Class: GirFFI::Builders::FieldBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/gir_ffi/builders/field_builder.rb

Overview

Creates field getter and setter code for a given IFieldInfo.

Defined Under Namespace

Classes: GetterArgumentBuilder, GetterArgumentInfo, GetterBuilder

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(field_info, container_class) ⇒ FieldBuilder

Returns a new instance of FieldBuilder.



234
235
236
237
 
# File 'lib/gir_ffi/builders/field_builder.rb', line 234

def initialize(field_info, container_class)
  @info = field_info
  @container_class = container_class
end

Instance Attribute Details

#info ⇒ Object (readonly)

Returns the value of attribute info.



232
233
234
 
# File 'lib/gir_ffi/builders/field_builder.rb', line 232

def info
  @info
end

Instance Method Details

#build ⇒ Object 



239
240
241
242
 
# File 'lib/gir_ffi/builders/field_builder.rb', line 239

def build
  setup_getter
  setup_setter
end

#getter_def ⇒ Object 



264
265
266
267
 
# File 'lib/gir_ffi/builders/field_builder.rb', line 264

def getter_def
  getter_builder = GetterBuilder.new(info)
  getter_builder.method_definition
end

#setter_def ⇒ Object

TODO: Use MethodTemplate



270
271
272
273
274
275
276
277
278
279
280
281
282
 
# File 'lib/gir_ffi/builders/field_builder.rb', line 270

def setter_def
  builder = setter_builder

  field_ptr = builder.new_variable

  <<~CODE
    def #{info.name}= #{builder.method_argument_name}
      #{field_ptr} = @struct.to_ptr
      #{builder.pre_conversion.join("\n  ")}
      #{value_storage(field_ptr, builder)}
    end
  CODE
end

#setup_getter ⇒ Object 



244
245
246
247
248
249
250
251
252
253
254
255
 
# File 'lib/gir_ffi/builders/field_builder.rb', line 244

def setup_getter
  # The typelib does not pass along information on whether a field is
  # readble or private. This means that in practice, info.readable? is
  # always true, even for private fields.
  #
  # We include this check here in case this practice changes.
  return unless info.readable?
  return if field_type.hidden_struct_type?
  return if container_info.find_instance_method(info.name)

  container_class.class_eval getter_def, __FILE__, __LINE__
end

#setup_setter ⇒ Object 



257
258
259
260
261
262
 
# File 'lib/gir_ffi/builders/field_builder.rb', line 257

def setup_setter
  return unless info.writable?
  return if field_type.hidden_struct_type?

  container_class.class_eval setter_def, __FILE__, __LINE__
end