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<?php
/**
* W3 Minify plugin
*/
if (!defined('W3TC')) {
die();
}
w3_require_once(W3TC_LIB_W3_DIR . '/Plugin.php');
/**
* Class W3_Plugin_Minify
*/
class W3_Plugin_Minify extends W3_Plugin {
/**
* Minify reject reason
*
* @var string
*/
var $minify_reject_reason = '';
/**
* Error
*
* @var string
*/
var $error = '';
/**
* Array of printed styles
*
* @var array
*/
var $printed_styles = array();
/**
* Array of printed scripts
*
* @var array
*/
var $printed_scripts = array();
/**
* Array of replaced styles
*
* @var array
*/
var $replaced_styles = array();
/**
* Array of replaced scripts
*
* @var array
*/
var $replaced_scripts = array();
/**
* Helper object to use
*
* @var _W3_MinifyHelpers
*/
private $minify_helpers;
/**
* Runs plugin
*/
function run() {
add_filter('cron_schedules', array(
&$this,
'cron_schedules'
));
if ($this->_config->get_string('minify.engine') == 'file') {
add_action('w3_minify_cleanup', array(
&$this,
'cleanup'
));
}
/**
* Start minify
*/
if ($this->can_minify()) {
w3tc_add_ob_callback('minify', array($this,'ob_callback'));
}
if (!is_admin()) {
$dispatcher = w3_instance('W3_Dispatcher');
if($dispatcher->send_minify_headers($this->_config))
add_action('send_headers', array(
&$this,
'send_headers'
));
}
}
/**
* Does disk cache cleanup
*
* @return void
*/
function cleanup() {
$a = w3_instance('W3_Plugin_MinifyAdmin');
$a->cleanup();
}
/**
* Cron schedules filter
*
* @param array $schedules
* @return array
*/
function cron_schedules($schedules) {
$gc = $this->_config->get_integer('minify.file.gc');
return array_merge($schedules, array(
'w3_minify_cleanup' => array(
'interval' => $gc,
'display' => sprintf('[W3TC] Minify file GC (every %d seconds)', $gc)
)
));
}
/**
* OB callback
*
* @param string $buffer
* @return string
*/
function ob_callback(&$buffer) {
if ($buffer != '' && w3_is_xml($buffer)) {
if ($this->can_minify2($buffer)) {
$this->minify_helpers = new _W3_MinifyHelpers($this->_config);
/**
* Replace script and style tags
*/
if (function_exists('is_feed') && !is_feed()) {
w3_require_once(W3TC_INC_DIR . '/functions/extract.php');
$head_prepend = '';
$body_prepend = '';
$body_append = '';
$embed_extsrcjs = false;
if ($this->_config->get_boolean('minify.auto')) {
if ($this->_config->get_boolean('minify.js.enable')) {
$minifier = new _W3_MinifyJsAuto($this->_config,
$buffer, $this->minify_helpers);
$buffer = $minifier->execute();
$this->replaced_scripts =
$minifier->get_debug_minified_urls();
}
if ($this->_config->get_boolean('minify.css.enable')) {
$ignore_css_files = $this->_config->get_array('minify.reject.files.css');
$files_to_minify = array();
$embed_pos = strpos($buffer, '<!-- W3TC-include-css -->');
$buffer = str_replace('<!-- W3TC-include-css -->', '', $buffer);
if ($embed_pos === false) {
preg_match('~<head(\s+[^<>]+)*>~Ui', $buffer, $match, PREG_OFFSET_CAPTURE);
$embed_pos = strlen($match[0][0]) + $match[0][1];
}
$ignore_css_files = array_map('w3_normalize_file', $ignore_css_files);
$handled_styles = array();
$style_tags = w3_extract_css2($buffer);
$previous_file_was_ignored = false;
foreach ($style_tags as $style_tag_tuple) {
$style_tag = $style_tag_tuple[0];
$tag_pos = strpos($buffer, $style_tag);
$match = array();
$file = $style_tag_tuple[1];
$file = w3_normalize_file_minify2($file);
$style_len = strlen($style_tag);
if (!$this->minify_helpers->is_file_for_minification($file) ||
in_array($file, $handled_styles)) {
continue;
}
$handled_styles[] = $file;
$this->replaced_styles[] = $file;
if (in_array($file, $ignore_css_files)) {
if ($tag_pos > $embed_pos) {
if ($files_to_minify) {
$style = $this->get_style_custom($files_to_minify);
$buffer = substr_replace($buffer, $style, $embed_pos, 0);
$files_to_minify = array();
$style_len = $style_len +strlen($style);
}
$embed_pos = $embed_pos + $style_len;
$previous_file_was_ignored = true;
}
} else {
$buffer = substr_replace($buffer,'', $tag_pos, $style_len);
if ($embed_pos > $tag_pos)
$embed_pos -= $style_len;
elseif ($previous_file_was_ignored)
$embed_pos = $tag_pos;
$files_to_minify[] = $file;
}
}
$style = $this->get_style_custom($files_to_minify);
$buffer = substr_replace($buffer, $style, $embed_pos, 0);
}
} else {
if ($this->_config->get_boolean('minify.css.enable') && !in_array('include', $this->printed_styles)) {
