37 lines
1.4 KiB
Ruby
37 lines
1.4 KiB
Ruby
# heavily based on Masao Mutoh's gettext String interpolation extension
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# http://github.com/mutoh/gettext/blob/f6566738b981fe0952548c421042ad1e0cdfb31e/lib/gettext/core_ext/string.rb
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module I18n
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INTERPOLATION_PATTERN = Regexp.union(
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/%%/,
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/%\{(\w+)\}/, # matches placeholders like "%{foo}"
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/%<(\w+)>(.*?\d*\.?\d*[bBdiouxXeEfgGcps])/ # matches placeholders like "%<foo>.d"
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)
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class << self
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# Return String or raises MissingInterpolationArgument exception.
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# Missing argument's logic is handled by I18n.config.missing_interpolation_argument_handler.
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def interpolate(string, values)
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raise ReservedInterpolationKey.new($1.to_sym, string) if string =~ RESERVED_KEYS_PATTERN
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raise ArgumentError.new('Interpolation values must be a Hash.') unless values.kind_of?(Hash)
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interpolate_hash(string, values)
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end
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def interpolate_hash(string, values)
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string.gsub(INTERPOLATION_PATTERN) do |match|
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if match == '%%'
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'%'
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else
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key = ($1 || $2 || match.tr("%{}", "")).to_sym
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value = if values.key?(key)
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values[key]
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else
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config.missing_interpolation_argument_handler.call(key, values, string)
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end
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value = value.call(values) if value.respond_to?(:call)
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$3 ? sprintf("%#{$3}", value) : value
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end
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end
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end
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end
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end
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