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 <gdk/gdkwindow.h>
  23 #include "gdkdevice-core.h"
  24 #include "gdkprivate-x11.h"
  25 #include "gdkx.h"
  26
  27 static gboolean gdk_device_core_get_history (GdkDevice      *device,
  28                                              GdkWindow      *window,
  29                                              guint32         start,
  30                                              guint32         stop,
  31                                              GdkTimeCoord ***events,
  32                                              guint          *n_events);
  33 static void gdk_device_core_get_state (GdkDevice       *device,
  34                                        GdkWindow       *window,
  35                                        gdouble         *axes,
  36                                        GdkModifierType *mask);
  37 static void gdk_device_core_set_window_cursor (GdkDevice *device,
  38                                                GdkWindow *window,
  39                                                GdkCursor *cursor);
  40 static void gdk_device_core_warp (GdkDevice *device,
  41                                   GdkScreen *screen,
  42                                   gint       x,
  43                                   gint       y);
  44 static gboolean gdk_device_core_query_state (GdkDevice        *device,
  45                                              GdkWindow        *window,
  46                                              GdkWindow       **root_window,
  47                                              GdkWindow       **child_window,
  48                                              gint             *root_x,
  49                                              gint             *root_y,
  50                                              gint             *win_x,
  51                                              gint             *win_y,
  52                                              GdkModifierType  *mask);
  53 static GdkGrabStatus gdk_device_core_grab   (GdkDevice     *device,
  54                                              GdkWindow     *window,
  55                                              gboolean       owner_events,
  56                                              GdkEventMask   event_mask,
  57                                              GdkWindow     *confine_to,
  58                                              GdkCursor     *cursor,
  59                                              guint32        time_);
  60 static void          gdk_device_core_ungrab (GdkDevice     *device,
  61                                              guint32        time_);
  62 static GdkWindow * gdk_device_core_window_at_position (GdkDevice       *device,
  63                                                        gint            *win_x,
  64                                                        gint            *win_y,
  65                                                        GdkModifierType *mask,
  66                                                        gboolean         get_toplevel);
  67 static void      gdk_device_core_select_window_events (GdkDevice       *device,
  68                                                        GdkWindow       *window,
  69                                                        GdkEventMask     event_mask);
  70
  71
  72 G_DEFINE_TYPE (GdkDeviceCore, gdk_device_core, GDK_TYPE_DEVICE)
  73
  74 static void
  75 gdk_device_core_class_init (GdkDeviceCoreClass *klass)
  76 {
  77   GdkDeviceClass *device_class = GDK_DEVICE_CLASS (klass);
  78
  79   device_class->get_history = gdk_device_core_get_history;
  80   device_class->get_state = gdk_device_core_get_state;
  81   device_class->set_window_cursor = gdk_device_core_set_window_cursor;
  82   device_class->warp = gdk_device_core_warp;
  83   device_class->query_state = gdk_device_core_query_state;
  84   device_class->grab = gdk_device_core_grab;
  85   device_class->ungrab = gdk_device_core_ungrab;
  86   device_class->window_at_position = gdk_device_core_window_at_position;
  87   device_class->select_window_events = gdk_device_core_select_window_events;
  88 }
  89
  90 static void
  91 gdk_device_core_init (GdkDeviceCore *device_core)
  92 {
  93   GdkDevice *device;
  94
  95   device = GDK_DEVICE (device_core);
  96
  97   _gdk_device_add_axis (device, GDK_NONE, GDK_AXIS_X, 0, 0, 1);
  98   _gdk_device_add_axis (device, GDK_NONE, GDK_AXIS_Y, 0, 0, 1);
  99 }
 100
 101 static gboolean
 102 impl_coord_in_window (GdkWindow *window,
