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;;; feebleline.el --- Replace modeline with a slimmer proxy
;; Copyright 2018 Benjamin Lindqvist
;; Author: Benjamin Lindqvist <benjamin.lindqvist@gmail.com>
;; Maintainer: Benjamin Lindqvist <benjamin.lindqvist@gmail.com>
;; URL: https://github.com/tautologyclub/feebleline
;; Package-Version: 2.0
;; Version: 2.0
;; This file is not part of GNU Emacs.
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; For hardline Luddite editing!
;; Feebleline removes the modeline and replaces it with a slimmer proxy
;; version, which displays some basic information in the echo area
;; instead. This information is only displayed if the echo area is not used
;; for anything else (but if you switch frame/window, it will replace whatever
;; message is currently displayed).
;; Feebleline now has a much improved customization interface. Simply set
;; feebleline-msg-functions to whatever you want! Example:
;; (setq
;; feebleline-msg-functions
;; '((feebleline-line-number)
;; (feebleline-column-number)
;; (feebleline-file-directory)
;; (feebleline-file-or-buffer-name)
;; (feebleline-file-modified-star)
;; (magit-get-current-branch)
;; (projectile-project-name)))
;; The elements should be functions, accepting no arguments, returning either
;; nil or a valid string. Even lambda functions work (but don't forget to quote
;; them). Optionally, you can include keywords after each function, like so:
;; (feebleline-line-number :post "" :fmt "%5s")
;; Accepted keys are pre, post, face, fmt and align.
;; See source code for inspiration.
;;; Code:
(require 'cl-macs)
(autoload 'magit-get-current-branch "magit")
(defun feebleline-git-branch ()
"Return current git branch, unless file is remote."
(if (and (buffer-file-name) (file-remote-p (buffer-file-name)))
""
(let ((branch (shell-command-to-string
"git rev-parse --symbolic-full-name --abbrev-ref HEAD 2>/dev/null")))
(string-trim (replace-regexp-in-string
"^HEAD" "(detached HEAD)"
branch)))
))
(defcustom feebleline-msg-functions
'((feebleline-line-number :post "" :fmt "%5s")
(feebleline-column-number :pre ":" :fmt "%-2s")
(feebleline-file-directory :face feebleline-dir-face :post "")
(feebleline-file-or-buffer-name :face font-lock-keyword-face :post "")
(feebleline-file-modified-star :face font-lock-warning-face :post "")
(feebleline-git-branch :face feebleline-git-face :pre " - ")
;; (feebleline-project-name :align right)
)
"Fixme -- document me."
:type 'list
:group 'feebleline)
(defcustom feebleline-timer-interval 0.1
"Refresh interval of feebleline mode-line proxy."
:type 'float
:group 'feebleline)
(defcustom feebleline-use-legacy-settings nil
"Hacky settings only applicable to releases older than 25."
:type 'boolean
:group 'feebleline
)
(defvar feebleline--home-dir nil)
(defvar feebleline--msg-timer)
(defvar feebleline--mode-line-format-previous)
(defvar feebleline-last-error-shown nil)
(defface feebleline-git-face '((t :foreground "#444444"))
"Example face for git branch."
:group 'feebleline)
(defface feebleline-dir-face '((t :inherit 'font-lock-variable-name-face))
"Example face for dir face."
:group 'feebleline)
(defun feebleline-linecol-string ()
"Hey guy!"
(format "%4s:%-2s" (format-mode-line "%l") (current-column)))
(defun feebleline-previous-buffer-name ()
"Get name of previous buffer."
(buffer-name (other-buffer (current-buffer) 1)))
(defun feebleline-line-number ()
"Line number as string."
(format "%s" (line-number-at-pos)))
(defun feebleline-column-number ()
"Column number as string."
(format "%s" (current-column)))
(defun feebleline-file-directory ()
"Current directory, if buffer is displaying a file."
(when (buffer-file-name)
(replace-regexp-in-string
(concat "^" feebleline--home-dir) "~"
default-directory)))
(defun feebleline-file-or-buffer-name ()
"Current file, or just buffer name if not a file."
(if (buffer-file-name)
(file-name-nondirectory (buffer-file-name))
(buffer-name)))
(defun feebleline-file-modified-star ()
"Display star if buffer file was modified."
(when (and (buffer-file-name) (buffer-modified-p)) "*"))
(defun feebleline-project-name ()
"Return project name if exists, otherwise nil."
