#+TITLE: Emacs configure
#+AUTHOR: Tuan-Dat Tran
#+DATE: <2018-01-11 Do>
#+EMAIL: tran.tuan-dat@mailbox.org
#+OPTIONS: ':nil *:t -:t ::t <:t H:3 \n:nil ^:t arch:headline
#+OPTIONS: author:t c:nil creator:comment d:(not "LOGBOOK") date:t
#+OPTIONS: e:t email:nil f:t inline:t num:t p:nil pri:nil stat:t
#+OPTIONS: tags:t tasks:t tex:t timestamp:t toc:t todo:t |:t
#+KEYWORDS:
#+LANGUAGE: en
#+SELECT_TAGS: export

* Packages
A list of installed packages and details about them.
** Package Archives
   Adding the melpa package repository to Emacs.
#+BEGIN_SRC emacs-lisp
(require 'package)
(add-to-list 'package-archives
    '("melpa" . "http://melpa.org/packages/"))
(package-initialize)
#+END_SRC
** Installed packages:
   A require for all my installed packages, so that they are automatically installed
   in case I want to setup my emacs on another pc he same way as always
#+BEGIN_SRC emacs-lisp
(unless (package-installed-p 'use-package)
  (package-refresh-contents)
  (package-install 'use-package))

(require 'use-package)
(setq use-package-always-ensure t)

(use-package anaconda-mode)
(use-package auctex
:defer t
:ensure t)
(use-package auto-complete)
(use-package auto-complete-auctex
:defer t
:ensure t)
(use-package counsel)
(use-package flycheck)
(use-package ivy)
(use-package ledger-mode)
(use-package molokai-theme)
(use-package ox-gfm)
(use-package ox-twbs)
(use-package php-mode)
(use-package powerline)
(use-package rainbow-delimiters)
(use-package rainbow-mode)
(use-package smart-compile)
(use-package smartparens)
(use-package swiper)
(use-package visual-regexp)
#+END_SRC
* Appearance
  Using the Molokai-Theme.
#+BEGIN_SRC emacs-lisp
(load-theme 'molokai t)
#+END_SRC

Changes the Emacs background to the terminals defaults. (Generally)
#+BEGIN_SRC emacs-lisp
(add-hook 'window-setup-hook
      '(lambda ()
         (set-face-background 'default "unspecified-bg")))
#+END_SRC

Remove menubar
#+BEGIN_SRC emacs-lisp
(menu-bar-mode -1)
#+END_SRC

Powerline for Emacs
#+BEGIN_SRC emacs-lisp
(powerline-center-theme)
#+END_SRC

* Emacs behavior
  Save auto-save files in ~/.emacs-save
#+BEGIN_SRC emacs-lisp
(f-mkdir "~/.emacs-saves")
(setq backup-directory-alist
  '((".*" . "~/.emacs-saves/")))
(setq auto-save-file-name-transforms
  '((".*" "~/.emacs-saves/" t)))
(setq custom-file "~/.emacs.d/config.el")
(setq auto-mode-alist (append '(("/tmp/mutt.*" . mail-mode)) auto-mode-alist))
#+END_SRC

Delete trailing spaces before saving
#+BEGIN_SRC emacs-lisp
(add-hook 'before-save-hook 'delete-trailing-whitespace)
#+END_SRC

* Functions
  All the functions I use.
** Cut/Copy and Paste by Boruch Baum
A nice way to copy and paste contents comfortably inside and out of emacs.
*** Copy
Copy the marked area to the clipboard.
#+BEGIN_SRC emacs-lisp
(defun copy-to-xclipboard(arg)
  (interactive "P")
  (cond
   ((not (use-region-p))
    (message "Nothing to yank to X-clipboard"))
   ((and (not (display-graphic-p))
	 (/= 0 (shell-command-on-region
		(region-beginning) (region-end) "xsel -i -b")))
    (error "Is program `xsel' installed?"))
   (t
    (when (display-graphic-p)
      (call-interactively 'clipboard-kill-ring-save))
    (message "Yanked region to X-clipboard")
    (deactivate-mark))))
#+END_SRC

