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<?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
* @var string
*/
public $base_url;
/**
* URL of the content directory.
*
* @since 2.8.0
* @var string
*/
public $content_url;
/**
* Default version string for stylesheets.
*
* @since 2.6.0
* @var string
*/
public $default_version;
/**
* The current text direction.
*
* @since 2.6.0
* @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
* @var array
*/
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 $this WP_Styles instance (passed by reference).
*/
do_action_ref_array( 'wp_default_styles', array(&$this) );
}
/**
* Processes a style dependency.
*
* @since 2.6.0
*
* @see WP_Dependencies::do_item()
*
* @param string $handle The style's registered handle.
* @return bool True on success, false on failure.
*/
public function do_item( $handle ) {
if ( !parent::do_item($handle) )
return false;
$obj = $this->registered[$handle];
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];
if ( $this->do_concat ) {
if ( $this->in_default_dir($obj->src) && !isset($obj->extra['conditional']) && !isset($obj->extra['alt']) ) {
$this->concat .= "$handle,";
$this->concat_version .= "$handle$ver";
$this->print_code .= $this->print_inline_style( $handle, false );
return true;
}
}
if ( isset($obj->args) )
$media = esc_attr( $obj->args );
else
$media = 'all';
// A single item may alias a set of items, by having dependencies, but no source.
if ( ! $obj->src ) {
if ( $inline_style = $this->print_inline_style( $handle, false ) ) {
$inline_style = sprintf( "<style id='%s-inline-css' type='text/css'>\n%s\n</style>\n", esc_attr( $handle ), $inline_style );
if ( $this->do_concat ) {
$this->print_html .= $inline_style;
} else {
echo $inline_style;
}
}
return true;
}
$href = $this->_css_href( $obj->src, $ver, $handle );
if ( ! $href ) {
return true;
}
$rel = isset($obj->extra['alt']) && $obj->extra['alt'] ? 'alternate stylesheet' : 'stylesheet';
$title = isset($obj->extra['title']) ? "title='" . esc_attr( $obj->extra['title'] ) . "'" : '';
/**
* Filters the HTML link tag of an enqueued style.
*
* @since 2.6.0
* @since 4.3.0 Introduced the `$href` parameter.
* @since 4.5.0 Introduced the `$media` parameter.
*
* @param string $html 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.
*/
$tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-css' $title href='$href' type='text/css' media='$media' />\n", $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 = isset( $obj->extra['suffix'] ) ? $obj->extra['suffix'] : '';
$rtl_href = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $this->_css_href( $obj->src , $ver, "$handle-rtl" ));
} else {
$rtl_href = $this->_css_href( $obj->extra['rtl'], $ver, "$handle-rtl" );
}
/** This filter is documented in wp-includes/class.wp-styles.php */
$rtl_tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-rtl-css' $title href='$rtl_href' type='text/css' media='$media' />\n", $handle, $rtl_href, $media );
if ( $obj->extra['rtl'] === 'replace' ) {
$tag = $rtl_tag;
} else {
$tag .= $rtl_tag;
}
}
$conditional_pre = $conditional_post = '';
if ( isset( $obj->extra['conditional'] ) && $obj->extra['conditional'] ) {
$conditional_pre = "<!--[if {$obj->extra['conditional']}]>\n";
$conditional_post = "<![endif]-->\n";
}
if ( $this->do_concat ) {
$this->print_html .= $conditional_pre;
$this->print_html .= $tag;
if ( $inline_style = $this->print_inline_style( $handle, false ) ) {
$this->print_html .= sprintf( "<style id='%s-inline-css' type='text/css'>\n%s\n</style>\n", esc_attr( $handle ), $inline_style );
}
$this->print_html .= $conditional_post;
} else {
echo $conditional_pre;
echo $tag;
$this->print_inline_style( $handle );
echo $conditional_post;
}
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 $echo Optional. Whether to echo the inline style instead of just returning it.
* Default true.
* @return string|bool False if no data exists, inline styles if `$echo` is true, true otherwise.
*/
public function print_inline_style( $handle, $echo = true ) {
$output = $this->get_data( $handle, 'after' );
if ( empty( $output ) ) {
return false;
}
$output = implode( "\n", $output );
if ( ! $echo ) {
return $output;
}
printf( "<style id='%s-inline-css' type='text/css'>\n%s\n</style>\n", esc_attr( $handle ), $output );
return true;
}
/**
* Determines style dependencies.
*
* @since 2.6.0
*
* @see WP_Dependencies::all_deps()
*
* @param mixed $handles Item handle and argument (string) or item handles and arguments (array of strings).
* @param bool $recursion Internal flag that function is calling itself.
* @param int|false $group Group level: (int) level, (false) no groups.
* @return bool True on success, false on failure.
*/
public function all_deps( $handles, $recursion = false, $group = false ) {
$r = parent::all_deps( $handles, $recursion, $group );
if ( ! $recursion ) {
/**
* Filters the array of enqueued styles before processing for output.
*
* @since 2.6.0
*
* @param array $to_do The list of enqueued styles about to be processed.
*/
$this->to_do = apply_filters( 'print_styles_array', $this->to_do );
}
return $r;
}
/**
* Generates an enqueued style's fully-qualified URL.
*
* @since 2.6.0
*
* @param string $src The source of the enqueued style.
* @param string $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) && ! ( $this->content_url && 0 === strpos($src, $this->content_url) ) ) {
$src = $this->base_url . $src;
}
if ( !empty($ver) )
$src = add_query_arg('ver', $ver, $src);
/**
* 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;
foreach ( (array) $this->default_dirs as $test ) {
if ( 0 === strpos($src, $test) )
return true;
}
return false;
}
/**
* 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 array 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 = '';
}
}