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;;; prelude-editor.el --- Emacs Prelude: enhanced core editing experience.
;; Copyright (c) 2011-2012 Bozhidar Batsov
;; Author: Bozhidar Batsov <>
;; URL:
;; Version: 1.0.0
;; Keywords: convenience
;; This file is not part of GNU Emacs.
;;; Commentary:
;; Refinements of the core editing experience in Emacs.
;;; License:
;; 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
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Code:
;; customize
(defgroup editor nil
"Emacs Prelude Editor enhancements"
:group 'prelude)
;; Death to the tabs! However, tabs historically indent to the next
;; 8-character offset; specifying anything else will cause *mass*
;; confusion, as it will change the appearance of every existing file.
;; In some cases (python), even worse -- it will change the semantics
;; (meaning) of the program.
;; Emacs modes typically provide a standard means to change the
;; indentation width -- eg. c-basic-offset: use that to adjust your
;; personal indentation width, while maintaining the style (and
;; meaning) of any files you load.
(setq-default indent-tabs-mode nil) ;; don't use tabs to indent
(setq-default tab-width 8) ;; but maintain correct appearance
;; delete the selection with a keypress
(delete-selection-mode t)
;; store all backup and autosave files in the tmp dir
(setq backup-directory-alist
`((".*" . ,temporary-file-directory)))
(setq auto-save-file-name-transforms
`((".*" ,temporary-file-directory t)))
;; revert buffers automatically when underlying files are changed externally
(global-auto-revert-mode t)
;; hippie expand is dabbrev expand on steroids
(setq hippie-expand-try-functions-list '(try-expand-dabbrev
;; smart pairing for all
(electric-pair-mode t)
;; meaningful names for buffers with the same name
(require 'uniquify)
(setq uniquify-buffer-name-style 'forward)
(setq uniquify-separator "/")
(setq uniquify-after-kill-buffer-p t) ; rename after killing uniquified
(setq uniquify-ignore-buffers-re "^\\*") ; don't muck with special buffers
;; saveplace remembers your location in a file when saving files
(setq save-place-file (concat prelude-savefile-dir "saveplace"))
;; activate it for all buffers
(setq-default save-place t)
(require 'saveplace)
;; savehist keeps track of some history
(setq savehist-additional-variables
;; search entries
'(search ring regexp-search-ring)
;; save every minute
savehist-autosave-interval 60
;; keep the home clean
savehist-file (concat prelude-savefile-dir "savehist"))
(savehist-mode t)
;; save recent files
(setq recentf-save-file (concat prelude-savefile-dir "recentf")
recentf-max-saved-items 200
recentf-max-menu-items 15)
(recentf-mode t)
;; time-stamps
;; when there's "Time-stamp: <>" in the first 10 lines of the file
(setq time-stamp-active t
;; check first 10 buffer lines for Time-stamp: <>
time-stamp-line-limit 10
time-stamp-format "%04y-%02m-%02d %02H:%02M:%02S (%u)") ; date format
(add-hook 'write-file-hooks 'time-stamp) ; update when saving
;; use shift + arrow keys to switch between visible buffers
(require 'windmove)
;; automatically save buffers associated with files on buffer switch
;; and on windows switch
(defadvice switch-to-buffer (before save-buffer-now activate)
(when buffer-file-name (save-buffer)))
(defadvice other-window (before other-window-now activate)
(when buffer-file-name (save-buffer)))
(defadvice windmove-up (before other-window-now activate)
(when buffer-file-name (save-buffer)))
(defadvice windmove-down (before other-window-now activate)
(when buffer-file-name (save-buffer)))
(defadvice windmove-left (before other-window-now activate)
(when buffer-file-name (save-buffer)))
(defadvice windmove-right (before other-window-now activate)
(when buffer-file-name (save-buffer)))
;; show-paren-mode: subtle highlighting of matching parens (global-mode)
(show-paren-mode +1)
(setq show-paren-style 'parenthesis)
;; highlight the current line
(global-hl-line-mode +1)
(require 'volatile-highlights)
(volatile-highlights-mode t)
;; tramp, for sudo access
(require 'tramp)
;; keep in mind known issues with zsh - see emacs wiki
(setq tramp-default-method "ssh")
;; ido-mode
(ido-mode t)
(setq ido-enable-prefix nil
ido-enable-flex-matching t
ido-create-new-buffer 'always
ido-use-filename-at-point 'guess
ido-max-prospects 10
ido-save-directory-list-file (concat prelude-savefile-dir "ido.hist")
ido-default-file-method 'selected-window)
;; auto-completion in minibuffer
(icomplete-mode +1)
(set-default 'imenu-auto-rescan t)
;; flyspell-mode does spell-checking on the fly as you type
(setq ispell-program-name "aspell" ; use aspell instead of ispell
ispell-extra-args '("--sug-mode=ultra"))
(autoload 'flyspell-mode "flyspell" "On-the-fly spelling checker." t)
(defun prelude-turn-on-flyspell ()
"Force flyspell-mode on using a positive argument. For use in hooks."
