Module: LucidComponent::NativeComponentConstructor

Defined in:
lib/lucid_component/native_component_constructor.rb

Class Method Summary collapse

Class Method Details

.extended(base) ⇒ Object

for should_component_update we apply ruby semantics for comparing props to do so, we convert the props to ruby hashes and then compare this makes sure, that for example rubys Nil object gets handled properly



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# File 'lib/lucid_component/native_component_constructor.rb', line 6

def self.extended(base)
  component_name = base.to_s
  # language=JS
  %x{
    base.react_component = function(props) {
      return Opal.global.React.createElement(Opal.global.LucidApplicationContext.Consumer, null, function(store) {
        var store_props = Object.assign({}, props, { isomorfeus_store: store });
        return Opal.global.React.createElement(base.lucid_react_component, store_props);
      });
    }
    base.lucid_react_component = class extends Opal.global.React.Component {
      constructor(props) {
        super(props);
        if (base.$default_state_defined()) {
          this.state = base.$state().$to_n();
        } else {
          this.state = {};
        };
        this.__ruby_instance = base.$new(this);
        this.__object_id = this.__ruby_instance.$object_id().$to_s();
        if (!this.state.component_state) {
          this.state.component_state = {};
          this.state.component_state[this.__object_id] = {};
        };
        var event_handlers = #{base.event_handlers};
        for (var i = 0; i < event_handlers.length; i++) {
          this[event_handlers[i]] = this[event_handlers[i]].bind(this);
        }
        var defined_refs = #{base.defined_refs};
        for (var ref in defined_refs) {
          if (defined_refs[ref] != null) {
            this[ref] = function(element) {
              element = Opal.React.native_element_or_component_to_ruby(element);
              #{`this.__ruby_instance`.instance_exec(`element`, &`defined_refs[ref]`)}
            }
            this[ref] = this[ref].bind(this);
          } else {
            this[ref] = Opal.global.React.createRef();
          }
        }
      }
      static get displayName() {
        return #{component_name};
      }
      render() {
        Opal.React.render_buffer.push([]);
        Opal.React.active_components.push(this);
        Opal.React.active_redux_components.push(this);
        this.used_store_paths = [];
        #{`this.__ruby_instance`.instance_exec(&`base.render_block`)};
        Opal.React.active_redux_components.pop();
        Opal.React.active_components.pop();
        return Opal.React.render_buffer.pop();
      }
      data_access() {
        return this.props.isomorfeus_store
      }
      register_used_store_path(path) {
        this.used_store_paths.push(path);
      }
      shouldComponentUpdate(next_props, next_state) {
        var next_props_keys = Object.keys(next_props);
        var this_props_keys = Object.keys(this.props);
        if (next_props_keys.length !== this_props_keys.length) { return true; }

        var next_state_keys = Object.keys(next_state);
        var this_state_keys = Object.keys(this.state);
        if (next_state_keys.length !== this_state_keys.length) { return true; }

        var used_store_result;
        for (var property in next_props) {
          if (property === "isomorfeus_store") {
            used_store_result = this.scu_for_used_store_paths(this, this.state.isomorfeus_store, next_state.isomorfeus_store);
            if (used_store_result) {
              return true;
            }
          } else if (next_props.hasOwnProperty(property)) {
            if (!this.props.hasOwnProperty(property)) { return true; };
            if (property == "children") { if (next_props.children !== this.props.children) { return true; }}
            else if (typeof next_props[property] !== "undefined" && next_props[property] !== null &&
                     typeof next_props[property]['$!='] !== "undefined" &&
                     typeof this.props[property] !== "undefined" && this.props[property] !== null &&
                     typeof this.props[property]['$!='] !== "undefined") {
              if (#{ !! (`next_props[property]` != `this.props[property]`) }) { return true; };
            } else if (next_props[property] !== this.props[property]) { return true; };
          }
        }
        for (var property in next_state) {
          if (next_state.hasOwnProperty(property)) {
            if (!this.state.hasOwnProperty(property)) { return true; };
            if (next_state[property] !== null && typeof next_state[property]['$!='] !== "undefined" &&
                this.state[property] !== null && typeof this.state[property]['$!='] !== "undefined") {
              if (#{ !! (`next_state[property]` != `this.state[property]`) }) { return true };
            } else if (next_state[property] !== this.state[property]) { return true };
          }
        }
        return false;
      }
      scu_for_used_store_paths(self, current_state, next_state) {
        var unique_used_store_paths = self.used_store_paths.filter(function(elem, pos, paths) {
          return (paths.indexOf(elem) === pos);
        });
        var used_length = unique_used_store_paths.length;
        var store_path;
        var current_value;
        var next_value;
        var store_path_last;
        for (var i = 0; i < used_length; i++) {
          store_path = unique_used_store_paths[i];
          store_path_last = store_path.length - 1;
          if (store_path[store_path_last].constructor === Array) {
            store_path[store_path_last] = JSON.stringify(store_path[store_path_last]);
          }
          current_value = store_path.reduce(function(prev, curr) { return prev && prev[curr]; }, current_state);
          next_value = store_path.reduce(function(prev, curr) { return prev && prev[curr]; }, next_state);
          if (current_value !== next_value) { return true; };
        }
        return false;
      }
      validateProp(props, propName, componentName) {
        if (propName === "isomorfeus_store") { return null };
        var prop_data = base.lucid_react_component.propValidations[propName];
        if (!prop_data) { return true; };
        var value = props[propName];
        var result;
        if (typeof prop_data.ruby_class != "undefined") {
          result = (value.$class() == prop_data.ruby_class);
          if (!result) {
            return new Error('Invalid prop ' + propName + '! Expected ' + prop_data.ruby_class.$to_s() + ' but was ' + value.$class().$to_s() + '!');
          }
        } else if (typeof prop_data.is_a != "undefined") {
          result = value["$is_a?"](prop_data.is_a);
          if (!result) {
            return new Error('Invalid prop ' + propName + '! Expected a child of ' + prop_data.is_a.$to_s() + '!');
          }
        }
        if (typeof prop_data.required != "undefined") {
          if (prop_data.required && (typeof props[propName] == "undefined")) {
            return new Error('Prop ' + propName + ' is required but not given!');
          }
        }
        return null;
      }
    }
    base.lucid_react_component.contextType = Opal.global.LucidApplicationContext;
  }
end