From 6e8b5b9a2021c81367b60326e03194ee99eb0a96 Mon Sep 17 00:00:00 2001
From: tjz <415800467@qq.com>
Date: Sat, 3 Mar 2018 19:14:03 +0800
Subject: [PATCH] add cascader

---
 components/_util/props-util.js       |   1 +
 components/_util/vnode.js            |  37 ++-
 components/cascader/demo/basic.md    |  53 ++++
 components/cascader/index.vue        | 374 +++++++++++++++++++++++++++
 components/cascader/style/index.js   |   5 +
 components/cascader/style/index.less | 214 +++++++++++++++
 components/index.js                  |   2 +
 components/style.js                  |   1 +
 examples/routes.js                   |   2 +-
 9 files changed, 683 insertions(+), 6 deletions(-)
 create mode 100644 components/cascader/demo/basic.md
 create mode 100644 components/cascader/index.vue
 create mode 100644 components/cascader/style/index.js
 create mode 100644 components/cascader/style/index.less

diff --git a/components/_util/props-util.js b/components/_util/props-util.js
index 81a145734..6ee8a3f30 100644
--- a/components/_util/props-util.js
+++ b/components/_util/props-util.js
@@ -149,5 +149,6 @@ export {
   getKey,
   getAttrs,
   getValueByProp,
+  parseStyleText,
 }
 export default hasProp
diff --git a/components/_util/vnode.js b/components/_util/vnode.js
index b61daa0fa..59eb2b221 100644
--- a/components/_util/vnode.js
+++ b/components/_util/vnode.js
@@ -1,4 +1,4 @@
-import { filterEmpty } from './props-util'
+import { filterEmpty, parseStyleText } from './props-util'
 export function cloneVNode (vnode, deep) {
   const componentOptions = vnode.componentOptions
   const data = vnode.data
@@ -62,18 +62,45 @@ export function cloneElement (n, nodeProps, deep) {
   const node = cloneVNode(ele, deep)
   const { props = {}, key, on = {}, children } = nodeProps
   const data = node.data || {}
-  const { style = {},
-    class: cls = {},
+  let cls = {}
+  let style = {}
+  const {
     attrs = {},
     ref,
     domProps = {},
+    style: tempStyle = {},
+    class: tempCls = {},
   } = nodeProps
+
+  if (typeof data.style === 'string') {
+    style = parseStyleText(data.style)
+  } else {
+    style = { ...data.style, ...style }
+  }
+  if (typeof tempStyle === 'string') {
+    style = { ...style, ...parseStyleText(style) }
+  } else {
+    style = { ...style, ...tempStyle }
+  }
+
+  if (typeof data.class === 'string') {
+    cls[data.class] = true
+    data.class.split(' ').forEach(c => { cls[c.trim()] = true })
+  } else {
+    cls = { ...data.class, ...cls }
+  }
+  if (typeof tempCls === 'string') {
+    tempCls.split(' ').forEach(c => { cls[c.trim()] = true })
+  } else {
+    cls = { ...cls, ...tempCls }
+  }
   node.data = Object.assign({}, data, {
-    style: { ...data.style, ...style },
+    style,
     attrs: { ...data.attrs, ...attrs },
-    class: { ...data.class, ...cls },
+    class: cls,
     domProps: { ...data.domProps, ...domProps },
   })
+
   if (node.componentOptions) {
     node.componentOptions.propsData = node.componentOptions.propsData || {}
     node.componentOptions.listeners = node.componentOptions.listeners || {}
diff --git a/components/cascader/demo/basic.md b/components/cascader/demo/basic.md
new file mode 100644
index 000000000..e9b8df2ad
--- /dev/null
+++ b/components/cascader/demo/basic.md
@@ -0,0 +1,53 @@
+
+<cn>
+#### 基本
+省市区级联。
+</cn>
+
+<us>
+#### Basic
+Cascade selection box for selecting province/city/district.