*** Cut
Cut the marked area to the clipboard.
#+BEGIN_SRC emacs-lisp
(defun cut-to-xclipboard(arg)
  (interactive "P")
  (cond
   ((not (use-region-p))
    (message "Nothing to yank to X-clipboard"))
   ((and (not (display-graphic-p))
	 (/= 0 (shell-command-on-region
		(region-beginning) (region-end) "xsel -i -b")))
    (error "Is program `xsel' installed?"))
   (t
    (when (display-graphic-p)
    (call-interactively 'clipboard-kill-ring-save))
    (message "Yanked region to X-clipboard")
    (kill-region  (region-beginning) (region-end))
    (deactivate-mark))))
#+END_SRC

*** Paste
Paste from the clipboard.
#+BEGIN_SRC emacs-lisp
(defun paste-from-xclipboard()
  "Uses shell command `xsel -o' to paste from x-clipboard. With
    one prefix arg, pastes from X-PRIMARY, and with two prefix args,
    pastes from X-SECONDARY."
  (interactive)
  (if (display-graphic-p)
      (clipboard-yank)
    (let*
	((opt (prefix-numeric-value current-prefix-arg))
	 (opt (cond
	       ((=  1 opt) "b")
	       ((=  4 opt) "p")
	       ((= 16 opt) "s"))))
      (insert (shell-command-to-string (concat "xsel -o -" opt))))))
#+END_SRC

** Personal functions
Go back to indentation, if you are at the indentation, go to beginning of the line instead.
#+BEGIN_SRC emacs-lisp
  (defun back-to-indentation-or-beginning ()
  "Go back to indentation, if at indentation go to beginning of line"
  (interactive)
   (if (= (point) (progn (back-to-indentation) (point)))
       (beginning-of-line)))
#+END_SRC

Sets the background of Emacs in terminal-mode to the terminals. Doesn't change it in window
mode though.
Function is not currently used since I still have to figure out how to make it work with emacs in daemon mode
#+BEGIN_SRC emacs-lisp
(defun transparent-terminal ()
  (unless (display-graphic-p (selected-frame))
    (set-face-background 'default "unspecified-bg" (selected-frame))))
#+END_SRC

Copy word
#+BEGIN_SRC emacs-lisp
(defun copy-word (&optinal arg)
"Copy words at point into kill-ring"
(interactive "P")
(copy-thing 'backward-word 'forward-word arg)
)
#+END_SRC

#+BEGIN_SRC emacs-lisp
(defun insert-current-date () (interactive)
 (insert (shell-command-to-string "echo -n $(date +%d.%m.%Y)")))
#+END_SRC

#+BEGIN_SRC emacs-lisp
(defun insert-current-time () (interactive)
 (insert (shell-command-to-string "echo -n $(date +%H:%M)")))
#+END_SRC

* Modes
** Window Modes
** Autocomplete
#+BEGIN_SRC emacs-lisp
(ac-config-default)

#+END_SRC
** Python
Using Anaconda-mode as default python development mode
#+BEGIN_SRC emacs-lisp
(add-hook 'python-mode-hook 'anaconda-mode)
(add-hook 'python-mode-hook 'anaconda-eldoc-mode)
#+END_SRC
** Java
#+BEGIN_SRC emacs-lisp
(add-hook
  'java-mode-hook
    (lambda()
      (local-set-key (kbd "C-c C-c") #'smart-compile)
      (local-set-key (kbd "C-c /") #'comment-region)))
#+END_SRC

** C++
My exec doesnt quite work yet.
#+BEGIN_SRC emacs-lisp
;;(defun my-exec ()
;;  (interactive)
;;  (let ((exe (smart-compile-string "%n")))
;;    (with-current-buffer "*eshell*"
;;      (goto-char (point-max))
;;      (insert "./")
;;      (insert exe)
;;      (eshell-send-input))
;;    (switch-to-buffer-other-window "*eshell*")))
(add-hook
  'c++-mode-hook
    (lambda()
      (local-set-key (kbd "C-c C-c") #'smart-compile)
      (local-set-key (kbd "C-c /") #'comment-region)))
#+END_SRC

