lilypond-0.0.30

diff --git a/src/stembeamreg.cc b/src/stembeamreg.cc
new file mode 100644 (file)
index 0000000..506bde3
--- /dev/null
+++ b/src/stembeamreg.cc
@@ -0,0 +1,153 @@
+/*
+  stembeamreg.cc -- part of LilyPond
+
+  (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+*/
+
+#include "stembeamreg.hh"
+#include "beam.hh"
+#include "stem.hh"
+#include "grouping.hh"
+#include "textspanner.hh"
+#include "complexwalker.hh"
+#include "complexstaff.hh"
+#include "debug.hh"
+
+Stem_beam_register::Stem_beam_register(Complex_walker*w)
+    :Request_register(w)
+{
+    do_post_move_process();
+    current_grouping = 0;
+    beam_p_ = 0;
+    set_dir(0);
+    start_req_l_ = 0;
+}
+
+bool
+Stem_beam_register::try_request(Request*req_l)
+{
+    if ( req_l->beam() ) {
+       if (bool(beam_p_ ) == bool(req_l->beam()->spantype == Span_req::START))
+           return false;
+       
+       if (beam_req_l_ && Beam_req::compare(*beam_req_l_ , *req_l->beam()))
+           return false;
+       
+       beam_req_l_ = req_l->beam();
+       return true;
+    }
+    
+    if ( req_l->stem() ) {
+       if (current_grouping && !current_grouping->child_fit_query(
+           walk_l_->col()->tdescription_->whole_in_measure))
+           return false;
+
+       if (stem_req_l_ && Stem_req::compare(*stem_req_l_, *req_l->stem()))
+           return false;
+
+       stem_req_l_ = req_l->stem();
+       return true;
+    }
+    return false;
+}
+
+void
+Stem_beam_register::process_request()
+{
+    if (beam_req_l_) {
+       if (beam_req_l_->spantype == Span_req::STOP) {
+           end_beam_b_ = true;
+           start_req_l_ = 0;
+       } else {
+           beam_p_ = new Beam;
+           start_req_l_ = beam_req_l_;
+
+           current_grouping = new Rhythmic_grouping;
+           if (beam_req_l_->nplet) {
+               Text_spanner* t = new Text_spanner();
+               t->set_support(beam_p_);
+               t->spec.align_i_ = 0;
+               t->spec.text_str_ = beam_req_l_->nplet;
+               typeset_element(t);
+           }
+            
+       }
+    }
+
+    if (stem_req_l_) {
+       stem_p_ = new Stem(4);
+       if (current_grouping)
+           current_grouping->add_child(
+               walk_l_->col()->tdescription_->whole_in_measure,
+               stem_req_l_->duration());
+
+       stem_p_->flag = stem_req_l_->balltype;
+
+       if (beam_p_) {
+           if (stem_req_l_->balltype<= 4)
+               warning( "stem doesn't fit in Beam",
+                        stem_req_l_->defined_ch_c_l_m);
+           else
+               beam_p_->add(stem_p_);
+           stem_p_->print_flag = false;
+       } else {
+           stem_p_->print_flag = true;
+       }
+       
+       announce_element(Staff_elem_info(stem_p_,
+                                                 stem_req_l_,  this));
+    }
+}
+
+void
+Stem_beam_register::acknowledge_element(Staff_elem_info info)
+{
+    if (!stem_p_)
+       return;
+
+    if (info.elem_p_->name() == String("Notehead") &&
+       stem_req_l_->duration() == info.req_l_->rhythmic()->duration())
+       
+       stem_p_->add((Notehead*)info.elem_p_);
+}
+
+void
+Stem_beam_register::do_pre_move_process()
+{
+    if (stem_p_) {
+       if (default_dir_i_)
+           stem_p_->dir = default_dir_i_;
+       
+       typeset_element(stem_p_);
+       stem_p_ = 0;
+    }
+    if (beam_p_ && end_beam_b_) {
+       walk_l_->default_grouping.extend(current_grouping->interval());
+       beam_p_->set_grouping(walk_l_->default_grouping, *current_grouping);
+       typeset_element(beam_p_);
+       delete current_grouping;
+       current_grouping = 0;
+       beam_p_ = 0;
+    }
+    end_beam_b_ = false;
+}
+void
+Stem_beam_register::do_post_move_process()
+{
+    stem_p_ = 0;
+    beam_req_l_ = 0;
+    stem_req_l_ = 0;
+    end_beam_b_ = false;
+}
+
+Stem_beam_register::~Stem_beam_register()
+{
+    if (beam_p_)
+       warning("unterminated beam", start_req_l_->defined_ch_c_l_m);
+}
+
+void
+Stem_beam_register::set_dir(int i)
+{
+    default_dir_i_ = i;
+}