Pileus Git - ~andy/gtk/blob - gdk/x11/gdkdevice-xi2.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-xi2.h"
  23
  24 #include "gdkintl.h"
  25 #include "gdkx.h"
  26
  27 #include <X11/extensions/XInput2.h>
  28
  29 struct _GdkDeviceXI2Private
  30 {
  31   int device_id;
  32 };
  33
  34 static void gdk_device_xi2_get_property (GObject      *object,
  35                                          guint         prop_id,
  36                                          GValue       *value,
  37                                          GParamSpec   *pspec);
  38 static void gdk_device_xi2_set_property (GObject      *object,
  39                                          guint         prop_id,
  40                                          const GValue *value,
  41                                          GParamSpec   *pspec);
  42
  43 static void gdk_device_xi2_get_state (GdkDevice       *device,
  44                                       GdkWindow       *window,
  45                                       gdouble         *axes,
  46                                       GdkModifierType *mask);
  47 static void gdk_device_xi2_set_window_cursor (GdkDevice *device,
  48                                               GdkWindow *window,
  49                                               GdkCursor *cursor);
  50 static void gdk_device_xi2_warp (GdkDevice *device,
  51                                  GdkScreen *screen,
  52                                  gint       x,
  53                                  gint       y);
  54 static gboolean gdk_device_xi2_query_state (GdkDevice        *device,
  55                                             GdkWindow        *window,
  56                                             GdkWindow       **root_window,
  57                                             GdkWindow       **child_window,
  58                                             gint             *root_x,
  59                                             gint             *root_y,
  60                                             gint             *win_x,
  61                                             gint             *win_y,
  62                                             GdkModifierType  *mask);
  63
  64 static GdkGrabStatus gdk_device_xi2_grab   (GdkDevice     *device,
  65                                             GdkWindow     *window,
  66                                             gboolean       owner_events,
  67                                             GdkEventMask   event_mask,
  68                                             GdkWindow     *confine_to,
  69                                             GdkCursor     *cursor,
  70                                             guint32        time_);
  71 static void          gdk_device_xi2_ungrab (GdkDevice     *device,
  72                                             guint32        time_);
  73
  74 static GdkWindow * gdk_device_xi2_window_at_position (GdkDevice       *device,
  75                                                       gint            *win_x,
  76                                                       gint            *win_y,
  77                                                       GdkModifierType *mask,
  78                                                       gboolean         get_toplevel);
  79 static void  gdk_device_xi2_select_window_events (GdkDevice    *device,
  80                                                   GdkWindow    *window,
  81                                                   GdkEventMask  event_mask);
  82
  83
  84 G_DEFINE_TYPE (GdkDeviceXI2, gdk_device_xi2, GDK_TYPE_DEVICE)
  85
  86 enum {
  87   PROP_0,
  88   PROP_DEVICE_ID
  89 };
  90
  91 static void
  92 gdk_device_xi2_class_init (GdkDeviceXI2Class *klass)
  93 {
  94   GObjectClass *object_class = G_OBJECT_CLASS (klass);
  95   GdkDeviceClass *device_class = GDK_DEVICE_CLASS (klass);
  96
  97   object_class->get_property = gdk_device_xi2_get_property;
  98   object_class->set_property = gdk_device_xi2_set_property;
  99
 100   device_class->get_state = gdk_device_xi2_get_state;
 101   device_class->set_window_cursor = gdk_device_xi2_set_window_cursor;
 102   device_class->warp = gdk_device_xi2_warp;
