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;;; zen-mode.el --- Zen Editing Mode
;; Copyright (C) 2017 Akilan Elango
;; Author: Akilan Elango <akilan1997 [at] gmail.com>
;; Keywords: convenience
;; Package-Version: 20170723.139
;; X-URL: https://github.com/aki237/zen-mode
;; URL: https://github.com/aki237/zen-mode
;; Version: 0.0.1
;; Package-Requires: ((emacs "24.3"))
;; 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:
;; Zen mode for Emacs is a distraction free editing mode for Emacs.
;;
;;; Installation:
;;
;; (require 'zen-mode)
;;
;;; Use:
;; This is used to start a distraction free editing session in Emacs like in
;; Sublime Text.
;;
;;; Code:
;; require
;; variables
(defvar zen-mode-disable-mode-line t
"Zen mode option to hide the mode line. Set true to hide the mode line in Zen-mode.")
;; local variables
(defvar-local zen-run-mode nil
"zen-run-mode variable is to set state of whether zen mode is enabled in the current buffer"
)
(defvar-local zen-mode-margin-width (/ (/ (display-pixel-width) (/ (window-pixel-width) (window-width))) 5)
"Zen mode option to specify the margin width."
)
(defvar-local zen-mode-line-cache nil
"zen-mode-line-cache variable is used to save the modeline format content for future when it is disabled"
)
(defvar-local zen-menubar-state nil
"zen-menubar-state variable is used to save whether menu-bar-mode is enabled before entering the zen mode"
)
(defvar-local zen-toolbar-state nil
"zen-toolbar-state variable is used to save whether tool-bar-mode is enabled before entering the zen mode"
)
(defvar-local zen-linum-state nil
"zen-linum-state variable is used to save whether linum-mode is enabled before entering the zen mode"
)
(defvar-local zen-blink-cursor-state nil
"zen-blink-cursor-state variable is used to save whether blink-cursor-mode is enabled before entering the zen mode"
)
(defvar-local zen-lm-state 0
"zm-lm-state variable is used to store the left margin width before the activation of zen-mode"
)
(defvar-local zen-rm-state 0
"zm-rm-state variable is used to store the right margin width before the activation of zen-mode"
)
(defvar-local zen-lf-state 0
"zm-lf-state variable is used to store the left fringe width before the activation of zen-mode"
)
(defvar-local zen-rf-state 0
"zm-rf-state variable is used to store the right fringe width before the activation of zen-mode"
)
(defvar-local zen-fullscreen-state nil
"zm-fullscreen-state variable is used to store fullscreen state before the activation of zen-mode"
)
;;;###autoload
(define-minor-mode zen-mode
"zen-mode is a distraction free editing mode for Emacs"
:lighter " Zen"
:keymap (let ((map (make-sparse-keymap)))
(define-key map (kbd "C-c C-<") 'zen-mode-increase-margin-width)
(define-key map (kbd "C-c C->") 'zen-mode-decrease-margin-width)
map)
(zen-run)
)
;; functions
(defun zen-run()
"zen-run is a lisp function which activates and deactivates the zen-mode"
(if zen-run-mode
(progn
(message "Distraction free disabled")
(setq window-size-change-functions (remove 'zen-mode-refresh-buffer 'window-size-change-functions))
(if zen-linum-state
(linum-mode 1))
(if zen-blink-cursor-state
(blink-cursor-mode 1))
(if zen-mode-disable-mode-line
(progn
(setq mode-line-format zen-mode-line-cache)))
(if zen-toolbar-state
(tool-bar-mode 1))
(if zen-menubar-state
(menu-bar-mode 1))
(setq left-fringe-width zen-lf-state)
(setq right-fringe-width zen-rf-state)
(setq left-margin-width zen-lm-state)
(setq right-margin-width zen-rm-state)
(set-frame-parameter nil 'fullscreen 'zen-fullscreen-state)
(set-window-buffer nil (current-buffer))
(setq zen-run-mode nil))
(progn
(if zen-mode-disable-mode-line
(progn
(setq zen-mode-line-cache mode-line-format)
(setq mode-line-format nil)))
(setq zen-menubar-state (and (boundp 'menu-bar-mode) menu-bar-mode))
(setq zen-toolbar-state (and (boundp 'tool-bar-mode) tool-bar-mode))
(setq zen-linum-state (and (boundp 'linum-mode) linum-mode))
(setq zen-blink-cursor-state (and (boundp 'blink-cursor-mode) blink-cursor-mode))
(setq zen-lm-state left-margin-width)
(setq zen-rm-state right-margin-width)
(setq zen-lf-state left-fringe-width)
(setq zen-rf-state right-fringe-width)
(setq zen-fullscreen-state (frame-parameter (selected-frame) 'fullscreen))
(message "Distraction free enabled")
(add-to-list 'window-size-change-functions 'zen-mode-refresh-buffer)
(set-frame-parameter nil 'fullscreen 'fullboth)
(linum-mode -1)
(setq right-fringe-width 0)
(setq left-fringe-width 0)
(menu-bar-mode -1)
(tool-bar-mode -1)
(blink-cursor-mode -1)
(zen-mode-set-margins)
(setq zen-run-mode t))))
(defun zen-mode-increase-margin-width()
"zen-mode-increase-margin-width is a interactive lisp function to increase the margin width in zen-mode (by 5 units)."
(interactive)
(setq zen-mode-margin-width (+ zen-mode-margin-width 5))
(zen-mode-set-margins)
)
(defun zen-mode-decrease-margin-width()
"zen-mode-increase-margin-width is a interactive lisp function to increase the margin width in zen-mode (by 5 units)."
(interactive)
(setq zen-mode-margin-width (+ zen-mode-margin-width -5))
(zen-mode-set-margins)
)
(defun zen-mode-set-margins()
"zen-mode-set-margins is a lisp function to set the margin width (both left and right)."
(setq left-margin-width zen-mode-margin-width)
(setq right-margin-width zen-mode-margin-width)
(set-window-buffer nil (current-buffer))
)
(defun zen-mode-refresh-buffer(frame)
"zen-mode-refresh-buffer is a lisp function to refresh the buffer's margin width when window is resized"
(setq zen-mode-margin-width (/ (/ (display-pixel-width) (/ (window-pixel-width) (window-width))) 5))
(zen-mode-set-margins)
)
(provide 'zen-mode)
;; coding: utf-8
;; End:
;;; zen-mode.el ends here
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