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https://github.com/brl/mutter.git
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Move manipulation of the X stack to MetaStackTracker
Since MetaStackTracker is the code that knows about the current X stacking order and the relationship between X windows and Wayland windows, it's cleaner to encapsulate stack manipulation in MetaStackTracker rather than have the calling code make the X calls and only call into MetaStackTracker to inform it about the changes. https://bugzilla.gnome.org/show_bug.cgi?id=736559
This commit is contained in:
Owen W. Taylor
parent
cb66cf6398
commit
3457366066
@ -490,10 +490,8 @@ create_guard_window (Display *xdisplay, MetaScreen *screen)
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guard_window,
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create_serial);
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meta_stack_tracker_record_lower (screen->stack_tracker,
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guard_window,
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XNextRequest (xdisplay));
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XLowerWindow (xdisplay, guard_window);
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meta_stack_tracker_lower (screen->stack_tracker,
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guard_window);
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XMapWindow (xdisplay, guard_window);
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return guard_window;
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}
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@ -39,6 +39,7 @@
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#include "frame.h"
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#include "screen-private.h"
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#include "stack-tracker.h"
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#include <meta/errors.h>
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#include <meta/util.h>
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#include <meta/compositor.h>
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@ -589,54 +590,6 @@ meta_stack_tracker_record_remove (MetaStackTracker *tracker,
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stack_tracker_apply_prediction (tracker, op);
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}
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void
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meta_stack_tracker_record_restack_windows (MetaStackTracker *tracker,
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const guint64 *windows,
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int n_windows,
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gulong serial)
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{
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int i;
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int n_x_windows = 0;
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/* XRestackWindows() isn't actually a X requests - it's broken down
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* by XLib into a series of XConfigureWindow(StackMode=below); we
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* mirror that here.
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*
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* Since there may be a mixture of X and wayland windows in the
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* stack it's ambiguous which operations we should associate with an
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* X serial number. One thing we do know though is that there will
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* be (n_x_window - 1) X requests made.
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*
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* Aside: Having a separate StackOp for this would be possible to
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* get some extra efficiency in memory allocation and in applying
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* the op, at the expense of a code complexity. Implementation hint
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* for that - keep op->restack_window.n_complete, and when receiving
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* events with intermediate serials, set n_complete rather than
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* removing the op from the queue.
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*/
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if (n_windows && META_STACK_ID_IS_X11 (windows[0]))
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n_x_windows++;
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for (i = 0; i < n_windows - 1; i++)
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{
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guint64 lower = windows[i + 1];
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gboolean involves_x = FALSE;
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if (META_STACK_ID_IS_X11 (lower))
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{
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n_x_windows++;
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/* Since the first X window is a reference point we only
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* assoicate a serial number with the operations involving
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* later X windows. */
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if (n_x_windows > 1)
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involves_x = TRUE;
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}
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meta_stack_tracker_record_lower_below (tracker, lower, windows[i],
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involves_x ? serial++ : 0);
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}
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}
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void
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meta_stack_tracker_record_raise_above (MetaStackTracker *tracker,
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guint64 window,
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@ -960,3 +913,149 @@ meta_stack_tracker_queue_sync_stack (MetaStackTracker *tracker)
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}
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}
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/* When moving an X window we sometimes need an X based sibling.
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*
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* If the given sibling is X based this function returns it back
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* otherwise it searches downwards looking for the nearest X window.
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*
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* If no X based sibling could be found return NULL. */
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static Window
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find_x11_sibling_downwards (MetaStackTracker *tracker,
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guint64 sibling)
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{
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guint64 *windows;
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int n_windows;
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int i;
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if (META_STACK_ID_IS_X11 (sibling))
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return (Window)sibling;
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meta_stack_tracker_get_stack (tracker,
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&windows, &n_windows);
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/* NB: Children are in order from bottom to top and we
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* want to search downwards for the nearest X window.
