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Direktori : /home2/selectio/www/ecommerce-website/website/vendor/nikic/php-parser/lib/PhpParser/ |
Current File : /home2/selectio/www/ecommerce-website/website/vendor/nikic/php-parser/lib/PhpParser/NameContext.php |
<?php declare(strict_types=1); namespace PhpParser; use PhpParser\Node\Name; use PhpParser\Node\Name\FullyQualified; use PhpParser\Node\Stmt; class NameContext { /** @var null|Name Current namespace */ protected $namespace; /** @var Name[][] Map of format [aliasType => [aliasName => originalName]] */ protected $aliases = []; /** @var Name[][] Same as $aliases but preserving original case */ protected $origAliases = []; /** @var ErrorHandler Error handler */ protected $errorHandler; /** * Create a name context. * * @param ErrorHandler $errorHandler Error handling used to report errors */ public function __construct(ErrorHandler $errorHandler) { $this->errorHandler = $errorHandler; } /** * Start a new namespace. * * This also resets the alias table. * * @param Name|null $namespace Null is the global namespace */ public function startNamespace(Name $namespace = null) { $this->namespace = $namespace; $this->origAliases = $this->aliases = [ Stmt\Use_::TYPE_NORMAL => [], Stmt\Use_::TYPE_FUNCTION => [], Stmt\Use_::TYPE_CONSTANT => [], ]; } /** * Add an alias / import. * * @param Name $name Original name * @param string $aliasName Aliased name * @param int $type One of Stmt\Use_::TYPE_* * @param array $errorAttrs Attributes to use to report an error */ public function addAlias(Name $name, string $aliasName, int $type, array $errorAttrs = []) { // Constant names are case sensitive, everything else case insensitive if ($type === Stmt\Use_::TYPE_CONSTANT) { $aliasLookupName = $aliasName; } else { $aliasLookupName = strtolower($aliasName); } if (isset($this->aliases[$type][$aliasLookupName])) { $typeStringMap = [ Stmt\Use_::TYPE_NORMAL => '', Stmt\Use_::TYPE_FUNCTION => 'function ', Stmt\Use_::TYPE_CONSTANT => 'const ', ]; $this->errorHandler->handleError(new Error( sprintf( 'Cannot use %s%s as %s because the name is already in use', $typeStringMap[$type], $name, $aliasName ), $errorAttrs )); return; } $this->aliases[$type][$aliasLookupName] = $name; $this->origAliases[$type][$aliasName] = $name; } /** * Get current namespace. * * @return null|Name Namespace (or null if global namespace) */ public function getNamespace() { return $this->namespace; } /** * Get resolved name. * * @param Name $name Name to resolve * @param int $type One of Stmt\Use_::TYPE_{FUNCTION|CONSTANT} * * @return null|Name Resolved name, or null if static resolution is not possible */ public function getResolvedName(Name $name, int $type) { // don't resolve special class names if ($type === Stmt\Use_::TYPE_NORMAL && $name->isSpecialClassName()) { if (!$name->isUnqualified()) { $this->errorHandler->handleError(new Error( sprintf("'\\%s' is an invalid class name", $name->toString()), $name->getAttributes() )); } return $name; } // fully qualified names are already resolved if ($name->isFullyQualified()) { return $name; } // Try to resolve aliases if (null !== $resolvedName = $this->resolveAlias($name, $type)) { return $resolvedName; } if ($type !== Stmt\Use_::TYPE_NORMAL && $name->isUnqualified()) { if (null === $this->namespace) { // outside of a namespace unaliased unqualified is same as fully qualified return new FullyQualified($name, $name->getAttributes()); } // Cannot resolve statically return null; } // if no alias exists prepend current namespace return FullyQualified::concat($this->namespace, $name, $name->getAttributes()); } /** * Get resolved class name. * * @param Name $name Class ame to resolve * * @return Name Resolved name */ public function getResolvedClassName(Name $name) : Name { return $this->getResolvedName($name, Stmt\Use_::TYPE_NORMAL); } /** * Get possible ways of writing a fully qualified name (e.g., by making use of aliases). * * @param string $name Fully-qualified name (without leading namespace separator) * @param int $type One of Stmt\Use_::TYPE_* * * @return Name[] Possible representations of the name */ public function getPossibleNames(string $name, int $type) : array { $lcName = strtolower($name); if ($type === Stmt\Use_::TYPE_NORMAL) { // self, parent and static must always be unqualified if ($lcName === "self" || $lcName === "parent" || $lcName === "static") { return [new Name($name)]; } } // Collect possible ways to write this name, starting with the fully-qualified name $possibleNames = [new FullyQualified($name)]; if (null !