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<?php
/**
* CSS `@import` node
*
* The general strategy here is that we don't want to wait
* for the parsing to be completed, before we start importing
* the file. That's because in the context of a browser,
* most of the time will be spent waiting for the server to respond.
*
* On creation, we push the import path to our import queue, though
* `import,push`, we also pass it a callback, which it'll call once
* the file has been fetched, and parsed.
*
* @private
*/
class Less_Tree_Import extends Less_Tree {
public $options;
public $index;
public $path;
public $features;
public $currentFileInfo;
public $css;
public $skip;
public $root;
public $type = 'Import';
public function __construct( $path, $features, $options, $index, $currentFileInfo = null ) {
$this->options = $options;
$this->index = $index;
$this->path = $path;
$this->features = $features;
$this->currentFileInfo = $currentFileInfo;
if ( is_array( $options ) ) {
$this->options += [ 'inline' => false ];
if ( isset( $this->options['less'] ) || $this->options['inline'] ) {
$this->css = !isset( $this->options['less'] ) || !$this->options['less'] || $this->options['inline'];
} else {
$pathValue = $this->getPath();
// Leave any ".css" file imports as literals for the browser.
// Also leave any remote HTTP resources as literals regardless of whether
// they contain ".css" in their filename.
if ( $pathValue && preg_match( '/^(https?:)?\/\/|\.css$/i', $pathValue ) ) {
$this->css = true;
}
}
}
}
//
// The actual import node doesn't return anything, when converted to CSS.
// The reason is that it's used at the evaluation stage, so that the rules
// it imports can be treated like any other rules.
//
// In `eval`, we make sure all Import nodes get evaluated, recursively, so
// we end up with a flat structure, which can easily be imported in the parent
// ruleset.
//
public function accept( $visitor ) {
if ( $this->features ) {
$this->features = $visitor->visitObj( $this->features );
}
$this->path = $visitor->visitObj( $this->path );
if ( !$this->options['inline'] && $this->root ) {
$this->root = $visitor->visit( $this->root );
}
}
/**
* @see Less_Tree::genCSS
*/
public function genCSS( $output ) {
if ( $this->css ) {
$output->add( '@import ', $this->currentFileInfo, $this->index );
$this->path->genCSS( $output );
if ( $this->features ) {
$output->add( ' ' );
$this->features->genCSS( $output );
}
$output->add( ';' );
}
}
public function toCSS() {
$features = $this->features ? ' ' . $this->features->toCSS() : '';
if ( $this->css ) {
return "@import " . $this->path->toCSS() . $features . ";\n";
} else {
return "";
}
}
/**
* @return string|null
*/
public function getPath() {
if ( $this->path instanceof Less_Tree_Quoted ) {
$path = $this->path->value;
$path = ( isset( $this->css ) || preg_match( '/(\.[a-z]*$)|([\?;].*)$/', $path ) ) ? $path : $path . '.less';
// During the first pass, Less_Tree_URL may contain a Less_Tree_Variable (not yet expanded),
// and thus has no value property defined yet. Return null until we reach the next phase.
// https://github.com/wikimedia/less.php/issues/29
} elseif ( $this->path instanceof Less_Tree_URL && !( $this->path->value instanceof Less_Tree_Variable ) ) {
$path = $this->path->value->value;
} else {
return null;
}
// remove query string and fragment
return preg_replace( '/[\?#][^\?]*$/', '', $path );
}
public function compileForImport( $env ) {
return new Less_Tree_Import( $this->path->compile( $env ), $this->features, $this->options, $this->index, $this->currentFileInfo );
}
public function compilePath( $env ) {
$path = $this->path->compile( $env );
$rootpath = '';
if ( $this->currentFileInfo && $this->currentFileInfo['rootpath'] ) {
$rootpath = $this->currentFileInfo['rootpath'];
}
if ( !( $path instanceof Less_Tree_URL ) ) {
if ( $rootpath ) {
$pathValue = $path->value;
// Add the base path if the import is relative
if ( $pathValue && Less_Environment::isPathRelative( $pathValue ) ) {
$path->value = $this->currentFileInfo['uri_root'] . $pathValue;
}
}
$path->value = Less_Environment::normalizePath( $path->value );
}
return $path;
}
public function compile( $env ) {
$evald = $this->compileForImport( $env );
// get path & uri
$path_and_uri = null;
if ( is_callable( Less_Parser::$options['import_callback'] ) ) {
$path_and_uri = call_user_func( Less_Parser::$options['import_callback'], $evald );
}
if ( !$path_and_uri ) {
$path_and_uri = $evald->PathAndUri();
}
if ( $path_and_uri ) {
list( $full_path, $uri ) = $path_and_uri;
} else {
$full_path = $uri = $evald->getPath();
}
// import once
if ( $evald->skip( $full_path, $env ) ) {
return [];
}
'@phan-var string $full_path';
if ( $this->options['inline'] ) {
// todo needs to reference css file not import
//$contents = new Less_Tree_Anonymous($this->root, 0, array('filename'=>$this->importedFilename), true );
Less_Parser::AddParsedFile( $full_path );
$contents = new Less_Tree_Anonymous( file_get_contents( $full_path ), 0, [], true );
if ( $this->features ) {
return new Less_Tree_Media( [ $contents ], $this->features->value );
}
return [ $contents ];
}
// optional (need to be before "CSS" to support optional CSS imports. CSS should be checked only if empty($this->currentFileInfo))
if ( isset( $this->options['optional'] ) && $this->options['optional'] && !file_exists( $full_path ) && ( !$evald->css || !empty( $this->currentFileInfo ) ) ) {
return [];
}
// css ?
