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