Class: RatatuiRuby::Event::None

Inherits:
RatatuiRuby::Event show all
Defined in:
lib/ratatui_ruby/event/none.rb

Overview

Null object for absent events.

Event loops poll for input 60 times per second. Usually nothing is happening. If RatatuiRuby.poll_event returned nil, you would need nil-checks: event&.key?, next unless event.

This class eliminates that friction. It responds to every predicate with false. Call none? to detect it explicitly. Pattern-match on type: :none for exhaustive dispatch.

Use it to simplify your event loop. No guards. Optional ‘else` clauses.

See Martin Fowler’s Special Case pattern.

Predicate Example

– SPDX-SnippetBegin SPDX-FileCopyrightText: 2025 Kerrick Long SPDX-License-Identifier: MIT-0 ++

event = RatatuiRuby.poll_event
break if event.ctrl_c?
redraw if event.none?

– SPDX-SnippetEnd ++

Pattern Matching Example

redraw if RatatuiRuby.poll_event in type: :none

Instance Method Summary collapse

Methods inherited from RatatuiRuby::Event

#focus_gained?, #focus_lost?, #key?, #method_missing, #mouse?, #paste?, #resize?, #respond_to_missing?, #sync?

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class RatatuiRuby::Event

Instance Method Details

#deconstruct_keys(keys) ⇒ Object

Deconstructs the event for pattern matching.



48
49
50
 
# File 'lib/ratatui_ruby/event/none.rb', line 48

def deconstruct_keys(keys)
  { type: :none }
end

#none? ⇒ Boolean

Returns true for None events.

Returns:

  • (Boolean) 


43
44
45
 
# File 'lib/ratatui_ruby/event/none.rb', line 43

def none?
  true
end