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;;; my-mode-line.el --- Custom mode-line on top of mode-line-maker -*- lexical-binding: t; -*-
(require 'mode-line-maker)
(defface my/mode-line-evil-normal
'((t (:inherit font-lock-keyword-face :weight bold)))
"Face for the evil normal state indicator.")
(defface my/mode-line-evil-insert
'((t (:inherit success :weight bold)))
"Face for the evil insert state indicator.")
(defface my/mode-line-evil-visual
'((t (:inherit warning :weight bold)))
"Face for the evil visual state indicator.")
(defface my/mode-line-evil-replace
'((t (:inherit error :weight bold)))
"Face for the evil replace state indicator.")
(defface my/mode-line-evil-motion
'((t (:inherit font-lock-constant-face :weight bold)))
"Face for the evil motion state indicator.")
(defface my/mode-line-evil-emacs
'((t (:inherit font-lock-builtin-face :weight bold)))
"Face for the evil Emacs state indicator.")
(defface my/mode-line-buffer-icon-face
'((t (:inherit mode-line-buffer-id)))
"Face for the current buffer's file or mode icon.")
(defface my/mode-line-irc-face
'((t (:inherit font-lock-builtin-face :weight bold)))
"Face for the IRC activity indicator.")
(defface my/mode-line-mu4e-face
'((t (:inherit warning :weight bold)))
"Face for the unread mail indicator.")
(defface my/mode-line-time-face
'((t (:inherit font-lock-constant-face)))
"Face for the time segment.")
(defface my/mode-line-state-saved-face
'((t (:inherit success)))
"Face for the saved buffer state icon.")
(defface my/mode-line-state-modified-face
'((t (:inherit warning :weight bold)))
"Face for the modified buffer state icon.")
(defface my/mode-line-state-read-only-face
'((t (:inherit error)))
"Face for the read-only buffer state icon.")
(defvar-local my/mode-line--buffer-title nil)
(defun my/mode-line--update-title-cache ()
"Update the cached #+title for the current buffer."
(setq-local my/mode-line--buffer-title
(and (derived-mode-p 'org-mode)
(cadar (org-collect-keywords '("TITLE"))))))
(defun my/mode-line--buffer-title ()
"Return the cached #+title, computing it if necessary."
(unless (local-variable-p 'my/mode-line--buffer-title)
(my/mode-line--update-title-cache))
my/mode-line--buffer-title)
(defun my/mode-line--invalidate-title-cache ()
"Invalidate the cached title so it gets recomputed on next update."
(kill-local-variable 'my/mode-line--buffer-title))
(defun my/mode-line-buffer-name ()
"Buffer name for the mode line.
Uses the Org #+title if present, otherwise the file path relative to
the project root, falling back to the plain buffer name."
(or (my/mode-line--buffer-title)
(if-let* ((file buffer-file-name)
(project (project-current))
(root (project-root project)))
(file-relative-name file root)
(buffer-name))))
(defun my/mode-line--nerd-icons-p ()
"Return non-nil when Nerd Icons are enabled and available."
(and (bound-and-true-p ek-use-nerd-fonts)
(require 'nerd-icons nil t)))
(defun my/mode-line--icon (name face &optional fallback)
"Render Nerd icon NAME with FACE, or FALLBACK when unavailable."
(if (my/mode-line--nerd-icons-p)
(propertize (nerd-icons-mdicon name) 'face face)
(propertize (or fallback "") 'face face)))
(defun my/mode-line-buffer-icon ()
"Nerd icon for the current buffer, or nil."
(when (my/mode-line--nerd-icons-p)
(or (and buffer-file-name
(ignore-errors
(nerd-icons-icon-for-file
buffer-file-name :face 'my/mode-line-buffer-icon-face)))
(ignore-errors
(nerd-icons-icon-for-mode
major-mode :face 'my/mode-line-buffer-icon-face)))))
(defconst my/mode-line--evil-states
'((normal "N" my/mode-line-evil-normal)
(insert "I" my/mode-line-evil-insert)
(visual "V" my/mode-line-evil-visual)
(replace "R" my/mode-line-evil-replace)
(motion "M" my/mode-line-evil-motion)
(emacs "E" my/mode-line-evil-emacs))
"Display labels and theme-derived faces for Evil states.")
(defun my/mode-line-evil-state ()
"Compact, theme-aware indicator for the current Evil state."
