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Navigation Area block #36178

Merged
merged 36 commits into from
Nov 5, 2021
Merged

Navigation Area block #36178

merged 36 commits into from
Nov 5, 2021

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adamziel
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@adamziel adamziel commented Nov 3, 2021

Description

This PR proposes preserving navigation on theme switch by introducing a "Navigation Area" block.

Relies on #36212

The gist here is that:

  • themes define areas
  • if theme A's areas match theme B's areas we then reuse the navigation CPT
  • theme A and B in their templates use a navigation area block to wrap their menus
  • menu to area relationship is saved via site options like { "primary": 794, "secondary": 112 }

Theme authors would ship the following HTML in their templates:

<!-- wp:navigation-area {"area":"primary"} -->
<!-- wp:navigation /-->
<!-- /wp:navigation-area -->

Which makes the nested navigation block use the wp_navigation post associated with the primary area.

Changing saving the navigation area changes the post ID to which the primary area is mapped. The nice part is that this PR uses the entity system, which gives us things like in-editor synchronization and confirmation dialogs for free.

See this a short video from the site editor. I wrestled with GB a bit but it worked more-or-less as intended, maybe except of the unsaved menu:

CleanShot.2021-11-03.at.15.59.49.mp4

Switching to another theme just works.

About design choices

  • I used site_options because this is a minimal mapping that doesn't need anything fancier. Taxonomies could go wrong in that they can express multiple posts pointing to the same area. This mapping can't.
  • The navigation block understands the concept of an area so that it can call setAreaMenu if another menu is selected.

What's missing:

  • Linting
  • Unit tests for the endpoint
  • Group block-like selection mechanics for the Navigation Area block

@adamziel adamziel self-assigned this Nov 3, 2021
@adamziel adamziel added [Block] Navigation Affects the Navigation Block [Feature] Navigation Screen [Feature] Navigation Component A navigational waterfall component for hierarchy of items. labels Nov 3, 2021
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Size Change: +488 B (0%)

Total Size: 1.08 MB

Filename Size Change
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build/block-library/index.min.js 159 kB +412 B (0%)
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ℹ️ View Unchanged
Filename Size
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compressed-size-action

@adamziel
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adamziel commented Nov 3, 2021

Something like this could be useful in the navigation/index.php, too:

	if ( ! empty( $block->context['navigationArea'] ) ) {
		$area = $block->context['navigationArea'];
		$mapping = get_option( 'fse_navigation_areas', array() );
		if ( ! empty( $mapping[ $area ] ) ) {
			$attributes[ 'navigationMenuId' ] = $mapping[ $area ];
		}
	}

Edit: I just added it

@talldan
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talldan commented Nov 4, 2021

In testing, it's working very well. Switching themes is working flawlessly when they have these navigation areas defined. I don't see any reason not to progress with this. It'd be a matter of priority to update bundled theme templates with this new block and to get the word out to theme developers about it (I'll add 'Needs dev note').

There's a small bit of a glitch when switching menus sometimes—on the odd occasion it considers the menu 'unsaved'. I think this is a bug in trunk though, so I'll work on fixing that as a separate effort.

Some potential opportunities:

  • We can preload the navigation menus for each defined navigation area. This is great as they can take a little while to load.
  • We could look into migrating __unstableLocation to this block for universal themes. (not needed for 5.9)

@talldan talldan added Needs Dev Note Requires a developer note for a major WordPress release cycle New Block Suggestion for a new block labels Nov 4, 2021
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Tentatively giving this approval, so that there's no issue with it being merged in time for 5.9.

Really happy with how it works, and it looks like there are only minor changes and tests remaining. Look forward to getting this shipped, great work @adamziel!

@adamziel adamziel changed the title [Draft] Navigation area block Navigation Area block Nov 4, 2021
@talldan talldan force-pushed the try/nav-area-block branch from ad86149 to e7bc4a1 Compare November 5, 2021 08:18
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Approving again for good luck.

@adamziel
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adamziel commented Nov 5, 2021

Merging for good luck.

@adamziel adamziel merged commit 5fc66ef into trunk Nov 5, 2021
@adamziel adamziel deleted the try/nav-area-block branch November 5, 2021 09:34
@github-actions github-actions bot added this to the Gutenberg 11.9 milestone Nov 5, 2021
@MaggieCabrera
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MaggieCabrera commented Nov 5, 2021

We could look into migrating __unstableLocation to this block for universal themes. (not needed for 5.9)

Yes please! Not just for Universal themes but for users who switch from a classic theme to a block theme too

navigationAreas?.map( ( { name, description } ) => ( {
label: description,
value: name,
} ) ),
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Let's do || [] to prevent a null value making it to MenuItemsChoice

);
return {
navigationAreas: getEntityRecords( 'root', 'navigationArea' ),
hasResolvedNavigationAreas: hasFinishedResolution(
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We could do && navigationAreas.length to prevent pretending everything is fine when there are no areas

@talldan
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talldan commented Nov 5, 2021

Yes please! Not just for Universal themes but for users who switch from a classic theme to a block theme too

👍 Absolutely, that's a very good point, we need to get our thinking caps on about the classic theme to block theme migration.

