309 lines
7.6 KiB
PHP
309 lines
7.6 KiB
PHP
|
<?php
|
||
|
|
namespace W3TC;
|
||
|
|
|
||
|
|
class Minify_AutoCss {
|
||
|
|
private $config;
|
||
|
|
private $buffer;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* CSS files to ignore
|
||
|
|
*
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
private $ignore_css_files;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Helper object to use
|
||
|
|
*
|
||
|
|
* @var _W3_MinifyHelpers
|
||
|
|
*/
|
||
|
|
private $minify_helpers;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Array of processed styles
|
||
|
|
*
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
private $debug_minified_urls = array();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Current position to embed minified style
|
||
|
|
*
|
||
|
|
* @var integer
|
||
|
|
*/
|
||
|
|
private $embed_pos;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Current list of files to minify
|
||
|
|
*
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
private $files_to_minify;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Current number of minification group
|
||
|
|
*
|
||
|
|
* @var integer
|
||
|
|
*/
|
||
|
|
private $debug = false;
|
||
|
|
private $embed_to_html;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Constructor
|
||
|
|
*
|
||
|
|
* @param unknown $config
|
||
|
|
* @param unknown $buffer
|
||
|
|
* @param unknown $minify_helpers
|
||
|
|
*/
|
||
|
|
function __construct( $config, $buffer, $minify_helpers ) {
|
||
|
|
$this->config = $config;
|
||
|
|
$this->debug = $config->get_boolean( 'minify.debug' );
|
||
|
|
$this->buffer = $buffer;
|
||
|
|
$this->minify_helpers = $minify_helpers;
|
||
|
|
|
||
|
|
// ignored files
|
||
|
|
$this->ignore_css_files = $this->config->get_array(
|
||
|
|
'minify.reject.files.css' );
|
||
|
|
$this->ignore_css_files = array_map( array( '\W3TC\Util_Environment',
|
||
|
|
'normalize_file' ), $this->ignore_css_files );
|
||
|
|
|
||
|
|
$this->embed_to_html = $this->config->get_boolean( 'minify.css.embed' );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Does auto-minification
|
||
|
|
*
|
||
|
|
* @return string buffer of minified content
|
||
|
|
*/
|
||
|
|
public function execute() {
|
||
|
|
// find all style tags
|
||
|
|
$buffer_nocomments = preg_replace( '~<!--.*?-->\s*~s', '', $this->buffer );
|
||
|
|
$matches = null;
|
||
|
|
|
||
|
|
// end of <head> means another group of styles, cannt be combined
|
||
|
|
if ( !preg_match_all( '~((<style\s*[^>]*>.*?</style>)|(<link\s+([^>]+)/?>(.*</link>)?))~is',
|
||
|
|
$buffer_nocomments, $matches ) ) {
|
||
|
|
$matches = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( is_null( $matches ) ) {
|
||
|
|
return $this->buffer;
|
||
|
|
}
|
||
|
|
|
||
|
|
$style_tags = $matches[1];
|
||
|
|
$style_tags = apply_filters( 'w3tc_minify_css_style_tags',
|
||
|
|
$style_tags );
|
||
|
|
|
||
|
|
// pass styles
|
||
|
|
$this->embed_pos = null;
|
||
|
|
$this->files_to_minify = array();
|
||
|
|
|
||
|
|
for ( $n = 0; $n < count( $style_tags ); $n++ ) {
|
||
|
|
$this->process_style_tag( $style_tags[$n], $n );
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->flush_collected( '' );
|
||
|
|
|
||
|
|
return $this->buffer;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns list of minified styles
|
||
|
|
*
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public function get_debug_minified_urls() {
|
||
|
|
return $this->debug_minified_urls;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Processes style tag
|
||
|
|
*
|
||
|
|
* @param unknown $style_tag