== $nsRelativeName = $this->getNamespaceRelativeName($name, $lcName, $type)) { // Make sure there is no alias that makes the normally namespace-relative name // into something else if (null === $this->resolveAlias($nsRelativeName, $type)) { $possibleNames[] = $nsRelativeName; } } // Check for relevant namespace use statements foreach ($this->origAliases[Stmt\Use_::TYPE_NORMAL] as $alias => $orig) { $lcOrig = $orig->toLowerString(); if (0 === strpos($lcName, $lcOrig . '\\')) { $possibleNames[] = new Name($alias . substr($name, strlen($lcOrig))); } } // Check for relevant type-specific use statements foreach ($this->origAliases[$type] as $alias => $orig) { if ($type === Stmt\Use_::TYPE_CONSTANT) { // Constants are are complicated-sensitive $normalizedOrig = $this->normalizeConstName($orig->toString()); if ($normalizedOrig === $this->normalizeConstName($name)) { $possibleNames[] = new Name($alias); } } else { // Everything else is case-insensitive if ($orig->toLowerString() === $lcName) { $possibleNames[] = new Name($alias); } } } return $possibleNames; } /** * Get shortest representation of this fully-qualified name. * * @param string $name Fully-qualified name (without leading namespace separator) * @param int $type One of Stmt\Use_::TYPE_* * * @return Name Shortest representation */ public function getShortName(string $name, int $type) : Name { $possibleNames = $this->getPossibleNames($name, $type); // Find shortest name $shortestName = null; $shortestLength = \INF; foreach ($possibleNames as $possibleName) { $length = strlen($possibleName->toCodeString()); if ($length < $shortestLength) { $shortestName = $possibleName; $shortestLength = $length; } } return $shortestName; } private function resolveAlias(Name $name, $type) { $firstPart = $name->getFirst(); if ($name->isQualified()) { // resolve aliases for qualified names, always against class alias table $checkName = strtolower($firstPart); if (isset($this->aliases[Stmt\Use_::TYPE_NORMAL][$checkName])) { $alias = $this->aliases[Stmt\Use_::TYPE_NORMAL][$checkName]; return FullyQualified::concat($alias, $name->slice(1), $name->getAttributes()); } } elseif ($name->isUnqualified()) { // constant aliases are case-sensitive, function aliases case-insensitive $checkName = $type === Stmt\Use_::TYPE_CONSTANT ? $firstPart : strtolower($firstPart); if (isset($this->aliases[$type][$checkName])) { // resolve unqualified aliases return new FullyQualified($this->aliases[$type][$checkName], $name->getAttributes()); } } // No applicable aliases return null; } private function getNamespaceRelativeName(string $name, string $lcName, int $type) { if (null === $this->namespace) { return new Name($name); } if ($type === Stmt\Use_::TYPE_CONSTANT) { // The constants true/false/null always resolve to the global symbols, even inside a // namespace, so they may be used without qualification if ($lcName === "true" || $lcName === "false" || $lcName === "null") { return new Name($name); } } $namespacePrefix = strtolower($this->namespace . '\\'); if (0 === strpos($lcName, $namespacePrefix)) { return new Name(substr($name, strlen($namespacePrefix))); } return null; } private function normalizeConstName(string $name) { $nsSep = strrpos($name, '\\'); if (false === $nsSep) { return $name; } // Constants have case-insensitive namespace and case-sensitive short-name $ns = substr($name, 0, $nsSep); $shortName = substr($name, $nsSep + 1); return strtolower($ns) . '\\' . $shortName; } }