;; License: GPL
;; Keywords: git, version control, release management
;;
-;; Compatibility: Emacs21
-
+;; Compatibility: Emacs21, Emacs22 and EmacsCVS
+;; Git 1.5 and up
;; This file is *NOT* part of GNU Emacs.
;; This file is distributed under the same terms as GNU Emacs.
;;; Compatibility:
;;
-;; It requires GNU Emacs 21. If you'are using Emacs 20, try
-;; changing this:
+;; It requires GNU Emacs 21 or later and Git 1.5.0 and up
+;;
+;; If you'are using Emacs 20, try changing this:
;;
;; (overlay-put ovl 'face (list :background
;; (cdr (assq 'color (cddddr info)))))
;;
;;; Code:
-(require 'cl) ; to use `push', `pop'
-
-(defun color-scale (l)
- (let* ((colors ())
- r g b)
- (setq r l)
- (while r
- (setq g l)
- (while g
- (setq b l)
- (while b
- (push (concat "#" (car r) (car g) (car b)) colors)
- (pop b))
- (pop g))
- (pop r))
- colors))
+(eval-when-compile (require 'cl)) ; to use `push', `pop'
+
+
+(defun git-blame-color-scale (&rest elements)
+ "Given a list, returns a list of triples formed with each
+elements of the list.
+
+a b => bbb bba bab baa abb aba aaa aab"
+ (let (result)
+ (dolist (a elements)
+ (dolist (b elements)
+ (dolist (c elements)
+ (setq result (cons (format "#%s%s%s" a b c) result)))))
+ result))
+
+;; (git-blame-color-scale "0c" "04" "24" "1c" "2c" "34" "14" "3c") =>
+;; ("#3c3c3c" "#3c3c14" "#3c3c34" "#3c3c2c" "#3c3c1c" "#3c3c24"
+;; "#3c3c04" "#3c3c0c" "#3c143c" "#3c1414" "#3c1434" "#3c142c" ...)
+
+(defmacro git-blame-random-pop (l)
+ "Select a random element from L and returns it. Also remove
+selected element from l."
+ ;; only works on lists with unique elements
+ `(let ((e (elt ,l (random (length ,l)))))
+ (setq ,l (remove e ,l))
+ e))
(defvar git-blame-dark-colors
- (color-scale '("0c" "04" "24" "1c" "2c" "34" "14" "3c")))
+ (git-blame-color-scale "0c" "04" "24" "1c" "2c" "34" "14" "3c")
+ "*List of colors (format #RGB) to use in a dark environment.
+
+To check out the list, evaluate (list-colors-display git-blame-dark-colors).")
(defvar git-blame-light-colors
- (color-scale '("c4" "d4" "cc" "dc" "f4" "e4" "fc" "ec")))
+ (git-blame-color-scale "c4" "d4" "cc" "dc" "f4" "e4" "fc" "ec")
+ "*List of colors (format #RGB) to use in a light environment.
+
+To check out the list, evaluate (list-colors-display git-blame-light-colors).")
-(defvar git-blame-ancient-color "dark green")
+(defvar git-blame-colors '()
+ "Colors used by git-blame. The list is built once when activating git-blame
+minor mode.")
+
+(defvar git-blame-ancient-color "dark green"
+ "*Color to be used for ancient commit.")
(defvar git-blame-autoupdate t
"*Automatically update the blame display while editing")
"A queue of update requests")
(make-variable-buffer-local 'git-blame-update-queue)
+;; FIXME: docstrings
+(defvar git-blame-file nil)
+(defvar git-blame-current nil)
+
(defvar git-blame-mode nil)
(make-variable-buffer-local 'git-blame-mode)
-(unless (assq 'git-blame-mode minor-mode-alist)
- (setq minor-mode-alist
- (cons (list 'git-blame-mode " blame")
- minor-mode-alist)))
+
+(defvar git-blame-mode-line-string " blame"
+ "String to display on the mode line when git-blame is active.")
+
+(or (assq 'git-blame-mode minor-mode-alist)
+ (setq minor-mode-alist
+ (cons '(git-blame-mode git-blame-mode-line-string) minor-mode-alist)))
;;;###autoload
(defun git-blame-mode (&optional arg)
- "Minor mode for displaying Git blame"
+ "Toggle minor mode for displaying Git blame
+
+With prefix ARG, turn the mode on if ARG is positive."
(interactive "P")
- (if arg
- (setq git-blame-mode (eq arg 1))
- (setq git-blame-mode (not git-blame-mode)))
+ (cond
+ ((null arg)
+ (if git-blame-mode (git-blame-mode-off) (git-blame-mode-on)))
+ ((> (prefix-numeric-value arg) 0) (git-blame-mode-on))
+ (t (git-blame-mode-off))))
+
+(defun git-blame-mode-on ()
+ "Turn on git-blame mode.
+
+See also function `git-blame-mode'."
(make-local-variable 'git-blame-colors)
(if git-blame-autoupdate
(add-hook 'after-change-functions 'git-blame-after-change nil t)
(remove-hook 'after-change-functions 'git-blame-after-change t))
(git-blame-cleanup)
- (if git-blame-mode
- (progn
- (let ((bgmode (cdr (assoc 'background-mode (frame-parameters)))))
- (if (eq bgmode 'dark)
- (setq git-blame-colors git-blame-dark-colors)
- (setq git-blame-colors git-blame-light-colors)))
- (setq git-blame-cache (make-hash-table :test 'equal))
- (git-blame-run))
- (cancel-timer git-blame-idle-timer)))
+ (let ((bgmode (cdr (assoc 'background-mode (frame-parameters)))))
+ (if (eq bgmode 'dark)
+ (setq git-blame-colors git-blame-dark-colors)
+ (setq git-blame-colors git-blame-light-colors)))
+ (setq git-blame-cache (make-hash-table :test 'equal))
+ (setq git-blame-mode t)
+ (git-blame-run))
+
+(defun git-blame-mode-off ()
+ "Turn off git-blame mode.
+
+See also function `git-blame-mode'."
+ (git-blame-cleanup)
+ (if git-blame-idle-timer (cancel-timer git-blame-idle-timer))
+ (setq git-blame-mode nil))
;;;###autoload
(defun git-reblame ()
"Recalculate all blame information in the current buffer"
- (unless git-blame-mode
- (error "git-blame is not active"))
(interactive)
+ (unless git-blame-mode
+ (error "Git-blame is not active"))
+
(git-blame-cleanup)
(git-blame-run))
(t
nil)))
-
(defun git-blame-new-commit (hash src-line res-line num-lines)
(save-excursion
(set-buffer git-blame-file)
(inhibit-point-motion-hooks t)
(inhibit-modification-hooks t))
(when (not info)
- (let ((color (pop git-blame-colors)))
- (unless color
- (setq color git-blame-ancient-color))
+ ;; Assign a random color to each new commit info
+ ;; Take care not to select the same color multiple times
+ (let ((color (if git-blame-colors
+ (git-blame-random-pop git-blame-colors)
+ git-blame-ancient-color)))
(setq info (list hash src-line res-line num-lines
(git-describe-commit hash)
(cons 'color color))))