+(defun riece-addon-list-mode ()
+ "Major mode for displaying addon list.
+All normal editing commands are turned off."
+ (kill-all-local-variables)
+ (buffer-disable-undo)
+ (setq major-mode 'riece-addon-list-mode
+ mode-name "AddOns"
+ mode-line-buffer-identification
+ (riece-mode-line-buffer-identification '("Riece: "))
+ truncate-lines t
+ buffer-read-only t)
+ (use-local-map riece-addon-list-mode-map)
+ (run-hooks 'riece-addon-list-mode-hook))
+
+(defun riece-command-list-addons ()
+ (interactive)
+ (save-excursion
+ (set-buffer (riece-get-buffer-create "*AddOns*" 'riece-addon-list-mode))
+ (riece-addon-list-mode)
+ (let ((inhibit-read-only t)
+ buffer-read-only
+ (pointer riece-addons)
+ enabled description point)
+ (erase-buffer)
+ (riece-kill-all-overlays)
+ (while pointer
+ (setq enabled (intern-soft (concat (symbol-name (car pointer))
+ "-enabled"))
+ description (intern-soft (concat (symbol-name (car pointer))
+ "-description")))
+ (setq point (point))
+ (insert (format "%c %S: %s\n"
+ (if (not (featurep (car pointer)))
+ ??
+ (if (null enabled)
+ ?=
+ (if (symbol-value enabled)
+ ?+
+ ?-)))
+ (car pointer)
+ (if description
+ (symbol-value description)
+ "no description")))
+ (put-text-property point (point) 'riece-addon (car pointer))
+ (setq pointer (cdr pointer)))
+ (insert "
+Symbols in the leftmost column:
+
+ + The add-on is enabled.
+ - The add-on is disabled.
+ = The add-on doesn't support enable/disable operation.
+ ? The add-on status is not known.
+"))
+ (pop-to-buffer (current-buffer))))
+
+(defun riece-command-enable-addon (addon)
+ (interactive
+ (list
+ (or (if (eq major-mode 'riece-addon-list-mode)
+ (get-text-property (point) 'riece-addon))
+ (completing-read "Add-on: "
+ (mapcar #'list riece-addons)
+ (lambda (pointer)
+ (setq enabled (intern-soft (concat (car pointer)
+ "-enabled")))
+ (and enabled
+ (null (symbol-value enabled))))
+ t))))
+ (riece-enable-addon addon)
+ (riece-command-list-addons))
+
+(defun riece-command-disable-addon (addon)
+ (interactive
+ (list
+ (or (if (eq major-mode 'riece-addon-list-mode)
+ (get-text-property (point) 'riece-addon))
+ (completing-read "Add-on: "
+ (mapcar #'list riece-addons)
+ (lambda (pointer)
+ (setq enabled (intern-soft (concat (car pointer)
+ "-enabled")))
+ (and enabled
+ (symbol-value enabled)))
+ t))))
+ (riece-disable-addon addon)
+ (riece-command-list-addons))
+