Module: Prototype::ClassMethods

Included in:
Prototype
Defined in:
lib/prototype.rb,
lib/prototype-2.0.0.rb

Instance Method Summary collapse

Instance Method Details

#clone(src, *a, &b) ⇒ Object 



45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
 
# File 'lib/prototype.rb', line 45

def clone src, *a, &b
  c = src.class
  c = Class.new c
  dst = c.new *a 

  sc =
    class << src 
      self
    end

  modules = sc.instance_variable_get('@modules') || []
  modules.each{|mod| extend dst, mod}

  src.instance_variables.each do |ivar|
    value = src.instance_variable_get ivar
    dst.instance_variable_set ivar, value
  end
  prototyping dst, &b
  dst
end

#context(&b) ⇒ Object 



109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
 
# File 'lib/prototype.rb', line 109

def context &b
  mod = Module.new
  sc = 
    class << mod 
      self
    end

  sc.module_eval do
    __method__ = {} and define_method(:__method__){ __method__ }

    def __call__(m, *a, &b)
      meth = __method__[m.to_s]
      raise NoMethodError, m.to_s unless meth
      meth.call *a, &b
    end

    alias_method '__define_method__', 'define_method'
  end

  mod.methods.each{|m| mod.__method__[m] = mod.method(m) unless %w( __call__ __method__ ).include?(m)}

  mod.methods.each do |m|
    unless m =~ /^__|attribute/
      sc.module_eval{ undef_method m }
    end
  end

  sc.module_eval do
    def method_missing m, *a, &b
      if b
        __define_method__ m, *a, &b
      else
        ivar = "@#{ m }"
        case a.size
        when 0
          if eval("defined? #{ ivar }")
            __call__ 'instance_variable_get', ivar
          else
            super
          end
        when 1
          value = a.shift
          __call__ 'instance_variable_set', ivar, value 
        else
          super
        end
      end
    end
  end

  mod.__call__ 'module_eval', &b if b

  mod.__call__ 'module_eval' do
    defined = __call('instance_methods').inject({}){|h,m| h.update m => true}

    __call__('instance_variables').each do |ivar|
      m = ivar[1..-1]
      getter, setter, query = defined["#{ m }"], defined["#{ m }="], defined["#{ m }?"]

      if getter.nil? and setter.nil? and query.nil? 
        __call__ 'attribute', m
        next
      end
      if getter.nil?
        __call__ 'module_eval', "def #{ m }() #{ ivar } end"
      end
      if setter.nil?
        __call__ 'module_eval', "def #{ m }=(v) #{ ivar }=v end"
      end
      if query.nil?
        __call__ 'module_eval', "def #{ m }?() defined?(#{ ivar }) and #{ ivar } end"
      end
    end
  end

  mod
end

#extend(obj, mod) ⇒ Object 



78
79
80
81
82
83
84
85
86
87
 
# File 'lib/prototype.rb', line 78

def extend obj, mod
  sc =
    class << obj
      self
    end
  sc.module_eval do 
    (@modules ||= []) << mod
    include mod
  end
end

#inherit(c = Object, *a, &b) ⇒ Object Also known as: exnihilo, ex_nihilo 



30
31
32
33
34
 
# File 'lib/prototype.rb', line 30

def inherit c = Object, *a, &b
  c = c.class unless Class === c
  c = Class.new c
  new c, *a, &b
end

#new(c = Object, *a, &b) ⇒ Object 



38
39
40
41
42
43
 
# File 'lib/prototype.rb', line 38

def new c = Object, *a, &b
  c = c.class unless Class === c
  obj = c.new *a 
  prototyping obj, &b
  obj
end

#prototyped!(obj) ⇒ Object 



99
100
101
102
103
104
105
106
107
 
# File 'lib/prototype.rb', line 99

def prototyped! obj
  sc =
    class << obj
      self
    end
  sc.module_eval do 
    @prototyped = true
  end
end

#prototyped?(obj) ⇒ Boolean

Returns:

  • (Boolean) 


89
90
91
92
93
94
95
96
97
 
# File 'lib/prototype.rb', line 89

def prototyped? obj
  sc =
    class << obj
      self
    end
  sc.module_eval do 
    defined?(@prototyped) and @prototyped
  end
end

#prototyping(obj, &b) ⇒ Object 



66
67
68
69
70
71
72
73
74
75
76
 
# File 'lib/prototype.rb', line 66

def prototyping obj, &b
  obj.extend InstanceMethods 
  mod = Prototype.context &b
  ivars = mod.__method__["instance_variables"].call()
  ivars.each do |ivar|
    value = mod.__method__["instance_variable_get"].call(ivar)
    obj.instance_eval{ instance_variable_set ivar, value }
  end
  extend obj, mod
  obj
end

#version ⇒ Object 



28
 
# File 'lib/prototype.rb', line 28

def version() VERSION end