source file of the GNU LilyPond music typesetter
- (c) 2000--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2000--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "engraver.hh"
-#include "grob.hh"
#include "context.hh"
+#include "grob.hh"
+#include "stream-event.hh"
+
+#include "translator.icc"
+
class Output_property_engraver : public Engraver
{
TRANSLATOR_DECLARATIONS (Output_property_engraver);
protected:
- Link_array<Music> props_;
- DECLARE_ACKNOWLEDGER (grob)
+ vector<Stream_event*> props_;
+
+ DECLARE_ACKNOWLEDGER (grob);
+ DECLARE_TRANSLATOR_LISTENER (apply_output);
void stop_translation_timestep ();
- virtual bool try_music (Music*);
};
-
-bool
-Output_property_engraver::try_music (Music* m)
+IMPLEMENT_TRANSLATOR_LISTENER (Output_property_engraver, apply_output);
+void
+Output_property_engraver::listen_apply_output (Stream_event *ev)
{
- if (m->is_mus_type ("layout-instruction"))
- {
- props_.push (m);
- return true;
- }
- return false;
+ /*
+ UGH. Only swallow the output property event in the context
+ it was intended for. This is inelegant but not inefficient.
+ */
+ if (context ()->is_alias (ev->get_property ("context-type")))
+ props_.push_back (ev);
}
void
Output_property_engraver::acknowledge_grob (Grob_info inf)
{
- for (int i = props_.size (); i--;)
+ for (vsize i = props_.size (); i--;)
{
- Music * o = props_[i];
- SCM pred = o->get_property ("predicate");
-
- if (ly_is_procedure (pred))
- {
- /*
- should typecheck pred.
- */
- SCM result = scm_call_1 (pred, inf.grob ()->self_scm ());
- if (to_boolean (result))
- {
- SCM sym = o->get_property ("grob-property");
- SCM val = o->get_property ("grob-value");
- inf.grob ()->internal_set_property (sym, val);
- }
- }
- else
- {
- Context * d = inf.context ();
- SCM proc = o->get_property ("procedure");
- scm_call_3 (proc,
- inf.grob ()->self_scm (),
- d->self_scm (),
- context ()->self_scm ());
- }
+ Stream_event *o = props_[i];
+ Context *d = inf.context ();
+ SCM proc = o->get_property ("procedure");
+ scm_call_3 (proc,
+ inf.grob ()->self_scm (),
+ d->self_scm (),
+ context ()->self_scm ());
}
}
{
}
-#include "translator.icc"
-ADD_ACKNOWLEDGER (Output_property_engraver,grob)
+ADD_ACKNOWLEDGER (Output_property_engraver, grob);
ADD_TRANSLATOR (Output_property_engraver,
-/* descr */ "Interpret Music of Output_property type, and apply a function "
-" to any Graphic objects that satisfies the predicate.",
-/* creats*/ "",
-/* accepts */ "layout-instruction",
-/* reads */ "",
-/* write */ "");
+ /* doc */
+ "Apply a procedure to any grob acknowledged.",
+
+ /* create */
+ "",
+
+ /* read */
+ "",
+
+ /* write */
+ ""
+ );