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TexUtil.php
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TexUtil.php
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<?php
declare( strict_types = 1 );
namespace MediaWiki\Extension\Math\WikiTexVC;
use InvalidArgumentException;
/**
* @method false|mixed callback(string $getArg)
* @method false|mixed is_literal(string $litArg)
* @method false|mixed latex_function_names(string $getArg)
* @method false|mixed nullary_macro(string $litArg)
* @method false|mixed operator(string $getArg)
* @method false|mixed cancel_required(string $getArg)
* @method false|mixed nullary_macro_in_mbox(string $getArg)
* @method false|mixed unicode_char(string $getArg)
* @method false|mixed identifier(string $getArg)
* @method false|mixed delimiter(string $getArg)
* @method false|string mathchar(string $getArg)
* @method false|string color(string $getArg)
*/
class TexUtil {
/** @var self|null */
private static $instance = null;
/** @var array<string,true> */
private $allFunctions;
/** @var array[] */
private $baseElements;
/**
* Loads the file texutil.json
* allFunctions holds the root-level function keys
* other objects are second level elements and hold all functions which are assigned to this second level elements
*/
private function __construct() {
$jsonContent = $this->getJSON();
// dynamically create functions from the content
$this->allFunctions = [];
$this->baseElements = [];
$this->allFunctions["\\begin"] = true;
$this->allFunctions["\\end"] = true;
foreach ( $jsonContent as $key => $value ) {
// Adding all basic elements as functions
foreach ( $value as $elementKey => $element ) {
if ( !array_key_exists( $elementKey, $this->baseElements ) ) {
$this->baseElements[$elementKey] = [];
$this->baseElements[$elementKey][$key] = $element;
} else {
if ( !array_key_exists( $key, $this->baseElements[$elementKey] ) ) {
$this->baseElements[$elementKey][$key] = $element;
}
}
}
// Adding function to all functions
$this->allFunctions[$key] = true;
}
}
public static function removeInstance() {
self::$instance = null;
}
public static function getInstance(): TexUtil {
if ( self::$instance == null ) {
self::$instance = new TexUtil();
}
return self::$instance;
}
/**
* Returning the base elements array.
* This is only used for testing in TexUtilTest.php.
* @return array
*/
public function getBaseElements() {
return $this->baseElements;
}
/**
* Getting an element by key in allFunctions.
* If the key is defined, return true if not false.
* @param string $key string to check in allFunctions
* @return bool
*/
public function getAllFunctionsAt( string $key ) {
if ( array_key_exists( $key, $this->allFunctions ) ) {
return true;
} else {
return false;
}
}
/**
* Allows to directly call functions defined in from the json-file.
* @param mixed $func
* @param mixed $params
* @return false|mixed
*/
public function __call( $func, $params ) {
if ( !array_key_exists( $func, $this->baseElements ) ) {
throw new InvalidArgumentException( "Function not defined in json " . $func );
}
$currentFunction = $this->baseElements[$func];
if ( array_key_exists( $params[0], $currentFunction ) ) {
return $currentFunction[$params[0]];
}
return false;
}
/**
* Reads the json file to an object
* @return array
*/
private function getJSON() {
$file = self::getJsonFile();
$json = json_decode( $file, true );
return $json;
}
/**
* @return false|string
*/
public static function getJsonFile() {
return file_get_contents( __DIR__ . '/texutil.json' );
}
}

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text/x-php
Expires
Tue, Aug 18, 17:06 (3 w, 4 d ago)
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local-disk
Storage Format
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Storage Handle
7a/82/be1bf879a0d2da2b0ffb20e05fe5
Default Alt Text
TexUtil.php (3 KB)

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