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https://github.com/RGBCube/serenity
synced 2025-07-27 08:27:46 +00:00
LanguageServers/Cpp: Add 'FindDeclaration' capability
The C++ LanguageServer can now find the matching declaration for variable names, function calls, struct/class types and properties. When clicking on one of the above with Ctrl pressed, HackStudio will ask the language server to find a matching declaration, and navigate to the result in the Editor. :^)
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parent
d3ff82ba80
commit
5bc82c0185
12 changed files with 150 additions and 38 deletions
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@ -41,6 +41,13 @@ public:
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virtual void on_edit([[maybe_unused]] const String& file) {};
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virtual void file_opened([[maybe_unused]] const String& file) {};
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struct ProjectPosition {
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String file;
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size_t line;
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size_t column;
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};
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virtual Optional<ProjectPosition> find_declaration_of(const String&, const GUI::TextPosition&) { return {}; };
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protected:
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const FileDB& filedb() const { return m_filedb; }
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@ -128,7 +128,7 @@ void ClientConnection::handle(const Messages::LanguageServer::SetFileContent& me
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void ClientConnection::handle(const Messages::LanguageServer::SetAutoCompleteMode& message)
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{
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#ifdef DEBUG_CPP_LANGUAGE_SERVER
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#ifdef CPP_LANGUAGE_SERVER_DEBUG
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dbgln("SetAutoCompleteMode: {}", message.mode());
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#endif
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if (message.mode() == "Parser")
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@ -137,4 +137,23 @@ void ClientConnection::handle(const Messages::LanguageServer::SetAutoCompleteMod
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m_autocomplete_engine = make<LexerAutoComplete>(m_filedb);
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}
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void ClientConnection::handle(const Messages::LanguageServer::FindDeclaration& message)
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{
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dbgln_if(CPP_LANGUAGE_SERVER_DEBUG, "FindDeclaration: {} {}:{}", message.file_name(), message.line(), message.column());
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auto document = m_filedb.get(message.file_name());
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if (!document) {
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dbgln("file {} has not been opened", message.file_name());
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return;
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}
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GUI::TextPosition identifier_position = { (size_t)message.line(), (size_t)message.column() };
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auto location = m_autocomplete_engine->find_declaration_of(message.file_name(), identifier_position);
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if (!location.has_value()) {
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dbgln("could not find declaration");
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return;
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}
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dbgln_if(CPP_LANGUAGE_SERVER_DEBUG, "declaration location: {} {}:{}", location.value().file, location.value().line, location.value().column);
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post_message(Messages::LanguageClient::DeclarationLocation(location.value().file, location.value().line, location.value().column));
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}
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}
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@ -57,6 +57,7 @@ private:
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virtual void handle(const Messages::LanguageServer::SetFileContent&) override;
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virtual void handle(const Messages::LanguageServer::AutoCompleteSuggestions&) override;
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virtual void handle(const Messages::LanguageServer::SetAutoCompleteMode&) override;
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virtual void handle(const Messages::LanguageServer::FindDeclaration&) override;
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FileDB m_filedb;
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OwnPtr<AutoCompleteEngine> m_autocomplete_engine;
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@ -33,16 +33,6 @@
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#include <LibCpp/Preprocessor.h>
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#include <LibRegex/Regex.h>
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// #define AUTOCOMPLETE_VERBOSE
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#ifdef AUTOCOMPLETE_VERBOSE
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# define VERBOSE(fmt, ...) dbgln(fmt, ##__VA_ARGS__)
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#else
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# define VERBOSE(fmt, ...) \
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do { \
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} while (0)
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#endif
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namespace LanguageServers::Cpp {
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ParserAutoComplete::ParserAutoComplete(const FileDB& filedb)
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@ -77,7 +67,7 @@ OwnPtr<ParserAutoComplete::DocumentData> ParserAutoComplete::create_document_dat
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for (auto& path : document_data->preprocessor.included_paths()) {
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get_or_create_document_data(document_path_from_include_path(path));
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}
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#ifdef DEBUG_AUTOCOMPLETE
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#ifdef CPP_LANGUAGE_SERVER_DEBUG
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root->dump(0);
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#endif
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return move(document_data);
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@ -99,12 +89,12 @@ Vector<GUI::AutocompleteProvider::Entry> ParserAutoComplete::get_suggestions(con
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{
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Cpp::Position position { autocomplete_position.line(), autocomplete_position.column() > 0 ? autocomplete_position.column() - 1 : 0 };
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VERBOSE("ParserAutoComplete position {}:{}", position.line, position.column);
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dbgln_if(CPP_LANGUAGE_SERVER_DEBUG, "ParserAutoComplete position {}:{}", position.line, position.column);
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const auto& document = get_or_create_document_data(file);
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auto node = document.parser.node_at(position);
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if (!node) {
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VERBOSE("no node at position {}:{}", position.line, position.column);
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dbgln_if(CPP_LANGUAGE_SERVER_DEBUG, "no node at position {}:{}", position.line, position.column);
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return {};
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}
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@ -130,17 +120,22 @@ Vector<GUI::AutocompleteProvider::Entry> ParserAutoComplete::get_suggestions(con
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return autocomplete_name(document, *node, partial_text.view());
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}
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Vector<GUI::AutocompleteProvider::Entry> ParserAutoComplete::autocomplete_name(const DocumentData& document, const ASTNode& node, const StringView& partial_text) const
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NonnullRefPtrVector<Declaration> ParserAutoComplete::get_available_declarations(const DocumentData& document, const ASTNode& node) const
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{
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const Cpp::ASTNode* current = &node;
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NonnullRefPtrVector<Cpp::Declaration> available_declarations;
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NonnullRefPtrVector<Declaration> available_declarations;
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while (current) {
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available_declarations.append(current->declarations());
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current = current->parent();
