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fzf/fzf
Junegunn Choi 1c20255504 Fix typos in help message 
Close #425. Thanks to @blueyed.
2015-11-19 09:58:07 +09:00

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#!/usr/bin/env ruby
# encoding: utf-8
#
# ____ ____
# / __/___ / __/
# / /_/_ / / /_
# / __/ / /_/ __/
# /_/ /___/_/ Fuzzy finder for your shell
#
# Version: 0.8.9 (Dec 24, 2014)
# Deprecation alert:
# This script is no longer maintained. Use the new Go version.
#
# Author: Junegunn Choi
# URL: https://github.com/junegunn/fzf
# License: MIT
#
# Copyright (c) 2014 Junegunn Choi
#
# MIT License
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
begin
require 'curses'
rescue LoadError
$stderr.puts 'curses gem is not installed. Try `gem install curses`.'
sleep 1
exit 1
end
require 'thread'
require 'set'
unless String.method_defined? :force_encoding
class String
def force_encoding *arg
self
end
end
end
class String
attr_accessor :orig
def tokenize delim, nth
unless delim
# AWK default
prefix_length = (index(/\S/) || 0) rescue 0
tokens = scan(/\S+\s*/) rescue []
else
prefix_length = 0
tokens = scan(delim) rescue []
end
nth.map { |n|
if n.begin == 0 && n.end == -1
[prefix_length, tokens.join]
elsif part = tokens[n]
[prefix_length + (tokens[0...(n.begin)] || []).join.length,
part.join]
end
}.compact
end
end
class FZF
C = Curses
attr_reader :rxflag, :sort, :nth, :color, :black, :ansi256, :reverse, :prompt,
:mouse, :multi, :query, :select1, :exit0, :filter, :extended,
:print_query, :with_nth
def sync
@shr_mtx.synchronize { yield }
end
def get name
sync { instance_variable_get name }
end
def geta(*names)
sync { names.map { |name| instance_variable_get name } }
end
def call(name, method, *args)
sync { instance_variable_get(name).send(method, *args) }
end
def set name, value = nil
sync do
instance_variable_set name,
(block_given? ? yield(instance_variable_get(name)) : value)
end
end
def initialize argv, source = $stdin
@rxflag = nil
@sort = ENV.fetch('FZF_DEFAULT_SORT', 1000).to_i
@color = true
@ansi256 = true
@black = false
@multi = false
@mouse = true
@extended = nil
@select1 = false
@exit0 = false
@filter = nil
@nth = nil
@with_nth = nil
@delim = nil
@reverse = false
@prompt = '> '
@shr_mtx = Mutex.new
@expect = false
@print_query = false
argv =
if opts = ENV['FZF_DEFAULT_OPTS']
require 'shellwords'
Shellwords.shellwords(opts) + argv
else
argv.dup
end
while o = argv.shift
case o
when '--version' then FZF.version
when '-h', '--help' then usage 0
when '-m', '--multi' then @multi = true
when '+m', '--no-multi' then @multi = false
when '-x', '--extended' then @extended = :fuzzy
when '+x', '--no-extended' then @extended = nil
when '-i' then @rxflag = Regexp::IGNORECASE
when '+i' then @rxflag = 0
when '-c', '--color' then @color = true
when '+c', '--no-color' then @color = false
when '-2', '--256' then @ansi256 = true
when '+2', '--no-256' then @ansi256 = false
when '--black' then @black = true
when '--no-black' then @black = false
when '--mouse' then @mouse = true
when '--no-mouse' then @mouse = false
when '--reverse' then @reverse = true
when '--no-reverse' then @reverse = false
when '+s', '--no-sort' then @sort = nil
when '-1', '--select-1' then @select1 = true
