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102 lines
4 KiB
Markdown
102 lines
4 KiB
Markdown
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# Zsh Navigation Tools
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http://imageshack.com/a/img633/7967/ps6rKR.png
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A tool generating a selectable curses-based list of elements that has access to
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current Zsh session, i.e. has broad capabilities to work together with it.
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That's n-list. The files n-cd, n-env, n-kill, etc. are applications of
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the tool. Feature highlights include incremental multi-word searching, ANSI
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coloring, unique mode, horizontal scroll, non-selectable elements, grepping and
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various integrations with Zsh.
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## History Widget
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To have n-history as the incremental searcher bound to Ctrl-R copy znt-*
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files into the */site-functions dir (unless you use Oh My Zsh) and
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add:
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autoload znt-history-widget
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zle -N znt-history-widget
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bindkey "^R" znt-history-widget
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to .zshrc. This is done automatically when using Oh My Zsh. Two other
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widgets exist, znt-cd-widget and znt-kill-widget, they can be too assigned
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to key combinations:
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zle -N znt-cd-widget
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bindkey "^T" znt-cd-widget
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zle -N znt-kill-widget
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bindkey "^Y" znt-kill-widget
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## Introduction
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The tools are:
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- n-aliases - browses aliases, relegates editing to vared
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- n-cd - browses dirstack and bookmarked directories, allows to enter selected directory
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- n-functions - browses functions, relegates editing to zed or vared
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- n-history - browses history, allows to edit and run commands from it
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- n-kill - browses processes list, allows to send signal to selected process
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- n-env - browses environment, relegates editing to vared
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- n-options - browses options, allows to toggle their state
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- n-panelize - loads output of given command into the list for browsing
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All tools support horizontal scroll with <,>, {,}, h,l or left and right
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cursors. Other keys are:
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- [,] - jump directory bookmarks in n-cd and typical signals in n-kill
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- Ctrl-d, Ctrl-u - half page up or down
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- Ctrl-p, Ctrl-n - previous and next (also done with vim's j,k)
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- Ctrl-l - redraw of whole display
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- g, G - beginning and end of the list
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- Ctrl-o, o - enter uniq mode (no duplicate lines)
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- / - start incremental search
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- Enter - finish incremental search, retaining filter
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- Esc - exit incremental search, clearing filter
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- Ctrl-w (in incremental search) - delete whole word
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- Ctrl-k (in incremental search) - delete whole line
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## Programming
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The function n-list is used as follows:
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n-list {element1} [element2] ... [elementN]
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This is all that is needed to be done to have the features like ANSI coloring,
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incremental multi-word search, unique mode, horizontal scroll, non-selectable
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elements (grepping is done outside n-list, see the tools for how it can be
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done). To set up non-selectable entries add their indices into array
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NLIST_NONSELECTABLE_ELEMENTS:
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typeset -a NLIST_NONSELECTABLE_ELEMENTS
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NLIST_NONSELECTABLE_ELEMENTS=( 1 )
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Result is stored as $reply[REPLY] ($ isn't needed before REPLY because
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of arithmetic context inside []). The returned array might be different from
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input arguments as n-list can process them via incremental search or uniq
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mode. $REPLY is the index in that possibly processed array. If $REPLY
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equals -1 it means that no selection have been made (user quitted via q
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key).
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To set up entries that can be jumped to with [,] keys add their indices to
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NLIST_HOP_INDEXES array:
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typeset -a NLIST_HOP_INDEXES
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NLIST_HOP_INDEXES=( 1 10 )
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n-list can automatically colorize entries according to a Zsh pattern.
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Following example will colorize all numbers with blue:
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local NLIST_COLORING_PATTERN="[0-9]##"
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local NLIST_COLORING_COLOR=$'\x1b[00;34m'
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local NLIST_COLORING_END_COLOR=$'\x1b[0m'
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local NLIST_COLORING_MATCH_MULTIPLE=1
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n-list "This is a number 123" "This line too has a number: 456"
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Blue is the default color, it doesn't have to be set. See zshexpn man page
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for more information on Zsh patterns. Briefly, comparing to regular
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expressions, (#s) is ^, (#e) is $, # is *, ## is +. Alternative
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will work when in parenthesis, i.e. (a|b). BTW by using this method you can
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colorize output of the tools, via their config files (check out e.g. n-cd.conf,
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it uses this).
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