@uifabric/merge-styles/lib/mergeStyleSets.js

Style loading utilities.

import { concatStyleSets } from './concatStyleSets';
import { extractStyleParts } from './extractStyleParts';
import { getStyleOptions } from './StyleOptionsState';
import { applyRegistration, styleToRegistration } from './styleToClassName';
/**
 * Takes in one or more style set objects, each consisting of a set of areas,
 * each which will produce a class name. Using this is analogous to calling
 * `mergeStyles` for each property in the object, but ensures we maintain the
 * set ordering when multiple style sets are merged.
 *
 * @param styleSets - One or more style sets to be merged.
 */
export function mergeStyleSets() {
    var styleSets = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        styleSets[_i] = arguments[_i];
    }
    return mergeCssSets(styleSets, getStyleOptions());
}
/**
 * Takes in one or more style set objects, each1consisting of a set of areas,
 * each which will produce a class name. Using this is analogous to calling
 * `mergeCss` for each property in the object, but ensures the
 * set ordering when multiple style sets are merged.
 *
 * @param styleSets - One or more style sets to be merged.
 * @param options - (optional) Options to use when creating rules.
 */
export function mergeCssSets(styleSets, options) {
    var _a, _b;
    var classNameSet = { subComponentStyles: {} };
    var styleSet = styleSets[0];
    if (!styleSet && styleSets.length <= 1) {
        return { subComponentStyles: {} };
    }
    var concatenatedStyleSet = concatStyleSets.apply(void 0, styleSets);
    var registrations = [];
    for (var styleSetArea in concatenatedStyleSet) {
        if (concatenatedStyleSet.hasOwnProperty(styleSetArea)) {
            if (styleSetArea === 'subComponentStyles') {
                classNameSet.subComponentStyles = concatenatedStyleSet.subComponentStyles || {};
                continue;
            }
            var styles = concatenatedStyleSet[styleSetArea];
            var _c = extractStyleParts(styles), classes = _c.classes, objects = _c.objects;
            if ((_a = objects) === null || _a === void 0 ? void 0 : _a.length) {
                var registration = styleToRegistration(options || {}, { displayName: styleSetArea }, objects);
                if (registration) {
                    registrations.push(registration);
                    classNameSet[styleSetArea] = classes.concat([registration.className]).join(' ');
                }
            }
            else {
                classNameSet[styleSetArea] = classes.join(' ');
            }
        }
    }
    for (var _i = 0, registrations_1 = registrations; _i < registrations_1.length; _i++) {
        var registration = registrations_1[_i];
        if (registration) {
            applyRegistration(registration, (_b = options) === null || _b === void 0 ? void 0 : _b.specificityMultiplier);
        }
    }
    return classNameSet;
}
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