1 /*
2 This file is part of LilyPond, the GNU music typesetter.
3
4 Copyright (C) 1996--2020 Han-Wen Nienhuys
5
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
10
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #ifndef GROB_HH
21 #define GROB_HH
22
23 #include "box.hh"
24 #include "virtual-methods.hh"
25 #include "diagnostics.hh"
26 #include "dimension-cache.hh"
27 #include "grob-interface.hh"
28 #include "lily-proto.hh"
29
30 #include <set>
31
32 class Grob : public Smob<Grob>, public Diagnostics
33 {
34 public:
35 int print_smob (SCM, scm_print_state *) const;
36 SCM mark_smob () const;
37 static const char *const type_p_name_;
38 virtual ~Grob ();
39 private:
40 VIRTUAL_CLASS_NAME (Grob);
41
42 void init ();
43
44 protected:
45 /* data */
46 mutable Dimension_cache dim_cache_[NO_AXES];
47 Output_def *layout_;
48 Grob *original_;
49
50 /* SCM data */
51 SCM immutable_property_alist_;
52 SCM mutable_property_alist_;
53 SCM object_alist_;
54
55 /*
56 If this is a property, it accounts for 25% of the property
57 lookups.
58 */
59 SCM interfaces_;
60
61 void substitute_object_links (SCM, SCM);
62 Real get_offset (Axis a) const;
63 SCM try_callback (SCM, SCM);
64 SCM try_callback_on_alist (SCM *, SCM, SCM);
65 void internal_set_value_on_alist (SCM *alist, SCM sym, SCM val);
66
67 /* messages */
68 Input *origin () const override;
69
70 public:
71
72 /* friends */
73 friend class System;
74 friend SCM ly_grob_properties (SCM);
75 friend SCM ly_grob_basic_properties (SCM);
76
77 /* standard callbacks */
78 DECLARE_SCHEME_CALLBACK (x_parent_positioning, (SCM));
79 DECLARE_SCHEME_CALLBACK (y_parent_positioning, (SCM));
80 DECLARE_SCHEME_CALLBACK (pure_stencil_height, (SCM smob, SCM, SCM));
81 DECLARE_SCHEME_CALLBACK (stencil_height, (SCM smob));
82 DECLARE_SCHEME_CALLBACK (stencil_width, (SCM smob));
83 DECLARE_SCHEME_CALLBACK (pure_simple_vertical_skylines_from_extents, (SCM smob, SCM, SCM));
84 DECLARE_SCHEME_CALLBACK (simple_vertical_skylines_from_extents, (SCM smob));
85 DECLARE_SCHEME_CALLBACK (vertical_skylines_from_stencil, (SCM smob));
86 DECLARE_SCHEME_CALLBACK (pure_vertical_skylines_from_element_stencils, (SCM smob, SCM, SCM));
87 DECLARE_SCHEME_CALLBACK (vertical_skylines_from_element_stencils, (SCM smob));
88 DECLARE_SCHEME_CALLBACK (pure_simple_horizontal_skylines_from_extents, (SCM smob, SCM, SCM));
89 DECLARE_SCHEME_CALLBACK (simple_horizontal_skylines_from_extents, (SCM smob));
90 DECLARE_SCHEME_CALLBACK (horizontal_skylines_from_stencil, (SCM smob));
91 DECLARE_SCHEME_CALLBACK (pure_horizontal_skylines_from_element_stencils, (SCM smob, SCM, SCM));
92 DECLARE_SCHEME_CALLBACK (horizontal_skylines_from_element_stencils, (SCM smob));
93
94 /* R/O access */
layout() const95 Output_def *layout () const { return layout_; }
original() const96 Grob *original () const { return original_; }
interfaces() const97 SCM interfaces () const { return interfaces_; }
98
99 /* life & death */
100 Grob (SCM basic_props);
101 Grob (Grob const &);
102 virtual Grob *clone () const = 0;
103
104 /* forced death */
105 void suicide ();
106 bool is_live () const;
107
108 /* naming. */
109 std::string name () const;
110
111 /* Properties */
112 SCM get_property_alist_chain (SCM) const;
113 SCM internal_get_property (SCM symbol) const;
114 SCM internal_get_property_data (SCM symbol) const;
115 SCM internal_get_pure_property (SCM symbol, vsize start, vsize end) const;
116 SCM internal_get_maybe_pure_property (SCM symbol, bool pure,
117 vsize start, vsize end) const;
118 SCM internal_get_non_callback_marker_property_data (SCM symbol) const;
119 SCM internal_get_object (SCM symbol) const;
120 void internal_set_object (SCM sym, SCM val);
121 void internal_del_property (SCM symbol);
122 void instrumented_set_property (SCM, SCM, char const *, int, char const *);
123 void internal_set_property (SCM sym, SCM val);
124
125 /* causes */
126 Stream_event *event_cause () const;
127 Stream_event *ultimate_event_cause () const;