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
private function process_style_tag( $style_tag, $style_tag_number ) {
|
||
|
|
if ( $this->debug ) {
|
||
|
|
Minify_Core::log( 'processing tag ' . substr( $style_tag, 0, 150 ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
$tag_pos = strpos( $this->buffer, $style_tag );
|
||
|
|
if ( $tag_pos === false ) {
|
||
|
|
// style is external but not found, skip processing it
|
||
|
|
if ( $this->debug ) {
|
||
|
|
Minify_Core::log( 'style not found:' . $style_tag );
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
$style_href = null;
|
||
|
|
$causes_flush = true;
|
||
|
|
if ( preg_match( '~<link\s+([^>]+)/?>(.*</link>)?~Uis', $style_tag, $match ) ) {
|
||
|
|
// all link tags dont cause automatic flush since
|
||
|
|
// its minified or its not style <link> tag
|
||
|
|
$causes_flush = false;
|
||
|
|
|
||
|
|
$attrs = array();
|
||
|
|
$attr_matches = null;
|
||
|
|
if ( preg_match_all( '~(\w+)=["\']([^"\']*)["\']~', $match[1],
|
||
|
|
$attr_matches, PREG_SET_ORDER ) ) {
|
||
|
|
foreach ( $attr_matches as $attr_match ) {
|
||
|
|
$name = strtolower( $attr_match[1] );
|
||
|
|
$attrs[$name] = trim( $attr_match[2] );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( isset( $attrs['href'] ) && isset( $attrs['rel'] ) &&
|
||
|
|
stristr( $attrs['rel'], 'stylesheet' ) !== false &&
|
||
|
|
( !isset( $attrs['media'] ) || stristr( $attrs['media'], 'print' ) === false ) ) {
|
||
|
|
$style_href = $attrs['href'];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( $causes_flush ) {
|
||
|
|
$data = array(
|
||
|
|
'style_tag_original' => $style_tag,
|
||
|
|
'style_tag_new' => $style_tag,
|
||
|
|
'style_tag_number' => $style_tag_number,
|
||
|
|
'style_tag_pos' => $tag_pos,
|
||
|
|
'should_replace' => false,
|
||
|
|
'buffer' => $this->buffer
|
||
|
|
);
|
||
|
|
|
||
|
|
$data = apply_filters( 'w3tc_minify_css_do_local_style_minification',
|
||
|
|
$data );
|
||
|
|
$this->buffer = $data['buffer'];
|
||
|
|
|
||
|
|
if ( $data['should_replace'] ) {
|
||
|
|
$this->buffer = substr_replace( $this->buffer,
|
||
|
|
$data['style_tag_new'], $tag_pos,
|
||
|
|
strlen( $style_tag ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
// it's not external style, have to flush what we have before it
|
||
|
|
if ( $this->debug ) {
|
||
|
|
Minify_Core::log( 'its not link tag, flushing' );
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->flush_collected( $style_tag );
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if ( empty( $style_href ) ) {
|
||
|
|
if ( $this->debug ) {
|
||
|
|
Minify_Core::log( 'its not style link tag' );
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
$style_href = Util_Environment::url_relative_to_full( $style_href );
|
||
|
|
$file = Util_Environment::url_to_docroot_filename( $style_href );
|
||
|
|
|
||
|
|
$step1_result = $this->minify_helpers->is_file_for_minification(
|
||
|
|
$style_href, $file );
|
||
|
|
if ( $step1_result == 'url' )
|
||
|
|
$file = $style_href;
|
||
|
|
|
||
|
|
$step1 = !empty( $step1_result );
|
||
|
|
$step2 = !in_array( $file, $this->ignore_css_files );
|
||
|
|
|
||
|
|
$do_tag_minification = $step1 && $step2;
|
||
|
|
$do_tag_minification = apply_filters(
|
||
|
|
'w3tc_minify_css_do_tag_minification',
|
||
|
|
$do_tag_minification, $style_tag, $file );
|
||
|
|
|
||
|
|
if ( !$do_tag_minification ) {
|
||
|
|
if ( $this->debug ) {
|
||
|
|
Minify_Core::log( 'file ' . $file .
|
||
|
|
' didnt pass minification check:' .
|
||
|
|
' file_for_min: ' . ( $step1 ? 'true' : 'false' ) .
