antd-virtual-select
Version:
Long list optimization antd select component
499 lines (387 loc) • 21.1 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = void 0;
var _react = _interopRequireWildcard(require("react"));
var _antd = require("antd");
var _DropDownWrap = _interopRequireDefault(require("./DropDownWrap"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }
function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
// 页面实际渲染的下拉菜单数量，实际为 2 * ITEM_ELEMENT_NUMBER
var ITEM_ELEMENT_NUMBER = 30; // Select size 配置
var ITEM_HEIGHT_CFG = {
small: 24,
large: 40,
"default": 32
};
var ARROW_CODE = {
40: "down",
38: "up"
};
var DROPDOWN_HEIGHT = 224;
var Option = _antd.Select.Option;
var SuperSelect =
/*#__PURE__*/
function (_PureComponent) {
_inherits(SuperSelect, _PureComponent);
function SuperSelect(props) {
var _this;
_classCallCheck(this, SuperSelect);
_this = _possibleConstructorReturn(this, _getPrototypeOf(SuperSelect).call(this, props));
_defineProperty(_assertThisInitialized(_this), "getItemStyle", function (i) {
return {
position: "absolute",
top: _this.ITEM_HEIGHT * i,
width: "100%",
height: _this.ITEM_HEIGHT
};
});
_defineProperty(_assertThisInitialized(_this), "addEvent", function () {
_this.scrollEle = document.querySelector(".".concat(_this.dropdownClassName)); // 下拉菜单未展开时元素不存在
if (!_this.scrollEle) return;
_this.scrollEle.addEventListener("scroll", _this.onScroll, false);
_this.inputEle = document.querySelector("#".concat(_this.id));
if (!_this.inputEle) return;
_this.inputEle.addEventListener("keydown", _this.onKeyDown, false);
});
_defineProperty(_assertThisInitialized(_this), "onKeyDown", function (e) {
var _ref = e || {},
keyCode = _ref.keyCode;
setTimeout(function () {
var activeItem = document.querySelector(".".concat(_this.dropdownClassName, " .ant-select-dropdown-menu-item-active"));
if (!activeItem) return;
var offsetTop = activeItem.offsetTop;
var isUp = ARROW_CODE[keyCode] === "up";
var isDown = ARROW_CODE[keyCode] === "down"; // 在所有列表第一行按上键
if (offsetTop - _this.prevTop > DROPDOWN_HEIGHT && isUp) {
_this.scrollEle.scrollTo(0, _this.allHeight - DROPDOWN_HEIGHT);
_this.prevTop = _this.allHeight;
return;
} // 在所有列表中最后一行按下键
if (_this.prevTop > offsetTop + DROPDOWN_HEIGHT && isDown) {
_this.scrollEle.scrollTo(0, 0);
_this.prevTop = 0;
return;
}
_this.prevTop = offsetTop; // 向下滚动到下拉框最后一行时，向下滚动一行的高度
if (offsetTop > _this.scrollEle.scrollTop + DROPDOWN_HEIGHT - _this.ITEM_HEIGHT + 10 && isDown) {
_this.scrollEle.scrollTo(0, _this.scrollTop + _this.ITEM_HEIGHT);
return;
} // 向上滚动到下拉框第一一行时，向上滚动一行的高度
if (offsetTop < _this.scrollEle.scrollTop && isUp) {
_this.scrollEle.scrollTo(0, _this.scrollTop - _this.ITEM_HEIGHT);
}
}, 100);
});
_defineProperty(_assertThisInitialized(_this), "onScroll", function () {
return _this.throttleByHeight(_this.onScrollReal);
});
_defineProperty(_assertThisInitialized(_this), "onScrollReal", function () {
_this.allList = _this.getUseChildrenList();
var _this$getStartAndEndI = _this.getStartAndEndIndex(),
startIndex = _this$getStartAndEndI.startIndex,
endIndex = _this$getStartAndEndI.endIndex;
_this.prevScrollTop = _this.scrollTop; // 重新渲染列表组件 Wrap
var allHeight = _this.allList.length * _this.ITEM_HEIGHT || 100;
_this.wrap.reactList(allHeight, startIndex, endIndex);
});
_defineProperty(_assertThisInitialized(_this), "throttleByHeight", function () {
_this.scrollTop = _this.scrollEle.scrollTop; // 滚动的高度
var delta = _this.prevScrollTop - _this.scrollTop;
delta = delta < 0 ? 0 - delta : delta;
delta > _this.reactDelta && _this.onScrollReal();
});
_defineProperty(_assertThisInitialized(_this), "getUseChildrenList", function () {
return _this.state.filterChildren || _this.state.children;
});
_defineProperty(_assertThisInitialized(_this), "getStartAndEndIndex", function () {
// 滚动后显示在列表可视区中的第一个 item 的 index
var showIndex = Number((_this.scrollTop / _this.ITEM_HEIGHT).toFixed(0));
var startIndex = showIndex - ITEM_ELEMENT_NUMBER < 0 ? 0 : showIndex - ITEM_ELEMENT_NUMBER / 2;
var endIndex = showIndex + ITEM_ELEMENT_NUMBER;
return {
startIndex: startIndex,
endIndex: endIndex
};
});
