Dynamic route titles

[Legioth]

For a navigation target that implements HasDynamicTitle, its getTitle method is run after delivering BeforeNavigationEvent to get the title to use when navigation to that view.

It is not legal for a class to both implement HasDynamicTitle and have a @Title annotation, which should be detected at initialization phase.

@Route("blog")
public void BlogPage extends Div  implements HasUrlParameter<String>, HasDynamicTitle {
  @Override
  public void setParameter(BeforeNavigationEvent event, String id) {
    showPost(BlogService.get().findPost(id));
  }

  @Override
  public String getTitle() {
    return getCurrentPost().getTitle();
  }
}

[torok-peter]

As it turned out that HtmlComponent already has a getTitle method but with different signature, it was decided to rename HasDynamicTitle::getTitle to getPageTitle to avoid conflicts. And for consistency, the Title annotation is also renamed to PageTitle.