@visactor/vgrammar-core/cjs/transforms/mark/jitter.js

VGrammar is a visual grammar library

"use strict";

Object.defineProperty(exports, "__esModule", {
    value: !0
}), exports.transform = exports.jitterX = exports.jitterY = void 0;

const vutils_1 = require("@visactor/vutils"), vgrammar_util_1 = require("@visactor/vgrammar-util"), scale_1 = require("../../util/scale"), jitterByChannel = (options, upstreamData, channel) => {
    var _a, _b, _c, _d;
    const mark = upstreamData[0].mark, scale = null === (_a = mark.getScalesByChannel()) || void 0 === _a ? void 0 : _a[channel], random = null !== (_b = options.random) && void 0 !== _b ? _b : Math.random, ratio = Math.min(null !== (_c = "x" === channel ? options.widthRatio : options.heightRatio) && void 0 !== _c ? _c : .4, .5), bandSize = null !== (_d = "x" === channel ? options.bandWidth : options.bandHeight) && void 0 !== _d ? _d : (0, 
    scale_1.getBandWidthOfScale)(scale);
    if ((0, vutils_1.isNil)(bandSize)) {
        let domain = (0, vgrammar_util_1.extent)(upstreamData, (el => el.getItemAttribute(channel)));
        if ((0, vutils_1.isNil)(domain[0]) || (0, vutils_1.isNil)(domain[1]) || domain[0] === domain[1]) {
            const viewBox = mark.view.getViewBox();
            domain = "x" === channel ? [ viewBox.x1, viewBox.x2 ] : [ viewBox.y1, viewBox.y2 ];
        }
        const length = upstreamData.length;
        upstreamData.forEach(((element, index) => {
            element.setItemAttributes({
                [channel]: domain[0] + (domain[1] - domain[0]) * random(index, length)
            });
        }));
    } else {
        const length = upstreamData.length;
        upstreamData.forEach(((element, index) => {
            const val = element.getItemAttribute(channel), domain = [ val - ratio * bandSize, val + ratio * bandSize ];
            element.setItemAttributes({
                [channel]: domain[0] + (domain[1] - domain[0]) * random(index, length)
            });
        }));
    }
}, jitterY = (options, upstreamData) => {
    var _a;
    return upstreamData && 0 !== upstreamData.length && (null === (_a = upstreamData[0]) || void 0 === _a ? void 0 : _a.mark) ? jitterByChannel(options, upstreamData, "y") : upstreamData;
};

exports.jitterY = jitterY;

const jitterX = (options, upstreamData) => {
    var _a;
    return upstreamData && 0 !== upstreamData.length && (null === (_a = upstreamData[0]) || void 0 === _a ? void 0 : _a.mark) ? jitterByChannel(options, upstreamData, "x") : upstreamData;
};

exports.jitterX = jitterX;

const transform = (options, upstreamData) => {
    var _a;
    return upstreamData && 0 !== upstreamData.length && (null === (_a = upstreamData[0]) || void 0 === _a ? void 0 : _a.mark) ? (jitterByChannel(options, upstreamData, "x"), 
    jitterByChannel(options, upstreamData, "y"), upstreamData) : upstreamData;
};

exports.transform = transform;
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