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emacs-home.el
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;;; emacs-home.el --- A home-screen for Emacs -*- lexical-binding: t; -*-
;; This file is not part of Emacs
;; Author: Mohammed Ismail Ansari <team.terminal@gmail.com>
;; Version: 1.0
;; Keywords: convenience, shortcuts
;; Maintainer: Mohammed Ismail Ansari <team.terminal@gmail.com>
;; Created: 2017/06/24
;; Package-Requires: ((emacs "24") (cl-lib "0.5"))
;; Description: A home-screen for Emacs
;; URL: http://ismail.teamfluxion.com
;; Compatibility: Emacs24
;; COPYRIGHT NOTICE
;;
;; 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 2 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.
;;
;;; Install:
;; Put this file on your Emacs-Lisp load path and add the following to your
;; ~/.emacs startup file
;;
;; (require 'emacs-home)
;;
;; Currently *emacs-home* supports the following widgets:
;;
;; 1. Date and Time
;; 2. Work-day progress
;; 3. Favorite files
;; 4. Favorite functions
;;
;; Set a key-binding to open the configuration menu that displays all configured
;; configurations.
;;
;; (global-set-key (kbd "C-;") 'emacs-home-show)
;;
;; By default, only the date-time widget is shown. One needs to set a few
;; variables to see the rest of the widgets.
;;
;; To see the work-day progress widget, set the day start and end times. These
;; need to be set with numeric values in the format *hhmm*. Refer to the below
;; example.
;;
;; (emacs-home-set-day-start-time 0800)
;; (emacs-home-set-day-end-time 1700)
;;
;; If the current time is between the above two times, a progress bar is shown.
;;
;; To see the favorite files widget, use a snippet as shown below.
;;
;; (emacs-home-set-favorite-files (list '("t" "~/to-do.org")
;; '("i" "~/Documents/work.md")))
;;
;; To see the favorite functions widget, use a snippet as shown below.
;;
;; (emacs-home-set-favorite-functions (list '("s" snake)
;; '("c" calc)))
;;
;; While on the home screen, pressing `g` updates it and `q` closes it.
;;
;;; Commentary:
;; You can use *emacs-home* as a home-screen to place shortcuts and view
;; useful information about your day.
;;
;; Overview of features:
;;
;; o Quickly open up a screen with useful information and shortcuts
;;
;;; Code:
(require 'cl-lib)
(defvar emacs-home--buffer-name
" *emacs-home*")
(defvar emacs-home--refresh-timer
nil)
(defvar emacs-home--data-day-start-time
nil)
(defvar emacs-home--data-day-end-time
nil)
(defvar emacs-home--data-favorite-files
nil)
(defvar emacs-home--data-favorite-functions
nil)
;;;###autoload
(defun emacs-home-set-day-start-time (time)
(setq emacs-home--data-day-start-time
time))
;;;###autoload
(defun emacs-home-set-day-end-time (time)
(setq emacs-home--data-day-end-time
time))
;;;###autoload
(defun emacs-home-set-favorite-files (files)
(setq emacs-home--data-favorite-files
files))
;;;###autoload
(defun emacs-home-set-favorite-functions (functions)
(setq emacs-home--data-favorite-functions
functions))
;;;###autoload
(defun emacs-home-show ()
"Shows emacs home."
