Dogcows Code - chaz/openbox/blob - openbox/grab.c

   1 #include "openbox.h"
   2 #include "event.h"
   3 #include "xerror.h"
   4
   5 #include <glib.h>
   6 #include <X11/Xlib.h>
   7
   8 #define GRAB_PTR_MASK (ButtonPressMask | ButtonReleaseMask | PointerMotionMask)
   9 #define GRAB_KEY_MASK (KeyPressMask | KeyReleaseMask)
  10
  11 #define MASK_LIST_SIZE 8
  12
  13 /*! A list of all possible combinations of keyboard lock masks */
  14 static unsigned int mask_list[MASK_LIST_SIZE];
  15
  16 gboolean grab_keyboard(gboolean grab)
  17 {
  18     static guint kgrabs = 0;
  19     gboolean ret = FALSE;
  20
  21     if (grab) {
  22         if (kgrabs++ == 0)
  23             ret = XGrabKeyboard(ob_display, ob_root, FALSE, GrabModeAsync,
  24                                 GrabModeAsync, event_lasttime) == Success;
  25         else
  26             ret = TRUE;
  27     } else if (kgrabs > 0) {
  28         if (--kgrabs == 0)
  29             XUngrabKeyboard(ob_display, event_lasttime);
  30     }
  31     return ret;
  32 }
  33
  34 gboolean grab_pointer(gboolean grab, Cursor cur)
  35 {
  36     static guint pgrabs = 0;
  37     gboolean ret = FALSE;
  38
  39     if (grab) {
  40         if (pgrabs++ == 0)
  41             ret = XGrabPointer(ob_display, ob_root, False, GRAB_PTR_MASK,
  42                                GrabModeAsync, GrabModeAsync, FALSE, cur,
  43                                event_lasttime) == Success;
  44         else
  45             ret = TRUE;
  46     } else if (pgrabs > 0) {
  47         if (--pgrabs == 0)
  48             XUngrabPointer(ob_display, event_lasttime);
  49     }
  50     return ret;
  51 }
  52
  53 gboolean grab_pointer_window(gboolean grab, Cursor cur, Window win)
  54 {
  55     static guint pgrabs = 0;
  56     gboolean ret = FALSE;
  57
  58     if (grab) {
  59         if (pgrabs++ == 0)
  60             ret = XGrabPointer(ob_display, win, False, GRAB_PTR_MASK,
  61                                GrabModeAsync, GrabModeAsync, TRUE, cur,
  62                                event_lasttime) == Success;
  63         else
  64             ret = TRUE;
  65     } else if (pgrabs > 0) {
  66         if (--pgrabs == 0)
  67             XUngrabPointer(ob_display, event_lasttime);
  68     }
  69     return ret;
  70 }
  71
  72 int grab_server(gboolean grab)
  73 {
  74     static guint sgrabs = 0;
  75     if (grab) {
  76         if (sgrabs++ == 0) {
  77             XGrabServer(ob_display);
  78             XSync(ob_display, FALSE);
  79         }
  80     } else if (sgrabs > 0) {
  81         if (--sgrabs == 0) {
  82             XUngrabServer(ob_display);
  83             XFlush(ob_display);
  84         }
  85     }
  86     return sgrabs;
  87 }
  88
  89 void grab_startup()
  90 {
  91     guint i = 0;
  92
  93     mask_list[i++] = 0;
  94     mask_list[i++] = LockMask;
  95     mask_list[i++] = NumLockMask;
  96     mask_list[i++] = LockMask | NumLockMask;
  97     mask_list[i++] = ScrollLockMask;
  98     mask_list[i++] = ScrollLockMask | LockMask;
  99     mask_list[i++] = ScrollLockMask | NumLockMask;
 100     mask_list[i++] = ScrollLockMask | LockMask | NumLockMask;
 101     g_assert(i == MASK_LIST_SIZE);
 102 }
 103
 104 void grab_shutdown()
 105 {
 106     while (grab_keyboard(FALSE));
 107     while (grab_pointer(FALSE, None));
 108     while (grab_pointer_window(FALSE, None, None));
 109     while (grab_server(FALSE));
 110 }
 111
 112 void grab_button_full(guint button, guint state, Window win, guint mask,
 113                       int pointer_mode, Cursor cursor)
 114 {
 115     guint i;
 116
 117     for (i = 0; i < MASK_LIST_SIZE; ++i)
 118         XGrabButton(ob_display, button, state | mask_list[i], win, FALSE, mask,
 119                     pointer_mode, GrabModeSync, None, cursor);
 120 }
 121
 122 void grab_button(guint button, guint state, Window win, guint mask)
 123 {
 124     grab_button_full(button, state, win, mask, GrabModeAsync, None);
 125 }
 126
 127 void ungrab_button(guint button, guint state, Window win)
 128 {
 129     guint i;
 130
 131     for (i = 0; i < MASK_LIST_SIZE; ++i)
 132         XUngrabButton(ob_display, button, state | mask_list[i], win);
 133 }
 134
 135 void grab_key(guint keycode, guint state, Window win, int keyboard_mode)
 136 {
 137     guint i;
 138
 139     xerror_set_ignore(TRUE); /* can get BadAccess' from these */
 140     xerror_occured = FALSE;
 141     for (i = 0; i < MASK_LIST_SIZE; ++i)
 142         XGrabKey(ob_display, keycode, state | mask_list[i], win, FALSE,
 143                  GrabModeSync, keyboard_mode);
 144     xerror_set_ignore(FALSE);
 145     if (xerror_occured)
 146         g_warning("failed to grab keycode %d modifiers %d", keycode, state);
 147 }
 148
 149 void ungrab_all_keys(Window win)
 150 {
 151     XUngrabKey(ob_display, AnyKey, AnyModifier, win);
 152 }