Module: React::Component::Resolution

Included in:
Object
Defined in:
lib/react/component/resolution.rb

Class Method Summary collapse

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(component_name, *args, &block) ⇒ Object 



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# File 'lib/react/component/resolution.rb', line 70

def method_missing(component_name, *args, &block)
  # html tags are defined as methods, so they will not end up here.
  # first check for native component and render it, we want to be fast for native components
  # second check for ruby component and render it, they are a bit slower anyway
  # third pass on method missing
  # language=JS
  %x{
    var component = null;
    if (typeof Opal.global[component_name] !== "undefined" && (component_name[0] === component_name[0].toUpperCase())) {
      component = Opal.global[component_name];
    } else {
      var modules = self.$to_s().split("::");
      var modules_length = modules.length;
      var module;
      var constant;
      for (var i = modules_length; i > 0; i--) {
        try {
          module = modules.slice(0, i).join('::');
          constant = self.$class().$const_get(module).$const_get(component_name, false);
          if (typeof constant.react_component !== 'undefined') {
            component = constant.react_component;
            break;
          }
        } catch(err) { component = null; }
      }
      if (!component) {
        try {
          constant = Opal.Object.$const_get(component_name);
          if (typeof constant.react_component !== 'undefined') {
            component = constant.react_component;
          }
        } catch(err) { component = null; }
      }
    }
    if (component) {
      return Opal.React.internal_prepare_args_and_render(component, args, block);
    } else {
      return #{_react_component_resolution_original_method_missing(component_name, *args, block)};
    }
  }
end

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/react/component/resolution.rb', line 4

def self.included(base)
  base.instance_exec do
    alias _react_component_class_resolution_original_const_missing const_missing

    def const_missing(const_name)
      # language=JS
      %x{
        if (typeof Opal.global[const_name] !== "undefined" && (const_name[0] === const_name[0].toUpperCase())) {
          var new_const = #{React::NativeConstantWrapper.new(`Opal.global[const_name]`, const_name)};
          #{Object.const_set(const_name, `new_const`)};
          return new_const;
        } else {
          return #{_react_component_class_resolution_original_const_missing(const_name)};
        }
      }
    end

    # this is required for autoloading support, as the component may not be loaded and so its method is not registered.
    # must load it first, done by const_get, and next time the method will be there.

    unless method_defined?(:_react_component_class_resolution_original_method_missing)
      alias _react_component_class_resolution_original_method_missing method_missing
    end

    def method_missing(component_name, *args, &block)
      # check for ruby component and render it
      # otherwise pass on method missing
      # language=JS
      %x{
        var modules = self.$to_s().split("::");
        var modules_length = modules.length;
        var module;
        var constant;
        var component;
        for (var i = modules_length; i > 0; i--) {
          try {
            module = modules.slice(0, i).join('::');
            constant = self.$const_get(module).$const_get(component_name, false);
            if (typeof constant.react_component !== 'undefined') {
              component = constant.react_component;
              break;
            }
          } catch(err) { component = null; }
        }
        if (!component) {
          try {
            constant = Opal.Object.$const_get(component_name);
            if (typeof constant.react_component !== 'undefined') {
              component = constant.react_component;
            }
          } catch(err) { component = null; }
        }
        if (component) {
          return Opal.React.internal_prepare_args_and_render(component, args, block);
        } else {
          return #{_react_component_class_resolution_original_method_missing(component_name, *args, block)};
        }
      }
    end
  end
end

Instance Method Details

#_react_component_resolution_original_method_missing ⇒ Object 



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# File 'lib/react/component/resolution.rb', line 67

alias _react_component_resolution_original_method_missing method_missing