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+;;; +modeline.el --- my modeline customizations -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;; `+modeline.el' is kind of a dumping ground for various
+;; modeline-related functions.  I probably don't use everything in
+;; here.  Credit given where possible.
+
+;;; Code:
+
+(require '+util)
+(require 'simple-modeline)
+(require 'minions)
+
+(defgroup +modeline nil
+  "Various customization options for my modeline things."
+  :prefix "+modeline-"
+  :group 'simple-modeline)
+
+(defun +modeline-buffer-name ()         ; gonsie
+  "Display the buffer name."
+  (propertize
+   (+string-align (buffer-name) 20 :before " " :ellipsis "… ")
+   'face 'bold
+   'help-echo (or (buffer-file-name)
+                  (buffer-name))
+   'mouse-face 'mode-line-highlight))
+
+(defcustom +modeline-minions-icon "&"
+  "The \"icon\" for `+modeline-minions' button."
+  :type 'string)
+
+(defun +modeline-minions ()
+  "Display a button for `minions-minor-modes-menu'."
+  (concat " "
+          (propertize
+           +modeline-minions-icon
+           'help-echo "Minor modes menu\nmouse-1: show menu."
+           'local-map (purecopy (simple-modeline-make-mouse-map
+                                 'mouse-1
+                                 (lambda (event)
+                                   (interactive "e")
+                                   (with-selected-window
+                                       (posn-window (event-start event))
+                                     (minions-minor-modes-menu)))))
+           'mouse-face 'mode-line-highlight)))
+
+(defun +modeline-major-mode ()
+  "Display the current `major-mode'."
+  (concat " "
+          (propertize (+string-truncate (format-mode-line mode-name)
+                                        12 "…")
+                      'face 'bold
+                      'keymap mode-line-major-mode-keymap
+                      'mouse-face 'mode-line-highlight)))
+
+(defcustom +modeline-modified-icon-alist '((ephemeral . "*")
+                                           (readonly . "=")
+                                           (modified  . "+")
+                                           (special . "~")
+                                           (t . "-"))
+  "\"Icons\" to display depending on buffer status in modeline.
+The CAR of each field is one of `readonly', `modified',
+`special', `ephemeral', or t, and the CDR is a string to display
+in that mode.
+
+`readonly' is true if the buffer is read-only and visiting a file.
+`modified' is true if the buffer is modified.
+`special' is true if the buffer is a special-mode or derived buffer.
+`ephemeral' is true if the buffer is not visiting a file.
+t is the fall-back, shown when nothing else in the alist applies.
+
+The order of elements matters: whichever one matches first is applied."
+  :type '(alist :key-type symbol
+                :value-type string)
+  :options '("readonly" "modified" "special" "t"))
+
+(defcustom +modeline-modified-icon-special-modes '(special-mode)
+  "Modes to apply the `special-mode' icon to in the
+`+modeline-modified'."
+  :type '(repeat function))
+
+(defun +modeline-modified () ; modified from `simple-modeline-status-modified'
+  "Display a color-coded \"icon\" indicator for the buffer's status."
+  (let* ((icon (catch :icon
+                (dolist (cell +modeline-modified-icon-alist)
+                  (when (pcase (car cell)
+                          ('ephemeral (not (buffer-file-name)))
+                          ('readonly buffer-read-only)
+                          ('modified (buffer-modified-p))
+                          ('special
+                           (apply 'derived-mode-p
+                                  +modeline-modified-icon-special-modes))
+                          ('t t)
+                          (_ nil))
+                    (throw :icon (cdr cell)))))))
+    (concat " "
+            (propertize (or icon "")
+                        'mouse-face 'mode-line-highlight))))
+
+(defun +modeline-narrowed ()
+  "Display an indication that the buffer is narrowed."
+  (when (buffer-narrowed-p)
+    (concat " "
+            (propertize "N"
+                        'help-echo (format "%s\n%s"
+                                           "Buffer is narrowed."
+                                           "mouse-2: widen buffer.")
+                        'local-map (purecopy (simple-modeline-make-mouse-map
+                                              'mouse-2 'mode-line-widen))
+                        'mouse-face 'mode-line-highlight))))
+
+(define-minor-mode file-percentage-mode
+  "Toggle the percentage display in the mode line (File Percentage Mode)."
+  :init-value t :global t :group 'mode-line)
+
+(defun +modeline-position ()            ; adapted from `simple-modeline'
+  "Display the current cursor position."
+  (list '((line-number-mode
+           ((column-number-mode
+             (column-number-indicator-zero-based
+              (9 " %l:%c")
+              (9 " %l:%C"))
+             (6 " %l:")))
+           ((column-number-mode
+             (column-number-indicator-zero-based
+              (5 " :%c")
+              (5 " :%C"))))))
+        '(file-percentage-mode
+          ((-3 "%p") "%% "))
+        (if (region-active-p)
+            (propertize (format "%s%-5d"
+                                (if (and (mark) (< (point) (mark))) "-" "+")
+                                (apply '+ (mapcar
+                                           (lambda (pos)
+                                             (- (cdr pos)
+                                                (car pos)))
+                                           (region-bounds))))
+                        'font-lock-face 'font-lock-variable-name-face))))
+
+(defun +modeline-vc ()
+  "Display the version control branch of the current buffer in the modeline."
+  ;; from https://www.gonsie.com/blorg/modeline.html, from Doom
+  (if-let ((backend (vc-backend buffer-file-name)))
+      (concat " " (substring vc-mode (+ (if (eq backend 'Hg) 2 3) 2)))))
+
+(defun +modeline-track ()
+  "Display `tracking-mode' information."
+  '(tracking-mode
+    tracking-mode-line-buffers))
+
+(defun +modeline-anzu ()
+  "Display `anzu--update-mode-line'."
+  (anzu--update-mode-line))
+
+(provide '+modeline)
+;;; +modeline.el ends here