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Wrap XSetInputFocus, making display->expected_focus_window a little more

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2004-12-22  Elijah Newren  <newren@gmail.com>

	Wrap XSetInputFocus, making display->expected_focus_window a
	little more reliable (see #154598)

	* src/display.h: (struct _MetaDisplay): add a large comment about
	the expected_focus_window, add a last_focus_time field,
	(XSERVER_TIME_IS_BEFORE): new macro moved from window.c but fixed
	for 64-bit systems, (meta_display_set_input_focus_window): new
	function

	* src/display.c (meta_display_open): initialize last_focus_time,
	add a comment about brokenness of trying to set intial focus
	window, (meta_display_set_input_focus_window): new function that
	wraps XSetInputFocus,
	(meta_display_focus_the_no_focus_window): make this function
	closer to a wrapping of XSetInputFocus for the no_focus_window.

	* src/window.c (XSERVER_TIME_IS_LATER): remove this macro in favor
	of the improved one added to display.h

	* src/display.c (meta_display_open):
	* src/window.c (meta_window_focus):
	use meta_display_focus_the_no_focus_window and
	meta_display_set_input_focus instead of XSetInputFocus
This commit is contained in:
Elijah Newren 2004-12-23 06:44:56 +00:00 committed by Elijah Newren
parent e46fc46701
commit 892cb8a8dd
4 changed files with 113 additions and 30 deletions
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26
ChangeLog
View File

@ -1,3 +1,29 @@
2004-12-22 Elijah Newren <newren@gmail.com>
Wrap XSetInputFocus, making display->expected_focus_window a
little more reliable (see #154598)
* src/display.h: (struct _MetaDisplay): add a large comment about
the expected_focus_window, add a last_focus_time field,
(XSERVER_TIME_IS_BEFORE): new macro moved from window.c but fixed
for 64-bit systems, (meta_display_set_input_focus_window): new
function
* src/display.c (meta_display_open): initialize last_focus_time,
add a comment about brokenness of trying to set intial focus
window, (meta_display_set_input_focus_window): new function that
wraps XSetInputFocus,
(meta_display_focus_the_no_focus_window): make this function
closer to a wrapping of XSetInputFocus for the no_focus_window.
* src/window.c (XSERVER_TIME_IS_LATER): remove this macro in favor
of the improved one added to display.h
* src/display.c (meta_display_open):
* src/window.c (meta_window_focus):
use meta_display_focus_the_no_focus_window and
meta_display_set_input_focus instead of XSetInputFocus
2004-12-22 Elijah Newren <newren@gmail.com>
* src/core.c (meta_core_user_lower_and_unfocus):

42
src/display.c
View File

@ -632,6 +632,7 @@ meta_display_open (const char *name)
timestamp = event.xproperty.time;
}
display->last_focus_time = timestamp;
display->compositor = meta_compositor_new (display);
screens = NULL;
@ -676,19 +677,27 @@ meta_display_open (const char *name)
/* kinda bogus because GetInputFocus has no possible errors */
meta_error_trap_push (display);
/* FIXME: This is totally broken; see comment 9 of bug 88194 about this */
focus = None;
ret_to = RevertToPointerRoot;
XGetInputFocus (display->xdisplay, &focus, &ret_to);
/* Force a new FocusIn (does this work?) */
if (focus == None || focus == PointerRoot)
focus = display->no_focus_window;
/* Use the same timestamp that was passed to meta_screen_new(),
* as it is the most recent timestamp.
*/
XSetInputFocus (display->xdisplay, focus, RevertToPointerRoot,
timestamp);
if (focus == None || focus == PointerRoot)
meta_display_focus_the_no_focus_window (display, timestamp);
else
{
MetaWindow * window;
window = meta_display_lookup_x_window (display, focus);
if (window)
meta_display_set_input_focus_window (display, window, FALSE, timestamp);
else
meta_display_focus_the_no_focus_window (display, timestamp);
}
meta_error_trap_pop (display, FALSE);
}
@ -4596,15 +4605,40 @@ meta_display_focus_sentinel_clear (MetaDisplay *display)
return (display->sentinel_counter == 0);
}
void
meta_display_set_input_focus_window (MetaDisplay *display,
MetaWindow *window,
gboolean focus_frame,
Time timestamp)
{
if (XSERVER_TIME_IS_BEFORE (timestamp, display->last_focus_time))
return;
XSetInputFocus (display->xdisplay,
focus_frame ? window->frame->xwindow : window->xwindow,
RevertToPointerRoot,
timestamp);
display->expected_focus_window = window;
display->last_focus_time = timestamp;
if (window != display->autoraise_window)
meta_display_remove_autoraise_callback (window->display);
}
void
meta_display_focus_the_no_focus_window (MetaDisplay *display,
Time timestamp)
{
if (XSERVER_TIME_IS_BEFORE (timestamp, display->last_focus_time))
return;
XSetInputFocus (display->xdisplay,
display->no_focus_window,
RevertToPointerRoot,
timestamp);
display->expected_focus_window = NULL;
display->last_focus_time = timestamp;
meta_display_remove_autoraise_callback (display);
}

