2 request.hh -- declare Request baseclasses.
4 source file of the GNU LilyPond music typesetter
6 (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
11 // GNU LilyPond's second egg of columbus!
16 #include "virtual-methods.hh"
20 a voice element wants something printed.
21 Hungarian postfix: req
24 class Request : public Input {
31 Request(Request const&);
35 virtual Request* clone() const { return new Request(*this); }
38 virtual void transpose(Melodic_req const &){}
39 virtual Moment duration() const { return 0; }
41 /* accessors for children
44 virtual Barcheck_req *barcheck() { return 0; }
45 virtual Script_req *script() { return 0;}
46 virtual Text_req*text() { return 0; }
47 virtual Rest_req *rest() { return 0; }
48 virtual Span_req *span() { return 0; }
49 virtual Spacing_req * spacing() { return 0; }
50 virtual Blank_req * blank() { return 0; }
51 virtual Musical_req *musical() { return 0; }
52 virtual Command_req * command() { return 0; }
54 virtual void do_print()const ;
57 #define REQUESTMETHODS(T,accessor) \
58 virtual T * accessor() { return this;}\
60 VIRTUAL_COPY_CONS(T, Request)\
61 virtual void do_print() const
65 /** Put a script above or below this ``note'' or bar. eg upbow, downbow. Why
66 a request? These symbols may conflict with slurs and brackets, so
67 this also a request */
68 class Script_req : public virtual Request {
71 General_script_def *scriptdef_p_;
74 static int compare(const Script_req &, const Script_req &);
76 REQUESTMETHODS(Script_req,script);
78 Script_req(Script_req const&);