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         if( !clipboard ) {
 126                 clipboard = new BC_Clipboard(window);
 127                 clipboard->start_clipboard();
 128         }
 129
 130         windows.append(window);
 131 //      dump_windows();
 132 }
 133
 134 void BC_Display::delete_window(BC_WindowBase *window)
 135 {
 136         windows.remove(window);
 137 }
 138
 139 // If the event happened in any subwindow
 140 int BC_Display::is_event_win(XEvent *event, BC_WindowBase *window)
 141 {
 142         Window event_win = event->xany.window;
 143         if(event_win == 0 || window->win == event_win) return 1;
 144         for(int i = 0; i < window->subwindows->size(); i++) {
 145                 if(is_event_win(event, window->subwindows->get(i))) {
 146                         return 1;
 147                 }
 148         }
 149
 150 // Test popups in the main window only
 151         if(window->window_type == MAIN_WINDOW)
 152         {
 153 // Not all events are handled by popups.
 154                 for(int i = 0; i < window->popups.size(); i++)
 155                 {
 156                         if(window->popups.get(i)->win == event_win &&
 157                                 event->type != ConfigureNotify) return 1;
 158                 }
 159         }
 160 //printf("BC_Display::is_event_win %d\n", __LINE__);
 161         return 0;
 162 }
 163
 164 void BC_Display::loop()
 165 {
 166
 167         while(!done)
 168         {
 169 // If an event is waiting, process it now.
 170                 if(get_event_count())
 171                 {
 172                         handle_event();
 173                 }
 174                 else
 175 // Otherwise, process all compressed events & get the next event.
 176                 {
 177                         lock_display("BC_Display::loop");
 178                         for(int i = 0; i < windows.size(); i++)
 179                         {
 180                                 BC_WindowBase *window = windows.get(i);
 181 // printf("BC_Display::loop %d %d %d %d\n", __LINE__,
 182 // window->resize_events, window->motion_events, window->translation_events);
 183                                 if(window->resize_events)
 184                                         window->dispatch_resize_event(window->last_resize_w,
 185                                                 window->last_resize_h);
 186                                 if(window->motion_events)
 187                                         window->dispatch_motion_event();
 188                                 if(window->translation_events)
 189                                         window->dispatch_translation_event();
 190                         }
 191                         unlock_display();
 192
 193                         handle_event();
 194                 }
 195         }
 196 }
 197
 198 void BC_Display::handle_event()
 199 {
 200         XEvent *event = get_event();
 201 // printf("BC_Display::handle_event %d type=%d\n", __LINE__, event->type);
 202
 203         lock_display("BC_Display::handle_event");
 204         for(int i = 0; i < windows.size(); i++)
 205         {
 206 // Test if event was inside window
 207                 BC_WindowBase *window = windows.get(i);
 208                 if(is_event_win(event, window))
 209 // Dispatch event
 210                         window->dispatch_event(event);
 211         }
 212         unlock_display();
 213
 214         delete event;
 215 }
 216
 217 // Get pending events for the given window
 218 int BC_Display::get_event_count(BC_WindowBase *window)
 219 {
 220         int result = 0;
 221         event_lock->lock("BC_WindowBase::get_event_count 2");
 222         for(int i = 0; i < common_events.size(); i++)
 223         {
 224                 XEvent *event = common_events.get(i);
 225                 if(is_event_win(event, window)) result++;
 226         }
 227         event_lock->unlock();
 228         return result;
 229 }
 230
 231 int BC_Display::get_event_count()
 232 {
 233         event_lock->lock("BC_WindowBase::get_event_count 1");
 234         int result = common_events.size();
 235         event_lock->unlock();
 236         return result;
 237 }
 238
 239 XEvent* BC_Display::get_event()
 240 {
 241         XEvent *result = 0;
 242         while(!done && !result) {
