Class: Dommy::Js::ConstructorResolver

Inherits:
Object
  • Object
show all
Defined in:
lib/dommy/js/constructor_resolver.rb

Overview

Resolves a JS constructor by interface name for reverse construction (new Event(...), new DOMException(...)). The window object is the source for most constructors — it exposes them via js_get — while a few not on the window are provided directly. Engine-agnostic.

A resolver, not a store: it holds no map and looks each name up live via the window. Named distinctly from Dommy::Bridge::ConstructorRegistry (the abstract name -> Bridge::Constructor map), which is a different thing.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ConstructorResolver

Returns a new instance of ConstructorResolver.



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# File 'lib/dommy/js/constructor_resolver.rb', line 17

def initialize
  @source = nil
end

Instance Attribute Details

#source=(value) ⇒ Object (writeonly)

The window whose js_get exposes Event/CustomEvent/MouseEvent/… .



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# File 'lib/dommy/js/constructor_resolver.rb', line 15

def source=(value)
  @source = value
end

Instance Method Details

#resolve(name) ⇒ Object

An object responding to js_new for name, or nil if name isn't constructable (the bridge then makes the JS side throw).



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# File 'lib/dommy/js/constructor_resolver.rb', line 23

def resolve(name)
  if @source.respond_to?(:__js_get__)
    ctor = @source.__js_get__(name)
    return ctor if ctor.respond_to?(:__js_new__)
  end
  extra(name)
end