+</us>
+
+```html
+<template>
+  <a-cascader :options="options" @change="onChange" placeholder="Please select" />
+</template>
+<script>
+export default {
+  data() {
+    return {
+      options: [{
+        value: 'zhejiang',
+        label: 'Zhejiang',
+        children: [{
+          value: 'hangzhou',
+          label: 'Hangzhou',
+          children: [{
+            value: 'xihu',
+            label: 'West Lake',
+          }],
+        }],
+      }, {
+        value: 'jiangsu',
+        label: 'Jiangsu',
+        children: [{
+          value: 'nanjing',
+          label: 'Nanjing',
+          children: [{
+            value: 'zhonghuamen',
+            label: 'Zhong Hua Men',
+          }],
+        }],
+      }]
+    }
+  },
+  methods: {
+    onChange(value) {
+      console.log(value);
+    }
+  }
+}
+</script>
+```
+
diff --git a/components/cascader/index.vue b/components/cascader/index.vue
new file mode 100644
index 000000000..a1e90a80d
--- /dev/null
+++ b/components/cascader/index.vue
@@ -0,0 +1,374 @@
+<script>
+import PropTypes from '../_util/vue-types'
+import VcCascader from '../vc-cascader'
+import arrayTreeFilter from 'array-tree-filter'
+import classNames from 'classnames'
+import omit from 'omit.js'
+import KeyCode from '../_util/KeyCode'
+import Input from '../input'
+import Icon from '../icon'
+import { hasProp, filterEmpty, getOptionProps } from '../_util/props-util'
+import BaseMixin from '../_util/BaseMixin'
+
+const CascaderOptionType = PropTypes.shape({
+  value: PropTypes.string.isRequired,
+  label: PropTypes.any.isRequired,
+  disabled: PropTypes.bool,
+  children: PropTypes.array,
+  __IS_FILTERED_OPTION: PropTypes.bool,
+}).loose
+
+const CascaderExpandTrigger = PropTypes.oneOf(['click', 'hover'])
+
+const ShowSearchType = PropTypes.shape({
+  filter: PropTypes.func,
+  render: PropTypes.func,
+  sort: PropTypes.func,
+  matchInputWidth: PropTypes.bool,
+}).loose
+function noop () {}
+
+const CascaderProps = {
+  /** 可选项数据源 */
+  options: PropTypes.arrayOf(CascaderOptionType).def([]),
+  /** 默认的选中项 */
+  defaultValue: PropTypes.arrayOf(PropTypes.string),
+  /** 指定选中项 */
+  value: PropTypes.arrayOf(PropTypes.string),
+  /** 选择完成后的回调 */
+  // onChange?: (value: string[], selectedOptions?: CascaderOptionType[]) => void;
+  /** 选择后展示的渲染函数 */
+  displayRender: PropTypes.func,
+  transitionName: PropTypes.string.def('slide-up'),
+  popupStyle: PropTypes.object.def({}),
+  /** 自定义浮层类名 */
+  popupClassName: PropTypes.string,
+  /** 浮层预设位置：`bottomLeft` `bottomRight` `topLeft` `topRight` */
+  popupPlacement: PropTypes.oneOf(['bottomLeft', 'bottomRight', 'topLeft', 'topRight']).def('bottomLeft'),
+  /** 输入框占位文本*/
+  placeholder: PropTypes.string.def('Please select'),
+  /** 输入框大小，可选 `large` `default` `small` */
+  size: PropTypes.oneOf(['large', 'default', 'small']),
+  /** 禁用*/
+  disabled: PropTypes.bool.def(false),
+  /** 是否支持清除*/
+  allowClear: PropTypes.bool.def(true),
+  showSearch: PropTypes.oneOfType([PropTypes.bool, ShowSearchType]),
+  notFoundContent: PropTypes.any.def('Not Found'),
+  loadData: PropTypes.func,
+  /** 次级菜单的展开方式，可选 'click' 和 'hover' */
+  expandTrigger: CascaderExpandTrigger,
+  /** 当此项为 true 时，点选每级菜单选项值都会发生变化 */
+  changeOnSelect: PropTypes.bool,
+  /** 浮层可见变化时回调 */
+  // onPopupVisibleChange?: (popupVisible: boolean) => void;
+  prefixCls: PropTypes.string.def('ant-cascader'),
+  inputPrefixCls: PropTypes.string.def('ant-input'),
+  getPopupContainer: PropTypes.func,
+  popupVisible: PropTypes.bool,
+}
+
+function defaultFilterOption (inputValue, path) {
+  return path.some(option => option.label.indexOf(inputValue) > -1)
+}
+
+function defaultSortFilteredOption (a, b, inputValue) {
