class ActionDispatch::PermissionsPolicy


end
policy.payment :self, “secure.example.com”
policy.fullscreen :self
policy.usb :none
policy.microphone :none
policy.gyroscope :none
policy.camera :none
Rails.application.config.permissions_policy do |policy|
Example global policy:
its iframes can use.
response header to specify which browser features the current document and
Configures the HTTP
:nodoc:

def apply_mapping(source) 

def apply_mapping(source)
  MAPPINGS.fetch(source) do
    raise ArgumentError, "Unknown HTTP permissions policy source mapping: #{source.inspect}"
  end
end

def apply_mappings(sources) 

def apply_mappings(sources)
  sources.map do |source|
    case source
    when Symbol
      apply_mapping(source)
    when String, Proc
      source
    else
      raise ArgumentError, "Invalid HTTP permissions policy source: #{source.inspect}"
    end
  end
end

def build(context = nil) 

def build(context = nil)
  build_directives(context).compact.join("; ")
end

def build_directive(sources, context) 

def build_directive(sources, context)
  sources.map { |source| resolve_source(source, context) }
end

def build_directives(context) 

def build_directives(context)
  @directives.map do |directive, sources|
    if sources.is_a?(Array)
      "#{directive} #{build_directive(sources, context).join(' ')}"
    elsif sources
      directive
    else
      nil
    end
  end
end

def initialize 

def initialize
  @directives = {}
  yield self if block_given?
end

def initialize_copy(other) 

def initialize_copy(other)
  @directives = other.directives.deep_dup
end

def resolve_source(source, context) 

def resolve_source(source, context)
  case source
  when String
    source
  when Symbol
    source.to_s
  when Proc
    if context.nil?
      raise RuntimeError, "Missing context for the dynamic permissions policy source: #{source.inspect}"
    else
      context.instance_exec(&source)
    end
  else
    raise RuntimeError, "Unexpected permissions policy source: #{source.inspect}"
  end
end