Add a new regexp variable to control boring winner buffers

* doc/emacs/windows.texi (Window Convenience): Mention it.

* lisp/winner.el (winner-boring-buffers-regexp): New variable.

* lisp/winner.el (winner-set): Use it (bug#11151).

doc/emacs/windows.texi

@@ -538,6 +538,7 @@ Reference Manual}), and cannot exceed the size of the containing frame.
 @vindex winner-dont-bind-my-keys
 @vindex winner-ring-size
 @vindex winner-boring-buffers
+@vindex winner-boring-buffers-regexp
 @cindex Winner mode
 @cindex mode, Winner
 @cindex undoing window configuration changes
@@ -556,7 +557,8 @@ non-@code{nil} value.  By default, Winner mode stores a maximum of 200
 window configurations per frame, but you can change that by modifying
 the variable @code{winner-ring-size}.  If there are some buffers whose
 windows you wouldn't want Winner mode to restore, add their names to
-the list variable @code{winner-boring-buffers}.
+the list variable @code{winner-boring-buffers} or to the regexp
+@code{winner-boring-buffers-regexp}.
 
   Follow mode (@kbd{M-x follow-mode}) synchronizes several windows on
 the same buffer so that they always display adjacent sections of that

etc/NEWS

@@ -475,6 +475,10 @@ current and the previous or the next line, as before.
 
 * Changes in Specialized Modes and Packages in Emacs 27.1
 
++++
+** winner
+*** A new variable, `winner-boring-buffers-regexp', has been added.
+
 ** table
 ** `table-generate-source' and friends now support outputting wiki and
 mediawiki format tables.

lisp/winner.el

@@ -57,21 +57,22 @@
 
 (defcustom winner-dont-bind-my-keys nil
   "Non-nil means do not bind keys in Winner mode."
-  :type  'boolean
-  :group 'winner)
+  :type 'boolean)
 
 (defcustom winner-ring-size 200
   "Maximum number of stored window configurations per frame."
-  :type  'integer
-  :group 'winner)
+  :type 'integer)
 
 (defcustom winner-boring-buffers '("*Completions*")
   "List of buffer names whose windows `winner-undo' will not restore.
 You may want to include buffer names such as *Help*, *Apropos*,
 *Buffer List*, *info* and *Compile-Log*."
-  :type '(repeat string)
-  :group 'winner)
+  :type '(repeat string))
 
+(defcustom winner-boring-buffers-regexp nil
+  "`winner-undo' will not restore windows with buffers matching this regexp."
+  :type 'string
+  :version "27.1")
 
 
 ;;;; Saving old configurations (internal variables and subroutines)
@@ -273,8 +274,9 @@ You may want to include buffer names such as *Help*, *Apropos*,
 
 ;; Make sure point does not end up in the minibuffer and delete
 ;; windows displaying dead or boring buffers
-;; (c.f. `winner-boring-buffers').  Return nil if all the windows
-;; should be deleted.  Preserve correct points and marks.
+;; (c.f. `winner-boring-buffers') and `winner-boring-buffers-regexp'.
+;; Return nil if all the windows should be deleted.  Preserve correct
+;; points and marks.
 (defun winner-set (conf)
   ;; For the format of `conf', see `winner-conf'.
   (let* ((buffers nil)
@@ -302,8 +304,12 @@ You may want to include buffer names such as *Help*, *Apropos*,
                                     (not (= marker pos)))
                            (setq pos marker))
                          (setf (window-point win) pos)))
-                     (not (member (buffer-name (window-buffer win))
-                                  winner-boring-buffers)))
+		     (not (or (member (buffer-name (window-buffer win))
+				      winner-boring-buffers)
+			      (and winner-boring-buffers-regexp
+				   (string-match
+				    winner-boring-buffers-regexp
+				    (buffer-name (window-buffer win)))))))
           (push win xwins)))            ; delete this window
 
       ;; Restore marks
@@ -320,10 +326,10 @@ You may want to include buffer names such as *Help*, *Apropos*,
       ;; Return t if this is still a possible configuration.
       (or (null xwins)
 	  (progn
-            (mapc 'delete-window (cdr xwins)) ; delete all but one
-            (unless (one-window-p t)
-              (delete-window (car xwins))
-              t))))))
+	    (mapc 'delete-window (cdr xwins)) ; delete all but one
+	    (unless (one-window-p t)
+	      (delete-window (car xwins))
+	      t))))))