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<?php |
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|
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require_once __DIR__ . '/dependency-path-mapping.php'; |
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require_once __DIR__ . '/utils.php'; |
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|
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if ( ! defined( 'ALLOW_GZIP_COMPRESSION' ) ) { |
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define( 'ALLOW_GZIP_COMPRESSION', true ); |
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} |
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|
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class Page_Optimize_CSS_Concat extends WP_Styles { |
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private $dependency_path_mapping; |
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private $old_styles; |
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|
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public $allow_gzip_compression; |
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|
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function __construct( $styles ) { |
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if ( empty( $styles ) || ! ( $styles instanceof WP_Styles ) ) { |
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$this->old_styles = new WP_Styles(); |
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} else { |
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$this->old_styles = $styles; |
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} |
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|
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// Unset all the object properties except our private copy of the styles object. |
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// We have to unset everything so that the overload methods talk to $this->old_styles->whatever |
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// instead of $this->whatever. |
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foreach ( array_keys( get_object_vars( $this ) ) as $key ) { |
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if ( 'old_styles' === $key ) { |
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continue; |
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} |
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unset( $this->$key ); |
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} |
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|
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$this->dependency_path_mapping = new Page_Optimize_Dependency_Path_Mapping( |
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apply_filters( 'page_optimize_site_url', $this->base_url ) |
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); |
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} |
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|
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protected function has_inline_style( $handle ) { |
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$after_output = $this->get_data( $handle, 'after' ); |
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if ( ! empty( $after_output ) ) { |
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return true; |
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} |
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|
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return false; |
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} |
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|
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protected function css_has_import( $path ) { |
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static $cache = array(); |
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|
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if ( empty( $path ) ) { |
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return false; |
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} |
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|
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$key = $path; |
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|
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if ( array_key_exists( $key, $cache ) ) { |
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return $cache[ $key ]; |
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} |
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|
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$fh = @fopen( $path, 'rb' ); |
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if ( ! $fh ) { |
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$cache[ $key ] = false; |
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return false; |
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} |
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|
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$found = false; |
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$tail = ''; |
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|
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// Scan in chunks to keep memory bounded for large stylesheets. |
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while ( ! feof( $fh ) ) { |
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$chunk = fread( $fh, 32768 ); |
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if ( false === $chunk || '' === $chunk ) { |
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break; |
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} |
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|
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$haystack = $tail . $chunk; |
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if ( false !== stripos( $haystack, '@import' ) ) { |
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$found = true; |
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break; |
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} |
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|
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// Keep a short overlap so "@import" across chunk boundaries isn't missed. |
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$tail = substr( $haystack, -7 ); |
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} |
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|
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fclose( $fh ); |
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|
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$cache[ $key ] = $found; |
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return $found; |
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} |
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|
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function do_items( $handles = false, $group = false ) { |
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$handles = false === $handles ? $this->queue : (array) $handles; |
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$stylesheets = array(); |
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$siteurl = apply_filters( 'page_optimize_site_url', $this->base_url ); |
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|
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$this->all_deps( $handles ); |
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|
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$concat_group = null; |
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|
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foreach ( $this->to_do as $key => $handle ) { |
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$css_realpath = null; |
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// 1a. Skip invalid dependencies. |
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if ( ! isset( $this->registered[ $handle ] ) ) { |
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unset( $this->to_do[ $key ] ); |
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continue; |
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} |
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|
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$obj = $this->registered[ $handle ]; |
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|
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// 1b. Skip virtual (src-less) dependencies. |
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if ( empty( $obj->src ) ) { |
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if ( null !== $concat_group ) { |
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$stylesheets[] = $concat_group; |
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$concat_group = null; |
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} |
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|
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$stylesheets[] = array( |
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'type' => 'do_item', |
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'handle' => $handle, |
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); |
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unset( $this->to_do[ $key ] ); |
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continue; |
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} |
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|
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$obj->src = apply_filters( 'style_loader_src', $obj->src, $obj->handle ); |
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|
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// Core is kind of broken and returns "true" for src of "colors" handle |
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// http://core.trac.wordpress.org/attachment/ticket/16827/colors-hacked-fixed.diff |
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// http://core.trac.wordpress.org/ticket/20729 |
