Pileus Git - ~andy/gtk/blob - gdk/broadway/gdkbroadway-server.c

   1 #include <sys/mman.h>
   2 #include <sys/stat.h>
   3 #include <fcntl.h>
   4
   5 #include "gdkbroadway-server.h"
   6
   7 #include "gdkprivate-broadway.h"
   8
   9 #include <glib.h>
  10 #include <glib/gprintf.h>
  11 #include <gio/gunixsocketaddress.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <errno.h>
  15 #include <unistd.h>
  16 #include <sys/types.h>
  17 #include <sys/socket.h>
  18 #include <netinet/in.h>
  19 #include <netinet/tcp.h>
  20
  21 typedef struct BroadwayInput BroadwayInput;
  22
  23 struct _GdkBroadwayServer {
  24   GObject parent_instance;
  25
  26   guint32 next_serial;
  27   GSocketConnection *connection;
  28
  29   guint32 recv_buffer_size;
  30   guint8 recv_buffer[1024];
  31
  32   guint process_input_idle;
  33   GList *incomming;
  34
  35 };
  36
  37 struct _GdkBroadwayServerClass
  38 {
  39   GObjectClass parent_class;
  40 };
  41
  42 static gboolean input_available_cb (gpointer stream, gpointer user_data);
  43
  44 G_DEFINE_TYPE (GdkBroadwayServer, gdk_broadway_server, G_TYPE_OBJECT)
  45
  46 static void
  47 gdk_broadway_server_init (GdkBroadwayServer *server)
  48 {
  49   server->next_serial = 1;
  50 }
  51
  52 static void
  53 gdk_broadway_server_finalize (GObject *object)
  54 {
  55   G_OBJECT_CLASS (gdk_broadway_server_parent_class)->finalize (object);
  56 }
  57
  58 static void
  59 gdk_broadway_server_class_init (GdkBroadwayServerClass * class)
  60 {
  61   GObjectClass *object_class = G_OBJECT_CLASS (class);
  62
  63   object_class->finalize = gdk_broadway_server_finalize;
  64 }
  65
  66 gboolean
  67 _gdk_broadway_server_lookahead_event (GdkBroadwayServer  *server,
  68                                       const char         *types)
  69 {
  70
  71   return FALSE;
  72 }
  73
  74 gulong
  75 _gdk_broadway_server_get_next_serial (GdkBroadwayServer *server)
  76 {
  77   return (gulong)server->next_serial;
  78 }
  79
  80 GdkBroadwayServer *
  81 _gdk_broadway_server_new (int port, GError **error)
  82 {
  83   GdkBroadwayServer *server;
  84   char *basename;
  85   GSocketClient *client;
  86   GSocketConnection *connection;
  87   GSocketAddress *address;
  88   GPollableInputStream *pollable;
  89   GInputStream *in;
  90   GSource *source;
  91   char *path;
  92
  93   basename = g_strdup_printf ("broadway%d.socket", port);
  94   path = g_build_filename (g_get_user_runtime_dir (), basename, NULL);
  95   g_free (basename);
  96
  97   address = g_unix_socket_address_new_with_type (path, -1,
  98                                                  G_UNIX_SOCKET_ADDRESS_ABSTRACT);
  99   g_free (path);
 100
 101   client = g_socket_client_new ();
 102
 103   error = NULL;
 104   connection = g_socket_client_connect (client, G_SOCKET_CONNECTABLE (address), NULL, error);
 105
 106   g_object_unref (address);
 107   g_object_unref (client);
 108
 109   if (connection == NULL)
 110     return NULL;
 111
 112   server = g_object_new (GDK_TYPE_BROADWAY_SERVER, NULL);
 113   server->connection = connection;
 114
 115   in = g_io_stream_get_input_stream (G_IO_STREAM (server->connection));
 116   pollable = G_POLLABLE_INPUT_STREAM (in);
 117
 118   source = g_pollable_input_stream_create_source (pollable, NULL);
 119   g_source_attach (source, NULL);
 120   g_source_set_callback (source, (GSourceFunc)input_available_cb, server, NULL);
 121
 122   return server;
 123 }
 124
 125 guint32
 126 _gdk_broadway_server_get_last_seen_time (GdkBroadwayServer *server)
 127 {
 128   return 0;
 129 }
 130
 131 static guint32
 132 gdk_broadway_server_send_message_with_size (GdkBroadwayServer *server, BroadwayRequestBase *base,
 133                                             gsize size, guint32 type)
 134 {
 135   GOutputStream *out;
 136   gsize written;
 137
 138   base->size = size;
 139   base->type = type;
 140   base->serial = server->next_serial++;
 141
 142   out = g_io_stream_get_output_stream (G_IO_STREAM (server->connection));
 143
 144   if (!g_output_stream_write_all (out, base, size, &written, NULL, NULL))
