WordPress/wp-admin/includes/class-custom-background.php

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<?php
/**
* The custom background script.
*
* @package WordPress
* @subpackage Administration
*/
/**
* The custom background class.
*
* @since 3.0.0
*/
Code Modernization: Add `AllowDynamicProperties` attribute to all (parent) classes. Dynamic (non-explicitly declared) properties are deprecated as of PHP 8.2 and are expected to become a fatal error in PHP 9.0. There are a number of ways to mitigate this: * If it is an accidental typo for a declared property: fix the typo. * For known properties: declare them on the class. * For unknown properties: add the magic `__get()`, `__set()`, et al. methods to the class or let the class extend `stdClass` which has highly optimized versions of these magic methods built in. * For unknown ''use'' of dynamic properties, the `#[AllowDynamicProperties]` attribute can be added to the class. The attribute will automatically be inherited by child classes. Trac ticket #56034 is open to investigate and handle the third and fourth type of situations, however it has become clear this will need more time and will not be ready in time for WP 6.1. To reduce “noise” in the meantime, both in the error logs of WP users moving onto PHP 8.2, in the test run logs of WP itself, in test runs of plugins and themes, as well as to prevent duplicate tickets from being opened for the same issue, this commit adds the `#[AllowDynamicProperties]` attribute to all “parent” classes in WP. The logic used for this commit is as follows: * If a class already has the attribute: no action needed. * If a class does not `extend`: add the attribute. * If a class does `extend`: - If it extends `stdClass`: no action needed (as `stdClass` supports dynamic properties). - If it extends a PHP native class: add the attribute. - If it extends a class from one of WP's external dependencies: add the attribute. * In all other cases: no action — the attribute should not be needed as child classes inherit from the parent. Whether or not a class contains magic methods has not been taken into account, as a review of the currently existing magic methods has shown that those are generally not sturdy enough and often even set dynamic properties (which they should not). See the [https://www.youtube.com/watch?v=vDZWepDQQVE live stream from August 16, 2022] for more details. This commit only affects classes in the `src` directory of WordPress core. * Tests should not get this attribute, but should be fixed to not use dynamic properties instead. Patches for this are already being committed under ticket #56033. * While a number bundled themes (2014, 2019, 2020, 2021) contain classes, they are not a part of this commit and may be updated separately. Reference: [https://wiki.php.net/rfc/deprecate_dynamic_properties PHP RFC: Deprecate dynamic properties]. Follow-up to [53922]. Props jrf, hellofromTonya, markjaquith, peterwilsoncc, costdev, knutsp, aristath. See #56513, #56034. Built from https://develop.svn.wordpress.org/trunk@54133 git-svn-id: http://core.svn.wordpress.org/trunk@53692 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2022-09-12 11:47:14 -04:00
#[AllowDynamicProperties]
class Custom_Background {
/**
* Callback for administration header.
*
* @var callable
* @since 3.0.0
*/
public $admin_header_callback;
/**
* Callback for header div.
*
* @var callable
* @since 3.0.0
*/
public $admin_image_div_callback;
/**
* Used to trigger a success message when settings updated and set to true.
*
* @since 3.0.0
* @var bool
*/
private $updated;
/**
* Constructor - Registers administration header callback.
*
* @since 3.0.0
* @param callable $admin_header_callback
* @param callable $admin_image_div_callback Optional custom image div output callback.
*/
public function __construct( $admin_header_callback = '', $admin_image_div_callback = '' ) {
$this->admin_header_callback = $admin_header_callback;
$this->admin_image_div_callback = $admin_image_div_callback;
add_action( 'admin_menu', array( $this, 'init' ) );
add_action( 'wp_ajax_custom-background-add', array( $this, 'ajax_background_add' ) );
// Unused since 3.5.0.
add_action( 'wp_ajax_set-background-image', array( $this, 'wp_set_background_image' ) );
}
/**
* Sets up the hooks for the Custom Background admin page.
