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<?php |
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namespace VLF; |
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/** |
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* Интерпретатор AST VLF разметки |
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*/ |
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class Interpreter |
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{ |
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static array $objects = []; // Массив созданных объектов (название => объект) |
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static bool $throw_errors = true; // Выводить ли ошибки интерпретации |
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static bool $allow_multimethods_calls = true; // Можно ли использовать многоуровневые вызовы методов (->method1->method2) |
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private static array $imported_styles = []; |
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/** |
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* Интерпретирование синтаксического дерева |
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* |
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* @param AST $tree - Абстрактное Синтаксическое Дерево (АСД), сгенерированное VLF Parser'ом |
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* [@param array $parent = null] - нода-родитель дерева (системная настройка) |
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* |
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* @return array - возвращает список созданных объектов |
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*/ |
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public static function run (AST $tree, Node $parent = null): array |
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{ |
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foreach ($tree->getNodes () as $node) |
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{ |
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switch ($node->type) |
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{ |
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case OBJECT_DEFINITION: |
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$class = $node->args['class']; |
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$name = $node->args['name']; |
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$args = []; |
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if (isset (self::$objects[$name])) |
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break; |
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if (isset ($node->args['args'])) |
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{ |
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$args = $node->args['args']; |
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foreach ($args as $arg_id => $arg) |
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$args[$arg_id] = self::formatLine ($arg, self::$objects); |
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} |
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try |
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{ |
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self::$objects[$name] = eval ("namespace VoidEngine; return new $class (". implode (', ', $args) .");"); |
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try |
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{ |
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self::$objects[$name]->name = $name; |
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} |
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catch (\Throwable $e) {} |
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} |
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catch (\Throwable $e) |
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{ |
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if (self::$throw_errors) |
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throw new \Exception ('Interpeter couldn\'t create object "'. $class .'" with name "'. $name .'" at line "'. $node->line .'". Exception info:'. "\n\n". (string) $e, 0, $e); |
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} |
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break; |
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case PROPERTY_SET: |
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if ($parent !== null) |
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{ |
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$name = $parent->args['name']; |
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$propertyName = $node->args['name']; |
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$propertyValue = $node->args['value']; |
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$preset = ''; |
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if (preg_match ('/function \((.*)\) use \((.*)\)/', $propertyValue)) |
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{ |
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$use = substr ($propertyValue, strpos ($propertyValue, 'use')); |
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$use = $ouse = substr ($use, ($pos = strpos ($use, '(') + 1), strpos ($use, ')') - $pos); |
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$use = explode (' ', $use); |
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foreach ($use as $id => $useParam) |
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if (isset (self::$objects[$useParam]) && $use[$id + 1][0] == '$') |
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{ |
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$fname = $use[$id + 1]; |
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if (substr ($fname, strlen ($fname) - 1) == ',') |
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$fname = substr ($fname, 0, -1); |
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$preset .= "$fname = $useParam; "; |
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unset ($use[$id]); |
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} |
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$preset = self::formatLine ($preset, self::$objects); |
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$propertyValue = self::formatLine (str_replace ($ouse, implode (' ', $use), $propertyValue), self::$objects); |
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} |
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else $propertyValue = self::formatLine ($propertyValue, self::$objects); |
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try |
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{ |
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if (strpos ($propertyName, '->') !== false && self::$allow_multimethods_calls) |
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eval ('namespace VoidEngine; '. $preset .' _c('. self::$objects[$name]->selector .')->'. $propertyName .' = '. $propertyValue .';'); |
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else self::$objects[$name]->$propertyName = eval ("namespace VoidEngine; $preset return $propertyValue;"); |
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} |
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catch (\Throwable $e) |
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{ |
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if (self::$throw_errors) |
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throw new \Exception ('Interpeter couldn\'t set property "'. $propertyName .'" with value "'. $propertyValue .'" at line "'. $node->line .'". Exception info:'. "\n\n". (string) $e, 0, $e); |
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} |
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} |
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elseif (self::$throw_errors) |
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throw new \Exception ('Setting property to an non-object at line "'. $node->line); |
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break; |
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case METHOD_CALL: |
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if ($parent !== null) |
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{ |
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$name = $parent->args['name']; |
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$methodName = $node->args['name']; |
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$methodArgs = $node->args['args']; |
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foreach ($methodArgs as $arg_id => $arg) |
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$methodArgs[$arg_id] = self::formatLine ($arg, self::$objects); |
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try |
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{ |
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if (strpos ($methodName, '->') !== false && self::$allow_multimethods_calls) |
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eval ('namespace VoidEngine; _c('. self::$objects[$name]->selector .')->'. $methodName .' ('. implode (', ', $methodArgs) .');'); |
