Stop inject_activitypub_options on non-block theme

[edent]

Quick summary

I've recently noticed this script being injected into my pages:

<script>
   var _activityPubOptions = {"namespace":"activitypub\/1.0","defaultAvatarUrl":"https:\/\/example.com\/wp-content\/plugins\/activitypub\/assets\/img\/mp.jpg","enabled":{"site":true,"users":false}};
</script>

I don't use a block theme. This code appears to do nothing. Is there any way to disable inject_activitypub_options?

wordpress-activitypub/includes/class-blocks.php

Line 113 in 007877c

public static function inject_activitypub_options() {

Steps to reproduce

Using a non-Gutenberg theme.

I've disabled some parts of the ActivityPub plugin using:

//	Remove ActivityPub Plugin CSS
function remove_activitypub_block_css(){
	wp_dequeue_style( 'activitypub-followers-style' );
	wp_dequeue_style( 'activitypub-follow-me-style' );
	wp_dequeue_style( 'activitypub-reactions-style' );
}
add_action( 'wp_enqueue_scripts', 'remove_activitypub_block_css', 100 );
/	Remove Fediverse Previews
//	https://github.com/Automattic/wordpress-activitypub/blob/79ce3414b12b6dc80151de22ce10dce8d2cad9ab/includes/class-admin.php#L876
function modify_list_row_actions( $actions, $post ) {
	return array_diff_key( $actions, array( "activitypub" => true ) );
}
add_filter( "post_row_actions", "modify_list_row_actions", 99, 2 );

Site owner impact

Fewer than 20% of the total website/platform users

Severity

Minor

What other impact(s) does this issue have?

No response

If a workaround is available, please outline it here.

No response

[edent]

This can be removed by adding this to functions.php

function remove_activitypub_options_injection() {
	remove_action( 'wp_head', array( 'Activitypub\Blocks', 'inject_activitypub_options' ), 11 );
}
add_action( 'init', 'remove_activitypub_options_injection', 15 );

But it would be great to have a way to disable these features in the UI.

[pfefferle]

@edent have you tried:

add_filter( 'activitypub_site_supports_blocks', '__return_false' );

This should remove everything!

wordpress-activitypub/activitypub.php

Line 87 in 007877c

if ( site_supports_blocks() ) {

[edent]

That doesn't seem to remove the <script>var _activityPubOptions, but it seems to stop some of the stuff in the editor.

[pfefferle]

@edent then let's fix that too :)