creat

Signed-off-by: TIANHE <TIANHE@GMAIL.COM>

quantdinger_vue/src/components/TextArea/index.jsx

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+import './style.less'
+import { getStrFullLength, cutStrByFullLength } from '../_util/util'
+import Input from 'ant-design-vue/es/input'
+const TextArea = Input.TextArea
+
+export default {
+  name: 'LimitTextArea',
+  model: {
+    prop: 'value',
+    event: 'change'
+  },
+  props: Object.assign({}, TextArea.props, {
+    prefixCls: {
+      type: String,
+      default: 'ant-textarea-limit'
+    },
+    // eslint-disable-next-line
+    value: {
+      type: String
+    },
+    limit: {
+      type: Number,
+      default: 200
+    }
+  }),
+  data () {
+    return {
+      currentLimit: 0
+    }
+  },
+  watch: {
+    value (val) {
+      this.calcLimitNum(val)
+    }
+  },
+  created () {
+    this.calcLimitNum(this.value)
+  },
+  methods: {
+    handleChange (e) {
+      const value = e.target.value
+      const len = getStrFullLength(value)
+      if (len <= this.limit) {
+        this.currentLimit = len
+        this.$emit('change', value)
+      } else {
+        const str = cutStrByFullLength(value, this.limit)
+        this.currentLimit = getStrFullLength(str)
+        this.$emit('change', str)
+      }
+    },
+    calcLimitNum (val) {
+      const len = getStrFullLength(val)
+      this.currentLimit = len
+    }
+  },
+  render () {
+    const { prefixCls, ...props } = this.$props
+    return (
+      <div class={this.prefixCls}>
+        <TextArea {...{ props }} value={this.value} onChange={this.handleChange}>
+        </TextArea>
+        <span class="limit">{this.currentLimit}/{this.limit}</span>
+      </div>
+    )
+  }
+}