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*/
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for (i = n_windows - 1; i >= 0; i--)
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if (windows[i] == sibling)
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break;
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for (; i >= 0; i--)
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{
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if (META_STACK_ID_IS_X11 (windows[i]))
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return (Window)windows[i];
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}
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return None;
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}
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static Window
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find_x11_sibling_upwards (MetaStackTracker *tracker,
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guint64 sibling)
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{
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guint64 *windows;
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int n_windows;
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int i;
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if (META_STACK_ID_IS_X11 (sibling))
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return (Window)sibling;
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meta_stack_tracker_get_stack (tracker,
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&windows, &n_windows);
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for (i = 0; i < n_windows; i++)
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if (windows[i] == sibling)
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break;
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for (; i < n_windows; i++)
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{
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if (META_STACK_ID_IS_X11 (windows[i]))
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return (Window)windows[i];
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}
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return None;
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}
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void
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meta_stack_tracker_lower_below (MetaStackTracker *tracker,
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guint64 window,
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guint64 sibling)
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{
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gulong serial = 0;
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if (META_STACK_ID_IS_X11 (window))
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{
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XWindowChanges changes;
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serial = XNextRequest (tracker->screen->display->xdisplay);
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meta_error_trap_push (tracker->screen->display);
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changes.sibling = sibling ? find_x11_sibling_upwards (tracker,sibling) : None;
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changes.stack_mode = changes.sibling ? Below : Above;
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XConfigureWindow (tracker->screen->display->xdisplay,
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window,
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(changes.sibling ? CWSibling : 0) | CWStackMode,
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&changes);
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meta_error_trap_pop (tracker->screen->display);
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}
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meta_stack_tracker_record_lower_below (tracker,
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window, sibling,
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serial);
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}
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void
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meta_stack_tracker_lower (MetaStackTracker *tracker,
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guint64 window)
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{
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meta_stack_tracker_raise_above (tracker, window, None);
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}
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void
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meta_stack_tracker_raise_above (MetaStackTracker *tracker,
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guint64 window,
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guint64 sibling)
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{
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gulong serial = 0;
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if (META_STACK_ID_IS_X11 (window))
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{
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XWindowChanges changes;
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serial = XNextRequest (tracker->screen->display->xdisplay);
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meta_error_trap_push (tracker->screen->display);
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changes.sibling = sibling ? find_x11_sibling_downwards (tracker, sibling) : None;
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changes.stack_mode = changes.sibling ? Above : Below;
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XConfigureWindow (tracker->screen->display->xdisplay,
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(Window)window,
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(changes.sibling ? CWSibling : 0) | CWStackMode,
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&changes);
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meta_error_trap_pop (tracker->screen->display);
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}
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meta_stack_tracker_record_raise_above (tracker, window,
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sibling, serial);
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}
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void
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meta_stack_tracker_restack_windows (MetaStackTracker *tracker,
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const guint64 *windows,
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int n_windows)
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{
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int i;
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/* XRestackWindows() isn't actually a X requests - it's broken down
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* by XLib into a series of XConfigureWindow(StackMode=below); we
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* just do the same here directly. The main disadvantage of is that
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* we allocate individual ops for each lower, and also that we are
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* grabbing the libX11 lock separately for individual component.
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*/
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for (i = 0; i < n_windows - 1; i++)
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meta_stack_tracker_lower_below (tracker, windows[i + 1], windows[i]);
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}
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@ -51,10 +51,6 @@ void meta_stack_tracker_record_add (MetaStackTracker *tracker,
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void meta_stack_tracker_record_remove (MetaStackTracker *tracker,
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guint64 window,
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gulong serial);
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void meta_stack_tracker_record_restack_windows (MetaStackTracker *tracker,
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const guint64 *windows,
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int n_windows,
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gulong serial);
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void meta_stack_tracker_record_raise_above (MetaStackTracker *tracker,
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guint64 window,
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guint64 sibling,
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@ -67,6 +63,20 @@ void meta_stack_tracker_record_lower (MetaStackTracker *tracker,
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guint64 window,
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gulong serial);
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/* We also have functions that also go ahead and do the work
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*/
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void meta_stack_tracker_raise_above (MetaStackTracker *tracker,
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guint64 window,
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guint64 sibling);
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void meta_stack_tracker_lower_below (MetaStackTracker *tracker,
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guint64 window,
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guint64 sibling);
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void meta_stack_tracker_lower (MetaStackTracker *tracker,
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guint64 window);
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void meta_stack_tracker_restack_windows (MetaStackTracker *tracker,
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const guint64 *windows,
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int n_windows);
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/* These functions are used to update the stack when we get events
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* reflecting changes to the stacking order */
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void meta_stack_tracker_create_event (MetaStackTracker *tracker,
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211
src/core/stack.c
211
src/core/stack.c
@ -1085,44 +1085,6 @@ find_top_most_managed_window (MetaScreen *screen,
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return 0;
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}
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/* When moving an X window we sometimes need an X based sibling.
