336 lines
10 KiB
Java
336 lines
10 KiB
Java
import _toConsumableArray from 'babel-runtime/helpers/toConsumableArray';
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import _extends from 'babel-runtime/helpers/extends';
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import _objectWithoutProperties from 'babel-runtime/helpers/objectWithoutProperties';
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import PropTypes from '../_util/vue-types';
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import ResizeObserver from 'resize-observer-polyfill';
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import SubMenu from './SubMenu';
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import BaseMixin from '../_util/BaseMixin';
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import { getWidth, setStyle, menuAllProps } from './util';
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import { cloneElement } from '../_util/vnode';
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import { getClass, getPropsData, getEvents, getListeners } from '../_util/props-util';
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var canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);
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var MENUITEM_OVERFLOWED_CLASSNAME = 'menuitem-overflowed';
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var FLOAT_PRECISION_ADJUST = 0.5;
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// Fix ssr
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if (canUseDOM) {
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require('mutationobserver-shim');
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}
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var DOMWrap = {
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name: 'DOMWrap',
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mixins: [BaseMixin],
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data: function data() {
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this.resizeObserver = null;
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this.mutationObserver = null;
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// original scroll size of the list
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this.originalTotalWidth = 0;
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// copy of overflowed items
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this.overflowedItems = [];
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// cache item of the original items (so we can track the size and order)
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this.menuItemSizes = [];
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return {
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lastVisibleIndex: undefined
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};
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},
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mounted: function mounted() {
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var _this = this;
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this.$nextTick(function () {
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_this.setChildrenWidthAndResize();
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if (_this.level === 1 && _this.mode === 'horizontal') {
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var menuUl = _this.$el;
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if (!menuUl) {
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return;
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}
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_this.resizeObserver = new ResizeObserver(function (entries) {
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entries.forEach(_this.setChildrenWidthAndResize);
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});
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[].slice.call(menuUl.children).concat(menuUl).forEach(function (el) {
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_this.resizeObserver.observe(el);
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});
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if (typeof MutationObserver !== 'undefined') {
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_this.mutationObserver = new MutationObserver(function () {
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_this.resizeObserver.disconnect();
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[].slice.call(menuUl.children).concat(menuUl).forEach(function (el) {
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_this.resizeObserver.observe(el);
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});
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_this.setChildrenWidthAndResize();
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});
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_this.mutationObserver.observe(menuUl, {
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attributes: false,
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childList: true,
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subTree: false
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});
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}
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}
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});
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},
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beforeDestroy: function beforeDestroy() {
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if (this.resizeObserver) {
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this.resizeObserver.disconnect();
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}
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if (this.mutationObserver) {
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this.mutationObserver.disconnect();
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}
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},
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methods: {
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// get all valid menuItem nodes
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getMenuItemNodes: function getMenuItemNodes() {
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var prefixCls = this.$props.prefixCls;
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var ul = this.$el;
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if (!ul) {
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return [];
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}
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// filter out all overflowed indicator placeholder
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return [].slice.call(ul.children).filter(function (node) {
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return node.className.split(' ').indexOf(prefixCls + '-overflowed-submenu') < 0;
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});
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},
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getOverflowedSubMenuItem: function getOverflowedSubMenuItem(keyPrefix, overflowedItems, renderPlaceholder) {
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var h = this.$createElement;
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var _$props = this.$props,
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overflowedIndicator = _$props.overflowedIndicator,
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level = _$props.level,
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mode = _$props.mode,
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prefixCls = _$props.prefixCls,
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theme = _$props.theme;
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if (level !== 1 || mode !== 'horizontal') {
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return null;
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}
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// put all the overflowed item inside a submenu
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// with a title of overflow indicator ('...')
