Class: Dommy::Screen

Inherits:
Object
  • Object
show all
Includes:
Bridge::Methods
Defined in:
lib/dommy/screen.rb

Overview

window.screen — the Screen interface. A headless browser has no physical display, so the screen reports the (approximate) viewport size, with standard desktop colour depth and an orientation derived from the aspect ratio.

window.screen is always present in a real browser, and screen.width / screen.height are routinely read unguarded (analytics, responsive logic), so a missing screen makes them throw "cannot read property 'width' of undefined" — which is exactly what real sites hit when Dommy lacked it.

Instance Method Summary collapse

Methods included from Bridge::Methods

included

Constructor Details

#initialize(window) ⇒ Screen

Returns a new instance of Screen.



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# File 'lib/dommy/screen.rb', line 13

def initialize(window)
  @window = window
end

Instance Method Details

#__js_call__(method, _args) ⇒ Object 



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# File 'lib/dommy/screen.rb', line 46

def __js_call__(method, _args)
  case method
  when "addEventListener", "removeEventListener" then nil
  when "dispatchEvent" then true
  end
end

#__js_get__(key) ⇒ Object 



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# File 'lib/dommy/screen.rb', line 17

def __js_get__(key)
  case key
  when "width", "availWidth"
    @window.inner_width
  when "height", "availHeight"
    @window.inner_height
  when "availLeft", "availTop"
    0
  when "colorDepth", "pixelDepth"
    24
  when "isExtended"
    false
  when "orientation"
    @orientation ||= ScreenOrientation.new(@window)
  else
    # Anything else is genuinely absent (JS `undefined`, `"x" in screen`
    # false) so feature detection takes the not-supported path.
    Bridge::ABSENT
  end
end

#__js_set__(_key, _value) ⇒ Object 



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# File 'lib/dommy/screen.rb', line 38

def __js_set__(_key, _value)
  Bridge::UNHANDLED
end