| ;;; Clang-format emacs integration for use with C/Objective-C/C++. |
| |
| ;; This defines a function clang-format-region that you can bind to a key. |
| ;; A minimal .emacs would contain: |
| ;; |
| ;; (load "<path-to-clang>/tools/clang-format/clang-format.el") |
| ;; (global-set-key [C-M-tab] 'clang-format-region) |
| ;; |
| ;; Depending on your configuration and coding style, you might need to modify |
| ;; 'style' in clang-format, below. |
| |
| (require 'json) |
| |
| ;; *Location of the clang-format binary. If it is on your PATH, a full path name |
| ;; need not be specified. |
| (defvar clang-format-binary "clang-format") |
| |
| (defun clang-format-region () |
| "Use clang-format to format the currently active region." |
| (interactive) |
| (let ((beg (if mark-active |
| (region-beginning) |
| (min (line-beginning-position) (1- (point-max))))) |
| (end (if mark-active |
| (region-end) |
| (line-end-position)))) |
| (clang-format beg end))) |
| |
| (defun clang-format-buffer () |
| "Use clang-format to format the current buffer." |
| (interactive) |
| (clang-format (point-min) (point-max))) |
| |
| (defun clang-format (begin end) |
| "Use clang-format to format the code between BEGIN and END." |
| (let* ((orig-windows (get-buffer-window-list (current-buffer))) |
| (orig-window-starts (mapcar #'window-start orig-windows)) |
| (orig-point (point)) |
| (style "LLVM")) |
| (unwind-protect |
| (call-process-region (point-min) (point-max) clang-format-binary t t nil |
| "-offset" (number-to-string (1- begin)) |
| "-length" (number-to-string (- end begin)) |
| "-cursor" (number-to-string (1- (point))) |
| "-style" style) |
| (goto-char (point-min)) |
| (let ((json-output (json-read-from-string |
| (buffer-substring-no-properties |
| (point-min) (line-beginning-position 2))))) |
| (delete-region (point-min) (line-beginning-position 2)) |
| (goto-char (1+ (cdr (assoc 'Cursor json-output)))) |
| (dotimes (index (length orig-windows)) |
| (set-window-start (nth index orig-windows) |
| (nth index orig-window-starts))))))) |