[improvement] rename packages dir to src (#3659)

src/utils/create/component.ts

@@ -0,0 +1,101 @@
+/**
+ * Create a basic component with common options
+ */
+import '../../locale';
+import { camelize } from '../format/string';
+import { SlotsMixin } from '../../mixins/slots';
+import Vue, { VNode, VueConstructor, ComponentOptions, RenderContext } from 'vue';
+import { DefaultProps, FunctionComponent } from '../types';
+
+export interface VantComponentOptions extends ComponentOptions<Vue> {
+  functional?: boolean;
+  install?: (Vue: VueConstructor) => void;
+}
+
+export type TsxBaseProps<Slots> = {
+  key: string | number;
+  // hack for jsx prop spread
+  props: any;
+  class: any;
+  style: string | object[] | object;
+  scopedSlots: Slots;
+};
+
+export type TsxComponent<Props, Events, Slots> = (
+  props: Partial<Props & Events & TsxBaseProps<Slots>>
+) => VNode;
+
+const arrayProp = {
+  type: Array,
+  default: () => []
+};
+
+const numberProp = {
+  type: Number,
+  default: 0
+};
+
+function defaultProps(props: any) {
+  Object.keys(props).forEach(key => {
+    if (props[key] === Array) {
+      props[key] = arrayProp;
+    } else if (props[key] === Number) {
+      props[key] = numberProp;
+    }
+  });
+}
+
+function install(this: ComponentOptions<Vue>, Vue: VueConstructor) {
+  const { name } = this;
+  Vue.component(name as string, this);
+  Vue.component(camelize(`-${name}`), this);
+}
+
+// unify slots & scopedSlots
+export function unifySlots(context: RenderContext) {
+  // use data.scopedSlots in lower Vue version
+  const scopedSlots = context.scopedSlots || context.data.scopedSlots || {};
+  const slots = context.slots();
+
+  Object.keys(slots).forEach(key => {
+    if (!scopedSlots[key]) {
+      scopedSlots[key] = () => slots[key];
+    }
+  });
+
+  return scopedSlots;
+}
+
+// should be removed after Vue 3
+function transformFunctionComponent(pure: FunctionComponent): VantComponentOptions {
+  return {
+    functional: true,
+    props: pure.props,
+    model: pure.model,
+    render: (h, context): any => pure(h, context.props, unifySlots(context), context)
+  };
+}
+
+export function createComponent(name: string) {
+  return function<Props = DefaultProps, Events = {}, Slots = {}> (
+    sfc: VantComponentOptions | FunctionComponent
+  ): TsxComponent<Props, Events, Slots> {
+    if (typeof sfc === 'function') {
+      sfc = transformFunctionComponent(sfc);
+    }
+
+    if (!sfc.functional) {
+      sfc.mixins = sfc.mixins || [];
+      sfc.mixins.push(SlotsMixin);
+    }
+
+    if (sfc.props) {
+      defaultProps(sfc.props);
+    }
+
+    sfc.name = name;
+    sfc.install = install;
+
+    return sfc as TsxComponent<Props, Events, Slots>;
+  };
+}