when '+1', '--no-select-1' then @select1 = false
when '-0', '--exit-0' then @exit0 = true
when '+0', '--no-exit-0' then @exit0 = false
when '-q', '--query'
usage 1, 'query string required' unless query = argv.shift
@query = query
when /^-q(.*)$/, /^--query=(.*)$/
@query = $1
when '-f', '--filter'
usage 1, 'query string required' unless query = argv.shift
@filter = query
when /^-f(.*)$/, /^--filter=(.*)$/
@filter = $1
when '-n', '--nth'
usage 1, 'field expression required' unless nth = argv.shift
@nth = parse_nth nth
when /^-n([0-9,-\.]+)$/, /^--nth=([0-9,-\.]+)$/
@nth = parse_nth $1
when '--with-nth'
usage 1, 'field expression required' unless nth = argv.shift
@with_nth = parse_nth nth
when /^--with-nth=([0-9,-\.]+)$/
@with_nth = parse_nth $1
when '-d', '--delimiter'
usage 1, 'delimiter required' unless delim = argv.shift
@delim = FZF.build_delim_regex delim
when /^-d(.+)$/, /^--delimiter=(.+)$/
@delim = FZF.build_delim_regex $1
when '-s', '--sort'
usage 1, 'sort size required' unless sort = argv.shift
usage 1, 'invalid sort size' unless sort =~ /^[0-9]+$/
@sort = sort.to_i
when /^-s([0-9]+)$/, /^--sort=([0-9]+)$/
@sort = $1.to_i
when '--prompt'
usage 1, 'prompt string required' unless prompt = argv.shift
@prompt = prompt
when /^--prompt=(.*)$/
@prompt = $1
when '--print-query' then @print_query = true
when '--no-print-query' then @print_query = false
when '-e', '--extended-exact' then @extended = :exact
when '+e', '--no-extended-exact' then @extended = nil
when '--expect'
argv.shift
@expect = true
when /^--expect=(.*)$/
@expect = true
when '--toggle-sort', '--tiebreak', '--color', '--bind', '--history', '--history-size'
argv.shift
when '--tac', '--no-tac', '--sync', '--no-sync', '--hscroll', '--no-hscroll',
'--inline-info', '--no-inline-info', '--read0', '--cycle', /^--bind=(.*)$/,
/^--color=(.*)$/, /^--toggle-sort=(.*)$/, /^--tiebreak=(.*)$/, /^--history(-max)?=(.*)$/
# XXX
else
usage 1, "illegal option: #{o}"
end
end
@source = source.clone
@evt_mtx = Mutex.new
@cv = ConditionVariable.new
@events = {}
@new = []
@queue = Queue.new
@pending = nil
@rev_dir = @reverse ? -1 : 1
@stdout = $stdout.clone
unless @filter
# Shared variables: needs protection
@query ||= ''
@matches = []
@count = 0
@xcur = @query.length
@ycur = 0
@yoff = 0
@dirty = Set.new
@spinner = '-\|/-\|/'.split(//)
@selects = {} # ordered >= 1.9
@main = Thread.current
@plcount = 0
end
end
def parse_nth nth
ranges = nth.split(',').map { |expr|
x = proc { usage 1, "invalid field expression: #{expr}" }
first, second = expr.split('..', 2)
x.call if !first.empty? && first.to_i == 0 ||
second && !second.empty? && (second.to_i == 0 || second.include?('.'))
first = first.empty? ? 1 : first.to_i
second = case second
when nil then first
when '' then -1
else second.to_i
end
Range.new(*[first, second].map { |e| e > 0 ? e - 1 : e })
}
ranges == [0..-1] ? nil : ranges
end
def FZF.build_delim_regex delim
Regexp.compile(delim) rescue (delim = Regexp.escape(delim))
Regexp.compile "(?:.*?#{delim})|(?:.+?$)"
end
def burp string, orig = nil
@stdout.puts(orig || string.orig || string)
end
def start
if @filter
start_reader.join
filter_list @new
else
start_reader
query = get(:@query)
emit(:key) { [query, query.length] } unless empty = query.empty?
