Breadcrumbs::selected() method for highlighting menu items

[d13r]

I'm considering adding a Breadcrumbs::selected() (or active()?) method that lets you determine whether a given page is currently active, or is a parent of this page. This would help when building navigation menus.

// In app/breadcrumbs.php
Breadcrumbs::register('home', function($breadcrumbs) {
    $breadcrumbs->push('Home', route('home'));
});

Breadcrumbs::register('kb', function($breadcrumbs) {
    $breadcrumbs->parent('home');
    $breadcrumbs->push('Knowledgebase', route('kb'));
});

Breadcrumbs::register('kb.page', function($breadcrumbs, $page) {
    $breadcrumbs->parent('kb');
    $breadcrumbs->push($page->title, route('kb.page', $page->id));
});

// In view:
Breadcrumbs::render('kb.page', $page);

// In layout:
Breadcrumbs::selected('kb.page', $page); // true
Breadcrumbs::selected('kb'); // true
Breadcrumbs::selected('somethingelse'); // false

However, this depends on render() being called before selected(), which is not ideal. (See #16 for a possible solution.)

It is also not strictly related to breadcrumbs, so perhaps it should be done in a separate package...

There is a first attempt at this in 43688d3, but it only checks the current page, not the parents.

[d13r]

No longer planning to do this - there's probably a better solution anyway.