<?php
/**
* Dependencies API: WP_Styles class
*
* @since 2.6.0
*
* @package WordPress
* @subpackage Dependencies
*/
/**
* Core class used to register styles.
*
* @since 2.6.0
*
* @see WP_Dependencies
*/
class WP_Styles extends WP_Dependencies {
/**
* Base URL for styles.
*
* Full URL with trailing slash.
*
* @since 2.6.0
* @see wp_default_styles()
* @var string|null
*/
public $base_url;
/**
* URL of the content directory.
*
* @since 2.8.0
* @see wp_default_styles()
* @var string|null
*/
public $content_url;
/**
* Default version string for stylesheets.
*
* @since 2.6.0
* @see wp_default_styles()
* @var string|null
*/
public $default_version;
/**
* The current text direction.
*
* @since 2.6.0
* @see wp_default_styles()
* @var string
*/
public $text_direction = 'ltr';
/**
* Holds a list of style handles which will be concatenated.
*
* @since 2.8.0
* @var string
*/
public $concat = '';
/**
* Holds a string which contains style handles and their version.
*
* @since 2.8.0
* @deprecated 3.4.0
* @var string
*/
public $concat_version = '';
/**
* Whether to perform concatenation.
*
* @since 2.8.0
* @var bool
*/
public $do_concat = false;
/**
* Holds HTML markup of styles and additional data if concatenation
* is enabled.
*
* @since 2.8.0
* @var string
*/
public $print_html = '';
/**
* Holds inline styles if concatenation is enabled.
*
* @since 3.3.0
* @var string
*/
public $print_code = '';
/**
* List of default directories.
*
* @since 2.8.0
* @see wp_default_styles()
* @var string[]|null
*/
public $default_dirs;
/**
* Constructor.
*
* @since 2.6.0
*/
public function __construct() {
/**
* Fires when the WP_Styles instance is initialized.
*
* @since 2.6.0
*
* @param WP_Styles $wp_styles WP_Styles instance (passed by reference).
*/
do_action_ref_array( 'wp_default_styles', array( &$this ) );
}
/**
* Processes a style dependency.
*
* @since 2.6.0
* @since 5.5.0 Added the `$group` parameter.
*
* @see WP_Dependencies::do_item()
*
* @param string $handle The style's registered handle.
* @param int|false $group Optional. Group level: level (int), no groups (false).
* Default false.
* @return bool True on success, false on failure.
*/
public function do_item( $handle, $group = false ) {
if ( ! parent::do_item( $handle ) ) {
return false;
}
$obj = $this->registered[ $handle ];
if ( $obj->extra['conditional'] ?? false ) {
return false;
}
if ( null === $obj->ver ) {
$ver = '';
} else {
$ver = $obj->ver ? $obj->ver : $this->default_version;
}
if ( isset( $this->args[ $handle ] ) ) {
$ver = $ver ? $ver . '&' . $this->args[ $handle ] : $this->args[ $handle ];
}
$src = $obj->src;
$inline_style = $this->print_inline_style( $handle, false );
if ( $inline_style ) {
$processor = new WP_HTML_Tag_Processor( '<style></style>' );
$processor->next_tag();
$processor->set_attribute( 'id', "{$handle}-inline-css" );
$processor->set_modifiable_text( "\n{$inline_style}\n" );
$inline_style_tag = "{$processor->get_updated_html()}\n";
} else {
$inline_style_tag = '';
}
if ( $this->do_concat ) {
if ( is_string( $src ) && $this->in_default_dir( $src ) && ! isset( $obj->extra['alt'] ) ) {
$this->concat .= "$handle,";
$this->concat_version .= "$handle$ver";
$this->print_code .= $inline_style;
return true;
}
}
$media = $obj->args ?? 'all';
// A single item may alias a set of items, by having dependencies, but no source.
if ( ! $src ) {
if ( $inline_style_tag ) {
if ( $this->do_concat ) {
$this->print_html .= $inline_style_tag;
} else {
echo $inline_style_tag;
}
}
return true;
}
$href = $this->_css_href( $src, $obj->ver, $handle );
if ( ! $href ) {
return true;
}
$rel = isset( $obj->extra['alt'] ) && $obj->extra['alt'] ? 'alternate stylesheet' : 'stylesheet';
$title = $obj->extra['title'] ?? '';
$tag = sprintf(
"<link rel='%s' id='%s-css'%s href='%s' media='%s' />\n",
$rel,
esc_attr( $handle ),
$title ? sprintf( " title='%s'", esc_attr( $title ) ) : '',
$href,
esc_attr( $media )
);
/**
* Filters the HTML link tag of an enqueued style.