 243                 event_condition->lock("BC_WindowBase::get_event");
 244                 event_lock->lock("BC_WindowBase::get_event");
 245
 246                 if(common_events.total && !done)
 247                 {
 248                         result = common_events.values[0];
 249                         common_events.remove_number(0);
 250                 }
 251
 252                 event_lock->unlock();
 253         }
 254         return result;
 255 }
 256
 257 void BC_Display::put_event(XEvent *event)
 258 {
 259         event_lock->lock("BC_WindowBase::put_event");
 260         common_events.append(event);
 261         event_lock->unlock();
 262         event_condition->unlock();
 263 }
 264
 265 void BC_Display::set_repeat(BC_WindowBase *window, int64_t duration)
 266 {
 267 return;
 268 // test repeater database for duplicates
 269         for(int i = 0; i < repeaters.total; i++)
 270         {
 271 // Matching delay already exists
 272                 if(repeaters.values[i]->delay == duration)
 273                 {
 274                         repeaters.values[i]->start_repeating(window);
 275                         return;
 276                 }
 277         }
 278
 279         BC_Repeater *repeater = new BC_Repeater(window, duration);
 280         repeater->initialize();
 281         repeaters.append(repeater);
 282     repeater->start_repeating();
 283 }
 284
 285 void BC_Display::unset_repeat(BC_WindowBase *window, int64_t duration)
 286 {
 287         for(int i = 0; i < repeaters.size(); i++)
 288         {
 289                 if(repeaters.get(i)->delay == duration)
 290                 {
 291                         repeaters.get(i)->stop_repeating(window);
 292                 }
 293         }
 294 }
 295
 296 void BC_Display::unset_all_repeaters(BC_WindowBase *window)
 297 {
 298         for(int i = 0; i < repeaters.total; i++)
 299         {
 300                 repeaters.values[i]->stop_all_repeating(window);
 301         }
 302 }
 303
 304 void BC_Display::arm_repeat(int64_t duration)
 305 {
 306         XEvent *event = BC_WindowBase::new_xevent();
 307         XClientMessageEvent *ptr = (XClientMessageEvent*)event;
 308         event->xany.window = 0;
 309         ptr->type = ClientMessage;
 310         ptr->message_type = RepeaterXAtom;
 311         ptr->format = 32;
 312         ptr->data.l[0] = duration;
 313
 314 // Couldn't use XSendEvent since it locked up randomly.
 315         put_event(event);
 316 }
 317
 318 void BC_Display::arm_completion(BC_WindowBase *window)
 319 {
 320         XEvent *event = BC_WindowBase::new_xevent();
 321         XClientMessageEvent *ptr = (XClientMessageEvent*)event;
 322         event->xany.window = window->win;
 323         event->type = ClientMessage;
 324         ptr->message_type = SetDoneXAtom;
 325         ptr->format = 32;
 326
 327         put_event(event);
 328 }
 329
 330 void BC_Display::unlock_repeaters(int64_t duration)
 331 {
 332         for(int i = 0; i < repeaters.size(); i++)
 333         {
 334                 if(repeaters.get(i)->delay == duration)
 335                 {
 336                         repeaters.get(i)->repeat_lock->unlock();
 337                 }
 338         }
 339 }
 340
 341
 342 void BC_Display::lock_display(const char *location)
 343 {
 344         pthread_mutex_lock(&BC_Display::display_lock);
 345         ++BC_Display::display_global->window_locked;
 346         pthread_mutex_unlock(&BC_Display::display_lock);
 347
 348 //printf("BC_Display::lock_display %d %s result=%d\n", __LINE__, location, result);
 349         XLockDisplay(BC_Display::display_global->display);
 350 }
 351
 352 void BC_Display::unlock_display()
 353 {
 354         pthread_mutex_lock(&BC_Display::display_lock);
 355         --BC_Display::display_global->window_locked;
 356 //      if(BC_Display::display_global->window_locked < 0)
 357 //              BC_Display::display_global->window_locked = 0;
 358         pthread_mutex_unlock(&BC_Display::display_lock);
 359
 360 //printf("BC_Display::unlock_display %d result=%d\n", __LINE__, result);
 361         XUnlockDisplay(BC_Display::display_global->display);
 362 }
 363
 364
 365 int BC_Display::get_display_locked()
 366 {
 367         return BC_Display::display_global->window_locked;
 368 }
 369
 370
 371 #endif