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