Module: LucidComponent::NativeLucidComponentConstructor

Defined in:
lib/lucid_component/native_lucid_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_lucid_component_constructor.rb', line 6

def self.extended(base)
  component_name = base.to_s
  # language=JS
  %x{
    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};
      }
      static set displayName(new_name) {
        // dont do anything here except returning the set value
        return new_name;
      }
      render() {
        const oper = Opal.React;
        oper.render_buffer.push([]);
        // console.log("lucid component pushed", oper.render_buffer, oper.render_buffer.toString());
        oper.active_components.push(this);
        oper.active_redux_components.push(this);
        let block_result;
        if (base.preload_block && base.while_loading_block && !this.state.preloaded) { block_result = #{`this.__ruby_instance`.instance_exec(&`base.while_loading_block`)}; }
        else { block_result = #{`this.__ruby_instance`.instance_exec(&`base.render_block`)}; }
        if (block_result && (block_result.constructor === String || block_result.constructor === Number)) { oper.render_buffer[oper.render_buffer.length - 1].push(block_result); }
        oper.active_redux_components.pop();
        oper.active_components.pop();
        // console.log("lucid component popping", oper.render_buffer, oper.render_buffer.toString());
        if (base.except_ssr) {
          if (typeof block_result === "object" && block_result.danger) { return Opal.global.React.createElement('div', {'data-ssrhelper': this.__ruby_instance.$class().$to_s(), dangerouslySetInnerHTML: { __html: block_result.html}});}
          else { return Opal.global.React.createElement('div', {'data-ssrhelper': this.__ruby_instance.$class().$to_s()}, oper.render_buffer.pop()); }
        }
        return oper.render_buffer.pop();
      }
      data_access() {
        return this.props.store;
      }
      shouldComponentUpdate(next_props, next_state) {
        let counter = 0;
        for (var property in next_props) {
          counter++;
          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]['$!='] === "function" &&
                     typeof this.props[property] !== "undefined" && this.props[property] !== null ) {
              if (#{ !! (`next_props[property]` != `this.props[property]`) }) { return true; }
            } else if (next_props[property] !== this.props[property]) { return true; }
          }
        }
        if (counter !== Object.keys(this.props).length) { return true; }
        counter = 0;
        for (var property in next_state) {
          counter++;
          if (next_state.hasOwnProperty(property)) {
            if (!this.state.hasOwnProperty(property)) { return true; };
            if (typeof next_state[property] !== "undefined" && next_state[property] !== null && typeof next_state[property]['$!='] === "function" &&
                typeof this.state[property] !== "undefined" && this.state[property] !== null) {
              if (#{ !! (`next_state[property]` != `this.state[property]`) }) { return true }
            } else if (next_state[property] !== this.state[property]) { return true }
          }
        }
        if (counter !== Object.keys(this.state).length) { return true; }
        return false;
      }
      validateProp(props, propName, componentName) {
        try { base.$validate_prop(propName, props[propName]) }
        catch (e) { return new Error(componentName + " Error: prop validation failed: " + e.message); }
        return null;
      }
    };
    base.preload_block = null;
    base.while_loading_block = null;
    base.jss_styles = null;
    base.use_styles = null;
    base.store_updates = true;
  }
end