if @select1 || @exit0
start_search do |loaded, matches|
len = empty ? get(:@count) : matches.length
if loaded
if @select1 && len == 1
puts @query if @print_query
puts if @expect
burp(empty ? matches.first : matches.first.first)
exit 0
elsif @exit0 && len == 0
puts @query if @print_query
puts if @expect
exit 0
end
end
if loaded || len > 1
start_renderer
Thread.new { start_loop }
end
end
sleep
else
start_search
start_renderer
start_loop
end
end
end
def filter_list list
puts @filter if @print_query
matches = matcher.match(list, @filter, '', '')
if @sort && matches.length <= @sort
matches = FZF.sort(matches)
end
matches.each { |m| puts m.first }
end
def matcher
@matcher ||=
if @extended
ExtendedFuzzyMatcher.new @rxflag, @extended, @nth, @delim
else
FuzzyMatcher.new @rxflag, @nth, @delim
end
end
class << self
def version
File.open(__FILE__, 'r') do |f|
f.each_line do |line|
if line =~ /Version: (.*)/
$stdout.puts 'fzf ' << $1
exit
end
end
end
end
def sort list
list.sort_by { |tuple| rank tuple }
end
def rank tuple
line, offsets = tuple
matchlen = 0
pe = 0
offsets.sort.each do |pair|
b, e = pair
b = pe if pe > b
pe = e if e > pe
matchlen += e - b if e > b
end
[matchlen, line.length, line]
end
end
def usage x, message = nil
$stderr.puts message if message
$stderr.puts %[usage: fzf [options]
Search
-x, --extended Extended-search mode
-e, --extended-exact Extended-search mode (exact match)
-i Case-insensitive match (default: smart-case match)
+i Case-sensitive match
-n, --nth=N[,..] Comma-separated list of field index expressions
for limiting search scope. Each can be a non-zero
integer or a range expression ([BEGIN]..[END]).
--with-nth=N[,..] Transform the item using index expressions for search
-d, --delimiter=STR Field delimiter regex for --nth (default: AWK-style)
Search result
-s, --sort=MAX Maximum number of matched items to sort (default: 1000)
+s, --no-sort Do not sort the result. Keep the sequence unchanged.
Interface
-m, --multi Enable multi-select with tab/shift-tab
--no-mouse Disable mouse
+c, --no-color Disable colors
+2, --no-256 Disable 256-color
--black Use black background
--reverse Reverse orientation
--prompt=STR Input prompt (default: '> ')
Scripting
-q, --query=STR Start the finder with the given query
-1, --select-1 Automatically select the only match
-0, --exit-0 Exit immediately when there's no match
-f, --filter=STR Filter mode. Do not start interactive finder.
--print-query Print query as the first line
Environment variables
FZF_DEFAULT_COMMAND Default command to use when input is tty
FZF_DEFAULT_OPTS Default options (e.g. "-x -m --sort 10000")] + $/ + $/
exit x
end
def emit event
@evt_mtx.synchronize do
@events[event] = yield
@cv.broadcast
end
end
def max_items; C.lines - 2; end
def cursor_y offset = 0
@reverse ? (offset) : (C.lines - 1 - offset)
end
def cprint str, col
C.attron(col) do
addstr_safe str
end if str
end
def addstr_safe str
str = str.gsub("\0", '') rescue str
C.addstr str
end
def print_input
C.setpos cursor_y, 0
C.clrtoeol
cprint @prompt, color(:prompt, true)
C.attron(C::A_BOLD) do
C.addstr get(:@query)
end
end
def print_info msg = nil
C.setpos cursor_y(1), 0
C.clrtoeol
prefix =
if spin_char = call(:@spinner, :first)
cprint spin_char, color(:spinner, true)
' '
else
' '
end
C.attron color(:info, false) do
sync do
C.addstr "#{prefix}#{@matches.length}/#{@count}"
if (selected = @selects.length) > 0
C.addstr " (#{selected})"
end
end
C.addstr msg if msg
end
end
def refresh
query, xcur = geta(:@query, :@xcur)
C.setpos cursor_y, @prompt.length + width(query[0, xcur])
C.refresh
end
def ctrl char
char.to_s.ord - 'a'.ord + 1
end
def format line, limit, offsets
offsets ||= []
maxe = offsets.map { |e| e.last }.max || 0
# Overflow
if width(line) > limit
ewidth = width(line[0...maxe])
# Stri..
if ewidth <= limit - 2
line, _ = trim line, limit - 2, false
line << '..'
