From f2008af7f7ac68234715b0545c26f5bcd86ceea9 Mon Sep 17 00:00:00 2001
From: Danielle McLean <dani@00dani.me>
Date: Sat, 4 Nov 2023 16:45:29 +1100
Subject: [PATCH] Only use LSP features if the server supports them

---
 dot-config/vim/lsp.vim | 41 ++++++++++++++++++++++++++++++++---------
 1 file changed, 32 insertions(+), 9 deletions(-)

diff --git a/dot-config/vim/lsp.vim b/dot-config/vim/lsp.vim
index cee3e52..bf07868 100644
--- a/dot-config/vim/lsp.vim
+++ b/dot-config/vim/lsp.vim
@@ -162,16 +162,39 @@ def ListMissingServers(argLead: string, cmdLine: string, cursorPos: number): lis
 	return MissingServers()->mapnew((_, server): string => server.name)
 enddef
 
+def ServerHas(feature: string): bool
+	return lsp#buffer#CurbufGetServer(feature) != {}
+enddef
+
 def LspBufferSettings(): void
-	setlocal formatexpr=lsp#lsp#FormatExpr()
-	setlocal keywordprg=:LspHover
-	nnoremap <buffer> gD <Cmd>LspGotoDeclaration<CR>
-	nnoremap <buffer> gd <Cmd>LspGotoDefinition<CR>
-	nnoremap <buffer> gi <Cmd>LspGotoImpl<CR>
-	nnoremap <buffer> <C-k> <Cmd>LspShowSignature<CR>
-	nnoremap <buffer> gr <Cmd>LspShowReferences<CR>
-	xnoremap <buffer> <silent> <Leader>e <Cmd>LspSelectionExpand<CR>
-	xnoremap <buffer> <silent> <Leader>s <Cmd>LspSelectionShrink<CR>
+	if ServerHas('documentFormatting')
+		setlocal formatexpr=lsp#lsp#FormatExpr()
+	endif
+
+	if ServerHas('hover')
+		setlocal keywordprg=:LspHover
+	endif
+
+	if ServerHas('declaration')
+		nnoremap <buffer> gD <Cmd>LspGotoDeclaration<CR>
+	endif
+
+	if ServerHas('definition')
+		nnoremap <buffer> gd <Cmd>LspGotoDefinition<CR>
+	endif
+
+	if ServerHas('implementation')
+		nnoremap <buffer> gi <Cmd>LspGotoImpl<CR>
+	endif
+
+	if ServerHas('references')
+		nnoremap <buffer> gr <Cmd>LspShowReferences<CR>
+	endif
+
+	if ServerHas('selectionRange')
+		xnoremap <buffer> <silent> <Leader>e <Cmd>LspSelectionExpand<CR>
+		xnoremap <buffer> <silent> <Leader>s <Cmd>LspSelectionShrink<CR>
+	endif
 enddef
 
 export def Configure(): void