;;; oni-core.el --- Core Emacs configuration         -*- lexical-binding: t; -*-

;; Copyright (C) 2019  Tom Willemse

;; Author: Tom Willemse <tom@ryuslash.org>
;; Keywords: local
;; Version: 2021.0701.142845
;; Package-Requires: (oni-data-dir oni-embrace oni-hydra expand-region multiple-cursors gcmh diminish ws-butler which-key insert-char-preview dashboard)

;; 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 <https://www.gnu.org/licenses/>.

;;; Commentary:

;; Core Emacs configuration, doesn't need any requires from within
;; Emacs. These settings don't seem to go anywhere else.

;;; Code:

(require 'diminish)
(require 'gcmh)
(require 'hydra)
(require 'oni-data-dir)
(require 'recentf)
(require 'which-key)
(require 'ws-butler)
(require 'auth-source)

(defconst oni-core--auto-save-directory (oni-data-dir-locate "auto-save-files/")
  "Directory where auto-saves go.")

(defalias 'yes-or-no-p 'y-or-n-p)

(defvar oni-core--recentf-idle-timer nil
  "Internal variable keeping track of a timer started for ‘recentf-save-list’.")

(defun oni-core--switch-newline-keys ()
  "Switch the ‘C-j’ and ‘RET’ keys in the local buffer."
  (if electric-indent-mode
      (progn
        (local-set-key (kbd "C-j") 'newline)
        (local-set-key (kbd "RET") 'electric-newline-and-maybe-indent))
    (local-unset-key (kbd "C-j"))
    (local-unset-key (kbd "RET"))))

(defun oni-core--ensure-autosave-directory-exists ()
  "Create the autosave directory if doesn't exist."
  (mkdir oni-core--auto-save-directory t))

(defun oni-core-move-beginning-of-dwim ()
  "Move to beginning of line either after indentation or before."
  (interactive)
  (let ((start (point)))
    (back-to-indentation)
    (unless (/= start (point))
      (move-beginning-of-line 1))))

(defun oni-core-move-end-of-dwim ()
  "Move to end of line, either before any comments or after."
  (interactive)
  (let ((start (point))
        (eolpos (line-end-position)))
    (beginning-of-line)
    (if (and comment-start
             (not (looking-at (regexp-quote comment-start)))
             (comment-search-forward eolpos t))
        (progn
          (search-backward-regexp (concat "[^ \t" comment-start "]"))
          (forward-char)
          (when (or (bolp)
                    (= start (point)))
            (end-of-line)))
      (end-of-line))))

;;; From Bastien Guerry’s Emacs configuraiton:
;;; https://github.com/bzg/dotemacs/blob/master/emacs.org
(defun oni-core-unfill-paragraph ()
  "Make a multi-line paragraph into a single line of text."
  (interactive)
  (let ((fill-column (point-max)))
    (fill-paragraph nil)))

(defun oni-core-recentf-save-list-silently ()
  "Call ‘recentf-save-list’ but without showing a message about it."
  (let ((inhibit-message t))
    (recentf-save-list)))

(defhydra oni-sort-and-align-hydra (:color teal :hint nil)
  "
     ^Sort^
^^--------------
_l_: Lines
_p_: Paragraph
_s_: String list"
  ("l" sort-lines)
  ("p" (save-excursion
         (sort-lines
          nil
          (progn (start-of-paragraph-text) (point))
          (progn (end-of-paragraph-text) (point)))))
  ("s" (sort-regexp-fields
        nil
        (rx "\"" (one-or-more (not "\"")) "\"")
        (rx (one-or-more (not "\"")))
        (region-beginning)
        (region-end))))

(add-to-list 'auto-save-file-name-transforms
	         `(".*" ,oni-core--auto-save-directory t)
	         :append)

(setq backup-directory-alist
      `((".*" . ,(oni-data-dir-locate "backup-files"))))

(setq auto-save-list-file-prefix
      (oni-data-dir-locate "auto-save-list/.saves-"))

(setq abbrev-file-name (oni-data-dir-locate "abbrev_defs"))

(setq recentf-save-file (oni-data-dir-locate "recentf"))

;;; Get rid of the default help tooltip on the mode-line.
(setq mode-line-default-help-echo nil)

