core/core: Rename and move to x11/meta-x11-window-control

The functionality core/core.c and core/core.h provides are helpers for
the window decorations. This was not possible to derive from the name
itself, thus rename it and put it in the right place.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/854

src/meson.build

@@ -330,8 +330,6 @@ mutter_sources = [
   'core/boxes-private.h',
   'core/constraints.c',
   'core/constraints.h',
-  'core/core.c',
-  'core/core.h',
   'core/delete.c',
   'core/display.c',
   'core/display-private.h',
@@ -414,6 +412,8 @@ mutter_sources = [
   'x11/meta-x11-selection-output-stream-private.h',
   'x11/meta-x11-stack.c',
   'x11/meta-x11-stack-private.h',
+  'x11/meta-x11-window-control.c',
+  'x11/meta-x11-window-control.h',
   'x11/mutter-Xatomtype.h',
   'x11/session.c',
   'x11/session.h',

src/ui/frames.c

@@ -27,7 +27,6 @@
 #include <math.h>
 #include <string.h>
 
-#include "core/core.h"
 #include "core/frame.h"
 #include "core/window-private.h"
 #include "meta/boxes.h"
@@ -36,6 +35,7 @@
 #include "meta/util.h"
 #include "ui/ui.h"
 #include "ui/frames.h"
+#include "x11/meta-x11-window-control.h"
 #include "x11/window-x11-private.h"
 #include "x11/window-x11.h"
 

src/ui/ui.c

@@ -25,13 +25,13 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "core/core.h"
 #include "meta/prefs.h"
 #include "meta/util.h"
 #include "ui/frames.h"
 #include "ui/theme-private.h"
 #include "ui/ui.h"
 #include "x11/meta-x11-display-private.h"
+#include "x11/meta-x11-window-control.h"
 
 struct _MetaUI
 {

src/x11/meta-x11-window-control.c

@@ -23,7 +23,8 @@
 
 #include "config.h"
 
-#include "core/core.h"
+#include "x11/meta-x11-window-control.h"
+
 #include "core/frame.h"
 #include "core/meta-workspace-manager-private.h"
 #include "core/util-private.h"

src/x11/meta-x11-window-control.h

@@ -20,8 +20,8 @@
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef META_CORE_H
-#define META_CORE_H
+#ifndef META_X11_WINDOW__CONTROL_H
+#define META_X11_WINDOW__CONTROL_H
 
 #include <gdk/gdkx.h>
 
@@ -77,4 +77,4 @@ void       meta_core_set_screen_cursor (Display *xdisplay,
                                         Window   frame_on_screen,
                                         MetaCursor cursor);
 
-#endif
+#endif /* META_X11_WINDOW_CONTROL_H */