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Initialize globalconf.timestamp at startup 

There are lots of places where ICCCM says that using CurrentTime for a
timestamp is wrong. So, instead of having globalconf.timestamp
initialized to CurrentTime, initialize it with a proper timestamp.

Signed-off-by: Uli Schlachter <psychon@znc.in>
This commit is contained in:
Uli Schlachter 2017-04-15 11:46:10 +02:00
parent a87387d9f3
commit 5d83eee16f
1 changed files with 46 additions and 0 deletions
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46
awesome.c
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@ -294,6 +294,49 @@ acquire_WM_Sn(bool replace)
xcb_send_event(globalconf.connection, false, globalconf.screen->root, 0xFFFFFF, (char *) &ev);
}
static void
acquire_timestamp(void)
{
/* Getting a current timestamp is hard. ICCCM recommends a zero-length
* append to a property, so let's do that.
*/
xcb_generic_event_t *event;
xcb_window_t win = globalconf.screen->root;
xcb_atom_t atom = XCB_ATOM_RESOURCE_MANAGER; /* Just something random */
xcb_atom_t type = XCB_ATOM_STRING; /* Equally random */
xcb_grab_server(globalconf.connection);
xcb_change_window_attributes(globalconf.connection, win,
XCB_CW_EVENT_MASK, (uint32_t[]) { XCB_EVENT_MASK_PROPERTY_CHANGE });
xcb_change_property(globalconf.connection, XCB_PROP_MODE_APPEND, win,
atom, type, 8, 0, "");
xcb_change_window_attributes(globalconf.connection, win,
XCB_CW_EVENT_MASK, (uint32_t[]) { 0 });
xcb_ungrab_server(globalconf.connection);
xcb_flush(globalconf.connection);
/* Now wait for the event */
while((event = xcb_wait_for_event(globalconf.connection)))
{
/* Is it the event we are waiting for? */
if(XCB_EVENT_RESPONSE_TYPE(event) == XCB_PROPERTY_NOTIFY)
{
xcb_property_notify_event_t *ev = (void *) event;
globalconf.timestamp = ev->time;
p_delete(&event);
break;
}
/* Hm, not the right event. */
if (globalconf.pending_event != NULL)
{
event_handle(globalconf.pending_event);
p_delete(&globalconf.pending_event);
}
globalconf.pending_event = event;
}
}
static xcb_generic_event_t *poll_for_event(void)
{
if (globalconf.pending_event) {
@ -635,6 +678,9 @@ main(int argc, char **argv)
globalconf.visual->visual_id);
}
/* Get a recent timestamp */
acquire_timestamp();
/* Prefetch all the extensions we might need */
xcb_prefetch_extension_data(globalconf.connection, &xcb_big_requests_id);
xcb_prefetch_extension_data(globalconf.connection, &xcb_test_id);