modeline: Add a simplified format for GNUS.

* modeline.el (modeline-format-gnus, modeline-gnus-format-left): A
  format for GNUS that does not display some unnecessary information.

1 files changed, 29 insertions, 0 deletions

diff --git a/modeline.el b/modeline.el
index ee2c0fd..3f98d77 100644
--- a/modeline.el
+++ b/modeline.el
@@ -90,6 +90,35 @@
       (format-mode-line global-mode-string face)))))
 
 ;;;###autoload
+(defun modeline-format-gnus ()
+  "The mode line format for GNUS."
+  (let* ((left (modeline-gnus-format-left))
+         (right (string-trim-right (modeline-format-right)))
+         (left-len (string-pixel-width left))
+         (right-len (string-pixel-width right))
+         (middle (propertize
+                  (string 32)
+                  'display
+                  (list
+                   'space
+                   :width
+                   (list
+                    (- (window-pixel-width) left-len right-len
+                       (- modeline-right-offset)))))))
+    (concat left middle right)))
+
+(defun modeline-gnus-format-left ()
+  "The left part of the mode line for GNUS."
+  (declare (side-effect-free t) (pure t))
+  (concat
+   (modeline-spc)
+   (modeline-format-buffer-name)
+   (modeline-spc)
+   (modeline-format-keycast)
+   (modeline-spc)
+   (modeline-format-minor-modes)))
+
+;;;###autoload
 (defun modeline-format-left ()
   "The left mode line format."
   (concat