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