# ..ring
else
# ..ri..
line = line[0...maxe] + '..' if ewidth < width(line) - 2
line, diff = trim line, limit - 2, true
offsets = offsets.map { |pair|
b, e = pair
b += 2 - diff
e += 2 - diff
b = [2, b].max
[b, e]
}
line = '..' + line
end
end
tokens = []
index = 0
offsets.select { |pair| pair.first < pair.last }.
sort_by { |pair| pair }.each do |pair|
b, e = pair.map { |x| [index, x].max }
tokens << [line[index...b], false]
tokens << [line[b...e], true]
index = e
end
tokens << [line[index..-1], false] if index < line.length
tokens.reject { |pair| pair.first.empty? }
end
def print_item row, tokens, chosen, selected
# Cursor
C.setpos row, 0
C.clrtoeol
cprint chosen ? '>' : ' ', color(:cursor, true)
cprint selected ? '>' : ' ',
chosen ? color(:chosen) : (selected ? color(:selected, true) : 0)
# Highlighted item
C.attron color(:chosen, true) if chosen
tokens.each do |pair|
token, highlighted = pair
if highlighted
cprint token, color(chosen ? :match! : :match, chosen)
C.attron color(:chosen, true) if chosen
else
addstr_safe token
end
end
C.attroff color(:chosen, true) if chosen
end
AFTER_1_9 = RUBY_VERSION.split('.').map { |e| e.rjust(3, '0') }.join >= '001009'
if AFTER_1_9
@@wrx = Regexp.new '\p{Han}|\p{Katakana}|\p{Hiragana}|\p{Hangul}'
def width str
str.gsub(@@wrx, ' ').length rescue str.length
end
def trim str, len, left
width = width str
diff = 0
while width > len
width -= ((left ? str[0, 1] : str[-1, 1]) =~ @@wrx ? 2 : 1) rescue 1
str = left ? str[1..-1] : str[0...-1]
diff += 1
end
[str, diff]
end
else
def width str
str.length
end
def trim str, len, left
diff = str.length - len
if diff > 0
[left ? str[diff..-1] : str[0...-diff], diff]
else
[str, 0]
end
end
class ::String
def ord
self.unpack('c').first
end
end
class ::Fixnum
def ord
self
end
end
end
def init_screen
$stdout.reopen($stderr)
C.init_screen
C.mousemask C::ALL_MOUSE_EVENTS if @mouse
C.start_color
dbg =
if !@black && C.respond_to?(:use_default_colors)
C.use_default_colors
-1
else
C::COLOR_BLACK
end
C.raw
C.noecho
if @color
if @ansi256 && ENV['TERM'].to_s =~ /256/
C.init_pair 1, 110, dbg
C.init_pair 2, 108, dbg
C.init_pair 3, 254, 236
C.init_pair 4, 151, 236
C.init_pair 5, 148, dbg
C.init_pair 6, 144, dbg
C.init_pair 7, 161, 236
C.init_pair 8, 168, 236
else
C.init_pair 1, C::COLOR_BLUE, dbg
C.init_pair 2, C::COLOR_GREEN, dbg
C.init_pair 3, C::COLOR_YELLOW, C::COLOR_BLACK
C.init_pair 4, C::COLOR_GREEN, C::COLOR_BLACK
C.init_pair 5, C::COLOR_GREEN, dbg
C.init_pair 6, C::COLOR_WHITE, dbg
C.init_pair 7, C::COLOR_RED, C::COLOR_BLACK
C.init_pair 8, C::COLOR_MAGENTA, C::COLOR_BLACK
end
def self.color sym, bold = false
C.color_pair([:prompt, :match, :chosen, :match!,
:spinner, :info, :cursor, :selected].index(sym) + 1) |
(bold ? C::A_BOLD : 0)
end
else
def self.color sym, bold = false
case sym
when :chosen
bold ? C::A_REVERSE : 0
when :match
C::A_UNDERLINE
when :match!
C::A_REVERSE | C::A_UNDERLINE
else
0
end | (bold ? C::A_BOLD : 0)
end
end
C.refresh
end
def start_reader
stream =
if @source.tty?
default_command = ENV['FZF_DEFAULT_COMMAND']
if default_command && !default_command.empty?
IO.popen(default_command)
elsif !`which find`.empty?