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$css_url = $obj->src; |
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if ( 'colors' == $obj->handle && true === $css_url ) { |
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$css_url = wp_style_loader_src( $css_url, $obj->handle ); |
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} |
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|
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$css_url_parsed = parse_url( $css_url ); |
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$css_path = ( is_array( $css_url_parsed ) && isset( $css_url_parsed['path'] ) ) ? $css_url_parsed['path'] : ''; |
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$extra = $obj->extra; |
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|
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// 2. Determine if this stylesheet can be concatenated. |
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|
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// Don't concat by default |
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$do_concat = false; |
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|
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// Only try to concat static css files |
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if ( $css_path && false !== strpos( $css_path, '.css' ) ) { |
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$do_concat = true; |
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} else { |
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if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { |
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echo sprintf( "\n<!-- No Concat CSS %s => Maybe Not Static File %s -->\n", esc_html( $handle ), esc_html( $obj->src ) ); |
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} |
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} |
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|
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// Don't try to concat styles which are loaded conditionally (like IE stuff) |
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if ( isset( $extra['conditional'] ) ) { |
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if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { |
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echo sprintf( "\n<!-- No Concat CSS %s => Has Conditional -->\n", esc_html( $handle ) ); |
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} |
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$do_concat = false; |
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} |
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|
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// Don't concat rtl stuff for now until concat supports it correctly |
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if ( $do_concat && 'rtl' === $this->text_direction && ! empty( $extra['rtl'] ) ) { |
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if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { |
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echo sprintf( "\n<!-- No Concat CSS %s => Is RTL -->\n", esc_html( $handle ) ); |
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} |
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$do_concat = false; |
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} |
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|
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// Don't try to concat externally hosted scripts |
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$is_internal_uri = $this->dependency_path_mapping->is_internal_uri( $css_url ); |
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if ( $do_concat && ! $is_internal_uri ) { |
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if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { |
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echo sprintf( "\n<!-- No Concat CSS %s => External URL: %s -->\n", esc_html( $handle ), esc_url( $css_url ) ); |
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} |
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$do_concat = false; |
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} |
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|
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if ( $do_concat ) { |
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// Resolve paths and concat styles that exist in the filesystem |
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$css_realpath = $this->dependency_path_mapping->dependency_src_to_fs_path( $css_url ); |
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if ( false === $css_realpath ) { |
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if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { |
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echo sprintf( "\n<!-- No Concat CSS %s => Invalid Path %s -->\n", esc_html( $handle ), esc_html( $css_realpath ) ); |
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} |
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$do_concat = false; |
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} |
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} |
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|
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// Skip concating CSS from exclusion list |
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$exclude_list = page_optimize_css_exclude_list(); |
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foreach ( $exclude_list as $exclude ) { |
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if ( $do_concat && $handle === $exclude ) { |
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$do_concat = false; |
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if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { |
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echo sprintf( "\n<!-- No Concat CSS %s => Excluded option -->\n", esc_html( $handle ) ); |
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} |
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} |
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} |
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|
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// Allow plugins to disable concatenation of certain stylesheets. |
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$filtered_concat = apply_filters( 'css_do_concat', $do_concat, $handle ); |
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if ( $do_concat && ! $filtered_concat ) { |
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if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { |
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echo sprintf( "\n<!-- No Concat CSS %s => Filtered `false` -->\n", esc_html( $handle ) ); |
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} |
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} |
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$do_concat = $filtered_concat; |
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|
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/** |
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* 3. Add to the stylesheets output list. |
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* |
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* We keep a running $concat_group that accumulates consecutive concat-eligible styles |
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* sharing the same media type. The group is finalized and appended to $stylesheets when: |
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* - A non-concat style appears |
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* - The media type changes |
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* - An inline style is attached to the current style |
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* This makes sure output order matches registration order. |
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**/ |
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if ( true === $do_concat ) { |
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$media = $obj->args; |
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if ( empty( $media ) ) { |
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$media = 'all'; |
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} |
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|
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// Media type changed - finish the current group. |
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if ( null !== $concat_group && $concat_group['media'] !== $media ) { |
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$stylesheets[] = $concat_group; |
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$concat_group = null; |
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} |
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|
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// If a non-first stylesheet in a group contains @import, the concat service hoists it, |
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// reordering CSS. Split groups so @import stylesheets are always first in their group. |
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if ( |
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null !== $concat_group |
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&& ! empty( $css_realpath ) |
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&& $this->css_has_import( $css_realpath ) |
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) { |
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$stylesheets[] = $concat_group; |
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$concat_group = null; |
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} |
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|
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// Start a new group if needed. |