It shouldn't be too difficult, we need hook into theme switch, figure out which classic menu is assigned to a corresponding navigation area, create a wp_navigation post with the menu items converted to blocks, and then assign its id to the navigation area.

@getdave
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getdave commented Nov 5, 2021

It shouldn't be too difficult, we need hook into theme switch, figure out which classic menu is assigned to a corresponding navigation area, create a wp_navigation post with the menu items converted to blocks, and then assign its id to the navigation area.

I detailed the existing classic mechanic in #35750 (comment). Hopefully this serves as inspiration for an automated mapping solution.

I will say again that I think that on Theme switch, the classic menu should be copied/cloned and converted into a block based menu leaving the original in place. If the user switches back to a classic theme, then we should allow that classic theme to simply pull through the original classic menu.

@adamziel
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adamziel commented Nov 5, 2021

Maybe the first, __unstable version could just reuse the navigation editor code to bring in the classic menu as blocks on the editor load, and then, on save, store them as a wp_navigation post?

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adamziel commented Nov 5, 2021

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Posted some early thoughts. Will review again later.

'callback' => array( $this, 'update_item' ),
'permission_callback' => array( $this, 'update_item_permissions_check' ),
'args' => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
),
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Are we going to add support for batching?

foreach ( gutenberg_get_navigation_areas() as $name => $description ) {
$area = $this->get_navigation_area_object( $name );
$area = $this->prepare_item_for_response( $area, $request );
$data[ $name ] = $this->prepare_response_for_collection( $area );
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@TimothyBJacobs what do you think if this? Other endpoints simple are a flat array. A key based array is different from other endpoints.

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We do have a couple of object responses, but an array is preferable because the REST API does assume that collection responses are lists.

private function get_navigation_area_object( $name ) {
$available_areas = gutenberg_get_navigation_areas();
$mapping = get_option( 'fse_navigation_areas', array() );
$area = new stdClass();
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Could we create a custom object for this?

);
foreach ( $active_areas as $post_id ) {
if ( 0 !== $post_id ) {
$paths[] = "/wp/v2/navigation/$post_id?context=edit";
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$paths[] = add_query_args( 'context', 'edit', rest_get_route_for_post( $post_id ) );

@spacedmonkey
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Sorry I missed this PR. I added my thoughts on the PR anyway, in hope that some of my questions are answered

Comment on lines +532 to +544
function gutenberg_register_navigation_areas( $new_areas ) {
global $gutenberg_navigation_areas;
$gutenberg_navigation_areas = $new_areas;
}

// Register the default navigation areas.
gutenberg_register_navigation_areas(
array(
'primary' => 'Primary',
'secondary' => 'Secondary',
'tertiary' => 'Tertiary',
)
);
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Something I just noticed. If a theme dev is able to change the keys here by calling register_navigation_areas it'll degrade the capability of theme migration. This is a problem we have with the existing menus system in WordPress.

An example - one theme calls a menu location 'Header', the other 'Primary', and when switching no migration happens because the names don't match.

The way around this, I think, is to keep an internal representation of the area primary, secondary (or maybe even just an index 0, 1), but allow users to set a name that's used in the UI ('Header', 'Footer').

I quite like the idea of:

	array(
		'primary'   => 'Header',
		'secondary' => 'Sidebar',
		'tertiary'  => 'Footer',
	)

But then what if I have four or five or ten navigation areas? What comes after tertiary?

It's a difficult problem, but I think we should try to solve it for 5.9 by improving this function. Lets come up with some ideas for this.

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@getdave getdave Nov 11, 2021

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I think we should provide some strong defaults but allow users to change extend how they like.

Most devs will stick with the convention that comes by default so that will solve 80% use case of Theme switch.

If a Theme dev choose to alter the area name then they will need to handle the situation where navigations don't migrate across on Theme switch. This provides a big incentive to stick with the registered defaults.

I didn't realise that register_navigation_areas would overwrite the existing items. If that's the case then I think we should make that function private and instead provide a filter. This approach is more "WordPress" and also tends to encourage extension rather than wholesale overwriting.

What comes after tertiary?

quaternary, quinary, senary, septenary, octonary, nonary, denary.

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I've added a comment over here - #36373 (comment)

@talldan talldan removed the Needs Dev Note Requires a developer note for a major WordPress release cycle label Dec 14, 2021
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Navigation block - preserve navigation block data on theme switching
8 participants