*
* @since 2.6.0
* @since 4.3.0 Introduced the `$href` parameter.
* @since 4.5.0 Introduced the `$media` parameter.
*
* @param string $tag The link tag for the enqueued style.
* @param string $handle The style's registered handle.
* @param string $href The stylesheet's source URL.
* @param string $media The stylesheet's media attribute.
*/
$tag = apply_filters( 'style_loader_tag', $tag, $handle, $href, $media );
if ( 'rtl' === $this->text_direction && isset( $obj->extra['rtl'] ) && $obj->extra['rtl'] ) {
if ( is_bool( $obj->extra['rtl'] ) || 'replace' === $obj->extra['rtl'] ) {
$suffix = $obj->extra['suffix'] ?? '';
$rtl_href = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $this->_css_href( $src, $ver, "$handle-rtl" ) );
} else {
$rtl_href = $this->_css_href( $obj->extra['rtl'], $ver, "$handle-rtl" );
}
$rtl_tag = sprintf(
"<link rel='%s' id='%s-rtl-css'%s href='%s' media='%s' />\n",
$rel,
esc_attr( $handle ),
$title ? sprintf( " title='%s'", esc_attr( $title ) ) : '',
$rtl_href,
esc_attr( $media )
);
/** This filter is documented in wp-includes/class-wp-styles.php */
$rtl_tag = apply_filters( 'style_loader_tag', $rtl_tag, $handle, $rtl_href, $media );
if ( 'replace' === $obj->extra['rtl'] ) {
$tag = $rtl_tag;
} else {
$tag .= $rtl_tag;
}
}
if ( $this->do_concat ) {
$this->print_html .= $tag;
if ( $inline_style_tag ) {
$this->print_html .= $inline_style_tag;
}
} else {
echo $tag;
$this->print_inline_style( $handle );
}
return true;
}
/**
* Adds extra CSS styles to a registered stylesheet.
*
* @since 3.3.0
*
* @param string $handle The style's registered handle.
* @param string $code String containing the CSS styles to be added.
* @return bool True on success, false on failure.
*/
public function add_inline_style( $handle, $code ) {
if ( ! $code ) {
return false;
}
$after = $this->get_data( $handle, 'after' );
if ( ! $after ) {
$after = array();
}
$after[] = $code;
return $this->add_data( $handle, 'after', $after );
}
/**
* Prints extra CSS styles of a registered stylesheet.
*
* @since 3.3.0
*
* @param string $handle The style's registered handle.
* @param bool $display Optional. Whether to print the inline style
* instead of just returning it. Default true.
* @return string|bool False if no data exists, inline styles if `$display` is true,
* true otherwise.
*/
public function print_inline_style( $handle, $display = true ) {
$output = $this->get_data( $handle, 'after' );
if ( empty( $output ) || ! is_array( $output ) ) {
return false;
}
if ( ! $this->do_concat ) {
// Obtain the original `src` for a stylesheet possibly inlined by wp_maybe_inline_styles().
$inlined_src = $this->get_data( $handle, 'inlined_src' );
// If there's only one `after` inline style, and that inline style had been inlined, then use the $inlined_src
// as the sourceURL. Otherwise, if there is more than one inline `after` style associated with the handle,
// then resort to using the handle to construct the sourceURL since there isn't a single source.
if ( count( $output ) === 1 && is_string( $inlined_src ) && strlen( $inlined_src ) > 0 ) {
$source_url = esc_url_raw( $inlined_src );
} else {
$source_url = rawurlencode( "{$handle}-inline-css" );
}
$output[] = sprintf(
'/*# sourceURL=%s */',
$source_url
);
}
$output = implode( "\n", $output );
if ( ! $display ) {
return $output;
}
$processor = new WP_HTML_Tag_Processor( '<style></style>' );
$processor->next_tag();
$processor->set_attribute( 'id', "{$handle}-inline-css" );
$processor->set_modifiable_text( "\n{$output}\n" );
echo "{$processor->get_updated_html()}\n";
return true;
}
/**
* Overrides the add_data method from WP_Dependencies, to allow unsetting dependencies for conditional styles.
*
* @since 6.9.0
*
* @param string $handle Name of the item. Should be unique.
* @param string $key The data key.
