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mdui

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实现 material you 设计规范的 Web Components 组件库

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import { __decorate } from "tslib"; import { html } from 'lit'; import { customElement, property, state } from 'lit/decorators.js'; import { ifDefined } from 'lit/directives/if-defined.js'; import { createRef, ref } from 'lit/directives/ref.js'; import { $ } from '@mdui/jq/$.js'; import '@mdui/jq/methods/closest.js'; import '@mdui/jq/methods/find.js'; import '@mdui/jq/methods/get.js'; import { MduiElement } from '@mdui/shared/base/mdui-element.js'; import { DefinedController } from '@mdui/shared/controllers/defined.js'; import { FormController, formResets } from '@mdui/shared/controllers/form.js'; import { defaultValue } from '@mdui/shared/decorators/default-value.js'; import { watch } from '@mdui/shared/decorators/watch.js'; import { booleanConverter } from '@mdui/shared/helpers/decorator.js'; import { componentStyle } from '@mdui/shared/lit-styles/component-style.js'; import { radioGroupStyle } from './radio-group-style.js'; /** * @summary 单选框组组件。需配合 `<mdui-radio>` 组件使用 * * ```html * <mdui-radio-group value="chinese"> * ..<mdui-radio value="chinese">Chinese</mdui-radio> * ..<mdui-radio value="english">English</mdui-radio> * </mdui-radio-group> * ``` * * @event change - 选中值变化时触发 * @event input - 选中值变化时触发 * @event invalid - 表单字段验证未通过时触发 * * @slot - `<mdui-radio>` 元素 */ let RadioGroup = class RadioGroup extends MduiElement { constructor() { super(...arguments); /** * 是否禁用此组件 */ this.disabled = false; /** * 单选框组的名称,将与表单数据一起提交 */ this.name = ''; /** * 单选框组的名称,将于表单数据一起提交 */ this.value = ''; /** * 默认选中的值。在重置表单时,将重置为该默认值。该属性只能通过 JavaScript 属性设置 */ this.defaultValue = ''; /** * 提交表单时,是否必须选中其中一个单选框 */ this.required = false; /** * 是否验证未通过 */ this.invalid = false; // 是否是初始状态,初始状态不显示动画 this.isInitial = true; this.inputRef = createRef(); this.formController = new FormController(this); this.definedController = new DefinedController(this, { relatedElements: ['mdui-radio'], }); } /** * 表单验证状态对象,具体参见 [`ValidityState`](https://developer.mozilla.org/zh-CN/docs/Web/API/ValidityState) */ get validity() { return this.inputRef.value.validity; } /** * 如果表单验证未通过,此属性将包含提示信息。如果验证通过,此属性将为空字符串 */ get validationMessage() { return this.inputRef.value.validationMessage; } // 为了使 <mdui-radio> 可以不是该组件的直接子元素,这里不用 @queryAssignedElements() get items() { return $(this).find('mdui-radio').get(); } get itemsEnabled() { return $(this) .find('mdui-radio:not([disabled])') .get(); } async onValueChange() { this.isInitial = false; await this.definedController.whenDefined(); this.emit('input'); this.emit('change'); this.updateItems(); this.updateRadioFocusable(); await this.updateComplete; // reset 引起的值变更,不执行验证;直接修改值引起的变更,需要进行验证 const form = this.formController.getForm(); if (form && formResets.get(form)?.has(this)) { this.invalid = false; formResets.get(form).delete(this); } else { this.invalid = !this.inputRef.value.checkValidity(); } } async onInvalidChange() { await this.definedController.whenDefined(); this.updateItems(); } /** * 检查表单字段是否通过验证。如果未通过,返回 `false` 并触发 `invalid` 事件;如果通过,返回 `true` */ checkValidity() { const valid = this.inputRef.value.checkValidity(); if (!valid) { this.emit('invalid', { bubbles: false, cancelable: true, composed: false, }); } return valid; } /** * 检查表单字段是否通过验证。如果未通过,返回 `false` 并触发 `invalid` 事件;如果通过,返回 `true`。 * * 如果验证未通过,还会在组件上显示验证失败的提示。 */ reportValidity() { this.invalid = !this.inputRef.value.reportValidity(); if (this.invalid) { const eventProceeded = this.emit('invalid', { bubbles: false, cancelable: true, composed: false, }); if (!eventProceeded) { // 调用了 preventDefault() 时,隐藏默认的表单错误提示 this.inputRef.value.blur(); this.inputRef.value.focus(); } } return !this.invalid; } /** * 设置自定义的错误提示文本。只要这个文本不为空,就表示字段未通过验证 * * @param message 自定义的错误提示文本 */ setCustomValidity(message) { this.inputRef.value.setCustomValidity(message); this.invalid = !this.inputRef.value.checkValidity(); } render() { return html `<fieldset><input ${ref(this.inputRef)} type="radio" class="input" name="${ifDefined(this.name)}" value="${ifDefined(this.value)}" .checked="${!!this.value}" .required="${this.required}" tabindex="-1" @keydown="${this.onKeyDown}"><slot @click="${this.onClick}" @keydown="${this.onKeyDown}" @slotchange="${this.onSlotChange}" @change="${this.onCheckedChange}"></slot></fieldset>`; } // 更新 mdui-radio 的 checked 后,需要更新可聚焦状态 // 同一个 mdui-radio-group 中的多个 mdui-radio,仅有一个可聚焦 // 若有已选中的,则已选中的可聚焦;若没有已选中的,则第一个可聚焦 updateRadioFocusable() { const items = this.items; const itemChecked = items.find((item) => item.checked); if (itemChecked) { items.forEach((item) => { item.focusable = item === itemChecked; }); } else { this.itemsEnabled.forEach((item, index) => { item.focusable = !index; }); } } async onClick(event) { await this.definedController.whenDefined(); const target = event.target; const item = target.closest('mdui-radio'); if (!item || item.disabled) { return; } this.value = item.value; await this.updateComplete; item.focus(); } /** * 在内部的 `<mdui-radio>` 上按下按键时,在 `<mdui-radio>` 之间切换焦点 */ async onKeyDown(event) { if (!['ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight', ' '].includes(event.key)) { return; } event.preventDefault(); await this.definedController.whenDefined(); const items = this.itemsEnabled; const itemChecked = items.find((item) => item.checked) ?? items[0]; const incr = event.key === ' ' ? 0 : ['ArrowUp', 'ArrowLeft'].includes(event.key) ? -1 : 1; let index = items.indexOf(itemChecked) + incr; if (index < 0) { index = items.length - 1; } if (index > items.length - 1) { index = 0; } this.value = items[index].value; await this.updateComplete; items[index].focus(); } async onSlotChange() { await this.definedController.whenDefined(); this.updateItems(); this.updateRadioFocusable(); } /** * slot 中的 mdui-radio 的 checked 变更时触发的事件 */ onCheckedChange(event) { event.stopPropagation(); } // 更新 <mdui-radio> 的状态 updateItems() { this.items.forEach((item) => { item.checked = item.value === this.value; item.invalid = this.invalid; item.groupDisabled = this.disabled; item.isInitial = this.isInitial; }); } }; RadioGroup.styles = [ componentStyle, radioGroupStyle, ]; __decorate([ property({ type: Boolean, reflect: true, converter: booleanConverter, }) ], RadioGroup.prototype, "disabled", void 0); __decorate([ property({ reflect: true }) ], RadioGroup.prototype, "form", void 0); __decorate([ property({ reflect: true }) ], RadioGroup.prototype, "name", void 0); __decorate([ property({ reflect: true }) ], RadioGroup.prototype, "value", void 0); __decorate([ defaultValue() ], RadioGroup.prototype, "defaultValue", void 0); __decorate([ property({ type: Boolean, reflect: true, converter: booleanConverter, }) ], RadioGroup.prototype, "required", void 0); __decorate([ state() ], RadioGroup.prototype, "invalid", void 0); __decorate([ watch('value', true) ], RadioGroup.prototype, "onValueChange", null); __decorate([ watch('invalid', true), watch('disabled') ], RadioGroup.prototype, "onInvalidChange", null); RadioGroup = __decorate([ customElement('mdui-radio-group') ], RadioGroup); export { RadioGroup };