dykj-football/uni_modules/uview-plus/components/u-textarea/u-textarea.vue
2024-04-17 15:27:43 +08:00

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<template>
<view class="u-textarea" :class="textareaClass" :style="[textareaStyle]">
<textarea
class="u-textarea__field"
:value="innerValue"
:style="{ height: addUnit(height) }"
:placeholder="placeholder"
:placeholder-style="addStyle(placeholderStyle, 'string')"
:placeholder-class="placeholderClass"
:disabled="disabled"
:focus="focus"
:autoHeight="autoHeight"
:fixed="fixed"
:cursorSpacing="cursorSpacing"
:cursor="cursor"
:showConfirmBar="showConfirmBar"
:selectionStart="selectionStart"
:selectionEnd="selectionEnd"
:adjustPosition="adjustPosition"
:disableDefaultPadding="disableDefaultPadding"
:holdKeyboard="holdKeyboard"
:maxlength="maxlength"
:confirm-type="confirmType"
:ignoreCompositionEvent="ignoreCompositionEvent"
@focus="onFocus"
@blur="onBlur"
@linechange="onLinechange"
@input="onInput"
@confirm="onConfirm"
@keyboardheightchange="onKeyboardheightchange"
></textarea>
<!-- #ifndef MP-ALIPAY -->
<text
class="u-textarea__count"
:style="{
'background-color': disabled ? 'transparent' : '#fff',
}"
v-if="count"
>{{ innerValue.length }}/{{ maxlength }}</text
>
<!-- #endif -->
</view>
</template>
<script>
import props from "./props.js";
import mpMixin from '../../libs/mixin/mpMixin';
import mixin from '../../libs/mixin/mixin';
import { addStyle, addUnit, deepMerge, formValidate, os } from '../../libs/function/index';
/**
* Textarea 文本域
* @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
* @tutorial https://ijry.github.io/uview-plus/components/textarea.html
*
* @property {String | Number} value 输入框的内容
* @property {String | Number} placeholder 输入框为空时占位符
* @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'
* @property {String | Object} placeholderStyle 指定placeholder的样式字符串/对象形式,如"color: red;"
* @property {String | Number} height 输入框高度(默认 70
* @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'
* @property {Boolean} disabled 是否禁用(默认 false
* @property {Boolean} count 是否显示统计字数(默认 false
* @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
* @property {Boolean | Function} autoHeight 是否自动增加高度(默认 false
* @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
* @property {Number} cursorSpacing 指定光标与键盘的距离(默认 0
* @property {String | Number} cursor 指定focus时的光标位置
* @property {Function} formatter 内容式化函数
* @property {Boolean} showConfirmBar 是否显示键盘上方带有”完成“按钮那一栏,(默认 true
* @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
* @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
* @property {Boolean} adjustPosition 键盘弹起时,是否自动上推页面(默认 true
* @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
* @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
* @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
* @property {String} border 边框类型surround-四周边框none-无边框bottom-底部边框(默认 'surround'
* @property {Boolean} ignoreCompositionEvent 是否忽略组件内对文本合成系统事件的处理
*
* @event {Function(e)} focus 输入框聚焦时触发event.detail = { value, height }height 为键盘高度
* @event {Function(e)} blur 输入框失去焦点时触发event.detail = {value, cursor}
* @event {Function(e)} linechange 输入框行数变化时调用event.detail = {height: 0, heightRpx: 0, lineCount: 0}
* @event {Function(e)} input 当键盘输入时,触发 input 事件
* @event {Function(e)} confirm 点击完成时, 触发 confirm 事件
* @event {Function(e)} keyboardheightchange 键盘高度发生变化的时候触发此事件
* @example <up-textarea v-model="value1" placeholder="请输入内容" ></up-textarea>
*/
export default {
name: "u-textarea",
