source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#ifndef REQUEST_HH
#include "music.hh"
#include "direction.hh"
-/**
- a voice element wants something printed.
- Hungarian postfix: req
- @see lilygut manpage
+
+/** An atom of musical information. This is an abstract class for any
+ piece of music that does not contain other Music.
+
+ Hungarian postfix: req
+
*/
class Request : public Music {
public:
- /* *************** */
+ virtual ~Request(){}
- virtual ~Request(){}
-
- DECLARE_MY_RUNTIME_TYPEINFO;
- VIRTUAL_COPY_CONS(Request,Music);
+ DECLARE_MY_RUNTIME_TYPEINFO;
+ VIRTUAL_COPY_CONS(Request,Music);
- virtual MInterval time_int() const;
- virtual void transpose (Melodic_req const &){}
- virtual Moment duration() const { return 0; }
-
- /* accessors for children
- maybe checkout RTTI
- */
- virtual Barcheck_req *barcheck() { return 0; }
- virtual Script_req *script() { return 0;}
- virtual Span_req *span() { return 0; }
- virtual Spacing_req * spacing() { return 0; }
- virtual Blank_req * blank() { return 0; }
- virtual Musical_req *musical() { return 0; }
- virtual Command_req * command() { return 0; }
- bool equal_b (Request*) const;
+ bool equal_b (Request*) const;
protected:
- virtual bool do_equal_b (Request*) const;
- virtual void do_print() const;
+ virtual bool do_equal_b (Request*) const;
+ virtual void do_print() const;
};
-#define REQUESTMETHODS(T,accessor) \
-virtual T * accessor() { return this;}\
+
+#define REQUESTMETHODS(T) \
DECLARE_MY_RUNTIME_TYPEINFO;\
VIRTUAL_COPY_CONS(T, Request);\
virtual void do_print() const
/** Put a script above or below this ``note'' or bar. eg upbow, downbow. Why
a request? These symbols may conflict with slurs and brackets, so
this also a request */
+
class Script_req : public virtual Request {
public:
- Direction dir_;
- General_script_def *scriptdef_p_;
+ Direction dir_;
+ General_script_def *scriptdef_p_;
+
+ bool do_equal_b (Request*) const;
+
+ Script_req();
+ REQUESTMETHODS(Script_req);
+ ~Script_req();
+ Script_req (Script_req const&);
+};
- /* *************** */
- bool do_equal_b (Request*) const;
- Script_req();
- REQUESTMETHODS(Script_req,script);
- ~Script_req();
- Script_req (Script_req const&);
+/**
+ Requests to start or stop something.
+ This type of request typically results in the creation of a #Spanner#
+*/
+class Span_req : public virtual Request {
+public:
+ /// should the spanner start or stop, or is it unwanted?
+ enum Spantype {
+ NOSPAN, START, STOP
+ } spantype;
+ bool do_equal_b (Request*) const;
+ REQUESTMETHODS(Span_req);
+
+ Span_req();
};
-
+
#endif