Pileus Git - ~andy/gtk/blob - gdk/x11/gdkdevice-core.c

   1 /* GDK - The GIMP Drawing Kit
   2  * Copyright (C) 2009 Carlos Garnacho <carlosg@gnome.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library 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 GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include "config.h"
  21
  22 #include "gdkdevice-core.h"
  23
  24 #include "gdkinternals.h"
  25 #include "gdkwindow.h"
  26 #include "gdkprivate-x11.h"
  27 #include "gdkasync.h"
  28
  29 static gboolean gdk_device_core_get_history (GdkDevice      *device,
  30                                              GdkWindow      *window,
  31                                              guint32         start,
  32                                              guint32         stop,
  33                                              GdkTimeCoord ***events,
  34                                              gint           *n_events);
  35 static void gdk_device_core_get_state (GdkDevice       *device,
  36                                        GdkWindow       *window,
  37                                        gdouble         *axes,
  38                                        GdkModifierType *mask);
  39 static void gdk_device_core_set_window_cursor (GdkDevice *device,
  40                                                GdkWindow *window,
  41                                                GdkCursor *cursor);
  42 static void gdk_device_core_warp (GdkDevice *device,
  43                                   GdkScreen *screen,
  44                                   gint       x,
  45                                   gint       y);
  46 static gboolean gdk_device_core_query_state (GdkDevice        *device,
  47                                              GdkWindow        *window,
  48                                              GdkWindow       **root_window,
  49                                              GdkWindow       **child_window,
  50                                              gint             *root_x,
  51                                              gint             *root_y,
  52                                              gint             *win_x,
  53                                              gint             *win_y,
  54                                              GdkModifierType  *mask);
  55 static GdkGrabStatus gdk_device_core_grab   (GdkDevice     *device,
  56                                              GdkWindow     *window,
  57                                              gboolean       owner_events,
  58                                              GdkEventMask   event_mask,
  59                                              GdkWindow     *confine_to,
  60                                              GdkCursor     *cursor,
  61                                              guint32        time_);
  62 static void          gdk_device_core_ungrab (GdkDevice     *device,
  63                                              guint32        time_);
  64 static GdkWindow * gdk_device_core_window_at_position (GdkDevice       *device,
  65                                                        gint            *win_x,
  66                                                        gint            *win_y,
  67                                                        GdkModifierType *mask,
  68                                                        gboolean         get_toplevel);
  69 static void      gdk_device_core_select_window_events (GdkDevice       *device,
  70                                                        GdkWindow       *window,
  71                                                        GdkEventMask     event_mask);
  72
  73
  74 G_DEFINE_TYPE (GdkDeviceCore, gdk_device_core, GDK_TYPE_DEVICE)
  75
  76 static void
  77 gdk_device_core_class_init (GdkDeviceCoreClass *klass)
  78 {
  79   GdkDeviceClass *device_class = GDK_DEVICE_CLASS (klass);
  80
  81   device_class->get_history = gdk_device_core_get_history;
  82   device_class->get_state = gdk_device_core_get_state;
  83   device_class->set_window_cursor = gdk_device_core_set_window_cursor;
  84   device_class->warp = gdk_device_core_warp;
  85   device_class->query_state = gdk_device_core_query_state;
  86   device_class->grab = gdk_device_core_grab;
  87   device_class->ungrab = gdk_device_core_ungrab;
  88   device_class->window_at_position = gdk_device_core_window_at_position;
  89   device_class->select_window_events = gdk_device_core_select_window_events;
