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Feature: Block-based template parts for Classic themes #3234

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Feature: Block-based template parts for Classic themes #3234

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0200cfd
Feature: Block-based template parts for Classic themes
Mamaduka Sep 13, 2022
b4de22f
Update unit tests
Mamaduka Sep 13, 2022
ecd664a
fix prevent unwanted access of site-editor.php
fabiankaegy Sep 14, 2022
040c485
Merge pull request #48 from fabiankaegy/backport/site-editor-template…
Mamaduka Sep 15, 2022
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10 changes: 9 additions & 1 deletion src/wp-admin/menu.php
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Original file line number Diff line number Diff line change
Expand Up @@ -214,12 +214,20 @@
);
}

if ( ! wp_is_block_theme() && current_theme_supports( 'block-template-parts' ) ) {
$submenu['themes.php'][6] = array(
__( 'Template Parts' ),
'edit_theme_options',
'site-editor.php?postType=wp_template_part',
);
}

$customize_url = add_query_arg( 'return', urlencode( remove_query_arg( wp_removable_query_args(), wp_unslash( $_SERVER['REQUEST_URI'] ) ) ), 'customize.php' );

// Hide Customize link on block themes unless a plugin or theme
// is using 'customize_register' to add a setting.
if ( ! wp_is_block_theme() || has_action( 'customize_register' ) ) {
$position = wp_is_block_theme() ? 7 : 6;
$position = ( wp_is_block_theme() || current_theme_supports( 'block-template-parts' ) ) ? 7 : 6;

$submenu['themes.php'][ $position ] = array( __( 'Customize' ), 'customize', esc_url( $customize_url ), '', 'hide-if-no-customize' );
}
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24 changes: 17 additions & 7 deletions src/wp-admin/site-editor.php
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Expand Up @@ -19,7 +19,7 @@
);
}

if ( ! wp_is_block_theme() ) {
if ( ! ( current_theme_supports( 'block-template-parts' ) || wp_is_block_theme() ) ) {
wp_die( __( 'The theme you are currently using is not compatible with Full Site Editing.' ) );
}

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@fabiankaegy fabiankaegy Sep 14, 2022 •
edited
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@hellofromtonya I belive something like this would solve the case you uncovered in your testing here: #3234 (comment)

With the block-fragments (classic theme with block-based templates) enabled, I am able to directly access /wp-admin/site-editor.php but it's a white screen. No errors in the browser's console or error logs.

Suggested change
$is_template_part_editor = isset( $_GET['postType'] ) && 'wp_template_part' === sanitize_key( $_GET['postType'] );
if ( ! wp_is_block_theme() && ! $is_template_part_editor ) {
wp_die( __( 'The theme you are currently using is not compatible with the Site Editor.' ) );
}

As far as I'm aware that was not a known issue and no patch for it had been created.

@Mamaduka asked me to keep an eye on this PR since he is out traveling. I will create a PR on the Gutenberg Repo to fix the issue there aswell.

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Actually in looking at the code in Gutenberg it was handled as a completely separate admin page. So this issue only exists in this PR and only needs to get fixed here. No backport to Gutenberg is needed.

https://github.com/WordPress/gutenberg/blob/d19258cb5b85cea52e85a3e86c9550dd48d44fca/lib/compat/wordpress-6.1/template-parts-screen.php#L5

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In order to make it easier to test, I have also created a separate PR against @Mamaduka's branch which applies the same fix as the one I have shown in the suggestion above: Mamaduka#48

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Yes, that does resolve it. Well done @fabiankaegy - thank you!

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Thank you!

Expand Down Expand Up @@ -64,14 +64,24 @@ static function( $classes ) {

$block_editor_context = new WP_Block_Editor_Context( array( 'name' => 'core/edit-site' ) );
$custom_settings = array(
'siteUrl' => site_url(),
'postsPerPage' => get_option( 'posts_per_page' ),
'styles' => get_block_editor_theme_styles(),
'defaultTemplateTypes' => $indexed_template_types,
'defaultTemplatePartAreas' => get_allowed_block_template_part_areas(),
'__unstableHomeTemplate' => $home_template,
'siteUrl' => site_url(),
'postsPerPage' => get_option( 'posts_per_page' ),
'styles' => get_block_editor_theme_styles(),
'defaultTemplateTypes' => $indexed_template_types,
'defaultTemplatePartAreas' => get_allowed_block_template_part_areas(),
'supportsLayout' => WP_Theme_JSON_Resolver::theme_has_support(),
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Before, the Site Editor always assumed layout support.

'supportsTemplatePartsMode' => ! wp_is_block_theme() && current_theme_supports( 'block-template-parts' ),
'__unstableHomeTemplate' => $home_template,
);

/**
* We don't need home template resolution when block template parts are supported.
* Set the value to true to satisfy the editor initialization guard clause.
*/
if ( $custom_settings['supportsTemplatePartsMode'] ) {
$custom_settings['__unstableHomeTemplate'] = true;
}

// Add additional back-compat patterns registered by `current_screen` et al.
$custom_settings['__experimentalAdditionalBlockPatterns'] = WP_Block_Patterns_Registry::get_instance()->get_all_registered( true );
$custom_settings['__experimentalAdditionalBlockPatternCategories'] = WP_Block_Pattern_Categories_Registry::get_instance()->get_all_registered( true );
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2 changes: 1 addition & 1 deletion src/wp-includes/functions.php
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Expand Up @@ -5261,7 +5261,7 @@ function wp_widgets_add_menu() {
}

$menu_name = __( 'Widgets' );
if ( wp_is_block_theme() ) {
if ( wp_is_block_theme() || current_theme_supports( 'block-template-parts' ) ) {
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We need this to avoid conflicts between the Customize and Widgets menu positions.

$submenu['themes.php'][] = array( $menu_name, 'edit_theme_options', 'widgets.php' );
} else {
$submenu['themes.php'][7] = array( $menu_name, 'edit_theme_options', 'widgets.php' );
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7 changes: 7 additions & 0 deletions src/wp-includes/theme.php
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Expand Up @@ -3843,6 +3843,13 @@ function create_initial_theme_features() {
'show_in_rest' => true,
)
);
register_theme_feature(
'block-template-parts',
array(
'description' => __( 'Whether a theme uses block-based template parts.' ),
'show_in_rest' => true,
)
);
register_theme_feature(
'custom-background',
array(
Expand Down