_defineProperty(_assertThisInitialized(_this), "setSuperDrowDownMenu", function (visible) {
if (!visible) return;
_this.allList = _this.getUseChildrenList();
if (!_this.eventTimer) {
_this.eventTimer = setTimeout(function () {
return _this.addEvent();
}, 0);
} else {
var allHeight = _this.allList.length * _this.ITEM_HEIGHT || 100; // 下拉列表单独重新渲染
var _this$getStartAndEndI2 = _this.getStartAndEndIndex(),
startIndex = _this$getStartAndEndI2.startIndex,
endIndex = _this$getStartAndEndI2.endIndex;
setTimeout(function () {
_this.wrap && _this.wrap.reactList(allHeight, startIndex, endIndex);
}, 0);
}
});
_defineProperty(_assertThisInitialized(_this), "onDropdownVisibleChange", function (visible) {
var onDropdownVisibleChange = _this.props.onDropdownVisibleChange;
onDropdownVisibleChange && onDropdownVisibleChange(visible); // 关闭下拉框前清空筛选条件，防止下次打开任然显示筛选后的 options
if (!visible) {
// 定时器确保关闭后再设置 filterChildren,防止列表刷新闪烁
setTimeout(function () {
_this.setState({
filterChildren: null
});
});
} else {
// 如果已有 value, 设置默认滚动位置
_this.setDefaultScrollTop(); // 设置下拉列表显示数据
_this.setSuperDrowDownMenu(visible);
}
});
_defineProperty(_assertThisInitialized(_this), "onDeselect", function (value) {
var onDeselect = _this.props.onDeselect;
onDeselect && onDeselect(value);
});
_defineProperty(_assertThisInitialized(_this), "onChange", function (value, opt) {
var _this$props = _this.props,
showSearch = _this$props.showSearch,
onChange = _this$props.onChange,
autoClearSearchValue = _this$props.autoClearSearchValue;
if (showSearch || _this.isMultiple) {
// 搜索模式下选择后是否需要重置搜索状态
if (autoClearSearchValue !== false) {
_this.setState({
filterChildren: null
}, function () {
// 搜索成功后重新设置列表的总高度
_this.setSuperDrowDownMenu(true);
});
}
}
_this.setState({
value: value
});
onChange && onChange(value, opt);
});
_defineProperty(_assertThisInitialized(_this), "onSearch", function (v) {
var _this$props2 = _this.props,
showSearch = _this$props2.showSearch,
onSearch = _this$props2.onSearch,
filterOption = _this$props2.filterOption,
children = _this$props2.children;
if (showSearch && filterOption !== false) {
// 须根据 filterOption（如有该自定义函数）手动 filter 搜索匹配的列表
var filterChildren = null;
if (typeof filterOption === "function") {
filterChildren = children.filter(function (item) {
return filterOption(v, item);
});
} else if (filterOption === undefined) {
filterChildren = children.filter(function (item) {
return _this.filterOption(v, item);
});
} // 设置下拉列表显示数据
_this.setState({
filterChildren: v === "" ? null : filterChildren
}, function () {
setTimeout(function () {
// 搜索后需要重置滚动位置到0，防止上次 scrollTop 位置无数据
if (filterChildren) {
_this.scrollTop = 0;
} // 搜索成功后需要重新设置列表的总高度
_this.setSuperDrowDownMenu(true);
}, 0);
});
}
onSearch && onSearch(v);
});
_defineProperty(_assertThisInitialized(_this), "filterOption", function (v, option) {
// 自定义过滤对应的 option 属性配置
var filterProps = _this.props.optionFilterProp || "value";
return "".concat(option.props[filterProps]).indexOf(v) >= 0;
});
_defineProperty(_assertThisInitialized(_this), "setDefaultScrollTop", function () {
var value = _this.state.value;
var children = _this.props.children;
for (var i = 0; i < children.length; i++) {
var item = children[i];
var itemValue = item.props.value;
if (itemValue === value || Array.isArray(value) && value.includes(itemValue)) {
var _ret = function () {
var targetScrollTop = i * _this.ITEM_HEIGHT;
setTimeout(function () {
_this.scrollEle.scrollTo(0, targetScrollTop);
}, 100);
return {
v: void 0
};
}();
if (_typeof(_ret) === "object") return _ret.v;
}
}
});
_defineProperty(_assertThisInitialized(_this), "removeEvent", function () {
if (!_this.scrollEle) return;
_this.scrollEle.removeEventListener("scroll", _this.onScroll, false);
if (!_this.inputEle) return;
_this.inputEle.removeEventListener("keydown", _this.onKeyDown, false);
});
var mode = props.mode,
defaultValue = props.defaultValue,
_value = props.value,
optionHeight = props.optionHeight;
_this.isMultiple = ["tags", "multiple"].includes(mode); // 设置默认 value
var defaultV = _this.isMultiple ? [] : "";
defaultV = _value || defaultValue || defaultV;