 103   device_class->query_state = gdk_device_xi2_query_state;
 104   device_class->grab = gdk_device_xi2_grab;
 105   device_class->ungrab = gdk_device_xi2_ungrab;
 106   device_class->window_at_position = gdk_device_xi2_window_at_position;
 107   device_class->select_window_events = gdk_device_xi2_select_window_events;
 108
 109   g_object_class_install_property (object_class,
 110                                    PROP_DEVICE_ID,
 111                                    g_param_spec_int ("device-id",
 112                                                      P_("Device ID"),
 113                                                      P_("Device identifier"),
 114                                                      0, G_MAXINT, 0,
 115                                                      G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
 116
 117   g_type_class_add_private (object_class, sizeof (GdkDeviceXI2Private));
 118 }
 119
 120 static void
 121 gdk_device_xi2_init (GdkDeviceXI2 *device)
 122 {
 123   GdkDeviceXI2Private *priv;
 124
 125   device->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (device,
 126                                                      GDK_TYPE_DEVICE_XI2,
 127                                                      GdkDeviceXI2Private);
 128 }
 129
 130 static void
 131 gdk_device_xi2_get_property (GObject    *object,
 132                              guint       prop_id,
 133                              GValue     *value,
 134                              GParamSpec *pspec)
 135 {
 136   GdkDeviceXI2Private *priv;
 137
 138   priv = GDK_DEVICE_XI2 (object)->priv;
 139
 140   switch (prop_id)
 141     {
 142     case PROP_DEVICE_ID:
 143       g_value_set_int (value, priv->device_id);
 144       break;
 145     default:
 146       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 147       break;
 148     }
 149 }
 150
 151 static void
 152 gdk_device_xi2_set_property (GObject      *object,
 153                              guint         prop_id,
 154                              const GValue *value,
 155                              GParamSpec   *pspec)
 156 {
 157   GdkDeviceXI2Private *priv;
 158
 159   priv = GDK_DEVICE_XI2 (object)->priv;
 160
 161   switch (prop_id)
 162     {
 163     case PROP_DEVICE_ID:
 164       priv->device_id = g_value_get_int (value);
 165       break;
 166     default:
 167       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 168       break;
 169     }
 170 }
 171
 172 static void
 173 gdk_device_xi2_get_state (GdkDevice       *device,
 174                           GdkWindow       *window,
 175                           gdouble         *axes,
 176                           GdkModifierType *mask)
 177 {
 178   GdkDeviceXI2Private *priv;
 179   GdkDisplay *display;
 180   XIDeviceInfo *info;
 181   gint i, j, ndevices;
 182
 183   priv = GDK_DEVICE_XI2 (device)->priv;
 184   display = gdk_device_get_display (device);
 185
 186   if (axes)
 187     {
 188       info = XIQueryDevice(GDK_DISPLAY_XDISPLAY (display),
 189                            priv->device_id, &ndevices);
 190
 191       for (i = 0, j = 0; i < info->num_classes; i++)
 192         {
 193           XIAnyClassInfo *class_info = info->classes[i];
 194           GdkAxisUse use;
 195           gdouble value;
 196
 197           if (class_info->type != XIValuatorClass)
 198             continue;
 199
 200           value = ((XIValuatorClassInfo *) class_info)->value;
 201           use = _gdk_device_get_axis_use (device, j);
 202
 203           switch (use)
 204             {
 205             case GDK_AXIS_X:
 206             case GDK_AXIS_Y:
 207             case GDK_AXIS_IGNORE:
 208               if (device->mode == GDK_MODE_WINDOW)
 209                 _gdk_device_translate_window_coord (device, window, j, value, &axes[j]);
 210               else
 211                 {
 212                   gint root_x, root_y;
 213
 214                   /* FIXME: Maybe root coords chaching should happen here */
 215                   gdk_window_get_origin (window, &root_x, &root_y);
 216                   _gdk_device_translate_screen_coord (device, window,
 217                                                       root_x, root_y,