*
* @since 3.0.0
*/
public function init() {
$page = add_theme_page( __( 'Background' ), __( 'Background' ), 'edit_theme_options', 'custom-background', array( $this, 'admin_page' ) );
if ( ! $page ) {
return;
}
add_action( "load-{$page}", array( $this, 'admin_load' ) );
add_action( "load-{$page}", array( $this, 'take_action' ), 49 );
add_action( "load-{$page}", array( $this, 'handle_upload' ), 49 );
if ( $this->admin_header_callback ) {
add_action( "admin_head-{$page}", $this->admin_header_callback, 51 );
}
}
/**
* Sets up the enqueue for the CSS & JavaScript files.
*
* @since 3.0.0
*/
public function admin_load() {
get_current_screen()->add_help_tab(
array(
'id' => 'overview',
'title' => __( 'Overview' ),
'content' =>
'<p>' . __( 'You can customize the look of your site without touching any of your theme&#8217;s code by using a custom background. Your background can be an image or a color.' ) . '</p>' .
'<p>' . __( 'To use a background image, simply upload it or choose an image that has already been uploaded to your Media Library by clicking the &#8220;Choose Image&#8221; button. You can display a single instance of your image, or tile it to fill the screen. You can have your background fixed in place, so your site content moves on top of it, or you can have it scroll with your site.' ) . '</p>' .
'<p>' . __( 'You can also choose a background color by clicking the Select Color button and either typing in a legitimate HTML hex value, e.g. &#8220;#ff0000&#8221; for red, or by choosing a color using the color picker.' ) . '</p>' .
'<p>' . __( 'Do not forget to click on the Save Changes button when you are finished.' ) . '</p>',
)
);
get_current_screen()->set_help_sidebar(
'<p><strong>' . __( 'For more information:' ) . '</strong></p>' .
'<p>' . __( '<a href="https://codex.wordpress.org/Appearance_Background_Screen">Documentation on Custom Background</a>' ) . '</p>' .
'<p>' . __( '<a href="https://wordpress.org/support/forums/">Support forums</a>' ) . '</p>'
);
wp_enqueue_media();
wp_enqueue_script( 'custom-background' );
wp_enqueue_style( 'wp-color-picker' );
}
/**
* Executes custom background modification.
*
* @since 3.0.0
*/
public function take_action() {
if ( empty( $_POST ) ) {
return;
}
if ( isset( $_POST['reset-background'] ) ) {
check_admin_referer( 'custom-background-reset', '_wpnonce-custom-background-reset' );
remove_theme_mod( 'background_image' );
remove_theme_mod( 'background_image_thumb' );
$this->updated = true;
return;
}
if ( isset( $_POST['remove-background'] ) ) {
// @todo Uploaded files are not removed here.
check_admin_referer( 'custom-background-remove', '_wpnonce-custom-background-remove' );
set_theme_mod( 'background_image', '' );
set_theme_mod( 'background_image_thumb', '' );
$this->updated = true;
wp_safe_redirect( $_POST['_wp_http_referer'] );
return;
}
if ( isset( $_POST['background-preset'] ) ) {
check_admin_referer( 'custom-background' );
if ( in_array( $_POST['background-preset'], array( 'default', 'fill', 'fit', 'repeat', 'custom' ), true ) ) {
$preset = $_POST['background-preset'];
} else {
$preset = 'default';
}
set_theme_mod( 'background_preset', $preset );
}
if ( isset( $_POST['background-position'] ) ) {
check_admin_referer( 'custom-background' );
$position = explode( ' ', $_POST['background-position'] );
if ( in_array( $position[0], array( 'left', 'center', 'right' ), true ) ) {
$position_x = $position[0];
} else {
$position_x = 'left';
}
if ( in_array( $position[1], array( 'top', 'center', 'bottom' ), true ) ) {
$position_y = $position[1];
} else {
$position_y = 'top';
}
set_theme_mod( 'background_position_x', $position_x );
set_theme_mod( 'background_position_y', $position_y );
}
if ( isset( $_POST['background-size'] ) ) {
check_admin_referer( 'custom-background' );
if ( in_array( $_POST['background-size'], array( 'auto', 'contain', 'cover' ), true ) ) {
$size = $_POST['background-size'];
} else {
$size = 'auto';
}
set_theme_mod( 'background_size', $size );
}
if ( isset( $_POST['background-repeat'] ) ) {
check_admin_referer( 'custom-background' );
$repeat = $_POST['background-repeat'];
if ( 'no-repeat' !== $repeat ) {
$repeat = 'repeat';
}
set_theme_mod( 'background_repeat', $repeat );
}
if ( isset( $_POST['background-attachment'] ) ) {
check_admin_referer( 'custom-background' );
$attachment = $_POST['background-attachment'];
if ( 'fixed' !== $attachment ) {
$attachment = 'scroll';
}
set_theme_mod( 'background_attachment', $attachment );
}
if ( isset( $_POST['background-color'] ) ) {
check_admin_referer( 'custom-background' );
$color = preg_replace( '/[^0-9a-fA-F]/', '', $_POST['background-color'] );
if ( strlen( $color ) === 6 || strlen( $color ) === 3 ) {
set_theme_mod( 'background_color', $color );
} else {
set_theme_mod( 'background_color', '' );
}
}
$this->updated = true;
}
/**
* Displays the custom background page.