+  function callback (elem) {
+    return elem.label.indexOf(inputValue) > -1
+  }
+
+  return a.findIndex(callback) - b.findIndex(callback)
+}
+
+const defaultDisplayRender = (label) => label.join(' / ')
+
+export default {
+  mixins: [BaseMixin],
+  props: CascaderProps,
+  data () {
+    this.cachedOptions = []
+    const { value, defaultValue, popupVisible, showSearch, options, changeOnSelect, flattenTree } = this
+    return {
+      sValue: value || defaultValue || [],
+      inputValue: '',
+      inputFocused: false,
+      sPopupVisible: popupVisible,
+      flattenOptions: showSearch && flattenTree(options, changeOnSelect),
+    }
+  },
+  watch: {
+    value (val) {
+      this.setState({ sValue: val || [] })
+    },
+    popupVisible (val) {
+      this.setState({ sPopupVisible: val })
+    },
+    options (val) {
+      if (this.showSearch) {
+        this.setState({ flattenOptions: this.flattenTree(this.options, this.changeOnSelect) })
+      }
+    },
+  },
+  methods: {
+    highlightKeyword (str, keyword, prefixCls) {
+      return str.split(keyword)
+        .map((node, index) => index === 0 ? node : [
+          <span class={`${prefixCls}-menu-item-keyword`} key='seperator'>{keyword}</span>,
+          node,
+        ])
+    },
+
+    defaultRenderFilteredOption (inputValue, path, prefixCls) {
+      return path.map(({ label }, index) => {
+        const node = label.indexOf(inputValue) > -1
+          ? this.highlightKeyword(label, inputValue, prefixCls) : label
+        return index === 0 ? node : [' / ', node]
+      })
+    },
+    handleChange (value, selectedOptions) {
+      this.setState({ inputValue: '' })
+      if (selectedOptions[0].__IS_FILTERED_OPTION) {
+        const unwrappedValue = value[0]
+        const unwrappedSelectedOptions = selectedOptions[0].path
+        this.setValue(unwrappedValue, unwrappedSelectedOptions)
+        return
+      }
+      this.setValue(value, selectedOptions)
+    },
+
+    handlePopupVisibleChange (popupVisible) {
+      if (!hasProp(this, 'popupVisible')) {
+        this.setState({
+          sPopupVisible: popupVisible,
+          inputFocused: popupVisible,
+          inputValue: popupVisible ? this.inputValue : '',
+        })
+      }
+      this.$emit('popupVisibleChange', popupVisible)
+    },
+
+    handleInputBlur () {
+      this.setState({
+        inputFocused: false,
+      })
+    },
+
+    handleInputClick (e) {
+      const { inputFocused, sPopupVisible } = this
+      // Prevent `Trigger` behaviour.
+      if (inputFocused || sPopupVisible) {
+        e.stopPropagation()
+        e.nativeEvent.stopImmediatePropagation()
+      }
+    },
+
+    handleKeyDown (e) {
+      if (e.keyCode === KeyCode.BACKSPACE) {
+        e.stopPropagation()
+      }
+    },
+
+    handleInputChange (e) {
+      const inputValue = e.target.value
+      this.setState({ inputValue })
+    },
+
+    setValue (value, selectedOptions) {
+      if (!hasProp(this, 'value')) {
+        this.setState({ sValue: value })
+      }
+      this.$emit('change', value, selectedOptions)
+    },
+
+    getLabel () {
+      const { options, displayRender = defaultDisplayRender } = this
+      const value = this.sValue
+      const unwrappedValue = Array.isArray(value[0]) ? value[0] : value
+      const selectedOptions = arrayTreeFilter(options,
+        (o, level) => o.value === unwrappedValue[level],
+      )
+      const label = selectedOptions.map(o => o.label)
+      return displayRender(label, selectedOptions)
+    },
+
+    clearSelection (e) {
+      e.preventDefault()
+      e.stopPropagation()
+      if (!this.inputValue) {
+        this.setValue([])
