Does this image look familiar? I always found Emacs’ tendency to stuck buffer text on the far left of a window annoying, particularly on large screens where it doesn’t just look ugly but also forces you to keep your head twisted to the left to follow the buffer text.
Luckily Visual Fill Column Mode comes to the rescue. The purpose of this
mode is to make buffer text wrap on the
fill-column even in buffers that don’t
use hard wrapping and typically have Visual Line Mode active—hence the name of
this mode. By default it inherits Emacs’ left-wing tendency—which I’d
absolutely agree, politically, but it just doesn’t make for a nice UI.
However there’s a flag that makes Visual Fill Column Mode center text. My use package configuration looks as follows1:
(use-package visual-fill-column :ensure t :defer t :bind (("C-c t v" . visual-fill-column-mode)) :init (dolist (hook '(visual-line-mode-hook prog-mode-hook text-mode-hook)) (add-hook hook #'visual-fill-column-mode)) :config (setq-default visual-fill-column-center-text t visual-fill-column-fringes-outside-margins nil))
The key is
visual-fill-column-center-text which does, well, exactly what the
name says and beautifully centers buffer text:
visual-fill-column-fringes-outside-margins in turn moves the fringes to the
window borders far from the text. By default the option is on, keeping helpful
icons from Flycheck or diff-hl far away from the actual text, but I’d
like information close with the actual text.
setq-default to change the options as both are buffer-local
As with many things UI-related in Emacs, the
implementation is a dirty hack: It extends the window margins to cover
the empty area of the buffer. As hacks are hacks there are a couple of issues;
for instance text scale adjustments go unnoticed at first: Visual Fill Column
has no chance to intercept
text-scale-adjust or similar functions to recompute
the margins so the alignment will be off after changing the text scale until the
But generally Visual Fill Column Mode works perfect, and is now the default for
all buffers in my Emacs, even if they don’t use
By the way, Visual Fill is a by-product of Writeroom Mode which is a nice mode for distracting-free writing where the whole UI of the buffer is reduced, even more than Emacs’ normal UI. Take a look at it, too, if you like the idea.
Update (Oct 09, 2016): Mention
In this form↩︎
:defer tis technically redundant, because
:defer t. I prefer an explicit
:defer thowever, because I can never remember which forms imply
:defer t. Also, a decade of using Python code has really etched the Zen Of Python in my mind— “Explicit is better than implicit”—so I always found the implicit
use-packageto be one of its less brilliant features.