 218                                                       j, value,
 219                                                       &axes[j]);
 220                 }
 221               break;
 222             default:
 223               _gdk_device_translate_axis (device, j, value, &axes[j]);
 224               break;
 225             }
 226
 227           j++;
 228         }
 229
 230       XIFreeDeviceInfo (info);
 231     }
 232
 233   if (mask)
 234     gdk_device_xi2_query_state (device, window,
 235                                 NULL, NULL,
 236                                 NULL, NULL,
 237                                 NULL, NULL,
 238                                 mask);
 239 }
 240
 241 static void
 242 gdk_device_xi2_set_window_cursor (GdkDevice *device,
 243                                   GdkWindow *window,
 244                                   GdkCursor *cursor)
 245 {
 246   GdkDeviceXI2Private *priv;
 247   GdkCursorPrivate *cursor_private;
 248
 249   priv = GDK_DEVICE_XI2 (device)->priv;
 250
 251   /* Non-master devices don't have a cursor */
 252   if (gdk_device_get_device_type (device) != GDK_DEVICE_TYPE_MASTER)
 253     return;
 254
 255   if (cursor)
 256     {
 257       cursor_private = (GdkCursorPrivate*) cursor;
 258
 259       XIDefineCursor (GDK_WINDOW_XDISPLAY (window),
 260                       priv->device_id,
 261                       GDK_WINDOW_XWINDOW (window),
 262                       cursor_private->xcursor);
 263     }
 264   else
 265     XIUndefineCursor (GDK_WINDOW_XDISPLAY (window),
 266                       priv->device_id,
 267                       GDK_WINDOW_XWINDOW (window));
 268 }
 269
 270 static void
 271 gdk_device_xi2_warp (GdkDevice *device,
 272                      GdkScreen *screen,
 273                      gint       x,
 274                      gint       y)
 275 {
 276   GdkDeviceXI2Private *priv;
 277   Window dest;
 278
 279   priv = GDK_DEVICE_XI2 (device)->priv;
 280   dest = GDK_WINDOW_XWINDOW (gdk_screen_get_root_window (screen));
 281
 282   XIWarpPointer (GDK_SCREEN_XDISPLAY (screen),
 283                  priv->device_id,
 284                  None, dest,
 285                  0, 0, 0, 0, x, y);
 286 }
 287
 288 static gboolean
 289 gdk_device_xi2_query_state (GdkDevice        *device,
 290                             GdkWindow        *window,
 291                             GdkWindow       **root_window,
 292                             GdkWindow       **child_window,
 293                             gint             *root_x,
 294                             gint             *root_y,
 295                             gint             *win_x,
 296                             gint             *win_y,
 297                             GdkModifierType  *mask)
 298 {
 299   GdkDisplay *display;
 300   GdkDeviceXI2Private *priv;
 301   Window xroot_window, xchild_window;
 302   gdouble xroot_x, xroot_y, xwin_x, xwin_y;
 303   XIButtonState button_state;
 304   XIModifierState mod_state;
 305   XIGroupState group_state;
 306
 307   if (!window || GDK_WINDOW_DESTROYED (window))
 308     return FALSE;
 309
 310   priv = GDK_DEVICE_XI2 (device)->priv;
 311   display = gdk_window_get_display (window);
 312
 313   if (!XIQueryPointer (GDK_WINDOW_XDISPLAY (window),
 314                        priv->device_id,
 315                        GDK_WINDOW_XID (window),
 316                        &xroot_window,
 317                        &xchild_window,
 318                        &xroot_x,
 319                        &xroot_y,
 320                        &xwin_x,
 321                        &xwin_y,
 322                        &button_state,
 323                        &mod_state,
 324                        &group_state))
 325     {
 326       return FALSE;
 327     }
 328
 329   if (root_window)
 330     *root_window = gdk_window_lookup_for_display (display, xroot_window);
 331
 332   if (child_window)
 333     *child_window = gdk_window_lookup_for_display (display, xchild_window);
 334
 335   if (root_x)
 336     *root_x = (gint) xroot_x;
 337
 338   if (root_y)
 339     *root_y = (gint) xroot_y;
 340
 341   if (win_x)
 342     *win_x = (gint) xwin_x;
 343
 344   if (win_y)
 345     *win_y = (gint) xwin_y;
 346
 347   if (mask)
