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.
73 Score_element *original_l_;
76 Administration: Where are we?. This is mainly used by Super_element and
77 Score_element::calcalute_dependencies ()
83 Set this if anyone points to me, or if I point to anyone.
89 char const * name () const;
92 IDEA: make this a global variable. This is the same for all
93 elements, I think it is safe to assume that we will not have
94 scores being formatted multithreadedly.
96 Paper_score *pscore_l_;
99 Score_element (Score_element const&);
104 SCM get_elt_property (String nm) const;
105 void set_elt_property (String, SCM val);
108 Pointers are like properties, but they are subject to a substitution
111 SCM get_elt_pointer (const char*) const;
112 void set_elt_pointer (const char*, SCM val);
113 friend class Property_engraver; // UGHUGHUGH.
117 This gets messy because it changes state
123 s->remove_elt_property ("foo")
126 twice may do weird things if Bar::foo has a default set.
129 SCM remove_elt_property (const char* nm);
134 Paper_def *paper_l () const;
135 Lookup const *lookup_l () const;
137 void add_processing ();
140 add a dependency. It may be the 0 pointer, in which case, it is ignored.
142 void add_dependency (Score_element*);
143 virtual Line_of_score * line_l () const;
144 bool linked_b () const;
147 VIRTUAL_COPY_CONS(Score_element);
150 Recursively track all dependencies of this Score_element. The
151 status_i_ field is used as a mark-field. It is marked with
152 #busy# during execution of this function, and marked with #final#
155 #funcptr# is the function to call to update this element.
157 void calculate_dependencies (int final, int busy, Score_element_method_pointer funcptr);
160 static SCM handle_broken_smobs (SCM, SCM criterion);
162 virtual void do_break_processing ();
163 virtual Score_element *find_broken_piece (Line_of_score*) const;
164 /// generate rods & springs
165 virtual void do_space_processing ();
166 virtual void discretionary_processing ();
168 /// do calculations before determining horizontal spacing
169 virtual void before_line_breaking ();
170 /// do calculations after determining horizontal spacing
171 virtual void after_line_breaking ();
173 Molecule get_molecule () const;
176 static Interval preset_extent (Score_element const*,Axis);
177 static Interval point_dimension_callback (Score_element const*,Axis );
178 static Interval molecule_extent (Score_element const*,Axis);
183 Junk score element. This is protected because this is supposed to
184 be handled by GUILE gc. */
185 virtual ~Score_element ();
187 /// generate the molecule
188 virtual Molecule do_brew_molecule () const;
189 ///executed directly after the item is added to the Paper_score
190 virtual void do_add_processing ();
192 static Interval dim_cache_callback (Dimension_cache const*);
195 static SCM ly_set_elt_property (SCM, SCM,SCM);
196 static SCM ly_get_elt_property (SCM, SCM);
198 virtual void handle_broken_dependencies ();
199 virtual void handle_prebroken_dependencies ();
206 Dimension_cache dim_cache_[NO_AXES];
209 bool empty_b (Axis a) const;
210 Interval extent (Axis) const;
213 translate in one direction
216 void translate_axis (Real, Axis);
219 Find the offset relative to D. If D equals THIS, then it is 0.
220 Otherwise, it recursively defd as
222 OFFSET_ + PARENT_L_->relative_coordinate (D)
224 Real relative_coordinate (Score_element const* refp, Axis) const;
226 Find the group-element which has both #this# and #s#
228 Score_element*common_refpoint (Score_element const* s, Axis a) const;
229 Score_element*common_refpoint (SCM elt_list, Axis a) const;
231 bool has_offset_callback_b (Offset_callback, Axis)const;
232 void add_offset_callback (Offset_callback, Axis);
233 bool has_extent_callback_b (Extent_callback, Axis)const;
234 void set_extent_callback (Extent_callback , Axis);
237 Invoke callbacks to get offset relative to parent.
239 Real get_offset (Axis a) const;
241 Set the parent refpoint of THIS to E
243 void set_parent (Score_element* e, Axis);
245 Score_element *parent_l (Axis a) const;
246 void fixup_refpoint ();
249 Score_element * unsmob_element (SCM);
253 #endif // STAFFELEM_HH