class GObjectIntrospection::Loader

Attributes

version[RW]

Public Class Methods

load(namespace, base_module, options={}) click to toggle source
# File lib/gobject-introspection/loader.rb, line 22
def load(namespace, base_module, options={})
  loader = new(base_module)
  loader.version = options[:version]
  loader.load(namespace)
end
new(base_module) click to toggle source
# File lib/gobject-introspection/loader.rb, line 30
def initialize(base_module)
  @base_module = base_module
  @version = nil
end

Public Instance Methods

load(namespace) click to toggle source
# File lib/gobject-introspection/loader.rb, line 35
def load(namespace)
  repository = Repository.default
  repository.require(namespace, @version)
  pre_load(repository, namespace)
  repository.each(namespace) do |info|
    load_info(info) if info.is_a?(InterfaceInfo)
  end
  repository.each(namespace) do |info|
    load_info(info) unless info.is_a?(InterfaceInfo)
  end
  post_load(repository, namespace)
end

Private Instance Methods

define_boxed(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 149
def define_boxed(info)
  klass = self.class.define_class(info.gtype, info.name, @base_module)
  _ = klass # TODO: Remove me. It is just for suppressing a warning.
  # TODO
  # load_fields(info, klass)
  # load_methods(info, klass)
end
define_constant(name, info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 635
def define_constant(name, info)
  @base_module.const_set(name, info.value)
end
define_enum(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 165
def define_enum(info)
  self.class.define_class(info.gtype,
                          rubyish_class_name(info),
                          @base_module)
end
define_equal_style_setter(info, klass, method_name) click to toggle source
# File lib/gobject-introspection/loader.rb, line 598
def define_equal_style_setter(info, klass, method_name)
  if /\Aset_/ =~ method_name and info.n_in_args == 1
    setter_method_name = "#{$POSTMATCH}="
    remove_existing_method(klass, setter_method_name)
    klass.__send__(:alias_method, setter_method_name, method_name)
  end
end
define_error(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 171
def define_error(info)
  self.class.define_error(info.error_domain,
                          rubyish_class_name(info),
                          @base_module,
                          :parent => error_parent_class(info),
                          :gtype => info.gtype)
end
define_inspect(info, klass, method_name) click to toggle source
Calls superclass method
# File lib/gobject-introspection/loader.rb, line 606
def define_inspect(info, klass, method_name)
  if method_name == "to_s" and info.n_args.zero?
    klass.__send__(:define_method, "inspect") do ||
      super().gsub(/\>\z/) {" #{to_s}>"}
    end
  end
end
define_method(info, klass, method_name) click to toggle source
# File lib/gobject-introspection/loader.rb, line 569
def define_method(info, klass, method_name)
  info.unlock_gvl = should_unlock_gvl?(info, klass)
  remove_existing_method(klass, method_name)
  function_info_p = (info.class == FunctionInfo)
  have_return_value_p = info.have_return_value?
  arguments_builder = ArgumentsBuilder.new(info, "#{klass}\##{method_name}")
  require_callback_p = info.require_callback?
  klass.__send__(:define_method, method_name) do |*arguments, &block|
    arguments.unshift(self) if function_info_p
    arguments_builder.build(arguments, block)
    arguments = arguments_builder.arguments
    block = arguments_builder.block
    if block.nil? and require_callback_p
      to_enum(method_name, *arguments)
    else
      if function_info_p
        return_value = info.invoke(arguments, &block)
      else
        return_value = info.invoke(self, arguments, &block)
      end
      if have_return_value_p
        return_value
      else
        self
      end
    end
  end
end
define_module_function(target_module, name, function_info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 83
def define_module_function(target_module, name, function_info)
  function_info.unlock_gvl = should_unlock_gvl?(function_info, target_module)
  method_name = "#{target_module}\#.#{name}"
  arguments_builder = ArgumentsBuilder.new(function_info, method_name)
  target_module.module_eval do
    define_method(name) do |*arguments, &block|
      arguments_builder.build(arguments, block)
      arguments = arguments_builder.arguments
      block = arguments_builder.block
      function_info.invoke(arguments, &block)
    end
    module_function(name)
  end
end
define_singleton_method(klass, name, info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 98
def define_singleton_method(klass, name, info)
  info.unlock_gvl = should_unlock_gvl?(info, klass)
  arguments_builder = ArgumentsBuilder.new(info, "#{klass}.#{name}")
  require_callback_p = info.require_callback?
  singleton_class = (class << klass; self; end)
  singleton_class.__send__(:define_method, name) do |*arguments, &block|
    arguments_builder.build(arguments, block)
    arguments = arguments_builder.arguments
    block = arguments_builder.block
    if block.nil? and require_callback_p
      to_enum(name, *arguments)
    else
      info.invoke(arguments, &block)
    end
  end
end
define_struct(info, options={}) click to toggle source
# File lib/gobject-introspection/loader.rb, line 115
def define_struct(info, options={})
  name = rubyish_class_name(info)
  if info.gtype == GLib::Type::NONE
    klass = self.class.define_struct(info.size, name, @base_module,
                                     :parent => options[:parent])
  else
    size = info.size
    size = nil if size.zero?
    klass = self.class.define_class(info.gtype, name, @base_module,
                                    :parent => options[:parent],
                                    :size   => size)
  end
  load_fields(info, klass)
  load_methods(info, klass)
end
error_parent_class(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 179
def error_parent_class(info)
  nil
end
field_name(field_info, klass) click to toggle source
# File lib/gobject-introspection/loader.rb, line 234
def field_name(field_info, klass)
  field_info.name
end
find_suitable_callable_info(infos, arguments) click to toggle source
# File lib/gobject-introspection/loader.rb, line 335
def find_suitable_callable_info(infos, arguments)
  min_n_args = nil
  max_n_args = nil
  candidate_infos = []
  infos.each do |info|
    n_in_args = info.n_in_args
    n_required_in_args = info.n_required_in_args
    if (n_required_in_args..n_in_args).cover?(arguments.size)
      candidate_infos << info
    end
    min_n_args = [min_n_args || n_required_in_args, n_required_in_args].min
    max_n_args = [max_n_args || n_in_args, n_in_args].max
  end