*
* @since 3.0.0
*/
public function admin_page() {
?>
<div class="wrap" id="custom-background">
<h1><?php _e( 'Custom Background' ); ?></h1>
<?php if ( current_user_can( 'customize' ) ) { ?>
<div class="notice notice-info hide-if-no-customize">
<p>
<?php
printf(
/* translators: %s: URL to background image configuration in Customizer. */
__( 'You can now manage and live-preview Custom Backgrounds in the <a href="%s">Customizer</a>.' ),
admin_url( 'customize.php?autofocus[control]=background_image' )
);
?>
</p>
</div>
<?php } ?>
<?php if ( ! empty( $this->updated ) ) { ?>
<div id="message" class="updated">
<p>
<?php
/* translators: %s: Home URL. */
printf( __( 'Background updated. <a href="%s">Visit your site</a> to see how it looks.' ), esc_url( home_url( '/' ) ) );
?>
</p>
</div>
<?php } ?>
<h2><?php _e( 'Background Image' ); ?></h2>
<table class="form-table" role="presentation">
<tbody>
<tr>
<th scope="row"><?php _e( 'Preview' ); ?></th>
<td>
<?php
if ( $this->admin_image_div_callback ) {
call_user_func( $this->admin_image_div_callback );
} else {
$background_styles = '';
$bgcolor = get_background_color();
if ( $bgcolor ) {
$background_styles .= 'background-color: #' . $bgcolor . ';';
}
$background_image_thumb = get_background_image();
if ( $background_image_thumb ) {
$background_image_thumb = esc_url( set_url_scheme( get_theme_mod( 'background_image_thumb', str_replace( '%', '%%', $background_image_thumb ) ) ) );
$background_position_x = get_theme_mod( 'background_position_x', get_theme_support( 'custom-background', 'default-position-x' ) );
$background_position_y = get_theme_mod( 'background_position_y', get_theme_support( 'custom-background', 'default-position-y' ) );
$background_size = get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) );
$background_repeat = get_theme_mod( 'background_repeat', get_theme_support( 'custom-background', 'default-repeat' ) );
$background_attachment = get_theme_mod( 'background_attachment', get_theme_support( 'custom-background', 'default-attachment' ) );
// Background-image URL must be single quote, see below.
