my-settings.el

;; -*- Emacs-Lisp -*-
;; my settings

;; comment

(defun qiang-comment-dwim-line (&optional arg)
  "Replacement for the comment-dwim command.
If no region is selected and current line is not blank and we are not at the end of the line,
then comment current line.
Replaces default behaviour of comment-dwim, when it inserts comment at the end of the line."
  (interactive "*P")
  (comment-normalize-vars)
  (if (and (not (region-active-p)) (not (looking-at "[ \t]*$")))
      (comment-or-uncomment-region (line-beginning-position) (line-end-position))
    (comment-dwim arg)))
(global-set-key "\M-;" 'qiang-comment-dwim-line)

;; 复制当前行
;; Smart copy, if no region active, it simply copy the current whole line
(defadvice kill-line (before check-position activate)
  (if (member major-mode
              '(emacs-lisp-mode scheme-mode lisp-mode
                                c-mode c++-mode objc-mode js-mode
                                latex-mode plain-tex-mode))
      (if (and (eolp) (not (bolp)))
          (progn (forward-char 1)
                 (just-one-space 0)
                 (backward-char 1)))))
 
(defadvice kill-ring-save (before slick-copy activate compile)
  "When called interactively with no active region, copy a single line instead."
  (interactive (if mark-active (list (region-beginning) (region-end))
                 (message "Copied line")
                 (list (line-beginning-position)
                       (line-beginning-position 2)))))
 
(defadvice kill-region (before slick-cut activate compile)
  "When called interactively with no active region, kill a single line instead."
  (interactive
   (if mark-active (list (region-beginning) (region-end))
     (list (line-beginning-position)
           (line-beginning-position 2)))))
 
;; Copy line from point to the end, exclude the line break
(defun qiang-copy-line (arg)
  "Copy lines (as many as prefix argument) in the kill ring"
  (interactive "p")
  (kill-ring-save (point)
                  (line-end-position))
                  ;; (line-beginning-position (+ 1 arg)))
  (message "%d line%s copied" arg (if (= 1 arg) "" "s")))
 
(global-set-key (kbd "M-k") 'qiang-copy-line)

;; 拷贝代码自动格式化

(dolist (command '(yank yank-pop))
  (eval
   `(defadvice ,command (after indent-region activate)
      (and (not current-prefix-arg)
           (member major-mode
                   '(emacs-lisp-mode
                     lisp-mode
                     clojure-mode
                     scheme-mode
                     haskell-mode
                     ruby-mode
                     rspec-mode
                     python-mode
                     c-mode
                     c++-mode
                     objc-mode
                     latex-mode
                     js-mode
                     plain-tex-mode))
           (let ((mark-even-if-inactive transient-mark-mode))
             (indent-region (region-beginning) (region-end) nil))))))