 145     {
 146       g_printerr ("Unable to write to server\n");
 147       exit (1);
 148     }
 149
 150   g_assert (written == size);
 151
 152   return base->serial;
 153 }
 154
 155 #define gdk_broadway_server_send_message(_server, _msg, _type) \
 156   gdk_broadway_server_send_message_with_size(_server, (BroadwayRequestBase *)&_msg, sizeof (_msg), _type)
 157
 158 static void
 159 parse_all_input (GdkBroadwayServer *server)
 160 {
 161   guint8 *p, *end;
 162   guint32 size;
 163   BroadwayReply *reply;
 164
 165   p = server->recv_buffer;
 166   end = p + server->recv_buffer_size;
 167
 168   while (p + sizeof (guint32) <= end)
 169     {
 170       memcpy (&size, p, sizeof (guint32));
 171       if (p + size > end)
 172         break;
 173
 174       reply = g_memdup (p, size);
 175       p += size;
 176
 177       server->incomming = g_list_append (server->incomming, reply);
 178     }
 179
 180   if (p < end)
 181     memmove (server->recv_buffer, p, end - p);
 182   server->recv_buffer_size = end - p;
 183 }
 184
 185 static void
 186 read_some_input_blocking (GdkBroadwayServer *server)
 187 {
 188   GInputStream *in;
 189   gssize res;
 190
 191   in = g_io_stream_get_input_stream (G_IO_STREAM (server->connection));
 192
 193   g_assert (server->recv_buffer_size < sizeof (server->recv_buffer));
 194   res = g_input_stream_read (in, &server->recv_buffer[server->recv_buffer_size],
 195                              sizeof (server->recv_buffer) - server->recv_buffer_size,
 196                              NULL, NULL);
 197
 198   if (res <= 0)
 199     {
 200       g_printerr ("Unable to read from broadway server\n");
 201       exit (1);
 202     }
 203
 204   server->recv_buffer_size += res;
 205 }
 206
 207 static void
 208 read_some_input_nonblocking (GdkBroadwayServer *server)
 209 {
 210   GInputStream *in;
 211   GPollableInputStream *pollable;
 212   gssize res;
 213   GError *error;
 214
 215   in = g_io_stream_get_input_stream (G_IO_STREAM (server->connection));
 216   pollable = G_POLLABLE_INPUT_STREAM (in);
 217
 218   g_assert (server->recv_buffer_size < sizeof (server->recv_buffer));
 219   error = NULL;
 220   res = g_pollable_input_stream_read_nonblocking (pollable, &server->recv_buffer[server->recv_buffer_size],
 221                                                   sizeof (server->recv_buffer) - server->recv_buffer_size,
 222                                                   NULL, &error);
 223
 224   if (res < 0 && g_error_matches (error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK))
 225     {
 226       g_error_free (error);
 227       res = 0;
 228     }
 229   else if (res <= 0)
 230     {
 231       g_printerr ("Unable to read from broadway server: %s\n", error ? error->message : "eof");
 232       exit (1);
 233     }
 234
 235   server->recv_buffer_size += res;
 236 }
 237
 238 static BroadwayReply *
 239 find_response_by_serial (GdkBroadwayServer *server, guint32 serial)
 240 {
 241   GList *l;
 242
 243   for (l = server->incomming; l != NULL; l = l->next)
 244     {
 245       BroadwayReply *reply = l->data;
 246
 247       if (reply->base.in_reply_to == serial)
 248         return reply;
 249     }
 250
 251   return NULL;
 252 }
 253
 254 static void
 255 process_input_messages (GdkBroadwayServer *server)
 256 {
 257   BroadwayReply *reply;
 258
 259   if (server->process_input_idle != 0)
 260     {
 261       g_source_remove (server->process_input_idle);
 262       server->process_input_idle = 0;
 263     }
 264
 265   while (server->incomming)
 266     {
 267       reply = server->incomming->data;
 268       server->incomming =
 269         g_list_delete_link (server->incomming,
 270                             server->incomming);
 271
 272       if (reply->base.type == BROADWAY_REPLY_EVENT)
 273         _gdk_broadway_events_got_input (&reply->event.msg);
 274       else
 275         g_warning ("Unhandled reply type %d\n", reply->base.type);
 276       g_free (reply);
 277     }
 278 }
 279
 280 static gboolean
 281 process_input_idle_cb (GdkBroadwayServer *server)
 282 {
 283   server->process_input_idle = 0;
