ThemeKey.java

package org.multibit.hd.ui.views.themes;

import org.multibit.hd.ui.languages.Languages;
import org.multibit.hd.ui.languages.MessageKey;

/**
 * <p>Enum to provide the following to Theme API:</p>
 * <ul>
 * <li>Provision of supporting meta-data for a theme</li>
 * </ul>
 *
 * @since 0.0.1
 *
 */
public enum ThemeKey {

  LIGHT(new LightTheme()),
  DARK(new DarkTheme()),
  BOOTSTRAP(new BootstrapTheme()),

  // End of enum
  ;

  private final Theme theme;

  /**
   * @param theme The theme
   */
  ThemeKey(Theme theme) {
    this.theme = theme;
  }

  /**
   * @return The associated singleton instance of the theme
   */
  public Theme theme() {
    return theme;
  }

  /**
   * @return The names of the themes for the current locale
   */
  public static String[] localisedNames() {

    return new String[]{
      Languages.safeText(MessageKey.LIGHT_THEME),
      Languages.safeText(MessageKey.DARK_THEME),
      Languages.safeText(MessageKey.BOOTSTRAP_THEME),
    };

  }

  /**
   * @param theme The theme
   *
   * @return The matching theme key
   */
  public static ThemeKey fromTheme(Theme theme) {

    // Simple approach for a few themes
    if (theme instanceof LightTheme) {
      return LIGHT;
    }
    if (theme instanceof DarkTheme) {
      return DARK;
    }
    if (theme instanceof BootstrapTheme) {
      return BOOTSTRAP;
    }
    throw new IllegalArgumentException("Unknown theme '" + theme.getClass().getName() + "'");
  }
}