341 lines
11 KiB
Vue
341 lines
11 KiB
Vue
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<template>
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<view
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class="u-textarea"
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:class="[
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{
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'u-textarea--error': validateState
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},
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textareaClass,
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customClass
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]"
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:style="$u.toStyle(textareaStyle, customStyle)"
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>
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<!-- prettier-ignore -->
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<textarea
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class="u-textarea__field"
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:value="innerValue"
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:style="getStyle"
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:placeholder="String(props.placeholder)"
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:placeholder-style="$u.toStyle(props.placeholderStyle)"
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:placeholder-class="props.placeholderClass"
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:disabled="props.disabled"
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:focus="props.focus"
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:autoHeight="props.autoHeight"
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:fixed="props.fixed"
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:cursorSpacing="props.cursorSpacing"
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:cursor="Number(props.cursor)"
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:showConfirmBar="props.showConfirmBar"
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:selectionStart="props.selectionStart"
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:selectionEnd="props.selectionEnd"
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:adjustPosition="props.adjustPosition"
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:disableDefaultPadding="props.disableDefaultPadding"
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:holdKeyboard="props.holdKeyboard"
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:maxlength="Number(props.maxlength)"
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:confirmType="(props.confirmType as any)"
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:ignoreCompositionEvent="props.ignoreCompositionEvent"
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@focus="onFocus"
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@blur="onBlur"
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@linechange="onLinechange"
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@input="onInput"
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@confirm="onConfirm"
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@keyboardheightchange="onKeyboardheightchange"
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></textarea>
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<text
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class="u-textarea__count"
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:style="{
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'background-color': props.disabled ? 'transparent' : 'var(--u-bg-white)'
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}"
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v-if="props.count"
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>
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{{ innerValue.length }}/{{ props.maxlength }}
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</text>
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<view class="u-textarea__right-icon u-flex">
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<view
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class="u-textarea__right-icon__clear u-textarea__right-icon__item"
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v-if="clearable && modelValue != '' && !disabled"
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>
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<u-icon size="32" name="close-circle-fill" color="var(--u-light-color)" @click="onClear" />
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</view>
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</view>
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</view>
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</template>
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<script lang="ts">
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export default {
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name: 'u-textarea',
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options: {
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addGlobalClass: true,
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// #ifndef MP-TOUTIAO
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virtualHost: true,
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// #endif
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styleIsolation: 'shared'
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}
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};
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</script>
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<script setup lang="ts">
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import { ref, computed, watch, nextTick } from 'vue';
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import { TextareaProps } from './types';
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import { $u, useChildren } from '../../';
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/**
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* Textarea 文本域
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* @description 文本域此组件满足了可能出现的表单信息补充，编辑等实际逻辑的功能，内置了字数校验等
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* @tutorial https://uviewpro.cn/zh/components/textarea.html
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* @property {String | Number} value 输入框的内容
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* @property {String | Number} placeholder 输入框为空时占位符
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* @property {String} placeholderClass 指定placeholder的样式类，注意页面或组件的style中写了scoped时，需要在类名前写/deep/ （ 默认 'input-placeholder' ）
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* @property {String | Object} placeholderStyle 指定placeholder的样式，字符串/对象形式，如"color: red;"
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* @property {String | Number} height 输入框高度（默认 70 ）
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* @property {String} confirmType 设置键盘右下角按钮的文字，仅微信小程序，App-vue和H5有效（默认 'done' ）
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* @property {Boolean} disabled 是否禁用（默认 false ）
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* @property {Boolean} count 是否显示统计字数（默认 false ）
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* @property {Boolean} focus 是否自动获取焦点，nvue不支持，H5取决于浏览器的实现（默认 false ）
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* @property {Boolean | Function} autoHeight 是否自动增加高度（默认 false ）
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* @property {Boolean} fixed 如果textarea是在一个position:fixed的区域，需要显示指定属性fixed为true（默认 false ）
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* @property {Number} cursorSpacing 指定光标与键盘的距离（默认 0 ）
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* @property {String | Number} cursor 指定focus时的光标位置
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* @property {Function} formatter 内容式化函数
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* @property {Boolean} showConfirmBar 是否显示键盘上方带有”完成“按钮那一栏，（默认 true ）
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* @property {Number} selectionStart 光标起始位置，自动聚焦时有效，需与selection-end搭配使用，（默认 -1 ）
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* @property {Number | Number} selectionEnd 光标结束位置，自动聚焦时有效，需与selection-start搭配使用（默认 -1 ）
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* @property {Boolean} adjustPosition 键盘弹起时，是否自动上推页面（默认 true ）
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* @property {Boolean | Number} disableDefaultPadding 是否去掉 iOS 下的默认内边距，只微信小程序有效（默认 false ）
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* @property {Boolean} holdKeyboard focus时，点击页面的时候不收起键盘，只微信小程序有效（默认 false ）
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* @property {String | Number} maxlength 最大输入长度，设置为 -1 的时候不限制最大长度（默认 140 ）
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* @property {String} border 边框类型，surround-四周边框，none-无边框，bottom-底部边框（默认 'surround' ）
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* @property {Boolean} ignoreCompositionEvent 是否忽略组件内对文本合成系统事件的处理
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* @event {Function(e)} focus 输入框聚焦时触发，event.detail = { value, height }，height 为键盘高度
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* @event {Function(e)} blur 输入框失去焦点时触发，event.detail = {value, cursor}
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* @event {Function(e)} linechange 输入框行数变化时调用，event.detail = {height: 0, heightRpx: 0, lineCount: 0}
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* @event {Function(e)} input 当键盘输入时，触发 input 事件
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* @event {Function(e)} confirm 点击完成时， 触发 confirm 事件
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* @event {Function(e)} keyboardheightchange 键盘高度发生变化的时候触发此事件
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* @example <u-textarea v-model="value1" placeholder="请输入内容" ></u-textarea>
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*/
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const props = defineProps(TextareaProps);
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const emit = defineEmits([
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'update:modelValue',
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'focus',
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'blur',
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'linechange',
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'input',
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'confirm',
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'keyboardheightchange',
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'change'
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]);
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const { emitToParent } = useChildren('u-textarea', 'u-form-item');
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// state
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const innerValue = ref('');
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const focused = ref(false);
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const firstChange = ref(true);
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const changeFromInner = ref(false);
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const innerFormatter = ref((v: any) => v);
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const validateState = ref(props.validateState); // 当前input的验证状态，用于错误时，边框是否改为红色
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// watch value prop
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watch(
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() => props.modelValue,
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(newVal: any) => {
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innerValue.value = newVal;
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/* #ifdef H5 */
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// 在H5中，外部value变化后，修改input中的值，不会触发@input事件，此时手动调用值变化方法
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if (firstChange.value === false && changeFromInner.value === false) {
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valueChange();