if ( $evald->css ) {
$features = ( $evald->features ? $evald->features->compile( $env ) : null );
return new Less_Tree_Import( $this->compilePath( $env ), $features, $this->options, $this->index );
}
return $this->ParseImport( $full_path, $uri, $env );
}
/**
* Using the import directories, get the full absolute path and uri of the import
*/
public function PathAndUri() {
$evald_path = $this->getPath();
if ( $evald_path ) {
$import_dirs = [];
if ( Less_Environment::isPathRelative( $evald_path ) ) {
// if the path is relative, the file should be in the current directory
if ( $this->currentFileInfo ) {
$import_dirs[ $this->currentFileInfo['currentDirectory'] ] = $this->currentFileInfo['uri_root'];
}
} else {
// otherwise, the file should be relative to the server root
if ( $this->currentFileInfo ) {
$import_dirs[ $this->currentFileInfo['entryPath'] ] = $this->currentFileInfo['entryUri'];
}
// if the user supplied entryPath isn't the actual root
$import_dirs[ $_SERVER['DOCUMENT_ROOT'] ] = '';
}
// always look in user supplied import directories
$import_dirs = array_merge( $import_dirs, Less_Parser::$options['import_dirs'] );
foreach ( $import_dirs as $rootpath => $rooturi ) {
if ( is_callable( $rooturi ) ) {
list( $path, $uri ) = call_user_func( $rooturi, $evald_path );
if ( is_string( $path ) ) {
$full_path = $path;
return [ $full_path, $uri ];
}
} elseif ( !empty( $rootpath ) ) {
$path = rtrim( $rootpath, '/\\' ) . '/' . ltrim( $evald_path, '/\\' );
if ( file_exists( $path ) ) {
$full_path = Less_Environment::normalizePath( $path );
$uri = Less_Environment::normalizePath( dirname( $rooturi . $evald_path ) );
return [ $full_path, $uri ];
} elseif ( file_exists( $path . '.less' ) ) {
$full_path = Less_Environment::normalizePath( $path . '.less' );
$uri = Less_Environment::normalizePath( dirname( $rooturi . $evald_path . '.less' ) );
return [ $full_path, $uri ];
}
}
}
}
}
/**
* Parse the import url and return the rules
*
* @param string $full_path
* @param string|null $uri
* @param mixed $env
* @return Less_Tree_Media|array
*/
public function ParseImport( $full_path, $uri, $env ) {
$import_env = clone $env;
if ( ( isset( $this->options['reference'] ) && $this->options['reference'] ) || isset( $this->currentFileInfo['reference'] ) ) {
$import_env->currentFileInfo['reference'] = true;
}
if ( ( isset( $this->options['multiple'] ) && $this->options['multiple'] ) ) {
$import_env->importMultiple = true;
}
$parser = new Less_Parser( $import_env );
$root = $parser->parseFile( $full_path, $uri, true );
$ruleset = new Less_Tree_Ruleset( null, $root->rules );
$ruleset->evalImports( $import_env );
return $this->features ? new Less_Tree_Media( $ruleset->rules, $this->features->value ) : $ruleset->rules;
}
/**
* Should the import be skipped?
*
* @param string|null $path
* @param Less_Environment $env
* @return bool|null
*/
private function skip( $path, $env ) {
$path = Less_Parser::AbsPath( $path, true );
if ( $path && Less_Parser::FileParsed( $path ) ) {
if ( isset( $this->currentFileInfo['reference'] ) ) {
return true;
}
return !isset( $this->options['multiple'] ) && !$env->importMultiple;
}
}
}