 103                       int        impl_x,
 104                       int        impl_y)
 105 {
 106   GdkWindowObject *priv = (GdkWindowObject *) window;
 107
 108   if (impl_x < priv->abs_x ||
 109       impl_x > priv->abs_x + priv->width)
 110     return FALSE;
 111
 112   if (impl_y < priv->abs_y ||
 113       impl_y > priv->abs_y + priv->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                              guint          *n_events)
 126 {
 127   GdkWindowObject *priv;
 128   XTimeCoord *xcoords;
 129   GdkTimeCoord **coords;
 130   GdkWindow *impl_window;
 131   int tmp_n_events;
 132   int i, j;
 133
 134   impl_window = _gdk_window_get_impl_window (window);
 135   xcoords = XGetMotionEvents (GDK_DRAWABLE_XDISPLAY (window),
 136                               GDK_DRAWABLE_XID (impl_window),
 137                               start, stop, &tmp_n_events);
 138   if (!xcoords)
 139     return FALSE;
 140
 141   priv = (GdkWindowObject *) window;
 142   coords = _gdk_device_allocate_history (device, tmp_n_events);
 143
 144   for (i = 0, j = 0; i < tmp_n_events; i++)
 145     {
 146       if (impl_coord_in_window (window, xcoords[i].x, xcoords[i].y))
 147         {
 148           coords[j]->time = xcoords[i].time;
 149           coords[j]->axes[0] = xcoords[i].x - priv->abs_x;
 150           coords[j]->axes[1] = xcoords[i].y - priv->abs_y;
 151           j++;
 152         }
 153     }
 154
 155   XFree (xcoords);
 156
 157   /* free the events we allocated too much */
 158   for (i = j; i < tmp_n_events; i++)
 159     {
 160       g_free (coords[i]);
 161       coords[i] = NULL;
 162     }
 163
 164   tmp_n_events = j;
 165
 166   if (tmp_n_events == 0)
 167     {
 168       gdk_device_free_history (coords, tmp_n_events);
 169       return FALSE;
 170     }
 171
 172   if (n_events)
 173     *n_events = tmp_n_events;
 174
 175   if (events)
 176     *events = coords;
 177   else if (coords)
 178     gdk_device_free_history (coords, tmp_n_events);
 179
 180   return TRUE;
 181 }
 182
 183 static void
 184 gdk_device_core_get_state (GdkDevice       *device,
 185                            GdkWindow       *window,
 186                            gdouble         *axes,
 187                            GdkModifierType *mask)
 188 {
 189   gint x_int, y_int;
 190
 191   gdk_window_get_pointer (window, &x_int, &y_int, mask);
 192
 193   if (axes)
 194     {
 195       axes[0] = x_int;
 196       axes[1] = y_int;
 197     }
 198 }
 199
 200 static void
 201 gdk_device_core_set_window_cursor (GdkDevice *device,
 202                                    GdkWindow *window,
 203                                    GdkCursor *cursor)
 204 {
 205   GdkCursorPrivate *cursor_private;
 206   Cursor xcursor;
 207
 208   cursor_private = (GdkCursorPrivate*) cursor;
 209
 210   if (!cursor)
 211     xcursor = None;
 212   else
 213     xcursor = cursor_private->xcursor;
 214
 215   XDefineCursor (GDK_WINDOW_XDISPLAY (window),
 216                  GDK_WINDOW_XID (window),
 217                  xcursor);
 218 }
 219
 220 static void
 221 gdk_device_core_warp (GdkDevice *device,
 222                       GdkScreen *screen,
 223                       gint       x,
 224                       gint       y)
 225 {
 226   Display *xdisplay;
 227   Window dest;
 228
 229   xdisplay = GDK_DISPLAY_XDISPLAY (gdk_device_get_display (device));
 230   dest = GDK_WINDOW_XWINDOW (gdk_screen_get_root_window (screen));
 231
 232   XWarpPointer (xdisplay, None, dest, 0, 0, 0, 0, x, y);
 233 }
 234
 235 static gboolean
 236 gdk_device_core_query_state (GdkDevice        *device,
 237                              GdkWindow        *window,
 238                              GdkWindow       **root_window,
 239                              GdkWindow       **child_window,
 240                              gint             *root_x,
 241                              gint             *root_y,
 242                              gint             *win_x,
 243                              gint             *win_y,
 244                              GdkModifierType  *mask)
 245 {
 246   GdkDisplay *display;
 247   Window xroot_window, xchild_window;
 248   int xroot_x, xroot_y, xwin_x, xwin_y;
 249   unsigned int xmask;
 250
 251   display = gdk_window_get_display (window);
 252
 253   if (!XQueryPointer (GDK_WINDOW_XDISPLAY (window),
 254                       GDK_WINDOW_XID (window),
 255                       &xroot_window,
 256                       &xchild_window,
 257                       &xroot_x,
 258                       &xroot_y,