 284   process_input_messages (server);
 285   return G_SOURCE_REMOVE;
 286 }
 287
 288 static void
 289 queue_process_input_at_idle (GdkBroadwayServer *server)
 290 {
 291   if (server->process_input_idle == 0)
 292     server->process_input_idle =
 293       g_idle_add_full (G_PRIORITY_DEFAULT, (GSourceFunc)process_input_idle_cb, server, NULL);
 294 }
 295
 296 static gboolean
 297 input_available_cb (gpointer stream, gpointer user_data)
 298 {
 299   GdkBroadwayServer *server = user_data;
 300
 301   read_some_input_nonblocking (server);
 302   parse_all_input (server);
 303
 304   process_input_messages (server);
 305
 306   return G_SOURCE_CONTINUE;
 307 }
 308
 309 static BroadwayReply *
 310 gdk_broadway_server_wait_for_reply (GdkBroadwayServer *server,
 311                                     guint32 serial)
 312 {
 313   BroadwayReply *reply;
 314
 315   while (TRUE)
 316     {
 317       reply = find_response_by_serial (server, serial);
 318       if (reply)
 319         {
 320           server->incomming = g_list_remove (server->incomming, reply);
 321           break;
 322         }
 323
 324       read_some_input_blocking (server);
 325       parse_all_input (server);
 326     }
 327
 328   queue_process_input_at_idle (server);
 329   return reply;
 330 }
 331
 332 void
 333 _gdk_broadway_server_flush (GdkBroadwayServer *server)
 334 {
 335   BroadwayRequestFlush msg;
 336
 337   gdk_broadway_server_send_message(server, msg, BROADWAY_REQUEST_FLUSH);
 338 }
 339
 340 void
 341 _gdk_broadway_server_sync (GdkBroadwayServer *server)
 342 {
 343   BroadwayRequestSync msg;
 344   guint32 serial;
 345   BroadwayReply *reply;
 346
 347   serial = gdk_broadway_server_send_message (server, msg,
 348                                              BROADWAY_REQUEST_SYNC);
 349   reply = gdk_broadway_server_wait_for_reply (server, serial);
 350
 351   g_assert (reply->base.type == BROADWAY_REPLY_SYNC);
 352
 353   g_free (reply);
 354
 355   return;
 356 }
 357
 358 void
 359 _gdk_broadway_server_query_mouse (GdkBroadwayServer *server,
 360                                   guint32            *toplevel,
 361                                   gint32             *root_x,
 362                                   gint32             *root_y,
 363                                   guint32            *mask)
 364 {
 365   BroadwayRequestQueryMouse msg;
 366   guint32 serial;
 367   BroadwayReply *reply;
 368
 369   serial = gdk_broadway_server_send_message (server, msg,
 370                                              BROADWAY_REQUEST_QUERY_MOUSE);
 371   reply = gdk_broadway_server_wait_for_reply (server, serial);
 372
 373   g_assert (reply->base.type == BROADWAY_REPLY_QUERY_MOUSE);
 374
 375   if (toplevel)
 376     *toplevel = reply->query_mouse.toplevel;
 377   if (root_x)
 378     *root_x = reply->query_mouse.root_x;
 379   if (root_y)
 380     *root_y = reply->query_mouse.root_y;
 381   if (mask)
 382     *mask = reply->query_mouse.mask;
 383
 384   g_free (reply);
 385 }
 386
 387 guint32
 388 _gdk_broadway_server_new_window (GdkBroadwayServer *server,
 389                                  int x,
 390                                  int y,
 391                                  int width,
 392                                  int height,
 393                                  gboolean is_temp)
 394 {
 395   BroadwayRequestNewWindow msg;
 396   guint32 serial, id;
 397   BroadwayReply *reply;
 398
 399   msg.x = x;
 400   msg.y = y;
 401   msg.width = width;
 402   msg.height = height;
 403   msg.is_temp = is_temp;
 404
 405   serial = gdk_broadway_server_send_message (server, msg,
 406                                              BROADWAY_REQUEST_NEW_WINDOW);
 407   reply = gdk_broadway_server_wait_for_reply (server, serial);
 408
 409   g_assert (reply->base.type == BROADWAY_REPLY_NEW_WINDOW);
 410
 411   id = reply->new_window.id;
 412
 413   g_free (reply);
 414
 415   return id;
 416 }
 417
 418 void
 419 _gdk_broadway_server_destroy_window (GdkBroadwayServer *server,
 420                                      gint id)
 421 {