+        this.handlePopupVisibleChange(false)
+      } else {
+        this.setState({ inputValue: '' })
+      }
+    },
+
+    flattenTree (options, changeOnSelect, ancestor = []) {
+      let flattenOptions = []
+      options.forEach((option) => {
+        const path = ancestor.concat(option)
+        if (changeOnSelect || !option.children || !option.children.length) {
+          flattenOptions.push(path)
+        }
+        if (option.children) {
+          flattenOptions = flattenOptions.concat(this.flattenTree(option.children, changeOnSelect, path))
+        }
+      })
+      return flattenOptions
+    },
+
+    generateFilteredOptions (prefixCls) {
+      const { showSearch, notFoundContent, flattenOptions, inputValue } = this
+      const {
+        filter = defaultFilterOption,
+        render = this.defaultRenderFilteredOption,
+        sort = defaultSortFilteredOption,
+      } = showSearch
+      const filtered = flattenOptions.filter((path) => filter(inputValue, path))
+        .sort((a, b) => sort(a, b, inputValue))
+
+      if (filtered.length > 0) {
+        return filtered.map((path) => {
+          return {
+            __IS_FILTERED_OPTION: true,
+            path,
+            label: render(inputValue, path, prefixCls),
+            value: path.map((o) => o.value),
+            disabled: path.some((o) => o.disabled),
+          }
+        })
+      }
+      return [{ label: notFoundContent, value: 'ANT_CASCADER_NOT_FOUND', disabled: true }]
+    },
+
+    focus () {
+      this.$refs.input.focus()
+    },
+
+    blur () {
+      this.$refs.input.blur()
+    },
+  },
+
+  render () {
+    const { $slots, sValue: value, sPopupVisible, inputValue } = this
+    const props = getOptionProps(this)
+    const {
+      prefixCls, inputPrefixCls, placeholder, size, disabled,
+      allowClear, showSearch = false, ...otherProps } = props
+
+    const sizeCls = classNames({
+      [`${inputPrefixCls}-lg`]: size === 'large',
+      [`${inputPrefixCls}-sm`]: size === 'small',
+    })
+    const clearIcon = (allowClear && !disabled && value.length > 0) || inputValue ? (
+      <Icon
+        type='cross-circle'
+        class={`${prefixCls}-picker-clear`}
+        onClick={this.clearSelection}
+      />
+    ) : null
+    const arrowCls = classNames({
+      [`${prefixCls}-picker-arrow`]: true,
+      [`${prefixCls}-picker-arrow-expand`]: sPopupVisible,
+    })
+    const pickerCls = classNames(
+      `${prefixCls}-picker`, {
+        [`${prefixCls}-picker-with-value`]: inputValue,
+        [`${prefixCls}-picker-disabled`]: disabled,
+        [`${prefixCls}-picker-${size}`]: !!size,
+      })
+
+    // Fix bug of https://github.com/facebook/react/pull/5004
+    // and https://fb.me/react-unknown-prop
+    const tempInputProps = omit(otherProps, [
+      'options',
+      'popupPlacement',
+      'transitionName',
+      'displayRender',
+      'changeOnSelect',
+      'expandTrigger',
+      'popupVisible',
+      'getPopupContainer',
+      'loadData',
+      'popupClassName',
+      'filterOption',
+      'renderFilteredOption',
+      'sortFilteredOption',
+      'notFoundContent',
+    ])
+
+    let options = this.options
+    if (inputValue) {
+      options = this.generateFilteredOptions(prefixCls)
+    }
+    // Dropdown menu should keep previous status until it is fully closed.
+    if (!sPopupVisible) {
+      options = this.cachedOptions
+    } else {
+      this.cachedOptions = options
+    }
+
+    const dropdownMenuColumnStyle = {}
+    const isNotFound = (options || []).length === 1 && options[0].value === 'ANT_CASCADER_NOT_FOUND'
+    if (isNotFound) {
+      dropdownMenuColumnStyle.height = 'auto' // Height of one row.