$style = $this->get_style_group('include');
if ($style) {
if ($this->_custom_location_does_not_exist('/<!-- W3TC-include-css -->/', $buffer, $style))
$head_prepend .= $style;
$this->remove_styles_group($buffer, 'include');
}
}
if ($this->_config->get_boolean('minify.js.enable')) {
if (!in_array('include', $this->printed_scripts)) {
$embed_type = $this->_config->get_string('minify.js.header.embed_type');
$script = $this->get_script_group('include',$embed_type);
if ($script) {
$embed_extsrcjs = $embed_type == 'extsrc' || $embed_type == 'asyncsrc'?true:$embed_extsrcjs;
if ($this->_custom_location_does_not_exist('/<!-- W3TC-include-js-head -->/', $buffer, $script))
$head_prepend .= $script;
$this->remove_scripts_group($buffer, 'include');
}
}
if (!in_array('include-body', $this->printed_scripts)) {
$embed_type = $this->_config->get_string('minify.js.body.embed_type');
$script = $this->get_script_group('include-body',$embed_type);
if ($script) {
$embed_extsrcjs = $embed_type == 'extsrc' || $embed_type == 'asyncsrc'?true:$embed_extsrcjs;
if ($this->_custom_location_does_not_exist('/<!-- W3TC-include-js-body-start -->/', $buffer, $script))
$body_prepend .= $script;
$this->remove_scripts_group($buffer, 'include-body');
}
}
if (!in_array('include-footer', $this->printed_scripts)) {
$embed_type = $this->_config->get_string('minify.js.footer.embed_type');
$script = $this->get_script_group('include-footer',$embed_type);
if ($script) {
$embed_extsrcjs = $embed_type == 'extsrc' || $embed_type == 'asyncsrc'?true:$embed_extsrcjs;
if ($this->_custom_location_does_not_exist('/<!-- W3TC-include-js-body-end -->/', $buffer, $script))
$body_append .= $script;
$this->remove_scripts_group($buffer, 'include-footer');
}
}
}
}
if ($head_prepend != '') {
$buffer = preg_replace('~<head(\s+[^<>]+)*>~Ui', '\\0' . $head_prepend, $buffer, 1);
}
if ($body_prepend != '') {
$buffer = preg_replace('~<body(\s+[^<>]+)*>~Ui', '\\0' . $body_prepend, $buffer, 1);
}
if ($body_append != '') {
$buffer = preg_replace('~<\\/body>~', $body_append . '\\0', $buffer, 1);
}
if ($embed_extsrcjs) {
$script = "
<script type=\"text/javascript\">
" ."var extsrc=null;
".'(function(){function j(){if(b&&g){document.write=k;document.writeln=l;var f=document.createElement("span");f.innerHTML=b;g.appendChild(f);b=""}}function d(){j();for(var f=document.getElementsByTagName("script"),c=0;c<f.length;c++){var e=f[c],h=e.getAttribute("asyncsrc");if(h){e.setAttribute("asyncsrc","");var a=document.createElement("script");a.async=!0;a.src=h;document.getElementsByTagName("head")[0].appendChild(a)}if(h=e.getAttribute("extsrc")){e.setAttribute("extsrc","");g=document.createElement("span");e.parentNode.insertBefore(g,e);document.write=function(a){b+=a};document.writeln=function(a){b+=a;b+="\n"};a=document.createElement("script");a.async=!0;a.src=h;/msie/i.test(navigator.userAgent)&&!/opera/i.test(navigator.userAgent)?a.onreadystatechange=function(){("loaded"==this.readyState||"complete"==this.readyState)&&d()}:-1!=navigator.userAgent.indexOf("Firefox")||"onerror"in a?(a.onload=d,a.onerror=d):(a.onload=d,a.onreadystatechange=d);document.getElementsByTagName("head")[0].appendChild(a);return}}j();document.write=k;document.writeln=l;for(c=0;c<extsrc.complete.funcs.length;c++)extsrc.complete.funcs[c]()}function i(){arguments.callee.done||(arguments.callee.done=!0,d())}extsrc={complete:function(b){this.complete.funcs.push(b)}};extsrc.complete.funcs=[];var k=document.write,l=document.writeln,b="",g="";document.addEventListener&&document.addEventListener("DOMContentLoaded",i,!1);if(/WebKit/i.test(navigator.userAgent))var m=setInterval(function(){/loaded|complete/.test(document.readyState)&&(clearInterval(m),i())},10);window.onload=i})();' . "
</script>
";
$buffer = preg_replace('~<head(\s+[^<>]+)*>~Ui', '\\0' . $script, $buffer, 1);
}
}
/**
* Minify HTML/Feed
*/
if ($this->_config->get_boolean('minify.html.enable')) {
try {
$this->minify_html($buffer);
} catch (Exception $exception) {
$this->error = $exception->getMessage();
}
}
}
if ($this->_config->get_boolean('minify.debug')) {
$buffer .= "\r\n\r\n" . $this->get_debug_info();
}
}
return $buffer;
}
/**
* Checks to see if pattern exists in source if so replaces it with the provided script
* and returns false. If pattern does not exists returns true.