$background_styles .= " background-image: url('$background_image_thumb');"
. " background-size: $background_size;"
. " background-position: $background_position_x $background_position_y;"
. " background-repeat: $background_repeat;"
. " background-attachment: $background_attachment;";
}
?>
<div id="custom-background-image" style="<?php echo $background_styles; ?>"><?php // Must be double quote, see above. ?>
<?php if ( $background_image_thumb ) { ?>
<img class="custom-background-image" src="<?php echo $background_image_thumb; ?>" style="visibility:hidden;" alt="" /><br />
<img class="custom-background-image" src="<?php echo $background_image_thumb; ?>" style="visibility:hidden;" alt="" />
<?php } ?>
</div>
<?php } ?>
</td>
</tr>
<?php if ( get_background_image() ) : ?>
<tr>
<th scope="row"><?php _e( 'Remove Image' ); ?></th>
<td>
<form method="post">
<?php wp_nonce_field( 'custom-background-remove', '_wpnonce-custom-background-remove' ); ?>
<?php submit_button( __( 'Remove Background Image' ), '', 'remove-background', false ); ?><br />
<?php _e( 'This will remove the background image. You will not be able to restore any customizations.' ); ?>
</form>
</td>
</tr>
<?php endif; ?>
<?php $default_image = get_theme_support( 'custom-background', 'default-image' ); ?>
<?php if ( $default_image && get_background_image() !== $default_image ) : ?>
<tr>
<th scope="row"><?php _e( 'Restore Original Image' ); ?></th>
<td>
<form method="post">
<?php wp_nonce_field( 'custom-background-reset', '_wpnonce-custom-background-reset' ); ?>
<?php submit_button( __( 'Restore Original Image' ), '', 'reset-background', false ); ?><br />
<?php _e( 'This will restore the original background image. You will not be able to restore any customizations.' ); ?>
</form>
</td>
</tr>
<?php endif; ?>
<?php if ( current_user_can( 'upload_files' ) ) : ?>
<tr>
<th scope="row"><?php _e( 'Select Image' ); ?></th>
<td><form enctype="multipart/form-data" id="upload-form" class="wp-upload-form" method="post">
<p>
<label for="upload"><?php _e( 'Choose an image from your computer:' ); ?></label><br />
<input type="file" id="upload" name="import" />
<input type="hidden" name="action" value="save" />
<?php wp_nonce_field( 'custom-background-upload', '_wpnonce-custom-background-upload' ); ?>
<?php submit_button( __( 'Upload' ), '', 'submit', false ); ?>
</p>
<p>
<label for="choose-from-library-link"><?php _e( 'Or choose an image from your media library:' ); ?></label><br />
<button id="choose-from-library-link" class="button"
data-choose="<?php esc_attr_e( 'Choose a Background Image' ); ?>"
data-update="<?php esc_attr_e( 'Set as background' ); ?>"><?php _e( 'Choose Image' ); ?></button>
</p>
</form>
</td>
</tr>
<?php endif; ?>
</tbody>
</table>
<h2><?php _e( 'Display Options' ); ?></h2>
<form method="post">
<table class="form-table" role="presentation">
<tbody>
<?php if ( get_background_image() ) : ?>
<input name="background-preset" type="hidden" value="custom">
<?php
$background_position = sprintf(
'%s %s',
get_theme_mod( 'background_position_x', get_theme_support( 'custom-background', 'default-position-x' ) ),
get_theme_mod( 'background_position_y', get_theme_support( 'custom-background', 'default-position-y' ) )
);
$background_position_options = array(
array(
'left top' => array(
'label' => __( 'Top Left' ),
'icon' => 'dashicons dashicons-arrow-left-alt',
),
'center top' => array(
'label' => __( 'Top' ),
'icon' => 'dashicons dashicons-arrow-up-alt',
),
'right top' => array(
'label' => __( 'Top Right' ),
'icon' => 'dashicons dashicons-arrow-right-alt',
),
),
array(
'left center' => array(
'label' => __( 'Left' ),
'icon' => 'dashicons dashicons-arrow-left-alt',
),
'center center' => array(
'label' => __( 'Center' ),
'icon' => 'background-position-center-icon',
),
'right center' => array(
'label' => __( 'Right' ),
'icon' => 'dashicons dashicons-arrow-right-alt',
),
),
array(
'left bottom' => array(
'label' => __( 'Bottom Left' ),
'icon' => 'dashicons dashicons-arrow-left-alt',
