Module: Preact::FunctionComponent::Api

Defined in:
lib/isomorfeus_preact/preact/function_component/api.rb

Instance Method Summary collapse

Instance Method Details

#get_preact_element(arg, &block) ⇒ Object Also known as: gpe 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 78

def get_preact_element(arg, &block)
  if block_given?
    # execute block, fetch last element from buffer
    %x{
      let last_buffer_length = Opal.Preact.render_buffer[Opal.Preact.render_buffer.length - 1].length;
      let last_buffer_element = Opal.Preact.render_buffer[Opal.Preact.render_buffer.length - 1][last_buffer_length - 1];
      block.$call();
      // console.log("get_preact_element popping", Opal.Preact.render_buffer, Opal.Preact.render_buffer.toString())
      let new_element = Opal.Preact.render_buffer[Opal.Preact.render_buffer.length - 1].pop();
      if (last_buffer_element === new_element) { #{Isomorfeus.raise_error(message: "Block did not create any Preact element!")} }
      return new_element;
    }
  else
    # element was rendered before being passed as arg
    # fetch last element from buffer
    # `console.log("get_preact_element popping", Opal.Preact.render_buffer, Opal.Preact.render_buffer.toString())`
    `Opal.Preact.render_buffer[Opal.Preact.render_buffer.length - 1].pop()`
  end
end

#method_ref(method_symbol, *args) ⇒ Object Also known as: m_ref 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 107

def method_ref(method_symbol, *args)
  method_key = "#{method_symbol}#{args}"
  %x{
    if (#{self}.method_refs && #{self}.method_refs[#{method_key}]) { return #{self}.method_refs[#{method_key}]; }
    if (!#{self}.method_refs) { #{self}.method_refs = {}; }
    #{self}.method_refs[#{method_key}] = { m: #{method(method_symbol)}, a: args };
    return #{self}.method_refs[#{method_key}];
  }
end

#props ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 4

def props
  @native_props
end

#render_preact_element(el) ⇒ Object Also known as: rpe 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 99

def render_preact_element(el)
  # push el to buffer
  `Opal.Preact.render_buffer[Opal.Preact.render_buffer.length - 1].push(el)`
  # `console.log("render_preact_element pushed", Opal.Preact.render_buffer, Opal.Preact.render_buffer.toString())`
  nil
end

#to_n ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 118

def to_n
  self
end

#use_callback(*deps, &block) ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 8

def use_callback(*deps, &block)
  `Opal.global.PreactHooks.useCallback(function() { #{block.call} }, deps)`
end

#use_context(context) ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 12

def use_context(context)
  native_context = `(typeof context.$is_wrapped_context !== 'undefined')` ? context.to_n : context
  `Opal.global.PreactHooks.useContext(native_context)`
end

#use_debug_value(value, formatter) ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 17

def use_debug_value(value, formatter)
  formatter = `null` unless formatter
  `Opal.global.PreactHooks.useDebugValue(value, formatter)`
end

#use_effect(*args, &block) ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 22

def use_effect(*args, &block)
  `Opal.global.PreactHooks.useEffect(function() { #{block.call} }, args)`
end

#use_error_boundary(&block) ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 26

def use_error_boundary(&block)
  error = nil
  reset_error = nil
  %x{
    let _error;
    let _reset_error;
    if (block) {
      [_error, reset_error] = Opal.global.PreactHooks.useErrorBoundary(function() { #{block.call(Error(_error))} });
    } else {
      [_error, reset_error] = Opal.global.PreactHooks.useErrorBoundary();
    }
    error = #{Error(e)};
  }
  [error, reset_error]
end

#use_imperative_handle(ruby_ref, *args, &block) ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 42

def use_imperative_handle(ruby_ref, *args, &block)
  ref = ruby_ref.to_n
  args = `null` if args.empty?
  `Opal.global.PreactHooks.useImperativeHandle(ref, function() { #{block.call} }, args)`
end

#use_layout_effect(&block) ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 48

def use_layout_effect(&block)
  `Opal.global.PreactHooks.useLayoutEffect(function() { #{block.call} })`
end

#use_memo(*deps, &block) ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 52

def use_memo(*deps, &block)
  `Opal.global.PreactHooks.useMemo(function() { #{block.call} }, deps)`
end

#use_reducer(inital_state, &block) ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 56

def use_reducer(inital_state, &block)
  state = nil
  dispatcher = nil
  %x{
    [state, dispatcher] = Opal.global.PreactHooks.useReducer(function(state, action) {
      #{block.call(state, action)}
    }, initial_state);
  }
  [state, proc { |arg| `dispatcher(arg)` }]
end

#use_ref(native_ref) ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 67

def use_ref(native_ref)
  Preact::Ref.new(`Opal.global.PreactHooks.useRef(native_ref)`)
end

#use_state(initial_value) ⇒ Object 



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# File 'lib/isomorfeus_preact/preact/function_component/api.rb', line 71

def use_state(initial_value)
  initial = nil
  setter = nil
  `[initial, setter] = Opal.global.PreactHooks.useState(initial_value);`
  [initial, proc { |arg| `setter(arg)` }]
end