* @param $pattern
* @param $source
* @param $script
* @return bool
*/
function _custom_location_does_not_exist($pattern, &$source, $script){
$count = 0;
$source = preg_replace($pattern, $script, $source, 1, $count);
return $count==0;
}
/**
* Parse buffer and return array of JS files from it
*
* @param string $buffer
* @return array
*/
function get_files_js(&$buffer) {
w3_require_once(W3TC_INC_DIR . '/functions/extract.php');
$files = w3_extract_js($buffer);
$files = $this->filter_files($files);
return $files;
}
/**
* Parse buffer and return array of CSS files from it
*
* @param string $buffer
* @return array
*/
function get_files_css(&$buffer) {
w3_require_once(W3TC_INC_DIR . '/functions/extract.php');
$files = w3_extract_css($buffer);
$files = $this->filter_files($files);
return $files;
}
/**
* Filters files
*
* @param array $files
* @return array
*/
function filter_files($files) {
$files = array_map('w3_normalize_file_minify2', $files);
$files = array_filter($files, array($this->minify_helpers, 'is_file_for_minification'));
$files = array_values(array_unique($files));
return $files;
}
/**
* Removes style tags from the source
*
* @param string $content
* @param array $files
* @return void
*/
function remove_styles(&$content, $files) {
$regexps = array();
$home_url_regexp = w3_get_home_url_regexp();
$path = '';
if (w3_is_network() && !w3_is_subdomain_install())
$path = ltrim(w3_get_home_path(), '/');
foreach ($files as $file) {
if ($path && strpos($file, $path) === 0)
$file = substr($file, strlen($path));
$this->replaced_styles[] = $file;
if (w3_is_url($file) && !preg_match('~' . $home_url_regexp . '~i', $file)) {
// external CSS files
$regexps[] = w3_preg_quote($file);
} else {
// local CSS files
$file = ltrim($file, '/');
if (home_url() == site_url() && ltrim(w3_get_site_path(),'/') && strpos($file, ltrim(w3_get_site_path(),'/')) === 0)
$file = str_replace(ltrim(w3_get_site_path(),'/'), '', $file);
$file = ltrim(preg_replace('~' . $home_url_regexp . '~i', '', $file), '/\\');
$regexps[] = '(' . $home_url_regexp . ')?/?' . w3_preg_quote($file);
}
}
foreach ($regexps as $regexp) {
$content = preg_replace('~<link\s+[^<>]*href=["\']?' . $regexp . '["\']?[^<>]*/?>(.*</link>)?~Uis', '', $content);
$content = preg_replace('~@import\s+(url\s*)?\(?["\']?\s*' . $regexp . '\s*["\']?\)?[^;]*;?~is', '', $content);
}
$content = preg_replace('~<style[^<>]*>\s*</style>~', '', $content);
}
/**
* Remove script tags from the source
*
* @param string $content
* @param array $files
* @return void
*/
function remove_scripts(&$content, $files) {
$regexps = array();
$home_url_regexp = w3_get_home_url_regexp();
$path = '';
if (w3_is_network() && !w3_is_subdomain_install())
$path = ltrim(w3_get_home_path(), '/');
foreach ($files as $file) {
if ($path && strpos($file, $path) === 0)
$file = substr($file, strlen($path));
$this->replaced_scripts[] = $file;
if (w3_is_url($file) && !preg_match('~' . $home_url_regexp . '~i', $file)) {
// external JS files
$regexps[] = w3_preg_quote($file);
} else {
// local JS files
$file = ltrim($file, '/');
if (home_url() == site_url() && ltrim(w3_get_site_path(),'/') && strpos($file, ltrim(w3_get_site_path(),'/')) === 0)
$file = str_replace(ltrim(w3_get_site_path(),'/'), '', $file);
$file = ltrim(preg_replace('~' . $home_url_regexp . '~i', '', $file), '/\\');
$regexps[] = '(' . $home_url_regexp . ')?/?' . w3_preg_quote($file);
}
}
foreach ($regexps as $regexp) {
$content = preg_replace('~<script\s+[^<>]*src=["\']?' . $regexp . '["\']?[^<>]*>\s*</script>~Uis', '', $content);
}
}
/**
* Removes style tag from the source for group
*
* @param string $content
* @param string $location
* @return void
*/
function remove_styles_group(&$content, $location) {
$theme = $this->get_theme();
$template = $this->get_template();
$files = array();