** NASM
#+BEGIN_SRC emacs-lisp
(add-to-list 'auto-mode-alist '("\\.\\(asm\\|s\\)$" . nasm-mode))
#+END_SRC

** LaTeX
Some default settings for LaTeX-Mode.
AucTeX is needed.
#+BEGIN_SRC emacs-lisp
(setq TeX-auto-save t)
(setq TeX-parse-self t)
(setq-default TeX-master nil)
#+END_SRC
** Org
Use Evince as default pdf viewer.
#+BEGIN_SRC emacs-lisp
(add-hook 'org-mode-hook
      '(lambda ()
         (delete '("\\.pdf\\'" . default) org-file-apps)
         (add-to-list 'org-file-apps '("\\.pdf\\'" . "evince %s"))))
#+END_SRC

Enable syntax highlighting in Org-mode.
#+BEGIN_SRC emacs-lisp
(add-hook 'org-mode-hook
      '(lambda ()
         (setq org-src-fontify-natively t)))
#+END_SRC

Enable
Enable automatic translation of special characters
#+BEGIN_SRC emacs-lisp
(add-hook 'org-mode-hook
      '(lambda ()
         (setq org-pretty-entities t)))
#+END_SRC

Add rainbow-delimiters in org-mode
#+BEGIN_SRC emacs-lisp
(add-hook 'org-mode-hook 'rainbow-delimiters-mode)
#+END_SRC

Handy shortcuts
#+BEGIN_SRC emacs-lisp
(define-key global-map "\C-ca" 'org-agenda)
(define-key global-map "\C-cl" 'org-store-link)
(setq org-log-done t)
#+END_SRC

GNU Plot
#+BEGIN_SRC emacs-lisp
(add-hook 'org-mode-hook
      '(lambda ()
         (local-set-key (kbd "C-c c") #'org-plot/gnuplot)))
#+END_SRC

Enabled languages:
#+BEGIN_SRC emacs-lisp
(org-babel-do-load-languages
'org-babel-load-languages
'( (python . t)
   (emacs-lisp . t)
   (C . t)
   (gnuplot . t)
   (latex . t)
   (shell . t)
 ))
#+END_SRC

** Ivy/Counsel/Swiper
#+BEGIN_SRC emacs-lisp
(counsel-mode 1)
(global-set-key "\C-s" 'swiper)
#+END_SRC
** Parenthesis
#+BEGIN_SRC emacs-lisp
;; (require 'paren)
(setq show-paren-style 'parenthesis)
(show-paren-mode 1)
#+END_SRC
** Highlight line
Globaly highlight the current line in a slightly darker shade of grey.
#+BEGIN_SRC emacs-lisp
(global-hl-line-mode 1)
(set-face-background 'hl-line "#141b1e")
(set-face-foreground 'highlight nil)
#+END_SRC
** Yasnippet
#+BEGIN_SRC emacs-lisp
;; (require 'yasnippet)
(setq yas-snippet-dirs
  '("~/.emacs.d/snippets/"))
(yas-global-mode 1)
#+END_SRC

** Ledger
#+BEGIN_SRC emacs-lisp
(org-babel-load-file "~/.emacs.d/ledger.org")
#+END_SRC
** Personal Global
#+BEGIN_SRC emacs-lisp
(defvar my-keys-minor-mode-map
  (let ((map (make-sparse-keymap)))
    (define-key map (kbd "C-a") 'back-to-indentation-or-beginning)
    (define-key map (kbd "C-c M-w") 'copy-to-xclipboard)
    (define-key map (kbd "C-c C-w") 'cut-to-xclipboard)
    (define-key map (kbd "C-c M-y") 'paste-from-xclipboard)
    (define-key map (kbd "C-c w") 'copy-word)
    (define-key map (kbd "C-c r") 'vr/query-replace)
    (define-key map (kbd "M-/") 'comment-region)
    (define-key map (kbd "C-c d") 'insert-current-date)
    (define-key map (kbd "C-c t") 'insert-current-time)
    map)
  "my-keys-minor-mode keymap.")

(define-minor-mode my-keys-minor-mode
  "A minor mode so that my key settings override annoying major modes."
  :init-value t
  :lighter " my-keys")

(my-keys-minor-mode 1)
#+END_SRC

** Conf
#+BEGIN_SRC emacs-lisp
(add-hook 'conf-mode 'rainbow-mode)
#+END_SRC