cinelerra-5.1/guicast/bcdisplay.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program 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 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program 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 this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "bcclipboard.h"
  23 #include "bcdisplay.h"
  24 #include "bcrepeater.h"
  25 #include "bcsignals.h"
  26 #include "bcsubwindow.h"
  27 #include "bcwindowbase.h"
  28 #include "bcwindowevents.h"
  29 #include "condition.h"
  30 #include "language.h"
  31 #include "mutex.h"
  32
  33 #include <pthread.h>
  34
  35 #ifdef SINGLE_THREAD
  36
  37 pthread_mutex_t BC_Display::display_lock = PTHREAD_MUTEX_INITIALIZER;
  38 BC_Display* BC_Display::display_global = 0;
  39
  40 BC_Display::BC_Display(const char *display_name)
  41 {
  42         done = 0;
  43         motion_events = 0;
  44         resize_events = 0;
  45         translation_events = 0;
  46         window_locked = 0;
  47         clipboard = 0;
  48
  49 // This function must be the first Xlib
  50 // function a multi-threaded program calls
  51         XInitThreads();
  52
  53         if(display_name && display_name[0] == 0) display_name = NULL;
  54         if((display = XOpenDisplay(display_name)) == NULL)
  55         {
  56                 printf("BC_Display::BC_Display: cannot connect to X server %s\n",
  57                         display_name);
  58                 if(getenv("DISPLAY") == NULL)
  59         {
  60                         printf(_("'DISPLAY' environment variable not set.\n"));
  61                         exit(1);
  62                 }
  63                 else
  64 // Try again with default display.
  65                 {
  66                         if((display = XOpenDisplay(0)) == NULL)
  67                         {
  68                                 printf("BC_Display::BC_Display: cannot connect to default X server.\n");
  69                                 exit(1);
  70                         }
  71                 }
  72         }
  73
  74 // Create atoms for events
  75         SetDoneXAtom = XInternAtom(display, "BC_REPEAT_EVENT", False);
  76         RepeaterXAtom = XInternAtom(display, "BC_CLOSE_EVENT", False);
  77         DelWinXAtom = XInternAtom(display, "WM_DELETE_WINDOW", False);
  78         ProtoXAtom = XInternAtom(display, "WM_PROTOCOLS", False);
  79
  80
  81 // Start event handling
  82         event_thread = new BC_WindowEvents(this);
  83         event_thread->start();
  84
  85
  86         event_lock = new Mutex("BC_Display::event_lock", 1);
  87         event_condition = new Condition(0, "BC_Display::event_condition");
  88 }
  89
  90 BC_Display::~BC_Display()
  91 {
  92 }
  93
  94 Display* BC_Display::get_display(const char *name)
  95 {
  96         pthread_mutex_lock(&display_lock);
  97         if(!display_global)
  98         {
  99                 display_global = new BC_Display(name);
 100         }
 101         pthread_mutex_unlock(&display_lock);
 102
 103         return display_global->display;
 104 }
 105
 106 int BC_Display::is_first(BC_WindowBase *window)
 107 {
 108         int result = 0;
 109
 110         if(windows.size() && windows.values[0] == window) result = 1;
 111
 112         return result;
 113 }
 114
 115 void BC_Display::dump_windows()
 116 {
 117         for(int i = 0; i < windows.size(); i++) {
 118                 printf("BC_Display::dump_windows %d window=%p window->win=0x%08jx\n",
 119                         i, windows.get(i), windows.get(i)->win);
 120         }
 121 }
 122
 123 void BC_Display::new_window(BC_WindowBase *window)
 124 {
 125 //printf("BC_Display::new_window %d\n", __LINE__);
 126         if(!clipboard)
 127         {
 128                 clipboard = new BC_Clipboard(window);
 129                 clipboard->start_clipboard();
 130         }
 131
 132 //printf("BC_Display::new_window %d\n", __LINE__);
 133         windows.append(window);
 134 //      dump_windows();
 135 //printf("BC_Display::new_window %d\n", __LINE__);
 136 }
 137
 138 void BC_Display::delete_window(BC_WindowBase *window)
 139 {
 140 //printf("BC_Display::delete_window %d\n", __LINE__);
 141         windows.remove(window);
 142 //printf("BC_Display::delete_window %d\n", __LINE__);
 143 }
 144
 145 // If the event happened in any subwindow
 146 int BC_Display::is_event_win(XEvent *event, BC_WindowBase *window)
 147 {
 148         Window event_win = event->xany.window;
 149 //printf("BC_Display::is_event_win %d\n", __LINE__);
 150         if(event_win == 0 || window->win == event_win) return 1;
 151 //printf("BC_Display::is_event_win %d\n", __LINE__);
 152         for(int i = 0; i < window->subwindows->size(); i++)
 153         {
 154                 if(is_event_win(event, window->subwindows->get(i)))
 155                 {
 156 //printf("BC_Display::is_event_win %d\n", __LINE__);
 157                         return 1;
 158                 }
 159         }
 160
 161 // Test popups in the main window only
 162         if(window->window_type == MAIN_WINDOW)
 163         {
 164 // Not all events are handled by popups.