(setq user-full-name "Tom Willemse"
      user-mail-address "tom@ryuslash.org")

(setq delete-old-versions t)
(setq kept-new-versions 20)
(setq kept-old-versions 20)
(setq vc-make-backup-files t)
(setq version-control t)
(setq require-final-newline t)
(setq sentence-end-double-space nil)
(setq inhibit-startup-screen t)
(setq electric-pair-skip-whitespace 'chomp)
(setq fit-window-to-buffer-horizontally t)

(require 'dashboard)
(dashboard-setup-startup-hook)
(setq initial-buffer-choice (lambda () (get-buffer-create "*dashboard*")))

;; Increase the threshold for garbage collection for increased performance.
;; Apparently there are some (lsp-mode for example) packages that generate a lot
;; of garbage.
(setq gc-cons-threshold 100000000)

;;; Remove ~/.authinfo from the auth sources since it’s an unencripted file and
;;; I don’t want to accidentally store anything in there.
(setq auth-sources
      (cons "secrets:Login"
            (remove "~/.netrc"
                    (remove "~/.authinfo" auth-sources))))

(setq read-mail-command 'gnus)

(setq-default indent-tabs-mode nil)
(setq-default tab-width 4)
(setq-default truncate-lines t)
(setq-default fill-column 80)

(add-hook 'before-save-hook 'time-stamp)
(add-hook 'electric-indent-local-mode-hook #'oni-core--switch-newline-keys)
(add-hook 'minibuffer-setup-hook 'electric-pair-local-mode)
(add-hook 'prog-mode-hook 'goto-address-prog-mode)
(add-hook 'auto-save-hook #'oni-core--ensure-autosave-directory-exists)
(add-hook 'after-save-hook 'executable-make-buffer-file-executable-if-script-p)

(global-set-key (kbd "C-M-SPC") 'er/expand-region)
(global-set-key (kbd "C-S-b") 'windmove-left)
(global-set-key (kbd "C-S-f") 'windmove-right)
(global-set-key (kbd "C-S-n") 'windmove-down)
(global-set-key (kbd "C-S-p") 'windmove-up)
(global-set-key (kbd "C-c (") 'embrace-commander)
(global-set-key (kbd "C-c q") #'oni-core-unfill-paragraph)
(global-set-key (kbd "C-c s") #'oni-sort-and-align-hydra/body)
(global-set-key (kbd "C-x C-b") 'ibuffer-jump)
(global-set-key (kbd "C-x M-f") 'ffap)
(global-set-key (kbd "M-+") 'mc/mark-next-like-this)
(global-set-key [remap insert-char] 'insert-char-preview)
(global-set-key [remap move-beginning-of-line] #'oni-core-move-beginning-of-dwim)
(global-set-key [remap move-end-of-line] #'oni-core-move-end-of-dwim)

(global-set-key (kbd "C-<left>") 'winner-undo)
(global-set-key (kbd "C-<right>") 'winner-redo)

(unless oni-core--recentf-idle-timer
  (setq oni-core--recentf-idle-timer
        (run-with-idle-timer 10 t #'oni-core-recentf-save-list-silently)))

(with-eval-after-load 'gcmh (diminish 'gcmh-mode))
(with-eval-after-load 'ws-butler (diminish 'ws-butler-mode))
(with-eval-after-load 'which-key (diminish 'which-key-mode))

(electric-indent-mode -1)
(winner-mode)
(recentf-mode)
(gcmh-mode)
(ws-butler-global-mode)
(which-key-mode)
(auto-insert-mode)

(add-to-list 'display-buffer-alist
             `(,(rx string-start
                    "*" (any ?h ?H) "elp")
               display-buffer-in-side-window
               (side . bottom)
               (slot . 0)
               (window-height . 0.33)))

(when (eql system-type 'windows-nt)
  (add-to-list 'load-path (locate-user-emacs-file "vendor/p4-vc"))
  (add-to-list 'exec-path "c:/Program Files/Git/bin")
  (add-to-list 'exec-path "C:/Program Files/Git/usr/bin")
  (add-to-list 'exec-path "c:/cygwin64/bin")

  (setq delete-by-moving-to-trash t)

  (setq-default buffer-file-coding-system 'utf-8-unix))

(provide 'oni-core)
;;; oni-core.el ends here