Examples with HierarchicalThemeSource org.springframework.ui.context.HierarchicalThemeSource used on opensource projects

Example 1 with HierarchicalThemeSource

use of org.springframework.ui.context.HierarchicalThemeSource in project spring-framework by spring-projects.

the class UiApplicationContextUtils method initThemeSource.

/**
	 * Initialize the ThemeSource for the given application context,
	 * autodetecting a bean with the name "themeSource". If no such
	 * bean is found, a default (empty) ThemeSource will be used.
	 * @param context current application context
	 * @return the initialized theme source (will never be {@code null})
	 * @see #THEME_SOURCE_BEAN_NAME
	 */
public static ThemeSource initThemeSource(ApplicationContext context) {
    if (context.containsLocalBean(THEME_SOURCE_BEAN_NAME)) {
        ThemeSource themeSource = context.getBean(THEME_SOURCE_BEAN_NAME, ThemeSource.class);
        // Make ThemeSource aware of parent ThemeSource.
        if (context.getParent() instanceof ThemeSource && themeSource instanceof HierarchicalThemeSource) {
            HierarchicalThemeSource hts = (HierarchicalThemeSource) themeSource;
            if (hts.getParentThemeSource() == null) {
                // Only set parent context as parent ThemeSource if no parent ThemeSource
                // registered already.
                hts.setParentThemeSource((ThemeSource) context.getParent());
            }
        }
        if (logger.isDebugEnabled()) {
            logger.debug("Using ThemeSource [" + themeSource + "]");
        }
        return themeSource;
    } else {
        // Use default ThemeSource to be able to accept getTheme calls, either
        // delegating to parent context's default or to local ResourceBundleThemeSource.
        HierarchicalThemeSource themeSource = null;
        if (context.getParent() instanceof ThemeSource) {
            themeSource = new DelegatingThemeSource();
            themeSource.setParentThemeSource((ThemeSource) context.getParent());
        } else {
            themeSource = new ResourceBundleThemeSource();
        }
        if (logger.isDebugEnabled()) {
            logger.debug("Unable to locate ThemeSource with name '" + THEME_SOURCE_BEAN_NAME + "': using default [" + themeSource + "]");
        }
        return themeSource;
    }
}