+    }
+    // The default value of `matchInputWidth` is `true`
+    const resultListMatchInputWidth = showSearch.matchInputWidth !== false
+    if (resultListMatchInputWidth && inputValue && this.input) {
+      dropdownMenuColumnStyle.width = this.input.input.offsetWidth
+    }
+    const inputProps = {
+      props: {
+        ...tempInputProps,
+        prefixCls: inputPrefixCls,
+        placeholder: value && value.length > 0 ? undefined : placeholder,
+        value: inputValue,
+        disabled: disabled,
+        readOnly: !showSearch,
+        autoComplete: 'off',
+      },
+      class: `${prefixCls}-input ${sizeCls}`,
+      ref: 'input',
+      on: {
+        click: showSearch ? this.handleInputClick : noop,
+        blur: showSearch ? this.handleInputBlur : noop,
+        keydown: this.handleKeyDown,
+        change: showSearch ? this.handleInputChange : noop,
+      },
+    }
+    const children = filterEmpty($slots.default)
+    const input = children.length ? children : (
+      <span
+        class={pickerCls}
+      >
+        <span class={`${prefixCls}-picker-label`}>
+          {this.getLabel()}
+        </span>
+        <Input {...inputProps}/>
+        {clearIcon}
+        <Icon type='down' class={arrowCls} />
+      </span>
+    )
+    const cascaderProps = {
+      props: {
+        ...props,
+        options: options,
+        value: value,
+        popupVisible: sPopupVisible,
+        dropdownMenuColumnStyle: dropdownMenuColumnStyle,
+      },
+      on: {
+        popupVisibleChange: this.handlePopupVisibleChange,
+        change: this.handleChange,
+      },
+    }
+    return (
+      <VcCascader {...cascaderProps}>
+        {input}
+      </VcCascader>
+    )
+  },
+}
+
+</script>
\ No newline at end of file
diff --git a/components/cascader/style/index.js b/components/cascader/style/index.js
new file mode 100644
index 000000000..992a50794
--- /dev/null
+++ b/components/cascader/style/index.js
@@ -0,0 +1,5 @@
+import '../../style/index.less'
+import './index.less'
+
+// style dependencies
+import '../../input/style'
diff --git a/components/cascader/style/index.less b/components/cascader/style/index.less
new file mode 100644
index 000000000..f3d3b6ca3
--- /dev/null
+++ b/components/cascader/style/index.less
@@ -0,0 +1,214 @@
+@import "../../style/themes/default";
+@import "../../style/mixins/index";
+@import "../../input/style/mixin";
+
+@cascader-prefix-cls: ~"@{ant-prefix}-cascader";
+
+.@{cascader-prefix-cls} {
+  .reset-component;
+
+  &-input.@{ant-prefix}-input {
+    // Add important to fix https://github.com/ant-design/ant-design/issues/5078
+    // because input.less will compile after cascader.less
+    background-color: transparent !important;
+    cursor: pointer;
+    width: 100%;
+    display: block;
+  }
+
+  &-picker {
+    .reset-component;
+    position: relative;
+    display: inline-block;
+    cursor: pointer;
+    background-color: @component-background;
+    border-radius: @border-radius-base;
+    outline: 0;
+
+    &-with-value &-label {
+      color: transparent;
+    }
+
+    &-disabled {
+      cursor: not-allowed;
+      background: @input-disabled-bg;
+      color: @disabled-color;
+      .@{cascader-prefix-cls}-input {
+        cursor: not-allowed;
+      }
+    }
+
+    &:focus .@{cascader-prefix-cls}-input {
+      .active;
+    }
+
+    &-label {
+      position: absolute;
+      left: 0;
+      height: 20px;
+      line-height: 20px;
+      top: 50%;
+      margin-top: -10px;
+      white-space: nowrap;
+      text-overflow: ellipsis;
+      overflow: hidden;
+      width: 100%;
+      padding: 0 @control-padding-horizontal;
+    }
+
+    &-clear {
+      opacity: 0;
+      position: absolute;
+      right: @control-padding-horizontal;
+      z-index: 2;
+      background: @component-background;
+      top: 50%;
+      font-size: @font-size-sm;
+      color: @disabled-color;
+      width: 12px;
+      height: 12px;
+      margin-top: -6px;
+      line-height: 12px;
+      cursor: pointer;
+      transition: color 0.3s ease, opacity 0.15s ease;
+      &:hover {
+        color: @text-color-secondary;
+      }
+    }
+
+    &:hover &-clear {
+      opacity: 1;