$groups = $this->_config->get_array('minify.css.groups');
if (isset($groups[$theme]['default'][$location]['files'])) {
$files = (array) $groups[$theme]['default'][$location]['files'];
}
if ($template != 'default' && isset($groups[$theme][$template][$location]['files'])) {
$files = array_merge($files, (array) $groups[$theme][$template][$location]['files']);
}
$this->remove_styles($content, $files);
}
/**
* Removes script tags from the source for group
*
* @param string $content
* @param string $location
* @return void
*/
function remove_scripts_group(&$content, $location) {
$theme = $this->get_theme();
$template = $this->get_template();
$files = array();
$groups = $this->_config->get_array('minify.js.groups');
if (isset($groups[$theme]['default'][$location]['files'])) {
$files = (array) $groups[$theme]['default'][$location]['files'];
}
if ($template != 'default' && isset($groups[$theme][$template][$location]['files'])) {
$files = array_merge($files, (array) $groups[$theme][$template][$location]['files']);
}
$this->remove_scripts($content, $files);
}
/**
* Minifies HTML
*
* @param string $html
* @return string
*/
function minify_html(&$html) {
$w3_minifier = w3_instance('W3_Minifier');
$ignored_comments = $this->_config->get_array('minify.html.comments.ignore');
if (count($ignored_comments)) {
w3_require_once(W3TC_LIB_MINIFY_DIR . '/Minify/IgnoredCommentPreserver.php');
$ignored_comments_preserver = new Minify_IgnoredCommentPreserver();
$ignored_comments_preserver->setIgnoredComments($ignored_comments);
$ignored_comments_preserver->search($html);
}
if ($this->_config->get_boolean('minify.html.inline.js')) {
$js_engine = $this->_config->get_string('minify.js.engine');
if (!$w3_minifier->exists($js_engine) || !$w3_minifier->available($js_engine)) {
$js_engine = 'js';
}
$js_minifier = $w3_minifier->get_minifier($js_engine);
$js_options = $w3_minifier->get_options($js_engine);
$w3_minifier->init($js_engine);
w3_require_once(W3TC_LIB_MINIFY_DIR . '/Minify/Inline.php');
w3_require_once(W3TC_LIB_MINIFY_DIR . '/Minify/Inline/JavaScript.php');
$html = Minify_Inline_JavaScript::minify($html, $js_minifier, $js_options);
}
if ($this->_config->get_boolean('minify.html.inline.css')) {
$css_engine = $this->_config->get_string('minify.css.engine');
if (!$w3_minifier->exists($css_engine) || !$w3_minifier->available($css_engine)) {
$css_engine = 'css';
}
$css_minifier = $w3_minifier->get_minifier($css_engine);
$css_options = $w3_minifier->get_options($css_engine);
$w3_minifier->init($css_engine);
w3_require_once(W3TC_LIB_MINIFY_DIR . '/Minify/Inline.php');
w3_require_once(W3TC_LIB_MINIFY_DIR . '/Minify/Inline/CSS.php');
$html = Minify_Inline_CSS::minify($html, $css_minifier, $css_options);
}
$engine = $this->_config->get_string('minify.html.engine');
if (!$w3_minifier->exists($engine) || !$w3_minifier->available($engine)) {
$engine = 'html';
}
if (function_exists('is_feed') && is_feed()) {
$engine .= 'xml';
}
$minifier = $w3_minifier->get_minifier($engine);
$options = $w3_minifier->get_options($engine);
$w3_minifier->init($engine);
$html = call_user_func($minifier, $html, $options);
if (isset($ignored_comments_preserver)) {
$ignored_comments_preserver->replace($html);
}
}
/**
* Returns current theme
*
* @return string
*/
function get_theme() {
static $theme = null;
if ($theme === null) {
$theme = w3_get_theme_key(get_theme_root(), get_template(), get_stylesheet());
}
return $theme;
}
/**
* Returns current template
*
* @return string
*/
function get_template() {
static $template = null;
if ($template === null) {
$template_file = 'index.php';
switch (true) {
case (is_404() && ($template_file = get_404_template())):
case (is_search() && ($template_file = get_search_template())):
case (is_tax() && ($template_file = get_taxonomy_template())):