mixins: [mpMixin, mixin, props],
data() {
return {
// 输入框的值
innerValue: "",
// 是否处于获得焦点状态
focused: false,
// value是否第一次变化在watch中由于加入immediate属性会在第一次触发此时不应该认为value发生了变化
firstChange: true,
// value绑定值的变化是由内部还是外部引起的
changeFromInner: false,
// 过滤处理方法
innerFormatter: value => value
}
},
created() {
},
watch: {
// #ifdef VUE2
value: {
immediate: true,
handler(newVal, oldVal) {
this.innerValue = newVal;
/* #ifdef H5 */
// 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
if (
this.firstChange === false &&
this.changeFromInner === false
) {
this.valueChange();
}
/* #endif */
this.firstChange = false;
// 重置changeFromInner的值为false标识下一次引起默认为外部引起的
this.changeFromInner = false;
},
},
// #endif
// #ifdef VUE3
modelValue: {
immediate: true,
handler(newVal, oldVal) {
this.innerValue = newVal;
/* #ifdef H5 */
// 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
if (
this.firstChange === false &&
this.changeFromInner === false
) {
this.valueChange();
}
/* #endif */
this.firstChange = false;
// 重置changeFromInner的值为false标识下一次引起默认为外部引起的
this.changeFromInner = false;
},
}
// #endif
},
computed: {
// 组件的类名
textareaClass() {
let classes = [],
{ border, disabled } = this;
border === "surround" &&
(classes = classes.concat(["u-border", "u-textarea--radius"]));
border === "bottom" &&
(classes = classes.concat([
"u-border-bottom",
"u-textarea--no-radius",
]));
disabled && classes.push("u-textarea--disabled");
return classes.join(" ");
},
// 组件的样式
textareaStyle() {
const style = {};
// #ifdef APP-NVUE
// 由于textarea在安卓nvue上的差异性需要额外再调整其内边距
if (os() === "android") {
style.paddingTop = "6px";
style.paddingLeft = "9px";
style.paddingBottom = "3px";
style.paddingRight = "6px";
}
// #endif
return deepMerge(style, addStyle(this.customStyle));
},
},
// #ifdef VUE3
emits: ['update:modelValue', 'linechange', 'focus', 'blur', 'change', 'confirm', 'keyboardheightchange'],
// #endif
methods: {
addStyle,
addUnit,
// 在微信小程序中不支持将函数当做props参数故只能通过ref形式调用
setFormatter(e) {
this.innerFormatter = e
},
onFocus(e) {
this.$emit("focus", e);
},
onBlur(e) {
this.$emit("blur", e);
// 尝试调用u-form的验证方法
formValidate(this, "blur");
},
onLinechange(e) {
this.$emit("linechange", e);
},
onInput(e) {
let { value = "" } = e.detail || {};
// 格式化过滤方法
const formatter = this.formatter || this.innerFormatter
const formatValue = formatter(value)
// 为了避免props的单向数据流特性需要先将innerValue值设置为当前值再在$nextTick中重新赋予设置后的值才有效
this.innerValue = value
this.$nextTick(() => {
this.innerValue = formatValue;
this.valueChange();
})
},
// 内容发生变化,进行处理
valueChange() {
const value = this.innerValue;
this.$nextTick(() => {
// #ifdef VUE3
this.$emit("update:modelValue", value);
// #endif
// #ifdef VUE2
this.$emit("input", value);
// #endif
// 标识value值的变化是由内部引起的
this.changeFromInner = true;
this.$emit("change", value);
// 尝试调用u-form的验证方法
formValidate(this, "change");
});
},
onConfirm(e) {
this.$emit("confirm", e);
},
onKeyboardheightchange(e) {
this.$emit("keyboardheightchange", e);
},
},
};
</script>
<style lang="scss" scoped>
@import "../../libs/css/components.scss";
.u-textarea {
border-radius: 4px;
background-color: #fff;
position: relative;
@include flex;
flex: 1;
padding: 9px;
&--radius {
border-radius: 4px;
}
&--no-radius {
border-radius: 0;
}
&--disabled {
background-color: #f5f7fa;
}
&__field {
flex: 1;
font-size: 15px;
color: $u-content-color;
width: 100%;
}
&__count {
position: absolute;
right: 5px;
bottom: 2px;
font-size: 12px;
color: $u-tips-color;
background-color: #ffffff;
padding: 1px 4px;
}
}
</style>