 422   BroadwayRequestDestroyWindow msg;
 423
 424   msg.id = id;
 425   gdk_broadway_server_send_message (server, msg,
 426                                     BROADWAY_REQUEST_DESTROY_WINDOW);
 427 }
 428
 429 gboolean
 430 _gdk_broadway_server_window_show (GdkBroadwayServer *server,
 431                                   gint id)
 432 {
 433   BroadwayRequestShowWindow msg;
 434
 435   msg.id = id;
 436   gdk_broadway_server_send_message (server, msg,
 437                                     BROADWAY_REQUEST_SHOW_WINDOW);
 438
 439   return TRUE;
 440 }
 441
 442 gboolean
 443 _gdk_broadway_server_window_hide (GdkBroadwayServer *server,
 444                                   gint id)
 445 {
 446   BroadwayRequestHideWindow msg;
 447
 448   msg.id = id;
 449   gdk_broadway_server_send_message (server, msg,
 450                                     BROADWAY_REQUEST_HIDE_WINDOW);
 451
 452   return TRUE;
 453 }
 454
 455 void
 456 _gdk_broadway_server_window_set_transient_for (GdkBroadwayServer *server,
 457                                                gint id, gint parent)
 458 {
 459   BroadwayRequestSetTransientFor msg;
 460
 461   msg.id = id;
 462   msg.parent = parent;
 463   gdk_broadway_server_send_message (server, msg,
 464                                     BROADWAY_REQUEST_SET_TRANSIENT_FOR);
 465 }
 466
 467 gboolean
 468 _gdk_broadway_server_window_translate (GdkBroadwayServer *server,
 469                                        gint id,
 470                                        cairo_region_t *area,
 471                                        gint            dx,
 472                                        gint            dy)
 473 {
 474   BroadwayRequestTranslate *msg;
 475   cairo_rectangle_int_t rect;
 476   int i, n_rects;
 477   gsize msg_size;
 478
 479   n_rects = cairo_region_num_rectangles (area);
 480
 481   msg_size = sizeof (BroadwayRequestTranslate) + (n_rects-1) * sizeof (BroadwayRect);
 482   msg = g_malloc (msg_size);
 483
 484   msg->id = id;
 485   msg->dx = dx;
 486   msg->dy = dy;
 487   msg->n_rects = n_rects;
 488
 489   for (i = 0; i < n_rects; i++)
 490     {
 491       cairo_region_get_rectangle (area, i, &rect);
 492       msg->rects[i].x = rect.x;
 493       msg->rects[i].y = rect.y;
 494       msg->rects[i].width = rect.width;
 495       msg->rects[i].height = rect.height;
 496     }
 497
 498   gdk_broadway_server_send_message_with_size (server, (BroadwayRequestBase *)msg, msg_size,
 499                                               BROADWAY_REQUEST_TRANSLATE);
 500   g_free (msg);
 501   return TRUE;
 502 }
 503
 504 static char
 505 make_valid_fs_char (char c)
 506 {
 507   if (c == 0 || c == '/')
 508     return c + 1;
 509   return c;
 510 }
 511
 512 /* name must have at least space for 34 bytes */
 513 static int
 514 create_random_shm (char *name)
 515 {
 516   guint32 r;
 517   int i, o, fd;
 518
 519   while (TRUE)
 520     {
 521       o = 0;
 522       name[o++] = '/';
 523       for (i = 0; i < 32/4; i++)
 524         {
 525           r = g_random_int ();
 526           name[o++] = make_valid_fs_char ((r >> 0) & 0xff);
 527           name[o++] = make_valid_fs_char ((r >> 8) & 0xff);
 528           name[o++] = make_valid_fs_char ((r >> 16) & 0xff);
 529           name[o++] = make_valid_fs_char ((r >> 24) & 0xff);
 530         }
 531       name[o++] = 0;
 532
 533       fd = shm_open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 534       if (fd >= 0)
 535         return fd;
 536
 537       if (errno != EEXIST)
 538         {
 539           g_printerr ("Unable to allocate shared mem for window");
 540           exit (1);
 541         }
 542     }
 543
 544 }
 545
 546 static const cairo_user_data_key_t gdk_broadway_shm_cairo_key;
 547
 548 typedef struct {
 549   char name[34];
 550   void *data;
 551   gsize data_size;
 552 } BroadwayShmSurfaceData;
 553
 554 static void
 555 shm_data_destroy (void *_data)
 556 {
 557   BroadwayShmSurfaceData *data = _data;
 558
 559   munmap (data->data, data->data_size);
 560   shm_unlink (data->name);
 561   g_free (data);
 562 }
 563
 564 cairo_surface_t *
