/**
* OB callback
*
* @param string $buffer
* @return string
*/
function ob_callback(&$buffer)
{
if ($buffer != '' && w3_is_xml($buffer)) {
if ($this->can_minify2($buffer)) {
/**
* 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')) {
$ignore_js_files = $this->_config->get_array('minify.reject.files.js');
$embed_type = $this->_config->get_string('minify.js.header.embed_type');
$embed_type = $embed_type == 'extsrc' || $embed_type == 'asyncsrc' ? 'blocking' : $embed_type;
$embed_pos = strpos($buffer, '<!-- W3TC-include-js-head -->');
$buffer = str_replace('<!-- W3TC-include-js-head -->', '', $buffer);
if ($embed_pos === false) {
preg_match('~<head(\\s+[^<>]+)*>~Ui', $buffer, $match, PREG_OFFSET_CAPTURE);
$embed_pos = strlen($match[0][0]) + $match[0][1];
}
$ignore_js_files = array_map('w3_normalize_file', $ignore_js_files);
$files_to_minify = array();
$handled_scripts = array();
$script_tags = w3_extract_js2($buffer);
$previous_file_was_ignored = false;
foreach ($script_tags as $script_tag) {
$tag_pos = strpos($buffer, $script_tag);
$match = array();
preg_match('~<script\\s+[^<>]*src=["\']?([^"\']+)["\']?[^<>]*>\\s*</script>~is', $script_tag, $match);
$file = $match[1];
$file = w3_normalize_file_minify2($file);
$script_len = strlen($script_tag);
if (!$this->_filter_files($file) || in_array($file, $handled_scripts)) {
continue;
}
$handled_scripts[] = $file;
$this->replaced_scripts[] = $file;
if (in_array($file, $ignore_js_files)) {
if ($tag_pos > $embed_pos) {
if ($files_to_minify) {
$script = $this->get_script_custom($files_to_minify, $embed_type);
$buffer = substr_replace($buffer, $script, $embed_pos, 0);
$files_to_minify = array();
$script_len = $script_len + strlen($script);
}
$embed_pos = $embed_pos + $script_len;
$previous_file_was_ignored = true;
}
} else {
$buffer = substr_replace($buffer, '', $tag_pos, $script_len);
if ($embed_pos > $tag_pos) {
$embed_pos -= $script_len;
} elseif ($previous_file_was_ignored) {
$embed_pos = $tag_pos;
}
$files_to_minify[] = $file;
}
}
$script = $this->get_script_custom($files_to_minify, $embed_type);
$buffer = substr_replace($buffer, $script, $embed_pos, 0);
}
if ($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 (!$this->_filter_files($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', $embed_type);
}
}
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', $embed_type);
}
}
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', $embed_type);
}
}
}
}
if ($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 = "\n<script type=\"text/javascript\">\n" . "var extsrc=null;\n" . '(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})();' . "\n</script>\n";
$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;
}
/**
* Returns minify groups
*
* @param string $theme
* @param string $template
* @param string $type
* @return array
*/
function get_groups($theme, $template, $type)
{
$result = array();
switch ($type) {
case 'css':
$groups = $this->_config->get_array('minify.css.groups');
break;
case 'js':
$groups = $this->_config->get_array('minify.js.groups');
break;
default:
return $result;
}
if (isset($groups[$theme]['default'])) {
$locations = (array) $groups[$theme]['default'];
} else {
$locations = array();
}
if ($template != 'default' && isset($groups[$theme][$template])) {
$locations = array_merge_recursive($locations, (array) $groups[$theme][$template]);
}
foreach ($locations as $location => $config) {
if (!empty($config['files'])) {
foreach ((array) $config['files'] as $file) {
$file = w3_normalize_file_minify2($file);
if (w3_is_url($file)) {
$precached_file = $this->_precache_file($file, $type);
if ($precached_file) {
$result[$location][$file] = $precached_file;
} else {
$this->error(sprintf('Unable to cache remote file: "%s"', $file));
}
} else {
$path = w3_get_document_root() . '/' . $file;
if (file_exists($path)) {
$result[$location][$file] = '//' . $file;
} else {
$this->error(sprintf('File "%s" doesn\'t exist', $path));
}
}
}
}
}
return $result;
}
/**
* Returns custom files
*
* @param string $hash
* @param string $type
* @return array
*/
function get_custom_files($hash, $type)
{
$files = $this->uncompress_minify_files($hash, $type);
$result = array();
if ($files) {
foreach ($files as $file) {
$file = w3_normalize_file_minify2($file);
if (w3_is_url($file)) {
$precached_file = $this->_precache_file($file, $type);
if ($precached_file) {
$result[] = $precached_file;
} else {
$this->error(sprintf('Unable to cache remote file: "%s"', $file));
}
} else {
$path = w3_get_document_root() . '/' . $file;
if (file_exists($path)) {
$result[] = $file;
} else {
$this->error(sprintf('File "%s" doesn\'t exist', $path));
}
}
}
} else {
$this->error(sprintf('Unable to fetch custom files list: "%s.%s"', $hash, $type), false, 404);
}
return $result;
}
/**
* 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;
}