106 lines
5 KiB
Org Mode
106 lines
5 KiB
Org Mode
#+TITLE: Evil-snipe layer
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#+TAGS: layer|vim
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[[file:img/Cat_With_Rifle.jpg]]
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* Table of Contents :TOC_5_gh:noexport:
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- [[#description][Description]]
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- [[#features][Features:]]
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- [[#install][Install]]
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- [[#layer][Layer]]
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- [[#improved-f-and-t-search-behavior][Improved f and t search behavior]]
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- [[#two-character-search-with-s][Two-character search with s]]
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- [[#more-scopes][More scopes]]
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- [[#symbol-groups][Symbol groups]]
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- [[#key-bindings][Key bindings]]
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* Description
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This layer adds various replacements for vim’s default search functions.
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** Features:
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- Alternative implementation of vim’s default search operations.
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- Replacement of evil-surround with a two-character search.
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- Support for alternative scopes for default search operations.
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- Support for alternative motions based on configurable regexps.
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* Install
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** Layer
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To use this configuration layer, add it to your =~/.spacemacs=. You will need to
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add =evil-snipe= to the existing =dotspacemacs-configuration-layers= list in this
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file.
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** Improved f and t search behavior
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With evil-snipe you can define your own search scope for ~f~ and ~t~ searches
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which means that you won’t have to jump to the correct line before searching
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with ~f~ / ~t~ / ~F~ / ~T~. And after you have found a match, you can just press
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~f~ or ~t~ again afterwards to continue the search. No need to use ~;~ / ~,~.
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This alternate behavior is disabled by default, to enable it set the
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layer variable =evil-snipe-enable-alternate-f-and-t-behaviors= to =t=:
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#+BEGIN_SRC emacs-lisp
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(setq-default dotspacemacs-configuration-layers
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'((evil-snipe :variables evil-snipe-enable-alternate-f-and-t-behaviors t)))
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#+END_SRC
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** Two-character search with s
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With the ~s~/~S~ keys you can do a simple search like ~f~/~t~, but instead of
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searching for one character, you search for two. This makes the search a lot
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more precise than regular ~f~/~t~ searches. While you can search forward or
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backwards in the buffer with ~/~ and ~?~, ~s~ / ~S~ are much easier to reach,
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don’t require you to press enter and they are precise enough for many common
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purposes.
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** More scopes
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Evil-snipe also adds several scope options for searches (set =evil-snipe-scope=
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and =evil-snipe-repeat-scope= to one of these, the default value is =buffer=):
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| Value | Description |
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|---------------+--------------------------------------------------------------------------|
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| buffer | search in the rest of the buffer after the cursor (=vim-sneak= behavior) |
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| line | search in the current line after the cursor (=vim-seek= behavior) |
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| visible | search in the rest of the visible buffer only |
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| whole-line | same as =line=, but highlight matches on either side of cursor |
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| whole-buffer | same as =buffer=, but highlight *all* matches in buffer |
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| whole-visible | same as =visible=, but highlight *all* visible matches in buffer |
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If you do not want to replace the regular ~f~ / ~F~ / ~t~ / ~T~ behavior, just
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remove this line from =evil-snipe/packages.el=:
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=(evil-snipe-replace-evil)=
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** Symbol groups
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With symbol groups you can let a character stand for a regex, for example a
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group of characters. By adding a pair of =(CHAR REGEX)= to the list
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=evil-snipe-aliases= you can search for a regex very simply:
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- Here we set the ~[~ character to mean =all characters [({= *in all modes* so a
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search with ~sa[~ would find ~a[~, ~a{~ or ~a(~.
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#+BEGIN_SRC emacs-lisp
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;; Alias [ and ] to all types of brackets
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(push '(?\[ "[[{(]") evil-snipe-aliases)
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(push '(?\] "[]})]") evil-snipe-aliases)
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#+END_SRC
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- Here we set the char ~:~ to mean “a regex matching python function
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definitions” (but only in python-mode), so by searching with ~f:fff~ you can
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quickly cycle through all function definitions in a buffer!
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#+BEGIN_SRC emacs-lisp
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;; For python style functions
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(add-hook 'python-mode-hook
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(lambda ()
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(make-variable-buffer-local 'evil-snipe-aliases)
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(push '(?: "def .+:") evil-snipe-aliases)))
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#+END_SRC
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* Key bindings
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| Key binding | Description |
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|-------------+-----------------------------------------------------------------------------------------|
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| ~f~ | search forward for the next entered character and set the cursor to it’s position |
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| ~F~ | search backward for the next entered character and set the cursor to it’s position |
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| ~t~ | search forward for the next entered character and set the cursor before it’s position |
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| ~T~ | search backward for the next entered character and set the cursor before it’s position |
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| ~s~ | search forward for the next entered two characters and set the cursor to it’s position |
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| ~S~ | search backward for the next entered two characters and set the cursor to it’s position |
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