(flyspell-mode +1))
(add-hook 'message-mode-hook 'prelude-turn-on-flyspell)
(add-hook 'text-mode-hook 'prelude-turn-on-flyspell)
;; enable narrowing commands
(put 'narrow-to-region 'disabled nil)
(put 'narrow-to-page 'disabled nil)
(put 'narrow-to-defun 'disabled nil)
;; enabled change region case commands
(put 'upcase-region 'disabled nil)
(put 'downcase-region 'disabled nil)
(require 'expand-region)
;; bookmarks
(setq bookmark-default-file (concat prelude-savefile-dir "bookmarks")
bookmark-save-flag 1)
;; enabled auto-fill mode in text-mode and all related modes
(add-hook 'text-mode-hook 'turn-on-auto-fill)
;; load yasnippet
(require 'yasnippet)
(add-to-list 'yas/snippet-dirs prelude-snippets-dir)
(yas/global-mode 1)
;; projectile is a project management mode
(require 'projectile)
(projectile-global-mode t)
(require 'helm-misc)
(require 'helm-projectile)
(defun helm-prelude ()
"Preconfigured `helm'."
(if (projectile-project-root)
;; add project files and buffers when in project
(helm-other-buffer '(helm-c-source-projectile-files-list
"*helm prelude*")
;; otherwise fallback to helm-mini
;; shorter aliases for ack-and-a-half commands
(defalias 'ack 'ack-and-a-half)
(defalias 'ack-same 'ack-and-a-half-same)
(defalias 'ack-find-file 'ack-and-a-half-find-file)
(defalias 'ack-find-file-same 'ack-and-a-half-find-file-same)
;; dired - reuse current buffer by pressing 'a'
(put 'dired-find-alternate-file 'disabled nil)
;; ediff - don't start another frame
(setq ediff-window-setup-function 'ediff-setup-windows-plain)
;; clean up obsolete buffers automatically
(require 'midnight)
;; automatically indenting yanked text if in programming-modes
(defvar yank-indent-modes '(python-mode LaTeX-mode TeX-mode)
"Modes in which to indent regions that are yanked (or yank-popped). Only
modes that don't derive from `prog-mode' should be listed here.")
(defvar yank-advised-indent-threshold 1000
"Threshold (# chars) over which indentation does not automatically occur.")
(defun yank-advised-indent-function (beg end)
"Do indentation, as long as the region isn't too large."
(if (<= (- end beg) yank-advised-indent-threshold)
(indent-region beg end nil)))
(defadvice yank (after yank-indent activate)
"If current mode is one of 'yank-indent-modes,
indent yanked text (with prefix arg don't indent)."
(if (and (not (ad-get-arg 0))
(or (derived-mode-p 'prog-mode)
(member major-mode yank-indent-modes)))
(let ((transient-mark-mode nil))
(yank-advised-indent-function (region-beginning) (region-end)))))
(defadvice yank-pop (after yank-pop-indent activate)
"If current mode is one of 'yank-indent-modes,
indent yanked text (with prefix arg don't indent)."
(if (and (not (ad-get-arg 0))
(or (derived-mode-p 'prog-mode)
(member major-mode yank-indent-modes)))
(let ((transient-mark-mode nil))
(yank-advised-indent-function (region-beginning) (region-end)))))
;; abbrev config
(add-hook 'text-mode-hook 'prelude-turn-on-abbrev)
;; make a shell script executable automatically on save
(add-hook 'after-save-hook
;; saner regex syntax
(require 're-builder)
(setq reb-re-syntax 'string)
(require 'eshell)
(setq eshell-directory-name (concat prelude-savefile-dir "/eshell/"))
(setq semanticdb-default-save-directory
(concat prelude-savefile-dir "semanticdb"))
;; enable Prelude's keybindings
(prelude-global-mode t)
(provide 'prelude-editor)
;;; prelude-editor.el ends here
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