Update to new handler signatures (#22)

* Update handler signatures

Closes #20

* Make changes compatible with Neovim < 0.5.1

README.md

@@ -7,18 +7,11 @@ It works by redefining LSP handlers so that they call FZF. Therefore you don't
 need to change any of your exising LSP mappings. It's also small and written
 entirely in Lua.
 
-The plugin is compatible only with Neovim 0.5+. **If you're using Neovim master,
-please check out the `dev` branch** (due to
-[breaking changes](https://github.com/neovim/neovim/pull/15504) to LSP
-handlers).
+The plugin is compatible only with Neovim 0.5+.
 
 ![demo](./demo.gif)
 
 ## Installation
-**If you're using Neovim master, please check out the `dev` branch** (due to
-[breaking changes](https://github.com/neovim/neovim/pull/15504) to LSP
-handlers).
-
 With [packer.nvim](https://github.com/wbthomason/packer.nvim):
 ```lua
 use {

lua/lspfuzzy.lua

@@ -143,8 +143,8 @@ local function fzf(source, sink, label, preview, multi)
 end
 
 -------------------- LSP HANDLERS --------------------------
-local function symbol_handler(label, result, _, bufnr)
-  local items = lsp.util.symbols_to_items(result, bufnr)
+local function symbol_handler(label, result, ctx)
+  local items = lsp.util.symbols_to_items(result, ctx.bufnr)
   local source = vim.tbl_map(lsp_to_fzf, items)
   fzf(source, jump, label, true, true)
 end
@@ -234,7 +234,7 @@ local handlers = {
 }
 
 local function wrap_handler(handler)
-  return function(err, method, result, client_id, bufnr, config)
+  local wrapper = function(err, result, ctx, config)
     if err then
       return echo('ErrorMsg', err.message)
     end
@@ -243,8 +243,18 @@ local function wrap_handler(handler)
       return echo('None', fmt('No %s found', string.lower(handler.label)))
     end
 
-    return handler.target(handler.label, result, client_id, bufnr, config)
+    return handler.target(handler.label, result, ctx, config)
   end
+
+  -- See neovim#15504
+  if not fn.has('nvim-0.5.1') then
+    return function(err, method, result, client_id, bufnr, config)
+      local ctx = {method = method, client_id = client_id, bufnr = bufnr}
+      return wrapper(err, result, ctx, config)
+    end
+  end
+
+  return wrapper
 end
 
 local function load_fzf_opts()