/*
- 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--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "translator-group.hh"
-#include "axis-group-engraver.hh"
+
+#include "context.hh"
#include "paper-column.hh"
-#include "vertical-align-engraver.hh"
-#include "axis-align-spanner.hh"
-#include "axis-group-spanner.hh"
+#include "align-interface.hh"
#include "span-bar.hh"
+#include "axis-group-interface.hh"
+#include "engraver.hh"
+#include "spanner.hh"
-Vertical_align_engraver::Vertical_align_engraver()
+class Vertical_align_engraver : public Engraver
{
- valign_p_ =0;
+ Spanner *valign_;
+ bool qualifies (Grob_info) const;
+ SCM id_to_group_hashtab_;
+
+public:
+ 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;
+ id_to_group_hashtab_ = SCM_EOL;
}
void
-Vertical_align_engraver::do_creation_processing()
+Vertical_align_engraver::derived_mark () const
{
- valign_p_ =new Axis_align_spanner;
- valign_p_->set_axis (Y_AXIS);
- valign_p_->set_elt_property ("stacking-dir", gh_int2scm (DOWN));
-
- valign_p_->set_bound(LEFT,get_staff_info().command_pcol_l ());
- announce_element (Score_element_info (valign_p_ , 0));
+ scm_gc_mark (id_to_group_hashtab_);
}
void
-Vertical_align_engraver::do_removal_processing()
+Vertical_align_engraver::initialize ()
{
- SCM min = get_property ("maxVerticalAlign");
- SCM max = get_property ("minVerticalAlign");
-
- if (gh_number_p (min) || gh_number_p (max))
- {
- min = gh_number_p (min) ? min : gh_double2scm (0.0);
- max = gh_number_p (max) ? max : gh_double2scm (infinity_f);
-
- valign_p_->set_elt_property ("threshold",
- gh_cons (min,max));
- }
- valign_p_->set_bound(RIGHT,get_staff_info().command_pcol_l ());
- typeset_element (valign_p_);
- valign_p_ =0;
+ id_to_group_hashtab_ = scm_c_make_hash_table (11);
}
-bool
-Vertical_align_engraver::qualifies_b (Score_element_info i) const
+void
+Vertical_align_engraver::process_music ()
{
- int sz = i.origin_trans_l_arr ((Translator*)this).size() ;
-
- Axis_group_element * elt = dynamic_cast<Axis_group_element *> (i.elem_l_);
-
- return sz > 1 && elt && !elt->parent_l (Y_AXIS) && elt->axis_b (Y_AXIS);
+ if (!valign_)
+ {
+ valign_ = make_spanner ("VerticalAlignment", SCM_EOL);
+ valign_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
+ }
}
void
-Vertical_align_engraver::acknowledge_element (Score_element_info i)
+Vertical_align_engraver::finalize ()
{
- if (qualifies_b (i))
+ if (valign_)
{
- valign_p_->add_element (i.elem_l_);
+ valign_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+ valign_ = 0;
}
- /*
- ? huh
- */
- else if (dynamic_cast<Span_bar*>(i.elem_l_) && i.origin_trans_l_arr (this).size ())
- {
- i.elem_l_->add_dependency (valign_p_);
- }
}
+bool
+Vertical_align_engraver::qualifies (Grob_info i) const
+{
+ int sz = i.origin_contexts ((Translator *)this).size ();
+
+ 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 (i))
+ {
+ String id = i.context ()->id_string ();
+
+ scm_hash_set_x (id_to_group_hashtab_, scm_makfrom0str (id.to_str0 ()),
+ i.grob ()->self_scm ());
-ADD_THIS_TRANSLATOR(Vertical_align_engraver);
+ 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);
+
+
+ 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);
+ }
+ }
+}