),
'center bottom' => array(
'label' => __( 'Bottom' ),
'icon' => 'dashicons dashicons-arrow-down-alt',
),
'right bottom' => array(
'label' => __( 'Bottom Right' ),
'icon' => 'dashicons dashicons-arrow-right-alt',
),
),
);
?>
<tr>
<th scope="row"><?php _e( 'Image Position' ); ?></th>
<td><fieldset><legend class="screen-reader-text"><span>
<?php
/* translators: Hidden accessibility text. */
_e( 'Image Position' );
?>
</span></legend>
<div class="background-position-control">
<?php foreach ( $background_position_options as $group ) : ?>
<div class="button-group">
<?php foreach ( $group as $value => $input ) : ?>
<label>
<input class="ui-helper-hidden-accessible" name="background-position" type="radio" value="<?php echo esc_attr( $value ); ?>"<?php checked( $value, $background_position ); ?>>
<span class="button display-options position"><span class="<?php echo esc_attr( $input['icon'] ); ?>" aria-hidden="true"></span></span>
<span class="screen-reader-text"><?php echo $input['label']; ?></span>
</label>
<?php endforeach; ?>
</div>
<?php endforeach; ?>
</div>
</fieldset></td>
</tr>
<tr>
<th scope="row"><label for="background-size"><?php _e( 'Image Size' ); ?></label></th>
<td><fieldset><legend class="screen-reader-text"><span>
<?php
/* translators: Hidden accessibility text. */
_e( 'Image Size' );
?>
</span></legend>
<select id="background-size" name="background-size">
<option value="auto"<?php selected( 'auto', get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) ) ); ?>><?php _ex( 'Original', 'Original Size' ); ?></option>
<option value="contain"<?php selected( 'contain', get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) ) ); ?>><?php _e( 'Fit to Screen' ); ?></option>
<option value="cover"<?php selected( 'cover', get_theme_mod( 'background_size', get_theme_support( 'custom-background', 'default-size' ) ) ); ?>><?php _e( 'Fill Screen' ); ?></option>
</select>
</fieldset></td>
</tr>
<tr>
<th scope="row"><?php _ex( 'Repeat', 'Background Repeat' ); ?></th>
<td><fieldset><legend class="screen-reader-text"><span>
<?php
/* translators: Hidden accessibility text. */
_ex( 'Repeat', 'Background Repeat' );
?>
</span></legend>
<input name="background-repeat" type="hidden" value="no-repeat">
<label><input type="checkbox" name="background-repeat" value="repeat"<?php checked( 'repeat', get_theme_mod( 'background_repeat', get_theme_support( 'custom-background', 'default-repeat' ) ) ); ?>> <?php _e( 'Repeat Background Image' ); ?></label>
</fieldset></td>
</tr>
<tr>
<th scope="row"><?php _ex( 'Scroll', 'Background Scroll' ); ?></th>
<td><fieldset><legend class="screen-reader-text"><span>
<?php
/* translators: Hidden accessibility text. */
_ex( 'Scroll', 'Background Scroll' );
?>
</span></legend>
<input name="background-attachment" type="hidden" value="fixed">
<label><input name="background-attachment" type="checkbox" value="scroll" <?php checked( 'scroll', get_theme_mod( 'background_attachment', get_theme_support( 'custom-background', 'default-attachment' ) ) ); ?>> <?php _e( 'Scroll with Page' ); ?></label>
</fieldset></td>
</tr>
<?php endif; // get_background_image() ?>
<tr>
<th scope="row"><?php _e( 'Background Color' ); ?></th>
<td><fieldset><legend class="screen-reader-text"><span>
<?php
/* translators: Hidden accessibility text. */
_e( 'Background Color' );
?>
</span></legend>
<?php
$default_color = '';
if ( current_theme_supports( 'custom-background', 'default-color' ) ) {
$default_color = ' data-default-color="#' . esc_attr( get_theme_support( 'custom-background', 'default-color' ) ) . '"';
}
?>
<input type="text" name="background-color" id="background-color" value="#<?php echo esc_attr( get_background_color() ); ?>"<?php echo $default_color; ?>>
</fieldset></td>
</tr>
</tbody>
</table>
<?php wp_nonce_field( 'custom-background' ); ?>
<?php submit_button( null, 'primary', 'save-background-options' ); ?>
</form>
</div>
<?php
}
/**
* Handles an Image upload for the background image.
