update

lua/util/open-docs-in-split.lua

@@ -0,0 +1,44 @@
+function open_doc_in_vsplit()
+	local word = vim.fn.expand("<cword>")
+	if word == "" then
+		vim.notify("No word under cursor", vim.log.levels.INFO)
+		return
+	end
+
+	-- Try to get LSP hover documentation
+	local params = vim.lsp.util.make_position_params()
+	local results = vim.lsp.buf_request_sync(0, "textDocument/hover", params, 1000) or {}
+	local doc_lines = nil
+
+	for _, res in pairs(results) do
+		local contents = res.result and res.result.contents
+		if contents then
+			doc_lines = vim.lsp.util.convert_input_to_markdown_lines(contents)
+			doc_lines = vim.lsp.util.trim_empty_lines(doc_lines)
+			if #doc_lines > 0 then
+				break
+			end
+		end
+	end
+
+	if doc_lines and #doc_lines > 0 then
+		-- Open a new vertical split for LSP hover documentation
+		vim.cmd("vnew")
+		local bufnr = vim.api.nvim_get_current_buf()
+		-- Set the buffer to unmodifiable scratch buffer
+		vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, doc_lines)
+		vim.bo[bufnr].modifiable = false
+		vim.bo[bufnr].bufhidden = "wipe"
+		vim.bo[bufnr].filetype = "markdown"
+		return
+	end
+
+	-- Fallback to vim help command
+	local help_cmd = "vertical help " .. word
+	local ok, _ = pcall(vim.cmd, help_cmd)
+	if not ok then
+		vim.notify("No documentation available for '" .. word .. "'", vim.log.levels.INFO)
+	end
+end
+
+return open_doc_in_vsplit