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var copy = this.$slots['default'][0];
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var _getPropsData = getPropsData(copy),
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title = _getPropsData.title,
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rest = _objectWithoutProperties(_getPropsData, ['title']); // eslint-disable-line no-unused-vars
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var events = getEvents(copy);
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var style = {};
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var key = keyPrefix + '-overflowed-indicator';
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var eventKey = keyPrefix + '-overflowed-indicator';
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if (overflowedItems.length === 0 && renderPlaceholder !== true) {
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style = {
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display: 'none'
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};
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} else if (renderPlaceholder) {
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style = {
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visibility: 'hidden',
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// prevent from taking normal dom space
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position: 'absolute'
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};
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key = key + '-placeholder';
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eventKey = eventKey + '-placeholder';
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}
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var popupClassName = theme ? prefixCls + '-' + theme : '';
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var props = {};
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var on = {};
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menuAllProps.props.forEach(function (k) {
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if (rest[k] !== undefined) {
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props[k] = rest[k];
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}
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});
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menuAllProps.on.forEach(function (k) {
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if (events[k] !== undefined) {
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on[k] = events[k];
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}
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});
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var subMenuProps = {
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props: _extends({
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title: overflowedIndicator,
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popupClassName: popupClassName
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}, props, {
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eventKey: eventKey,
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disabled: false
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}),
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'class': prefixCls + '-overflowed-submenu',
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key: key,
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style: style,
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on: on
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};
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return h(
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SubMenu,
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subMenuProps,
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[overflowedItems]
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);
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},
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// memorize rendered menuSize
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setChildrenWidthAndResize: function setChildrenWidthAndResize() {
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if (this.mode !== 'horizontal') {
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return;
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}
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var ul = this.$el;
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if (!ul) {
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return;
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}
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var ulChildrenNodes = ul.children;
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if (!ulChildrenNodes || ulChildrenNodes.length === 0) {
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return;
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}
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var lastOverflowedIndicatorPlaceholder = ul.children[ulChildrenNodes.length - 1];
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// need last overflowed indicator for calculating length;
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setStyle(lastOverflowedIndicatorPlaceholder, 'display', 'inline-block');
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var menuItemNodes = this.getMenuItemNodes();
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// reset display attribute for all hidden elements caused by overflow to calculate updated width
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// and then reset to original state after width calculation
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var overflowedItems = menuItemNodes.filter(function (c) {
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return c.className.split(' ').indexOf(MENUITEM_OVERFLOWED_CLASSNAME) >= 0;
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});
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overflowedItems.forEach(function (c) {
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setStyle(c, 'display', 'inline-block');
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});
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this.menuItemSizes = menuItemNodes.map(function (c) {
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return getWidth(c);
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});
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overflowedItems.forEach(function (c) {
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setStyle(c, 'display', 'none');
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});
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this.overflowedIndicatorWidth = getWidth(ul.children[ul.children.length - 1]);
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this.originalTotalWidth = this.menuItemSizes.reduce(function (acc, cur) {
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return acc + cur;
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}, 0);
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this.handleResize();
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// prevent the overflowed indicator from taking space;
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setStyle(lastOverflowedIndicatorPlaceholder, 'display', 'none');
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},
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handleResize: function handleResize() {
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var _this2 = this;
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if (this.mode !== 'horizontal') {
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return;
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}
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var ul = this.$el;
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if (!ul) {
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return;
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}
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var width = getWidth(ul);
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this.overflowedItems = [];
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var currentSumWidth = 0;
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// index for last visible child in horizontal mode
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var lastVisibleIndex = void 0;
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// float number comparison could be problematic
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// e.g. 0.1 + 0.2 > 0.3 =====> true
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// thus using FLOAT_PRECISION_ADJUST as buffer to help the situation
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if (this.originalTotalWidth > width + FLOAT_PRECISION_ADJUST) {
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lastVisibleIndex = -1;
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this.menuItemSizes.forEach(function (liWidth) {
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currentSumWidth += liWidth;
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if (currentSumWidth + _this2.overflowedIndicatorWidth <= width) {
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lastVisibleIndex += 1;
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}
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});
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}
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this.setState({ lastVisibleIndex: lastVisibleIndex });
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},
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renderChildren: function renderChildren(children) {
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var _this3 = this;
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// need to take care of overflowed items in horizontal mode
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var lastVisibleIndex = this.$data.lastVisibleIndex;
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var className = getClass(this);
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return (children || []).reduce(function (acc, childNode, index) {
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var item = childNode;
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var eventKey = getPropsData(childNode).eventKey;
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if (_this3.mode === 'horizontal') {
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var overflowed = _this3.getOverflowedSubMenuItem(eventKey, []);
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if (lastVisibleIndex !== undefined && className[_this3.prefixCls + '-root'] !== -1) {
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if (index > lastVisibleIndex) {
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item = cloneElement(childNode,
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// 这里修改 eventKey 是为了防止隐藏状态下还会触发 openkeys 事件
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{
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style: { display: 'none' },
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props: { eventKey: eventKey + '-hidden' },
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'class': MENUITEM_OVERFLOWED_CLASSNAME
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});
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}
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if (index === lastVisibleIndex + 1) {
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_this3.overflowedItems = children.slice(lastVisibleIndex + 1).map(function (c) {
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return cloneElement(c,
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// children[index].key will become '.$key' in clone by default,
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// we have to overwrite with the correct key explicitly
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{
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key: getPropsData(c).eventKey,
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props: { mode: 'vertical-left' }
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});
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});
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overflowed = _this3.getOverflowedSubMenuItem(eventKey, _this3.overflowedItems);
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}
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}
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var ret = [].concat(_toConsumableArray(acc), [overflowed, item]);
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if (index === children.length - 1) {
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// need a placeholder for calculating overflowed indicator width
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ret.push(_this3.getOverflowedSubMenuItem(eventKey, [], true));
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}
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return ret;
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}
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return [].concat(_toConsumableArray(acc), [item]);
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}, []);
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}
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},
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render: function render() {
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var h = arguments[0];
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var Tag = this.$props.tag;
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var tagProps = {
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on: getListeners(this)
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};
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return h(
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Tag,
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tagProps,
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[this.renderChildren(this.$slots['default'])]
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);
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}
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};
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DOMWrap.props = {
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mode: PropTypes.oneOf(['horizontal', 'vertical', 'vertical-left', 'vertical-right', 'inline']),
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prefixCls: PropTypes.string,
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level: PropTypes.number,
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theme: PropTypes.string,
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overflowedIndicator: PropTypes.node,
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visible: PropTypes.bool,
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hiddenClassName: PropTypes.string,
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tag: PropTypes.string.def('div')
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};
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export default DOMWrap; |