*
* @since 3.0.0
*/
public function handle_upload() {
if ( empty( $_FILES ) ) {
return;
}
check_admin_referer( 'custom-background-upload', '_wpnonce-custom-background-upload' );
$overrides = array( 'test_form' => false );
$uploaded_file = $_FILES['import'];
$wp_filetype = wp_check_filetype_and_ext( $uploaded_file['tmp_name'], $uploaded_file['name'] );
if ( ! wp_match_mime_types( 'image', $wp_filetype['type'] ) ) {
wp_die( __( 'The uploaded file is not a valid image. Please try again.' ) );
}
$file = wp_handle_upload( $uploaded_file, $overrides );
if ( isset( $file['error'] ) ) {
wp_die( $file['error'] );
}
$url = $file['url'];
$type = $file['type'];
$file = $file['file'];
$filename = wp_basename( $file );
// Construct the attachment array.
$attachment = array(
'post_title' => $filename,
'post_content' => $url,
'post_mime_type' => $type,
'guid' => $url,
'context' => 'custom-background',
);
// Save the data.
$id = wp_insert_attachment( $attachment, $file );
// Add the metadata.
wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $file ) );
update_post_meta( $id, '_wp_attachment_is_custom_background', get_option( 'stylesheet' ) );
set_theme_mod( 'background_image', sanitize_url( $url ) );
$thumbnail = wp_get_attachment_image_src( $id, 'thumbnail' );
set_theme_mod( 'background_image_thumb', sanitize_url( $thumbnail[0] ) );
/** This action is documented in wp-admin/includes/class-custom-image-header.php */
do_action( 'wp_create_file_in_uploads', $file, $id ); // For replication.
$this->updated = true;
}
/**
* Handles Ajax request for adding custom background context to an attachment.
*
* Triggers when the user adds a new background image from the
* Media Manager.
*
* @since 4.1.0
*/
public function ajax_background_add() {
check_ajax_referer( 'background-add', 'nonce' );
if ( ! current_user_can( 'edit_theme_options' ) ) {
wp_send_json_error();
}
$attachment_id = absint( $_POST['attachment_id'] );
if ( $attachment_id < 1 ) {
wp_send_json_error();
}
update_post_meta( $attachment_id, '_wp_attachment_is_custom_background', get_stylesheet() );
wp_send_json_success();
}
/**
* @since 3.4.0
* @deprecated 3.5.0
*
* @param array $form_fields
* @return array $form_fields
*/
public function attachment_fields_to_edit( $form_fields ) {
return $form_fields;
}
/**
* @since 3.4.0
* @deprecated 3.5.0
*
* @param array $tabs
* @return array $tabs
*/
public function filter_upload_tabs( $tabs ) {
return $tabs;
}
/**
* @since 3.4.0
* @deprecated 3.5.0
*/
public function wp_set_background_image() {
check_ajax_referer( 'custom-background' );
if ( ! current_user_can( 'edit_theme_options' ) || ! isset( $_POST['attachment_id'] ) ) {
exit;
}
$attachment_id = absint( $_POST['attachment_id'] );
$sizes = array_keys(
/** This filter is documented in wp-admin/includes/media.php */
apply_filters(
'image_size_names_choose',
array(
'thumbnail' => __( 'Thumbnail' ),
'medium' => __( 'Medium' ),
'large' => __( 'Large' ),
'full' => __( 'Full Size' ),
)
)
);
$size = 'thumbnail';
if ( in_array( $_POST['size'], $sizes, true ) ) {
$size = esc_attr( $_POST['size'] );
}
update_post_meta( $attachment_id, '_wp_attachment_is_custom_background', get_option( 'stylesheet' ) );
$url = wp_get_attachment_image_src( $attachment_id, $size );
$thumbnail = wp_get_attachment_image_src( $attachment_id, 'thumbnail' );
set_theme_mod( 'background_image', sanitize_url( $url[0] ) );
set_theme_mod( 'background_image_thumb', sanitize_url( $thumbnail[0] ) );
exit;
}
}