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<?php
/**
* The7 Less compiler.
*
* @package The7
*/
defined( 'ABSPATH' ) || exit;
/**
* Class The7_Less_Compiler
*/
class The7_Less_Compiler {
/**
* Less compiler.
*
* @var The7\Vendor\Lessphp\Compiler Less compiler.
*/
protected $lessc;
/**
* The7_Less_Compiler constructor.
*
* @param array $less_vars Less vars array.
* @param array|null $import_dir Import dir.
*
* @throws Exception Throws Exception if WP Filesystem is not accessible.
*/
public function __construct( $less_vars = array(), $import_dir = null ) {
global $wp_filesystem;
if ( ! function_exists( 'WP_Filesystem' ) ) {
require_once ABSPATH . 'wp-admin/includes/file.php';
}
$wp_upload = wp_get_upload_dir();
if ( ! $wp_filesystem && ! WP_Filesystem( false, $wp_upload['basedir'] ) ) {
throw new Exception( __( 'Cannot access file system.', 'the7mk2' ) );
}
$this->lessc = new The7\Vendor\Lessphp\Compiler();
// Register custom less functions.
The7_Less_Functions::register_functions( $this->lessc );
if ( $import_dir === null ) {
$import_dir = array( PRESSCORE_THEME_DIR . '/css', PRESSCORE_THEME_DIR . '/css/dynamic-less' );
}
$this->lessc->setImportDir( $import_dir );
$this->lessc->setVariables( $less_vars );
}
/**
* Proxy for the7_lessc->setImportDir.
*
* @since 8.3.0
*
* @param $import_dir
*/
public function set_import_dir( $import_dir ) {
$this->lessc->setImportDir( $import_dir );
}
/**
* Proxy for the7_lessc->setVariables.
*
* @since 8.3.0
*
* @param $less_vars
*/
public function set_variables( $less_vars ) {
$this->lessc->setVariables( $less_vars );
}
/**
* Compile less to css.
*
* @param string $source_file Source file.
* @param string $output_file Output file.
* @param array $imports Imports.
*/
public function compile_to_file( $source_file, $output_file, $imports = array() ) {
$css = $this->compile_file( $source_file, $imports );
$css = $this->make_relative_urls( $css, $source_file, $output_file );
$this->put_contents( $output_file, $css );
}
/**
* Compile less file.
*
* @param string $less_file Less file.
* @param array $imports Imports.
*
* @return false|string
*/
public function compile_file( $less_file, $imports = array() ) {
$less = $this->get_file_contents( $less_file );
return $this->compile( $less, $imports );
}
/**
* Compile less code.
*
* @param string $less Less code.
* @param array $imports Imports.
*
* @return false|string
*/
public function compile( $less, $imports = array() ) {
if ( $imports ) {
$imports = array_filter( (array) $imports );
$import_anchors = array();
$import_statements = array();
foreach ( $imports as $import_anchor => $import_files ) {
$import_anchors[] = '// ' . strtoupper( $import_anchor );
$import_statements[] = array_reduce(
(array) $import_files,
array( $this, 'reduce_dynamic_imports' )
);
}
$less = str_replace(
$import_anchors,
$import_statements,
$less
);
}
return $this->lessc->compile( $less );
}
/**
* Return file contents.
*
* @global WP_Filesystem_Base $wp_filesystem
*
* @param string $source_file Source file.
*
* @return string|false Read data on success, false on failure.
*/
public function get_file_contents( $source_file ) {
/**
* WP Filesystem global.
*
* @var WP_Filesystem_Base $wp_filesystem
*/
global $wp_filesystem;
return $wp_filesystem->get_contents( $source_file );
}
/**
* Determine that $abspath is writable.
*
* @param string $abspath Absolute path.
*
* @return bool
*/
public function is_writable( $abspath ) {
global $wp_filesystem;
return $wp_filesystem->is_writable( $abspath );
}
/**
* Meant to internal usage. Reduce import files array to import statements string.
*
* @param string $cary Import statements string.
* @param string $file Import file.
*
* @return string
*/
public function reduce_dynamic_imports( $cary, $file ) {
$file = (string) $file;
return "$cary\n@import \"{$file}\";";
}
/**
* Create/overwrite $output_file file with $content.
*
* @global WP_Filesystem_Base $wp_filesystem
*
* @param string $output_file Output file.
* @param string $content Content.
*/
public function put_contents( $output_file, $content ) {
/**
* WP Filesystem global.
*
* @var WP_Filesystem_Base $wp_filesystem
*/
global $wp_filesystem;
wp_mkdir_p( dirname( $output_file ) );
$wp_filesystem->put_contents( $output_file, $content );
}
/**
* Make relative urls.
*
* @param string $css CSS.
* @param string $source_file Source file.
* @param string $output_file Output file.
*
* @return string
*/
protected function make_relative_urls( $css, $source_file, $output_file ) {
$url_filter = new The7_Relative_Url_Filter( $source_file, $output_file );
$css = preg_replace_callback(
'#url\s*\((?P<quote>[\'"]{0,1})(?P<url>[^\'"\)]+)\1\)#siU',
array( $url_filter, 'filter' ),
$css
);
return $css;
}
public function get_lessc( ) {
return $this->lessc;
}
}
class The7_Relative_Url_Filter {
protected $path_from_uploads_to_wp_root;
protected $path_from_wp_root_to_theme;
public function __construct( $source_file, $output_file ) {
$wp_upload_dir = wp_get_upload_dir();
$content_relative_path = str_replace( $wp_upload_dir['basedir'], $wp_upload_dir['baseurl'], dirname( $output_file ) );
$content_relative_path = str_replace( trailingslashit( site_url() ), '', $content_relative_path );
$this->path_from_uploads_to_wp_root = implode( '/', array_fill( 0, count( explode( '/', $content_relative_path ) ), '..' ) );
$this->path_from_wp_root_to_theme = str_replace( ABSPATH, '', dirname( $source_file ) );
}
public function filter( $matches ) {
if ( preg_match( '#^(http|@|data:|/)#Ui', $matches[2] ) ) {
return str_replace( site_url(), $this->path_from_uploads_to_wp_root, $matches[0] );
}
return sprintf( 'url(%s%s%1$s)', $matches[1], "{$this->path_from_uploads_to_wp_root}/{$this->path_from_wp_root_to_theme}/{$matches[2]}" );
}
}