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# frozen_string_literal: true
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module Sass
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class Compiler
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class Session
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# The {Protofier} class.
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#
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# It converts Pure Ruby types and Protobuf Ruby types.
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class Protofier
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def initialize(function_registry)
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@function_registry = function_registry
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end
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def to_proto(obj)
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case obj
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when Sass::Value::String
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EmbeddedProtocol::Value.new(
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string: EmbeddedProtocol::Value::String.new(
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text: obj.text.to_str,
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quoted: obj.quoted?
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)
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)
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when Sass::Value::Number
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EmbeddedProtocol::Value.new(
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number: Number.to_proto(obj)
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)
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when Sass::Value::Color
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EmbeddedProtocol::Value.new(
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color: EmbeddedProtocol::Value::Color.new(
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channel1: obj.send(:channel0_or_nil),
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channel2: obj.send(:channel1_or_nil),
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channel3: obj.send(:channel2_or_nil),
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alpha: obj.send(:alpha_or_nil),
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space: obj.space
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)
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)
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when Sass::Value::ArgumentList
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if obj.instance_variable_get(:@compile_context) == @function_registry.compile_context
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EmbeddedProtocol::Value.new(
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argument_list: EmbeddedProtocol::Value::ArgumentList.new(
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id: obj.instance_variable_get(:@id)
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)
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)
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else
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EmbeddedProtocol::Value.new(
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argument_list: EmbeddedProtocol::Value::ArgumentList.new(
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contents: obj.to_a.map { |element| to_proto(element) },
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keywords: obj.keywords.each_with_object({}) { |(key, value), hash| hash[key.to_s] = to_proto(value) },
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separator: ListSeparator.to_proto(obj.separator)
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)
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)
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end
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when Sass::Value::List
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EmbeddedProtocol::Value.new(
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list: EmbeddedProtocol::Value::List.new(
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contents: obj.to_a.map { |element| to_proto(element) },
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separator: ListSeparator.to_proto(obj.separator),
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has_brackets: obj.bracketed?
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)
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)
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when Sass::Value::Map
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EmbeddedProtocol::Value.new(
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map: EmbeddedProtocol::Value::Map.new(
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entries: obj.contents.map do |key, value|
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EmbeddedProtocol::Value::Map::Entry.new(
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key: to_proto(key),
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value: to_proto(value)
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)
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end
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)
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)
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when Sass::Value::Function
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if obj.instance_variable_defined?(:@id)
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EmbeddedProtocol::Value.new(
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compiler_function: EmbeddedProtocol::Value::CompilerFunction.new(
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id: assert_compiler_value(obj).instance_variable_get(:@id)
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)
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)
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else
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EmbeddedProtocol::Value.new(
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host_function: EmbeddedProtocol::Value::HostFunction.new(
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id: @function_registry.register(obj.callback),
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signature: obj.signature
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)
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)
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end
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when Sass::Value::Mixin
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EmbeddedProtocol::Value.new(
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compiler_mixin: EmbeddedProtocol::Value::CompilerMixin.new(
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id: assert_compiler_value(obj).instance_variable_get(:@id)
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)
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)
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when Sass::Value::Calculation
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EmbeddedProtocol::Value.new(
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calculation: Calculation.to_proto(obj)
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)
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when Sass::Value::Boolean
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EmbeddedProtocol::Value.new(
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singleton: obj.value ? :TRUE : :FALSE
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)
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when Sass::Value::Null
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EmbeddedProtocol::Value.new(
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singleton: :NULL
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)
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else
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raise Sass::ScriptError, "Unknown Sass::Value #{obj}"
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end
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end
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def from_proto(proto)
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oneof = proto.value
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obj = proto.public_send(oneof)
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case oneof
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when :string
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Sass::Value::String.new(
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obj.text,
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quoted: obj.quoted
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)
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when :number
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Number.from_proto(obj)
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when :color
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Sass::Value::Color.send(
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:for_space,
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obj.space,
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obj.has_channel1? ? obj.channel1 : nil,
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obj.has_channel2? ? obj.channel2 : nil,
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obj.has_channel3? ? obj.channel3 : nil,
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obj.has_alpha? ? obj.alpha : nil
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)
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when :argument_list
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compiler_value(
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Sass::Value::ArgumentList.new(
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obj.contents.map do |element|
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from_proto(element)
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end,
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obj.keywords.to_enum.with_object({}) do |(key, value), hash|
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hash[key.to_sym] = from_proto(value)
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end,
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ListSeparator.from_proto(obj.separator)
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),
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obj.id
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)
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when :list
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Sass::Value::List.new(
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obj.contents.map do |element|
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from_proto(element)
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end,
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separator: ListSeparator.from_proto(obj.separator),
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bracketed: obj.has_brackets
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)
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when :map
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Sass::Value::Map.new(
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obj.entries.to_enum.with_object({}) do |entry, hash|
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hash[from_proto(entry.key)] = from_proto(entry.value)
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end
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)
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when :compiler_function
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compiler_value(Sass::Value::Function.allocate, obj.id)
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when :host_function
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raise Sass::ScriptError, 'The compiler may not send Value.host_function to host'
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when :compiler_mixin
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compiler_value(Sass::Value::Mixin.allocate, obj.id)
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when :calculation
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Calculation.from_proto(obj)
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when :singleton
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case obj
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when :TRUE
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Sass::Value::Boolean::TRUE
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when :FALSE
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Sass::Value::Boolean::FALSE
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when :NULL
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Sass::Value::Null::NULL
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else
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raise Sass::ScriptError, "Unknown Value.singleton #{obj}"
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end
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else
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raise Sass::ScriptError, "Unknown Value.value #{obj}"
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end
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end
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private
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def assert_compiler_value(value)
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unless value.instance_variable_get(:@compile_context) == @function_registry.compile_context
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raise Sass::ScriptError, "Value #{value} does not belong to this compilation"
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end
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value
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end
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def compiler_value(value, id)
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value.instance_variable_set(:@compile_context, @function_registry.compile_context)
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value.instance_variable_set(:@id, id)
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value
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end
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# The {Number} Protofier.
