An emacs minor mode to surround the region with smart delimiters interactively.
When the region is active, most input¹ is redirected to the minibuffer and
treated as a delimiter for the region. The input is used as the left delimiter
from which the right one is derived using siege-transform-regexs applied to
tokens generated by siege-boundary-list and siege-block-*. If such
derivations are not desired they may be disabled via "C-c a" in the minibuffer
or by default (siege-default-derive). This process may be explicitly invoked
by calling siege-explicit-call, bound to "M-s M-s".
All changes are dynamically displayed in the buffer (see siege-preview-face)
and may be committed by "Ret" in the minibuffer. It is also possible to commit
the input on "space" as set by siege-default-end-on-space and toggled by
"C-c s" in the minibuffer.
By default siege-mode understands the usual delimeter pairs, as well as latex
LaTeX begin/end pairs and left/right pairs. Moreover, for ease of use it will
pair both _{ and ^{ with } by default.
To install the package, you use quelpa-use-package
(use-package siege-mode
:ensure quelpa
:quelpa (siege-mode :repo "tslilc/siege-mode" :fetcher github))GPL v3+
¹ siege-mode remaps self-insert-command so that key-presses which would
otherwise simply insert a character trigger delimiter input. This would seem to
be the best compromise between usability and unobtrusiveness, but the author is
certainly open to suggestion.