gtk2_ardour/region_selection.cc

   1 /*
   2     Copyright (C) 2006 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 <algorithm>
  20
  21 #include "ardour/region.h"
  22
  23 #include "gui_thread.h"
  24 #include "region_view.h"
  25 #include "region_selection.h"
  26 #include "time_axis_view.h"
  27
  28 using namespace std;
  29 using namespace ARDOUR;
  30 using namespace PBD;
  31
  32 /** Construct an empty RegionSelection.
  33  */
  34 RegionSelection::RegionSelection ()
  35 {
  36         RegionView::RegionViewGoingAway.connect (death_connection, MISSING_INVALIDATOR, ui_bind (&RegionSelection::remove_it, this, _1), gui_context());
  37
  38         _current_start = 0;
  39         _current_end = 0;
  40 }
  41
  42 /** Copy constructor.
  43  *  @param other RegionSelection to copy.
  44  */
  45 RegionSelection::RegionSelection (const RegionSelection& other)
  46         : std::list<RegionView*>()
  47 {
  48         RegionView::RegionViewGoingAway.connect (death_connection, MISSING_INVALIDATOR, ui_bind (&RegionSelection::remove_it, this, _1), gui_context());
  49
  50         _current_start = other._current_start;
  51         _current_end = other._current_end;
  52
  53         for (RegionSelection::const_iterator i = other.begin(); i != other.end(); ++i) {
  54                 add (*i);
  55         }
  56 }
  57
  58 /** operator= to set a RegionSelection to be the same as another.
  59  *  @param other Other RegionSelection.
  60  */
  61 RegionSelection&
  62 RegionSelection::operator= (const RegionSelection& other)
  63 {
  64         if (this != &other) {
  65
  66                 clear_all();
  67
  68                 _current_start = other._current_start;
  69                 _current_end = other._current_end;
  70
  71                 for (RegionSelection::const_iterator i = other.begin(); i != other.end(); ++i) {
  72                         add (*i);
  73                 }
  74         }
  75
  76         return *this;
  77 }
  78
  79 /** Empty this RegionSelection.
  80  */
  81 void
  82 RegionSelection::clear_all()
  83 {
  84         clear();
  85         _bylayer.clear();
  86         _current_start = 0;
  87         _current_end = 0;
  88 }
  89
  90 /**
  91  *  @param rv RegionView.
  92  *  @return true if this selection contains rv.
  93  */
  94 bool RegionSelection::contains (RegionView* rv) const
  95 {
  96         return find (begin(), end(), rv) != end();
  97 }
  98
  99 /** Add a region to the selection.
 100  *  @param rv Region to add.
 101  *  @return false if we already had the region, otherwise true.
 102  */
 103 bool
 104 RegionSelection::add (RegionView* rv)
 105 {
 106         if (contains (rv)) {
 107                 /* we already have it */
 108                 return false;
 109         }
 110
 111         if (rv->region()->first_frame() < _current_start || empty()) {
 112                 _current_start = rv->region()->first_frame();
 113         }
 114
 115         if (rv->region()->last_frame() > _current_end || empty()) {
 116                 _current_end = rv->region()->last_frame();
 117         }
 118
 119         push_back (rv);
 120
 121         /* add to layer sorted list */
 122
 123         add_to_layer (rv);
 124
 125         return true;
 126 }
 127
 128 /** Remove a region from the selection.
 129  *  @param rv Region to remove.
 130  */
 131 void
 132 RegionSelection::remove_it (RegionView *rv)
 133 {
 134         remove (rv);
 135 }
 136
 137 /** Remove a region from the selection.
 138  *  @param rv Region to remove.
 139  *  @return true if the region was in the selection, false if not.
 140  */
 141 bool
 142 RegionSelection::remove (RegionView* rv)
 143 {
 144         RegionSelection::iterator r;
 145
 146         if ((r = find (begin(), end(), rv)) != end()) {
 147
 148                 // remove from layer sorted list
 149                 _bylayer.remove (rv);
 150
 151                 if (size() == 1) {
 152
 153                         /* this is the last one, so when we delete it
 154                            we will be empty.