case (is_front_page() && function_exists('get_front_page_template') && $template_file = get_front_page_template()):
case (is_home() && ($template_file = get_home_template())):
case (is_attachment() && ($template_file = get_attachment_template())):
case (is_single() && ($template_file = get_single_template())):
case (is_page() && ($template_file = get_page_template())):
case (is_category() && ($template_file = get_category_template())):
case (is_tag() && ($template_file = get_tag_template())):
case (is_author() && ($template_file = get_author_template())):
case (is_date() && ($template_file = get_date_template())):
case (is_archive() && ($template_file = get_archive_template())):
case (is_comments_popup() && ($template_file = get_comments_popup_template())):
case (is_paged() && ($template_file = get_paged_template())):
break;
default:
if (function_exists('get_index_template')) {
$template_file = get_index_template();
} else {
$template_file = 'index.php';
}
break;
}
$template = basename($template_file, '.php');
}
return $template;
}
/**
* Returns style tag
*
* @param string $url
* @param boolean $import
* @param boolean $use_style
* @return string
*/
function get_style($url, $import = false, $use_style = true) {
if ($import && $use_style) {
return "<style type=\"text/css\" media=\"all\">@import url(\"" . $url . "\");</style>\r\n";
} elseif ($import && !$use_style) {
return "@import url(\"" . $url . "\");\r\n";
}else {
return "<link rel=\"stylesheet\" type=\"text/css\" href=\"" . str_replace('&', '&', $url) . "\" media=\"all\" />\r\n";
}
}
/**
* Returns style tag for style group
*
* @param string $location
* @return array
*/
function get_style_group($location) {
$style = false;
$type = 'css';
$groups = $this->_config->get_array('minify.css.groups');
$theme = $this->get_theme();
$template = $this->get_template();
if ($template != 'default' && empty($groups[$theme][$template][$location]['files'])) {
$template = 'default';
}
if (!empty($groups[$theme][$template][$location]['files'])) {
$url = $this->format_url_group($theme, $template, $location, $type);
if ($url) {
$import = (isset($groups[$theme][$template][$location]['import']) ? (boolean) $groups[$theme][$template][$location]['import'] : false);
$style = $this->get_style($url, $import);
}
}
return $style;
}
/**
* Returns script tag for script group
*
* @param string $location
* @param string $embed_type
* @return array
*/
function get_script_group($location, $embed_type = 'blocking') {
$script = false;
$fileType = 'js';
$theme = $this->get_theme();
$template = $this->get_template();
$groups = $this->_config->get_array('minify.js.groups');
if ($template != 'default' && empty($groups[$theme][$template][$location]['files'])) {
$template = 'default';
}
if (!empty($groups[$theme][$template][$location]['files'])) {
$url = $this->format_url_group($theme, $template, $location, $fileType);
if ($url) {
$script = $this->minify_helpers->generate_script_tag($url, $embed_type);
}
}
return $script;
}
/**
* Returns style tag for custom files
*
* @param string|array $files
* @param boolean $import
* @param boolean $use_style
* @return string
*/
function get_style_custom($files, $import = false, $use_style = false) {
$style = false;
if (count($files)) {
$urls = $this->minify_helpers->get_minify_urls_for_files($files, 'css');
$style = '';
if ($urls) {
foreach ($urls as $url) {
$style .= $this->get_style($url, $import, $use_style);
}
}
}
return $style;
}
/**
* Formats URL
*
* @param string $theme
* @param string $template
* @param string $location
* @param string $type
* @return string
*/
function format_url_group($theme, $template, $location, $type) {
/**
* @var W3_Minify $w3_minify
*/
$w3_minify = w3_instance('W3_Minify');
$url = false;
$id = $w3_minify->get_id_group($theme, $template, $location, $type);
if ($id) {
$minify_filename = $theme . '/' . $template . '.' . $location .
