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# frozen_string_literal: true
module Browser
class InternetExplorer < Base
# https://msdn.microsoft.com/en-us/library/ms537503(v=vs.85).aspx#TriToken
TRIDENT_MAPPING = {
"4.0" => "8",
"5.0" => "9",
"6.0" => "10",
"7.0" => "11",
"8.0" => "12"
}.freeze
def id
:ie
end
def name
"Internet Explorer"
end
def full_version
"#{ie_version}.0"
end
def msie_full_version
(ua.match(%r{MSIE ([\d.]+)|Trident/.*?; rv:([\d.]+)}) &&
(Regexp.last_match(1) || Regexp.last_match(2))) ||
"0.0"
end
def msie_version
msie_full_version.split(".").first
end
def match?
msie? || modern_ie?
end
# Detect if IE is running in compatibility mode.
def compatibility_view?
trident_version && msie_version.to_i < (trident_version.to_i + 4)
end
private def ie_version
TRIDENT_MAPPING[trident_version] || msie_version
end
# Return the trident version.
private def trident_version
ua.match(%r{Trident/([0-9.]+)}) && Regexp.last_match(1)
end
private def msie?
ua.include?("MSIE") && !ua.include?("Opera")
end
private def modern_ie?
ua.match?(%r{Trident/.*?; rv:(.*?)})
end
end
end
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