IO.popen("find * -path '*/\\.*' -prune -o -type f -print -o -type l -print 2> /dev/null")
else
exit 1
end
else
@source
end
Thread.new do
if @with_nth
while line = stream.gets
emit(:new) { @new << transform(line) }
end
else
while line = stream.gets
emit(:new) { @new << line.chomp }
end
end
emit(:loaded) { true }
@spinner.clear if @spinner
end
end
def transform line
line = line.chomp
mut = (line =~ / $/ ? line : line + ' ').
tokenize(@delim, @with_nth).map { |e| e.last }.join('').sub(/ *$/, '')
mut.orig = line
mut
end
def start_search &callback
Thread.new do
lists = []
events = {}
fcache = {}
q = ''
delay = -5
begin
while true
@evt_mtx.synchronize do
while true
events.merge! @events
if @events.empty? # No new events
@cv.wait @evt_mtx
next
end
@events.clear
break
end
if events[:new]
lists << @new
set(:@count) { |c| c + @new.length }
set(:@spinner) { |spinner|
if e = spinner.shift
spinner.push e
end; spinner
}
@new = []
fcache.clear
end
end#mtx
new_search = events[:key] || events.delete(:new)
user_input = events[:key]
progress = 0
started_at = Time.now
if updated = new_search && !lists.empty?
q, cx = events.delete(:key) || [q, 0]
empty = matcher.empty?(q)
unless matches = fcache[q]
found = []
skip = false
cnt = 0
lists.each do |list|
cnt += list.length
skip = @evt_mtx.synchronize { @events[:key] }
break if skip
if !empty && (progress = 100 * cnt / get(:@count)) < 100 && Time.now - started_at > 0.5
render { print_info " (#{progress}%)" }
end
found.concat(q.empty? ? list :
matcher.match(list, q, q[0, cx], q[cx..-1]))
end
if skip
sleep 0.1
next
end
matches = @sort ? found : found.reverse
if !empty && @sort && matches.length <= @sort
matches = FZF.sort(matches)
end
fcache[q] = matches
end
# Atomic update
set(:@matches, matches)
end#new_search
callback = nil if callback &&
(updated || events[:loaded]) &&
callback.call(events[:loaded], matches)
# This small delay reduces the number of partial lists
sleep((delay = [20, delay + 5].min) * 0.01) unless user_input
update_list new_search
end#while
rescue Exception => e
@main.raise e
end
end
end
def pick
sync do
item = @matches[@ycur]
item.is_a?(Array) ? item[0] : item
end
end
def constrain offset, cursor, count, height
original = [offset, cursor]
diffpos = cursor - offset
# Constrain cursor
cursor = [0, [cursor, count - 1].min].max
# Ceil
if cursor > offset + (height - 1)
offset = cursor - (height - 1)
# Floor
elsif offset > cursor
offset = cursor
end
# Adjustment
if count - offset < height
offset = [0, count - height].max
cursor = [0, [offset + diffpos, count - 1].min].max
end
[[offset, cursor] != original, offset, cursor]
end
def update_list wipe
render do
pos, items = sync {
changed, @yoff, @ycur =
constrain(@yoff, @ycur, @matches.length, max_items)
wipe ||= changed
[@ycur - @yoff, @matches[@yoff, max_items]]
}
# Wipe
if items.length < @plcount
@plcount.downto(items.length) do |idx|
C.setpos cursor_y(idx + 2), 0
C.clrtoeol
end
end
@plcount = items.length
dirty = Set[pos]
set(:@dirty) do |vs|
dirty.merge vs
Set.new
end
items.each_with_index do |item, idx|
next unless wipe || dirty.include?(idx)