'.'. $id . '.' . $type;
$filename = w3_cache_blog_dir('minify') . '/' . $minify_filename;
if ($this->_config->get_boolean('minify.rewrite')) {
$url = w3_filename_to_url($filename);
} else {
$url = plugins_url('pub/minify.php?file=' . $minify_filename, W3TC_FILE);
}
}
return $url;
}
/**
* Returns array of minify URLs
*
* @return array
*/
function get_urls() {
$files = array();
$js_groups = $this->_config->get_array('minify.js.groups');
$css_groups = $this->_config->get_array('minify.css.groups');
foreach ($js_groups as $js_theme => $js_templates) {
foreach ($js_templates as $js_template => $js_locations) {
foreach ((array) $js_locations as $js_location => $js_config) {
if (!empty($js_config['files'])) {
$files[] = $this->format_url_group($js_theme, $js_template, $js_location, 'js');
}
}
}
}
foreach ($css_groups as $css_theme => $css_templates) {
foreach ($css_templates as $css_template => $css_locations) {
foreach ((array) $css_locations as $css_location => $css_config) {
if (!empty($css_config['files'])) {
$files[] = $this->format_url_group($css_theme, $css_template, $css_location, 'css');
}
}
}
}
return $files;
}
/**
* Returns debug info
*
* @return string
*/
function get_debug_info() {
$debug_info = "<!-- W3 Total Cache: Minify debug info:\r\n";
$debug_info .= sprintf("%s%s\r\n", str_pad('Engine: ', 20), w3_get_engine_name($this->_config->get_string('minify.engine')));
$debug_info .= sprintf("%s%s\r\n", str_pad('Theme: ', 20), $this->get_theme());
$debug_info .= sprintf("%s%s\r\n", str_pad('Template: ', 20), $this->get_template());
if ($this->minify_reject_reason) {
$debug_info .= sprintf("%s%s\r\n", str_pad('Reject reason: ', 20), $this->minify_reject_reason);
}
if ($this->error) {
$debug_info .= sprintf("%s%s\r\n", str_pad('Errors: ', 20), $this->error);
}
if (count($this->replaced_styles)) {
$debug_info .= "\r\nReplaced CSS files:\r\n";
foreach ($this->replaced_styles as $index => $file) {
$debug_info .= sprintf("%d. %s\r\n", $index + 1, w3_escape_comment($file));
}
}
if (count($this->replaced_scripts)) {
$debug_info .= "\r\nReplaced JavaScript files:\r\n";
foreach ($this->replaced_scripts as $index => $file) {
$debug_info .= sprintf("%d. %s\r\n", $index + 1, w3_escape_comment($file));
}
}
$debug_info .= '-->';
return $debug_info;
}
/**
* Check if we can do minify logic
*
* @return boolean
*/
function can_minify() {
/**
* Skip if doint AJAX
*/
if (defined('DOING_AJAX')) {
$this->minify_reject_reason = 'Doing AJAX';
return false;
}
/**
* Skip if doing cron
*/
if (defined('DOING_CRON')) {
$this->minify_reject_reason = 'Doing cron';
return false;
}
/**
* Skip if APP request
*/
if (defined('APP_REQUEST')) {
$this->minify_reject_reason = 'Application request';
return false;
}
/**
* Skip if XMLRPC request
*/
if (defined('XMLRPC_REQUEST')) {
$this->minify_reject_reason = 'XMLRPC request';
return false;
}
/**
* Skip if Admin
*/
if (defined('WP_ADMIN')) {
$this->minify_reject_reason = 'wp-admin';
return false;
}
/**
* Check for WPMU's and WP's 3.0 short init
*/
if (defined('SHORTINIT') && SHORTINIT) {
$this->minify_reject_reason = 'Short init';
return false;
}
/**
* Check User agent
*/
if (!$this->check_ua()) {
$this->minify_reject_reason = 'User agent is rejected';
return false;
}
/**
* Check request URI
*/
if (!$this->check_request_uri()) {
$this->minify_reject_reason = 'Request URI is rejected';
return false;
}
/**
* Skip if user is logged in
*/
if ($this->_config->get_boolean('minify.reject.logged') && !$this->check_logged_in()) {
$this->minify_reject_reason = 'User is logged in';
return false;
}
return true;
}
/**
* Returns true if we can minify
*
* @param string $buffer
* @return string
*/
function can_minify2(&$buffer) {
/**
* Check for database error
*/
if (w3_is_database_error($buffer)) {
