feat(input): add count slot, closes #1314

CHANGELOG.en-US.md

@@ -10,6 +10,7 @@
 ### Feats
 
 - `n-menu` add `dropdown-props` prop, closes [#1345](https://github.com/TuSimple/naive-ui/issues/1345).
+- `n-input` add `count` slot, closes [#1314](https://github.com/TuSimple/naive-ui/issues/1314).
 
 ## 2.19.8 (2021-10-14)
 

CHANGELOG.zh-CN.md

@@ -10,6 +10,7 @@
 ### Feats
 
 - `n-menu` 新增 `dropdown-props` 属性，关闭 [#1345](https://github.com/TuSimple/naive-ui/issues/1345)
+- `n-input` 新增 `count` slot，关闭 [#1314](https://github.com/TuSimple/naive-ui/issues/1314)
 
 ## 2.19.8 (2021-10-14)
 

src/auto-complete/demos/enUS/index.demo-entry.md

@@ -24,7 +24,7 @@ show-options-by-value
 | clearable | `boolean` | `false` | Whether auto complete is clearable. |
 | default-value | `string` | `null` | Default value of auto complete. |
 | disabled | `boolean` | `false` | Whether the auto complete is disabled. |
-| get-show | `(value: string \| null) => boolean` | `undefined` | Based on value to determine whether to show menu when focusing. |
+| get-show | `(value: string) => boolean` | `undefined` | Based on value to determine whether to show menu when focusing. |
 | loading | `boolean` | `false` | Whether to show a loading status. |
 | options | `Array<string \| AutoCompleteOption \| AutoCompleteGroupOption>` | `[]` | Auto complete options. |
 | placeholder | `string` | `'Please Input'` | Auto complete's placeholder. |

src/auto-complete/demos/zhCN/index.demo-entry.md

@@ -24,7 +24,7 @@ show-options-by-value
 | clearable | `boolean` | `false` | 自动填充是否支持可清除 |
 | default-value | `string` | `null` | 自动填充的默认值 |
 | disabled | `boolean` | `false` | 自动填充是否禁用 |
-| get-show | `(value: string \| null) => boolean` | `undefined` | 根据输入值在聚焦的状态中决定是否显示菜单 |
+| get-show | `(value: string) => boolean` | `undefined` | 根据输入值在聚焦的状态中决定是否显示菜单 |
 | loading | `boolean` | `false` | 是否展示加载状态 |
 | options | `Array<string \| AutoCompleteOption \| AutoCompleteGroupOption>` | `[]` | 自动填充的自定义选项 |
 | placeholder | `string` | `'请输入'` | 自动填充的提示信息 |

src/auto-complete/src/AutoComplete.tsx

@@ -70,7 +70,7 @@ const autoCompleteProps = {
   value: String,
   blurAfterSelect: Boolean,
   clearAfterSelect: Boolean,
-  getShow: Function as PropType<(inputValue: string | null) => boolean>,
+  getShow: Function as PropType<(inputValue: string) => boolean>,
   size: String as PropType<'small' | 'medium' | 'large'>,
   options: {
     type: Array as PropType<AutoCompleteOptions>,
@@ -134,7 +134,7 @@ export default defineComponent({
     const mergedShowOptionsRef = computed(() => {
       const { getShow } = props
       if (getShow) {
-        return getShow(mergedValueRef.value)
+        return getShow(mergedValueRef.value || '')
       }
       return !!mergedValueRef.value
     })

src/input/demos/enUS/count.demo.md

@@ -6,5 +6,10 @@ Don't waste words.
 <n-space vertical>
   <n-input maxlength="30" show-count clearable />
   <n-input type="textarea" maxlength="30" show-count />
+  <n-input type="textarea" show-count #count="{ value }">
+    <n-input type="textarea" default-value="What" show-count #count="{ value }">
+      {{ value.includes('What') ? '99+' : value.length }}
+    </n-input>
+  </n-input>
 </n-space>
 ```

src/input/demos/enUS/index.demo-entry.md

@@ -59,9 +59,10 @@ event
 
 | Name | Parameters | Description |
 | --- | --- | --- |
+| count | `(value: string)` | Word count. |
 | prefix | `()` | Prefix content slot. |
-| suffix | `()` | Suffix content slot. |
 | separator | `()` | The separator content of the input, only works when `pair` is true. This will take priority over the separator property. |
+| suffix | `()` | Suffix content slot. |
 
 ### InputGroup Slots
 

src/input/demos/zhCN/count.demo.md

@@ -6,5 +6,8 @@
 <n-space vertical>
   <n-input maxlength="30" show-count clearable />
   <n-input type="textarea" maxlength="30" show-count />
+  <n-input type="textarea" default-value="啥" show-count #count="{ value }">
+    {{ value.includes('啥') ? '99+' : value.length }}
+  </n-input>
 </n-space>
 ```

