AlkantarClanX12
Your IP : 3.139.236.93
<?php
/**
* Smush page parser that is used by CDN and Lazy load modules.
*
* @since 3.2.2
* @package Smush\Core\Modules\Helpers
*/
namespace Smush\Core\Modules\Helpers;
use WP_Smush;
/**
* Class Parser
*/
class Parser {
/**
* CDN module status.
*
* @var bool $cdn
*/
private $cdn = false;
/**
* Lazy load module status.
*
* @var bool $lazy_load
*/
private $lazy_load = false;
/**
* Process background images.
*
* @since 3.2.2
* @var bool $background_images
*/
private $background_images = false;
/**
* Smush will __construct this class multiple times, but only once does it need to be initialized.
*
* @since 3.5.0 Moved from __construct().
*/
public function init() {
if ( is_admin() || is_customize_preview() ) {
return;
}
if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
return;
}
if ( defined( 'DOING_CRON' ) && DOING_CRON ) {
return;
}
if ( $this->is_page_builder() ) {
return;
}
if ( $this->is_smartcrawl_analysis() ) {
return;
}
// Start an output buffer before any output starts.
add_action(
'template_redirect',
function () {
ob_start( array( $this, 'parse_page' ) );
},
1
);
}
/**
* Enable parser for selected module.
*
* @since 3.2.2
* @param string $module Module ID.
*/
public function enable( $module ) {
if ( ! in_array( $module, array( 'cdn', 'lazy_load', 'iframes', 'background_images' ), true ) ) {
return;
}
$this->$module = true;
}
/**
* Disable parser for selected module.
*
* @since 3.2.2
* @param string $module Module ID.
*/
public function disable( $module ) {
if ( ! in_array( $module, array( 'cdn', 'lazy_load' ), true ) ) {
return;
}
$this->$module = false;
}
/**
* Process images from current buffer content.
*
* Use DOMDocument class to find all available images in current HTML content and set attachment ID attribute.
*
* @since 3.0
* @since 3.2.2 Moved from \Smush\Core\Modules\CDN.
*
* @param string $content Current buffer content.
*
* @return string
*/
public function parse_page( $content ) {
// Do not parse page if CDN and Lazy load modules are disabled.
if ( ! $this->cdn && ! $this->lazy_load ) {
return $content;
}
if ( is_customize_preview() ) {
return $content;
}
if ( empty( $content ) ) {
return $content;
}
$content = $this->process_images( $content );
if ( $this->background_images ) {
$content = $this->process_background_images( $content );
}
return $content;
}
/**
* Process all images within <img> tags.
*
* @since 3.2.2
*
* @param string $content Current buffer content.
*
* @return string
*/
private function process_images( $content ) {
$images = $this->get_images_from_content( $content );
if ( empty( $images ) ) {
return $content;
}
foreach ( $images[0] as $key => $image ) {
$img_src = $images['src'][ $key ];
$new_image = $image;
// Update the image with correct CDN links.
if ( $this->cdn ) {
$new_image = WP_Smush::get_instance()->core()->mod->cdn->parse_image( $img_src, $new_image, $images['srcset'][ $key ], $images['type'][ $key ] );
}
/**
* Internal filter to disable page parsing.
*
* Because the page parser module is universal, we need to make sure that all modules have the ability to skip
* parsing of certain pages. For example, lazy loading should skip if_preview() pages. In order to achieve this
* functionality, I've introduced this filter. Filter priority can be used to overwrite the $skip param.
*
* @since 3.2.2
*
* @param bool $skip Skip status.
*/
if ( $this->lazy_load && ! apply_filters( 'wp_smush_should_skip_parse', false ) ) {
$new_image = WP_Smush::get_instance()->core()->mod->lazy->parse_image( $img_src, $new_image, $images['type'][ $key ] );
}
$content = str_replace( $image, $new_image, $content );
}
return $content;
}
/**
* Process all images that are contained as background-images.
*
* @since 3.2.2
*
* @param string $content Current buffer content.
*
* @return string
*/
private function process_background_images( $content ) {
$images = self::get_background_images( $content );
if ( empty( $images ) ) {
return $content;
}
// Try to sort out the duplicate entries.
$elements = array_unique( $images[0] );
$urls = array_unique( $images['img_url'] );
if ( count( $elements ) === count( $urls ) ) {
$images[0] = $elements;
$images['img_url'] = $urls;
}
foreach ( $images[0] as $key => $image ) {
$img_src = $images['img_url'][ $key ];
$new_image = $image;
// Update the image with correct CDN links.
$new_image = WP_Smush::get_instance()->core()->mod->cdn->parse_background_image( $img_src, $new_image );
$content = str_replace( $image, $new_image, $content );
}
return $content;
}
/**
* Compatibility with SmartCrawl readability analysis.
* Do not process page on analysis.
*
* @since 3.3.0
*/
private function is_smartcrawl_analysis() {
$wds_analysis = filter_input( INPUT_POST, 'action', FILTER_SANITIZE_STRING );
if ( ! is_null( $wds_analysis ) && 'wds-analysis-recheck' === $wds_analysis ) {
return true;
}
if ( null !== filter_input( INPUT_GET, 'wds-frontend-check', FILTER_SANITIZE_STRING ) ) {
return true;
}
return false;
}
/**
* Get image tags from page content.
*
* @since 3.1.0
* @since 3.2.0 Moved to WP_Smush_Content from \Smush\Core\Modules\CDN
* @since 3.2.2 Moved to Parser from WP_Smush_Content
*
* Performance test: auto generated page with ~900 lines of HTML code, 84 images.
* - Smush 2.4.0: 82 matches, 104359 steps (~80 ms) <- does not match <source> images in <picture>.
