<?php

/**

* asset_cache

*

* @package Semiologic Cache

**/

class asset_cache {

/**

* wp_print_styles()

*

* @return void

**/

static function wp_print_styles() {

} # wp_print_styles()

/**

* process_styles()

*

* @return void

**/

static function process_styles() {

} # process_styles()

/**

* concat_styles()

*

* @param string $file

* @param array $handles

* @return void

**/

static function concat_styles($file, $handles) {

global $wp_styles;

$css = array();

foreach ( $handles as $handle ) {

$src = $wp_styles->registered[$handle]->src;

if ( substr($src, 0, 1) == '/' ) {

$base = site_url() . $src;

$src = ABSPATH . ltrim($src, '/');

} else {

$base = $src;

$src = str_replace(

array(plugins_url(), content_url()),

array(WP_PLUGIN_DIR, WP_CONTENT_DIR),

$src

);

}

$css[$base] = self::strip_bom(file_get_contents($src));

}

foreach ( $css as $base => &$style ) {

$base = dirname($base) . '/';

$style = preg_replace("{url\s*\(\s*([\"']?)(?![\"']?https?://)(?:\./)?(.+?)\\1\s*\)}i", "url($1$base$2$1)", $style);

$style = self::compress_css( $style );

}

cache_fs::put_contents($file, implode("\n\n", $css));

} # concat_styles()

/**

* compress_css()

*

* @param string $buffer

* @return string

**/

static function compress_css( $buffer ) {

// compress crlf

$buffer = str_replace("\r\n", "\n", $buffer);

// Normalize whitespace

$buffer = preg_replace( '/\s+/', ' ', $buffer );

// remove comments

$buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer);

// remove ws around { } and last semicolon in declaration block

$buffer = preg_replace('/\\s*{\\s*/', '{', $buffer);

$buffer = preg_replace('/;?\\s*}\\s*/', '}', $buffer);

// remove ws surrounding semicolons

$buffer = preg_replace('/\\s*;\\s*/', ';', $buffer);

// remove ws between rules and colons

$buffer = preg_replace('/

\\s*

([{;]) # 1 = beginning of block or rule separator

\\s*

([\\*_]?[\\w\\-]+) # 2 = property (and maybe IE filter)

\\s*

:

\\s*

(\\b|[#\'"]) # 3 = first character of a value

/x', '$1$2:$3', $buffer);

// Strip leading 0 on decimal values (converts 0.5px into .5px)

$buffer = preg_replace( '/(:| )0\.([0-9]+)(%|em|ex|px|in|cm|mm|pt|pc)/i', '${1}.${2}${3}', $buffer );

// Strip units if value is 0 (converts 0px to 0)

$buffer = preg_replace( '/(:| )(\.?)0(%|em|ex|px|in|cm|mm|pt|pc)/i', '${1}0', $buffer );

// Convert all zeros value into short-hand

$buffer = preg_replace( '/0 0 0 0/', '0', $buffer );

// minimize hex colors

$buffer = preg_replace('/([^=])#([a-f\\d])\\2([a-f\\d])\\3([a-f\\d])\\4([\\s;\\}])/i'

, '$1#$2$3$4$5', $buffer);

// replace any ws involving newlines with a single newline

$buffer= preg_replace('/[ \\t]*\\n+\\s*/', "\n", $buffer);

// separate common descendent selectors w/ newlines (to limit line lengths)

$buffer = preg_replace('/([\\w#\\.\\*]+)\\s+([\\w#\\.\\*]+){/', "$1\n$2{", $buffer);

return trim($buffer);

} # compress_css

/**

* wp_print_scripts()

*

* @return void

**/

static function wp_print_scripts() {

static $scripts_done = false;

if ( $scripts_done )

return;

$scripts_done = true;

asset_cache::process_scripts( true );

} # wp_print_scripts()

/**

* wp_print_footer_scripts()

*

* @return void

**/

static function wp_print_footer_scripts() {

static $footer_scripts_done = false;

if ( $footer_scripts_done )

return;

$footer_scripts_done = true;

asset_cache::process_scripts( false );

} # wp_print_footer_scripts()

/**

* process_scripts()

*

* @param bool $header_scripts

* @return void

**/

static function process_scripts( $header_scripts = true ) {

global $wp_scripts;

if ( !( $wp_scripts instanceof WP_Scripts ) )

$wp_scripts = new WP_Scripts;

$queue = $wp_scripts->queue;

$wp_scripts->all_deps($queue);

if ( !$wp_scripts->to_do )

return;

$todo = array();

$js = array();

$dirs = array( content_url(), plugins_url(), site_url () . '/wp-includes/js' );

// we need to put the header scripts first though

if ( !$header_scripts ) {

$header_scripts_key = array_search( 'scripts-concat', $wp_scripts->to_do );

if ( $header_scripts_key !== FALSE ) {

$header_concat = $wp_scripts->to_do[$header_scripts_key];

unset( $wp_scripts->to_do[$header_scripts_key] );

$wp_scripts->to_do = array( 0 => $header_concat ) + $wp_scripts->to_do;

}

}

foreach ( $wp_scripts->to_do as $key => $handle ) {

if ( !empty($wp_scripts->registered[$handle]->args) )

continue;

// bail if is a footer script and we're doing headers

if ( $header_scripts && $wp_scripts->groups[$handle] > 0 )

continue;

// if it is conditionally loaded let's ignore those

if (isset($wp_scripts->registered[$handle]->extra["conditional"]))

continue;

$jsPath = $wp_scripts->registered[$handle]->src;

// bail if alias

if ( ! $jsPath ) {

continue;

}

if ( !asset_cache::startsWith( $jsPath, site_url() ) )

