From d90968dba4dc6a99b9d671a9552ee397793a3a2c Mon Sep 17 00:00:00 2001
From: japhib <jphbergeson@gmail.com>
Date: Sun, 27 Oct 2024 21:29:06 -0600
Subject: [PATCH] Add matching brackets and stub for OnTypeFormatting

---
 server/src/parser/test/formatter.test.ts |  2 +-
 server/src/server.ts                     | 14 +++++++++++++-
 syntaxes/language-configuration.json     |  7 ++++++-
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/server/src/parser/test/formatter.test.ts b/server/src/parser/test/formatter.test.ts
index e56441b..8a8062d 100644
--- a/server/src/parser/test/formatter.test.ts
+++ b/server/src/parser/test/formatter.test.ts
@@ -950,7 +950,7 @@ __lua__
         formattedRange: {
           start: { line: 3, character: 0 },
           end: { line: Number.MAX_VALUE, character: 0 },
-        }
+        },
       });
     });
 
diff --git a/server/src/server.ts b/server/src/server.ts
index d65b89c..dfafe7f 100644
--- a/server/src/server.ts
+++ b/server/src/server.ts
@@ -1,6 +1,6 @@
 import {
   CompletionItem, CompletionItemTag, createConnection, DefinitionParams, Diagnostic, DiagnosticSeverity,
-  DidChangeConfigurationNotification, DocumentFormattingParams, DocumentSymbol, DocumentSymbolParams,
+  DidChangeConfigurationNotification, DocumentFormattingParams, DocumentOnTypeFormattingParams, DocumentSymbol, DocumentSymbolParams,
   ExecuteCommandParams, HoverParams, InitializeParams, InitializeResult, Location, Position, ProposedFeatures,
   Range, ReferenceParams, SignatureHelpParams, SignatureInformation, SymbolKind, TextDocumentPositionParams,
   TextDocuments, TextDocumentSyncKind, TextEdit, WorkspaceFolder,
@@ -56,7 +56,12 @@ connection.onInitialize((params: InitializeParams) => {
       completionProvider: { triggerCharacters: [ '.', ':' ], resolveProvider: true },
       hoverProvider: true,
       signatureHelpProvider: { triggerCharacters: [ '(' ], retriggerCharacters: [ ',' ] },
+
+      // Full document formatting
       documentFormattingProvider: true,
+      // // Mini-formatting while typing -
+      // documentOnTypeFormattingProvider: { firstTriggerCharacter: '\n' },
+      // Extra formatting commands to vary the style of formatting
       executeCommandProvider: {
         commands: [
           'pico8formatFile',
@@ -832,6 +837,13 @@ function executeCommand_formatDocument(documentUri: string, opts: FormatterOptio
   );
 }
 
+// Use onDocumentOnTypeFormatting to insert "end" when pressing "enter" after typing the beginning
+// of a function, while loop, for loop, etc.
+// See: https://github.com/elixir-lsp/elixir-ls/blob/master/apps/language_server/lib/language_server/providers/on_type_formatting.ex
+connection.onDocumentOnTypeFormatting((params: DocumentOnTypeFormattingParams) => {
+
+});
+
 // Make the text document manager listen on the connection
 // for open, change and close text document events
 documents.listen(connection);
diff --git a/syntaxes/language-configuration.json b/syntaxes/language-configuration.json
index 03e9845..edd851d 100644
--- a/syntaxes/language-configuration.json
+++ b/syntaxes/language-configuration.json
@@ -7,7 +7,12 @@
     "brackets": [
         ["{", "}"],
         ["[", "]"],
-        ["(", ")"]
+        ["(", ")"],
+        ["then", "elseif"],
+        ["then", "end"],
+        ["do", "end"],
+        ["function", "end"],
+        ["repeat", "until"],
     ],
     // symbols that are auto closed when typing
     "autoClosingPairs": [