@1771technologies/lytenyte-pro/dist/cell-selection/split-on-pivot.js

Blazingly fast headless React data grid with 100s of features.

import { areRectsEqual } from "./are-rects-equal.js";
export function splitOnPivot(rect, pivot) {
    if (rect.isUnit || areRectsEqual(rect, pivot))
        return null;
    const splits = [];
    const isAfter = pivot.columnStart > rect.columnStart;
    const isSame = pivot.columnStart === rect.columnStart && pivot.columnEnd === rect.columnEnd;
    // The pivot is on the right side of the rect. So we split by end
    if (isAfter) {
        const split = { ...rect, columnEnd: rect.columnEnd - 1, borderEnd: false };
        if (split.columnStart !== split.columnEnd)
            splits.push(split);
    }
    else {
        const split = {
            ...rect,
            columnStart: rect.columnStart + 1,
            borderStart: false,
        };
        if (split.columnStart !== split.columnEnd)
            splits.push(split);
    }
    if (pivot.rowStart > rect.rowStart) {
        const split = {
            ...rect,
            columnStart: pivot.columnStart,
            columnEnd: pivot.columnEnd,
            rowEnd: rect.rowEnd - 1,
            borderBottom: false,
            borderStart: !isAfter,
            borderEnd: isSame || isAfter,
        };
        if (split.rowStart !== split.rowEnd)
            splits.push(split);
    }
    else {
        const split = {
            ...rect,
            columnStart: pivot.columnStart,
            columnEnd: pivot.columnEnd,
            rowStart: rect.rowStart + 1,
            borderTop: false,
            borderStart: !isAfter,
            borderEnd: isSame || isAfter,
        };
        if (split.rowStart !== split.rowEnd)
            splits.push(split);
    }
    return splits;
}