  90 }
  91
  92 static void
  93 gdk_device_core_init (GdkDeviceCore *device_core)
  94 {
  95   GdkDevice *device;
  96
  97   device = GDK_DEVICE (device_core);
  98
  99   _gdk_device_add_axis (device, GDK_NONE, GDK_AXIS_X, 0, 0, 1);
 100   _gdk_device_add_axis (device, GDK_NONE, GDK_AXIS_Y, 0, 0, 1);
 101 }
 102
 103 static gboolean
 104 impl_coord_in_window (GdkWindow *window,
 105                       int        impl_x,
 106                       int        impl_y)
 107 {
 108   if (impl_x < window->abs_x ||
 109       impl_x >= window->abs_x + window->width)
 110     return FALSE;
 111
 112   if (impl_y < window->abs_y ||
 113       impl_y >= window->abs_y + window->height)
 114     return FALSE;
 115
 116   return TRUE;
 117 }
 118
 119 static gboolean
 120 gdk_device_core_get_history (GdkDevice      *device,
 121                              GdkWindow      *window,
 122                              guint32         start,
 123                              guint32         stop,
 124                              GdkTimeCoord ***events,
 125                              gint           *n_events)
 126 {
 127   XTimeCoord *xcoords;
 128   GdkTimeCoord **coords;
 129   GdkWindow *impl_window;
 130   int tmp_n_events;
 131   int i, j;
 132
 133   impl_window = _gdk_window_get_impl_window (window);
 134   xcoords = XGetMotionEvents (GDK_WINDOW_XDISPLAY (window),
 135                               GDK_WINDOW_XID (impl_window),
 136                               start, stop, &tmp_n_events);
 137   if (!xcoords)
 138     return FALSE;
 139
 140   coords = _gdk_device_allocate_history (device, tmp_n_events);
 141
 142   for (i = 0, j = 0; i < tmp_n_events; i++)
 143     {
 144       if (impl_coord_in_window (window, xcoords[i].x, xcoords[i].y))
 145         {
 146           coords[j]->time = xcoords[i].time;
 147           coords[j]->axes[0] = xcoords[i].x - window->abs_x;
 148           coords[j]->axes[1] = xcoords[i].y - window->abs_y;
 149           j++;
 150         }
 151     }
 152
 153   XFree (xcoords);
 154
 155   /* free the events we allocated too much */
 156   for (i = j; i < tmp_n_events; i++)
 157     {
 158       g_free (coords[i]);
 159       coords[i] = NULL;
 160     }
 161
 162   tmp_n_events = j;
 163
 164   if (tmp_n_events == 0)
 165     {
 166       gdk_device_free_history (coords, tmp_n_events);
 167       return FALSE;
 168     }
 169
 170   if (n_events)
 171     *n_events = tmp_n_events;
 172
 173   if (events)
 174     *events = coords;
 175   else if (coords)
 176     gdk_device_free_history (coords, tmp_n_events);
 177
 178   return TRUE;
 179 }
 180
 181 static void
 182 gdk_device_core_get_state (GdkDevice       *device,
 183                            GdkWindow       *window,
 184                            gdouble         *axes,
 185                            GdkModifierType *mask)
 186 {
 187   gint x_int, y_int;
 188
 189   gdk_window_get_pointer (window, &x_int, &y_int, mask);
 190
 191   if (axes)
 192     {
 193       axes[0] = x_int;
 194       axes[1] = y_int;
 195     }
 196 }
 197
 198 static void
 199 gdk_device_core_set_window_cursor (GdkDevice *device,
 200                                    GdkWindow *window,
 201                                    GdkCursor *cursor)
 202 {
 203   Cursor xcursor;
 204
 205   if (!cursor)
 206     xcursor = None;
 207   else
 208     xcursor = gdk_x11_cursor_get_xcursor (cursor);
 209
 210   XDefineCursor (GDK_WINDOW_XDISPLAY (window),
 211                  GDK_WINDOW_XID (window),
 212                  xcursor);
 213 }
 214
 215 static void
 216 gdk_device_core_warp (GdkDevice *device,
 217                       GdkScreen *screen,
 218                       gint       x,
 219                       gint       y)
 220 {
 221   Display *xdisplay;
 222   Window dest;
 223
 224   xdisplay = GDK_DISPLAY_XDISPLAY (gdk_device_get_display (device));
 225   dest = GDK_WINDOW_XID (gdk_screen_get_root_window (screen));
 226
 227   XWarpPointer (xdisplay, None, dest, 0, 0, 0, 0, x, y);
 228 }
 229
 230 static gboolean
 231 gdk_device_core_query_state (GdkDevice        *device,
 232                              GdkWindow        *window,
 233                              GdkWindow       **root_window,
 234                              GdkWindow       **child_window,
 235                              gint             *root_x,
 236                              gint             *root_y,