$this->minify_reject_reason = 'Database Error occurred';
return false;
}
/**
* Check for DONOTMINIFY constant
*/
if (defined('DONOTMINIFY') && DONOTMINIFY) {
$this->minify_reject_reason = 'DONOTMINIFY constant is defined';
return false;
}
/**
* Check feed minify
*/
if ($this->_config->get_boolean('minify.html.reject.feed') && function_exists('is_feed') && is_feed()) {
$this->minify_reject_reason = 'Feed is rejected';
return false;
}
return true;
}
/**
* Checks User Agent
*
* @return boolean
*/
function check_ua() {
$uas = array_merge($this->_config->get_array('minify.reject.ua'), array(
W3TC_POWERED_BY
));
foreach ($uas as $ua) {
if (!empty($ua)) {
if (isset($_SERVER['HTTP_USER_AGENT']) && stristr($_SERVER['HTTP_USER_AGENT'], $ua) !== false) {
return false;
}
}
}
return true;
}
/**
* Check if user is logged in
*
* @return boolean
*/
function check_logged_in() {
foreach (array_keys($_COOKIE) as $cookie_name) {
if (strpos($cookie_name, 'wordpress_logged_in') === 0)
return false;
}
return true;
}
/**
* Checks request URI
*
* @return boolean
*/
function check_request_uri() {
$auto_reject_uri = array(
'wp-login',
'wp-register'
);
foreach ($auto_reject_uri as $uri) {
if (strstr($_SERVER['REQUEST_URI'], $uri) !== false) {
return false;
}
}
$reject_uri = $this->_config->get_array('minify.reject.uri');
$reject_uri = array_map('w3_parse_path', $reject_uri);
foreach ($reject_uri as $expr) {
$expr = trim($expr);
if ($expr != '' && preg_match('~' . $expr . '~i', $_SERVER['REQUEST_URI'])) {
return false;
}
}
w3_require_once(W3TC_LIB_W3_DIR . '/Request.php');
if (W3_Request::get_string('wp_customize'))
return false;
return true;
}
/**
* Send headers
*/
function send_headers() {
@header('X-W3TC-Minify: On');
}
}
class _W3_MinifyHelpers {
/**
* Config
*
* @var W3_Config
*/
private $config;
/**
* Constructor
*
* @param W3_COnfig $config
*/
function __construct($config) {
$this->config = $config;
}
/**
* Formats custom URL
*
* @param array $files
* @param string $type
* @return array
*/
function get_minify_urls_for_files($files, $type) {
$w3_minify = w3_instance('W3_Minify');
$urls = array();
$minify_filenames = $w3_minify->compress_minify_files($files, $type);
foreach ($minify_filenames as $minify_filename) {
$filename = w3_cache_blog_dir('minify') . '/' . $minify_filename;
if ($this->config->get_boolean('minify.rewrite')) {
$urls[] = w3_filename_to_url($filename);
} else {
$urls[] = plugins_url('pub/minify.php?file=' . $minify_filename, W3TC_FILE);
}
}
return $urls;
}
/**
* Prints script tag
*
* @param string $url
* @param string $embed_type
* @return string
*/
function generate_script_tag($url, $embed_type = 'blocking') {
static $non_blocking_function = false;
if ($embed_type == 'blocking') {
$script = '<script type="text/javascript" src="' .
str_replace('&', '&', $url) . '"></script>';
} else {
$script = '';
if($embed_type == 'nb-js'){
if (!$non_blocking_function) {
$non_blocking_function = true;
$script = "<script type=\"text/javascript\">function w3tc_load_js(u){var d=document,p=d.getElementsByTagName('HEAD')[0],c=d.createElement('script');c.type='text/javascript';c.src=u;p.appendChild(c);}</script>";
}
$script .= "<script type=\"text/javascript\">w3tc_load_js('" .
$url . "');</script>";
} else if ($embed_type == 'nb-async') {
$script = '<script async type="text/javascript" src="' .
str_replace('&', '&', $url) . '"></script>';
} else if ($embed_type == 'nb-defer') {
$script = '<script defer type="text/javascript" src="' .
str_replace('&', '&', $url) . '"></script>';
} else if ($embed_type == 'extsrc') {
$script = '<script type="text/javascript" extsrc="' .
str_replace('&', '&', $url) . '"></script>';
} else if ($embed_type == 'asyncsrc') {
$script = '<script type="text/javascript" asyncsrc="' .
