Re: [PATCH 1/2] git-blame.el: separate git-blame-mode to ease maintenance

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Xavier Maillard <zedek@xxxxxxx> writes:

> git-blame-mode has been splitted into git-blame-mode-on and
> git-blame-mode-off; it now conditionnaly calls one of them depending
> of how we call it. Code is now easier to maintain and to understand.
>
> Fixed `git-reblame' function: interactive form was at the wrong
> place.
>
> String displayed on the mode line is now configurable through
> `git-blame-mode-line-string` (default to " blame").

Why do you feel the need for this?  I don't remember seeing any other
minor mode that does this.

Other than that, I think it is an improvement.

> Signed-off-by: Xavier Maillard <zedek@xxxxxxx>
> ---
>  contrib/emacs/git-blame.el |   55 +++++++++++++++++++++++++++++--------------
>  1 files changed, 37 insertions(+), 18 deletions(-)
>
> diff --git a/contrib/emacs/git-blame.el b/contrib/emacs/git-blame.el
> index 64ad50b..bd87a86 100644
> --- a/contrib/emacs/git-blame.el
> +++ b/contrib/emacs/git-blame.el
> @@ -127,39 +127,58 @@
>  
>  (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"
> +  (interactive)
>    (unless git-blame-mode
>      (error "git-blame is not active"))
> -  (interactive)
> +  
>    (git-blame-cleanup)
>    (git-blame-run))

-- 
David Kågedal

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