 155                         */
 156
 157                         _current_start = 0;
 158                         _current_end = 0;
 159
 160                 } else {
 161
 162                         boost::shared_ptr<Region> region ((*r)->region());
 163
 164                         if (region->first_frame() == _current_start) {
 165
 166                                 /* reset current start */
 167
 168                                 nframes_t ref = max_frames;
 169
 170                                 for (RegionSelection::iterator i = begin (); i != end(); ++i) {
 171                                         if (region->first_frame() < ref) {
 172                                                 ref = region->first_frame();
 173                                         }
 174                                 }
 175
 176                                 _current_start = ref;
 177
 178                         }
 179
 180                         if (region->last_frame() == _current_end) {
 181
 182                                 /* reset current end */
 183
 184                                 nframes_t ref = 0;
 185
 186                                 for (RegionSelection::iterator i = begin (); i != end(); ++i) {
 187                                         if (region->first_frame() > ref) {
 188                                                 ref = region->first_frame();
 189                                         }
 190                                 }
 191
 192                                 _current_end = ref;
 193                         }
 194                 }
 195
 196                 erase (r);
 197
 198                 return true;
 199         }
 200
 201         return false;
 202 }
 203
 204 /** Add a region to the list sorted by layer.
 205  *  @param rv Region to add.
 206  */
 207 void
 208 RegionSelection::add_to_layer (RegionView * rv)
 209 {
 210         // insert it into layer sorted position
 211
 212         list<RegionView*>::iterator i;
 213
 214         for (i = _bylayer.begin(); i != _bylayer.end(); ++i)
 215         {
 216                 if (rv->region()->layer() < (*i)->region()->layer()) {
 217                         _bylayer.insert(i, rv);
 218                         return;
 219                 }
 220         }
 221
 222         // insert at end if we get here
 223         _bylayer.insert(i, rv);
 224 }
 225
 226 struct RegionSortByTime {
 227     bool operator() (const RegionView* a, const RegionView* b) const {
 228             return a->region()->position() < b->region()->position();
 229     }
 230 };
 231
 232
 233 /**
 234  *  @param foo List which will be filled with the selection's regions
 235  *  sorted by position.
 236  */
 237 void
 238 RegionSelection::by_position (list<RegionView*>& foo) const
 239 {
 240         list<RegionView*>::const_iterator i;
 241         RegionSortByTime sorter;
 242
 243         for (i = _bylayer.begin(); i != _bylayer.end(); ++i) {
 244                 foo.push_back (*i);
 245         }
 246
 247         foo.sort (sorter);
 248         return;
 249 }
 250
 251 struct RegionSortByTrack {
 252     bool operator() (const RegionView* a, const RegionView* b) const {
 253
 254             /* really, track and position */
 255
 256             if (a->get_trackview().order() == b->get_trackview().order()) {
 257                     return a->region()->position() < b->region()->position();
 258             } else {
 259                     return a->get_trackview().order() < b->get_trackview().order();
 260             }
 261     }
 262 };
 263
 264
 265 /**
 266  *  @param List which will be filled with the selection's regions
 267  *  sorted by track and position.
 268  */
 269 void
 270 RegionSelection::by_track (list<RegionView*>& foo) const
 271 {
 272         list<RegionView*>::const_iterator i;
 273         RegionSortByTrack sorter;
 274
 275         for (i = _bylayer.begin(); i != _bylayer.end(); ++i) {
 276                 foo.push_back (*i);
 277         }
 278
 279         foo.sort (sorter);
 280         return;
 281 }
 282
 283 /**
 284  *  @param Sort the selection by position and track.
 285  */
 286 void
 287 RegionSelection::sort_by_position_and_track ()
 288 {
 289         RegionSortByTrack sorter;
 290         sort (sorter);
 291 }
 292
 293 /**
 294  *  @param tv Track.
 295  *  @return true if any of the selection's regions are on tv.
 296  */
 297 bool
 298 RegionSelection::involves (const TimeAxisView& tv) const
 299 {
 300         for (RegionSelection::const_iterator i = begin(); i != end(); ++i) {
 301                 if (&(*i)->get_trackview() == &tv) {
 302                         return true;
 303                 }
 304         }
 305         return false;
 306 }
 307