Add initialization option capabilities.* and index.maxInitializerLines

indexer.cc: use index.maxInitializerLines instead of kInitializerMaxLines

messages/initialize.cc: some ServerCapabilities are toggable:

documentOnTypeFormattingProvider.firstTriggerCharacter
foldingRangeProvider
workspace.workspaceFolders.supported

src/config.hh

@@ -42,6 +42,25 @@ struct Config {
   // member has changed.
   SerializeFormat cacheFormat = SerializeFormat::Binary;
 
+  struct ServerCap {
+    struct DocumentOnTypeFormattingOptions {
+      std::string firstTriggerCharacter = "}";
+      std::vector<const char *> moreTriggerCharacter;
+    } documentOnTypeFormattingProvider;
+
+    // Set to false if you don't want folding ranges.
+    bool foldingRangeProvider = true;
+
+    struct Workspace {
+      struct WorkspaceFolders {
+        // Set to false if you don't want workspace folders.
+        bool supported = true;
+
+        bool changeNotifications = true;
+      } workspaceFolders;
+    } workspace;
+  } capabilities;
+
   struct Clang {
     // Arguments that should be excluded, e.g. ["-fopenmp", "-Wall"]
     //
@@ -207,6 +226,10 @@ struct Config {
     std::vector<std::string> initialBlacklist;
     std::vector<std::string> initialWhitelist;
 
+    // If a variable initializer/macro replacement-list has fewer than this many
+    // lines, include the initializer in detailed_name.
+    int maxInitializerLines = 5;
+
     // If not 0, a file will be indexed in each tranlation unit that includes it.
     int multiVersion = 0;
 
@@ -255,6 +278,13 @@ struct Config {
     int maxNum = 2000;
   } xref;
 };
+REFLECT_STRUCT(Config::ServerCap::DocumentOnTypeFormattingOptions,
+               firstTriggerCharacter, moreTriggerCharacter);
+REFLECT_STRUCT(Config::ServerCap::Workspace::WorkspaceFolders, supported,
+               changeNotifications);
+REFLECT_STRUCT(Config::ServerCap::Workspace, workspaceFolders);
+REFLECT_STRUCT(Config::ServerCap, documentOnTypeFormattingProvider,
+               foldingRangeProvider, workspace);
 REFLECT_STRUCT(Config::Clang, excludeArgs, extraArgs, pathMappings,
                resourceDir);
 REFLECT_STRUCT(Config::ClientCapability, hierarchicalDocumentSymbolSupport,
@@ -269,17 +299,17 @@ REFLECT_STRUCT(Config::Diagnostics, blacklist, onChange, onOpen, onSave,
                spellChecking, whitelist)
 REFLECT_STRUCT(Config::Highlight, largeFileSize, lsRanges, blacklist, whitelist)
 REFLECT_STRUCT(Config::Index, blacklist, comments, initialBlacklist,
-               initialWhitelist, multiVersion, multiVersionBlacklist,
+               initialWhitelist, maxInitializerLines, multiVersion,
-               multiVersionWhitelist, onChange, threads, trackDependency,
+               multiVersionBlacklist, multiVersionWhitelist, onChange, threads,
-               whitelist);
+               trackDependency, whitelist);
 REFLECT_STRUCT(Config::Request, timeout);
 REFLECT_STRUCT(Config::Session, maxNum);
 REFLECT_STRUCT(Config::WorkspaceSymbol, caseSensitivity, maxNum, sort);
 REFLECT_STRUCT(Config::Xref, maxNum);
 REFLECT_STRUCT(Config, compilationDatabaseCommand, compilationDatabaseDirectory,
-               cacheDirectory, cacheFormat, clang, client, codeLens, completion,
+               cacheDirectory, cacheFormat, capabilities, clang, client,
-               diagnostics, highlight, index, request, session, workspaceSymbol,
+               codeLens, completion, diagnostics, highlight, index, request,
-               xref);
+               session, workspaceSymbol, xref);
 
 extern Config *g_config;
 

src/indexer.cc

@@ -29,8 +29,6 @@ using namespace clang;
 namespace ccls {
 namespace {
 
-constexpr int kInitializerMaxLines = 3;
-
 GroupMatch *multiVersionMatcher;
 