 165                 for(int i = 0; i < window->popups.size(); i++)
 166                 {
 167                         if(window->popups.get(i)->win == event_win &&
 168                                 event->type != ConfigureNotify) return 1;
 169                 }
 170         }
 171 //printf("BC_Display::is_event_win %d\n", __LINE__);
 172         return 0;
 173 }
 174
 175 void BC_Display::loop()
 176 {
 177         const int debug = 0;
 178 if(debug) printf("BC_Display::loop %d\n", __LINE__);
 179
 180         while(!done)
 181         {
 182 // If an event is waiting, process it now.
 183 if(debug) printf("BC_Display::loop %d\n", __LINE__);
 184                 if(get_event_count())
 185                 {
 186 if(debug) printf("BC_Display::loop %d\n", __LINE__);
 187                         handle_event();
 188 if(debug) printf("BC_Display::loop %d\n", __LINE__);
 189                 }
 190                 else
 191 // Otherwise, process all compressed events & get the next event.
 192                 {
 193 if(debug) printf("BC_Display::loop %d\n", __LINE__);
 194                         lock_display("BC_Display::loop");
 195                         for(int i = 0; i < windows.size(); i++)
 196                         {
 197                                 BC_WindowBase *window = windows.get(i);
 198 if(debug) printf("BC_Display::loop %d %d %d %d\n",
 199 __LINE__,
 200 window->resize_events,
 201 window->motion_events,
 202 window->translation_events);
 203                                 if(window->resize_events)
 204                                         window->dispatch_resize_event(window->last_resize_w,
 205                                                 window->last_resize_h);
 206                                 if(window->motion_events)
 207                                         window->dispatch_motion_event();
 208 if(debug) printf("BC_Display::loop %d\n", __LINE__);
 209                                 if(window->translation_events)
 210                                         window->dispatch_translation_event();
 211                         }
 212 if(debug) printf("BC_Display::loop %d\n", __LINE__);
 213                         unlock_display();
 214 if(debug) printf("BC_Display::loop %d\n", __LINE__);
 215
 216                         handle_event();
 217 if(debug) printf("BC_Display::loop %d\n", __LINE__);
 218                 }
 219         }
 220 if(debug) printf("BC_Display::loop %d\n", __LINE__);
 221 }
 222
 223 void BC_Display::handle_event()
 224 {
 225 const int debug = 0;
 226         XEvent *event = get_event();
 227 if(debug)  printf("BC_Display::handle_event %d type=%d\n",
 228 __LINE__,
 229 event->type);
 230
 231         lock_display("BC_Display::handle_event");
 232 if(debug) printf("BC_Display::handle_event %d\n", __LINE__);
 233         for(int i = 0; i < windows.size(); i++)
 234         {
 235 // Test if event was inside window
 236 if(debug) printf("BC_Display::handle_event %d\n", __LINE__);
 237                 BC_WindowBase *window = windows.get(i);
 238 if(debug) printf("BC_Display::handle_event %d\n", __LINE__);
 239                 if(is_event_win(event, window))
 240 // Dispatch event
 241                         window->dispatch_event(event);
 242 if(debug) printf("BC_Display::handle_event %d\n", __LINE__);
 243         }
 244 if(debug) printf("BC_Display::handle_event %d\n", __LINE__);
 245         unlock_display();
 246 if(debug) printf("BC_Display::handle_event %d\n", __LINE__);
 247
 248         delete event;
 249 if(debug) printf("BC_Display::handle_event %d\n", __LINE__);
 250 }
 251
 252 // Get pending events for the given window
 253 int BC_Display::get_event_count(BC_WindowBase *window)
 254 {
 255         int result = 0;
 256         event_lock->lock("BC_WindowBase::get_event_count 2");
 257         for(int i = 0; i < common_events.size(); i++)
 258         {
 259                 XEvent *event = common_events.get(i);
 260                 if(is_event_win(event, window)) result++;
 261         }
 262         event_lock->unlock();
 263         return result;
 264 }
 265
 266 int BC_Display::get_event_count()
 267 {
 268         event_lock->lock("BC_WindowBase::get_event_count 1");
 269         int result = common_events.size();
 270         event_lock->unlock();
 271         return result;
 272 }
 273
 274 XEvent* BC_Display::get_event()
 275 {
 276         XEvent *result = 0;
 277         while(!done && !result)
 278         {
