Add hierarchy lsp picker function

lua/navigator/definition.lua

@@ -91,8 +91,8 @@ local function def_preview(timeout_ms, method, client, bufnr)
   local data = {}
 
   for _, value in pairs(result) do
-    if value ~= nil and value.result ~= nil and not vim.tbl_isempty(value.result) then
-      table.insert(data, value.result[1])
+    if value ~= nil and not vim.tbl_isempty(value) then
+      table.insert(data, value[1])
     end
   end
 

lua/navigator/hierarchy.lua

@@ -253,22 +253,34 @@ end
 
 local request = vim.lsp.buf_request
 
+local function pick_hierarchy_lsp_client(bufnr, method)
+  bufnr = bufnr or 0
+  method = method or vim.lsp.protocol.Methods.textDocument_prepareCallHierarchy
+  local file = vim.api.nvim_buf_get_name(bufnr)
+
+  for _, client in ipairs(vim.lsp.get_clients({ bufnr = bufnr, method = method })) do
+    if client.server_capabilities.callHierarchyProvider then
+      local root = client.config and client.config.root_dir
+      if not root or file:find(root, 1, true) == 1 then
+        return client
+      end
+    end
+  end
+  return nil
+end
+
 -- call_hierarchy with floating window
 call_hierarchy = function(method, opts)
   local client = opts.client
   local bufnr = opts.bufnr or vim.api.nvim_get_current_buf()
 
   log(method, opts, client, bufnr)
   if not client then
-    local clients = vim.lsp.get_clients({
-      bufnr = bufnr,
-      method = method,
-    })
-    if not clients or #clients == 0 then
+    client = pick_hierarchy_lsp_client(bufnr, method)
+    if not client then
       vim.notify('no call hierarchy clients found for bufnr')
       return
     end
-    client = clients[1]
   end
   trace(method, opts)
   opts = opts or {}