@blueprintjs/table
Version:
Scalable interactive table component
57 lines • 2.63 kB
JavaScript
/*
* Copyright 2016 Palantir Technologies, Inc. All rights reserved.
*
* 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 classNames from "classnames";
import * as React from "react";
import { Utils as CoreUtils } from "@blueprintjs/core";
import * as Classes from "../common/classes";
export class GuideLayer extends React.Component {
shouldComponentUpdate(nextProps) {
if (this.props.className !== nextProps.className) {
return true;
}
// shallow-comparing guide arrays leads to tons of unnecessary re-renders, so we check the
// array contents explicitly.
return (!CoreUtils.arraysEqual(this.props.verticalGuides, nextProps.verticalGuides) ||
!CoreUtils.arraysEqual(this.props.horizontalGuides, nextProps.horizontalGuides));
}
render() {
const { verticalGuides, horizontalGuides, className } = this.props;
const verticals = verticalGuides == null ? undefined : verticalGuides.map(this.renderVerticalGuide);
const horizontals = horizontalGuides == null ? undefined : horizontalGuides.map(this.renderHorizontalGuide);
return (React.createElement("div", { className: classNames(className, Classes.TABLE_OVERLAY_LAYER) },
verticals,
horizontals));
}
renderVerticalGuide = (offset, index) => {
const style = {
left: `${offset}px`,
};
const className = classNames(Classes.TABLE_OVERLAY, Classes.TABLE_VERTICAL_GUIDE, {
[`${Classes.TABLE_VERTICAL_GUIDE}-flush-left`]: offset === 0,
});
return React.createElement("div", { className: className, key: index, style: style });
};
renderHorizontalGuide = (offset, index) => {
const style = {
top: `${offset}px`,
};
const className = classNames(Classes.TABLE_OVERLAY, Classes.TABLE_HORIZONTAL_GUIDE, {
[`${Classes.TABLE_HORIZONTAL_GUIDE}-flush-top`]: offset === 0,
});
return React.createElement("div", { className: className, key: index, style: style });
};
}
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