src/input/demos/zhCN/index.demo-entry.md

@@ -56,21 +56,22 @@ focus
 
 ### Input Slots
 
-| 属性 | 类型 | 说明 |
+| 属性 | 参数 | 说明 |
 | --- | --- | --- |
+| count | `(value: string)` | 字数统计 |
 | prefix | `()` | 输入框头部内容 |
-| suffix | `()` | 输入框尾部内容 |
 | separator | `()` | 成对输入框之间分隔符，仅 `pair` = true 生效且优先级高于 separator 属性 |
+| suffix | `()` | 输入框尾部内容 |
 
 ### InputGroup Slots
 
-| 属性    | 类型 | 说明         |
+| 属性    | 参数 | 说明         |
 | ------- | ---- | ------------ |
 | default | `()` | 输入组的内容 |
 
 ### InputGroupLabel Slots
 
-| 属性    | 类型 | 说明             |
+| 属性    | 参数 | 说明             |
 | ------- | ---- | ---------------- |
 | default | `()` | 输入组标签的内容 |
 

src/input/src/Input.tsx

@@ -35,7 +35,7 @@ import {
   InputWrappedRef,
   inputInjectionKey
 } from './interface'
-import { len, isEmptyValue } from './utils'
+import { isEmptyValue } from './utils'
 import WordCount from './WordCount'
 import style from './styles/input.cssr'
 import { off, on } from 'evtd'
@@ -658,11 +658,7 @@ export default defineComponent({
     })
 
     provide(inputInjectionKey, {
-      wordCountRef: computed(() => {
-        const { value: mergedValue } = mergedValueRef
-        if (mergedValue === null || Array.isArray(mergedValue)) return 0
-        return len(mergedValue)
-      }),
+      mergedValueRef,
       maxlengthRef,
       mergedClsPrefixRef
     })
@@ -1082,7 +1078,9 @@ export default defineComponent({
         {this.mergedBordered ? (
           <div class={`${mergedClsPrefix}-input__state-border`} />
         ) : null}
-        {this.showCount && this.type === 'textarea' ? <WordCount /> : null}
+        {this.showCount && this.type === 'textarea' ? (
+          <WordCount>{{ default: this.$slots.count }}</WordCount>
+        ) : null}
       </div>
     )
   }

src/input/src/WordCount.tsx

@@ -1,19 +1,33 @@
-/* eslint-disable @typescript-eslint/no-non-null-assertion */
-import { defineComponent, inject, h } from 'vue'
+import { defineComponent, inject, h, computed } from 'vue'
 import { inputInjectionKey } from './interface'
+import { len } from './utils'
 
 export default defineComponent({
   name: 'InputWordCount',
-  setup () {
-    const { wordCountRef, maxlengthRef, mergedClsPrefixRef } =
+  setup (_, { slots }) {
+    const { mergedValueRef, maxlengthRef, mergedClsPrefixRef } =
+      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
       inject(inputInjectionKey)!
+    const wordCountRef = computed(() => {
+      const { value: mergedValue } = mergedValueRef
+      if (mergedValue === null || Array.isArray(mergedValue)) return 0
+      return len(mergedValue)
+    })
     return () => {
       const { value: maxlength } = maxlengthRef
+      const { value: mergedValue } = mergedValueRef
       return (
         <span class={`${mergedClsPrefixRef.value}-input-word-count`}>
-          {maxlength === undefined
-            ? wordCountRef.value
-            : `${wordCountRef.value} / ${maxlength}`}
+          {slots.default
+            ? slots.default({
+              value:
+                  mergedValue === null || Array.isArray(mergedValue)
+                    ? ''
+                    : mergedValue
+            })
+            : maxlength === undefined
+              ? wordCountRef.value
+              : `${wordCountRef.value} / ${maxlength}`}
         </span>
       )
     }

src/input/src/interface.ts

@@ -22,7 +22,7 @@ export interface InputWrappedRef {
 export type InputInst = UnwrapRef<InputWrappedRef>
 
 export const inputInjectionKey: InjectionKey<{
-  wordCountRef: Ref<number>
+  mergedValueRef: Ref<string | [string, string] | null>
   maxlengthRef: Ref<number | undefined>
   mergedClsPrefixRef: Ref<string>
 }> = Symbol('input')