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elseif (sizeof ($methodArgs) > 0) |
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self::$objects[$name]->$methodName (...eval ('namespace VoidEngine; return ['. implode (', ', $methodArgs) .'];')); |
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else self::$objects[$name]->$methodName (); |
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} |
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catch (\Throwable $e) |
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{ |
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if (self::$throw_errors) |
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throw new \Exception ('Interpeter couldn\'t call method "'. $methodName .'" with arguments '. json_encode ($methodArgs) .' at line "'. $node->line .'". Exception info:'. "\n\n". (string) $e, 0, $e); |
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} |
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} |
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elseif (self::$throw_errors) |
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throw new \Exception ('Calling method to an non-object at line "'. $node->line .'"'); |
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break; |
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case STYLES_IMPORTING: |
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foreach ($node->args['imports'] as $style) |
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{ |
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$path = eval ('namespace VoidEngine; return '. self::formatLine ($style, self::$objects) .';'); |
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if (!file_exists ($path)) |
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{ |
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if (self::$throw_errors) |
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throw new \Exception ('Trying to import nonexistent style at line "'. $node->line .'"'); |
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} |
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elseif (!isset (self::$imported_styles[$path])) |
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{ |
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\VLF\VST\Interpreter::run (\VLF\VST\Parser::parse (file_get_contents ($path))); |
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self::$imported_styles[$path] = true; |
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} |
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} |
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break; |
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case RUNTIME_EXECUTION: |
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eval (self::formatLine ($node->args['code'], self::$objects)); |
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break; |
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} |
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$nodes = $node->getNodes (); |
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if ($node->type == OBJECT_DEFINITION) |
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{ |
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if (isset (\VLF\VST\Interpreter::$default_styles[$node->args['class']])) |
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$nodes = array_merge ($nodes, \VLF\VST\Interpreter::$default_styles[$node->args['class']]); |
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if (isset ($node->args['styles'])) |
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foreach ($node->args['styles'] as $style) |
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if (isset (\VLF\VST\Interpreter::$styles[$style])) |
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$nodes = array_merge ($nodes, \VLF\VST\Interpreter::$styles[$style]); |
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elseif (self::$throw_errors) |
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throw new \Exception ('Trying to set undefined style "'. $style .'" to object at line "'. $node->line .'"'); |
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} |
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self::$objects = self::run (new AST (array_map ( |
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fn ($node) => $node->export (), $nodes)), $node); |
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} |
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return self::$objects; |
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} |
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/** |
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* Форматирование строки |
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* |
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* @param string $line - строка для форматирования |
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* [@param array $objects = []] - список объектов, которые будут участвовать в форматировании |
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* |
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* @return string - возвращает форматированную строку |
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*/ |
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public static function formatLine (string $line, array $objects = []): string |
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{ |
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if (sizeof ($objects) > 0) |
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{ |
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$len = strlen ($line); |
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$newLine = ''; |
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$replacement = array_map (function ($object) |
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{ |
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return \VoidEngine\Components::exists ($object->selector) !== false ? |
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'\VoidEngine\_c('. $object->selector .')' : |
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'unserialize (\''. serialize ($object) .'\')'; |
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}, $objects); |
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$replacement = array_map (function ($name) |
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{ |
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return strlen ($name = trim ($name)) + substr_count ($name, '_'); |
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}, $omap = array_flip ($replacement)); |
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arsort ($replacement); |
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$nReplacement = []; |
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foreach ($replacement as $replaceTo => $nLn) |
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$nReplacement[$omap[$replaceTo]] = $replaceTo; |
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$replacement = $nReplacement; |
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$blacklist = array_flip (['\'', '"', '$']); |
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for ($i = 0; $i < $len; ++$i) |
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{ |
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$replaced = false; |
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foreach ($replacement as $name => $replaceAt) |
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if (substr ($line, $i, ($l = strlen ($name))) == $name && !isset ($blacklist[$line[$i - 1]])) |
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{ |
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$newLine .= $replaceAt; |
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$i += $l - 1; |
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$replaced = true; |
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break; |
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} |
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252
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if (!$replaced) |
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$newLine .= $line[$i]; |
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} |
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256
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$line = $newLine; |
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} |
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return $line; |
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} |
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public static function clear (): void |
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263
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{ |
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self::$objects = []; |
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265
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self::$imported_styles = []; |
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} |
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} |
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winforms-php /
VoidFramework
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