$jsPath = site_url() . $jsPath;

$inDir = false;

foreach ( $dirs as $dir ) {

if (asset_cache::startsWith( $jsPath, $dir ) ) {

$inDir = true;

break;

}

}

$suffixMatch = asset_cache::endsWith( $jsPath, ".js" );

if ( $inDir && $suffixMatch ) {

$js[$handle] = $wp_scripts->registered[$handle]->ver;

$todo[] = $handle;

unset( $wp_scripts->to_do[$key]);

$wp_scripts->done[] = $handle;

}

}

if ( $todo ) {

$file = '/assets/' . md5(serialize($js)) . '.js';

if ( !cache_fs::exists($file) )

asset_cache::concat_scripts($file, $todo);

$extra = asset_cache::concat_extra( $todo );

$wp_scripts->default_version = null;

if ( $header_scripts ) {

wp_enqueue_script('scripts-concat', content_url() . '/cache' . $file );

// wp_enqueue_script( 'scripts-concat', content_url() . '/cache' . $file, array(), false, true );

if ( $extra )

$wp_scripts->registered['scripts-concat']->add_data( 'data', $extra );

}

else {

wp_enqueue_script('footer-scripts-concat', content_url() . '/cache' . $file, array('scripts-concat'), false, true);

$wp_scripts->groups['footer-scripts-concat'] = 1;

$wp_scripts->in_footer[] = 'footer-scripts-concat';

if ( $extra )

$wp_scripts->registered['footer-scripts-concat']->add_data( 'data', $extra );

}

}

$wp_scripts->do_concat = true;

( $header_scripts ) ? $wp_scripts->do_head_items() : $wp_scripts->do_footer_items();

if ( $wp_scripts->print_code ) {

echo "<script type='text/javascript'>\n";

echo "/* <![CDATA[ */\n";

echo $wp_scripts->print_code;

echo "/* ]]> */\n";

echo "</script>\n";

}

// $wp_scripts->reset();

}

/**

* make_script_defer()

*

* @param $tag

* @param $handle

* @param $src

*

* @return string

*/

static function make_script_defer( $tag, $handle, $src ) {

// if ( 'footer_scripts_concat' != $handle ) {

// return $tag;

// }

return str_replace( ' src', ' defer src', $tag );

}

/**

* concat_scripts()

*

* @param string $file

* @param array $handles

* @return void

**/

static function concat_scripts($file, $handles) {

global $wp_scripts;

$js = array();

foreach ( $handles as $handle ) {

$src = $wp_scripts->registered[$handle]->src;

if ( substr($src, 0, 1) == '/' ) {

$src = ABSPATH . ltrim($src, '/');

} else {

$src = str_replace(

array(plugins_url(), content_url()),

array(WP_PLUGIN_DIR, WP_CONTENT_DIR),

$src

);

}

$script = self::strip_bom(file_get_contents($src));

$js[] = self::compress_js( $script );

}

cache_fs::put_contents($file, implode("\n\n", $js));

} # concat_scripts()

/**

* compress_js()

*

* @param string $buffer

* @return string

**/

static function compress_js( $buffer ) {

return $buffer;

/* remove tabs, spaces, newlines, etc. */

$buffer = str_replace(array("\r\n","\r","\t","\n",' ',' ',' '), '', $buffer);

/* remove other spaces before/after ) */

$buffer = preg_replace(array('(( )+\))','(\)( )+)'), ')', $buffer);

return $buffer;

} # compress_js

/**

* strip_bom()

*

* @param string $str

* @return string $str

**/

static function strip_bom($str) {

if ( preg_match('{^\x0\x0\xFE\xFF}', $str) ) {

# UTF-32 Big Endian BOM

$str = substr($str, 4);

} elseif ( preg_match('{^\xFF\xFE\x0\x0}', $str) ) {

# UTF-32 Little Endian BOM

$str = substr($str, 4);

} elseif ( preg_match('{^\xFE\xFF}', $str) ) {

# UTF-16 Big Endian BOM

$str = substr($str, 2);

} elseif ( preg_match('{^\xFF\xFE}', $str) ) {

# UTF-16 Little Endian BOM

$str = substr($str, 2);

} elseif ( preg_match('{^\xEF\xBB\xBF}', $str) ) {

# UTF-8 BOM

$str = substr($str, 3);

}

return $str;

} # strip_bom()

/**

* concat_extra()

*

* @param array $handles

*

* @return string

**/

static function concat_extra( $handles ) {

global $wp_scripts;

$extra = '';

foreach ( $handles as $handle ) {

if ( isset( $wp_scripts->registered[$handle]->extra['data'] ) )

$extra .= $wp_scripts->registered[$handle]->extra['data'];

}

return $extra;

} # concat_scripts()

/**

* startsWith()

*

* @param string $str

* @return string $str

**/

static function startsWith($haystack, $needle)

{

$length = strlen($needle);

return (substr($haystack, 0, $length) === $needle);

}

/**

* endsWith()

*

* @param string $str

* @return string $str

**/

static function endsWith($haystack, $needle)

{

$length = strlen($needle);

if ($length == 0) {

return true;

}

return (substr($haystack, -$length) === $needle);

}

} # asset_cache

if ( !SCRIPT_DEBUG ) {

add_filter('wp_print_scripts', array('asset_cache', 'wp_print_scripts'), 1000000);

add_filter('wp_print_footer_scripts', array('asset_cache', 'wp_print_footer_scripts'), 9);

// add_filter('script_loader_tag', array('asset_cache', 'make_script_defer'), 10 , 3);

}

if ( !sem_css_debug ) {

add_filter('wp_print_styles', array('asset_cache', 'wp_print_styles'), 1000000);

}