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if ( null === $concat_group ) { |
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$concat_group = array( |
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'type' => 'concat', |
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'media' => $media, |
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'paths' => array(), |
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'handles' => array(), |
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); |
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} |
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|
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// Add this stylesheet to the current group. |
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$concat_group['paths'][] = $css_path; |
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$concat_group['handles'][] = $handle; |
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$this->done[] = $handle; |
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|
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// Inline styles must print right after their <link>, so break the group |
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// because we can't concat directly anything after this CSS. |
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if ( $this->has_inline_style( $handle ) ) { |
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$stylesheets[] = $concat_group; |
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$concat_group = null; |
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} |
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} else { |
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// Non-concat item - finish any current open group to preserve order. |
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if ( null !== $concat_group ) { |
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$stylesheets[] = $concat_group; |
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$concat_group = null; |
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} |
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// Add the non-concat item. |
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$stylesheets[] = array( |
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'type' => 'do_item', |
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'handle' => $handle, |
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); |
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} |
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unset( $this->to_do[ $key ] ); |
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} |
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|
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if ( null !== $concat_group ) { |
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$stylesheets[] = $concat_group; |
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} |
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|
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foreach ( $stylesheets as $css_array ) { |
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if ( 'do_item' === $css_array['type'] ) { |
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if ( $this->do_item( $css_array['handle'], $group ) ) { |
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$this->done[] = $css_array['handle']; |
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} |
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} elseif ( 'concat' === $css_array['type'] && isset( $css_array['paths'] ) ) { |
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$media = $css_array['media']; |
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$css = $css_array['paths']; |
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$handles = $css_array['handles']; |
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|
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if ( count( $css ) > 1 ) { |
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$fs_paths = array(); |
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foreach ( $css as $css_uri_path ) { |
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$fs_paths[] = $this->dependency_path_mapping->uri_path_to_fs_path( $css_uri_path ); |
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} |
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|
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$mtime = max( array_map( 'filemtime', $fs_paths ) ); |
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if ( page_optimize_use_concat_base_dir() ) { |
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$path_str = implode( ',', array_map( 'page_optimize_remove_concat_base_prefix', $fs_paths ) ); |
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} else { |
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$path_str = implode( ',', $css ); |
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} |
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$path_str = "$path_str?m=$mtime"; |
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|
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if ( $this->allow_gzip_compression ) { |
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$path_64 = base64_encode( gzcompress( $path_str ) ); |
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if ( strlen( $path_str ) > ( strlen( $path_64 ) + 1 ) ) { |
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$path_str = '-' . $path_64; |
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} |
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} |
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|
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$href = $siteurl . "/_static/??" . $path_str; |
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} else { |
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$href = Page_Optimize_Utils::cache_bust_mtime( $css[0], $siteurl ); |
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} |
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|
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$css_id = "$media-css-" . md5( $href ); |
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if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { |
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$tag = "<link data-handles='" . esc_attr( implode( ',', $handles ) ) . "' rel='stylesheet' id='$css_id' href='$href' type='text/css' media='$media' />\n"; |
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} else { |
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$tag = "<link rel='stylesheet' id='$css_id' href='$href' type='text/css' media='$media' />\n"; |
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} |
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|
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$tag = apply_filters( 'page_optimize_style_loader_tag', $tag, $handles, $href, $media ); |
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|
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if ( is_array( $handles ) && count( $handles ) === 1 ) { |
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$tag = apply_filters( 'style_loader_tag', $tag, $handles[0], $href, $media ); |
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} |
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|
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echo $tag; |
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array_map( array( $this, 'print_inline_style' ), $handles ); |
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} |
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} |
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|
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return $this->done; |
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} |
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|
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function __isset( $key ) { |
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return isset( $this->old_styles->$key ); |
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} |
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|
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function __unset( $key ) { |
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unset( $this->old_styles->$key ); |
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} |
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|
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function &__get( $key ) { |
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return $this->old_styles->$key; |
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} |
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|
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function __set( $key, $value ) { |
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$this->old_styles->$key = $value; |
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} |
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} |
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|
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function page_optimize_css_concat_init() { |
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global $wp_styles; |
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|
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$wp_styles = new Page_Optimize_CSS_Concat( $wp_styles ); |
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$wp_styles->allow_gzip_compression = ALLOW_GZIP_COMPRESSION; |
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} |
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|
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if ( page_optimize_should_concat_css() ) { |
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add_action( 'init', 'page_optimize_css_concat_init' ); |
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} |
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|