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*
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* If the given sibling is X based this function returns it back
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* otherwise it searches downwards looking for the nearest X window.
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*
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* If no X based sibling could be found return NULL. */
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static Window
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find_x11_sibling_downwards (MetaScreen *screen,
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guint64 sibling)
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{
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MetaStackTracker *stack_tracker = screen->stack_tracker;
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guint64 *windows;
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int n_windows;
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int i;
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if (META_STACK_ID_IS_X11 (sibling))
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return (Window)sibling;
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meta_stack_tracker_get_stack (stack_tracker,
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&windows, &n_windows);
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/* NB: Children are in order from bottom to top and we
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* want to search downwards for the nearest X window.
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*/
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for (i = n_windows - 1; i >= 0; i--)
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if (windows[i] == sibling)
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break;
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for (; i >= 0; i--)
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{
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if (META_STACK_ID_IS_X11 (windows[i]))
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return (Window)windows[i];
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}
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return None;
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}
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/**
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* raise_window_relative_to_managed_windows:
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*
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@ -1149,27 +1111,15 @@ static void
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raise_window_relative_to_managed_windows (MetaScreen *screen,
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guint64 stack_id)
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{
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gulong serial = 0;
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guint64 sibling;
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sibling = find_top_most_managed_window (screen, stack_id);
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if (!sibling)
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{
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if (META_STACK_ID_IS_X11 (stack_id))
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{
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serial = XNextRequest (screen->display->xdisplay);
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meta_error_trap_push (screen->display);
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XLowerWindow (screen->display->xdisplay,
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stack_id);
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meta_error_trap_pop (screen->display);
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}
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/* No sibling to use, just lower ourselves to the bottom
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* to be sure we're below any override redirect windows.
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*/
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meta_stack_tracker_record_lower (screen->stack_tracker,
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stack_id,
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serial);
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meta_stack_tracker_lower (screen->stack_tracker, stack_id);
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return;
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}
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@ -1179,40 +1129,8 @@ raise_window_relative_to_managed_windows (MetaScreen *screen,
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meta_display_describe_stack_id (screen->display, stack_id),
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meta_display_describe_stack_id (screen->display, sibling));
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if (META_STACK_ID_IS_X11 (stack_id))
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{
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XWindowChanges changes;
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Window x11_sibling = find_x11_sibling_downwards (screen, sibling);
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serial = XNextRequest (screen->display->xdisplay);
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if (x11_sibling)
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{
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changes.sibling = x11_sibling;
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changes.stack_mode = Above;
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meta_error_trap_push (screen->display);
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XConfigureWindow (screen->display->xdisplay,
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(Window)stack_id,
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CWSibling | CWStackMode,
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&changes);
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meta_error_trap_pop (screen->display);
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}
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else
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{
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/* No sibling to use, just lower ourselves to the bottom
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* to be sure we're below any override redirect windows.