 237                              gint             *win_x,
 238                              gint             *win_y,
 239                              GdkModifierType  *mask)
 240 {
 241   GdkDisplay *display;
 242   GdkScreen *default_screen;
 243   Window xroot_window, xchild_window;
 244   int xroot_x, xroot_y, xwin_x, xwin_y;
 245   unsigned int xmask;
 246
 247   display = gdk_window_get_display (window);
 248   default_screen = gdk_display_get_default_screen (display);
 249
 250   if (G_LIKELY (GDK_DISPLAY_X11 (display)->trusted_client))
 251     {
 252       if (!XQueryPointer (GDK_WINDOW_XDISPLAY (window),
 253                           GDK_WINDOW_XID (window),
 254                           &xroot_window,
 255                           &xchild_window,
 256                           &xroot_x,
 257                           &xroot_y,
 258                           &xwin_x,
 259                           &xwin_y,
 260                           &xmask))
 261         return FALSE;
 262     }
 263   else
 264     {
 265       XSetWindowAttributes attributes;
 266       Display *xdisplay;
 267       Window xwindow, w;
 268
 269       /* FIXME: untrusted clients not multidevice-safe */
 270       xdisplay = GDK_SCREEN_XDISPLAY (default_screen);
 271       xwindow = GDK_SCREEN_XROOTWIN (default_screen);
 272
 273       w = XCreateWindow (xdisplay, xwindow, 0, 0, 1, 1, 0,
 274                          CopyFromParent, InputOnly, CopyFromParent,
 275                          0, &attributes);
 276       XQueryPointer (xdisplay, w,
 277                      &xroot_window,
 278                      &xchild_window,
 279                      &xroot_x,
 280                      &xroot_y,
 281                      &xwin_x,
 282                      &xwin_y,
 283                      &xmask);
 284       XDestroyWindow (xdisplay, w);
 285     }
 286
 287   if (root_window)
 288     *root_window = gdk_x11_window_lookup_for_display (display, xroot_window);
 289
 290   if (child_window)
 291     *child_window = gdk_x11_window_lookup_for_display (display, xchild_window);
 292
 293   if (root_x)
 294     *root_x = xroot_x;
 295
 296   if (root_y)
 297     *root_y = xroot_y;
 298
 299   if (win_x)
 300     *win_x = xwin_x;
 301
 302   if (win_y)
 303     *win_y = xwin_y;
 304
 305   if (mask)
 306     *mask = xmask;
 307
 308   return TRUE;
 309 }
 310
 311 static GdkGrabStatus
 312 gdk_device_core_grab (GdkDevice    *device,
 313                       GdkWindow    *window,
 314                       gboolean      owner_events,
 315                       GdkEventMask  event_mask,
 316                       GdkWindow    *confine_to,
 317                       GdkCursor    *cursor,
 318                       guint32       time_)
 319 {
 320   GdkDisplay *display;
 321   Window xwindow, xconfine_to;
 322   gint status;
 323
 324   display = gdk_device_get_display (device);
 325
 326   xwindow = GDK_WINDOW_XID (window);
 327
 328   if (confine_to)
 329     confine_to = _gdk_window_get_impl_window (confine_to);
 330
 331   if (!confine_to || GDK_WINDOW_DESTROYED (confine_to))
 332     xconfine_to = None;
 333   else
 334     xconfine_to = GDK_WINDOW_XID (confine_to);
 335
 336 #ifdef G_ENABLE_DEBUG
 337   if (_gdk_debug_flags & GDK_DEBUG_NOGRABS)
 338     status = GrabSuccess;
 339   else
 340 #endif
 341   if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
 342     {
 343       /* Device is a keyboard */
 344       status = XGrabKeyboard (GDK_DISPLAY_XDISPLAY (display),
 345                               xwindow,
 346                               owner_events,
 347                               GrabModeAsync, GrabModeAsync,
 348                               time_);
 349     }
 350   else
 351     {
 352       Cursor xcursor;
 353       guint xevent_mask;
 354       gint i;
 355
 356       /* Device is a pointer */
 357       if (!cursor)
 358         xcursor = None;
 359       else
 360         {
 361           _gdk_x11_cursor_update_theme (cursor);
 362           xcursor = gdk_x11_cursor_get_xcursor (cursor);
 363         }
 364
 365       xevent_mask = 0;
 366
 367       for (i = 0; i < _gdk_x11_event_mask_table_size; i++)
 368         {
 369           if (event_mask & (1 << (i + 1)))
 370             xevent_mask |= _gdk_x11_event_mask_table[i];
 371         }
 372
 373       /* We don't want to set a native motion hint mask, as we're emulating motion
 374        * hints. If we set a native one we just wouldn't get any events.
