Relocate platform-independent menu definitions from xmenu.c.

src/keyboard.h

@@ -18,6 +18,7 @@ You should have received a copy of the GNU General Public License
 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "systime.h"		/* for EMACS_TIME */
+#include "coding.h"             /* for ENCODE_UTF_8 and ENCODE_SYSTEM */
 
 /* Length of echobuf field in each KBOARD.  */
 
@@ -194,9 +195,6 @@ extern KBOARD the_only_kboard;
 #define single_kboard 1
 #endif
 
-extern Lisp_Object Vlucid_menu_bar_dirty_flag;
-extern Lisp_Object Qrecompute_lucid_menubar, Qactivate_menubar_hook;
-
 /* Total number of times read_char has returned.  */
 extern int num_input_events;
 
@@ -220,6 +218,11 @@ extern int this_command_key_count;
    generated by the next character.  */
 extern Lisp_Object internal_last_event_frame;
 
+/* Menu items.  */
+
+extern Lisp_Object Vlucid_menu_bar_dirty_flag;
+extern Lisp_Object Qrecompute_lucid_menubar, Qactivate_menubar_hook;
+
 /* This holds a Lisp vector that holds the properties of a single
    menu item while decoding it in parse_menu_item.
    Using a Lisp vector to hold this information while we decode it
@@ -249,6 +252,82 @@ extern Lisp_Object item_properties;
 /* Last property. */
 /* Not nil if item is enabled.  */
 #define ITEM_PROPERTY_ENABLE 8
+
+#ifdef HAVE_X_WINDOWS
+
+/* This holds a Lisp vector that holds the results of decoding
+   the keymaps or alist-of-alists that specify a menu.
+
+   It describes the panes and items within the panes.
+
+   Each pane is described by 3 elements in the vector:
+   t, the pane name, the pane's prefix key.
+   Then follow the pane's items, with 5 elements per item:
+   the item string, the enable flag, the item's value,
+   the definition, and the equivalent keyboard key's description string.
+
+   In some cases, multiple levels of menus may be described.
+   A single vector slot containing nil indicates the start of a submenu.
+   A single vector slot containing lambda indicates the end of a submenu.
+   The submenu follows a menu item which is the way to reach the submenu.
+
+   A single vector slot containing quote indicates that the
+   following items should appear on the right of a dialog box.
+
+   Using a Lisp vector to hold this information while we decode it
+   takes care of protecting all the data from GC.  */
+extern Lisp_Object menu_items;
+
+/* If non-nil, means that the global vars defined here are already in use.
+   Used to detect cases where we try to re-enter this non-reentrant code.  */
+extern Lisp_Object menu_items_inuse;
+
+/* Number of slots currently allocated in menu_items.  */
+extern int menu_items_allocated;
+
+/* This is the index in menu_items of the first empty slot.  */
+extern int menu_items_used;
+
+/* The number of panes currently recorded in menu_items,
+   excluding those within submenus.  */
+extern int menu_items_n_panes;
+
+#define MENU_ITEMS_PANE_NAME 1
+#define MENU_ITEMS_PANE_PREFIX 2
+#define MENU_ITEMS_PANE_LENGTH 3
+
+enum menu_item_idx
+{
+  MENU_ITEMS_ITEM_NAME = 0,
+  MENU_ITEMS_ITEM_ENABLE,
+  MENU_ITEMS_ITEM_VALUE,
+  MENU_ITEMS_ITEM_EQUIV_KEY,
+  MENU_ITEMS_ITEM_DEFINITION,
+  MENU_ITEMS_ITEM_TYPE,
+  MENU_ITEMS_ITEM_SELECTED,
+  MENU_ITEMS_ITEM_HELP,
+  MENU_ITEMS_ITEM_LENGTH
+};
+
+extern Lisp_Object unuse_menu_items P_ ((Lisp_Object dummy));
+
+/* This is how to deal with multibyte text if HAVE_MULTILINGUAL_MENU
+   isn't defined.  The use of HAVE_MULTILINGUAL_MENU could probably be
+   confined to an extended version of this with sections of code below
+   using it unconditionally.  */
+#ifdef HAVE_X_WINDOWS
+#ifdef USE_GTK
+/* gtk just uses utf-8.  */
+# define ENCODE_MENU_STRING(str) ENCODE_UTF_8 (str)
+#elif defined HAVE_X_I18N
+#define ENCODE_MENU_STRING(str) ENCODE_SYSTEM (str)
+#else
+#define ENCODE_MENU_STRING(str) string_make_unibyte (str)
+#endif /* USE_GTK  */
+#elif defined (HAVE_NTGUI)
+#define ENCODE_MENU_STRING(str) (str)
+#endif
+#endif /* HAVE_X_WINDOWS  */
 
 /* Macros for dealing with lispy events.  */