 279 //printf("BC_Display::get_event %d\n", __LINE__);
 280                 event_condition->lock("BC_WindowBase::get_event");
 281 //printf("BC_Display::get_event %d\n", __LINE__);
 282                 event_lock->lock("BC_WindowBase::get_event");
 283 //printf("BC_Display::get_event %d\n", __LINE__);
 284
 285                 if(common_events.total && !done)
 286                 {
 287                         result = common_events.values[0];
 288                         common_events.remove_number(0);
 289                 }
 290
 291                 event_lock->unlock();
 292         }
 293         return result;
 294 }
 295
 296 void BC_Display::put_event(XEvent *event)
 297 {
 298         event_lock->lock("BC_WindowBase::put_event");
 299         common_events.append(event);
 300         event_lock->unlock();
 301         event_condition->unlock();
 302 }
 303
 304 void BC_Display::set_repeat(BC_WindowBase *window, int64_t duration)
 305 {
 306 return;
 307 // test repeater database for duplicates
 308         for(int i = 0; i < repeaters.total; i++)
 309         {
 310 // Matching delay already exists
 311                 if(repeaters.values[i]->delay == duration)
 312                 {
 313                         repeaters.values[i]->start_repeating(window);
 314                         return;
 315                 }
 316         }
 317
 318         BC_Repeater *repeater = new BC_Repeater(window, duration);
 319         repeater->initialize();
 320         repeaters.append(repeater);
 321     repeater->start_repeating();
 322 }
 323
 324 void BC_Display::unset_repeat(BC_WindowBase *window, int64_t duration)
 325 {
 326         for(int i = 0; i < repeaters.size(); i++)
 327         {
 328                 if(repeaters.get(i)->delay == duration)
 329                 {
 330                         repeaters.get(i)->stop_repeating(window);
 331                 }
 332         }
 333 }
 334
 335 void BC_Display::unset_all_repeaters(BC_WindowBase *window)
 336 {
 337         for(int i = 0; i < repeaters.total; i++)
 338         {
 339                 repeaters.values[i]->stop_all_repeating(window);
 340         }
 341 }
 342
 343 void BC_Display::arm_repeat(int64_t duration)
 344 {
 345         XEvent *event = BC_WindowBase::new_xevent();
 346         XClientMessageEvent *ptr = (XClientMessageEvent*)event;
 347         event->xany.window = 0;
 348         ptr->type = ClientMessage;
 349         ptr->message_type = RepeaterXAtom;
 350         ptr->format = 32;
 351         ptr->data.l[0] = duration;
 352
 353 // Couldn't use XSendEvent since it locked up randomly.
 354         put_event(event);
 355 }
 356
 357 void BC_Display::arm_completion(BC_WindowBase *window)
 358 {
 359         XEvent *event = BC_WindowBase::new_xevent();
 360         XClientMessageEvent *ptr = (XClientMessageEvent*)event;
 361         event->xany.window = window->win;
 362         event->type = ClientMessage;
 363         ptr->message_type = SetDoneXAtom;
 364         ptr->format = 32;
 365
 366         put_event(event);
 367 }
 368
 369 void BC_Display::unlock_repeaters(int64_t duration)
 370 {
 371         for(int i = 0; i < repeaters.size(); i++)
 372         {
 373                 if(repeaters.get(i)->delay == duration)
 374                 {
 375                         repeaters.get(i)->repeat_lock->unlock();
 376                 }
 377         }
 378 }
 379
 380
 381 void BC_Display::lock_display(const char *location)
 382 {
 383         pthread_mutex_lock(&BC_Display::display_lock);
 384         ++BC_Display::display_global->window_locked;
 385         pthread_mutex_unlock(&BC_Display::display_lock);
 386
 387 //printf("BC_Display::lock_display %d %s result=%d\n", __LINE__, location, result);
 388         XLockDisplay(BC_Display::display_global->display);
 389 }
 390
 391 void BC_Display::unlock_display()
 392 {
 393         pthread_mutex_lock(&BC_Display::display_lock);
 394         --BC_Display::display_global->window_locked;
 395 //      if(BC_Display::display_global->window_locked < 0)
 396 //              BC_Display::display_global->window_locked = 0;
 397         pthread_mutex_unlock(&BC_Display::display_lock);
 398
 399 //printf("BC_Display::unlock_display %d result=%d\n", __LINE__, result);
 400         XUnlockDisplay(BC_Display::display_global->display);
 401 }
 402
 403
 404 int BC_Display::get_display_locked()
 405 {
 406         return BC_Display::display_global->window_locked;
 407 }
 408
 409
 410 #endif