(interactive)
(cl-flet* ((print-date-and-time ()
(insert (concat (propertize (format-time-string "%A, %d %B %Y")
'face
'(:height 2.0))
"\n\n"))
(insert (concat (propertize (format-time-string "%H:%M:%S")
'face
'(:height 4.0 :inverse-video t))
"\n\n")))
(get-day-progress ()
(let ((start-minutes (+ (* 60
(truncate (/ emacs-home--data-day-start-time
100)))
(mod emacs-home--data-day-start-time
100)))
(end-minutes (+ (* 60
(truncate (/ emacs-home--data-day-end-time
100)))
(mod emacs-home--data-day-end-time
100)))
(ellapsed-minutes (+ (* 60
(string-to-number (format-time-string "%H")))
(string-to-number (format-time-string "%M")))))
(cond ((and (> end-minutes
start-minutes)
(>= ellapsed-minutes
start-minutes)
(<= ellapsed-minutes
end-minutes)) (/ (* (- ellapsed-minutes
start-minutes)
1.0)
(- end-minutes
start-minutes)))
(t nil))))
(print-day-progress ()
(cond ((not (or (null emacs-home--data-day-start-time)
(null emacs-home--data-day-end-time)))
(let ((day-progress-ratio (get-day-progress)))
(insert (concat (make-string (window-width)
?*)
"\n"))
(insert (concat (propertize (cond ((not (null day-progress-ratio))
(make-string (truncate (* (window-width)
day-progress-ratio))
?*))
(t "Outside working hours"))
'face
'(:inverse-video t))
"\n"))
(insert (concat (make-string (window-width)
?*)
"\n"))))))
(get-displayable-symbol (item)
(cond ((symbolp item) (symbol-name item))
(t item)))
(display-controls-binding (object)
(insert (concat (propertize (concat " "
(nth 0
object)
" ")
'face
'(:height 1.5 :box t))
" "
(propertize (get-displayable-symbol (cadr object))
'face
'(:height 1.5))
"\n")))
(print-favorite-files ()
(cond ((not (null emacs-home--data-favorite-files))
(progn
(insert (concat "\n"
(propertize "Favorite files:" 'face '(:height 2.0 :underline t))
"\n\n"))
(mapc #'display-controls-binding
emacs-home--data-favorite-files)))))
(print-favorite-functions ()
(cond ((not (null emacs-home--data-favorite-functions))
(progn
(insert (concat "\n"
(propertize "Favorite functions:" 'face '(:height 2.0 :underline t))
"\n\n"))
(mapc #'display-controls-binding
emacs-home--data-favorite-functions)))))
(apply-other-commands-bindings ()
(local-set-key (kbd "g")
'home-redraw)
(local-set-key (kbd "q")
(lambda ()
(interactive)
(home-hide))))
(apply-favorite-file-binding (object)
(local-set-key (kbd (car object))
(lambda ()
(interactive)
(home-hide)
(find-file (cadr object)))))
(apply-favorite-files-bindings ()
(mapc (lambda (object)
(funcall #'apply-favorite-file-binding
object))
emacs-home--data-favorite-files))
(apply-favorite-function-binding (object)
(local-set-key (kbd (car object))
(lambda ()
(interactive)
(home-hide)
(funcall (cadr object)))))
(apply-favorite-functions-bindings ()
(mapc (lambda (object)
(funcall #'apply-favorite-function-binding
object))
emacs-home--data-favorite-functions))
(render-controls ()
(with-current-buffer (get-buffer-create emacs-home--buffer-name)
(print-date-and-time)
(print-day-progress)
(print-favorite-files)
(print-favorite-functions)
(emacs-home-mode)
(apply-other-commands-bindings)
(apply-favorite-files-bindings)
(apply-favorite-functions-bindings)))
(stop-timer ()
(cancel-timer emacs-home--refresh-timer))
(home-hide ()
(let ((my-window (get-buffer-window (get-buffer-create emacs-home--buffer-name))))
(stop-timer)
(cond ((windowp my-window)
(kill-buffer (get-buffer-create emacs-home--buffer-name))))))
(home-redraw ()
(interactive)
(cond ((get-buffer emacs-home--buffer-name)
(progn (with-current-buffer (get-buffer-create emacs-home--buffer-name)
(fundamental-mode)
(read-only-mode -1)
(erase-buffer))
(render-controls)))
(t (stop-timer)))))
(cond ((get-buffer emacs-home--buffer-name) (home-hide))
(t (let ((my-buffer (get-buffer-create emacs-home--buffer-name)))
(set-window-buffer (get-buffer-window)
my-buffer)
(render-controls)
(setq emacs-home--refresh-timer
(run-with-timer 1
1
#'home-redraw)))))))
(define-derived-mode emacs-home-mode
special-mode
"emacs-home"
:abbrev-table nil
:syntax-table nil
(setq cursor-type nil))
(provide 'emacs-home)
;;; emacs-home.el ends here