@visactor/vchart/esm/model/base-model-transformer.js

charts lib based @visactor/VGrammar

import { isArray } from "../util";

import { mergeSpec } from "@visactor/vutils-extension";

export class BaseModelSpecTransformer {
    constructor(option) {
        this._option = option, this.type = option.type;
    }
    _initTheme(spec, chartSpec) {
        return this._theme = this.getTheme(spec, chartSpec), this._mergeThemeToSpec(spec, chartSpec);
    }
    getTheme(spec, chartSpec) {}
    transformSpec(spec, chartSpec, chartSpecInfo) {
        this._transformSpecBeforeMergingTheme(spec, chartSpec, chartSpecInfo);
        const result = this._initTheme(spec, chartSpec);
        return this._transformSpecAfterMergingTheme(result.spec, chartSpec, chartSpecInfo), 
        result;
    }
    _transformSpecBeforeMergingTheme(spec, chartSpec, chartSpecInfo) {}
    _transformSpecAfterMergingTheme(spec, chartSpec, chartSpecInfo) {}
    _mergeThemeToSpec(spec, chartSpec) {
        const theme = this._theme;
        if (this._shouldMergeThemeToSpec()) {
            const specFromChart = this._getDefaultSpecFromChart(chartSpec), merge = originalSpec => mergeSpec({}, theme, specFromChart, originalSpec);
            return isArray(spec) ? {
                spec: spec.map((specItem => merge(specItem))),
                theme: theme
            } : {
                spec: merge(spec),
                theme: theme
            };
        }
        return {
            spec: spec,
            theme: theme
        };
    }
    _shouldMergeThemeToSpec() {
        return !0;
    }
    _getDefaultSpecFromChart(chartSpec) {}
}
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