357 lines
13 KiB
EmacsLisp
357 lines
13 KiB
EmacsLisp
;;; mood-line.el --- A minimal mode-line inspired by doom-modeline. -*- lexical-binding: t; -*-
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;; Author: Jessie Hildebrandt <jessieh.net>
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;; Homepage: https://gitlab.com/jessieh/mood-line
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;; Keywords: mode-line faces
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;; Version: 1.1.2
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;; Package-Requires: ((emacs "24.4"))
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;; This file is not part of GNU Emacs.
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;;; Commentary:
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;;
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;; mood-line is a minimal mode-line configuration that aims to replicate
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;; some of the features of the doom-modeline package.
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;;
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;; Features offered:
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;; * Clean, minimal design
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;; * Anzu and multiple-cursors counter
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;; * Version control status indicator
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;; * Flycheck status indicator
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;; * Lightweight with no dependencies
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;;
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;; To enable mood-line:
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;; (mood-line-mode)
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;;; License:
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;;
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2, or
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;; (at your option) any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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;; Floor, Boston, MA 02110-1301, USA.
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;;; Code:
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;;
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;; Variable declarations
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;;
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(defvar mood-line--current-window)
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(defvar flycheck-current-errors)
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(defvar anzu--state)
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(defvar multiple-cursors-mode)
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;;
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;; Function prototypes
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;;
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(declare-function flycheck-count-errors "flycheck" (errors))
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(declare-function anzu--update-mode-line "anzu" ())
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(declare-function mc/num-cursors "multiple-cursors" ())
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;;
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;; Config
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;;
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(defgroup mood-line nil
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"A minimal mode-line configuration inspired by doom-modeline."
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:group 'mode-line)
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(defcustom mood-line-show-point nil
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"If t, the value of `point' will be displayed next to the cursor position in the mode-line."
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:group 'mood-line
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:type 'boolean)
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(defface mood-line-status-grayed-out
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'((t (:inherit (font-lock-doc-face))))
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"Face used for neutral or inactive status indicators in the mode-line."
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:group 'mood-line)
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(defface mood-line-status-info
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'((t (:inherit (font-lock-keyword-face))))
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"Face used for generic status indicators in the mode-line."
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:group 'mood-line)
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(defface mood-line-status-success
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'((t (:inherit (success))))
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"Face used for success status indicators in the mode-line."
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:group 'mood-line)
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(defface mood-line-status-warning
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'((t (:inherit (warning))))
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"Face for warning status indicators in the mode-line."
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:group 'mood-line)
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(defface mood-line-status-error
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'((t (:inherit (error))))
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"Face for error stauts indicators in the mode-line."
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:group 'mood-line)
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(defface mood-line-unimportant
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'((t (:inherit (font-lock-doc-face))))
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"Face used for less important mode-line elements."
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:group 'mood-line)
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(defface mood-line-modified
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'((t (:inherit (error))))
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"Face used for the 'modified' indicator symbol in the mode-line."
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:group 'mood-line)
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;;
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;; Helper functions
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;;
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(defun mood-line-format (left right)
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"Return a string of `window-width' length containing LEFT and RIGHT, aligned respectively."
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(let ((reserve (length right)))
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(when (and (display-graphic-p) (eq 'right (get-scroll-bar-mode)))
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(setq reserve (- reserve 3)))
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(concat
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left
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" "
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(propertize " "
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'display `((space :align-to (- (+ right right-fringe right-margin) ,(+ reserve 0)))))
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right)))
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;; Define a helper function to determine whether or not the current window is active.
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(defsubst mood-line-is-active ()
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"Return \"t\" if the current window is active, \"nil\" if it is not."
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(eq (selected-window) mood-line--current-window))
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;;
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;; Update functions
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;;
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;; Window update function
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(defvar-local mood-line--current-window (frame-selected-window))
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(defun mood-line--update-selected-window (&rest _)
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"Update the `mood-line--current-window' variable."
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(when (frame-selected-window)
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(let ((win (frame-selected-window)))
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(unless (minibuffer-window-active-p win)
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(setq mood-line--current-window win)))))
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;; VC update function
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(defvar-local mood-line--vc-text nil)
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(defun mood-line--update-vc-segment (&rest _)
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"Update `mood-line--vc-text' against the current VCS state."
