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204 lines
6.6 KiB
Plaintext
204 lines
6.6 KiB
Plaintext
Kakoune
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=======
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Introduction:
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-------------
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Kakoune is a code editor heavily inspired by vim, as such most of it's
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commands are similar to vi's ones.
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Kakoune can operate in two modes, normal and insertion. In insertion mode,
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keys are directly inserted into the current buffer. In normal mode, keys
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are used to manipulate the current selection and to enter insertion mode.
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There is no concept of cursor in kakoune, only selections, a single character
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selection can be seen as a cursor but there is no difference internally.
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Building
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--------
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Kakoune dependencies are:
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* GCC >= 4.6
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* boost
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* ncurses
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To build, just type *make* in the src directory
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Basic Movement
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--------------
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* _space_: select the character under selection end
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* _h_: select the character on the right of selection end
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* _j_: select the character below the selection end
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* _k_: select the character above the selection end
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* _l_: select the character on the left of selection end
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* _w_: select the word and following whitespaces on the right of selection end
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* _b_: select preceding whitespaces and the word on the left of selection end
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* _e_: select preceding whitespaces and the word on the right of selection end
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* _x_: select line on which selection end lies (or next line when end lies on
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an end-of-line)
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* _alt-x_: expand selections to contain full lines (including end-of-lines)
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* _%_: select whole buffer
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* _gh_, _alt-H_: select to line begin
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* _gl_, _alt-L_: select to line end
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* _gg_, _gt_: go to the first line
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* _gb_: go to the last line
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Appending
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---------
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for most selection commands, using shift permits to add to current selection
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instead of replacing it. for example, _wWW_ selects 3 consecutive words
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Using Counts
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------------
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Most selection commands also support counts, which are entered before the
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command itself.
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for example, _3W_ selects 3 consecutive words and _3w_ select the third word on
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the right of selection end.
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* _space_: when used with count, keep only the counth selection
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* _alt-space_: when used with count, remove the counth selection
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Changes
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-------
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* _i_: insert before current selection
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* _a_: insert after current selection
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* _d_: yank and delete current selection
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* _c_: yank and delete current selection and insert
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* _I_: insert at current selection begin line start
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* _A_: insert at current selection end line end
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* _o_: insert in a new line below current selection end
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* _O_: insert in a new line above current selection begin
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* _p_: paste after current selection end
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* _P_: paste before current selection begin
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* _alt-j_: join selected lines
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* _|_: pipe each selections through the given external filter program
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and replace with it's output.
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Multi Selection
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---------------
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Kak was designed from the start to handle multiple selections.
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On way to get a multiselection is via the _s_ key.
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For example, to change all occurences of word 'roger' to word 'marcel'
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in a paragraph, here is what can be done:
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select the paragraph with enough _x_. press _s_ and enter roger then enter.
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now paragraph selection was replaced with multiselection of each roger in
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the paragraph. press _c_ and marcel<esc> to replace rogers with marcels.
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A multiselection can also be obtained with _Alt-s_, which splits the current
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selection according to the regex entered. To split a comma separated list,
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use _alt-s_ then ', *'
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To clear multiple selections, use _space_. To keep only the nth selection
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use _n_ followed by _space_.
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Object Selection
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----------------
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Using alt-i and alt-a, you can select some text object, the starting
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point is always the last character of the selection.
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* _b_, _(_ or _)_: select the enclosing parenthesis
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* _B_, _{_ or _}_: select the enclosing {} block
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* _[_ or _]_: select the enclosing [] block
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* _<_ or _>_: select the enclosing <> block
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* w: select the whole word
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* W: select the whole WORD
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When it makes sense, alt-i selects the inner object and alt-a the whole
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object. For example alt-i ( will only select the inside of the parenthesis.
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Registers
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---------
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registers are named list of text. They are used for various purpose, like
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storing the last yanked test, or the captures groups associated with the
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last selection.
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While in insert mode, ctrl-r followed by a register name (one character)
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inserts it.
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For example, ctrl-r followed by " will insert the currently yanked text.
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ctrl-r followed by 2 will insert the second capture group from the last regex
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selection.
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Registers are lists, instead of simply text in order to interact well with
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multiselection. Each selection have it's own captures, or yank buffer.
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Highlighters
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------------
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Manipulation of the displayed text is done through highlighters, which can be added
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or removed with the command :addhl <highlighter_name> <highlighter_parameters...>
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and :rmhl <highlighter_id>
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existing highlighters are:
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* *highlight_selections*: used to make current selection visible
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* *expand_tabs*: expand tabs to next 8 multiple column (to make configurable)
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* *number_lines*: show line numbers
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* *regex*: highlight a regex, takes 3 parameters <regex> <fg_color> <bg_color>
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* *group*: highlighter group, containing other highlighters. takes one
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parameter, <group_name>. useful when multiple highlighters work
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together and need to be removed as one. Adding and removing from
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a group can be done using
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:addhl -group <group> <highlighter_name> <highlighter_parameters...>
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:rmhl -group <group> <highlighter_name>
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Filters
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-------
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Filters can be installed to interact with buffer modifications. They can be
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added or removed with :addfilter <filter_name> <filter_parameters...> and
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:rmfilter <filter_id>
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exisiting filters are:
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* *preserve_indent*: insert previous line indent when inserting a newline
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* *cleanup_whitespaces*: remove trailing whitespaces on the previous line
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when inserting an end-of-line.
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* *expand_tabulations*: insert spaces instead of tab characters
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Hooks
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-----
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commands can be registred to be executed when certain events arise.
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to register a hook, use the hook command.
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:hook <scope> <hook_name> <filtering_regex> <command> <command_args>...
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<scope> can be either global or window, as hooks can be registered per
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window.
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for example, to automatically use line numbering with .cc files,
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use the following command:
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:hook global WinCreate .*\.cc addhl number_lines
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Shell expension
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---------------
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Commands support the shell backtick syntax, and kakoune internal state
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can be accessed through environment variable. For example, if you are
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editing the editor.cc file, typing ':edit `echo ${kak_bufname/%.cc/.hh}`'
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will edit the editor.hh file.
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