128
129 /* class hierarchy */
130 virtual System *get_system () const;
131 static System *get_system (Grob *);
132 virtual void do_break_processing ();
133 virtual Grob *find_broken_piece (System *) const;
134 virtual void break_breakable_item (System *);
135 virtual void derived_mark () const;
136 virtual void handle_broken_dependencies ();
137 virtual void handle_prebroken_dependencies ();
internal_set_as_bound_of_spanner(Spanner *,Direction)138 virtual bool internal_set_as_bound_of_spanner (Spanner *, Direction) { return false; }
139
140 /* printing */
141 Stencil *get_stencil () const;
142 Stencil get_print_stencil () const;
143
144 /* interfaces */
145 bool internal_has_interface (SCM intf) const;
146
147 /* offsets */
148 void translate_axis (Real, Axis);
149 Real relative_coordinate (Grob const *refp, Axis) const;
150 Real parent_relative (Grob const *refp, Axis) const;
151 Real pure_relative_y_coordinate (Grob const *refp, vsize start, vsize end);
152 Real maybe_pure_coordinate (Grob const *refp, Axis a, bool pure, vsize start, vsize end);
153
154 /* extents */
155 Interval extent (Grob const *refpoint, Axis) const;
156 void flush_extent_cache (Axis);
157 virtual Interval pure_y_extent (Grob *refpoint, vsize start, vsize end);
158 Interval maybe_pure_extent (Grob *refpoint, Axis, bool pure,
159 vsize start, vsize end);
160
161 /* refpoints */
162 Grob *common_refpoint (Grob const *s, Axis a) const;
set_x_parent(Grob * e)163 void set_x_parent (Grob *e) { dim_cache_[X_AXIS].parent_ = e; }
set_y_parent(Grob * e)164 void set_y_parent (Grob *e) { dim_cache_[Y_AXIS].parent_ = e; }
set_parent(Grob * e,Axis a)165 void set_parent (Grob *e, Axis a) { dim_cache_[a].parent_ = e; }
get_x_parent() const166 Grob *get_x_parent () const { return dim_cache_[X_AXIS].parent_; }
get_y_parent() const167 Grob *get_y_parent () const { return dim_cache_[Y_AXIS].parent_; }
get_parent(Axis a) const168 Grob *get_parent (Axis a) const { return dim_cache_[a].parent_; }
169 void fixup_refpoint ();
170
171 /* vertical ordering */
172 static bool internal_vertical_less (Grob *g1, Grob *g2, bool pure);
173 static Grob *get_root_vertical_alignment (Grob *g);
174 static Grob *get_vertical_axis_group (Grob *g);
175 static bool vertical_less (Grob *g1, Grob *g2);
176 static bool pure_vertical_less (Grob *g1, Grob *g2);
177 static int get_vertical_axis_group_index (Grob *g);
178
179 /* skylines */
180 virtual Interval_t<int> spanned_rank_interval () const = 0;
181 bool check_cross_staff (Grob *common);
182 static bool less (Grob *g1, Grob *g2);
183 static SCM maybe_pure_internal_simple_skylines_from_extents (Grob *, Axis, bool, int, int, bool, bool);
184 static SCM internal_skylines_from_element_stencils (Grob *me, Axis a, bool pure, int beg, int end);
185 static SCM internal_skylines_from_element_stencils (SCM, Axis);
186 };
187
188 template <class T>
has_interface(Grob const * g)189 inline bool has_interface (Grob const *g)
190 {
191 return g && g->internal_has_interface (Grob_interface<T>::interface_symbol_);
192 }
193
194 /* unification */
195 void uniquify (std::vector<Grob *> &);
196
197 /* refpoints */
198 Grob *common_refpoint_of_list (SCM elt_list, Grob *, Axis a);
199 Grob *common_refpoint_of_array (std::vector<Grob *> const &, Grob *, Axis a);
200 Grob *common_refpoint_of_array (std::set<Grob *> const &, Grob *, Axis a);
201 System *get_root_system (Grob *me);
202
203 /* extents */
204 Interval robust_relative_extent (Grob *, Grob *, Axis);
205
206 /* offset/extent callbacks. */
207 void add_offset_callback (Grob *g, SCM proc, Axis a);
208 void chain_offset_callback (Grob *g, SCM proc, Axis a);
209 void chain_callback (Grob *g, SCM proc, SCM sym);
210 SCM axis_offset_symbol (Axis a);
211 SCM axis_parent_positioning (Axis a);
212
213 SCM call_pure_function (SCM unpure, SCM args, vsize start, vsize end);
214
215 void set_nested_property (Grob *, SCM property_path, SCM value);
216
217 #endif /* GROB_HH */
218