* @param mixed $value The data value.
* @return bool True on success, false on failure.
*/
public function add_data( $handle, $key, $value ) {
if ( ! isset( $this->registered[ $handle ] ) ) {
return false;
}
if ( 'conditional' === $key ) {
$this->registered[ $handle ]->deps = array();
}
return parent::add_data( $handle, $key, $value );
}
/**
* Determines style dependencies.
*
* @since 2.6.0
*
* @see WP_Dependencies::all_deps()
*
* @param string|string[] $handles Item handle (string) or item handles (array of strings).
* @param bool $recursion Optional. Internal flag that function is calling itself.
* Default false.
* @param int|false $group Optional. Group level: level (int), no groups (false).
* Default false.
* @return bool True on success, false on failure.
*/
public function all_deps( $handles, $recursion = false, $group = false ) {
$result = parent::all_deps( $handles, $recursion, $group );
if ( ! $recursion ) {
/**
* Filters the array of enqueued styles before processing for output.
*
* @since 2.6.0
*
* @param string[] $to_do The list of enqueued style handles about to be processed.
*/
$this->to_do = apply_filters( 'print_styles_array', $this->to_do );
}
return $result;
}
/**
* Generates an enqueued style's fully-qualified URL.
*
* @since 2.6.0
*
* @param string $src The source of the enqueued style.
* @param string|false|null $ver The version of the enqueued style.
* @param string $handle The style's registered handle.
* @return string Style's fully-qualified URL.
*/
public function _css_href( $src, $ver, $handle ) {
if ( ! is_bool( $src ) && ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && str_starts_with( $src, $this->content_url ) ) ) {
$src = $this->base_url . $src;
}
$ver_to_add = '';
if ( empty( $ver ) && null !== $ver && is_string( $this->default_version ) ) {
$ver_to_add = $this->default_version;
} elseif ( is_scalar( $ver ) ) {
$ver_to_add = (string) $ver;
}
$added_args = (string) ( $this->args[ $handle ] ?? '' );
if ( '' !== $ver_to_add || '' !== $added_args ) {
$fragment = strstr( $src, '#' );
if ( false !== $fragment ) {
$src = substr( $src, 0, -strlen( $fragment ) );
}
if ( '' !== $ver_to_add ) {
$src .= ( str_contains( $src, '?' ) ? '&' : '?' ) . 'ver=' . rawurlencode( $ver_to_add );
}
if ( '' !== $added_args ) {
$src .= ( str_contains( $src, '?' ) ? '&' : '?' ) . $added_args;
}
if ( false !== $fragment ) {
$src .= $fragment;
}
}
/**
* Filters an enqueued style's fully-qualified URL.
*
* @since 2.6.0
*
* @param string $src The source URL of the enqueued style.
* @param string $handle The style's registered handle.
*/
$src = apply_filters( 'style_loader_src', $src, $handle );
return esc_url( $src );
}
/**
* Whether a handle's source is in a default directory.
*
* @since 2.8.0
*
* @param string $src The source of the enqueued style.
* @return bool True if found, false if not.
*/
public function in_default_dir( $src ) {
if ( ! $this->default_dirs ) {
return true;
}
return array_any( (array) $this->default_dirs, fn( $test ) => str_starts_with( $src, $test ) );
}
/**
* Processes items and dependencies for the footer group.
*
* HTML 5 allows styles in the body, grab late enqueued items and output them in the footer.
*
* @since 3.3.0
*
* @see WP_Dependencies::do_items()
*
* @return string[] Handles of items that have been processed.
*/
public function do_footer_items() {
$this->do_items( false, 1 );
return $this->done;
}
/**
* Resets class properties.
*
* @since 3.3.0
*/
public function reset() {
$this->do_concat = false;
$this->concat = '';
$this->concat_version = '';
$this->print_html = '';
}
/**
* Gets a style-specific dependency warning message.
*
* @since 6.9.1
*
* @param string $handle Style handle with missing dependencies.
* @param string[] $missing_dependency_handles Missing dependency handles.
* @return string Formatted, localized warning message.
*/
protected function get_dependency_warning_message( $handle, $missing_dependency_handles ) {
return sprintf(
/* translators: 1: Style handle, 2: List of missing dependency handles. */
__( 'The style with the handle "%1$s" was enqueued with dependencies that are not registered: %2$s.' ),
$handle,
implode( wp_get_list_item_separator(), $missing_dependency_handles )
);
}
}