update changelog

fixes #19

README.org

@@ -4,7 +4,10 @@
 
 * Contents :TOC:noexport:
 - [[#introduction][Introduction]]
- - [[#whats-changed-since-window-numbering][What's changed since window-numbering]]
+- [[#changelog][Changelog]]
+  - [[#sep-11-2019][Sep. 11 2019]]
+  - [[#nov-15-2018][Nov. 15 2018]]
+  - [[#initial-release-whats-changed-since-window-numbering][Initial release: what's changed since window-numbering]]
 - [[#installation][Installation]]
   - [[#using-melpa][Using Melpa]]
   - [[#manual-installation][Manual installation]]
@@ -25,7 +28,15 @@ from [[https://github.com/abo-abo/ace-window][ace-window]].
 This version brings, among other things, support for number sets across multiple
 frames, giving the user a smoother experience of multi-screen Emacs.
 
-* What's changed since window-numbering
+* Changelog
+** Sep. 11 2019
+- Added customize variable =winum-ignored-buffers-regexp= to ignored buffers
+  based on regexps.
+** Nov. 15 2018
+- Added customize variable =winum-format=, a format string to configure how the
+  window number appears in the mode-line
+
+** Initial release: what's changed since window-numbering
 This package brings a lot of additions to the old window-numbering:
 
 - Number sets across multiple frames, giving a smoother experience of
@@ -224,7 +235,7 @@ Several options are available through Emacs' Customize interface under
        ((equal (buffer-name) "*Calculator*") 9)
        ((equal (buffer-name) "*Flycheck errors*") 8)))
 
-    (defun winum-assign-0-to-neotree-and ()
+    (defun winum-assign-0-to-neotree ()
       (when (string-match-p (buffer-name) ".*\\*NeoTree\\*.*") 10))
 
     (add-to-list 'winum-assign-functions #'winum-assign-9-to-calculator-8-to-flycheck-errors)
@@ -241,6 +252,14 @@ Several options are available through Emacs' Customize interface under
 
   Default: =t=
 
+- =winum-format=
+
+  Format string defining how the window number looks like in the mode-line.
+  This string is passed to the =format= function along with the result of
+ =winum-get-number-string=.
+
+  Default: =" %s "=
+
 - =winum-mode-line-position=
 
   The position in the mode-line =winum-mode= displays the number.
@@ -253,6 +272,13 @@ Several options are available through Emacs' Customize interface under
 
   Default: '(" *which-key*")
 
+- =winum-ignored-buffers-regexp=
+
+  List of regexps for buffer names. Matching buffers will be ignored when
+  assigning numbers. See [[https://www.gnu.org/software/emacs/manual/html_node/emacs/Regexps.html][Emacs' documentation on regexps]] for syntax.
+
+  Default: '()
+
 - face: =winum-face=
 
   Face used for the number in the mode-line.
@@ -284,7 +310,7 @@ available winum options.
      ((equal (buffer-name) "*Calculator*") 9)
      ((equal (buffer-name) "*Flycheck errors*") 8)))
 
-  (defun winum-assign-0-to-neotree-and ()
+  (defun winum-assign-0-to-neotree ()
     (when (string-match-p (buffer-name) ".*\\*NeoTree\\*.*") 10))
 
   (add-to-list 'winum-assign-functions #'winum-assign-9-to-calculator-8-to-flycheck-errors)
@@ -297,8 +323,10 @@ available winum options.
         winum-auto-assign-0-to-minibuffer t
         winum-assign-func                 'my-winum-assign-func
         winum-auto-setup-mode-line        t
+        winum-format                      " %s "
         winum-mode-line-position          1
-        winum-ignored-buffers             '(" *which-key*"))
+        winum-ignored-buffers             '(" *which-key*")
+        winum-ignored-buffers-regexp      '(" \\*Treemacs-.*"))
 
   (winum-mode)
 #+END_SRC
@@ -321,9 +349,4 @@ available winum options.
 
