@visactor/vtable/es/components/axis/band-scale.js

canvas table width high performance

import { BandScale } from "@visactor/vscale";

import { isArray } from "@visactor/vutils";

export class BandAxisScale {
    constructor() {
        this._scale = new BandScale, this._scales = [ this._scale ];
    }
    valueToPosition(value) {
        return this._scale.scale(value);
    }
    getPosition(values) {
        let position = 0, bandScale = this._scale;
        if (1 === this._scales.length || 1 === values.length) position = this.valueToPosition(values[0]); else {
            const max = Math.min(values.length, this._scales.length);
            for (let i = 0; i < max; i++) position += this._scales[i].scale(values[i]);
            bandScale = this._scales[max - 1];
        }
        return {
            position: position,
            bandScale: bandScale
        };
    }
    calcScales(defalutBandInnerPadding, defalutBandOuterPadding) {
        var _a, _b;
        const {bandPadding: bandPadding, paddingInner: paddingInner, paddingOuter: paddingOuter} = this, isBandPaddingArray = isArray(bandPadding), isPaddingInnerArray = isArray(paddingInner), isPaddingOuterArray = isArray(paddingOuter);
        for (let i = 0; i < this._scales.length; i++) {
            const _padding = isBandPaddingArray ? bandPadding[i] : bandPadding, _paddingInner = isPaddingInnerArray ? paddingInner[i] : paddingInner, _paddingOuter = isPaddingOuterArray ? paddingOuter[i] : paddingOuter;
            this._scales[i].paddingInner(null !== (_a = null != _paddingInner ? _paddingInner : _padding) && void 0 !== _a ? _a : defalutBandInnerPadding, !0).paddingOuter(null !== (_b = null != _paddingOuter ? _paddingOuter : _padding) && void 0 !== _b ? _b : defalutBandOuterPadding);
        }
    }
    dataToPosition(values, cfg = {}) {
        var _a;
        if (0 === values.length || 0 === this._scales.length) return 0;
        const {position: position, bandScale: bandScale} = this.getPosition(values);
        return position + bandScale.bandwidth() * (null !== (_a = cfg.bandPosition) && void 0 !== _a ? _a : .5);
    }
    updateScaleDomain(domain) {
        for (let i = 0; i < this._scales.length; i++) this._scales[i].domain(domain);
    }
    updateRange(newRange) {
        const [start, end] = this._scale.range();
        newRange[0] === start && newRange[1] === end || this._scale.range(newRange);
    }
}
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