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|
class JsRegex
module Converter
#
# Passed among Converters to globalize basic status data.
#
# The Converters themselves are stateless.
#
class Context
attr_reader :capturing_group_count,
:case_insensitive_root,
:in_atomic_group,
:warnings
def initialize(case_insensitive_root: false, target: nil)
self.added_capturing_groups_after_group = Hash.new(0)
self.capturing_group_count = 0
self.warnings = []
self.required_options_hash = {}
self.case_insensitive_root = case_insensitive_root
self.target = target
end
# target context
def es_2015_or_higher?
target >= Target::ES2015
end
def es_2018_or_higher?
target >= Target::ES2018
end
# these methods allow appending options to the final Conversion output
def enable_u_option
return false unless es_2015_or_higher?
required_options_hash['u'] = true
end
def required_options
required_options_hash.keys
end
# group context
def capture_group
self.capturing_group_count = capturing_group_count + 1
end
def start_atomic_group
self.in_atomic_group = true
end
def end_atomic_group
self.in_atomic_group = false
end
def increment_local_capturing_group_count
added_capturing_groups_after_group[original_capturing_group_count] += 1
capture_group
end
# takes and returns 1-indexed group positions.
# new is different from old if capturing groups were added in between.
def new_capturing_group_position(old_position)
increment = 0
added_capturing_groups_after_group.each do |after_n_groups, count|
increment += count if after_n_groups < old_position
end
old_position + increment
end
def original_capturing_group_count
capturing_group_count - total_added_capturing_groups
end
private
attr_accessor :added_capturing_groups_after_group,
:required_options_hash,
:target
attr_writer :capturing_group_count,
:case_insensitive_root,
:in_atomic_group,
:warnings
def total_added_capturing_groups
added_capturing_groups_after_group.values.inject(0, &:+)
end
end
end
end
|