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(setq mood-line--vc-text
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(when (and vc-mode buffer-file-name)
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(let ((backend (vc-backend buffer-file-name))
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(state (vc-state buffer-file-name (vc-backend buffer-file-name))))
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(let ((face 'mode-line-inactive)
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(active (mood-line-is-active)))
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(concat (cond ((memq state '(edited added))
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(if active (setq face 'mood-line-status-info))
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(propertize "✚" 'face face))
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((eq state 'needs-merge)
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(if active (setq face 'mood-line-status-warning))
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(propertize "●" 'face face))
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((eq state 'needs-update)
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(if active (setq face 'mood-line-status-warning))
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(propertize "⬆" 'face face))
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((memq state '(removed conflict unregistered))
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(if active (setq face 'mood-line-status-error))
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(propertize "✖" 'face face))
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(t
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(if active (setq face 'mood-line-status-grayed-out))
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(propertize "✔" 'face face)))
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" "
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(propertize (substring vc-mode (+ (if (eq backend 'Hg) 2 3) 2))
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'face (if active face))
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" "))))))
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;; Flycheck update function
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(defvar-local mood-line--flycheck-text nil)
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(defun mood-line--update-flycheck-segment (&optional status)
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"Update `mood-line--flycheck-text' against the reported flycheck STATUS."
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(setq mood-line--flycheck-text
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(pcase status
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('finished (if flycheck-current-errors
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(let-alist (flycheck-count-errors flycheck-current-errors)
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(let ((sum (+ (or .error 0) (or .warning 0))))
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(propertize (concat "✚ Issues: "
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(number-to-string sum)
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" ")
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'face (if .error
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'mood-line-status-error
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'mood-line-status-warning))))
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(propertize "✔ Good " 'face 'mood-line-status-success)))
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('running (propertize "● Checking " 'face 'mood-line-status-info))
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('no-checker "")
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('errored (propertize "✖ Error " 'face 'mood-line-status-error))
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('interrupted (propertize "⏸ Paused " 'face 'mood-line-status-grayed-out)))))
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;;
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;; Segments
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;;
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(defun mood-line-segment-modified ()
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"Displays a color-coded buffer modification indicator in the mode-line."
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(propertize
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(if (and
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(buffer-modified-p)
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(not (string-match-p "\\*.*\\*" (buffer-name))))
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" ● "
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" ")
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'face 'mood-line-modified))
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(defun mood-line-segment-buffer-name ()
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"Displays the name of the current buffer in the mode-line."
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(concat (propertize "%b" 'face 'mode-line-buffer-id) " "))
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(defun mood-line-segment-anzu ()
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"Displays color-coded anzu status information in the mode-line (if available)."
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(when (and (boundp 'anzu--state) anzu--state)
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(concat (anzu--update-mode-line) " ")))
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(defun mood-line-segment-multiple-cursors ()
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"Displays the number of active multiple-cursors in the mode-line (if available)."
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(when (and (boundp 'multiple-cursors-mode) multiple-cursors-mode)
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(concat "MC:"
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(format #("%d" 0 2 (face font-lock-warning-face)) (mc/num-cursors))
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" ")))
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(defun mood-line-segment-position ()
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"Displays the current cursor position in the mode-line."
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(concat "%l:%c"
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(when mood-line-show-point
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(concat ":"
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(propertize (format "%d" (point)) 'face (if (mood-line-is-active)
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'mood-line-unimportant
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'mode-line-inactive))))
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" "
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(propertize "%p%%" 'face (if (mood-line-is-active)
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'mood-line-unimportant
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'mode-line-inactive))
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" "))
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(defun mood-line-segment-encoding ()
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"Displays the encoding and EOL style of the buffer in the mode-line."
