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<?php
/**
 * Utilities to manage editor settings.
 *
 * @package gutenberg
 */

/**
 * Returns editor settings that are common to all editors:
 * post, site, widgets, and navigation.
 *
 * All these settings are already part of core,
 * see edit-form-blocks.php
 *
 * @return array Common editor settings.
 */
function gutenberg_get_common_block_editor_settings() {
    $max_upload_size = wp_max_upload_size();
    if ( ! $max_upload_size ) {
        $max_upload_size = 0;
    }

    $available_image_sizes = array();
    // This filter is documented in wp-admin/includes/media.php.
    $image_size_names = apply_filters(
        'image_size_names_choose',
        array(
            'thumbnail' => __( 'Thumbnail', 'gutenberg' ),
            'medium'    => __( 'Medium', 'gutenberg' ),
            'large'     => __( 'Large', 'gutenberg' ),
            'full'      => __( 'Full Size', 'gutenberg' ),
        )
    );
    foreach ( $image_size_names as $image_size_slug => $image_size_name ) {
        $available_image_sizes[] = array(
            'slug' => $image_size_slug,
            'name' => $image_size_name,
        );
    };

    $settings = array(
        '__unstableEnableFullSiteEditingBlocks' => gutenberg_is_fse_theme(),
        'disableCustomColors'                   => get_theme_support( 'disable-custom-colors' ),
        'disableCustomFontSizes'                => get_theme_support( 'disable-custom-font-sizes' ),
        'disableCustomGradients'                => get_theme_support( 'disable-custom-gradients' ),
        'enableCustomLineHeight'                => get_theme_support( 'custom-line-height' ),
        'enableCustomUnits'                     => get_theme_support( 'custom-units' ),
        'imageSizes'                            => $available_image_sizes,
        'isRTL'                                 => is_rtl(),
        'maxUploadFileSize'                     => $max_upload_size,
    );

    $color_palette = current( (array) get_theme_support( 'editor-color-palette' ) );
    if ( false !== $color_palette ) {
        $settings['colors'] = $color_palette;
    }

    $font_sizes = current( (array) get_theme_support( 'editor-font-sizes' ) );
    if ( false !== $font_sizes ) {
        $settings['fontSizes'] = $font_sizes;
    }

    $gradient_presets = current( (array) get_theme_support( 'editor-gradient-presets' ) );
    if ( false !== $gradient_presets ) {
        $settings['gradients'] = $gradient_presets;
    }

    return $settings;
}

/**
 * Extends the block editor with settings that are only in the plugin.
 *
 * @param array $settings Existing editor settings.
 *
 * @return array Filtered settings.
 */
function gutenberg_extend_post_editor_settings( $settings ) {
    $settings['__unstableEnableFullSiteEditingBlocks'] = gutenberg_is_fse_theme();
    return $settings;
}
add_filter( 'block_editor_settings', 'gutenberg_extend_post_editor_settings' );