Class: XlibObj::Screen

Inherits:
Object
  • Object
show all
Defined in:
lib/screen.rb,
lib/screen/crtc.rb,
lib/screen/crtc/output.rb

Defined Under Namespace

Classes: Crtc

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(display, screen_pointer) ⇒ Screen

Returns a new instance of Screen.



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# File 'lib/screen.rb', line 11

def initialize(display, screen_pointer)
  @display = display
  @struct = Xlib::Screen.new(screen_pointer)

  ObjectSpace.define_finalizer(self) do
    Xlib.XRRFreeScreenResources(@resources.pointer) if @resources
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name) ⇒ Object 



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# File 'lib/screen.rb', line 31

def method_missing(name)
  attribute(name)
end

Instance Attribute Details

#display ⇒ Object (readonly)

Returns the value of attribute display.



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# File 'lib/screen.rb', line 20

def display
  @display
end

Instance Method Details

#attribute(name) ⇒ Object 



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# File 'lib/screen.rb', line 26

def attribute(name)
  return unless @struct.layout.members.include? name.to_sym
  @struct[name]
end

#crtcs ⇒ Object 



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# File 'lib/screen.rb', line 58

def crtcs
  (0..resources[:ncrtc]-1).map do |crtc_number|
    crtc_id(resources[:crtcs], crtc_number)
  end.map do |crtc_id|
    Crtc.new(self, crtc_id)
  end
end

#focused_window ⇒ Object 



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# File 'lib/screen.rb', line 43

def focused_window
  window_ptr = FFI::MemoryPointer.new :Window
  trash_ptr  = FFI::MemoryPointer.new :int
  Xlib.XGetInputFocus(@display.to_native, window_ptr, trash_ptr)
  window = window_ptr.read_int

  if window == Xlib::PointerRoot
    root_window
  elsif window == Xlib::None
    nil
  else
    Window.new(@display, window)
  end
end

#number ⇒ Object 



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# File 'lib/screen.rb', line 35

def number
  Xlib.XScreenNumberOfScreen(to_native)
end

#root_window ⇒ Object 



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# File 'lib/screen.rb', line 39

def root_window
  @root_window ||= Window.new(@display, Xlib.XRootWindowOfScreen(to_native))
end

#to_native ⇒ Object 



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# File 'lib/screen.rb', line 22

def to_native
  @struct.pointer
end