 375        */
 376       xevent_mask &= ~PointerMotionHintMask;
 377
 378       status = XGrabPointer (GDK_DISPLAY_XDISPLAY (display),
 379                              xwindow,
 380                              owner_events,
 381                              xevent_mask,
 382                              GrabModeAsync, GrabModeAsync,
 383                              xconfine_to,
 384                              xcursor,
 385                              time_);
 386     }
 387
 388   _gdk_x11_display_update_grab_info (display, device, status);
 389
 390   return _gdk_x11_convert_grab_status (status);
 391 }
 392
 393 static void
 394 gdk_device_core_ungrab (GdkDevice *device,
 395                         guint32    time_)
 396 {
 397   GdkDisplay *display;
 398   gulong serial;
 399
 400   display = gdk_device_get_display (device);
 401   serial = NextRequest (GDK_DISPLAY_XDISPLAY (display));
 402
 403   if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
 404     XUngrabKeyboard (GDK_DISPLAY_XDISPLAY (display), time_);
 405   else
 406     XUngrabPointer (GDK_DISPLAY_XDISPLAY (display), time_);
 407
 408   _gdk_x11_display_update_grab_info_ungrab (display, device, time_, serial);
 409 }
 410
 411 static GdkWindow *
 412 gdk_device_core_window_at_position (GdkDevice       *device,
 413                                     gint            *win_x,
 414                                     gint            *win_y,
 415                                     GdkModifierType *mask,
 416                                     gboolean         get_toplevel)
 417 {
 418   GdkDisplay *display;
 419   GdkScreen *screen;
 420   Display *xdisplay;
 421   GdkWindow *window;
 422   Window xwindow, root, child, last;
 423   int xroot_x, xroot_y, xwin_x, xwin_y;
 424   unsigned int xmask;
 425
 426   last = None;
 427   display = gdk_device_get_display (device);
 428   screen = gdk_display_get_default_screen (display);
 429
 430   /* This function really only works if the mouse pointer is held still
 431    * during its operation. If it moves from one leaf window to another
 432    * than we'll end up with inaccurate values for win_x, win_y
 433    * and the result.
 434    */
 435   gdk_x11_display_grab (display);
 436
 437   xdisplay = GDK_SCREEN_XDISPLAY (screen);
 438   xwindow = GDK_SCREEN_XROOTWIN (screen);
 439
 440   if (G_LIKELY (GDK_DISPLAY_X11 (display)->trusted_client))
 441     {
 442       XQueryPointer (xdisplay, xwindow,
 443                      &root, &child,
 444                      &xroot_x, &xroot_y,
 445                      &xwin_x, &xwin_y,
 446                      &xmask);
 447
 448       if (root == xwindow)
 449         xwindow = child;
 450       else
 451        xwindow = root;
 452     }
 453   else
 454     {
 455       gint i, screens, width, height;
 456       GList *toplevels, *list;
 457       Window pointer_window, root, child;
 458       int rootx = -1, rooty = -1;
 459       int winx, winy;
 460       unsigned int xmask;
 461
 462       /* FIXME: untrusted clients case not multidevice-safe */
 463       pointer_window = None;
 464       screens = gdk_display_get_n_screens (display);
 465
 466       for (i = 0; i < screens; ++i)
 467         {
 468           screen = gdk_display_get_screen (display, i);
 469           toplevels = gdk_screen_get_toplevel_windows (screen);
 470           for (list = toplevels; list != NULL; list = g_list_next (list))
 471             {
 472               window = GDK_WINDOW (list->data);
 473               xwindow = GDK_WINDOW_XID (window);
 474               gdk_x11_display_error_trap_push (display);
 475               XQueryPointer (xdisplay, xwindow,
 476                              &root, &child, &rootx, &rooty, &winx, &winy, &xmask);
 477               if (gdk_x11_display_error_trap_pop (display))
 478                 continue;
 479               if (child != None)
 480                 {
 481                   pointer_window = child;
 482                   break;
 483                 }
 484               gdk_window_get_geometry (window, NULL, NULL, &width, &height);