_this.state = {
children: props.children || [],
filterChildren: null,
// 筛选后的 options，优先显示，所以清除筛选后手动设为 null
value: defaultV
}; // 下拉菜单项行高
_this.ITEM_HEIGHT = optionHeight || ITEM_HEIGHT_CFG[props.size || "default"]; // 可视区 dom 高度
_this.visibleDomHeight = _this.ITEM_HEIGHT * ITEM_ELEMENT_NUMBER; // 滚动时重新渲染的 scrollTop 判断值，大于 reactDelta 则刷新下拉列表
_this.reactDelta = _this.visibleDomHeight / 3; // 是否拖动滚动条快速滚动状态
_this.isStopReact = false; // 上一次滚动的 scrollTop 值
_this.prevScrollTop = 0; // 上一次按下方向键时 scrollTop 值
_this.prevTop = 0;
_this.scrollTop = 0; // className
_this.dropdownClassName = "dc".concat(+new Date());
_this.id = "sid".concat(+new Date());
return _this;
}
_createClass(SuperSelect, [{
key: "componentDidMount",
value: function componentDidMount() {
var _this2 = this;
// defaultOpens=true 时添加滚动事件
setTimeout(function () {
_this2.addEvent();
}, 500);
}
}, {
key: "componentDidUpdate",
value: function componentDidUpdate(prevProps) {
var _this$props3 = this.props,
mode = _this$props3.mode,
defaultValue = _this$props3.defaultValue,
value = _this$props3.value,
children = _this$props3.children;
if (prevProps.children !== children) {
this.isMultiple = ["tags", "multiple"].includes(mode);
this.setState({
children: children || [],
filterChildren: null
});
}
if (prevProps.value !== value) {
// 更新时设置默认 value
var defaultV = this.isMultiple ? [] : "";
defaultV = value || defaultValue || defaultV;
this.setState({
value: defaultV
});
}
}
}, {
key: "componentWillUnmount",
value: function componentWillUnmount() {
this.removeEvent();
} // value 存在时需要滚动到 value 所在位置
// scrollToValue = () => {
// if (!this.scrollEle) return;
// const { children } = this.props;
// const { value } = this.state;
// const index = children.findIndex(item => item.key === value) || 0;
// const y = this.ITEM_HEIGHT * index;
// this.scrollEle.scrollTop = y;
// setTimeout(() => {
// this.forceUpdate();
// }, 0);
// };
}, {
key: "render",
value: function render() {
var _this3 = this;
var _this$props4 = this.props,
dropdownStyle = _this$props4.dropdownStyle,
optionLabelProp = _this$props4.optionLabelProp,
notFoundContent = _this$props4.notFoundContent,
dropdownClassName = _this$props4.dropdownClassName,
props = _objectWithoutProperties(_this$props4, ["dropdownStyle", "optionLabelProp", "notFoundContent", "dropdownClassName"]);
this.allList = this.getUseChildrenList();
this.allHeight = this.allList.length * this.ITEM_HEIGHT || 100;
var _this$getStartAndEndI3 = this.getStartAndEndIndex(),
startIndex = _this$getStartAndEndI3.startIndex,
endIndex = _this$getStartAndEndI3.endIndex;
dropdownStyle = _objectSpread({
maxHeight: "".concat(DROPDOWN_HEIGHT, "px")
}, dropdownStyle, {
overflow: "auto",
position: "relative"
});
var value = this.state.value; // 判断处于 antd Form 中时不自动设置 value
var _props = _objectSpread({}, props); // 先删除 value，再手动赋值，防止空 value 影响 placeholder
delete _props.value; // value 为空字符会隐藏 placeholder，改为 undefined
if (typeof value === "string" && !value) {
_props.value = undefined;
} else {
_props.value = value;
}
optionLabelProp = optionLabelProp || "children";
return _react["default"].createElement(_antd.Select, _extends({}, _props, {
id: this.id,
onSearch: this.onSearch,
onChange: this.onChange,
dropdownClassName: "".concat(this.dropdownClassName, " ").concat(dropdownClassName || ""),
optionLabelProp: optionLabelProp,
dropdownStyle: dropdownStyle,
onDropdownVisibleChange: this.onDropdownVisibleChange,
onDeselect: this.onDeselect,
ref: function ref(ele) {
return _this3.select = ele;
},
dropdownRender: function dropdownRender(menu) {
if (_this3.allList.length === 0) {
return _react["default"].createElement("div", {
style: {
padding: "5px 12px"
}
}, notFoundContent);
}
return _react["default"].createElement(_DropDownWrap["default"], _extends({
startIndex: startIndex,
endIndex: endIndex,
allHeight: _this3.allHeight,
menu: menu,
itemHeight: _this3.ITEM_HEIGHT
}, {
ref: function ref(ele) {
_this3.wrap = ele;
}
}));
}
}), this.allList);
}
}]);
return SuperSelect;
}(_react.PureComponent);
SuperSelect.Option = Option;
var _default = SuperSelect;
exports["default"] = _default;