kakoune/README.asciidoc

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Kakoune
=======
Introduction:
-------------
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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.
Kakoune can operate in two modes, normal and insertion. In insertion mode,
keys are directly inserted into the current buffer. In normal mode, keys
are used to manipulate the current selection and to enter insertion mode.
There is no concept of cursor in kakoune, only selections, a single character
selection can be seen as a cursor but there is no difference internally.
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Building
--------
Kakoune dependencies are:
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* GCC >= 4.6
* boost
* ncurses
To build, just type *make* in the src directory
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Basic Movement
--------------
* _space_: select the character under selection end
* _h_: select the character on the right of selection end
* _j_: select the character below the selection end
* _k_: select the character above the selection end
* _l_: select the character on the left of selection end
* _w_: select the word and following whitespaces on the right of selection end
* _b_: select preceding whitespaces and the word on the left of selection end
* _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
an end-of-line)
* _alt-x_: expand selections to contain full lines (including end-of-lines)
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* _%_: select whole buffer
* _alt-H_: select to line begin
* _alt-L_: select to line end
Appending
---------
for most selection commands, using shift permits to add to current selection
instead of replacing it. for example, _wWW_ selects 3 consecutive words
Using Counts
------------
Most selection commands also support counts, which are entered before the
command itself.
for example, _3W_ selects 3 consecutive words and _3w_ select the third word on
the right of selection end.
Changes
-------
* _i_: insert before current selection
* _a_: insert after current selection
* _d_: yank and delete current selection
* _c_: yank and delete current selection and insert
* _I_: insert at current selection begin line start
* _A_: insert at current selection end line end
* _o_: insert in a new line below current selection end
* _O_: insert in a new line above current selection begin
* _p_: paste after current selection end
* _P_: paste before current selection begin
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* _alt-j_: join selected lines
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Multi Selection
---------------
Kak was designed from the start to handle multiple selections.
On way to get a multiselection is via the _s_ key.
For example, to change all occurences of word 'roger' to word 'marcel'
in a paragraph, here is what can be done:
select the paragraph with enough _x_. press _s_ and enter roger then enter.
now paragraph selection was replaced with multiselection of each roger in
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
selection according to the regex entered. To split a comma separated list,
use _alt-s_ then ', *'
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Captures
--------
Selections can have associated captures. When selections were made from a
regex search (like _/_ key of _s_ key), the regex capture groups are available
from the selection.
While inserting, _^B_ key followed by a digit inserts the designated capture.
Highlighters
------------
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Manipulation of the displayed text is done through highlighters, which can be added
or removed with the command :addhl <highlighter_name> <highlighter_parameters...>
and :rmhl <highlighter_id>
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existing highlighters are:
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* *highlight_selections*: used to make current selection visible
* *expand_tabs*: expand tabs to next 8 multiple column (to make configurable)
* *hlcpp*: quick'n'dirty c++ code highlighter
* *number_lines*: show line numbers
* *regex*: highlight a regex, takes 3 parameters <regex> <fg_color> <bg_color>
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Filters
-------
Filters can be installed to interact with buffer modifications. They can be
added or removed with :addfilter <filter_name> <filter_parameters...> and
:rmfilter <filter_id>
exisiting filters are:
* *preserve_indent*: insert previous line indent when inserting a newline
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Hooks
-----
commands can be registred to be executed when certain events arise.
to register a hook, use the hook command.
:hook <hook_name> <filtering_regex> <command> <command_args>...
for example, to automatically use cplusplus highlighting with .cc files,
use the following command:
:hook WinCreate .*\.cc addfilter hlcpp