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Windows 10, Emacs 25.1, Magit

Execute command magit-status and press "TAB". Here result:

Magit-status

If I want to change this text I go to my editor (e.g. Notepad++) and edit text.

The question is:

Can I directy edit text in magit buffer when files are in Unstaged changes?

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    You can not edit text directly in the Magit buffer, but when your cursor is on the changes you want to edit you can press RET to jump to a buffer within Emacs in which you can edit the file. – Arnot Oct 6 '17 at 8:35
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    "go to my editor (e.g. Notepad++)" ??!? – phils Oct 6 '17 at 11:48
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    @phils I hear it's not uncommon to use emacs just for magit; in fact, magit promotes the idea. – Sean Allred Oct 8 '17 at 17:37
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    @SeanAllred Indeed, but there's no denying at least a bit of irony. :) – Basil Oct 8 '17 at 18:52
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The status buffer is just an interface to git; it's not an editor in itself, so you can't edit right from there. In Emacs, this isn't a problem, since you just RET and it takes you to the file/line/column you were at. There is still a feature request for this enhancement, but such functionality would be weird IMO since you'd have to enter some other mode within magit-status-mode since most keys already mean something special.

You mention though that you want to use a different editor to edit this text. If that is your real question, read below.

If your editor supports command-line arguments, you can do this rather easily at a file-level by advising magit-diff-visit-file:

(defun open-in-vscode (orig-fun &rest args)
  (let ((file (car args)))
    ;; If you don't want this behavior for every file/project,
    ;; you can still keep the old behavior using `orig-fun`.
    (if (or t (should-open-in-vs-code file))
        (call-process
         ;; This is VS Code, the only other editor I have installed
         ;; Look up Notepadd++'s arguments as appropriate.
         "/Applications/Visual Studio Code.app/Contents/Resources/app/bin/code"
         nil nil nil
         file)
      (apply orig-fun args))))

(advice-add #'magit-diff-visit-file :around #'open-in-vscode)

If you want to jump to the file:line:column, you'll have to dig deeper into magit-diff-visit-file and possibly provide a reimplementation (then advising using :override) that will do the right thing for you. The line/column information is already available in magit-diff-visit-file, so it would just be a matter of putting that information to other use.

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