libs/ardour/presentation_info.cc

   1 /*
   2     Copyright (C) 2016 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17 */
  18
  19 #include <sstream>
  20 #include <typeinfo>
  21
  22 #include <cassert>
  23
  24 #include "pbd/debug.h"
  25 #include "pbd/enum_convert.h"
  26 #include "pbd/enumwriter.h"
  27 #include "pbd/error.h"
  28 #include "pbd/failed_constructor.h"
  29 #include "pbd/stacktrace.h"
  30 #include "pbd/xml++.h"
  31
  32 #include "ardour/presentation_info.h"
  33 #include "ardour/selection.h"
  34
  35 #include "pbd/i18n.h"
  36
  37 namespace PBD {
  38         DEFINE_ENUM_CONVERT(ARDOUR::PresentationInfo::Flag);
  39 }
  40
  41 using namespace ARDOUR;
  42 using namespace PBD;
  43 using std::string;
  44
  45 string PresentationInfo::state_node_name = X_("PresentationInfo");
  46
  47 PBD::Signal1<void,PropertyChange const &> PresentationInfo::Change;
  48 Glib::Threads::Mutex PresentationInfo::static_signal_lock;
  49 int PresentationInfo::_change_signal_suspended = 0;
  50 PBD::PropertyChange PresentationInfo::_pending_static_changes;
  51 int PresentationInfo::selection_counter= 0;
  52
  53 namespace ARDOUR {
  54         namespace Properties {
  55                 PBD::PropertyDescriptor<bool>     selected;
  56                 PBD::PropertyDescriptor<uint32_t> order;
  57                 PBD::PropertyDescriptor<uint32_t> color;
  58         }
  59 }
  60
  61 void
  62 PresentationInfo::suspend_change_signal ()
  63 {
  64         g_atomic_int_add (&_change_signal_suspended, 1);
  65 }
  66
  67 void
  68 PresentationInfo::unsuspend_change_signal ()
  69 {
  70         Glib::Threads::Mutex::Lock lm (static_signal_lock);
  71
  72         if (g_atomic_int_get (const_cast<gint*> (&_change_signal_suspended)) == 1) {
  73
  74                 /* atomically grab currently pending flags */
  75
  76                 PropertyChange pc = _pending_static_changes;
  77                 _pending_static_changes.clear ();
  78
  79                 if (!pc.empty()) {
  80
  81                         /* emit the signal with further emissions still blocked
  82                          * by _change_signal_suspended, but not by the lock.
  83                          *
  84                          * This means that if the handlers modify other PI
  85                          * states, the signal for that won't be sent while they
  86                          * are handling the current signal.
  87                          */
  88                         lm.release ();
  89                         Change (pc); /* EMIT SIGNAL */
  90                         lm.acquire ();
  91                 }
  92         }
  93
  94         g_atomic_int_add (const_cast<gint*>(&_change_signal_suspended), -1);
  95 }
  96
  97 void
  98 PresentationInfo::send_static_change (const PropertyChange& what_changed)
  99 {
 100         if (what_changed.empty()) {
 101                 return;
 102         }
 103
 104
 105         if (g_atomic_int_get (&_change_signal_suspended)) {
 106                 Glib::Threads::Mutex::Lock lm (static_signal_lock);
 107                 _pending_static_changes.add (what_changed);
 108                 return;
 109         }
 110
 111         Change (what_changed);
 112 }
 113
 114 const PresentationInfo::order_t PresentationInfo::max_order = UINT32_MAX;
 115 const PresentationInfo::Flag PresentationInfo::Bus = PresentationInfo::Flag (PresentationInfo::AudioBus|PresentationInfo::MidiBus);
 116 const PresentationInfo::Flag PresentationInfo::Track = PresentationInfo::Flag (PresentationInfo::AudioTrack|PresentationInfo::MidiTrack);
 117 const PresentationInfo::Flag PresentationInfo::Route = PresentationInfo::Flag (PresentationInfo::Bus|PresentationInfo::Track);
 118 const PresentationInfo::Flag PresentationInfo::AllRoutes = PresentationInfo::Flag (PresentationInfo::Route|PresentationInfo::MasterOut|PresentationInfo::MonitorOut);
 119 const PresentationInfo::Flag PresentationInfo::AllStripables = PresentationInfo::Flag (PresentationInfo::AllRoutes|PresentationInfo::VCA);
 120
 121 void
 122 PresentationInfo::make_property_quarks ()
 123 {
 124         Properties::selected.property_id = g_quark_from_static_string (X_("selected"));
 125         DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for selected = %1\n",    Properties::selected.property_id));
 126         Properties::color.property_id = g_quark_from_static_string (X_("color"));
 127         DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for color = %1\n",       Properties::color.property_id));
 128         Properties::order.property_id = g_quark_from_static_string (X_("order"));
 129         DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for order = %1\n",       Properties::order.property_id));
