This is Focus, a package that dims surrounding text. It works with any theme and can be configured to focus in on different regions like sentences, paragraphs or code-blocks.
It’s available on MELPA and MELPA Stable:
M-x package-install focus
Enable focus-mode with M-x focus-mode.
A few interactive functions are provided:
| Function | Description |
|---|---|
focus-change-thing | Adjust the narrowness of the focused section for the current buffer |
focus-pin | Pin the focused section to its current location or the region, if active |
focus-unpin | Unpin the focused section |
focus-next-thing | Move the point to the middle of the Nth next thing |
focus-prev-thing | Move the point to the middle of the Nth previous thing |
Focus relies on Thing At Point, which can retrieve a thing surrounding the
point. These things may be a symbol, list, S-expression (sexp), function
definition (defun), sentence, line, page and others. Calling M-x
focus-change-thing allows you to interactively change the kind of region
which should be in focus.
Enable focus-read-only-mode with M-x focus-read-only-mode. It inhibits
changes in a buffer, hides the cursor and provides bindings for moving
between things.
Some bindings for simple navigation and exiting `focus-read-only-mode` are provided.
| Keybinding | Description |
|---|---|
n | Jump to next thing |
SPC | Jump to next thing |
p | Jump to previous thing |
S-SPC | Jump to previous thing |
i | Exit focus-read-only-mode |
q | Exit focus-read-only-mode |
The choice of what thing is suitable for a mode may be configured by
setting the variable focus-mode-to-thing. The default is
'((prog-mode . defun) (text-mode . sentence))
For modes inheriting prog-mode (which are most programming modes), the
default is the function-body, and for modes inheriting text-mode, the
default is a sentence.
For instance, adding the following to your .emacs-file:
(add-to-list 'focus-mode-to-thing '(python-mode . paragraph))changes python-mode to focus in on code-blocks with no blank lines rather
than the entire function.
According to this reddit post, Focus plays nice with lsp-mode.
Focus offers two faces, one for the focused- and unfocused area. By default,
the focus-focused is the empty face, meaning there is no change, and
focus-unfocused inherits the comment face (which is usually subtle). The
faces can easily be customized via M-x list-faces-display.