(when (cdr (project-current))
(file-name-nondirectory (directory-file-name (cdr (project-current))))))
(defmacro feebleline-append-msg-function (&rest b)
"Macro for adding B to the feebleline mode-line, at the end."
`(add-to-list 'feebleline-msg-functions ,@b t (lambda (x y) nil)))
(defmacro feebleline-prepend-msg-function (&rest b)
"Macro for adding B to the feebleline mode-line, at the beginning."
`(add-to-list 'feebleline-msg-functions ,@b nil (lambda (x y) nil)))
;; (feebleline-append-msg-function '((lambda () "end") :pre "//"))
;; (feebleline-append-msg-function '(magit-get-current-branch :post "<-- branch lolz"))
;; (feebleline-prepend-msg-function '((lambda () "-") :face hey-i-want-some-new-fae))
(defun feebleline-default-settings-on ()
"Some default settings that works well with feebleline."
(setq window-divider-default-bottom-width 1
window-divider-default-places (quote bottom-only))
(window-divider-mode t)
(setq-default mode-line-format nil)
(walk-windows (lambda (window)
(with-selected-window window
(setq mode-line-format nil)))
nil t))
(defun feebleline-legacy-settings-on ()
"Some default settings for EMACS < 25."
(set-face-attribute 'mode-line nil :height 0.1))
(defun feebleline--insert-ignore-errors ()
"Insert stuff into the echo area, ignoring potential errors."
(unless (current-message)
(condition-case err (feebleline--insert)
(error (unless (equal feebleline-last-error-shown err)
(setq feebleline-last-error-shown err)
(message (format "feebleline error: %s" err)))))))
(defun feebleline--force-insert ()
"Insert stuff into the echo area even if it's displaying something."
(condition-case nil (feebleline--clear-echo-area)
(error nil)))
(defvar feebleline--minibuf " *Minibuf-0*")
(cl-defun feebleline--insert-func (func &key (face 'default) pre (post " ") (fmt "%s") (align 'left))
"Format an element of feebleline-msg-functions based on its properties.
Returns a pair with desired column and string."
(list align
(let* ((msg (apply func nil))
(string (concat pre (format fmt msg) post)))
(if msg
(if face
(propertize string 'face face)
string)
""))))
(defun feebleline--insert ()
"Insert stuff into the mini buffer."
(unless (current-message)
(let ((left ())
(right ()))
(dolist (idx feebleline-msg-functions)
(let* ((fragment (apply 'feebleline--insert-func idx))
(align (car fragment))
(string (cadr fragment)))
(push string (symbol-value align))))
(with-current-buffer feebleline--minibuf
(erase-buffer)
(let* ((left-string (string-join (reverse left)))
(message-truncate-lines t)
(max-mini-window-height 1)
(right-string (string-join (reverse right)))
(free-space (- (frame-width) (length left-string) (length right-string)))
(padding (make-string (max 0 free-space) ?\ )))
(insert (concat left-string (if right-string (concat padding right-string)))))))))
(defun feebleline--clear-echo-area ()
"Erase echo area."
(with-current-buffer feebleline--minibuf
(erase-buffer)))
;;;###autoload
(define-minor-mode feebleline-mode
"Replace modeline with a slimmer proxy."
:require 'feebleline
:global t
(if feebleline-mode
;; Activation:
(progn
(setq feebleline--home-dir (expand-file-name "~"))
(setq feebleline--mode-line-format-previous mode-line-format)
(setq feebleline--msg-timer
(run-with-timer 0 feebleline-timer-interval
'feebleline--insert-ignore-errors))
(if feebleline-use-legacy-settings (feebleline-legacy-settings-on)
(feebleline-default-settings-on))
(add-hook 'focus-in-hook 'feebleline--insert-ignore-errors))
;; Deactivation:
(set-face-attribute 'mode-line nil :height 1.0)
(setq-default mode-line-format feebleline--mode-line-format-previous)
(walk-windows (lambda (window)
(with-selected-window window
(setq mode-line-format feebleline--mode-line-format-previous)))
nil t)
(cancel-timer feebleline--msg-timer)
(remove-hook 'focus-in-hook 'feebleline--insert-ignore-errors)
(force-mode-line-update)
(redraw-display)
(feebleline--clear-echo-area)))
(provide 'feebleline)
;;; feebleline.el ends here
|