  if candidate_infos.size == 1
    return candidate_infos.first
  elsif candidate_infos.size > 1
    candidate_info = candidate_infos.find do |info|
      in_arg_infos = info.in_args
      arguments.each.with_index.all? do |argument, i|
        match_argument?(in_arg_infos[i], argument)
      end
    end
    return candidate_info || candidate_infos.first
  end

  detail = "#{arguments.size} for #{min_n_args}"
  if min_n_args < max_n_args
    detail << "..#{max_n_args}"
  end
  raise ArgumentError, "wrong number of arguments (#{detail})"
end
flags_class_name(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 215
def flags_class_name(info)
  info.name
end
initialize_post(object) click to toggle source
# File lib/gobject-introspection/loader.rb, line 332
def initialize_post(object)
end
load_boxed_info(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 157
def load_boxed_info(info)
  define_boxed(info)
end
load_constant_info(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 631
def load_constant_info(info)
  define_constant(info.name, info)
end
load_constructor_infos(infos, klass) click to toggle source
# File lib/gobject-introspection/loader.rb, line 303
def load_constructor_infos(infos, klass)
  return if infos.empty?

  call_initialize_post = lambda do |object|
    initialize_post(object)
  end
  infos.each do |info|
    name = "initialize_#{info.name}"
    info.unlock_gvl = should_unlock_gvl?(info, klass)
    arguments_builder = ArgumentsBuilder.new(info, "#{klass}\##{name}")
    klass.__send__(:define_method, name) do |*arguments, &block|
      arguments_builder.build(arguments, block)
      arguments = arguments_builder.arguments
      block = arguments_builder.block
      info.invoke(self, arguments, &block)
      call_initialize_post.call(self)
    end
    klass.__send__(:private, name)
  end

