
+ /* accept */ "",
+ /* read */ "",
+ /* 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 ()
{
- valign_ =new Spanner (get_property ("VerticalAlignment"));
- valign_->set_bound (LEFT,unsmob_grob (get_property ("currentCommandColumn")));
- announce_grob(valign_ , SCM_EOL);
+ id_to_group_hashtab_ = scm_c_make_hash_table (11);
}
void
-Vertical_align_engraver::finalize ()
+Vertical_align_engraver::process_music ()
{
- valign_->set_bound (RIGHT,unsmob_grob (get_property ("currentCommandColumn")));
- typeset_grob (valign_);
- valign_ =0;
+ if (!valign_)
+ {
+ valign_ = make_spanner ("VerticalAlignment", SCM_EOL);
+ valign_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
+ Align_interface::set_ordered (valign_);
+ }
}
+void
+Vertical_align_engraver::finalize ()
+{
+ if (valign_)
+ {
+ 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)
+Vertical_align_engraver::acknowledge_axis_group (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 ());
-ENTER_DESCRIPTION(Vertical_align_engraver,
-/* descr */ "Catch Vertical axis groups and stack them.",
-/* creats*/ "VerticalAlignment",
-/* accepts */ "",
-/* acks */ "axis-group-interface",
-/* reads */ "",
-/* write */ "");
+ 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);
+
+ Grob *before_grob = unsmob_grob (before);
+ Grob *after_grob = unsmob_grob (after);
+
+ Align_interface::add_element (valign_, i.grob ());
+
+ if (before_grob || after_grob)
+ {
+ Grob_array *ga = unsmob_grob_array (valign_->get_object ("elements"));
+ Link_array<Grob> &arr = ga->array_reference ();
+
+ Grob *added = arr.pop ();
+ for (int i = 0; i < arr.size (); i++)
+ {
+ if (arr[i] == before_grob)
+ {
+ arr.insert (added, i);
+ break;
+ }
+ else if (arr[i] == after_grob)
+ {
+ arr.insert (added, i + 1);
+ break;
+ }
+ }
+ }
+ }
+}