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(concat (pcase (coding-system-eol-type buffer-file-coding-system)
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(0 "LF ")
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(1 "CRLF ")
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(2 "CR "))
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(let ((sys (coding-system-plist buffer-file-coding-system)))
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(cond ((memq (plist-get sys :category) '(coding-category-undecided coding-category-utf-8))
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"UTF-8")
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(t (upcase (symbol-name (plist-get sys :name))))))
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" "))
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(defun mood-line-segment-vc ()
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"Displays color-coded version control information in the mode-line."
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mood-line--vc-text)
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(defun mood-line-segment-major-mode ()
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"Displays the current major mode in the mode-line."
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(propertize "%m "
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'face (if (mood-line-is-active)
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'bold
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'mood-line-status-grayed-out)))
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(defun mood-line-segment-global-mode-string ()
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"Displays the current value of `global-mode-string' in the mode-line."
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(let ((global (format-mode-line global-mode-string 'mood-line-status-grayed-out)))
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(unless (string-empty-p global)
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(concat global " "))))
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(defun mood-line-segment-flycheck ()
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"Displays color-coded flycheck information in the mode-line (if available)."
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mood-line--flycheck-text)
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(defun mood-line-segment-process ()
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"Displays the current value of `mode-line-process' in the mode-line."
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(when mode-line-process
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(list mode-line-process " ")))
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;;
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;; Activation function
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;;
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;; Store the default mode-line format
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(defvar mood-line--default-mode-line mode-line-format)
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;;;###autoload
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(define-minor-mode mood-line-mode
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"Toggle mood-line on or off."
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:group 'mood-line
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:global t
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:lighter nil
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(if mood-line-mode
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(progn
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;; Setup flycheck hooks
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(add-hook 'flycheck-status-changed-functions #'mood-line--update-flycheck-segment)
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(add-hook 'flycheck-mode-hook #'mood-line--update-flycheck-segment)
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;; Setup VC hooks
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(add-hook 'find-file-hook #'mood-line--update-vc-segment)
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(add-hook 'after-save-hook #'mood-line--update-vc-segment)
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(advice-add #'vc-refresh-state :after #'mood-line--update-vc-segment)
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;; Setup window update hooks
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(add-hook 'window-configuration-change-hook #'mood-line--update-selected-window)
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(add-hook 'focus-in-hook #'mood-line--update-selected-window)
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(advice-add #'handle-switch-frame :after #'mood-line--update-selected-window)
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(advice-add #'select-window :after #'mood-line--update-selected-window)
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;; Set the new mode-line-format
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(setq-default mode-line-format
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'((:eval
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(mood-line-format
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;; Left
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(format-mode-line
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'((:eval (mood-line-segment-modified))
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(:eval (mood-line-segment-buffer-name))
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(:eval (mood-line-segment-anzu))
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(:eval (mood-line-segment-multiple-cursors))
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(:eval (mood-line-segment-position))))
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;; Right
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(format-mode-line
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'((:eval (mood-line-segment-encoding))
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(:eval (mood-line-segment-vc))
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(:eval (mood-line-segment-major-mode))
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(:eval (mood-line-segment-global-mode-string))
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(:eval (mood-line-segment-flycheck))
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(:eval (mood-line-segment-process))
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" ")))))))
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(progn
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;; Remove flycheck hooks
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(remove-hook 'flycheck-status-changed-functions #'mood-line--update-flycheck-segment)
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(remove-hook 'flycheck-mode-hook #'mood-line--update-flycheck-segment)
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;; Remove VC hooks
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(remove-hook 'file-find-hook #'mood-line--update-vc-segment)
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(remove-hook 'after-save-hook #'mood-line--update-vc-segment)
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(advice-remove #'vc-refresh-state #'mood-line--update-vc-segment)
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;; Remove window update hooks
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(remove-hook 'window-configuration-change-hook #'mood-line--update-selected-window)
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(remove-hook 'focus-in-hook #'mood-line--update-selected-window)
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(advice-remove #'handle-switch-frame #'mood-line--update-selected-window)
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(advice-remove #'select-window #'mood-line--update-selected-window)
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;; Restore the original mode-line format
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(setq-default mode-line-format mood-line--default-mode-line))))
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;;
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;; Provide mood-line
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;;
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(provide 'mood-line)
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;;; mood-line.el ends here
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