39
src/display.h
View File

@ -192,10 +192,18 @@ struct _MetaDisplay
*/
MetaWindow *previously_focused_window;
/* window we are expecting a FocusIn event for
/* window we are expecting a FocusIn event for or the current focus
* window if we are not expecting any FocusIn/FocusOut events; not
* perfect because applications can call XSetInputFocus directly.
* (It could also be messed up if a timestamp later than current
* time is sent to meta_display_set_input_focus_window, though that
* would be a programming error). See bug 154598 for more info.
*/
MetaWindow *expected_focus_window;
/* last timestamp that a window was focused */
Time last_focus_time;
guint static_gravity_works : 1;
/*< private-ish >*/
@ -350,6 +358,18 @@ struct _MetaDisplay
#endif
};
/* Xserver time can wraparound, thus comparing two timestamps needs to take
* this into account. Here's a little macro to help out. If no wraparound
* has occurred, this is equivalent to
* time1 < time2
* Of course, the rest of the ugliness of this macro comes from accounting
* for the fact that wraparound can occur.
*/
#define XSERVER_TIME_IS_BEFORE(time1, time2) \
( (( time1 < time2 ) && ( time2 - time1 < ((guint32)-1)/2 )) || \
(( time1 > time2 ) && ( time1 - time2 > ((guint32)-1)/2 )) \
)
gboolean meta_display_open (const char *name);
void meta_display_close (MetaDisplay *display);
MetaScreen* meta_display_screen_for_root (MetaDisplay *display,
@ -486,8 +506,25 @@ void meta_display_increment_focus_sentinel (MetaDisplay *display);
void meta_display_decrement_focus_sentinel (MetaDisplay *display);
gboolean meta_display_focus_sentinel_clear (MetaDisplay *display);
/* meta_display_set_input_focus_window is like XSetInputFocus, except
* that (a) it can't detect timestamps later than the current time,
* since Metacity isn't part of the XServer, and thus gives erroneous
* behavior in this circumstance (so don't do it), and (b) it uses
* display->last_focus_time and display->expected_focus_window since
* we don't have access to the true Xserver ones.
*/
void meta_display_set_input_focus_window (MetaDisplay *display,
MetaWindow *window,
gboolean focus_frame,
Time timestamp);
/* meta_display_focus_the_no_focus_window is called when the
* designated no_focus_window should be focused, but is otherwise the
* same as meta_display_set_input_focus_window
*/
void meta_display_focus_the_no_focus_window (MetaDisplay *display,
Time timestamp);
void meta_display_queue_autoraise_callback (MetaDisplay *display,
MetaWindow *window);
void meta_display_remove_autoraise_callback (MetaDisplay *display);

30
src/window.c
View File

@ -47,14 +47,6 @@
#include <X11/extensions/shape.h>
#endif
/* Xserver time can wraparound, thus comparing two timestamps needs to take
* this into account. Here's a little macro to help out.
*/
#define XSERVER_TIME_IS_LATER(time1, time2) \
( ((time1 >= time2) && (time1 - time2 < G_MAXULONG / 2)) || \
((time1 < time2) && (time2 - time1 > G_MAXULONG / 2)) \
)
typedef enum
{
META_IS_CONFIGURE_REQUEST = 1 << 0,
@ -1633,7 +1625,7 @@ window_takes_focus_on_map (MetaWindow *window)
compare = window->net_wm_user_time_set ? window->net_wm_user_time : compare;
if ((window->display->focus_window == NULL) ||
(XSERVER_TIME_IS_LATER (compare, window->display->focus_window->net_wm_user_time)))
XSERVER_TIME_IS_BEFORE (window->display->focus_window->net_wm_user_time, compare))
{
meta_topic (META_DEBUG_STARTUP,
"new window %s with no intervening events\n",
@ -3284,11 +3276,10 @@ meta_window_focus (MetaWindow *window,
{
meta_topic (META_DEBUG_FOCUS,
"Focusing frame of %s\n", window->desc);
XSetInputFocus (window->display->xdisplay,
window->frame->xwindow,
RevertToPointerRoot,
meta_display_set_input_focus_window (window->display,
window,
TRUE,
timestamp);
window->display->expected_focus_window = window;
}
}
else
@ -3298,13 +3289,12 @@ meta_window_focus (MetaWindow *window,
if (window->input)
{
meta_topic (META_DEBUG_FOCUS,
"Calling XSetInputFocus() on client window %s since input = true\n",
"Setting input focus on %s since input = true\n",
window->desc);
XSetInputFocus (window->display->xdisplay,
window->xwindow,
RevertToPointerRoot,
meta_display_set_input_focus_window (window->display,
window,
FALSE,
timestamp);
window->display->expected_focus_window = window;
}
if (window->take_focus)
@ -3326,10 +3316,6 @@ meta_window_focus (MetaWindow *window,
window->wm_state_demands_attention = FALSE;
set_net_wm_state (window);
}
/* Check if there's an autoraise timeout for a different window */
if (window != window->display->autoraise_window)
meta_display_remove_autoraise_callback (window->display);
}
static void