From dc383b4faef881f3bb22816f42c53a79236a4152 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Sun, 17 Aug 2025 00:06:00 +0300
Subject: lsp/config: make completion trigger characters configurable

- Add trigger_characters to JSON config and ServerOptions
- Store on server and advertise in initialize
- Update README and example config
- Preserve previous defaults when unset
---
 internal/lsp/server.go | 63 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 39 insertions(+), 24 deletions(-)

(limited to 'internal/lsp/server.go')

diff --git a/internal/lsp/server.go b/internal/lsp/server.go
index 81cb661..f828ec8 100644
--- a/internal/lsp/server.go
+++ b/internal/lsp/server.go
@@ -27,6 +27,7 @@ type Server struct {
 	windowLines      int
 	maxContextTokens int
 	noDiskIO         bool
+	triggerChars     []string
 	// LLM request stats
 	llmReqTotal       int64
 	llmSentBytesTotal int64
@@ -37,33 +38,47 @@ type Server struct {
 
 // ServerOptions collects configuration for NewServer to avoid long parameter lists.
 type ServerOptions struct {
-    LogContext       bool
-    MaxTokens        int
-    ContextMode      string
-    WindowLines      int
-    MaxContextTokens int
-    NoDiskIO         bool
-    Client           llm.Client
+	LogContext        bool
+	MaxTokens         int
+	ContextMode       string
+	WindowLines       int
+	MaxContextTokens  int
+	NoDiskIO          bool
+	Client            llm.Client
+	TriggerCharacters []string
 }
 
 func NewServer(r io.Reader, w io.Writer, logger *log.Logger, opts ServerOptions) *Server {
-    s := &Server{in: bufio.NewReader(r), out: w, logger: logger, docs: make(map[string]*document), logContext: opts.LogContext}
-    maxTokens := opts.MaxTokens
-    if maxTokens <= 0 { maxTokens = 500 }
-    s.maxTokens = maxTokens
-    contextMode := opts.ContextMode
-    if contextMode == "" { contextMode = "file-on-new-func" }
-    windowLines := opts.WindowLines
-    if windowLines <= 0 { windowLines = 120 }
-    maxContextTokens := opts.MaxContextTokens
-    if maxContextTokens <= 0 { maxContextTokens = 2000 }
-    s.contextMode = contextMode
-    s.windowLines = windowLines
-    s.maxContextTokens = maxContextTokens
-    s.noDiskIO = opts.NoDiskIO
-    s.startTime = time.Now()
-    s.llmClient = opts.Client
-    return s
+	s := &Server{in: bufio.NewReader(r), out: w, logger: logger, docs: make(map[string]*document), logContext: opts.LogContext}
+	maxTokens := opts.MaxTokens
+	if maxTokens <= 0 {
+		maxTokens = 500
+	}
+	s.maxTokens = maxTokens
+	contextMode := opts.ContextMode
+	if contextMode == "" {
+		contextMode = "file-on-new-func"
+	}
+	windowLines := opts.WindowLines
+	if windowLines <= 0 {
+		windowLines = 120
+	}
+	maxContextTokens := opts.MaxContextTokens
+	if maxContextTokens <= 0 {
+		maxContextTokens = 2000
+	}
+	s.contextMode = contextMode
+	s.windowLines = windowLines
+	s.maxContextTokens = maxContextTokens
+	s.noDiskIO = opts.NoDiskIO
+	s.startTime = time.Now()
+	s.llmClient = opts.Client
+	if len(opts.TriggerCharacters) == 0 {
+		s.triggerChars = []string{".", ":", "/", "_"}
+	} else {
+		s.triggerChars = append([]string{}, opts.TriggerCharacters...)
+	}
+	return s
 }
 
 func (s *Server) Run() error {
-- 
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