|
||
|
|
' ignore_css_files: ' . ( $step2 ? 'true' : 'false' ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
$data = array(
|
||
|
|
'style_tag_original' => $style_tag,
|
||
|
|
'style_tag_new' => $style_tag,
|
||
|
|
'style_tag_number' => $style_tag_number,
|
||
|
|
'style_tag_pos' => $tag_pos,
|
||
|
|
'style_href' => $style_href,
|
||
|
|
'should_replace' => false,
|
||
|
|
'buffer' => $this->buffer
|
||
|
|
);
|
||
|
|
|
||
|
|
$data = apply_filters( 'w3tc_minify_css_do_excluded_tag_style_minification',
|
||
|
|
$data );
|
||
|
|
$this->buffer = $data['buffer'];
|
||
|
|
|
||
|
|
if ( $data['should_replace'] ) {
|
||
|
|
$this->buffer = substr_replace( $this->buffer,
|
||
|
|
$data['style_tag_new'], $tag_pos,
|
||
|
|
strlen( $style_tag ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->flush_collected( $style_tag );
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->debug_minified_urls[] = $file;
|
||
|
|
$this->buffer = substr_replace( $this->buffer, '',
|
||
|
|
$tag_pos, strlen( $style_tag ) );
|
||
|
|
|
||
|
|
// put minified file at the place of first tag
|
||
|
|
if ( count( $this->files_to_minify ) <= 0 )
|
||
|
|
$this->embed_pos = $tag_pos;
|
||
|
|
$this->files_to_minify[] = $file;
|
||
|
|
|
||
|
|
if ( $this->config->get_string( 'minify.css.method' ) == 'minify' )
|
||
|
|
$this->flush_collected( '' );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Minifies collected styles
|
||
|
|
*/
|
||
|
|
private function flush_collected( $last_style_tag ) {
|
||
|
|
if ( count( $this->files_to_minify ) <= 0 )
|
||
|
|
return;
|
||
|
|
$do_flush_collected = apply_filters( 'w3tc_minify_css_do_flush_collected',
|
||
|
|
true, $last_style_tag, $this );
|
||
|
|
if ( !$do_flush_collected )
|
||
|
|
return;
|
||
|
|
|
||
|
|
// find embed position
|
||
|
|
$embed_pos = $this->embed_pos;
|
||
|
|
|
||
|
|
// build minified style tag
|
||
|
|
$data = array(
|
||
|
|
'files_to_minify' => $this->files_to_minify,
|
||
|
|
'embed_pos' => $embed_pos,
|
||
|
|
'buffer' => $this->buffer,
|
||
|
|
'embed_to_html' => $this->embed_to_html
|
||
|
|
);
|
||
|
|
|
||
|
|
$data = apply_filters( 'w3tc_minify_css_step', $data );
|
||
|
|
$this->buffer = $data['buffer'];
|
||
|
|
|
||
|
|
if ( !empty( $data['files_to_minify'] ) ) {
|
||
|
|
$style_data = $this->minify_helpers->generate_css_style_tag(
|
||
|
|
$data['files_to_minify'],
|
||
|
|
$data['embed_to_html'] );
|
||
|
|
|
||
|
|
$data['style_to_embed_url'] = $style_data['url'];
|
||
|
|
$data['style_to_embed_body'] = $style_data['body'];
|
||
|
|
$data = apply_filters( 'w3tc_minify_css_step_style_to_embed',
|
||
|
|
$data );
|
||
|
|
$this->buffer = $data['buffer'];
|
||
|
|
|
||
|
|
if ( $this->config->getf_boolean( 'minify.css.http2push' ) ) {
|
||
|
|
$this->minify_helpers->http2_header_add(
|
||
|
|
$data['style_to_embed_url'], 'style' );
|
||
|
|
}
|
||
|
|
|
||
|
|
// replace
|
||
|
|
$this->buffer = substr_replace( $this->buffer,
|
||
|
|
$data['style_to_embed_body'], $data['embed_pos'], 0 );
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->files_to_minify = array();
|
||
|
|
}
|
||
|
|
}
|