row = cursor_y(idx + 2)
chosen = idx == pos
selected = @selects.include?([*item][0])
line, offsets = item
tokens = format line, C.cols - 3, offsets
print_item row, tokens, chosen, selected
end
print_info
print_input
end
end
def start_renderer
init_screen
Thread.new do
begin
while blk = @queue.shift
blk.call
refresh
end
rescue Exception => e
@main.raise e
end
end
end
def render &blk
@queue.push blk
nil
end
def vselect &prc
sync do
@dirty << @ycur - @yoff
@ycur = prc.call @ycur
end
update_list false
end
def num_unicode_bytes chr
# http://en.wikipedia.org/wiki/UTF-8
if chr & 0b10000000 > 0
bytes = 0
7.downto(2) do |shift|
break if (chr >> shift) & 0x1 == 0
bytes += 1
end
bytes
else
1
end
end
def read_nb chars = 1, default = nil, tries = 10
tries.times do |_|
begin
return @tty.read_nonblock(chars).ord
rescue Exception
sleep 0.01
end
end
default
end
def read_nbs
ords = []
while ord = read_nb
ords << ord
end
ords
end
def get_mouse
case ord = read_nb
when 32, 36, 40, 48, # mouse-down / shift / cmd / ctrl
35, 39, 43, 51 # mouse-up / shift / cmd / ctrl
x = read_nb - 33
y = read_nb - 33
{ :event => (ord % 2 == 0 ? :click : :release),
:x => x, :y => y, :shift => ord >= 36 }
when 96, 100, 104, 112, # scroll-up / shift / cmd / ctrl
97, 101, 105, 113 # scroll-down / shift / cmd / ctrl
read_nb(2)
{ :event => :scroll, :diff => (ord % 2 == 0 ? -1 : 1), :shift => ord >= 100 }
else
# e.g. 40, 43, 104, 105
read_nb(2)
nil
end
end
def get_input actions
@tty ||=
begin
require 'io/console'
IO.console
rescue LoadError
IO.open(IO.sysopen('/dev/tty'), 'r')
end
if pending = @pending
@pending = nil
return pending
end
str = ''
while true
ord =
if str.empty?
@tty.getc.ord
else
begin
ord = @tty.read_nonblock(1).ord
if (nb = num_unicode_bytes(ord)) > 1
ords = [ord]
(nb - 1).times do |_|
ords << @tty.read_nonblock(1).ord
end
# UTF-8 TODO Ruby 1.8
ords.pack('C*').force_encoding('UTF-8')
else
ord
end
rescue Exception
return str
end
end
ord =
case read_nb(1, :esc)
when 91, 79
case read_nb(1, nil)
when 68 then ctrl(:b)
when 67 then ctrl(:f)
when 66 then ctrl(:j)
when 65 then ctrl(:k)
when 90 then :stab
when 50 then read_nb; :ins
when 51 then read_nb; :del
when 53 then read_nb; :pgup
when 54 then read_nb; :pgdn
when 49
case read_nbs
when [59, 50, 68] then ctrl(:a)
when [59, 50, 67] then ctrl(:e)
when [59, 53, 68] then :alt_b
when [59, 53, 67] then :alt_f
when [126] then ctrl(:a)
end
when 52 then read_nb; ctrl(:e)
when 72 then ctrl(:a)
when 70 then ctrl(:e)
when 77
get_mouse
end
when 'b', 98 then :alt_b
when 'd', 100 then :alt_d
when 'f', 102 then :alt_f
when :esc then :esc
when 127 then :alt_bs
else next
end if ord == 27
return ord if ord.nil? || ord.is_a?(Hash)
if actions.has_key?(ord)
if str.empty?
return ord
else
@pending = ord
return str
end
else
unless ord.is_a? String
ord = [ord].pack('U*')
end
str << ord if ord =~ /[[:print:]]/
end
end
end
class MouseEvent
DOUBLE_CLICK_INTERVAL = 0.5
attr_reader :v
def initialize v = nil
@c = 0
@v = v
@t = Time.at 0
end
def v= v
@c = (@v == v && within?) ? @c + 1 : 0
@v = v
@t = Time.now
end
def double? v
@c == 1 && @v == v && within?
end
def within?