(when (bound-and-true-p evil-state)
(let* ((entry (assq evil-state my/mode-line--evil-states))
(tag (or (nth 1 entry)
(upcase (substring (symbol-name evil-state) 0 1))))
(face (or (nth 2 entry) 'my/mode-line-evil-normal)))
(propertize (format " %s " tag) 'face face))))
(defun my/mode-line-buffer-state ()
"Render a clean lock, edit, or saved indicator for the current buffer."
(cond
(buffer-read-only
(my/mode-line--icon "nf-md-lock"
'my/mode-line-state-read-only-face "RO"))
((buffer-modified-p)
(my/mode-line--icon "nf-md-pencil"
'my/mode-line-state-modified-face "*"))
(t
(my/mode-line--icon "nf-md-check"
'my/mode-line-state-saved-face "="))))
(defun my/mode-line-remote ()
"Show a remote indicator only for an actual remote directory.
Unlike the built-in `mode-line-remote', local buffers render nothing instead
of a literal dash."
(when (file-remote-p default-directory)
(my/mode-line--icon "nf-md-cloud_outline"
'font-lock-constant-face "@")))
(defun my/mode-line-irc ()
"IRC activity indicator: icon plus number of buffers with unread activity."
(when (bound-and-true-p erc-modified-channels-alist)
(let ((icon (my/mode-line--icon "nf-md-forum_outline"
'my/mode-line-irc-face "irc")))
(propertize (format "%s %d" icon
(length erc-modified-channels-alist))
'face 'my/mode-line-irc-face))))
(defun my/mode-line-mu4e ()
"Unread mail indicator from mu4e-alert, or nil when mu4e is not in use."
(when (bound-and-true-p mu4e-alert-mode-line)
(let ((icon (my/mode-line--icon "nf-md-email_outline"
'my/mode-line-mu4e-face "mail")))
(propertize (format "%s %s" icon
(string-trim mu4e-alert-mode-line))
'face 'my/mode-line-mu4e-face))))
(defvar my/mode-line--clock-icons
["nf-md-clock_time_twelve" "nf-md-clock_time_one" "nf-md-clock_time_two"
"nf-md-clock_time_three" "nf-md-clock_time_four" "nf-md-clock_time_five"
"nf-md-clock_time_six" "nf-md-clock_time_seven" "nf-md-clock_time_eight"
"nf-md-clock_time_nine" "nf-md-clock_time_ten" "nf-md-clock_time_eleven"]
"Nerd icon clock faces indexed by hour modulo 12.")
(defun my/mode-line-time ()
"Time with a live clock icon showing the current hour."
(when (bound-and-true-p display-time-string)
(let* ((hour (% (string-to-number (format-time-string "%I")) 12))
(icon (and (my/mode-line--nerd-icons-p)
(nerd-icons-mdicon (aref my/mode-line--clock-icons hour))))
(time (string-trim display-time-string)))
(propertize (if icon (concat icon " " time) time)
'face 'my/mode-line-time-face))))
(defun my/mode-line-sync-theme (&optional _theme)
"Make helper padding inherit the live header-line theme face.
Optional THEME is ignored so this function also fits
`enable-theme-functions'."
(set-face-attribute 'mode-line-maker-padding-face nil
:inherit 'header-line
:foreground 'unspecified
:background 'unspecified
:box nil
:overline nil
:underline nil
:inverse-video nil
:strike-through nil))
(defun my/mode-line-install ()
"Install the custom mode-line built with mode-line-maker.
The mode-line lives at the top of the window via `header-line-format';
the bottom mode-line is hidden."
(setq global-mode-string (delq 'display-time-string global-mode-string))
(my/mode-line-sync-theme)
(add-hook 'enable-theme-functions #'my/mode-line-sync-theme)
(setq-default mode-line-format nil)
(setq-default header-line-format
(mode-line-maker
'((:eval (my/mode-line-evil-state)) " "
(:eval (my/mode-line-buffer-state))
(:eval (my/mode-line-remote)) " "
(:eval (my/mode-line-buffer-icon)) " "
(:eval (propertize (my/mode-line-buffer-name)
'face 'mode-line-buffer-id
'mouse-face 'mode-line-highlight
'help-echo (concat (or buffer-file-truename (buffer-name))
"\nmouse-1: Previous buffer\nmouse-3: Next buffer")
'local-map mode-line-buffer-identification-keymap)) " "
mode-line-position)
'("" (:eval (my/mode-line-irc)) " "
(:eval (my/mode-line-mu4e)) " "
mode-line-process " "
(:eval (my/mode-line-time)) " "
mode-name " ")))
(add-hook 'before-save-hook #'my/mode-line--invalidate-title-cache))
(provide 'my-mode-line)
;;; my-mode-line.el ends here
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