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keybindings: Add API to freeze/unfreeze the keyboard

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We'll use this in gnome-shell to freeze the keyboard right before
switching input source and unfreeze it after that's finished so that
we don't lose any key events to the wrong input source.

https://bugzilla.gnome.org/show_bug.cgi?id=697001
This commit is contained in:
Rui Matos 2013-03-29 02:38:43 +01:00
parent f97d8dfb6c
commit bda4af5504
2 changed files with 51 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
src/core/keybindings.c
View File

@ -1248,7 +1248,8 @@ grab_status_to_string (int status)
static gboolean
grab_keyboard (MetaDisplay *display,
Window xwindow,
guint32 timestamp)
guint32 timestamp,
int grab_mode)
{
int result;
int grab_status;
@ -1269,7 +1270,7 @@ grab_keyboard (MetaDisplay *display,
xwindow,
timestamp,
None,
XIGrabModeAsync, XIGrabModeAsync,
grab_mode, grab_mode,
True, /* owner_events */
&mask);
@ -1323,7 +1324,7 @@ meta_screen_grab_all_keys (MetaScreen *screen, guint32 timestamp)
meta_topic (META_DEBUG_KEYBINDINGS,
"Grabbing all keys on RootWindow\n");
retval = grab_keyboard (screen->display, screen->xroot, timestamp);
retval = grab_keyboard (screen->display, screen->xroot, timestamp, XIGrabModeAsync);
if (retval)
{
screen->all_keys_grabbed = TRUE;
@ -1376,7 +1377,7 @@ meta_window_grab_all_keys (MetaWindow *window,
meta_topic (META_DEBUG_KEYBINDINGS,
"Grabbing all keys on window %s\n", window->desc);
retval = grab_keyboard (window->display, grabwindow, timestamp);
retval = grab_keyboard (window->display, grabwindow, timestamp, XIGrabModeAsync);
if (retval)
{
window->keys_grabbed = FALSE;
@ -1403,6 +1404,44 @@ meta_window_ungrab_all_keys (MetaWindow *window, guint32 timestamp)
}
}
void
meta_display_grab_keyboard (MetaDisplay *display, guint32 timestamp)
{
grab_keyboard (display, DefaultRootWindow (display->xdisplay), timestamp, XIGrabModeSync);
}
void
meta_display_ungrab_keyboard (MetaDisplay *display, guint32 timestamp)
{
ungrab_keyboard (display, timestamp);
}
void
meta_display_freeze_keyboard (MetaDisplay *display, guint32 timestamp)
{
meta_error_trap_push (display);
meta_topic (META_DEBUG_KEYBINDINGS,
"Freezing keyboard with timestamp %u\n",
timestamp);
XIAllowEvents (display->xdisplay, META_VIRTUAL_CORE_KEYBOARD_ID,
XISyncDevice, timestamp);
meta_error_trap_pop (display);
}
void
meta_display_unfreeze_keyboard (MetaDisplay *display, guint32 timestamp)
{
meta_error_trap_push (display);
meta_topic (META_DEBUG_KEYBINDINGS,
"Unfreezing keyboard with timestamp %u\n",
timestamp);
XIAllowEvents (display->xdisplay, META_VIRTUAL_CORE_KEYBOARD_ID,
XIAsyncDevice, timestamp);
meta_error_trap_pop (display);
}
static gboolean
is_modifier (MetaDisplay *display,
unsigned int keycode)

8
src/meta/display.h
View File

@ -187,4 +187,12 @@ void meta_display_unmanage_screen (MetaDisplay *display,
void meta_display_clear_mouse_mode (MetaDisplay *display);
void meta_display_grab_keyboard (MetaDisplay *display,
guint32 timestamp);
void meta_display_ungrab_keyboard (MetaDisplay *display,
guint32 timestamp);
void meta_display_freeze_keyboard (MetaDisplay *display,
guint32 timestamp);
void meta_display_unfreeze_keyboard (MetaDisplay *display,
guint32 timestamp);
#endif