Improve TS for `Components.addType`. Closes #5053

src/common/index.ts

@@ -35,3 +35,7 @@ export class Model<T extends ObjectHash = any, S = SetOptions, E = any> extends
 export class Collection<T extends Model = Model> extends Backbone.Collection<T> {}
 
 export class View<T extends Model | undefined = Model, E extends Element = HTMLElement> extends Backbone.View<T, E> {}
+
+export type PickMatching<T, V> = { [K in keyof T as T[K] extends V ? K : never]: T[K] };
+
+export type ExtractMethods<T> = PickMatching<T, Function>;

src/dom_components/index.ts

@@ -54,9 +54,9 @@
  */
 import { isEmpty, isObject, isArray, isFunction, isString, result, debounce } from 'underscore';
 import defaults, { DomComponentsConfig } from './config/config';
-import Component, { keyUpdate, keyUpdateInside } from './model/Component';
+import Component, { IComponent, keyUpdate, keyUpdateInside } from './model/Component';
 import Components from './model/Components';
-import ComponentView from './view/ComponentView';
+import ComponentView, { IComponentView } from './view/ComponentView';
 import ComponentWrapperView from './view/ComponentWrapperView';
 import ComponentsView from './view/ComponentsView';
 import ComponentTableCell from './model/ComponentTableCell';
@@ -97,7 +97,7 @@ import ComponentFrame from './model/ComponentFrame';
 import ComponentFrameView from './view/ComponentFrameView';
 import { ItemManagerModule } from '../abstract/Module';
 import EditorModel from '../editor/model/Editor';
-import { ComponentAdd } from './model/types';
+import { ComponentAdd, ComponentDefinitionDefined } from './model/types';
 
 export type ComponentEvent =
   | 'component:create'
@@ -117,6 +117,25 @@ export type ComponentEvent =
   | 'component:drag'
   | 'component:drag:end';
 
+export interface ComponentModelDefinition extends IComponent {
+  defaults?: ComponentDefinitionDefined;
+  [key: string]: any;
+}
+
+export interface ComponentViewDefinition extends IComponentView {
+  [key: string]: any;
+}
+
+export interface AddComponentTypeOptions {
+  isComponent?: (el: HTMLElement) => boolean | ComponentDefinitionDefined | undefined;
+  model?: Partial<ComponentModelDefinition> & ThisType<ComponentModelDefinition & Component>;
+  view?: Partial<ComponentViewDefinition> & ThisType<ComponentViewDefinition & ComponentView>;
+  extend?: string;
+  extendView?: string;
+  extendFn?: string[];
+  extendFnView?: string[];
+}
+
 export default class ComponentManager extends ItemManagerModule<DomComponentsConfig, any> {
   componentTypes = [
     {
@@ -433,12 +452,12 @@ export default class ComponentManager extends ItemManagerModule<DomComponentsCon
    * @param {Object} methods Component methods
    * @return {this}
    */
-  addType(type: string, methods: any) {
+  addType(type: string, methods: AddComponentTypeOptions) {
     const { em } = this;
     const { model = {}, view = {}, isComponent, extend, extendView, extendFn = [], extendFnView = [] } = methods;
     const compType = this.getType(type);
-    const extendType = this.getType(extend);
-    const extendViewType = this.getType(extendView);
+    const extendType = this.getType(extend!);
+    const extendViewType = this.getType(extendView!);
     const typeToExtend = extendType ? extendType : compType ? compType : this.getType('default');
     const modelToExt = typeToExtend.model;
     const viewToExt = extendViewType ? extendViewType.view : typeToExtend.view;
@@ -460,6 +479,7 @@ export default class ComponentManager extends ItemManagerModule<DomComponentsCon
     // If the model/view is a simple object I need to extend it
     if (typeof model === 'object') {
       const defaults = result(model, 'defaults');
+      // @ts-ignore
       delete model.defaults;
       methods.model = modelToExt.extend(
         {
@@ -470,6 +490,7 @@ export default class ComponentManager extends ItemManagerModule<DomComponentsCon
           isComponent: compType && !extendType && !isComponent ? modelToExt.isComponent : isComponent || (() => 0),
         }
       );
+      // @ts-ignore
       Object.defineProperty(methods.model.prototype, 'defaults', {
         value: {
           ...(result(modelToExt.prototype, 'defaults') || {}),
@@ -489,8 +510,9 @@ export default class ComponentManager extends ItemManagerModule<DomComponentsCon
       compType.model = methods.model;
       compType.view = methods.view;
     } else {
+      // @ts-ignore
       methods.id = type;
-      this.componentTypes.unshift(methods);
+      this.componentTypes.unshift(methods as any);
     }
 
     const event = `component:type:${compType ? 'update' : 'add'}`;

src/dom_components/model/Component.ts

@@ -32,11 +32,13 @@ import {
 import Frame from '../../canvas/model/Frame';
 import { DomComponentsConfig } from '../config/config';
 import ComponentView from '../view/ComponentView';
-import { AddOptions, ObjectAny, ObjectStrings, SetOptions } from '../../common';
-import CssRule, { CssRuleJSON, CssRuleProperties } from '../../css_composer/model/CssRule';
+import { AddOptions, ExtractMethods, ObjectAny, ObjectStrings, SetOptions } from '../../common';
+import CssRule, { CssRuleJSON } from '../../css_composer/model/CssRule';
 import Trait, { TraitProperties } from '../../trait_manager/model/Trait';
 import { ToolbarButtonProps } from './ToolbarButton';
 
+export interface IComponent extends ExtractMethods<Component> {}
+
 const escapeRegExp = (str: string) => {
   return str.replace(/[|\\{}()[\]^$+*?.]/g, '\\$&');
 };

src/dom_components/view/ComponentView.ts

@@ -5,7 +5,7 @@ import ComponentsView from './ComponentsView';
 import Selectors from '../../selector_manager/model/Selectors';
 import { replaceWith } from '../../utils/dom';
 import { setViewEl } from '../../utils/mixins';
-import { ObjectAny, View } from '../../common';
+import { ExtractMethods, ObjectAny, View } from '../../common';
 import { ComponentOptions } from '../model/types';
 import EditorModel from '../../editor/model/Editor';
 import { DomComponentsConfig } from '../config/config';
@@ -20,6 +20,8 @@ interface Rect {
   right?: number;
 }
 
+export interface IComponentView extends ExtractMethods<ComponentView> {}
+
 export default class ComponentView extends View</**
  * Keep this format to avoid errors in TS bundler */
 /** @ts-ignore */