 259                       &xwin_x,
 260                       &xwin_y,
 261                       &xmask))
 262     {
 263       return FALSE;
 264     }
 265
 266   if (root_window)
 267     *root_window = gdk_window_lookup_for_display (display, xroot_window);
 268
 269   if (child_window)
 270     *child_window = gdk_window_lookup_for_display (display, xchild_window);
 271
 272   if (root_x)
 273     *root_x = xroot_x;
 274
 275   if (root_y)
 276     *root_y = xroot_y;
 277
 278   if (win_x)
 279     *win_x = xwin_x;
 280
 281   if (win_y)
 282     *win_y = xwin_y;
 283
 284   if (mask)
 285     *mask = xmask;
 286
 287   return TRUE;
 288 }
 289
 290 static GdkGrabStatus
 291 gdk_device_core_grab (GdkDevice    *device,
 292                       GdkWindow    *window,
 293                       gboolean      owner_events,
 294                       GdkEventMask  event_mask,
 295                       GdkWindow    *confine_to,
 296                       GdkCursor    *cursor,
 297                       guint32       time_)
 298 {
 299   GdkDisplay *display;
 300   Window xwindow, xconfine_to;
 301   int status;
 302
 303   display = gdk_device_get_display (device);
 304
 305   xwindow = GDK_WINDOW_XID (window);
 306
 307   if (confine_to)
 308     confine_to = _gdk_window_get_impl_window (confine_to);
 309
 310   if (!confine_to || GDK_WINDOW_DESTROYED (confine_to))
 311     xconfine_to = None;
 312   else
 313     xconfine_to = GDK_WINDOW_XID (confine_to);
 314
 315   if (device->source == GDK_SOURCE_KEYBOARD)
 316     {
 317       /* Device is a keyboard */
 318       status = XGrabKeyboard (GDK_DISPLAY_XDISPLAY (display),
 319                               xwindow,
 320                               owner_events,
 321                               GrabModeAsync, GrabModeAsync,
 322                               time_);
 323     }
 324   else
 325     {
 326       Cursor xcursor;
 327       guint xevent_mask;
 328       gint i;
 329
 330       /* Device is a pointer */
 331       if (!cursor)
 332         xcursor = None;
 333       else
 334         {
 335           _gdk_x11_cursor_update_theme (cursor);
 336           xcursor = ((GdkCursorPrivate *) cursor)->xcursor;
 337         }
 338
 339       xevent_mask = 0;
 340
 341       for (i = 0; i < _gdk_nenvent_masks; i++)
 342         {
 343           if (event_mask & (1 << (i + 1)))
 344             xevent_mask |= _gdk_event_mask_table[i];
 345         }
 346
 347       /* We don't want to set a native motion hint mask, as we're emulating motion
 348        * hints. If we set a native one we just wouldn't get any events.
 349        */
 350       xevent_mask &= ~PointerMotionHintMask;
 351
 352       status = XGrabPointer (GDK_DISPLAY_XDISPLAY (display),
 353                              xwindow,
 354                              owner_events,
 355                              xevent_mask,
 356                              GrabModeAsync, GrabModeAsync,
 357                              xconfine_to,
 358                              xcursor,
 359                              time_);
 360     }
 361
 362   return _gdk_x11_convert_grab_status (status);
 363 }
 364
 365 static void
 366 gdk_device_core_ungrab (GdkDevice *device,
 367                         guint32    time_)
 368 {
 369   GdkDisplay *display;
 370
 371   display = gdk_device_get_display (device);
 372
 373   if (device->source == GDK_SOURCE_KEYBOARD)
 374     XUngrabKeyboard (GDK_DISPLAY_XDISPLAY (display), time_);
 375   else
 376     XUngrabPointer (GDK_DISPLAY_XDISPLAY (display), time_);
 377 }
 378
 379 static GdkWindow *
 380 gdk_device_core_window_at_position (GdkDevice       *device,
 381                                     gint            *win_x,
 382                                     gint            *win_y,
 383                                     GdkModifierType *mask,
 384                                     gboolean         get_toplevel)
 385 {
 386   GdkDisplay *display;
 387   GdkScreen *screen;
 388   Display *xdisplay;
 389   GdkWindow *window;
 390   Window xwindow, root, child, last;
 391   int xroot_x, xroot_y, xwin_x, xwin_y;
 392   unsigned int xmask;
 393
 394   last = None;
 395   display = gdk_device_get_display (device);
 396   screen = gdk_display_get_default_screen (display);
 397
 398   /* This function really only works if the mouse pointer is held still
 399    * during its operation. If it moves from one leaf window to another
 400    * than we'll end up with inaccurate values for win_x, win_y
 401    * and the result.
