Method getOptionScopes

src/core/core.config.js:296–325

* Resolves the objects from options and defaults for option value resolution. * @param {object} mainScope - The main scope object for options * @param {string[][]} keyLists - The arrays of keys in resolution order * @param {boolean} [resetCache] - reset the cache for this mainScope

(mainScope, keyLists, resetCache)

   * @param {boolean} [resetCache] - reset the cache for this mainScope
   */
  getOptionScopes(mainScope, keyLists, resetCache) {
    const {options, type} = this;
    const cache = this._cachedScopes(mainScope, resetCache);
    const cached = cache.get(keyLists);
    if (cached) {
      return cached;
    }

    const scopes = new Set();

    keyLists.forEach(keys => {
      if (mainScope) {
        scopes.add(mainScope);
        keys.forEach(key => addIfFound(scopes, mainScope, key));
      }
      keys.forEach(key => addIfFound(scopes, options, key));
      keys.forEach(key => addIfFound(scopes, overrides[type] || {}, key));
      keys.forEach(key => addIfFound(scopes, defaults, key));
      keys.forEach(key => addIfFound(scopes, descriptors, key));
    });

    const array = Array.from(scopes);
    if (array.length === 0) {
      array.push(Object.create(null));
    }
    if (keysCached.has(keyLists)) {
      cache.set(keyLists, array);
    }
    return array;
  }

  /**
   * Returns the option scopes for resolving chart options