summaryrefslogtreecommitdiff
path: root/libs/ardour/ardour/presentation_info.h
blob: c0184dfa2032e51f3850d6d255dc31e2aac75c98 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
/*
 * Copyright (C) 2016-2017 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2016-2019 Robin Gareus <robin@gareus.org>
 * Copyright (C) 2018 Len Ovens <len@ovenwerks.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef __libardour_presentation_info_h__
#define __libardour_presentation_info_h__

#include <iostream>
#include <string>

#include <stdint.h>

#include "pbd/signals.h"
#include "pbd/stateful.h"
#include "pbd/properties.h"

#include "ardour/libardour_visibility.h"

class XMLNode;

namespace ARDOUR {

namespace Properties {
	LIBARDOUR_API extern PBD::PropertyDescriptor<uint32_t> order;
	LIBARDOUR_API extern PBD::PropertyDescriptor<uint32_t> color;
	LIBARDOUR_API extern PBD::PropertyDescriptor<bool> selected;
	/* we use this; declared in region.cc */
	LIBARDOUR_API extern PBD::PropertyDescriptor<bool> hidden;
}

class LIBARDOUR_API PresentationInfo : public PBD::Stateful
{
  public:

	/* a PresentationInfo object exists to share information between
	 * different user interfaces (e.g. GUI and a Mackie Control surface)
	 * about:
	 *
	 *     - ordering
	 *     - selection status
	 *     - visibility
	 *     - object identity
	 *
	 * ORDERING
	 *
	 * One UI takes control of ordering by setting the "order" value for
	 * the PresentationInfo component of every Stripable object. In Ardour,
	 * this is done by the GUI (mostly because it is very hard for the user
	 * to re-order things on a control surface).
	 *
	 * Ordering is a complex beast, however. Different user interfaces may
	 * display things in different ways. For example, the GUI of Ardour
	 * allows the user to mix busses in between tracks. A control surface
	 * may do the same, but may also allow the user to press a button that
	 * makes it show only busses, or only MIDI tracks. At that point, the
	 * ordering on the surface differs from the ordering in the GUI.
	 *
	 * There are several pathways for the order being set:
	 *
	 *   - object created during session loading from XML
	 *   - numeric order will be set during ::set_state(), based on
	 *   - type will be set during ctor call
	 *
	 *   - object created in response to user request
	 *   - numeric order will be set by Session, before adding to container.
	 *   - type set during ctor call
	 *
	 *
	 * OBJECT IDENTITY
	 *
	 * Control surfaces/protocols often need to be able to get a handle on
	 * an object identified only abstractly, such as the "5th audio track"
	 * or "the master out". A PresentationInfo object uniquely identifies
	 * all objects in this way through the combination of its _order member
	 * and part of its _flags member. The _flags member identifies the type
	 * of object, as well as selection/hidden status. The type may never
	 * change after construction (not strictly the constructor itself, but
	 * a more generalized notion of construction, as in "ready to use").
	 *
	 * VISIBILITY
	 *
	 * When an object is hidden, its _flags member will have the Hidden
	 * bit set.
	 *
	 *
	 */

	enum Flag {
		/* Type information */
		AudioTrack = 0x1,
		MidiTrack = 0x2,
		AudioBus = 0x4,
		MidiBus = 0x8,
		VCA = 0x10,
		MasterOut = 0x20,
		MonitorOut = 0x40,
		Auditioner = 0x80,
#ifdef MIXBUS
		Mixbus = 0x1000,
#endif
		/* These are for sharing Stripable states between the GUI and other
		 * user interfaces/control surfaces
		 */
		Hidden = 0x100,
#ifdef MIXBUS
		MixbusEditorHidden = 0x800,
#endif
		/* single bit indicates that the group order is set */
		OrderSet = 0x400,

