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# frozen_string_literal: true
module Unicode
class DisplayWidth
module EmojiSupport
# Tries to find out which terminal emulator is used to
# set emoji: config to best suiting value
#
# Please also see section in README.md and
# misc/terminal-emoji-width.rb
#
# Please note: Many terminals do not set any ENV vars,
# maybe CSI queries can help?
def self.recommended
@recommended ||= _recommended
end
def self._recommended
if ENV["CI"]
return :rqi
end
case ENV["TERM_PROGRAM"]
when "iTerm.app"
return :all
when "Apple_Terminal"
return :rgi_at
when "WezTerm"
return :all_no_vs16
end
case ENV["TERM"]
when "contour","foot"
# konsole: all, how to detect?
return :all
when /kitty/
return :vs16
end
if ENV["WT_SESSION"] # Windows Terminal
return :vs16
end
# As of last time checked: gnome-terminal, vscode, alacritty
:none
end
# Maybe: Implement something like https://github.com/jquast/ucs-detect
# which uses the terminal cursor to check for best support level
# at runtime
# def self.detect!
# end
end
end
end
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