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 "gdkx.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   GdkCursorPrivate *cursor_private;
 204   Cursor xcursor;
 205
 206   cursor_private = (GdkCursorPrivate*) cursor;
 207
 208   if (!cursor)
 209     xcursor = None;
 210   else
 211     xcursor = cursor_private->xcursor;
 212
 213   XDefineCursor (GDK_WINDOW_XDISPLAY (window),
 214                  GDK_WINDOW_XID (window),
 215                  xcursor);
 216 }
 217
 218 static void
 219 gdk_device_core_warp (GdkDevice *device,
 220                       GdkScreen *screen,
 221                       gint       x,
 222                       gint       y)
 223 {
 224   Display *xdisplay;
 225   Window dest;
 226
 227   xdisplay = GDK_DISPLAY_XDISPLAY (gdk_device_get_display (device));
 228   dest = GDK_WINDOW_XID (gdk_screen_get_root_window (screen));
 229
 230   XWarpPointer (xdisplay, None, dest, 0, 0, 0, 0, x, y);
 231 }
 232
 233 static gboolean
 234 gdk_device_core_query_state (GdkDevice        *device,
 235                              GdkWindow        *window,
 236                              GdkWindow       **root_window,
 237                              GdkWindow       **child_window,
 238                              gint             *root_x,
 239                              gint             *root_y,
 240                              gint             *win_x,
 241                              gint             *win_y,
 242                              GdkModifierType  *mask)
 243 {
 244   GdkDisplay *display;
 245   Window xroot_window, xchild_window;
 246   int xroot_x, xroot_y, xwin_x, xwin_y;
 247   unsigned int xmask;
 248
 249   display = gdk_window_get_display (window);
 250
 251   if (!XQueryPointer (GDK_WINDOW_XDISPLAY (window),
 252                       GDK_WINDOW_XID (window),
 253                       &xroot_window,
 254                       &xchild_window,
 255                       &xroot_x,
 256                       &xroot_y,
 257                       &xwin_x,
 258                       &xwin_y,
 259                       &xmask))
 260     {
 261       return FALSE;
 262     }
 263
 264   if (root_window)
 265     *root_window = gdk_window_lookup_for_display (display, xroot_window);
 266
 267   if (child_window)
 268     *child_window = gdk_window_lookup_for_display (display, xchild_window);
 269
 270   if (root_x)
 271     *root_x = xroot_x;
 272
 273   if (root_y)
 274     *root_y = xroot_y;
 275
 276   if (win_x)
 277     *win_x = xwin_x;
 278
 279   if (win_y)
 280     *win_y = xwin_y;
 281
 282   if (mask)
 283     *mask = xmask;
 284
 285   return TRUE;
 286 }
 287
 288 static GdkGrabStatus
 289 gdk_device_core_grab (GdkDevice    *device,
 290                       GdkWindow    *window,
 291                       gboolean      owner_events,
 292                       GdkEventMask  event_mask,
 293                       GdkWindow    *confine_to,
 294                       GdkCursor    *cursor,
 295                       guint32       time_)
 296 {
 297   GdkDisplay *display;
 298   Window xwindow, xconfine_to;
 299   int status;
 300
 301   display = gdk_device_get_display (device);
 302
 303   xwindow = GDK_WINDOW_XID (window);
 304
 305   if (confine_to)
 306     confine_to = _gdk_window_get_impl_window (confine_to);
 307
 308   if (!confine_to || GDK_WINDOW_DESTROYED (confine_to))
 309     xconfine_to = None;
 310   else
 311     xconfine_to = GDK_WINDOW_XID (confine_to);
 312
 313   if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
 314     {
 315       /* Device is a keyboard */
 316       status = XGrabKeyboard (GDK_DISPLAY_XDISPLAY (display),
 317                               xwindow,
 318                               owner_events,
 319                               GrabModeAsync, GrabModeAsync,
 320                               time_);
 321     }
 322   else
 323     {
 324       Cursor xcursor;
 325       guint xevent_mask;
 326       gint i;
 327
 328       /* Device is a pointer */
 329       if (!cursor)
 330         xcursor = None;
 331       else
 332         {
 333           _gdk_x11_cursor_update_theme (cursor);
 334           xcursor = ((GdkCursorPrivate *) cursor)->xcursor;
 335         }
 336
 337       xevent_mask = 0;
 338
 339       for (i = 0; i < _gdk_nenvent_masks; i++)
 340         {
 341           if (event_mask & (1 << (i + 1)))
 342             xevent_mask |= _gdk_event_mask_table[i];
 343         }
 344
 345       /* We don't want to set a native motion hint mask, as we're emulating motion
 346        * hints. If we set a native one we just wouldn't get any events.
