mirror of
https://github.com/element-hq/element-web.git
synced 2024-12-16 01:51:31 +03:00
344dac4fb9
We use `export default` begrudgingly here. Ideally we'd use just `export`, though this entire SDK expects things to be exported as a default. Instead of breaking everything, we'll sacrifice our export pattern for a smaller diff - a later commit can always do the default export -> regular export conversion.
102 lines
3.7 KiB
JavaScript
102 lines
3.7 KiB
JavaScript
/*
|
|
Copyright 2016 OpenMarket Ltd
|
|
Copyright 2017 New Vector Ltd
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
import React from 'react';
|
|
import PropTypes from 'prop-types';
|
|
import createReactClass from 'create-react-class';
|
|
import { _t } from '../../../languageHandler';
|
|
|
|
export default createReactClass({
|
|
displayName: 'TruncatedList',
|
|
|
|
propTypes: {
|
|
// The number of elements to show before truncating. If negative, no truncation is done.
|
|
truncateAt: PropTypes.number,
|
|
// The className to apply to the wrapping div
|
|
className: PropTypes.string,
|
|
// A function that returns the children to be rendered into the element.
|
|
// function getChildren(start: number, end: number): Array<React.Node>
|
|
// The start element is included, the end is not (as in `slice`).
|
|
// If omitted, the React child elements will be used. This parameter can be used
|
|
// to avoid creating unnecessary React elements.
|
|
getChildren: PropTypes.func,
|
|
// A function that should return the total number of child element available.
|
|
// Required if getChildren is supplied.
|
|
getChildCount: PropTypes.func,
|
|
// A function which will be invoked when an overflow element is required.
|
|
// This will be inserted after the children.
|
|
createOverflowElement: PropTypes.func,
|
|
},
|
|
|
|
getDefaultProps: function() {
|
|
return {
|
|
truncateAt: 2,
|
|
createOverflowElement: function(overflowCount, totalCount) {
|
|
return (
|
|
<div>{ _t("And %(count)s more...", {count: overflowCount}) }</div>
|
|
);
|
|
},
|
|
};
|
|
},
|
|
|
|
_getChildren: function(start, end) {
|
|
if (this.props.getChildren && this.props.getChildCount) {
|
|
return this.props.getChildren(start, end);
|
|
} else {
|
|
// XXX: I'm not sure why anything would pass null into this, it seems
|
|
// like a bizzare case to handle, but I'm preserving the behaviour.
|
|
// (see commit 38d5c7d5c5d5a34dc16ef5d46278315f5c57f542)
|
|
return React.Children.toArray(this.props.children).filter((c) => {
|
|
return c != null;
|
|
}).slice(start, end);
|
|
}
|
|
},
|
|
|
|
_getChildCount: function() {
|
|
if (this.props.getChildren && this.props.getChildCount) {
|
|
return this.props.getChildCount();
|
|
} else {
|
|
return React.Children.toArray(this.props.children).filter((c) => {
|
|
return c != null;
|
|
}).length;
|
|
}
|
|
},
|
|
|
|
render: function() {
|
|
let overflowNode = null;
|
|
|
|
const totalChildren = this._getChildCount();
|
|
let upperBound = totalChildren;
|
|
if (this.props.truncateAt >= 0) {
|
|
const overflowCount = totalChildren - this.props.truncateAt;
|
|
if (overflowCount > 1) {
|
|
overflowNode = this.props.createOverflowElement(
|
|
overflowCount, totalChildren,
|
|
);
|
|
upperBound = this.props.truncateAt;
|
|
}
|
|
}
|
|
const childNodes = this._getChildren(0, upperBound);
|
|
|
|
return (
|
|
<div className={this.props.className}>
|
|
{ childNodes }
|
|
{ overflowNode }
|
|
</div>
|
|
);
|
|
},
|
|
});
|