Module: Xlib::X

Defined in:
lib/xlib/x.rb

Class Method Summary collapse

Class Method Details

.close_display(display) ⇒ Object 



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# File 'lib/xlib/x.rb', line 10

def close_display(display)
  Xlib.XCloseDisplay(display.to_native)
end

.flush(display) ⇒ Object 



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# File 'lib/xlib/x.rb', line 53

def flush(display)
  Xlib.XFlush(display.to_native)
end

.get_event_data(display, event_cookie) ⇒ Object 



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# File 'lib/xlib/x.rb', line 34

def get_event_data(display, event_cookie)
  Xlib::XGetEventData(display.to_native, event_cookie.pointer)
end

.list_extensions(display) ⇒ Object 



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# File 'lib/xlib/x.rb', line 14

def list_extensions(display)
  nextensions_ptr = FFI::MemoryPointer.new :pointer
  extensions_ptr = Xlib.XListExtensions(display.to_native, nextensions_ptr)
  nextensions = nextensions_ptr.read_int
  extensions = extensions_ptr.get_array_of_string(0, nextensions)
  Xlib.XFreeExtensionList(extensions_ptr)
  extensions
end

.next_event(display) ⇒ Object 



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# File 'lib/xlib/x.rb', line 43

def next_event(display)
  xevent = Xlib::XEvent.new
  Xlib.XNextEvent(display.to_native, xevent) # blocks
  xevent
end

.open_display(name) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/xlib/x.rb', line 4

def open_display(name)
  display_pointer = Xlib.XOpenDisplay(name)
  raise ArgumentError, "Unknown display #{name}" if display_pointer.null?
  Xlib::Display.new(display_pointer)
end

.pending(display) ⇒ Object 



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# File 'lib/xlib/x.rb', line 49

def pending(display)
  Xlib.XPending(display.to_native)
end

.query_extension(display, name) ⇒ Object 



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# File 'lib/xlib/x.rb', line 23

def query_extension(display, name)
  opcode_ptr = FFI::MemoryPointer.new :int
  evcode_ptr = FFI::MemoryPointer.new :int
  errcode_ptr = FFI::MemoryPointer.new :int
  if Xlib.XQueryExtension(display.to_native, name, opcode_ptr, evcode_ptr, errcode_ptr)
    { opcode: opcode_ptr.read_int, first_event: evcode_ptr.read_int, first_error: errcode_ptr.read_int}
  else
    false
  end
end

.select_input(display, window, mask) ⇒ Object 



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# File 'lib/xlib/x.rb', line 38

def select_input(display, window, mask)
  Xlib.XSelectInput(display.to_native, window.to_native, mask)
  flush(display)
end