@antv/s2/esm/utils/facet.js

effective spreadsheet render core lib

import { findIndex } from 'lodash';
export const getSubTotalNodeWidthOrHeightByLevel = (sampleNodesForAllLevels, level, key) => sampleNodesForAllLevels
    .filter((node) => node.level >= level)
    .map((value) => value[key])
    .reduce((sum, current) => sum + current, 0);
/**
 * 根据视窗高度计算需要展示的数据数组下标
 * 如有2个节点，每个高度30
 * @param heights 所有单元格的高度偏移量数组 [0, 30, 60]
 * @param minHeight 视窗高度起点
 * @param maxHeight 视窗高度终点
 * @returns
 */
export const getIndexRangeWithOffsets = (heights, minHeight, maxHeight) => {
    if (maxHeight <= 0) {
        return {
            start: 0,
            end: 0,
        };
    }
    let yMin = findIndex(heights, (height, idx) => {
        const y = minHeight;
        return y >= height && y < heights[idx + 1];
    }, 0);
    yMin = Math.max(yMin, 0);
    let yMax = maxHeight === minHeight
        ? yMin
        : findIndex(heights, (height, idx) => {
            const y = maxHeight;
            return y > height && y <= heights[idx + 1];
        }, yMin);
    yMax = Math.min(yMax === -1 ? Infinity : yMax, heights.length - 2);
    return {
        start: yMin,
        end: yMax,
    };
};
export const getAdjustedRowScrollX = (rowHeaderScrollX, cornerBBox) => {
    const { width, originalWidth } = cornerBBox;
    const scrollX = Math.min(originalWidth - width, rowHeaderScrollX);
    if (scrollX < 0) {
        return 0;
    }
    return scrollX;
};
export const getAdjustedScrollOffset = (scrollY, contentLength, containerLength) => {
    const offset = Math.min(contentLength - containerLength, scrollY);
    if (offset < 0) {
        return 0;
    }
    return offset;
};
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