Sweep comes with a custom theme called sweeprolog-pce, that
emulates the Prolog code highlighting provided by PceEmacs, the
SWI-Prolog built-in Emacs-like editor (see
Using the
PceEmacs built-in editor in the SWI-Prolog manual). If you are
starting out with Sweep after coming from PceEmacs, enabling this
theme may soften your landing by providing a more familiar experience.
The sweeprolog-pce theme only affects faces that Sweep itself
defines, so you can use it along other themes that you may have
enabled. To enable this theme or the current Emacs session, type
M-x load-theme RET sweeprolog-pce RET. To enable it
for future sessions, add the following to your Emacs configuration:
(load-theme 'sweeprolog-pce t)
For more information about custom themes in Emacs, See (emacs)Custom Themes.
In versions up to and including 0.20.0, Sweep used to provide a
different mechanism for emulating the highlighting of PceEmacs that
involved customizing the user option sweeprolog-faces-style.
When that option was set to light or dark, Sweep would
use different sets of faces that mimic the highlighting of PceEmacs.
sweeprolog-faces-style is now deprecated, and you should
instead use the sweeprolog-pce theme. Still, in benefit of
users that have sweeprolog-faces-style set and expect Sweep to
use PceEmacs highlighting, Sweep checks if
sweeprolog-faces-style is either light or dark
when you first open a Prolog buffer, and if so it simply enables the
sweeprolog-pce theme to get the same effect.