  find_info = lambda do |arguments|
    find_suitable_callable_info(infos, arguments)
  end
  klass.__send__(:define_method, "initialize") do |*arguments, &block|
    info = find_info.call(arguments, &block)
    __send__("initialize_#{info.name}", *arguments, &block)
  end
end
load_enum_info(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 183
def load_enum_info(info)
  if info.gtype == GLib::Type::NONE
    enum_module = Module.new
    info.values.each do |value_info|
      load_enum_value(value_info, enum_module)
    end
    @base_module.const_set(rubyish_class_name(info), enum_module)
  else
    if info.error_domain
      define_error(info)
    else
      define_enum(info)
    end
  end
end
load_enum_value(value_info, enum_module) click to toggle source
# File lib/gobject-introspection/loader.rb, line 161
def load_enum_value(value_info, enum_module)
  enum_module.const_set(value_info.name.upcase, value_info.value)
end
load_field(info, i, field_info, klass, options={}) click to toggle source
# File lib/gobject-introspection/loader.rb, line 238
def load_field(info, i, field_info, klass, options={})
  name = field_name(field_info, klass)
  flags = field_info.flags

  readable = options[:readable]
  readable = flags.readable? if readable.nil?
  if readable
    reader_method_name = rubyish_field_reader_name(field_info, name)
    load_field_reader(info, i, field_info, klass, name, reader_method_name)
  end

  writable = options[:writable]
  writable = flags.writable? if writable.nil?
  if writable
    load_field_writer(info, i, field_info, klass, name, "#{name}=")
  end
end
load_field_reader(info, i, field_info, klass, name, method_name) click to toggle source
# File lib/gobject-introspection/loader.rb, line 256
def load_field_reader(info, i, field_info, klass, name, method_name)
  remove_existing_method(klass, method_name)