		/* bus type for monitor mixes */
		FoldbackBus = 0x2000,

		/* special mask to delect out "state" bits */
		StatusMask = (Hidden),
		/* special mask to delect select type bits */
		TypeMask = (AudioBus|AudioTrack|MidiTrack|MidiBus|VCA|MasterOut|MonitorOut|Auditioner|FoldbackBus)
	};

	static const Flag AllStripables; /* mask to use for any route or VCA (but not auditioner) */
	static const Flag MixerStripables; /* mask to use for any route or VCA (but not auditioner or foldbackbus) */
	static const Flag AllRoutes; /* mask to use for any route include master+monitor, but not auditioner */
	static const Flag MixerRoutes; /* mask to use for any route include master+monitor, but not auditioner or foldbackbus*/
	static const Flag Route;     /* mask for any route (bus or track */
	static const Flag Track;     /* mask to use for any track */
	static const Flag Bus;       /* mask to use for any bus */

	typedef uint32_t order_t;
	typedef uint32_t color_t;

	PresentationInfo (Flag f);
	PresentationInfo (order_t o, Flag f);
	PresentationInfo (PresentationInfo const &);

	static const order_t max_order;

	PresentationInfo::Flag flags() const { return _flags; }
	order_t  order() const { return _order; }
	color_t  color() const { return _color; }

	bool color_set() const;

	void set_color (color_t);
	void set_hidden (bool yn);
	void set_flags (Flag f) { _flags = f; }

	bool order_set() const { return _flags & OrderSet; }

	int selection_cnt() const { return _selection_cnt; }

	bool hidden() const { return _flags & Hidden; }
	bool special(bool with_master = true) const { return _flags & ((with_master ? MasterOut : 0)|MonitorOut|Auditioner); }

	bool flag_match (Flag f) const {
		/* no flags, match all */

		if (f == Flag (0)) {
			return true;
		}

		if (f & StatusMask) {
			/* status bits set, must match them */
			if ((_flags & StatusMask) != (f & StatusMask)) {
				return false;
			}
		}

		/* Generic flags in f, match the right stuff */

		if (f == Bus && (_flags & Bus)) {
			/* some kind of bus */
			return true;
		}
		if (f == Track && (_flags & Track)) {
			/* some kind of track */
			return true;
		}
		if (f == Route && (_flags & Route)) {
			/* any kind of route, but not master, monitor in
			   or auditioner.
			 */
			return true;
		}

		if (f == AllRoutes && (_flags & AllRoutes)) {
			/* any kind of route, but not auditioner. Ask for that
			   specifically.
			*/
			return true;
		}

		if (f == AllStripables && (_flags & AllStripables)) {
			/* any kind of stripable, but not auditioner. Ask for that
			   specifically.
			*/
			return true;
		}

		/* check for any matching type bits.
		 *
		 * Do comparisoon without status mask or order set bits - we
		 * already checked that above.
		 */

		return ((f & TypeMask) & _flags);
	}

	int set_state (XMLNode const&, int);
	XMLNode& get_state ();

	bool operator==(PresentationInfo const& other) {
		return (_order == other.order()) && (_flags == other.flags());
	}

	bool operator!=(PresentationInfo const& other) {
		return (_order != other.order()) || (_flags != other.flags());
	}

	PresentationInfo& operator= (PresentationInfo const& other);

	static Flag get_flags (XMLNode const& node);
	static std::string state_node_name;

	/* for things concerned about *any* PresentationInfo.
	 */

	static PBD::Signal1<void,PBD::PropertyChange const &> Change;
	static void send_static_change (const PBD::PropertyChange&);

	static void make_property_quarks ();

  protected:
	friend class ChangeSuspender;
	static void suspend_change_signal ();
	static void unsuspend_change_signal ();

  public:
	class ChangeSuspender {
          public:
		ChangeSuspender() {
			PresentationInfo::suspend_change_signal ();
		}
		~ChangeSuspender() {
			PresentationInfo::unsuspend_change_signal ();
		}
	};

  protected:
	friend class Stripable;
	void set_order (order_t order);

  private:
	order_t _order;
	Flag    _flags;
	color_t _color;
	int     _selection_cnt;

	static PBD::PropertyChange _pending_static_changes;
	static Glib::Threads::Mutex static_signal_lock;
	static int _change_signal_suspended;

	static int selection_counter;
};

}

std::ostream& operator<<(std::ostream& o, ARDOUR::PresentationInfo const& rid);

#endif /* __libardour_presentation_info_h__ */