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# frozen_string_literal: true
module Vedeu
module Presentation
# Converts the style value or value collection into a terminal
# escape sequence. Unrecognised values are discarded- an empty
# string is returned.
#
# Vedeu has a range of symbol styles which are compatible with
# most terminals which are ANSI compatible. Like colours, they can
# be defined in either interfaces, for specific lines or within
# streams. Styles are applied as encountered.
#
# @see Vedeu::EscapeSequences::Esc
#
class Style
class << self
extend Forwardable
def_delegators Vedeu::Coercers::Style,
:coerce
end # Eigenclass
include Vedeu::Common
# @!attribute [rw] value
# @return [String|Symbol]
attr_accessor :value
# Return a new instance of Vedeu::Presentation::Style.
#
# @param value [Array<String|Symbol>|String|Symbol]
# The style value or a collection of values.
# @return [Vedeu::Presentation::Style]
def initialize(value = nil)
@value = value
end
# Return an attributes hash for this class.
#
# @return [Hash<Symbol => Array<String|Symbol>|String|Symbol>]
def attributes
{
style: value,
}
end
# An object is equal when its values are the same.
#
# @param other [void]
# @return [Boolean]
def eql?(other)
self.class.equal?(other.class) && value == other.value
end
alias == eql?
# @return [String]
def to_ast
':s'
end
# Return the terminal escape sequences after converting the
# style or styles.
#
# @return [String]
def to_s
return '' unless present?(value)
@sequences ||= Array(value).flat_map { |v| Vedeu.esc.string(v) }.join
end
alias escape_sequences to_s
alias to_str to_s
end # Style
end # Presentation
end # Vedeu
Version data entries
11 entries across 11 versions & 1 rubygems