  need_number_to_bool_convert = false
  if name.start_with?("is_") and
      field_info.type.tag == TypeTag::UINT32
    need_number_to_bool_convert = true
  end
  klass.__send__(:define_method, method_name) do ||
    value = info.get_field_value(self, i)
    if need_number_to_bool_convert
      value != 0
    else
      value
    end
  end
end
load_field_writer(info, i, field_info, klass, name, method_name) click to toggle source
# File lib/gobject-introspection/loader.rb, line 274
def load_field_writer(info, i, field_info, klass, name, method_name)
  klass.__send__(:define_method, method_name) do |value|
    info.set_field_value(self, i, value)
  end
end
load_fields(info, klass) click to toggle source
# File lib/gobject-introspection/loader.rb, line 227
def load_fields(info, klass)
  info.n_fields.times do |i|
    field_info = info.get_field(i)
    load_field(info, i, field_info, klass)
  end
end
load_flag_value(value_info, flags_module) click to toggle source
# File lib/gobject-introspection/loader.rb, line 199
def load_flag_value(value_info, flags_module)
  flags_module.const_set(value_info.name.upcase, value_info.value)
end
load_flags_info(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 203
def load_flags_info(info)
  if info.gtype == GLib::Type::NONE
    flags_module = Module.new
    info.values.each do |value_info|
      load_flag_value(value_info, flags_module)
    end
    @base_module.const_set(rubyish_class_name(info), flags_module)
  else
    self.class.define_class(info.gtype, flags_class_name(info), @base_module)
  end
end
load_function_info(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 78
def load_function_info(info)
  name = rubyish_method_name(info)
  define_singleton_method(@base_module, name, info)
end
load_function_infos(infos, klass) click to toggle source
# File lib/gobject-introspection/loader.rb, line 614
def load_function_infos(infos, klass)
  infos.each do |info|
    name = rubyish_method_name(info)
    next if name == "new"
    next if name == "alloc"
    define_singleton_method(klass, name, info)
  end
end
load_info(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 55
def load_info(info)
  case info
  when FunctionInfo
    load_function_info(info)
  when StructInfo
    load_struct_info(info)
  when BoxedInfo
    load_boxed_info(info)
  when FlagsInfo
    load_flags_info(info)
  when EnumInfo
    load_enum_info(info)
  when ObjectInfo
    load_object_info(info)
  when InterfaceInfo
    load_interface_info(info)
  when ConstantInfo
    load_constant_info(info)
  when UnionInfo
    load_union_info(info)
  end
end
load_interface_info(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 623
def load_interface_info(info)
  interface_module =
    self.class.define_interface(info.gtype,
                                rubyish_class_name(info),
                                @base_module)
  load_methods(info, interface_module)
end
load_method_info(info, klass, method_name) click to toggle source
# File lib/gobject-introspection/loader.rb, line 557
def load_method_info(info, klass, method_name)
  define_method(info, klass, method_name)
  define_equal_style_setter(info, klass, method_name)
  define_inspect(info, klass, method_name)
end
load_method_infos(infos, klass) click to toggle source
# File lib/gobject-introspection/loader.rb, line 550
def load_method_infos(infos, klass)
  infos.each do |info|
    method_name = rubyish_method_name(info)
    load_method_info(info, klass, method_name)
  end
end
load_methods(info, klass) click to toggle source
# File lib/gobject-introspection/loader.rb, line 280
def load_methods(info, klass)
  grouped_methods = info.methods.group_by do |method_info|
    method_info.class
  end
  grouped_methods.each do |method_info_class, method_infos|
    next if method_infos.empty?
    case method_infos.first
    when ConstructorInfo
      load_constructor_infos(method_infos, klass)
    when MethodInfo
      load_method_infos(method_infos, klass)
    when FunctionInfo
      load_function_infos(method_infos, klass)
    else
      raise "TODO: #{method_info_class}"
    end
  end
  if klass.method_defined?(:each) and
      klass.instance_method(:each).owner == klass
    klass.include(Enumerable)
  end
end
load_object_info(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 219
def load_object_info(info)
  klass = self.class.define_class(info.gtype,
                                  rubyish_class_name(info),
                                  @base_module)
  load_fields(info, klass)
  load_methods(info, klass)
end
load_struct_info(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 131
def load_struct_info(info)
  case info.name
  when /Class\z/
    base_class_name = rubyish_class_name(info)
    method_infos = info.methods.find_all do |method_info|
      method_info.is_a?(MethodInfo)
    end
    unless method_infos.empty?
      base_class = @base_module.const_get(base_class_name)
      load_method_infos(method_infos, base_class.singleton_class)
    end
  else
    return if info.gtype_struct?

    define_struct(info)
  end
end
load_union_info(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 639
def load_union_info(info)
  klass = self.class.define_class(info.gtype, info.name, @base_module)
  load_fields(info, klass)
  load_methods(info, klass)
end
match_argument?(arg_info, argument) click to toggle source
# File lib/gobject-introspection/loader.rb, line 368
def match_argument?(arg_info, argument)
  return true if argument.nil? and arg_info.may_be_null?

