Implement tool-bar separators for non-GTK tool-bars.

* lisp/tool-bar.el (tool-bar--image-expression): New function.
(tool-bar-local-item, tool-bar--image-exp): Use it.
(tool-bar-setup): Initialize tool-bar-separator-image-expression.
Use :enable instead of :visible to avoid changing the tool-bar
configuration unnecessarily.

* src/keyboard.c (Vtool_bar_separator_image_expression): New variable.
(parse_tool_bar_item): Use it to obtain image separators for
displays not using native tool-bar separators.

* src/xdisp.c (build_desired_tool_bar_string): Don't handle separators
specially, since this is now done in parse_tool_bar_item.

* lisp/info.el (info-tool-bar-map): Add separators.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/keyboard.c b/src/keyboard.c
index 959c57a81e3..27c311d72e2 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -212,6 +212,12 @@ Lisp_Object Vprefix_help_command;
 /* List of items that should move to the end of the menu bar.  */
 Lisp_Object Vmenu_bar_final_items;
 
+/* Expression to evaluate for the tool bar separator image.
+   This is used for build_desired_tool_bar_string only.  For GTK, we
+   use GTK tool bar seperators.  */
+
+Lisp_Object Vtool_bar_separator_image_expression;
+
 /* Non-nil means show the equivalent key-binding for
    any M-x command that has one.
    The value can be a length of time to show the message for.
@@ -8294,6 +8300,15 @@ parse_tool_bar_item (Lisp_Object key, Lisp_Object item)
       if (menu_separator_name_p (SDATA (caption)))
 	{
 	  PROP (TOOL_BAR_ITEM_TYPE) = Qt;
+#if !defined (USE_GTK) && !defined (HAVE_NS)
+	  /* If we use build_desired_tool_bar_string to render the
+	     tool bar, the separator is rendered as an image.  */
+	  PROP (TOOL_BAR_ITEM_IMAGES)
+	    = menu_item_eval_property (Vtool_bar_separator_image_expression);
+	  PROP (TOOL_BAR_ITEM_ENABLED_P) = Qnil;
+	  PROP (TOOL_BAR_ITEM_SELECTED_P) = Qnil;
+	  PROP (TOOL_BAR_ITEM_CAPTION) = Qnil;
+#endif
 	  return 1;
 	}
       return 0;
@@ -12151,6 +12166,12 @@ might happen repeatedly and make Emacs nonfunctional.  */);
 The elements of the list are event types that may have menu bar bindings.  */);
   Vmenu_bar_final_items = Qnil;
 
+  DEFVAR_LISP ("tool-bar-separator-image-expression", &Vtool_bar_separator_image_expression,
+    doc: /* Expression evaluating to the image spec for a tool-bar separator.
+This is used internally by graphical displays that do not render
+tool-bar separators natively.  Otherwise it is unused (e.g. on GTK).  */);
+  Vtool_bar_separator_image_expression = Qnil;
+
   DEFVAR_KBOARD ("overriding-terminal-local-map",
 		 Voverriding_terminal_local_map,
 		 doc: /* Per-terminal keymap that overrides all other local keymaps.