 565 _gdk_broadway_server_create_surface (int                 width,
 566                                      int                 height)
 567 {
 568   BroadwayShmSurfaceData *data;
 569   cairo_surface_t *surface;
 570   int res;
 571   int fd;
 572
 573   data = g_new (BroadwayShmSurfaceData, 1);
 574   data->data_size = width * height * sizeof (guint32);
 575
 576   fd = create_random_shm (data->name);
 577
 578   res = ftruncate (fd, data->data_size);
 579   g_assert (res != -1);
 580
 581   data->data = mmap(0, data->data_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
 582   (void) close(fd);
 583
 584   surface = cairo_image_surface_create_for_data ((guchar *)data->data,
 585                                                  CAIRO_FORMAT_RGB24, width, height, width * sizeof (guint32));
 586   g_assert (surface != NULL);
 587
 588   cairo_surface_set_user_data (surface, &gdk_broadway_shm_cairo_key,
 589                                data, shm_data_destroy);
 590
 591   return surface;
 592 }
 593
 594 void
 595 _gdk_broadway_server_window_update (GdkBroadwayServer *server,
 596                                     gint id,
 597                                     cairo_surface_t *surface)
 598 {
 599   BroadwayRequestUpdate msg;
 600   BroadwayShmSurfaceData *data;
 601
 602   if (surface == NULL)
 603     return;
 604
 605   data = cairo_surface_get_user_data (surface, &gdk_broadway_shm_cairo_key);
 606   g_assert (data != NULL);
 607
 608   msg.id = id;
 609   memcpy (msg.name, data->name, 34);
 610   msg.width = cairo_image_surface_get_width (surface);
 611   msg.height = cairo_image_surface_get_height (surface);
 612
 613   gdk_broadway_server_send_message (server, msg,
 614                                     BROADWAY_REQUEST_UPDATE);
 615 }
 616
 617 gboolean
 618 _gdk_broadway_server_window_move_resize (GdkBroadwayServer *server,
 619                                          gint id,
 620                                          int x,
 621                                          int y,
 622                                          int width,
 623                                          int height)
 624 {
 625   BroadwayRequestMoveResize msg;
 626
 627   msg.id = id;
 628   msg.x = x;
 629   msg.y = y;
 630   msg.width = width;
 631   msg.height = height;
 632
 633   gdk_broadway_server_send_message (server, msg,
 634                                     BROADWAY_REQUEST_MOVE_RESIZE);
 635
 636   return TRUE;
 637 }
 638
 639 GdkGrabStatus
 640 _gdk_broadway_server_grab_pointer (GdkBroadwayServer *server,
 641                                    gint id,
 642                                    gboolean owner_events,
 643                                    guint32 event_mask,
 644                                    guint32 time_)
 645 {
 646   BroadwayRequestGrabPointer msg;
 647   guint32 serial, status;
 648   BroadwayReply *reply;
 649
 650   msg.id = id;
 651   msg.owner_events = owner_events;
 652   msg.event_mask = event_mask;
 653   msg.time_ = time_;
 654
 655   serial = gdk_broadway_server_send_message (server, msg,
 656                                              BROADWAY_REQUEST_GRAB_POINTER);
 657   reply = gdk_broadway_server_wait_for_reply (server, serial);
 658
 659   g_assert (reply->base.type == BROADWAY_REPLY_GRAB_POINTER);
 660
 661   status = reply->grab_pointer.status;
 662
 663   g_free (reply);
 664
 665   return status;
 666 }
 667
 668 guint32
 669 _gdk_broadway_server_ungrab_pointer (GdkBroadwayServer *server,
 670                                      guint32    time_)
 671 {
 672   BroadwayRequestUngrabPointer msg;
 673   guint32 serial, status;
 674   BroadwayReply *reply;
 675
 676   msg.time_ = time_;
 677
 678   serial = gdk_broadway_server_send_message (server, msg,
 679                                              BROADWAY_REQUEST_UNGRAB_POINTER);
 680   reply = gdk_broadway_server_wait_for_reply (server, serial);
 681
 682   g_assert (reply->base.type == BROADWAY_REPLY_UNGRAB_POINTER);
 683
 684   status = reply->ungrab_pointer.status;
 685
 686   g_free (reply);
 687
 688   return status;
 689 }