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}
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/* #endif */
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firstChange.value = false;
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// 重置changeFromInner的值为false，标识下一次引起默认为外部引起的
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changeFromInner.value = false;
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},
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{ immediate: true }
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);
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// 监听 validateState 变化
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watch(
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() => props.validateState,
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val => {
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validateState.value = val;
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}
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);
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// 组件的类名
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const textareaClass = computed(() => {
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let classes: string[] = [];
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if (props.border && props.border !== 'none') {
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if (props.border === 'surround') {
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classes = classes.concat(['u-textarea--border', 'u-textarea--radius']);
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} else if (props.border === 'bottom') {
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classes = classes.concat(['u-border-bottom', 'u-textarea--no-radius']);
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} else {
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classes = classes.concat(['u-textarea--border', 'u-textarea--radius']);
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}
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}
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props.disabled && classes.push('u-textarea--disabled');
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return classes.join(' ');
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});
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// 组件的样式
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const textareaStyle = computed(() => {
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const style: Record<string, any> = {};
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if (props.border && props.border !== 'none') {
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style.padding = `${props.border ? 20 : 0}rpx`;
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}
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// #ifdef APP-NVUE
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if ($u.os() === 'android') {
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style.paddingTop = '6px';
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style.paddingLeft = '9px';
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style.paddingBottom = '3px';
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style.paddingRight = '6px';
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}
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// #endif
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return style;
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});
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const getStyle = computed(() => {
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let style: Record<string, any> = {};
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// 如果没有自定义高度，就根据textarea来分配一个默认的高度
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if (props.autoHeight) {
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style.minHeight = $u.addUnit(props.height || '100rpx');
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style.height = 'auto';
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} else {
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style.height = $u.addUnit(props.height);
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}
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return $u.toStyle(style, props.customStyle);
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});
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function onFormItemError(status: boolean) {
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validateState.value = status;
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}
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// methods
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function setFormatter(e: any) {
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innerFormatter.value = e;
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}
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function onFocus(e: any) {
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emit('focus', e);
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}
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function onBlur(e: any) {
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setTimeout(() => {
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e.detail.value = innerValue.value;
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let value = e.detail.value;
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emit('blur', e);
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emitToParent('onFormBlur', value);
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}, 40);
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}
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function onLinechange(e: any) {
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emit('linechange', e);
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}
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function onInput(e: any) {
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let { value = '' } = e.detail || {};
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// 格式化过滤方法
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const formatter = props.formatter || innerFormatter.value;
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const formatValue = typeof formatter === 'function' ? formatter(value) : value;
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// 为了避免props的单向数据流特性，需要先将innerValue值设置为当前值，再在$nextTick中重新赋予设置后的值才有效
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innerValue.value = value;
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nextTick(() => {
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innerValue.value = formatValue;
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valueChange();
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});
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}
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function valueChange() {
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const value = innerValue.value;
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nextTick(() => {
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emit('input', value);
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emit('update:modelValue', value);
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// 标识value值的变化是由内部引起的
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changeFromInner.value = true;
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emit('change', value);
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emitToParent('onFormChange', value);
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});
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}
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function onConfirm(e: any) {
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emit('confirm', e);
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}
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function onKeyboardheightchange(e: any) {
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emit('keyboardheightchange', e);
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}
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function onClear(event: any) {
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try {
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event.stopPropagation();
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} catch (e) {
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console.log(e);
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}
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innerValue.value = '';
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valueChange();
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}
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defineExpose({
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onFormItemError
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});
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</script>
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<style lang="scss" scoped>
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@import '../../libs/css/style.components.scss';
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.u-textarea {
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border-radius: 4px;
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background-color: var(--u-bg-white);
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position: relative;
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@include flex;
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flex: 1;
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&--border {
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border-radius: 4px;
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border: 1px solid $u-border-color;
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}
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&--error {
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border-color: $u-type-error !important;
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}
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&--radius {
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border-radius: 4px;
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}
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&--no-radius {
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border-radius: 0;
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}
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&--disabled {
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background-color: $u-bg-gray-light;
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}
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&__field {
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flex: 1;
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font-size: 28rpx;
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color: $u-content-color;
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width: 100%;
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}
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&__count {
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position: absolute;
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right: 1px;
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bottom: 0;
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font-size: 12px;
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color: $u-tips-color;
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background-color: var(--u-bg-white);
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padding: 1px 4px;
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border-radius: 10px;
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line-height: 16px;
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}
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&__right-icon {
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&__item {
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margin-left: 10rpx;
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|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
</style>
|