94 lines
3.0 KiB
PHP
94 lines
3.0 KiB
PHP
<?php
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namespace LanguageServer;
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use PhpParser\{Error, Comment, Node, ParserFactory, NodeTraverser, Lexer};
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use PhpParser\NodeVisitor\NameResolver;
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use LanguageServer\Protocol\TextDocumentItem;
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/**
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* Provides method handlers for all textDocument/* methods
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*/
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class TextDocumentManager
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{
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/**
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* @var PhpParser\Parser
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*/
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private $parser;
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/**
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* A map from file URIs to ASTs
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*
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* @var PhpParser\Stmt[][]
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*/
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private $asts;
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public function __construct()
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{
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$lexer = new Lexer(['usedAttributes' => ['comments', 'startLine', 'endLine', 'startFilePos', 'endFilePos']]);
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$this->parser = (new ParserFactory)->create(ParserFactory::PREFER_PHP7, $lexer, ['throwOnError' => false]);
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}
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/**
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* The document symbol request is sent from the client to the server to list all symbols found in a given text
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* document.
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*
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* @param LanguageServer\Protocol\TextDocumentIdentifier $textDocument
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* @return SymbolInformation[]
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*/
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public function documentSymbol(TextDocumentIdentifier $textDocument): array
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{
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$stmts = $this->asts[$textDocument->uri];
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if (!$stmts) {
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return [];
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}
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$finder = new SymbolFinder($textDocument->uri);
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$traverser = new NodeTraverser;
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$traverser->addVisitor($finder);
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$traverser->traverse($stmts);
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return $finder->symbols;
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}
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/**
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* The document open notification is sent from the client to the server to signal newly opened text documents. The
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* document's truth is now managed by the client and the server must not try to read the document's truth using the
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* document's uri.
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*
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* @param LanguageServer\Protocol\TextDocumentItem $textDocument The document that was opened.
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* @return void
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*/
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public function didOpen(TextDocumentItem $textDocument)
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{
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$this->updateAst($textDocument->uri, $textDocument->text);
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}
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/**
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* The document change notification is sent from the client to the server to signal changes to a text document.
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*
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* @param LanguageServer\Protocol\VersionedTextDocumentIdentifier $textDocument
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* @param LanguageServer\Protocol\TextDocumentContentChangeEvent[] $contentChanges
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* @return void
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*/
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public function didChange(VersionedTextDocumentIdentifier $textDocument, array $contentChanges)
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{
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$this->updateAst($textDocument->uri, $contentChanges->text);
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}
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private function updateAst(string $uri, string $content)
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{
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$stmts = $parser->parse($content);
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// TODO report errors as diagnostics
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// foreach ($parser->getErrors() as $error) {
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// error_log($error->getMessage());
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// }
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// $stmts can be null in case of a fatal parsing error
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if ($stmts) {
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$traverser = new NodeTraverser;
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$traverser->addVisitor(new NameResolver);
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$traverser->addVisitor(new ColumnCalculator($textDocument->text));
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$traverser->traverse($stmts);
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}
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$this->asts[$uri] = $stmts;
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}
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}
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