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*/
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meta_error_trap_push (screen->display);
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XLowerWindow (screen->display->xdisplay,
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(Window)stack_id);
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meta_error_trap_pop (screen->display);
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}
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}
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meta_stack_tracker_record_raise_above (screen->stack_tracker,
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stack_id,
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sibling,
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serial);
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meta_stack_tracker_raise_above (screen->stack_tracker,
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stack_id, sibling);
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}
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/**
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@ -1232,10 +1150,8 @@ static void
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stack_sync_to_xserver (MetaStack *stack)
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{
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GArray *x11_stacked;
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GArray *x11_root_children_stacked;
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GArray *all_root_children_stacked; /* wayland OR x11 */
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GList *tmp;
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GArray *x11_hidden;
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GArray *x11_hidden_stack_ids;
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int n_override_redirect = 0;
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@ -1255,14 +1171,11 @@ stack_sync_to_xserver (MetaStack *stack)
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x11_stacked = g_array_new (FALSE, FALSE, sizeof (Window));
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all_root_children_stacked = g_array_new (FALSE, FALSE, sizeof (guint64));
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x11_root_children_stacked = g_array_new (FALSE, FALSE, sizeof (Window));
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x11_hidden_stack_ids = g_array_new (FALSE, FALSE, sizeof (guint64));
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x11_hidden = g_array_new (FALSE, FALSE, sizeof (Window));
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/* The screen guard window sits above all hidden windows and acts as
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* a barrier to input reaching these windows. */
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g_array_append_val (x11_hidden, stack->screen->guard_window);
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g_array_append_val (x11_hidden_stack_ids, stack->screen->guard_window);
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meta_topic (META_DEBUG_STACK, "Top to bottom: ");
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meta_push_no_msg_prefix ();
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@ -1302,16 +1215,11 @@ stack_sync_to_xserver (MetaStack *stack)
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guint64 stack_id = top_level_window;
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g_array_append_val (x11_hidden_stack_ids, stack_id);
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g_array_append_val (x11_hidden, top_level_window);
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}
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continue;
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}
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g_array_append_val (all_root_children_stacked, stack_id);
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/* build XRestackWindows() array from top to bottom */
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if (w->client_type == META_WINDOW_CLIENT_TYPE_X11)
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g_array_append_val (x11_root_children_stacked, top_level_window);
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}
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meta_topic (META_DEBUG_STACK, "\n");
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@ -1338,18 +1246,9 @@ stack_sync_to_xserver (MetaStack *stack)
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if (all_root_children_stacked->len > 1)
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{
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gulong serial = 0;
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if (x11_root_children_stacked->len > 1)
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{
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serial = XNextRequest (stack->screen->display->xdisplay);
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XRestackWindows (stack->screen->display->xdisplay,
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(Window *) x11_root_children_stacked->data,
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x11_root_children_stacked->len);
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}
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meta_stack_tracker_record_restack_windows (stack->screen->stack_tracker,
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(guint64 *) all_root_children_stacked->data,
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all_root_children_stacked->len,
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serial);
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meta_stack_tracker_restack_windows (stack->screen->stack_tracker,
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(guint64 *) all_root_children_stacked->data,
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all_root_children_stacked->len);
