superset index 源码
superset index 代码
文件路径：/superset-frontend/src/dashboard/components/dnd/handleScroll/index.ts
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
let scrollTopDashboardInterval: any;
const SCROLL_STEP = 120;
const INTERVAL_DELAY = 50;
export default function handleScroll(scroll: string) {
const setupScroll =
scroll === 'SCROLL_TOP' &&
!scrollTopDashboardInterval &&
document.documentElement.scrollTop !== 0;
const clearScroll =
scrollTopDashboardInterval &&
(scroll !== 'SCROLL_TOP' || document.documentElement.scrollTop === 0);
if (setupScroll) {
scrollTopDashboardInterval = setInterval(() => {
if (document.documentElement.scrollTop === 0) {
clearInterval(scrollTopDashboardInterval);
scrollTopDashboardInterval = null;
return;
}
let scrollTop = document.documentElement.scrollTop - SCROLL_STEP;
if (scrollTop < 0) {
scrollTop = 0;
}
window.scroll({
top: scrollTop,
behavior: 'smooth',
});
}, INTERVAL_DELAY);
} else if (clearScroll) {
clearInterval(scrollTopDashboardInterval);
scrollTopDashboardInterval = null;
}
}
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