@visactor/vscale/es/base-scale.js

Scales for visual encoding, used in VGrammar, VTable

import { clamp, isNil, isValid } from "@visactor/vutils";

import { calculateWholeRangeFromRangeFactor } from "./utils/utils";

export class BaseScale {
    constructor() {
        this._rangeFactorStart = null, this._rangeFactorEnd = null;
    }
    _calculateWholeRange(range) {
        return this._wholeRange ? this._wholeRange : isValid(this._rangeFactorStart) && isValid(this._rangeFactorEnd) && 2 === range.length ? (this._wholeRange = calculateWholeRangeFromRangeFactor(range, [ this._rangeFactorStart, this._rangeFactorEnd ]), 
        this._wholeRange) : range;
    }
    rangeFactor(_, slience, clear) {
        return _ ? (2 === _.length && _.every((r => r >= 0 && r <= 1)) && (this._wholeRange = null, 
        0 === _[0] && 1 === _[1] ? (this._rangeFactorStart = null, this._rangeFactorEnd = null) : (this._rangeFactorStart = _[0], 
        this._rangeFactorEnd = _[1])), this) : clear ? (this._wholeRange = null, this._rangeFactorStart = null, 
        this._rangeFactorEnd = null, this) : isValid(this._rangeFactorStart) && isValid(this._rangeFactorEnd) ? [ this._rangeFactorStart, this._rangeFactorEnd ] : null;
    }
    rangeFactorStart(_, slience) {
        var _a;
        return isNil(_) ? this._rangeFactorStart : (_ >= 0 && _ <= 1 && (this._wholeRange = null, 
        0 !== _ || !isNil(this._rangeFactorEnd) && 1 !== this._rangeFactorEnd ? (this._rangeFactorStart = _, 
        this._rangeFactorEnd = null !== (_a = this._rangeFactorEnd) && void 0 !== _a ? _a : 1) : (this._rangeFactorStart = null, 
        this._rangeFactorEnd = null)), this);
    }
    rangeFactorEnd(_, slience) {
        var _a;
        return isNil(_) ? this._rangeFactorEnd : (_ >= 0 && _ <= 1 && (this._wholeRange = null, 
        0 !== _ || !isNil(this._rangeFactorStart) && 0 !== this._rangeFactorStart ? (this._rangeFactorEnd = _, 
        this._rangeFactorStart = null !== (_a = this._rangeFactorStart) && void 0 !== _a ? _a : 0) : (this._rangeFactorStart = null, 
        this._rangeFactorEnd = null)), this);
    }
    generateFishEyeTransform() {
        var _a;
        if (!this._fishEyeOptions) return void (this._fishEyeTransform = null);
        const {distortion: distortion = 2, radiusRatio: radiusRatio = .1, radius: radius} = this._fishEyeOptions, range = this.range(), first = range[0], last = range[range.length - 1], min = Math.min(first, last), max = Math.max(first, last), focus = clamp(null !== (_a = this._fishEyeOptions.focus) && void 0 !== _a ? _a : 0, min, max), rangeRadius = isNil(radius) ? (max - min) * radiusRatio : radius;
        let k0 = Math.exp(distortion);
        k0 = k0 / (k0 - 1) * rangeRadius;
        const k1 = distortion / rangeRadius;
        this._fishEyeTransform = output => {
            const delta = Math.abs(output - focus);
            if (delta >= rangeRadius) return output;
            if (delta <= 1e-6) return focus;
            const k = k0 * (1 - Math.exp(-delta * k1)) / delta * .75 + .25;
            return focus + (output - focus) * k;
        };
    }
    unknown(_) {
        return arguments.length ? (this._unknown = _, this) : this._unknown;
    }
    get(key, defaultValue) {
        var _a;
        return null !== (_a = null == this ? void 0 : this[key]) && void 0 !== _a ? _a : defaultValue;
    }
}
//# sourceMappingURL=base-scale.js.map