Module: GirFFI::InfoExt::ITypeInfo

Included in:
ErrorTypeInfo, ReceiverTypeInfo, UserDataTypeInfo
Defined in:
lib/gir_ffi/info_ext/i_type_info.rb

Overview

Extensions for GObjectIntrospection::ITypeInfo needed by GirFFI

Constant Summary collapse

TAG_TO_WRAPPER_CLASS_MAP = 
{
  array:           'GLib::Array',
  byte_array:      'GLib::ByteArray',
  c:               'GirFFI::SizedArray',
  error:           'GLib::Error',
  ghash:           'GLib::HashTable',
  glist:           'GLib::List',
  gslist:          'GLib::SList',
  ptr_array:       'GLib::PtrArray',
  strv:            'GLib::Strv',
  utf8:            'GirFFI::InPointer',
  void:            'GirFFI::InPointer',
  zero_terminated: 'GirFFI::ZeroTerminated'
}.freeze
TAGS_NEEDING_RUBY_TO_C_CONVERSION = 
[
  :array, :c, :callback, :error, :ghash, :glist, :gslist, :object,
  :ptr_array, :struct, :strv, :utf8, :void, :zero_terminated
].freeze
TAGS_NEEDING_C_TO_RUBY_CONVERSION = 
[
  :array, :byte_array, :c, :error, :filename, :ghash, :glist, :gslist,
  :interface, :object, :ptr_array, :struct, :strv, :union, :utf8,
  :zero_terminated
].freeze
GOBJECT_VALUE_NAME = 
'GObject::Value'.freeze

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.flattened_tag_to_gtype_map ⇒ Object 



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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 8

def self.flattened_tag_to_gtype_map
  @flattened_tag_to_gtype_map ||= {
    array:    GObject::TYPE_ARRAY,
    c:        GObject::TYPE_POINTER,
    gboolean: GObject::TYPE_BOOLEAN,
    ghash:    GObject::TYPE_HASH_TABLE,
    gint32:   GObject::TYPE_INT,
    gint64:   GObject::TYPE_INT64,
    guint64:  GObject::TYPE_UINT64,
    strv:     GObject::TYPE_STRV,
    utf8:     GObject::TYPE_STRING,
    void:     GObject::TYPE_NONE
  }.freeze
end

Instance Method Details

#argument_class_name ⇒ Object

TODO: Use class rather than class name



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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 90

def argument_class_name
  if tag == :interface
    interface.full_type_name
  else
    TAG_TO_WRAPPER_CLASS_MAP[flattened_tag]
  end
end

#element_type ⇒ Object 



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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 34

def element_type
  case tag
  when :glist, :gslist, :array, :c
    enumerable_element_type
  when :ghash
    dictionary_element_type
  end
end

#extra_conversion_arguments ⇒ Object 



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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 168

def extra_conversion_arguments
  case flattened_tag
  when :utf8, :void
    [flattened_tag]
  when :c
    [element_type, array_fixed_size]
  when :array, :ghash, :glist, :gslist, :ptr_array, :zero_terminated
    [element_type]
  else
    []
  end
end

#flattened_tag ⇒ Object 



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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 43

def flattened_tag
  case tag
  when :interface
    interface_type
  when :array
    flattened_array_type
  else
    tag
  end
end

#gtype ⇒ Object 



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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 23

def gtype
  return interface.gtype if tag == :interface
  type = ITypeInfo.flattened_tag_to_gtype_map[flattened_tag]
  return type if type
  raise "Can't find GType for #{flattened_tag} pointer? = #{pointer?}"
end

#gvalue? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 183

def gvalue?
  argument_class_name == GOBJECT_VALUE_NAME
end

#interface_type ⇒ Object 



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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 54

def interface_type
  tag == :interface && interface.info_type
end

#make_g_value ⇒ Object 



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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 30

def make_g_value
  GObject::Value.for_gtype gtype
end

#needs_c_to_ruby_conversion_for_callbacks? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 155

def needs_c_to_ruby_conversion_for_callbacks?
  [:callback, :enum].include?(flattened_tag) ||
    needs_c_to_ruby_conversion_for_functions?
end

#needs_c_to_ruby_conversion_for_closures? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 160

def needs_c_to_ruby_conversion_for_closures?
  [:array, :c, :ghash, :struct, :strv].include?(flattened_tag)
end

#needs_c_to_ruby_conversion_for_functions? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 146

def needs_c_to_ruby_conversion_for_functions?
  TAGS_NEEDING_C_TO_RUBY_CONVERSION.include?(flattened_tag)
end

#needs_ruby_to_c_conversion_for_callbacks? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 150

def needs_ruby_to_c_conversion_for_callbacks?
  [:enum].include?(flattened_tag) ||
    needs_ruby_to_c_conversion_for_functions?
end

#needs_ruby_to_c_conversion_for_closures? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 164

def needs_ruby_to_c_conversion_for_closures?
  [:array].include?(flattened_tag)
end

#needs_ruby_to_c_conversion_for_functions? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 142

def needs_ruby_to_c_conversion_for_functions?
  TAGS_NEEDING_RUBY_TO_C_CONVERSION.include?(flattened_tag)
end

#tag_or_class ⇒ Object 



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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 58

def tag_or_class
  base = case tag
         when:interface
           Builder.build_class interface
         when :ghash
           [tag, *element_type]
         else
           flattened_tag
         end
  if pointer? && tag != :utf8 && tag != :filename
    [:pointer, base]
  else
    base
  end
end

#to_callback_ffi_type ⇒ Object 



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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 111

def to_callback_ffi_type
  return :pointer if pointer?

  case tag
  when :interface
    # TODO: Move this logic into interface
    case interface.info_type
    when :enum, :flags
      :int32
    else
      :pointer
    end
  when :gboolean
    # TODO: Move this logic into TypeMap
    :bool
  else
    TypeMap.map_basic_type tag
  end
end

#to_ffi_type ⇒ Object 



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# File 'lib/gir_ffi/info_ext/i_type_info.rb', line 98

def to_ffi_type
  return :pointer if pointer?

  case tag
  when :interface
    interface.to_ffi_type
  when :array
    [subtype_ffi_type(0), array_fixed_size]
  else
    TypeMap.map_basic_type tag
  end
end