(Time.now - @t) < DOUBLE_CLICK_INTERVAL
end
end
def start_loop
got = nil
begin
input = call(:@query, :dup)
cursor = input.length
yanked = ''
mouse_event = MouseEvent.new
backword = proc {
cursor = (input[0, cursor].rindex(/[^[:alnum:]][[:alnum:]]/) || -1) + 1
nil
}
forward = proc {
cursor += (input[cursor..-1].index(/([[:alnum:]][^[:alnum:]])|(.$)/) || -1) + 1
nil
}
rubout = proc { |regex|
pcursor = cursor
cursor = (input[0, cursor].rindex(regex) || -1) + 1
if pcursor > cursor
yanked = input[cursor...pcursor]
input = input[0...cursor] + input[pcursor..-1]
end
}
actions = {
:esc => proc { exit 1 },
ctrl(:d) => proc {
if input.empty?
exit 1
elsif cursor < input.length
input = input[0...cursor] + input[(cursor + 1)..-1]
end
},
ctrl(:m) => proc {
got = pick
exit 0
},
ctrl(:u) => proc {
yanked = input[0...cursor] if cursor > 0
input = input[cursor..-1]
cursor = 0
},
ctrl(:a) => proc { cursor = 0; nil },
ctrl(:e) => proc { cursor = input.length; nil },
ctrl(:j) => proc { vselect { |v| v - @rev_dir } },
ctrl(:k) => proc { vselect { |v| v + @rev_dir } },
ctrl(:w) => proc { rubout.call /\s\S/ },
ctrl(:y) => proc { actions[:default].call yanked },
ctrl(:h) => proc { input[cursor -= 1] = '' if cursor > 0 },
ctrl(:i) => proc { |o|
if @multi && sel = pick
sync do
if @selects.has_key? sel
@selects.delete sel
else
@selects[sel] = sel.orig
end
end
vselect { |v| v + case o
when :stab then 1
when :sclick then 0
else -1
end * @rev_dir }
end
},
ctrl(:b) => proc { cursor = [0, cursor - 1].max; nil },
ctrl(:f) => proc { cursor = [input.length, cursor + 1].min; nil },
ctrl(:l) => proc { render { C.clear; C.refresh }; update_list true },
:del => proc { input[cursor] = '' if input.length > cursor },
:pgup => proc { vselect { |v| v + @rev_dir * (max_items - 1) } },
:pgdn => proc { vselect { |v| v - @rev_dir * (max_items - 1) } },
:alt_bs => proc { rubout.call /[^[:alnum:]][[:alnum:]]/ },
:alt_b => proc { backword.call },
:alt_d => proc {
pcursor = cursor
forward.call
if cursor > pcursor
yanked = input[pcursor...cursor]
input = input[0...pcursor] + input[cursor..-1]
cursor = pcursor
end
},
:alt_f => proc {
forward.call
},
:default => proc { |val|
case val
when String
input.insert cursor, val
cursor += val.length
when Hash
event = val[:event]
case event
when :click, :release
x, y, shift = val.values_at :x, :y, :shift
y = @reverse ? (C.lines - 1 - y) : y
if y == C.lines - 1
cursor = [0, [input.length, x - @prompt.length].min].max
elsif x > 1 && y <= max_items
tv = get(:@yoff) + max_items - y - 1
case event
when :click
vselect { |_| tv }
actions[ctrl(:i)].call(:sclick) if shift
mouse_event.v = tv
when :release
if !shift && mouse_event.double?(tv)
actions[ctrl(:m)].call
end
end
end
when :scroll
diff, shift = val.values_at :diff, :shift
actions[ctrl(:i)].call(:sclick) if shift
actions[ctrl(diff > 0 ? :j : :k)].call
end
nil
end
}
}
actions[ctrl(:p)] = actions[ctrl(:k)]
actions[ctrl(:n)] = actions[ctrl(:j)]
actions[:stab] = actions[ctrl(:i)]
actions[127] = actions[ctrl(:h)]
actions[ctrl(:q)] = actions[ctrl(:g)] = actions[ctrl(:c)] = actions[:esc]
while true
set(:@xcur, cursor)
render { print_input }
if key = get_input(actions)
upd = actions.fetch(key, actions[:default]).call(key)
# Dispatch key event
emit(:key) { [set(:@query, input.dup), cursor] } if upd
end
end
ensure
C.close_screen
q, selects = geta(:@query, :@selects)
@stdout.puts q if @print_query
@stdout.puts if @expect
if got
if selects.empty?
