swOperation/node_modules/@antv/g2/esm/transform/pack.js

import { deepMix } from '@antv/util';
import { calcBBox } from '../utils/vector';
function modifier(P, count, layout) {
    const pcount = P.length;
    if (pcount === 0)
        return [];
    // col * row >= count
    // row is close to col * aspect, so
    // col * (col * aspect) >= count
    const { innerWidth, innerHeight } = layout;
    const aspect = innerHeight / innerWidth;
    let col = Math.ceil(Math.sqrt(count / aspect));
    // Increase col to avoid total height of packed shape
    // being large than height of bbox.
    let size = innerWidth / col;
    let row = Math.ceil(count / col);
    let h0 = row * size;
    while (h0 > innerHeight) {
        col = col + 1;
        size = innerWidth / col;
        row = Math.ceil(count / col);
        h0 = row * size;
    }
    // Some offset to increase the space usage.
    const space = innerHeight - row * size;
    const intervalY = row <= 1 ? 0 : space / (row - 1);
    const [offsetX, offsetY] = row <= 1
        ? [(innerWidth - pcount * size) / (pcount - 1), (innerHeight - size) / 2]
        : [0, 0];
    return P.map((points, m) => {
        const [x, y, width, height] = calcBBox(points);
        const i = m % col;
        const j = Math.floor(m / col);
        const newX = i * size;
        const newY = (row - j - 1) * size + space;
        const sx = size / width;
        const sy = size / height;
        // Translate the shape and mark to make sure the center of
        // shape is overlap before and after scale transformation.
        const tx = newX - x + offsetX * i;
        const ty = newY - y - intervalY * j - offsetY;
        return `translate(${tx}, ${ty}) scale(${sx}, ${sy})`;
    });
}
/**
 * Uniform pack to avid overlap.
 * @todo Improve or change algorithm to increase space usage.
 * @todo Take some special case into account.
 */
export const Pack = () => {
    return (I, mark) => {
        return [I, deepMix({}, mark, { modifier, axis: false })];
    };
};
Pack.props = {};
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