 130 }
 131
 132 PresentationInfo::PresentationInfo (Flag f)
 133         : _order (0)
 134         , _flags (Flag (f & ~OrderSet))
 135         , _color (0)
 136 {
 137         /* OrderSet is not set */
 138 }
 139
 140 PresentationInfo::PresentationInfo (order_t o, Flag f)
 141         : _order (o)
 142         , _flags (Flag (f | OrderSet))
 143         , _color (0)
 144 {
 145         /* OrderSet is set */
 146 }
 147 PresentationInfo::PresentationInfo (PresentationInfo const& other)
 148         : _order (other.order())
 149         , _flags (other.flags())
 150         , _color (other.color())
 151 {
 152 }
 153
 154 XMLNode&
 155 PresentationInfo::get_state ()
 156 {
 157         XMLNode* node = new XMLNode (state_node_name);
 158         node->set_property ("order", _order);
 159         node->set_property ("flags", _flags);
 160         node->set_property ("color", _color);
 161
 162         return *node;
 163 }
 164
 165 int
 166 PresentationInfo::set_state (XMLNode const& node, int /* version */)
 167 {
 168         if (node.name() != state_node_name) {
 169                 return -1;
 170         }
 171
 172         PropertyChange pc;
 173
 174         order_t o;
 175         if (node.get_property (X_("order"), o)) {
 176                 if (o != _order) {
 177                         pc.add (Properties::order);
 178                         _order = o;
 179                 }
 180                 _order = o; // huh?
 181         }
 182
 183         Flag f;
 184         if (node.get_property (X_("flags"), f)) {
 185                 if ((f&Hidden) != (_flags&Hidden)) {
 186                         pc.add (Properties::hidden);
 187                 }
 188                 _flags = f;
 189         }
 190
 191         color_t c;
 192         if (node.get_property (X_("color"), c)) {
 193                 if (c != _color) {
 194                         pc.add (Properties::color);
 195                         _color = c;
 196                 }
 197         }
 198
 199         send_change (PropertyChange (pc));
 200
 201         return 0;
 202
 203 }
 204
 205 PresentationInfo::Flag
 206 PresentationInfo::get_flags (XMLNode const& node)
 207 {
 208         XMLNodeList nlist = node.children ();
 209
 210         for (XMLNodeConstIterator niter = nlist.begin(); niter != nlist.end(); ++niter){
 211                 XMLNode* child = *niter;
 212
 213                 if (child->name() == PresentationInfo::state_node_name) {
 214                         Flag f;
 215                         if (child->get_property (X_("flags"), f)) {
 216                                 return f;
 217                         }
 218                 }
 219         }
 220         return Flag (0);
 221 }
 222
 223 void
 224 PresentationInfo::set_color (PresentationInfo::color_t c)
 225 {
 226         if (c != _color) {
 227                 _color = c;
 228                 send_change (PropertyChange (Properties::color));
 229                 send_static_change (PropertyChange (Properties::color));
 230         }
 231 }
 232
 233 bool
 234 PresentationInfo::color_set () const
 235 {
 236         /* all RGBA values zero? not set.
 237          *
 238          * this is heuristic, but it is fairly realistic. who will ever set
 239          * a color to completely transparent black? only the constructor ..
 240          */
 241         return _color != 0;
 242 }
 243
 244 void
 245 PresentationInfo::set_hidden (bool yn)
 246 {
 247         if (yn != hidden()) {
 248
 249                 if (yn) {
 250                         _flags = Flag (_flags | Hidden);
 251                 } else {
 252                         _flags = Flag (_flags & ~Hidden);
 253                 }
 254
 255                 send_change (PropertyChange (Properties::hidden));
 256                 send_static_change (PropertyChange (Properties::hidden));
 257         }
 258 }
 259
 260 void
 261 PresentationInfo::set_order (order_t order)
 262 {
 263         _flags = Flag (_flags|OrderSet);
 264
 265         if (order != _order) {
 266                 _order = order;
 267                 send_change (PropertyChange (Properties::order));
 268                 send_static_change (PropertyChange (Properties::order));
 269         }
 270 }
 271
 272 PresentationInfo&
 273 PresentationInfo::operator= (PresentationInfo const& other)
 274 {
 275         if (this != &other) {
 276                 _order = other.order();
 277                 _flags = other.flags();
 278                 _color = other.color();
 279         }
 280
 281         return *this;
 282 }
 283
 284 std::ostream&
 285 operator<<(std::ostream& o, ARDOUR::PresentationInfo const& pi)
 286 {
 287         return o << pi.order() << '/' << enum_2_string (pi.flags()) << '/' << pi.color();
 288 }