 348     *mask = gdk_device_xi2_translate_state (&mod_state, &button_state);
 349
 350   return TRUE;
 351 }
 352
 353 static GdkGrabStatus
 354 gdk_device_xi2_grab (GdkDevice    *device,
 355                      GdkWindow    *window,
 356                      gboolean      owner_events,
 357                      GdkEventMask  event_mask,
 358                      GdkWindow    *confine_to,
 359                      GdkCursor    *cursor,
 360                      guint32       time_)
 361 {
 362   GdkDeviceXI2Private *priv;
 363   GdkDisplay *display;
 364   XIEventMask mask;
 365   Window xwindow;
 366   Cursor xcursor;
 367   int status;
 368
 369   priv = GDK_DEVICE_XI2 (device)->priv;
 370   display = gdk_device_get_display (device);
 371
 372   /* FIXME: confine_to is actually unused */
 373
 374   xwindow = GDK_WINDOW_XID (window);
 375
 376   if (!cursor)
 377     xcursor = None;
 378   else
 379     {
 380       _gdk_x11_cursor_update_theme (cursor);
 381       xcursor = ((GdkCursorPrivate *) cursor)->xcursor;
 382     }
 383
 384   mask.deviceid = priv->device_id;
 385   mask.mask = gdk_device_xi2_translate_event_mask (event_mask, &mask.mask_len);
 386
 387   status = XIGrabDevice (GDK_DISPLAY_XDISPLAY (display),
 388                          priv->device_id,
 389                          xwindow,
 390                          time_,
 391                          xcursor,
 392                          GrabModeAsync, GrabModeAsync,
 393                          owner_events,
 394                          &mask);
 395
 396   g_free (mask.mask);
 397
 398   return _gdk_x11_convert_grab_status (status);
 399 }
 400
 401 static void
 402 gdk_device_xi2_ungrab (GdkDevice *device,
 403                        guint32    time_)
 404 {
 405   GdkDeviceXI2Private *priv;
 406   GdkDisplay *display;
 407
 408   priv = GDK_DEVICE_XI2 (device)->priv;
 409   display = gdk_device_get_display (device);
 410
 411   XIUngrabDevice (GDK_DISPLAY_XDISPLAY (display),
 412                   priv->device_id,
 413                   time_);
 414 }
 415
 416 static GdkWindow *
 417 gdk_device_xi2_window_at_position (GdkDevice       *device,
 418                                    gint            *win_x,
 419                                    gint            *win_y,
 420                                    GdkModifierType *mask,
 421                                    gboolean         get_toplevel)
 422 {
 423   GdkDeviceXI2Private *priv;
 424   GdkDisplay *display;
 425   GdkScreen *screen;
 426   Display *xdisplay;
 427   GdkWindow *window;
 428   Window xwindow, root, child, last = None;
 429   gdouble xroot_x, xroot_y, xwin_x, xwin_y;
 430   XIButtonState button_state;
 431   XIModifierState mod_state;
 432   XIGroupState group_state;
 433
 434   priv = GDK_DEVICE_XI2 (device)->priv;
 435   display = gdk_device_get_display (device);
 436   screen = gdk_display_get_default_screen (display);
 437
 438   /* This function really only works if the mouse pointer is held still
 439    * during its operation. If it moves from one leaf window to another
 440    * than we'll end up with inaccurate values for win_x, win_y
 441    * and the result.
 442    */
 443   gdk_x11_display_grab (display);
 444
 445   xdisplay = GDK_SCREEN_XDISPLAY (screen);
 446   xwindow = GDK_SCREEN_XROOTWIN (screen);
 447
 448   XIQueryPointer (xdisplay,
 449                   priv->device_id,
 450                   xwindow,
 451                   &root, &child,
 452                   &xroot_x, &xroot_y,
 453                   &xwin_x, &xwin_y,
 454                   &button_state,
 455                   &mod_state,
 456                   &group_state);
 457
 458   if (root == xwindow)
 459     xwindow = child;
 460   else
 461     xwindow = root;
 462
 463   while (xwindow)
 464     {
 465       last = xwindow;
 466       XIQueryPointer (xdisplay,
 467                       priv->device_id,
 468                       xwindow,
 469                       &root, &xwindow,
 470                       &xroot_x, &xroot_y,
 471                       &xwin_x, &xwin_y,
 472                       &button_state,
 473                       &mod_state,
 474                       &group_state);
 475
