highcharts/es-modules/Extensions/SeriesLabel/SeriesLabelUtilities.js

JavaScript charting framework

/* *
 *
 *  (c) 2009-2026 Highsoft AS
 *  Author: Torstein Hønsi
 *
 *  A commercial license may be required depending on use.
 *  See www.highcharts.com/license
 *
 *
 * */
'use strict';
/* *
 *
 *  Functions
 *
 * */
/**
 * Counter-clockwise, part of the fast line intersection logic.
 *
 * @internal
 * @function ccw
 */
function ccw(x1, y1, x2, y2, x3, y3) {
    const cw = ((y3 - y1) * (x2 - x1)) - ((y2 - y1) * (x3 - x1));
    return cw > 0 ? true : !(cw < 0);
}
/**
 * Detect if two lines intersect.
 *
 * @internal
 * @function intersectLine
 */
function intersectLine(x1, y1, x2, y2, x3, y3, x4, y4) {
    return ccw(x1, y1, x3, y3, x4, y4) !== ccw(x2, y2, x3, y3, x4, y4) &&
        ccw(x1, y1, x2, y2, x3, y3) !== ccw(x1, y1, x2, y2, x4, y4);
}
/**
 * Detect if a box intersects with a line.
 *
 * @internal
 * @function boxIntersectLine
 */
function boxIntersectLine(x, y, w, h, x1, y1, x2, y2) {
    return (intersectLine(x, y, x + w, y, x1, y1, x2, y2) || // Top of label
        intersectLine(x + w, y, x + w, y + h, x1, y1, x2, y2) || // Right
        intersectLine(x, y + h, x + w, y + h, x1, y1, x2, y2) || // Bottom
        intersectLine(x, y, x, y + h, x1, y1, x2, y2) // Left of label
    );
}
/** @internal */
function intersectRect(r1, r2) {
    return !(r2.left > r1.right ||
        r2.right < r1.left ||
        r2.top > r1.bottom ||
        r2.bottom < r1.top);
}
/* *
 *
 *  Default Export
 *
 * */
/** @internal */
const SeriesLabelUtilities = {
    boxIntersectLine,
    intersectRect
};
/** @internal */
export default SeriesLabelUtilities;