Commit 872c3af4fde5

@@ -0,0 +1,57 @@
+(use-package imenu-list
+  :pin melpa
+  :ensure t
+  :commands (vde/imenu-list-display-toggle)
+  :bind (("C-'" . vde/imenu-list-display-toggle))
+  :config
+    (progn
+    (setq imenu-list-size     0.2)
+    (setq imenu-list-position 'right)
+
+    (defun vde/imenu-list-hide ()
+      (interactive)
+      (switch-to-buffer-other-window imenu-list-buffer-name)
+      (quit-window))
+
+    (defun vde/imenu-list-visible-p ()
+      "Returns `t' if the `imenu-list' buffer is visible."
+      (catch 'break
+        (dolist (win (window-list))
+          (when (string= imenu-list-buffer-name (buffer-name (window-buffer win)))
+            (throw 'break t)))))
+
+    (defun vde/imenu-list-display-toggle (noselect)
+      "Toggle the display of Imenu-list buffer.
+
+If NOSELECT is non-nil, do not select the imenu-list buffer."
+      (interactive "P")
+      (if (vde/imenu-list-visible-p)
+          (vde/imenu-list-hide)
+        (if noselect
+            (imenu-list-noselect)
+          (imenu-list))))
+
+    (defun vde/imenu-list-goto-entry-and-hide ()
+      "Execute `imenu-list-goto-entry' and hide the imenu-list buffer."
+      (interactive)
+      (imenu-list-goto-entry)
+      (vde/imenu-list-hide))
+    (bind-key "C-<return>"
+              #'vde/imenu-list-goto-entry-and-hide
+              imenu-list-major-mode-map)
+
+    (defun vde/imenu-auto-update (orig-fun &rest args)
+      "Auto update the *Ilist* buffer if visible."
+      (prog1 ; Return value of the advising fn needs to be the same as ORIG-FUN
+          (apply orig-fun args)
+        (when (vde/imenu-list-visible-p)
+          (imenu-list-update-safe)))) ; update `imenu-list' buffer
+    (advice-add 'switch-to-buffer :around #'vde/imenu-auto-update)
+    (advice-add 'revert-buffer    :around #'vde/imenu-auto-update)))
+
+(provide 'vde-imenu)
+
+;; Local Variables:
+;; coding: utf-8
+;; indent-tabs-mode: nil
+;; End:

@@ -138,6 +138,7 @@ packages.")
 (use-package vde-company)
 (use-package vde-projectile)
 (use-package vde-shells)
+(use-package vde-imenu)
 ;; Programming languages
 (use-package vde-nix)
 (use-package vde-go)