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}
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available_declarations.append(get_declarations_in_outer_scope_including_headers(document));
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return available_declarations;
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}
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Vector<GUI::AutocompleteProvider::Entry> ParserAutoComplete::autocomplete_name(const DocumentData& document, const ASTNode& node, const StringView& partial_text) const
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{
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auto available_declarations = get_available_declarations(document, node);
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Vector<StringView> available_names;
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auto add_name = [&available_names](auto& name) {
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if (name.is_null() || name.is_empty())
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@ -173,7 +168,7 @@ Vector<GUI::AutocompleteProvider::Entry> ParserAutoComplete::autocomplete_proper
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{
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auto type = type_of(document, *parent.m_object);
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if (type.is_null()) {
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VERBOSE("Could not infer type of object");
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dbgln_if(CPP_LANGUAGE_SERVER_DEBUG, "Could not infer type of object");
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return {};
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}
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@ -321,4 +316,47 @@ void ParserAutoComplete::file_opened([[maybe_unused]] const String& file)
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set_document_data(file, create_document_data_for(file));
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}
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Optional<AutoCompleteEngine::ProjectPosition> ParserAutoComplete::find_declaration_of(const String& file_name, const GUI::TextPosition& identifier_position)
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{
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const auto& document = get_or_create_document_data(file_name);
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auto node = document.parser.node_at(Cpp::Position { identifier_position.line(), identifier_position.column() });
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if (!node) {
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dbgln_if(CPP_LANGUAGE_SERVER_DEBUG, "no node at position {}:{}", identifier_position.line(), identifier_position.column());
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return {};
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}
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auto decl = find_declaration_of(document, *node);
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if (!decl)
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return {};
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return ProjectPosition { decl->filename(), decl->start().line, decl->start().column };
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}
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RefPtr<Declaration> ParserAutoComplete::find_declaration_of(const DocumentData& document_data, const ASTNode& node) const
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{
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dbgln_if(CPP_LANGUAGE_SERVER_DEBUG, "find_declaration_of: {}", document_data.parser.text_of_node(node));
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auto declarations = get_available_declarations(document_data, node);
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for (auto& decl : declarations) {
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if (node.is_identifier() && decl.is_variable_or_parameter_declaration()) {
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if (((Cpp::VariableOrParameterDeclaration&)decl).m_name == static_cast<const Identifier&>(node).m_name)
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return decl;
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}
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if (node.is_type() && decl.is_struct_or_class()) {
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if (((Cpp::StructOrClassDeclaration&)decl).m_name == static_cast<const Type&>(node).m_name)
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return decl;
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}
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if (node.is_function_call() && decl.is_function()) {
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if (((Cpp::FunctionDeclaration&)decl).m_name == static_cast<const FunctionCall&>(node).m_name)
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return decl;
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}
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if (is_property(node) && decl.is_struct_or_class()) {
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for (auto& member : ((Cpp::StructOrClassDeclaration&)decl).m_members) {
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ASSERT(node.is_identifier());
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if (member.m_name == ((const Identifier&)node).m_name)
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return member;
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}
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}
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}
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return {};
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}
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}
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@ -47,10 +47,11 @@ public:
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virtual Vector<GUI::AutocompleteProvider::Entry> get_suggestions(const String& file, const GUI::TextPosition& autocomplete_position) override;
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virtual void on_edit(const String& file) override;
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virtual void file_opened([[maybe_unused]] const String& file) override;
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virtual Optional<ProjectPosition> find_declaration_of(const String& file_name, const GUI::TextPosition& identifier_position) override;
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private:
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struct DocumentData {
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DocumentData(String&& text);
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DocumentData(String&& text, const String& filename);
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String text;
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Preprocessor preprocessor;
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Parser parser;
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@ -63,6 +64,8 @@ private:
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String type_of_variable(const Identifier&) const;
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bool is_property(const ASTNode&) const;
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bool is_empty_property(const DocumentData&, const ASTNode&, const Position& autocomplete_position) const;
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RefPtr<Declaration> find_declaration_of(const DocumentData&, const ASTNode&) const;
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NonnullRefPtrVector<Declaration> get_available_declarations(const DocumentData&, const ASTNode&) const;
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struct PropertyInfo {
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StringView name;
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@ -1,4 +1,5 @@
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endpoint LanguageClient = 8002
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{
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AutoCompleteSuggestions(Vector<GUI::AutocompleteProvider::Entry> suggestions) =|
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DeclarationLocation(String file_name, i32 line, i32 column) =|
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}
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@ -9,4 +9,6 @@ endpoint LanguageServer = 8001
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AutoCompleteSuggestions(String file_name, i32 cursor_line, i32 cursor_column) =|
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SetAutoCompleteMode(String mode) =|
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FindDeclaration(String file_name, i32 line, i32 column) =|
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}
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@ -57,6 +57,7 @@ private:
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virtual void handle(const Messages::LanguageServer::SetFileContent&) override;
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virtual void handle(const Messages::LanguageServer::AutoCompleteSuggestions&) override;
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virtual void handle(const Messages::LanguageServer::SetAutoCompleteMode&) override { }
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virtual void handle(const Messages::LanguageServer::FindDeclaration&) override {};
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RefPtr<GUI::TextDocument> document_for(const String& file_name);
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