burp got
else
selects.each do |sel, orig|
burp sel, orig
end
end
end
end
end
class Matcher
class MatchData
def initialize n
@n = n
end
def offset _
@n
end
end
def initialize nth, delim
@nth = nth
@delim = delim
@tokens_cache = {}
end
def tokenize str
@tokens_cache[str] ||= str.tokenize(@delim, @nth)
end
def do_match str, pat
if @nth
tokenize(str).each do |pair|
prefix_length, token = pair
if md = token.match(pat) rescue nil
return MatchData.new(md.offset(0).map { |o| o + prefix_length })
end
end
nil
else
str.match(pat) rescue nil
end
end
end
class FuzzyMatcher < Matcher
attr_reader :caches, :rxflag
def initialize rxflag, nth = nil, delim = nil
super nth, delim
@caches = Hash.new { |h, k| h[k] = {} }
@regexp = {}
@rxflag = rxflag
end
def empty? q
q.empty?
end
def rxflag_for q
@rxflag || (q =~ /[A-Z]/ ? 0 : Regexp::IGNORECASE)
end
def fuzzy_regex q
@regexp[q] ||= begin
q = q.downcase if @rxflag == Regexp::IGNORECASE
Regexp.new(q.split(//).inject('') { |sum, e|
e = Regexp.escape e
sum << (e.length > 1 ? "(?:#{e}).*?" : # FIXME: not equivalent
"#{e}[^#{e}]*?")
}, rxflag_for(q))
end
end
def match list, q, prefix, suffix
regexp = fuzzy_regex q
cache = @caches[list.object_id]
prefix_cache = nil
(prefix.length - 1).downto(1) do |len|
break if prefix_cache = cache[prefix[0, len]]
end
suffix_cache = nil
0.upto(suffix.length - 1) do |idx|
break if suffix_cache = cache[suffix[idx..-1]]
end unless suffix.empty?
partial_cache = [prefix_cache,
suffix_cache].compact.sort_by { |e| e.length }.first
cache[q] ||= (partial_cache ?
partial_cache.map { |e| e.first } : list).map { |line|
# Ignore errors: e.g. invalid byte sequence in UTF-8
md = do_match(line, regexp)
md && [line, [md.offset(0)]]
}.compact
end
end
class ExtendedFuzzyMatcher < FuzzyMatcher
def initialize rxflag, mode = :fuzzy, nth = nil, delim = nil
super rxflag, nth, delim
@regexps = {}
@mode = mode
end
def empty? q
parse(q).empty?
end
def parse q
q = q.strip
@regexps[q] ||= q.split(/\s+/).map { |w|
invert =
if w =~ /^!/
w = w[1..-1]
true
end
[ @regexp[w] ||=
case w
when ''
nil
when /^\^(.*)\$$/
Regexp.new('^' << Regexp.escape($1) << '$', rxflag_for(w))
when /^'/
if @mode == :fuzzy && w.length > 1
exact_regex w[1..-1]
elsif @mode == :exact
exact_regex w
end
when /^\^/
w.length > 1 ?
Regexp.new('^' << Regexp.escape(w[1..-1]), rxflag_for(w)) : nil
when /\$$/
w.length > 1 ?
Regexp.new(Regexp.escape(w[0..-2]) << '$', rxflag_for(w)) : nil
else
@mode == :fuzzy ? fuzzy_regex(w) : exact_regex(w)
end, invert ]
}.select { |pair| pair.first }
end
def exact_regex w
Regexp.new(Regexp.escape(w), rxflag_for(w))
end
def match list, q, prefix, suffix
regexps = parse q
# Look for prefix cache
cache = @caches[list.object_id]
prefix = prefix.strip.sub(/\$\S*$/, '').sub(/(^|\s)!\S*$/, '')
prefix_cache = nil
(prefix.length - 1).downto(1) do |len|
break if prefix_cache = cache[Set[@regexps[prefix[0, len]]]]
end
cache[Set[regexps]] ||= (prefix_cache ?
prefix_cache.map { |e| e.first } :
list).map { |line|
offsets = []
regexps.all? { |pair|
regexp, invert = pair
md = do_match(line, regexp)
if md && !invert
offsets << md.offset(0)
elsif !md && invert
true
end
} && [line, offsets]
}.select { |e| e }
end
end
end#FZF
FZF.new(ARGV, $stdin).start if ENV.fetch('FZF_EXECUTABLE', '1') == '1'
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