Class: Ext::JavaScript

Inherits:
Object
  • Object
show all
Defined in:
lib/ext/java_script.rb

Defined Under Namespace

Classes: Var

Instance Method Summary collapse

Constructor Details

#initialize ⇒ JavaScript

Returns a new instance of JavaScript.



18
19
20
21
 
# File 'lib/ext/java_script.rb', line 18

def initialize
  @vars = ActiveSupport::OrderedHash.new
  @records = []
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(*args) ⇒ Object (private) 



62
63
64
65
66
67
68
69
70
 
# File 'lib/ext/java_script.rb', line 62

def method_missing(*args)
  name = args.shift
  obj  = var(name)
  if args.empty?
    obj
  else
    record obj.__send__(*args)
  end
end

Instance Method Details

#execute(&block) ⇒ Object 



49
50
51
 
# File 'lib/ext/java_script.rb', line 49

def execute(&block)
  instance_eval &block
end

#record(js) ⇒ Object 



45
46
47
 
# File 'lib/ext/java_script.rb', line 45

def record(js)
  @records << js
end

#to_function ⇒ Object 



53
54
55
 
# File 'lib/ext/java_script.rb', line 53

def to_function
  "function(){%s}" % to_s
end

#to_s ⇒ Object 



57
58
59
 
# File 'lib/ext/java_script.rb', line 57

def to_s
  @records.map{|js| "#{js};"}.join("\n")
end

#var(*args) ⇒ Object

name, object



23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/ext/java_script.rb', line 23

def var(*args) # name, object
  name   = args[0].to_s
  object = args[1]

  case args.size
  when 1 # getter
    value = @vars[name] or
      raise NameError, "undefined local variable `#{name}'"
    return value

  when 2 # setter
    if respond_to?(name)
      raise ArgumentError, "#{name} is reserved name"
    end
    @vars[name] = Var.new(name, object)
    record @vars[name]

  else
    raise ArgumentError, "args size should be 2 or 3. (#{args.inspect})"
  end
end