 402    */
 403   gdk_x11_display_grab (display);
 404
 405   xdisplay = GDK_SCREEN_XDISPLAY (screen);
 406   xwindow = GDK_SCREEN_XROOTWIN (screen);
 407
 408   XQueryPointer (xdisplay, xwindow,
 409                  &root, &child,
 410                  &xroot_x, &xroot_y,
 411                  &xwin_x, &xwin_y,
 412                  &xmask);
 413
 414   if (root == xwindow)
 415     xwindow = child;
 416   else
 417     xwindow = root;
 418
 419   while (xwindow)
 420     {
 421       last = xwindow;
 422       XQueryPointer (xdisplay, xwindow,
 423                      &root, &xwindow,
 424                      &xroot_x, &xroot_y,
 425                      &xwin_x, &xwin_y,
 426                      &xmask);
 427
 428       if (get_toplevel && last != root &&
 429           (window = gdk_window_lookup_for_display (display, last)) != NULL &&
 430           GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN)
 431         {
 432           xwindow = last;
 433           break;
 434         }
 435     }
 436
 437   gdk_x11_display_ungrab (display);
 438
 439   window = gdk_window_lookup_for_display (display, last);
 440
 441   if (win_x)
 442     *win_x = (window) ? xwin_x : -1;
 443
 444   if (win_y)
 445     *win_y = (window) ? xwin_y : -1;
 446
 447   if (mask)
 448     *mask = xmask;
 449
 450   return window;
 451 }
 452
 453 static void
 454 gdk_device_core_select_window_events (GdkDevice    *device,
 455                                       GdkWindow    *window,
 456                                       GdkEventMask  event_mask)
 457 {
 458   GdkEventMask filter_mask, window_mask;
 459   guint xmask = 0;
 460   gint i;
 461
 462   window_mask = gdk_window_get_events (window);
 463   filter_mask = (GDK_POINTER_MOTION_MASK &
 464                  GDK_POINTER_MOTION_HINT_MASK &
 465                  GDK_BUTTON_MOTION_MASK &
 466                  GDK_BUTTON1_MOTION_MASK &
 467                  GDK_BUTTON2_MOTION_MASK &
 468                  GDK_BUTTON3_MOTION_MASK &
 469                  GDK_BUTTON_PRESS_MASK &
 470                  GDK_BUTTON_RELEASE_MASK &
 471                  GDK_KEY_PRESS_MASK &
 472                  GDK_KEY_RELEASE_MASK &
 473                  GDK_ENTER_NOTIFY_MASK &
 474                  GDK_LEAVE_NOTIFY_MASK &
 475                  GDK_FOCUS_CHANGE_MASK &
 476                  GDK_PROXIMITY_IN_MASK &
 477                  GDK_PROXIMITY_OUT_MASK &
 478                  GDK_SCROLL_MASK);
 479
 480   /* Filter out non-device events */
 481   event_mask &= filter_mask;
 482
 483   /* Unset device events on window mask */
 484   window_mask &= ~(filter_mask);
 485
 486   /* Combine masks */
 487   event_mask |= window_mask;
 488
 489   for (i = 0; i < _gdk_nenvent_masks; i++)
 490     {
 491       if (event_mask & (1 << (i + 1)))
 492         xmask |= _gdk_event_mask_table[i];
 493     }
 494
 495   if (GDK_WINDOW_XID (window) != GDK_WINDOW_XROOTWIN (window))
 496     xmask |= StructureNotifyMask | PropertyChangeMask;
 497
 498   XSelectInput (GDK_WINDOW_XDISPLAY (window),
 499                 GDK_WINDOW_XWINDOW (window),
 500                 xmask);
 501 }