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|
#!/usr/bin/env ruby
#
# usage: ./preview.rb FILENAME[:LINE][:IGNORED]
require 'open3'
require 'shellwords'
COMMAND = ENV.fetch(
'FZF_PREVIEW_COMMAND',
%[bat --style=numbers --color=always {} || highlight -O ansi -l {} || coderay {} || rougify {} || cat {}]
)
ANSI = /\x1b\[[0-9;]*m/
REVERSE = "\x1b[7m"
RESET = "\x1b[m"
def usage
puts "usage: #$0 FILENAME[:LINENO][:IGNORED]"
exit 1
end
usage if ARGV.empty?
file, center, extra = ARGV.first.split(':')
if ARGV.first =~ /^[A-Z]:\\/
file << ':' + center
center = extra
end
usage unless file
path = File.expand_path(file)
unless File.readable? path
puts "File not found: #{file}"
exit 1
end
if `file --dereference --mime "#{file}"` =~ /binary/
puts "#{file} is a binary file"
exit 0
end
center = (center || 0).to_i
height =
if ENV['LINES']
ENV['LINES'].to_i
else
File.readable?('/dev/tty') ? `stty size < /dev/tty`.split.first.to_i : 40
end
offset = [1, center - height / 3].max
Open3.popen3(COMMAND.gsub('{}', Shellwords.shellescape(path))) do |_in, out, _err|
out.each_line.drop(offset - 1).take(height).each_with_index do |line, lno|
if lno + offset == center
puts REVERSE + line.chomp.gsub(ANSI) { |m| m + REVERSE } + RESET
else
puts line
end
end
end
print RESET
|
