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(xg_display_open): Reset default display if none exists.

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(xg_display_close): Allow Emacs to close all displays (bug#985).
This commit is contained in:
Chong Yidong 2008-10-07 17:46:48 +00:00
parent 5762590b5c
commit c1ffddfc86
1 changed files with 17 additions and 26 deletions
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43
src/gtkutil.c
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@ -53,13 +53,11 @@ along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_GTK_MULTIDISPLAY
/* Gtk does not work well without any display open. Emacs may close
all its displays. In that case, keep a display around just for
the purpose of having one. */
/* Keep track of the default display, or NULL if there is none. Emacs
may close all its displays. */
static GdkDisplay *gdpy_def;
/* Return the GdkDisplay that corresponds to the X display DPY. */
static GdkDisplay *
@ -121,8 +119,11 @@ xg_display_open (display_name, dpy)
GdkDisplay *gdpy;
gdpy = gdk_display_open (display_name);
*dpy = gdpy ? GDK_DISPLAY_XDISPLAY (gdpy) : NULL;
if (!gdpy_def)
gdk_display_manager_set_default_display (gdk_display_manager_get (),
gdpy);
*dpy = gdpy ? GDK_DISPLAY_XDISPLAY (gdpy) : NULL;
return gdpy != NULL;
#else /* not HAVE_GTK_MULTIDISPLAY */
@ -140,40 +141,30 @@ xg_display_close (Display *dpy)
#ifdef HAVE_GTK_MULTIDISPLAY
GdkDisplay *gdpy = gdk_x11_lookup_xdisplay (dpy);
/* If this is the default display, we must change it before calling
dispose, otherwise it will crash on some Gtk+ versions. */
/* If this is the default display, try to change it before closing.
If there is no other display to use, gdpy_def is set to NULL, and
the next call to xg_display_open resets the default display. */
if (gdk_display_get_default () == gdpy)
{
struct x_display_info *dpyinfo;
Display *new_dpy = 0;
GdkDisplay *gdpy_new;
GdkDisplay *gdpy_new = NULL;
/* Find another display. */
for (dpyinfo = x_display_list; dpyinfo; dpyinfo = dpyinfo->next)
if (dpyinfo->display != dpy)
{
new_dpy = dpyinfo->display;
gdpy_new = gdk_x11_lookup_xdisplay (dpyinfo->display);
gdk_display_manager_set_default_display (gdk_display_manager_get (),
gdpy_new);
break;
}
if (new_dpy)
gdpy_new = gdk_x11_lookup_xdisplay (new_dpy);
else
{
if (!gdpy_def)
gdpy_def = gdk_display_open (gdk_display_get_name (gdpy));
gdpy_new = gdpy_def;
}
gdk_display_manager_set_default_display (gdk_display_manager_get (),
gdpy_new);
gdpy_def = gdpy_new;
}
/* GTK 2.2-2.8 has a bug that makes gdk_display_close crash (bug
http://bugzilla.gnome.org/show_bug.cgi?id=85715). This way
we can continue running, but there will be memory leaks. */
#if GTK_MAJOR_VERSION == 2 && GTK_MINOR_VERSION < 10
/* GTK 2.2-2.8 has a bug that makes gdk_display_close crash (bug
http://bugzilla.gnome.org/show_bug.cgi?id=85715). This way we
can continue running, but there will be memory leaks. */
g_object_run_dispose (G_OBJECT (gdpy));
#else
/* This seems to be fixed in GTK 2.10. */