2 score-element.hh -- declare Score_element
4 (c) 1996-1999--2000 Han-Wen Nienhuys
11 #include "virtual-methods.hh"
12 #include "lily-guile.hh"
13 #include "lily-proto.hh"
15 #include "dimension-cache.hh"
17 typedef Interval (*Extent_callback)(Score_element const *,Axis);
18 typedef Real (*Offset_callback)(Score_element const *,Axis);
22 for administration of what was done already
24 enum Score_element_status {
25 ORPHAN=0, // not yet added to pstaff
26 VIRGIN, // added to pstaff
28 PRECALCED, // calcs before spacing done
29 POSTCALCING, // busy calculating. This is used to trap cyclic deps.
30 POSTCALCED, // after spacing calcs done
35 typedef void (Score_element::*Score_element_method_pointer) (void);
42 transparent -- boolean: if true, do not print anything black.
44 dependencies -- list of score-element pointers that indicate who to
47 interfaces -- list of symbols indicating the interfaces supported
50 extra-offset -- pair of reals (a cons) forcing an extra offset
53 glyph -- afm character name to output.
58 The lookup, determined by the font size. Cache this value.
63 properties specific for this element. Destructor will not call
64 scm_unprotect, so as to allow more flexible GC arrangements. The
65 real alist is in (cdr element_property_alist_), to reduce the
66 need for more scm_protect calls.
69 SCM element_property_alist_;
71 Score_element *original_l_;
74 Administration: Where are we?. This is mainly used by Super_element and
75 Score_element::calcalute_dependencies ()
81 Set this if anyone points to me, or if I point to anyone.
87 char const * name () const;
90 IDEA: make this a global variable. This is the same for all
91 elements, I think it is safe to assume that we will not have
92 scores being formatted multithreadedly.
94 Paper_score *pscore_l_;
97 Score_element (Score_element const&);
102 SCM get_elt_property (String nm) const;
103 void set_elt_property (String, SCM val);
108 This gets messy because it changes state
114 s->remove_elt_property ("foo")
117 twice may do weird things if Bar::foo has a default set.
120 SCM remove_elt_property (String nm);
125 Paper_def *paper_l () const;
126 Lookup const *lookup_l () const;
128 void add_processing ();
131 add a dependency. It may be the 0 pointer, in which case, it is ignored.
133 void add_dependency (Score_element*);
134 virtual Line_of_score * line_l () const;
135 bool linked_b () const;
138 VIRTUAL_COPY_CONS(Score_element);
141 Recursively track all dependencies of this Score_element. The
142 status_i_ field is used as a mark-field. It is marked with
143 #busy# during execution of this function, and marked with #final#
146 #funcptr# is the function to call to update this element.
148 void calculate_dependencies (int final, int busy, Score_element_method_pointer funcptr);
151 static SCM handle_broken_smobs (SCM, SCM criterion);
153 virtual void do_break_processing ();
154 virtual Score_element *find_broken_piece (Line_of_score*) const;
155 /// generate rods & springs
156 virtual void do_space_processing ();
157 virtual void discretionary_processing ();
159 /// do calculations before determining horizontal spacing
160 virtual void before_line_breaking ();
161 /// do calculations after determining horizontal spacing
162 virtual void after_line_breaking ();
164 Molecule get_molecule () const;
167 static Interval preset_extent (Score_element const*,Axis);
168 static Interval point_dimension_callback (Score_element const*,Axis );
169 static Interval molecule_extent (Score_element const*,Axis);
174 Junk score element. This is protected because this is supposed to
175 be handled by GUILE gc. */
176 virtual ~Score_element ();
178 /// generate the molecule
179 virtual Molecule do_brew_molecule () const;
180 ///executed directly after the item is added to the Paper_score
181 virtual void do_add_processing ();
183 static Interval dim_cache_callback (Dimension_cache const*);
186 static SCM ly_set_elt_property (SCM, SCM,SCM);
187 static SCM ly_get_elt_property (SCM, SCM);
189 virtual void handle_broken_dependencies ();
190 virtual void handle_prebroken_dependencies ();
197 Dimension_cache dim_cache_[NO_AXES];
200 bool empty_b (Axis a) const;
201 Interval extent (Axis) const;
204 translate in one direction
207 void translate_axis (Real, Axis);
210 Find the offset relative to D. If D equals THIS, then it is 0.
211 Otherwise, it recursively defd as
213 OFFSET_ + PARENT_L_->relative_coordinate (D)
215 Real relative_coordinate (Score_element const* refp, Axis) const;
217 Find the group-element which has both #this# and #s#
219 Score_element*common_refpoint (Score_element const* s, Axis a) const;
220 Score_element*common_refpoint (SCM elt_list, Axis a) const;
222 bool has_offset_callback_b (Offset_callback, Axis)const;
223 void add_offset_callback (Offset_callback, Axis);
224 bool has_extent_callback_b (Extent_callback, Axis)const;
225 void set_extent_callback (Extent_callback , Axis);
228 Invoke callbacks to get offset relative to parent.
230 Real get_offset (Axis a) const;
232 Set the parent refpoint of THIS to E
234 void set_parent (Score_element* e, Axis);
236 Score_element *parent_l (Axis a) const;
237 void fixup_refpoint ();
240 Score_element * unsmob_element (SCM);
244 #endif // STAFFELEM_HH