parttimejob/node_modules/zrender/lib/graphic/helper/roundRect.js

export function buildPath(ctx, shape) {
    var x = shape.x;
    var y = shape.y;
    var width = shape.width;
    var height = shape.height;
    var r = shape.r;
    var r1;
    var r2;
    var r3;
    var r4;
    if (width < 0) {
        x = x + width;
        width = -width;
    }
    if (height < 0) {
        y = y + height;
        height = -height;
    }
    if (typeof r === 'number') {
        r1 = r2 = r3 = r4 = r;
    }
    else if (r instanceof Array) {
        if (r.length === 1) {
            r1 = r2 = r3 = r4 = r[0];
        }
        else if (r.length === 2) {
            r1 = r3 = r[0];
            r2 = r4 = r[1];
        }
        else if (r.length === 3) {
            r1 = r[0];
            r2 = r4 = r[1];
            r3 = r[2];
        }
        else {
            r1 = r[0];
            r2 = r[1];
            r3 = r[2];
            r4 = r[3];
        }
    }
    else {
        r1 = r2 = r3 = r4 = 0;
    }
    var total;
    if (r1 + r2 > width) {
        total = r1 + r2;
        r1 *= width / total;
        r2 *= width / total;
    }
    if (r3 + r4 > width) {
        total = r3 + r4;
        r3 *= width / total;
        r4 *= width / total;
    }
    if (r2 + r3 > height) {
        total = r2 + r3;
        r2 *= height / total;
        r3 *= height / total;
    }
    if (r1 + r4 > height) {
        total = r1 + r4;
        r1 *= height / total;
        r4 *= height / total;
    }
    ctx.moveTo(x + r1, y);
    ctx.lineTo(x + width - r2, y);
    r2 !== 0 && ctx.arc(x + width - r2, y + r2, r2, -Math.PI / 2, 0);
    ctx.lineTo(x + width, y + height - r3);
    r3 !== 0 && ctx.arc(x + width - r3, y + height - r3, r3, 0, Math.PI / 2);
    ctx.lineTo(x + r4, y + height);
    r4 !== 0 && ctx.arc(x + r4, y + height - r4, r4, Math.PI / 2, Math.PI);
    ctx.lineTo(x, y + r1);
    r1 !== 0 && ctx.arc(x + r1, y + r1, r1, Math.PI, Math.PI * 1.5);
}