  type = arg_info.type
  case type.tag
  when TypeTag::BOOLEAN
    argument == true or argument == false
  when TypeTag::INT8,
       TypeTag::UINT8,
       TypeTag::INT16,
       TypeTag::UINT16,
       TypeTag::INT32,
       TypeTag::UINT32,
       TypeTag::INT64,
       TypeTag::UINT64,
       TypeTag::FLOAT,
       TypeTag::DOUBLE
    argument.is_a?(Numeric)
  when TypeTag::GTYPE
    argument.is_a?(GLib::Type)
  when TypeTag::UTF8
    argument.is_a?(String)
  when TypeTag::FILENAME
    argument.is_a?(String)
  when TypeTag::ARRAY
    argument.is_a?(Array)
  when TypeTag::INTERFACE
    interface = type.interface
    case interface.type
    when InfoType::STRUCT
      match_argument_interface_struct?(arg_info, interface, argument)
    when InfoType::OBJECT,
         InfoType::INTERFACE,
         InfoType::FLAGS,
         InfoType::ENUM
      argument.is_a?(interface.gtype.to_class)
    else
      # TODO
      false
    end
  when TypeTag::GLIST,
       TypeTag::GSLIST
    argument.is_a?(Array)
  else
    # TODO
    false
  end
end
match_argument_interface_struct?(arg_info, interface, argument) click to toggle source
# File lib/gobject-introspection/loader.rb, line 417
def match_argument_interface_struct?(arg_info, interface, argument)
  gtype = interface.gtype
  case gtype.name
  when "void"
    # TODO
    false
  when "CairoSurface"
    if Object.const_defined?(:Cairo)
      argument.is_a?(Cairo::Surface)
    else
      false
    end
  else
    argument.is_a?(gtype.to_class)
  end
end
post_load(repository, namespace) click to toggle source
# File lib/gobject-introspection/loader.rb, line 52
def post_load(repository, namespace)
end
pre_load(repository, namespace) click to toggle source
# File lib/gobject-introspection/loader.rb, line 49
def pre_load(repository, namespace)
end
remove_existing_method(klass, method_name) click to toggle source
# File lib/gobject-introspection/loader.rb, line 563
def remove_existing_method(klass, method_name)
  return unless klass.method_defined?(method_name)
  return unless klass.instance_method(method_name).owner == klass
  klass.__send__(:remove_method, method_name)
end
rubyish_class_name(info) click to toggle source
# File lib/gobject-introspection/loader.rb, line 531
def rubyish_class_name(info)
  name = info.name
  case info
  when StructInfo
    case name
    when /Class\z/
      $PREMATCH
    else
      name
    end
  else
    name
  end
end
rubyish_field_reader_name(field_info, name) click to toggle source
# File lib/gobject-introspection/loader.rb, line 516
def rubyish_field_reader_name(field_info, name)
  case field_info.type.tag
  when TypeTag::BOOLEAN
    name.gsub(/\Ais_/, "") + "?"
  when TypeTag::UINT32
    if /\Ais_/ =~ name
      "#{$POSTMATCH}?"
    else
      name
    end
  else
    name
  end
end
rubyish_method_name(function_info, options={}) click to toggle source
# File lib/gobject-introspection/loader.rb, line 434
def rubyish_method_name(function_info, options={})
  name = function_info.name
  if options[:prefix]
    name = name.gsub(/\A#{Regexp.escape(options[:prefix])}/, "")
  end
  if name == "initialize"
    name += "_raw"
  end

  n_in_args = function_info.n_in_args
  if options[:n_in_args_offset]
    n_in_args += options[:n_in_args_offset]
  end

  return_type = function_info.return_type
  return_type_tag = return_type.tag
  if return_type_tag == TypeTag::VOID
    out_arg_tags = function_info.out_args.collect {|arg| arg.type.tag}
    if out_arg_tags == [TypeTag::ARRAY, TypeTag::INT32]
      return_type_tag = TypeTag::ARRAY
    end
  end

  case return_type_tag
  when TypeTag::BOOLEAN
    case name
    when "equal"
      if n_in_args == 1
        "=="
      else
        name
      end
    when /\A(?:is|get_is|can_be)_/
      "#{$POSTMATCH}?"
    when /\Aget_/
      if n_in_args.zero?
        if function_info.n_out_args.zero?
          "#{$POSTMATCH}?"
        else
          $POSTMATCH
        end
      else
        name
      end
    when /\A(?:has|use|can|in|on|.*_is)_/
      "#{name}?"
    when "exists"
      "exist?"
    else
      name
    end
  when TypeTag::GLIST, TypeTag::GSLIST, TypeTag::ARRAY
    case name
    when /\A(?:list|get)_/
      if n_in_args.zero?
        $POSTMATCH
      else
        name
      end
    else
      name
    end
  else
    case name
    when /\Aget_/
      if n_in_args.zero?
        $POSTMATCH
      else
        name
      end
    when "to_string"
      "to_s"
    when "to_integer"
      "to_i"
    when "foreach"
      "each"
    else
      name
    end
  end
end
should_unlock_gvl?(function_info, klass) click to toggle source
# File lib/gobject-introspection/loader.rb, line 546
def should_unlock_gvl?(function_info, klass)
  false
end