 struct File {
@@ -586,7 +584,7 @@ public:
       if (L.isMacroID() || !SM.isBeforeInTranslationUnit(L, R.getBegin()))
         return;
       StringRef Buf = GetSourceInRange(SM, Lang, R);
-      Twine Init = Buf.count('\n') <= kInitializerMaxLines - 1
+      Twine Init = Buf.count('\n') <= g_config->index.maxInitializerLines - 1
                        ? Buf.size() && Buf[0] == ':' ? Twine(" ", Buf)
                                                      : Twine(" = ", Buf)
                        : Twine();
@@ -1085,7 +1083,7 @@ public:
         var.def.short_name_size = Name.size();
         StringRef Buf = GetSourceInRange(SM, Lang, R);
         var.def.hover =
-            Intern(Buf.count('\n') <= kInitializerMaxLines - 1
+            Intern(Buf.count('\n') <= g_config->index.maxInitializerLines - 1
                        ? Twine("#define ", GetSourceInRange(SM, Lang, R)).str()
                        : Twine("#define ", Name).str());
       }

src/messages/initialize.cc

@@ -76,10 +76,8 @@ struct ServerCap {
   } codeLensProvider;
   bool documentFormattingProvider = true;
   bool documentRangeFormattingProvider = true;
-  struct DocumentOnTypeFormattingOptions {
+  Config::ServerCap::DocumentOnTypeFormattingOptions
-    std::string firstTriggerCharacter = "}";
+      documentOnTypeFormattingProvider;
-    std::vector<const char *> moreTriggerCharacter;
-  } documentOnTypeFormattingProvider;
   bool renameProvider = true;
   struct DocumentLinkOptions {
     bool resolveProvider = true;
@@ -89,28 +87,18 @@ struct ServerCap {
   struct ExecuteCommandOptions {
     std::vector<const char *> commands = {ccls_xref};
   } executeCommandProvider;
-  struct Workspace {
+  Config::ServerCap::Workspace workspace;
-    struct WorkspaceFolders {
-      bool supported = true;
-      bool changeNotifications = true;
-    } workspaceFolders;
-  } workspace;
 };
 REFLECT_STRUCT(ServerCap::CodeActionOptions, codeActionKinds);
 REFLECT_STRUCT(ServerCap::CodeLensOptions, resolveProvider);
 REFLECT_STRUCT(ServerCap::CompletionOptions, resolveProvider,
                triggerCharacters);
 REFLECT_STRUCT(ServerCap::DocumentLinkOptions, resolveProvider);
-REFLECT_STRUCT(ServerCap::DocumentOnTypeFormattingOptions,
-               firstTriggerCharacter, moreTriggerCharacter);
 REFLECT_STRUCT(ServerCap::ExecuteCommandOptions, commands);
 REFLECT_STRUCT(ServerCap::SaveOptions, includeText);
 REFLECT_STRUCT(ServerCap::SignatureHelpOptions, triggerCharacters);
 REFLECT_STRUCT(ServerCap::TextDocumentSyncOptions, openClose, change, willSave,
                willSaveWaitUntil, save);
-REFLECT_STRUCT(ServerCap::Workspace::WorkspaceFolders, supported,
-               changeNotifications);
-REFLECT_STRUCT(ServerCap::Workspace, workspaceFolders);
 REFLECT_STRUCT(ServerCap, textDocumentSync, hoverProvider, completionProvider,
                signatureHelpProvider, declarationProvider, definitionProvider,
                implementationProvider, typeDefinitionProvider,
@@ -318,7 +306,15 @@ void Initialize(MessageHandler *m, InitializeParam &param, ReplyOnce &reply) {
 
   // Send initialization before starting indexers, so we don't send a
   // status update too early.
-  reply(InitializeResult{});
+  {
+    InitializeResult result;
+    auto &c = result.capabilities;
+    c.documentOnTypeFormattingProvider =
+        g_config->capabilities.documentOnTypeFormattingProvider;
+    c.foldingRangeProvider = g_config->capabilities.foldingRangeProvider;
+    c.workspace = g_config->capabilities.workspace;
+    reply(result);
+  }
 
   // Set project root.
   EnsureEndsInSlash(project_path);