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module Number
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module_function
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def to_proto(obj)
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EmbeddedProtocol::Value::Number.new(
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value: obj.value.to_f,
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numerators: obj.numerator_units,
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denominators: obj.denominator_units
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)
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end
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def from_proto(obj)
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Sass::Value::Number.new(
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obj.value, {
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numerator_units: obj.numerators.to_a,
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denominator_units: obj.denominators.to_a
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}
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)
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end
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end
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private_constant :Number
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# The {Calculation} Protofier.
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module Calculation
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module_function
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def to_proto(obj)
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EmbeddedProtocol::Value::Calculation.new(
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name: obj.name,
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arguments: obj.arguments.map { |argument| CalculationValue.to_proto(argument) }
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)
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end
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def from_proto(obj)
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Sass::Value::Calculation.send(
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:new,
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obj.name,
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obj.arguments.map { |argument| CalculationValue.from_proto(argument) }
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)
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end
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end
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private_constant :Calculation
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# The {CalculationValue} Protofier.
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module CalculationValue
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module_function
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def to_proto(value)
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case value
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when Sass::Value::Number
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EmbeddedProtocol::Value::Calculation::CalculationValue.new(
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number: Number.to_proto(value)
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)
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when Sass::Value::Calculation
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EmbeddedProtocol::Value::Calculation::CalculationValue.new(
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calculation: Calculation.to_proto(value)
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)
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when Sass::Value::String
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EmbeddedProtocol::Value::Calculation::CalculationValue.new(
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string: value.text
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)
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when Sass::CalculationValue::CalculationOperation
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EmbeddedProtocol::Value::Calculation::CalculationValue.new(
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operation: EmbeddedProtocol::Value::Calculation::CalculationOperation.new(
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operator: CalculationOperator.to_proto(value.operator),
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left: to_proto(value.left),
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right: to_proto(value.right)
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)
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)
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else
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raise Sass::ScriptError, "Unknown CalculationValue #{value}"
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end
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end
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def from_proto(value)
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oneof = value.value
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obj = value.public_send(oneof)
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case oneof
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when :number
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Number.from_proto(obj)
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when :calculation
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Calculation.from_proto(obj)
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when :string
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Sass::Value::String.new(obj, quoted: false)
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when :operation
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Sass::CalculationValue::CalculationOperation.new(
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CalculationOperator.from_proto(obj.operator),
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from_proto(obj.left),
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from_proto(obj.right)
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)
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else
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raise Sass::ScriptError, "Unknown CalculationValue #{value}"
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end
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end
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end
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private_constant :CalculationValue
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# The {CalculationOperator} Protofier.
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module CalculationOperator
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module_function
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def to_proto(operator)
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case operator
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when '+'
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:PLUS
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when '-'
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:MINUS
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when '*'
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:TIMES
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when '/'
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:DIVIDE
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else
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raise Sass::ScriptError, "Unknown CalculationOperator #{separator}"
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end
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end
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def from_proto(operator)
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case operator
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when :PLUS
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'+'
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when :MINUS
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'-'
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when :TIMES
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'*'
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when :DIVIDE
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'/'
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else
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raise Sass::ScriptError, "Unknown CalculationOperator #{separator}"
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end
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end
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end
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private_constant :CalculationOperator
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# The {ListSeparator} Protofier.
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module ListSeparator
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module_function
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def to_proto(separator)
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case separator
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when ','
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:COMMA
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when ' '
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:SPACE
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when '/'
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:SLASH
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when nil
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:UNDECIDED
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else
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raise Sass::ScriptError, "Unknown ListSeparator #{separator}"
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end
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end
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def from_proto(separator)
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case separator
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when :COMMA
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','
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when :SPACE
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' '
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when :SLASH
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'/'
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when :UNDECIDED
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nil
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else
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raise Sass::ScriptError, "Unknown ListSeparator #{separator}"
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end
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end
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end
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private_constant :ListSeparator
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end
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private_constant :Protofier
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end
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end
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end
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