--- /dev/null
+/*
+ clef.cc -- implement Clef_engraver
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>,
+ Mats Bengtsson <matsb@s3.kth.se>
+*/
+
+#include <ctype.h>
+#include "bar.hh"
+#include "clef-engraver.hh"
+#include "clef-item.hh"
+#include "debug.hh"
+#include "command-request.hh"
+#include "time-description.hh"
+
+
+#include "note-head.hh"
+#include "key-item.hh"
+#include "local-key-item.hh"
+
+Clef_engraver::Clef_engraver()
+{
+ clef_p_ = 0;
+ clef_req_l_ = 0;
+ clef_type_str_ = "";
+ c0_position_i_ = 0;
+ clef_position_i_ = 0;
+ octave_dir_ = CENTER;
+}
+
+/*
+ Ugh. Should have support for Dictionaries in mudela.
+ */
+bool
+Clef_engraver::set_type (String s)
+{
+ if (s.right_str(2) == "_8") // Down one octave
+ {
+ octave_dir_ = DOWN;
+ s = s.left_str(s.length_i() - 2);
+ }
+ else if (s.right_str(2) == "^8") // Up one octave
+ {
+ octave_dir_ = UP;
+ s = s.left_str(s.length_i() - 2);
+ }
+ else
+ octave_dir_ = CENTER;
+ if (s == "treble" ||
+ s == "violin" ||
+ s == "G" || s == "G2")
+ {
+ clef_type_str_ = "violin";
+ clef_position_i_ = -2;
+ }
+ else if (s == "french")
+ {
+ clef_type_str_ = "violin";
+ clef_position_i_ = -4;
+ }
+ else if (s == "soprano")
+ {
+ clef_type_str_ = "alto";
+ clef_position_i_ = -4;
+ }
+ else if (s == "mezzosoprano")
+ {
+ clef_type_str_ = "alto";
+ clef_position_i_ = -2;
+ }
+ else if (s == "alto")
+ {
+ clef_type_str_ = "alto";
+ clef_position_i_ = 0;
+ }
+ else if (s == "tenor")
+ {
+ clef_type_str_ = "alto";
+ clef_position_i_ = 2;
+ }
+ else if (s == "baritone")
+ {
+ clef_type_str_ = "alto";
+ clef_position_i_ = 4;
+ }
+ else if (s == "varbaritone")
+ {
+ clef_type_str_ = "bass";
+ clef_position_i_ = 0;
+ }
+ else if (s == "bass" || s == "F")
+ {
+ clef_type_str_ = "bass";
+ clef_position_i_ = 2;
+ }
+ else if (s == "subbass")
+ {
+ clef_type_str_ = "bass";
+ clef_position_i_ = 4;
+ }
+ else
+ {
+ switch(toupper (s[0]))
+ {
+ case 'F':
+ clef_type_str_ = "bass";
+ break;
+ case 'G':
+ clef_type_str_ = "violin";
+ break;
+ case 'C':
+ clef_type_str_ = "alto";
+ break;
+ default:
+ return false;
+ }
+ clef_position_i_ = 2 * (s[1] - '0') - 6;
+ }
+ if (clef_type_str_ == "violin")
+ c0_position_i_ = clef_position_i_ - 4;
+ else if (clef_type_str_ == "alto")
+ c0_position_i_ = clef_position_i_;
+ else if (clef_type_str_ == "bass")
+ c0_position_i_ = clef_position_i_ + 4;
+ else
+ assert (false);
+
+
+ c0_position_i_ -= (int) octave_dir_ * 7;
+
+ return true;
+}
+
+void
+Clef_engraver::read_req (Clef_change_req*c_l)
+{
+ if (!set_type (c_l->clef_str_))
+ c_l->error (_ ("unknown clef type "));
+}
+
+
+/**
+ Generate a clef at the start of a measure. (when you see a Bar,
+ ie. a breakpoint)
+ */
+void
+Clef_engraver::acknowledge_element (Score_element_info info)
+{
+ if (info.elem_l_->is_type_b (Bar::static_name ())
+ && clef_type_str_.length_i())
+ {
+ create_clef();
+ if (!clef_req_l_)
+ clef_p_->default_b_ = true;
+ }
+
+ /* ugh; should make Clef_referenced baseclass */
+ Item * it_l =info.elem_l_->access_Item ();
+if (it_l)
+ {
+ if (it_l->is_type_b (Note_head::static_name ()))
+ {
+ Note_head * h = (Note_head*)it_l;
+ h->position_i_ += c0_position_i_;
+ }
+ else if (it_l->is_type_b (Local_key_item::static_name ()))
+ {
+ Local_key_item *i = (Local_key_item*)it_l;
+ i->c0_position_i_ =c0_position_i_;
+ }
+ else if (it_l->is_type_b (Key_item::static_name ()))
+ {
+ Key_item *k = (Key_item*)it_l;
+ k-> set_c_position (c0_position_i_);
+ }
+ }
+}
+
+void
+Clef_engraver::do_creation_processing()
+{
+ Scalar def = get_property ("defaultclef");
+ if (def.operator bool ()) // egcs: Scalar to bool is ambiguous
+ set_type (def);
+ if (clef_type_str_.length_i ())
+ {
+ create_clef();
+ clef_p_->default_b_ = false;
+ }
+}
+
+bool
+Clef_engraver::do_try_request (Request * r_l)
+{
+ Command_req* creq_l= r_l->access_Command_req ();
+ if (!creq_l || !creq_l->access_Clef_change_req ())
+ return false;
+
+ clef_req_l_ = creq_l->access_Clef_change_req ();
+ read_req (clef_req_l_);
+ return true;
+}
+
+void
+Clef_engraver::create_clef()
+{
+ if (!clef_p_)
+ {
+ clef_p_ = new Clef_item;
+ clef_p_->break_priority_i_ = -2; // ugh
+ announce_element (Score_element_info (clef_p_,clef_req_l_));
+ }
+ clef_p_->read (*this);
+}
+
+void
+Clef_engraver::do_process_requests()
+{
+ if (clef_req_l_)
+ {
+ create_clef();
+ clef_p_->default_b_ = false;
+ }
+}
+
+void
+Clef_engraver::do_pre_move_processing()
+{
+ if (clef_p_)
+ {
+ typeset_element (clef_p_);
+ clef_p_ = 0;
+ }
+}
+void
+Clef_engraver::do_post_move_processing()
+{
+ clef_req_l_ = 0;
+}
+
+void
+Clef_engraver::do_removal_processing()
+{
+ if (clef_p_)
+ {
+ clef_p_->unlink ();
+ delete clef_p_;
+ clef_p_ =0;
+ }
+}
+
+
+IMPLEMENT_IS_TYPE_B1(Clef_engraver,Engraver);
+ADD_THIS_TRANSLATOR(Clef_engraver);