str_replace('&', '&', $url) . '"></script>';
}
}
return $script . "\r\n";
}
/**
* URL file filter
*
* @param string $file
* @return bool
*/
public function is_file_for_minification($file) {
static $external;
$ext = strrchr($file, '.');
if ($ext != '.js' && $ext != '.css') {
return false;
}
if (!isset($external))
$external = $this->config->get_array('minify.cache.files');
foreach($external as $ext) {
if(preg_match('#'.w3_get_url_regexp($ext).'#',$file))
return true;
}
if (w3_is_url($file)) {
return false;
}
$path = w3_get_document_root() . '/' . $file;
if (!file_exists($path)) {
return false;
}
return true;
}
}
/**
* Class _W3_MinifyJsAuto
*/
class _W3_MinifyJsAuto {
/**
* Config
*
* @var W3_Config
*/
private $config;
/**
* Processed buffer
*
* @var string
*/
private $buffer;
/**
* JS files to ignore
*
* @var array
*/
private $ignore_js_files;
/**
* Embed type
*
* @var string
*/
private $embed_type;
/**
* Helper object to use
*
* @var _W3_MinifyHelpers
*/
private $minify_helpers;
/**
* Array of processed scripts
*
* @var array
*/
private $debug_minified_urls = array();
/**
* Current position to embed minified script
*
* @var integer
*/
private $embed_pos;
/**
* Current list of files to minify
*
* @var array
*/
private $files_to_minify;
/**
* Current group type
*
* @var string
*/
private $group_type = 'head';
/**
* Current number of minification group
*
* @var integer
*/
private $minify_group_number = 0;
/**
* Constructor
*
* @param $config
* @param $buffer
* @param $minify_helpers
*/
function __construct($config, $buffer, $minify_helpers) {
$this->config = $config;
$this->buffer = $buffer;
$this->minify_helpers = $minify_helpers;
// ignored files
$this->ignore_js_files = $this->config->get_array('minify.reject.files.js');
$this->ignore_js_files = array_map('w3_normalize_file', $this->ignore_js_files);
// define embed type
$this->embed_type = $this->config->get_string(
'minify.js.header.embed_type');
if ($this->embed_type != 'extsrc' && $this->embed_type != 'asyncsrc')
$this->embed_type = 'blocking';
}
/**
* Does auto-minification
* @return string buffer of minified content
*/
public function execute() {
// find all script tags
$buffer_nocomments = preg_replace('~<!--.*?-->~s', '', $this->buffer);
$matches = null;
// end of <head> means another group of scripts, cannt be combined
if (!preg_match_all('~(<script\s+[^>]*>.*?</script>\s*|</head>)~is',
$buffer_nocomments, $matches)) {
$matches = null;
}
if (is_null($matches)) {
return $this->buffer;
}
$script_tags = $matches[1];
// pass scripts
$this->embed_pos = null;
$this->files_to_minify = array();
foreach ($script_tags as $script_tag) {
$this->process_script_tag($script_tag);
}
$this->flush_collected();
return $this->buffer;
}
/**
* Returns list of minified scripts
* @return array
*/
public function get_debug_minified_urls() {
return $this->debug_minified_urls;
}
/**
* Processes script tag
* @param $script_tag
* @return void
*/
private function process_script_tag($script_tag) {
$tag_pos = strpos($this->buffer, $script_tag);
$match = null;
if (!preg_match('~<script\s+[^<>]*src=["\']?([^"\'> ]+)["\'> ]~is',
$script_tag, $match)) {
$match = null;
}
if (is_null($match)) {
if (preg_match('~</head>~is', $script_tag, $match)) {
$this->group_type = 'body';
}
// it's not external script, have to flush what we have before it
$this->flush_collected();
return;
}
if ($tag_pos === false) {
// script is external but not found, skip processing it
return;
}
$file = $match[1];
$file = w3_normalize_file_minify2($file);
if (!$this->minify_helpers->is_file_for_minification($file) ||
in_array($file, $this->ignore_js_files)) {
$this->flush_collected();
return;
}
$this->debug_minified_urls[] = $file;
$this->buffer = substr_replace($this->buffer, '',
$tag_pos, strlen($script_tag));
// for head group - put minified file at the place of first script
// for body - put at the place of last script, to make as more DOM
// objects available as possible
if (count($this->files_to_minify) <= 0 || $this->group_type == 'body')
$this->embed_pos = $tag_pos;
$this->files_to_minify[] = $file;
}
/**
* Minifies collected scripts
*/
private function flush_collected() {
if (count($this->files_to_minify) <= 0)
return;
// find embed position
$embed_pos = $this->embed_pos;
if ($this->minify_group_number <= 0 && $this->group_type == 'head') {
// try forced embed position
$forced_embed_pos = strpos($this->buffer,
'<!-- W3TC-include-js-head -->');
if ($forced_embed_pos !== false) {
$this->buffer = str_replace('<!-- W3TC-include-js-head -->', '',
$this->buffer);
$embed_pos = $forced_embed_pos;
}
}
// build minified script tag
$urls = $this->minify_helpers->get_minify_urls_for_files(
$this->files_to_minify, 'js');
$script = '';
if (is_array($urls)) {
foreach ($urls as $url) {
$script .= $this->minify_helpers->generate_script_tag($url,
$this->embed_type);
}
}
// replace
$this->buffer = substr_replace($this->buffer, $script, $embed_pos, 0);
$this->files_to_minify = array();
$this->minify_group_number++;
}
}
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