 485               if (winx >= 0 && winy >= 0 && winx < width && winy < height)
 486                 {
 487                   /* A childless toplevel, or below another window? */
 488                   XSetWindowAttributes attributes;
 489                   Window w;
 490
 491                   w = XCreateWindow (xdisplay, xwindow, winx, winy, 1, 1, 0,
 492                                      CopyFromParent, InputOnly, CopyFromParent,
 493                                      0, &attributes);
 494                   XMapWindow (xdisplay, w);
 495                   XQueryPointer (xdisplay, xwindow,
 496                                  &root, &child,
 497                                  &rootx, &rooty, &winx, &winy, &xmask);
 498                   XDestroyWindow (xdisplay, w);
 499                   if (child == w)
 500                     {
 501                       pointer_window = xwindow;
 502                       break;
 503                     }
 504                 }
 505             }
 506
 507           g_list_free (toplevels);
 508           if (pointer_window != None)
 509             break;
 510         }
 511
 512       xwindow = pointer_window;
 513     }
 514
 515   while (xwindow)
 516     {
 517       last = xwindow;
 518       gdk_x11_display_error_trap_push (display);
 519       XQueryPointer (xdisplay, xwindow,
 520                      &root, &xwindow,
 521                      &xroot_x, &xroot_y,
 522                      &xwin_x, &xwin_y,
 523                      &xmask);
 524       if (gdk_x11_display_error_trap_pop (display))
 525         break;
 526
 527       if (get_toplevel && last != root &&
 528           (window = gdk_x11_window_lookup_for_display (display, last)) != NULL &&
 529           window->window_type != GDK_WINDOW_FOREIGN)
 530         {
 531           xwindow = last;
 532           break;
 533         }
 534     }
 535
 536   gdk_x11_display_ungrab (display);
 537
 538   window = gdk_x11_window_lookup_for_display (display, last);
 539
 540   if (win_x)
 541     *win_x = (window) ? xwin_x : -1;
 542
 543   if (win_y)
 544     *win_y = (window) ? xwin_y : -1;
 545
 546   if (mask)
 547     *mask = xmask;
 548
 549   return window;
 550 }
 551
 552 static void
 553 gdk_device_core_select_window_events (GdkDevice    *device,
 554                                       GdkWindow    *window,
 555                                       GdkEventMask  event_mask)
 556 {
 557   GdkEventMask filter_mask, window_mask;
 558   guint xmask = 0;
 559   gint i;
 560
 561   window_mask = gdk_window_get_events (window);
 562   filter_mask = (GDK_POINTER_MOTION_MASK &
 563                  GDK_POINTER_MOTION_HINT_MASK &
 564                  GDK_BUTTON_MOTION_MASK &
 565                  GDK_BUTTON1_MOTION_MASK &
 566                  GDK_BUTTON2_MOTION_MASK &
 567                  GDK_BUTTON3_MOTION_MASK &
 568                  GDK_BUTTON_PRESS_MASK &
 569                  GDK_BUTTON_RELEASE_MASK &
 570                  GDK_KEY_PRESS_MASK &
 571                  GDK_KEY_RELEASE_MASK &
 572                  GDK_ENTER_NOTIFY_MASK &
 573                  GDK_LEAVE_NOTIFY_MASK &
 574                  GDK_FOCUS_CHANGE_MASK &
 575                  GDK_PROXIMITY_IN_MASK &
 576                  GDK_PROXIMITY_OUT_MASK &
 577                  GDK_SCROLL_MASK);
 578
 579   /* Filter out non-device events */
 580   event_mask &= filter_mask;
 581
 582   /* Unset device events on window mask */
 583   window_mask &= ~(filter_mask);
 584
 585   /* Combine masks */
 586   event_mask |= window_mask;
 587
 588   for (i = 0; i < _gdk_x11_event_mask_table_size; i++)
 589     {
 590       if (event_mask & (1 << (i + 1)))
 591         xmask |= _gdk_x11_event_mask_table[i];
 592     }
 593
 594   if (GDK_WINDOW_XID (window) != GDK_WINDOW_XROOTWIN (window))
 595     xmask |= StructureNotifyMask | PropertyChangeMask;
 596
 597   XSelectInput (GDK_WINDOW_XDISPLAY (window),
 598                 GDK_WINDOW_XID (window),
 599                 xmask);
 600 }