 - Autocomplete read-from-minibuffer
 
-- Add =winum-format= customize variable
-
-  Format string for displaying the window number in the mode-line. Default to
-  " %n " to get a space on each side of the window number.
-
 - Things that you have thought of and I haven't :smile_cat:

winum.el

@@ -17,7 +17,7 @@
 ;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ;;
 ;; Author: Thomas de Beauchêne <thomas.de.beauchene@gmail.com>
-;; Version: 2.0.0
+;; Version: 2.2.0
 ;; Keywords: convenience, frames, windows, multi-screen
 ;; URL: http://github.com/deb0ch/winum.el
 ;; Created: 2016
@@ -143,11 +143,25 @@ numbers in the mode-line."
   :group 'winum
   :type  'integer)
 
+(defcustom winum-format " %s "
+  "Format string defining how the window number looks like in the mode-line.
+This string is passed to the `format' function along with the
+result of `winum-get-number-string'."
+  :group 'winum
+  :type  'string)
+
 (defcustom winum-ignored-buffers '(" *which-key*")
   "List of buffers to ignore when assigning numbers."
   :group 'winum
   :type  '(repeat string))
 
+(defcustom winum-ignored-buffers-regexp '()
+  "List of regexps for buffer names to ignore when assigning numbers.
+See Info node `(emacs) Regexps' or Info node `(elisp) Regular Expressions'"
+  :group 'winum
+  :type '(repeat string)
+  :risky t)
+
 (defface winum-face '()
   "Face used for the number in the mode-line."
   :group 'winum)
@@ -208,6 +222,10 @@ To get a number given a window, use the `cdr' of a value.
 
 Such a structure allows for per-frame bidirectional fast access.")
 
+(defvar winum--mode-line-segment
+  '(:eval (format winum-format (winum-get-number-string)))
+  "What is pushed into `mode-line-format' when setting it up automatically.")
+
 (defvar winum--last-used-scope winum-scope
   "Tracks the last used `winum-scope'.
 Needed to detect scope changes at runtime.")
@@ -412,23 +430,26 @@ POSITION: position in the mode-line."
     (dotimes (i (min (or position winum-mode-line-position 1)
                      (length mode-line)))
       (push (pop mode-line) res))
-    (unless (equal (car mode-line) '(:eval (winum-get-number-string)))
-      (push '(:eval (winum-get-number-string)) res))
+    (unless (equal (car mode-line) winum--mode-line-segment)
+      (push winum--mode-line-segment res))
     (while mode-line
       (push (pop mode-line) res))
-    (setq-default mode-line-format (nreverse res)))
+    (let ((nres (nreverse res)))
+      (setq mode-line-format nres)
+      (setq-default mode-line-format nres)))
   (force-mode-line-update t))
 
 (defun winum--clear-mode-line ()
   "Remove the window number of `winum-mode' from the mode-line."
   (let ((mode-line (default-value 'mode-line-format))
-        (res))
+        res)
     (while mode-line
-      (let ((item (car mode-line)))
-        (unless (equal item '(:eval (winum-get-number-string)))
-          (push item res)))
-      (pop mode-line))
-    (setq-default mode-line-format (nreverse res)))
+      (let ((item (pop mode-line)))
+        (unless (equal item winum--mode-line-segment)
+        (push item res))))
+    (let ((nres (nreverse res)))
+      (setq mode-line-format nres)
+      (setq-default mode-line-format nres)))
   (force-mode-line-update t))
 
 (defun winum--update ()
@@ -524,7 +545,10 @@ windows, however a higher number can be reserved by the user-defined
     (or (not (and (frame-live-p f)
                   (frame-visible-p f)))
         (string= "initial_terminal" (terminal-name f))
-        (member (buffer-name (window-buffer window)) winum-ignored-buffers))))
+        (member (buffer-name (window-buffer window)) winum-ignored-buffers)
+        (cl-some
+         (lambda (regex) (string-match regex (buffer-name (window-buffer window))))
+         winum-ignored-buffers-regexp))))
 
 (defun winum--list-windows-in-frame (&optional f)
   "List windows in frame F using natural Emacs ordering."