Class: GObject::Value

Inherits:
Object
  • Object
show all
Defined in:
lib/ffi-gobject/value.rb

Overview

Overrides for GValue, GObject’s generic value container structure.

Constant Summary collapse

METHOD_MAP = 
{
  TYPE_BOOLEAN => [:get_boolean,       :set_boolean],
  TYPE_BOXED   => [:get_boxed,         :set_boxed],
  TYPE_CHAR    => [:get_char,          :set_char],
  TYPE_DOUBLE  => [:get_double,        :set_double],
  TYPE_ENUM    => [:get_enum_enhanced, :set_enum_enhanced],
  TYPE_FLAGS   => [:get_flags,         :set_flags],
  TYPE_FLOAT   => [:get_float,         :set_float],
  TYPE_GTYPE   => [:get_gtype,         :set_gtype],
  TYPE_INT     => [:get_int,           :set_int],
  TYPE_INT64   => [:get_int64,         :set_int64],
  TYPE_LONG    => [:get_long,          :set_long],
  TYPE_OBJECT  => [:get_object,        :set_instance_enhanced],
  TYPE_PARAM   => [:get_param,         :set_param],
  TYPE_POINTER => [:get_pointer,       :set_pointer],
  TYPE_STRING  => [:get_string,        :set_string],
  TYPE_UCHAR   => [:get_uchar,         :set_uchar],
  TYPE_UINT    => [:get_uint,          :set_uint],
  TYPE_UINT64  => [:get_uint64,        :set_uint64],
  TYPE_ULONG   => [:get_ulong,         :set_ulong],
  TYPE_VARIANT => [:get_variant,       :set_variant]
}
CLASS_TO_GTYPE_MAP = 
{
  TrueClass => TYPE_BOOLEAN,
  FalseClass => TYPE_BOOLEAN,
  Integer => TYPE_INT,
  String => TYPE_STRING
}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.for_g_type(g_type) ⇒ Object 



99
100
101
102
 
# File 'lib/ffi-gobject/value.rb', line 99

def self.for_g_type g_type
  return nil if g_type == TYPE_NONE
  new.tap { |it| it.init g_type }
end

.from(val) ⇒ Object 



88
89
90
91
92
93
94
95
96
97
 
# File 'lib/ffi-gobject/value.rb', line 88

def self.from val
  case val
  when self
    val
  when nil
    nil
  else
    wrap_ruby_value val
  end
end

.wrap_instance(instance) ⇒ Object

TODO: Combine with wrap_ruby_value



105
106
107
108
109
110
 
# File 'lib/ffi-gobject/value.rb', line 105

def self.wrap_instance instance
  new.tap {|it|
    it.init GObject.type_from_instance instance
    it.set_instance instance
  }
end

.wrap_ruby_value(val) ⇒ Object

TODO: Give more generic name



84
85
86
 
# File 'lib/ffi-gobject/value.rb', line 84

def self.wrap_ruby_value val
  new.tap { |gv| gv.set_ruby_value val }
end

Instance Method Details

#current_fundamental_type ⇒ Object 



62
63
64
 
# File 'lib/ffi-gobject/value.rb', line 62

def current_fundamental_type
  GObject.type_fundamental current_gtype
end

#current_gtype ⇒ Object 



58
59
60
 
# File 'lib/ffi-gobject/value.rb', line 58

def current_gtype
  @struct[:g_type]
end

#current_gtype_name ⇒ Object 



66
67
68
 
# File 'lib/ffi-gobject/value.rb', line 66

def current_gtype_name
  GObject.type_name current_gtype
end

#get_value ⇒ Object 



70
71
72
73
74
75
76
77
 
# File 'lib/ffi-gobject/value.rb', line 70

def get_value
  value = get_value_plain
  if current_fundamental_type == TYPE_BOXED
    wrap_boxed value
  else
    value
  end
end

#get_value_plain ⇒ Object 



79
80
81
 
# File 'lib/ffi-gobject/value.rb', line 79

def get_value_plain
  send get_method
end

#init_for_ruby_value(val) ⇒ Object 



48
49
50
51
52
53
54
55
56
 
# File 'lib/ffi-gobject/value.rb', line 48

def init_for_ruby_value val
  CLASS_TO_GTYPE_MAP.each do |klass, type|
    if val.is_a? klass
      init type
      return self
    end
  end
  raise "Can't handle #{val.class}"
end

#set_ruby_value(val) ⇒ Object

TODO: Give more generic name



7
8
9
10
 
# File 'lib/ffi-gobject/value.rb', line 7

def set_ruby_value val
  init_for_ruby_value val if current_gtype == 0
  set_value val
end

#set_value(val) ⇒ Object Also known as: value= 



35
36
37
 
# File 'lib/ffi-gobject/value.rb', line 35

def set_value val
  send set_method, val
end