initThemeConfig method

@override void initThemeConfig(String configId, { BaseCommonConfig? currentLevelCommonConfig, })

部分代码示意如下：

cardTitleConfig.detailTextStyle.merge(
  BrnTextStyle(
    color: commonConfig.colorTextBase,
    fontSize: commonConfig.fontSizeBase,
  ).merge(detailTextStyle),
);

- 以 `commonConfig` 字段为基础 merge `detailTextStyle`。
  `detailTextStyle` 字段优先级高，当detailTextStyle中字段（如 color）为 null 时
  会使用 `commonConfig.colorTextBase`。
- 以默认上一级配置为基础 merge 第一步的结果，当第一步中字段（如 color）为空时，
  使用上一层级配置的 color (`cardTitleConfig.detailTextStyle.color`)。

Implementation

@override
void initThemeConfig(
  String configId, {
  BaseCommonConfig? currentLevelCommonConfig,
}) {
  super.initThemeConfig(
    configId,
    currentLevelCommonConfig: currentLevelCommonConfig,
  );

  /// 用户全局组件配置
  PickerConfig pickerConfig =
      BaseThemeConfig.instance.getConfig(configId: configId).pickerConfig;

  _backgroundColor ??= pickerConfig.backgroundColor;
  _pickerHeight ??= pickerConfig.pickerHeight;
  _titleHeight ??= pickerConfig.titleHeight;
  _itemHeight ??= pickerConfig.itemHeight;
  _dividerColor ??= pickerConfig.dividerColor;
  _cornerRadius ??= pickerConfig.cornerRadius;
  _titleTextStyle = pickerConfig.titleTextStyle.merge(
    BaseTextStyle(
      color: commonConfig.colorTextBase,
      fontSize: commonConfig.fontSizeSubHead,
    ).merge(_titleTextStyle),
  );
  _cancelTextStyle = pickerConfig.cancelTextStyle
      .merge(
        BaseTextStyle(
          color: commonConfig.colorTextBase,
          fontSize: commonConfig.fontSizeSubHead,
        ),
      )
      .merge(_cancelTextStyle);
  _confirmTextStyle = pickerConfig.confirmTextStyle.merge(
    BaseTextStyle(
      color: commonConfig.brandPrimary,
      fontSize: commonConfig.fontSizeSubHead,
    ).merge(_confirmTextStyle),
  );
  _itemTextStyle = pickerConfig.itemTextStyle.merge(
    BaseTextStyle(
      color: commonConfig.colorTextBase,
      fontSize: commonConfig.fontSizeHead,
    ).merge(_itemTextStyle),
  );
  _itemTextSelectedStyle = pickerConfig.itemTextSelectedStyle.merge(
    BaseTextStyle(
      color: commonConfig.brandPrimary,
      fontSize: commonConfig.fontSizeHead,
    ).merge(_itemTextSelectedStyle),
  );
}