 347        */
 348       xevent_mask &= ~PointerMotionHintMask;
 349
 350       status = XGrabPointer (GDK_DISPLAY_XDISPLAY (display),
 351                              xwindow,
 352                              owner_events,
 353                              xevent_mask,
 354                              GrabModeAsync, GrabModeAsync,
 355                              xconfine_to,
 356                              xcursor,
 357                              time_);
 358     }
 359
 360   return _gdk_x11_convert_grab_status (status);
 361 }
 362
 363 static void
 364 gdk_device_core_ungrab (GdkDevice *device,
 365                         guint32    time_)
 366 {
 367   GdkDisplay *display;
 368
 369   display = gdk_device_get_display (device);
 370
 371   if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
 372     XUngrabKeyboard (GDK_DISPLAY_XDISPLAY (display), time_);
 373   else
 374     XUngrabPointer (GDK_DISPLAY_XDISPLAY (display), time_);
 375 }
 376
 377 static GdkWindow *
 378 gdk_device_core_window_at_position (GdkDevice       *device,
 379                                     gint            *win_x,
 380                                     gint            *win_y,
 381                                     GdkModifierType *mask,
 382                                     gboolean         get_toplevel)
 383 {
 384   GdkDisplay *display;
 385   GdkScreen *screen;
 386   Display *xdisplay;
 387   GdkWindow *window;
 388   Window xwindow, root, child, last;
 389   int xroot_x, xroot_y, xwin_x, xwin_y;
 390   unsigned int xmask;
 391
 392   last = None;
 393   display = gdk_device_get_display (device);
 394   screen = gdk_display_get_default_screen (display);
 395
 396   /* This function really only works if the mouse pointer is held still
 397    * during its operation. If it moves from one leaf window to another
 398    * than we'll end up with inaccurate values for win_x, win_y
 399    * and the result.
 400    */
 401   gdk_x11_display_grab (display);
 402
 403   xdisplay = GDK_SCREEN_XDISPLAY (screen);
 404   xwindow = GDK_SCREEN_XROOTWIN (screen);
 405
 406   XQueryPointer (xdisplay, xwindow,
 407                  &root, &child,
 408                  &xroot_x, &xroot_y,
 409                  &xwin_x, &xwin_y,
 410                  &xmask);
 411
 412   if (root == xwindow)
 413     xwindow = child;
 414   else
 415     xwindow = root;
 416
 417   while (xwindow)
 418     {
 419       last = xwindow;
 420       XQueryPointer (xdisplay, xwindow,
 421                      &root, &xwindow,
 422                      &xroot_x, &xroot_y,
 423                      &xwin_x, &xwin_y,
 424                      &xmask);
 425
 426       if (get_toplevel && last != root &&
 427           (window = gdk_window_lookup_for_display (display, last)) != NULL &&
 428           window->window_type != GDK_WINDOW_FOREIGN)
 429         {
 430           xwindow = last;
 431           break;
 432         }
 433     }
 434
 435   gdk_x11_display_ungrab (display);
 436
 437   window = gdk_window_lookup_for_display (display, last);
 438
 439   if (win_x)
 440     *win_x = (window) ? xwin_x : -1;
 441
 442   if (win_y)
 443     *win_y = (window) ? xwin_y : -1;
 444
 445   if (mask)
 446     *mask = xmask;
 447
 448   return window;
 449 }
 450
 451 static void
 452 gdk_device_core_select_window_events (GdkDevice    *device,
 453                                       GdkWindow    *window,
 454                                       GdkEventMask  event_mask)
 455 {
 456   GdkEventMask filter_mask, window_mask;
 457   guint xmask = 0;
 458   gint i;
 459
 460   window_mask = gdk_window_get_events (window);
 461   filter_mask = (GDK_POINTER_MOTION_MASK &
 462                  GDK_POINTER_MOTION_HINT_MASK &
 463                  GDK_BUTTON_MOTION_MASK &
 464                  GDK_BUTTON1_MOTION_MASK &
 465                  GDK_BUTTON2_MOTION_MASK &
 466                  GDK_BUTTON3_MOTION_MASK &
 467                  GDK_BUTTON_PRESS_MASK &
 468                  GDK_BUTTON_RELEASE_MASK &
 469                  GDK_KEY_PRESS_MASK &
 470                  GDK_KEY_RELEASE_MASK &
 471                  GDK_ENTER_NOTIFY_MASK &
 472                  GDK_LEAVE_NOTIFY_MASK &
 473                  GDK_FOCUS_CHANGE_MASK &
 474                  GDK_PROXIMITY_IN_MASK &
 475                  GDK_PROXIMITY_OUT_MASK &
 476                  GDK_SCROLL_MASK);
 477
 478   /* Filter out non-device events */
 479   event_mask &= filter_mask;
 480
 481   /* Unset device events on window mask */
 482   window_mask &= ~(filter_mask);
 483
 484   /* Combine masks */
 485   event_mask |= window_mask;
 486
 487   for (i = 0; i < _gdk_nenvent_masks; i++)
 488     {
 489       if (event_mask & (1 << (i + 1)))
 490         xmask |= _gdk_event_mask_table[i];
 491     }
 492
 493   if (GDK_WINDOW_XID (window) != GDK_WINDOW_XROOTWIN (window))
 494     xmask |= StructureNotifyMask | PropertyChangeMask;
 495
 496   XSelectInput (GDK_WINDOW_XDISPLAY (window),
 497                 GDK_WINDOW_XID (window),
 498                 xmask);
 499 }