 476       if (get_toplevel && last != root &&
 477           (window = gdk_window_lookup_for_display (display, last)) != NULL &&
 478           GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN)
 479         {
 480           xwindow = last;
 481           break;
 482         }
 483     }
 484
 485   gdk_x11_display_ungrab (display);
 486
 487   window = gdk_window_lookup_for_display (display, last);
 488
 489   if (win_x)
 490     *win_x = (window) ? (gint) xwin_x : -1;
 491
 492   if (win_y)
 493     *win_y = (window) ? (gint) xwin_y : -1;
 494
 495   if (mask)
 496     *mask = gdk_device_xi2_translate_state (&mod_state, &button_state);
 497
 498   return window;
 499 }
 500
 501 static void
 502 gdk_device_xi2_select_window_events (GdkDevice    *device,
 503                                      GdkWindow    *window,
 504                                      GdkEventMask  event_mask)
 505 {
 506   GdkDeviceXI2Private *priv;
 507   XIEventMask evmask;
 508
 509   priv = GDK_DEVICE_XI2 (device)->priv;
 510
 511   evmask.deviceid = priv->device_id;
 512   evmask.mask = gdk_device_xi2_translate_event_mask (event_mask, &evmask.mask_len);
 513
 514   XISelectEvents (GDK_WINDOW_XDISPLAY (window),
 515                   GDK_WINDOW_XWINDOW (window),
 516                   &evmask, 1);
 517
 518   g_free (evmask.mask);
 519 }
 520
 521 guchar *
 522 gdk_device_xi2_translate_event_mask (GdkEventMask  event_mask,
 523                                      int          *len)
 524 {
 525   guchar *mask;
 526
 527   *len = XIMaskLen (XI_LASTEVENT);
 528   mask = g_new0 (guchar, *len);
 529
 530   if (event_mask & GDK_POINTER_MOTION_MASK ||
 531       event_mask & GDK_POINTER_MOTION_HINT_MASK)
 532     XISetMask (mask, XI_Motion);
 533
 534   if (event_mask & GDK_BUTTON_MOTION_MASK ||
 535       event_mask & GDK_BUTTON1_MOTION_MASK ||
 536       event_mask & GDK_BUTTON2_MOTION_MASK ||
 537       event_mask & GDK_BUTTON3_MOTION_MASK)
 538     {
 539       XISetMask (mask, XI_ButtonPress);
 540       XISetMask (mask, XI_ButtonRelease);
 541       XISetMask (mask, XI_Motion);
 542     }
 543
 544   if (event_mask & GDK_SCROLL_MASK)
 545     {
 546       XISetMask (mask, XI_ButtonPress);
 547       XISetMask (mask, XI_ButtonRelease);
 548     }
 549
 550   if (event_mask & GDK_BUTTON_PRESS_MASK)
 551     XISetMask (mask, XI_ButtonPress);
 552
 553   if (event_mask & GDK_BUTTON_RELEASE_MASK)
 554     XISetMask (mask, XI_ButtonRelease);
 555
 556   if (event_mask & GDK_KEY_PRESS_MASK)
 557     XISetMask (mask, XI_KeyPress);
 558
 559   if (event_mask & GDK_KEY_RELEASE_MASK)
 560     XISetMask (mask, XI_KeyRelease);
 561
 562   if (event_mask & GDK_ENTER_NOTIFY_MASK)
 563     XISetMask (mask, XI_Enter);
 564
 565   if (event_mask & GDK_LEAVE_NOTIFY_MASK)
 566     XISetMask (mask, XI_Leave);
 567
 568   if (event_mask & GDK_FOCUS_CHANGE_MASK)
 569     {
 570       XISetMask (mask, XI_FocusIn);
 571       XISetMask (mask, XI_FocusOut);
 572     }
 573
 574   return mask;
 575 }
 576
 577 guint
 578 gdk_device_xi2_translate_state (XIModifierState *mods_state,
 579                                 XIButtonState   *buttons_state)
 580 {
 581   guint state = 0;
 582
 583   if (mods_state)
 584     state = (guint) mods_state->effective;
 585
 586   if (buttons_state)
 587     {
 588       gint len, i;
 589
 590       /* We're only interested in the first 5 buttons */
 591       len = MIN (5, buttons_state->mask_len * 8);
 592
 593       for (i = 0; i < len; i++)
 594         {
 595           if (!XIMaskIsSet (buttons_state->mask, i))
 596             continue;
 597
 598           switch (i)
 599             {
 600             case 1:
 601               state |= GDK_BUTTON1_MASK;
 602               break;
 603             case 2:
 604               state |= GDK_BUTTON2_MASK;
 605               break;
 606             case 3:
 607               state |= GDK_BUTTON3_MASK;
 608               break;
 609             case 4:
 610               state |= GDK_BUTTON4_MASK;
 611               break;
 612             case 5:
 613               state |= GDK_BUTTON5_MASK;
 614               break;
 615             default:
 616               break;
 617             }
 618         }
 619     }
 620
 621   return state;
 622 }