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}
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}
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else if (all_root_children_stacked->len > 0)
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@ -1428,8 +1327,6 @@ stack_sync_to_xserver (MetaStack *stack)
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}
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else
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{
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gulong serial = 0;
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/* This means that if last_xwindow is dead, but not
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* *newp, then we fail to restack *newp; but on
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* unmanaging last_xwindow, we'll fix it up.
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@ -1439,23 +1336,8 @@ stack_sync_to_xserver (MetaStack *stack)
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meta_display_describe_stack_id (stack->screen->display, *newp),
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last_xwindow);
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if (META_STACK_ID_IS_X11 (*newp))
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{
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XWindowChanges changes;
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serial = XNextRequest (stack->screen->display->xdisplay);
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changes.sibling = last_xwindow;
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changes.stack_mode = Below;
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XConfigureWindow (stack->screen->display->xdisplay,
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(Window)*newp,
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CWSibling | CWStackMode,
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&changes);
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}
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|
||||
meta_stack_tracker_record_lower_below (stack->screen->stack_tracker,
|
||||
*newp, last_window,
|
||||
serial);
|
||||
meta_stack_tracker_lower_below (stack->screen->stack_tracker,
|
||||
*newp, last_window);
|
||||
}
|
||||
|
||||
if (META_STACK_ID_IS_X11 (*newp))
|
||||
@ -1467,84 +1349,27 @@ stack_sync_to_xserver (MetaStack *stack)
|
||||
|
||||
if (newp != new_end)
|
||||
{
|
||||
const guint64 *x_ref;
|
||||
unsigned long serial = 0;
|
||||
|
||||
/* Restack remaining windows */
|
||||
meta_topic (META_DEBUG_STACK, "Restacking remaining %d windows\n",
|
||||
(int) (new_end - newp));
|
||||
|
||||
/* rewind until we find the last stacked X window that we can use
|
||||
* as a reference point for re-stacking remaining X windows */
|
||||
if (newp != new_stack)
|
||||
for (x_ref = newp - 1;
|
||||
META_STACK_ID_IS_X11 (*x_ref) && x_ref > new_stack;
|
||||
x_ref--)
|
||||
;
|
||||
else
|
||||
x_ref = new_stack;
|
||||
|
||||
/* If we didn't find an X window looking backwards then walk forwards
|
||||
* through the remaining windows to find the first remaining X window
|
||||
* instead. */
|
||||
if (META_STACK_ID_IS_X11 (*x_ref))
|
||||
{
|
||||
for (x_ref = newp;
|
||||
META_STACK_ID_IS_X11 (*x_ref) && x_ref < new_end;
|
||||
x_ref++)
|
||||
;
|
||||
}
|
||||
|
||||
/* If there are any X windows remaining unstacked then restack them */
|
||||
if (META_STACK_ID_IS_X11 (*x_ref))
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = x11_root_children_stacked->len - 1; i; i--)
|
||||
{
|
||||
Window *reference = &g_array_index (x11_root_children_stacked, Window, i);
|
||||
|
||||
if (*reference == (Window)*x_ref)
|
||||
{
|
||||
int n = x11_root_children_stacked->len - i;
|
||||
|
||||
/* There's no point restacking if there's only one X window */
|
||||
if (n == 1)
|
||||
break;
|
||||
|
||||
serial = XNextRequest (stack->screen->display->xdisplay);
|
||||
XRestackWindows (stack->screen->display->xdisplay,
|
||||
reference, n);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* We need to include an already-stacked window
|
||||
* in the restack call, so we get in the proper position
|
||||
* with respect to it.
|
||||
*/
|
||||
if (newp != new_stack)
|
||||
newp = MIN (newp - 1, x_ref);
|
||||
meta_stack_tracker_record_restack_windows (stack->screen->stack_tracker,
|
||||
newp, new_end - newp,
|
||||
serial);
|
||||
--newp;
|
||||
meta_stack_tracker_restack_windows (stack->screen->stack_tracker,
|
||||
newp, new_end - newp);
|
||||
}
|
||||
}
|
||||
|
||||
/* Push hidden X windows to the bottom of the stack under the guard window */
|
||||
meta_stack_tracker_record_lower (stack->screen->stack_tracker,
|
||||
stack->screen->guard_window,
|
||||
XNextRequest (stack->screen->display->xdisplay));
|
||||
XLowerWindow (stack->screen->display->xdisplay, stack->screen->guard_window);
|
||||
meta_stack_tracker_record_restack_windows (stack->screen->stack_tracker,
|
||||
(guint64 *)x11_hidden_stack_ids->data,
|
||||
x11_hidden_stack_ids->len,
|
||||
XNextRequest (stack->screen->display->xdisplay));
|
||||
XRestackWindows (stack->screen->display->xdisplay,
|
||||
(Window *)x11_hidden->data,
|
||||
x11_hidden->len);
|
||||
g_array_free (x11_hidden, TRUE);
|
||||
meta_stack_tracker_lower (stack->screen->stack_tracker,
|
||||
stack->screen->guard_window);
|
||||
meta_stack_tracker_restack_windows (stack->screen->stack_tracker,
|
||||
(guint64 *)x11_hidden_stack_ids->data,
|
||||
x11_hidden_stack_ids->len);
|
||||
g_array_free (x11_hidden_stack_ids, TRUE);
|
||||
|
||||
meta_error_trap_pop (stack->screen->display);
|
||||
@ -1576,8 +1401,6 @@ stack_sync_to_xserver (MetaStack *stack)
|
||||
free_last_all_root_children_stacked_cache (stack);
|
||||
stack->last_all_root_children_stacked = all_root_children_stacked;
|
||||
|
||||
g_array_free (x11_root_children_stacked, TRUE);
|
||||
|
||||
/* That was scary... */
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user