2 score-element.hh -- declare Score_element
4 (c) 1996-1999 Han-Wen Nienhuys
11 #include "virtual-methods.hh"
12 #include "graphical-element.hh"
13 #include "lily-guile.hh"
16 typedef void (Score_element::*Score_element_method_pointer) (void);
18 /** Both Spanner and Item are Score_element's. Most Score_element's depend
19 on other Score_element's, eg, Beam needs to know and set direction of
20 Stem. So the Beam has to be calculated *before* Stem. This is
21 accomplished with the dependencies fields of struct Score_element,
22 which are implemented in the Directed_graph_node class: all elements
23 form an acyclic graph.
30 Boolean (true iff defined)
32 break_helper_only -- if defined try to junk this after calcing breakpoints.
34 transparent -- do not calc. output
37 class Score_element : public virtual Graphical_element {
39 properties specific for this element. Destructor will not call
40 scm_unprotect, so as to allow more flexible GC arrangements. The
41 real alist is in (cdr element_property_alist_), to reduce the
42 need for more scm_protect calls.
45 SCM element_property_alist_;
46 Link_array<Score_element> dependency_arr_;
48 The lookup, determined by the font size. Cache this value.
52 Score_element *original_l_;
55 Administration: Where are we?. This is mainly used by Super_element and
56 Score_element::calcalute_dependencies ()
64 Paper_score *pscore_l_;
67 Score_element (Score_element const&);
68 virtual void print () const;
73 SCM get_elt_property (String nm) const;
74 void set_elt_property (String, SCM val);
75 SCM remove_elt_property (String nm);
80 Paper_def *paper_l () const;
81 Lookup const *lookup_l () const;
83 void add_processing ();
85 void substitute_dependency (Score_element*,Score_element*);
86 void remove_dependency (Score_element*);
88 add a dependency. It may be the 0 pointer, in which case, it is ignored.
90 void add_dependency (Score_element*);
91 virtual Line_of_score * line_l () const;
92 bool linked_b () const;
93 VIRTUAL_COPY_CONS(Score_element);
96 Recursively track all dependencies of this Score_element. The
97 status_i_ field is used as a mark-field. It is marked with
98 #busy# during execution of this function, and marked with #final#
101 #funcptr# is the function to call to update this element.
103 void calculate_dependencies (int final, int busy, Score_element_method_pointer funcptr);
106 virtual Score_element *find_broken_piece (Line_of_score*) const;
110 Junk score element. This is protected because this is supposed to
111 be handled by GUILE gc. */
112 virtual ~Score_element ();
114 Score_element* dependency (int) const;
115 int dependency_size () const;
117 virtual void output_processing ();
118 virtual Interval do_height () const;
119 virtual Interval do_width () const;
122 /// do printing of derived info.
123 virtual void do_print () const;
124 /// generate the molecule
125 virtual Molecule* do_brew_molecule_p () const;
126 ///executed directly after the item is added to the Paper_score
127 virtual void do_add_processing ();
128 /// do calculations before determining horizontal spacing
129 virtual void do_pre_processing ();
131 /// generate rods & springs
132 virtual void do_space_processing ();
134 /// do postbreak substs on array of pointers.
135 virtual void do_substitute_arrays ();
137 virtual void do_breakable_col_processing ();
138 /// do calculations after determining horizontal spacing
139 virtual void do_post_processing ();
141 virtual void do_substitute_element_pointer (Score_element * , Score_element *);
142 virtual void do_break_processing ();
143 virtual void handle_broken_dependencies ();
144 virtual void handle_prebroken_dependencies ();
145 virtual void handle_prebroken_dependents ();
146 virtual void handle_broken_dependents ();
147 virtual Link_array<Score_element> get_extra_dependencies () const;
149 static Interval dim_cache_callback (Dimension_cache*);
158 substitute_element_array (Link_array<T> &arr, Line_of_score * to)
160 Link_array<T> newarr;
161 for (int i =0; i < arr.size (); i++)
164 if (t->line_l () != to)
166 t = dynamic_cast<T*> (t->find_broken_piece (to));
177 #endif // STAFFELEM_HH