+    }
+
+    // arrow
+    &-arrow {
+      position: absolute;
+      z-index: 1;
+      top: 50%;
+      right: @control-padding-horizontal;
+      width: 12px;
+      height: 12px;
+      font-size: 12px;
+      margin-top: -6px;
+      line-height: 12px;
+      color: @disabled-color;
+      &:before {
+        transition: transform .2s;
+      }
+      &&-expand {
+        &:before {
+          transform: rotate(180deg);
+        }
+      }
+    }
+  }
+
+  &-picker-small &-picker-clear,
+  &-picker-small &-picker-arrow {
+    right: @control-padding-horizontal-sm;
+  }
+
+  &-menus {
+    font-size: @font-size-base;
+    background: @component-background;
+    position: absolute;
+    z-index: @zindex-dropdown;
+    border-radius: @border-radius-base;
+    box-shadow: @box-shadow-base;
+    white-space: nowrap;
+
+    ul,
+    ol {
+      list-style: none;
+      margin: 0;
+      padding: 0;
+    }
+
+    &-empty,
+    &-hidden {
+      display: none;
+    }
+    &.slide-up-enter.slide-up-enter-active&-placement-bottomLeft,
+    &.slide-up-appear.slide-up-appear-active&-placement-bottomLeft {
+      animation-name: antSlideUpIn;
+    }
+
+    &.slide-up-enter.slide-up-enter-active&-placement-topLeft,
+    &.slide-up-appear.slide-up-appear-active&-placement-topLeft {
+      animation-name: antSlideDownIn;
+    }
+
+    &.slide-up-leave.slide-up-leave-active&-placement-bottomLeft {
+      animation-name: antSlideUpOut;
+    }
+
+    &.slide-up-leave.slide-up-leave-active&-placement-topLeft {
+      animation-name: antSlideDownOut;
+    }
+  }
+  &-menu {
+    display: inline-block;
+    vertical-align: top;
+    min-width: 111px;
+    height: 180px;
+    list-style: none;
+    margin: 0;
+    padding: 0;
+    border-right: @border-width-base @border-style-base @border-color-split;
+    overflow: auto;
+    &:first-child {
+      border-radius: @border-radius-base 0 0 @border-radius-base;
+    }
+    &:last-child {
+      border-right-color: transparent;
+      margin-right: -1px;
+      border-radius: 0 @border-radius-base @border-radius-base 0;
+    }
+    &:only-child {
+      border-radius: @border-radius-base;
+    }
+  }
+  &-menu-item {
+    padding: 5px @control-padding-horizontal;
+    line-height: 22px;
+    cursor: pointer;
+    white-space: nowrap;
+    transition: all 0.3s;
+    &:hover {
+      background: @item-hover-bg;
+    }
+    &-disabled {
+      cursor: not-allowed;
+      color: @disabled-color;
+      &:hover {
+        background: transparent;
+      }
+    }
+    &-active:not(&-disabled) {
+      &,
+      &:hover {
+        background: @background-color-base;
+        font-weight: 600;
+      }
+    }
+    &-expand {
+      position: relative;
+      padding-right: 24px;
+      &:after {
+        .iconfont-font("\e61f");
+        .iconfont-size-under-12px(8px);
+        color: @text-color-secondary;
+        position: absolute;
+        right: @control-padding-horizontal;
+      }
+    }
+    &-loading:after {
+      .iconfont-font("\e64d");
+      animation: loadingCircle 1s infinite linear;
+    }
+
+    & &-keyword {
+      color: @highlight-color;
+    }
+  }
+}
diff --git a/components/index.js b/components/index.js
index e39622cde..e295c878f 100644
--- a/components/index.js
+++ b/components/index.js
@@ -91,3 +91,5 @@ export { default as AutoComplete } from './auto-complete'
 
 export { default as Affix } from './affix'
 
+export { default as Cascader } from './cascader'
+
diff --git a/components/style.js b/components/style.js
index c2076c700..17336063d 100644
--- a/components/style.js
+++ b/components/style.js
@@ -25,3 +25,4 @@ import './select/style'
 import './switch/style'
 import './auto-complete/style'
 import './affix/style'
+import './cascader/style'
diff --git a/examples/routes.js b/examples/routes.js
index 68d799d79..401b22cbd 100644
--- a/examples/routes.js
+++ b/examples/routes.js
@@ -3,7 +3,7 @@ const AsyncComp = () => {
   const hashs = window.location.hash.split('/')
   const d = hashs[hashs.length - 1]
   return {
-    component: import(`../components/vc-cascader/demo/${d}`),
+    component: import(`../components/cascader/demo/${d}`),
   }
 }
 export default [