* - Smush 2.5.0: 84 matches, 63791 steps (~51 ms).
*
* @param string $content Page content.
*
* @return array
*/
public function get_images_from_content( $content ) {
$images = array();
/**
* Filter out only <body> content. As this was causing issues with escaped JS strings in <head>.
*
* @since 3.6.2
*/
if ( preg_match( '/(?=<body).*<\/body>/is', $content, $body ) ) {
$content = $body[0];
}
if ( preg_match_all( '/<(?P<type>img|source|iframe)\b(?>\s+(?:src=[\'"](?P<src>[^\'"]*)[\'"]|srcset=[\'"](?P<srcset>[^\'"]*)[\'"])|[^\s>]+|\s+)*>/is', $content, $images ) ) {
foreach ( $images as $key => $unused ) {
// Simplify the output as much as possible, mostly for confirming test results.
if ( is_numeric( $key ) && $key > 0 ) {
unset( $images[ $key ] );
}
}
}
return $images;
}
/**
* Get background images from content.
*
* @since 3.2.2
*
* Performance test: auto generated page with ~900 lines of HTML code, 84 images (only 1 with background image).
* - Smush 2.4.0: 1 match, 522510 steps (~355 ms)
* - Smush 2.5.0: 1 match, 12611 steps, (~12 ms)
*
* @param string $content Page content.
*
* @return array
*/
private static function get_background_images( $content ) {
$images = array();
if ( preg_match_all( '/(?:background-image:\s*?url\(\s*[\'"]?(?P<img_url>.*?[^)\'"]+)[\'"]?\s*\))/i', $content, $images ) ) {
foreach ( $images as $key => $unused ) {
// Simplify the output as much as possible, mostly for confirming test results.
if ( is_numeric( $key ) && $key > 0 ) {
unset( $images[ $key ] );
}
}
}
/**
* Make sure that the image doesn't start and end with ".
*
* @since 3.5.0
*/
$images['img_url'] = array_map(
function ( $image ) {
// Quote entities.
$quotes = apply_filters( 'wp_smush_background_image_quotes', array( '"', '"', ''', ''' ) );
$image = trim( $image );
// Remove the starting quotes.
if ( in_array( substr( $image, 0, 6 ), $quotes, true ) ) {
$image = substr( $image, 6 );
}
// Remove the ending quotes.
if ( in_array( substr( $image, -6 ), $quotes, true ) ) {
$image = substr( $image, 0, -6 );
}
return $image;
},
$images['img_url']
);
return $images;
}
/**
* Check if this is one of the known page builders.
*
* @since 3.5.1
*
* @return bool
*/
private function is_page_builder() {
// Oxygen builder.
if ( defined( 'SHOW_CT_BUILDER' ) && SHOW_CT_BUILDER ) {
return true;
}
// Oxygen builder as well.
if ( null !== filter_input( INPUT_GET, 'ct_builder' ) ) {
return true;
}
// Beaver builder.
if ( null !== filter_input( INPUT_GET, 'fl_builder' ) ) {
return true;
}
// Thrive Architect Builder.
if ( null !== filter_input( INPUT_GET, 'tve' ) && null !== filter_input( INPUT_GET, 'tcbf' ) ) {
return true;
}
// Tatsu page builder.
if ( null !== filter_input( INPUT_GET, 'tatsu' ) ) {
return true;
}
return false;
}
/**
* Add attribute to selected tag.
*
* @since 3.1.0
* @since 3.2.0 Moved to WP_Smush_Content from \Smush\Core\Modules\CDN
* @since 3.2.2 Moved to Parser from WP_Smush_Content
*
* @param string $element Image element.
* @param string $name Img attribute name (srcset, size, etc).
* @param string $value Attribute value.
*/
public static function add_attribute( &$element, $name, $value = null ) {
$closing = false === strpos( $element, '/>' ) ? '>' : ' />';
$quotes = false === strpos( $element, '"' ) ? '\'' : '"';
if ( ! is_null( $value ) ) {
$element = rtrim( $element, $closing ) . " {$name}={$quotes}{$value}{$quotes}{$closing}";
} else {
$element = rtrim( $element, $closing ) . " {$name}{$closing}";
}
}
/**
* Get attribute from an HTML element.
*
* @since 3.2.0
* @since 3.2.2 Moved to Parser from WP_Smush_Content
*
* @param string $element HTML element.
* @param string $name Attribute name.
*
* @return string
*/
public static function get_attribute( $element, $name ) {
preg_match( "/{$name}=['\"]([^'\"]+)['\"]/is", $element, $value );
return isset( $value['1'] ) ? $value['1'] : '';
}
/**
* Remove attribute from selected tag.
*
* @since 3.2.0
* @since 3.2.2 Moved to Parser from WP_Smush_Content
*
* @param string $element Image element.
* @param string $attribute Img attribute name (srcset, size, etc).
*/
public static function remove_attribute( &$element, $attribute ) {
$element = preg_replace( '/' . $attribute . '=[\'"](.*?)[\'"]/i', '', $element );
}
/**
* Get URLs from a string of content.
*
* This is mostly used to get the URLs from srcset and parse each single URL to use in CDN.
*
* Performance test: auto generated page with ~900 lines of HTML code, 84 images
* - Smush 2.4.0: 11957 matches, 237227 steps (~169 ms) <- many false positive matches.
* - Smush 2.5.0: 278 matches, 14509 steps, (~15 ms).
*
* @since 3.3.0
*
* @param string $content Content.
*
* @return array
*/
public static function get_links_from_content( $content ) {
$images = array();
preg_match_all( '/(?:https?[^\s\'"]*)/is', $content, $images );
return $images;
}
}