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Contents
# encoding: utf-8
module Synvert::Core
# Condition checks if rules matches.
class Rewriter::Condition
# Initialize a condition.
#
# @param instance [Synvert::Core::Rewriter::Instance]
# @param rules [Hash]
# @param block [Block]
# @return [Synvert::Core::Rewriter::Condition]
def initialize(instance, rules, &block)
@instance = instance
@rules = rules
@block = block
end
# If condition matches, run the block code.
def process
@instance.instance_eval &@block if match?
end
end
# IfExistCondition checks if matching node exists in the node children.
class Rewriter::IfExistCondition < Rewriter::Condition
# check if any child node matches the rules.
def match?
match = false
@instance.current_node.recursive_children do |child_node|
match = match || (child_node && child_node.match?(@rules))
end
match
end
end
# UnlessExistCondition checks if matching node doesn't exist in the node children.
class Rewriter::UnlessExistCondition < Rewriter::Condition
# check if none of child node matches the rules.
def match?
match = false
@instance.current_node.recursive_children do |child_node|
match = match || (child_node && child_node.match?(@rules))
end
!match
end
end
# IfExistCondition checks if node has only one child node and the child node matches rules.
class Rewriter::IfOnlyExistCondition < Rewriter::Condition
# check if only have one child node and the child node matches rules.
def match?
@instance.current_node.body.size == 1 &&
@instance.current_node.body.first.match?(@rules)
end
end
end
Version data entries
19 entries across 19 versions & 1 rubygems