feat: filtering for dynamic workspace symbols (#1336)

* enable `symbols` filtering opt for builtin.dynamic_workspace_symbols

doc/telescope.txt

@@ -1401,11 +1401,14 @@ builtin.lsp_dynamic_workspace_symbols({opts})*builtin.lsp_dynamic_workspace_symb
         {opts} (table)  options to pass to the picker
 
     Options: ~
-        {ignore_filename}   (boolean)  dont show filenames (default: false)
-        {show_line}         (boolean)  if true, shows the content of the line
-                                       the symbol is found on (default: false)
-        {symbol_highlights} (table)    string -> string. Matches symbol with
-                                       hl_group
+        {ignore_filename}   (boolean)       dont show filenames (default:
+                                            false)
+        {show_line}         (boolean)       if true, shows the content of the
+                                            line the symbol is found on
+                                            (default: false)
+        {symbols}           (string|table)  filter results by symbol kind(s)
+        {symbol_highlights} (table)         string -> string. Matches symbol
+                                            with hl_group
 
 
 builtin.lsp_document_diagnostics({opts})  *builtin.lsp_document_diagnostics()*

lua/telescope/builtin/init.lua

@@ -428,6 +428,7 @@ builtin.lsp_workspace_symbols = require_on_exported_call("telescope.builtin.lsp"
 ---@param opts table: options to pass to the picker
 ---@field ignore_filename boolean: dont show filenames (default: false)
 ---@field show_line boolean: if true, shows the content of the line the symbol is found on (default: false)
+---@field symbols string|table: filter results by symbol kind(s)
 ---@field symbol_highlights table: string -> string. Matches symbol with hl_group
 builtin.lsp_dynamic_workspace_symbols = require_on_exported_call("telescope.builtin.lsp").dynamic_workspace_symbols
 

lua/telescope/builtin/lsp.lua

@@ -381,7 +381,7 @@ lsp.workspace_symbols = function(opts)
   }):find()
 end
 
-local function get_workspace_symbols_requester(bufnr)
+local function get_workspace_symbols_requester(bufnr, opts)
   local cancel = function() end
 
   return function(prompt)
@@ -400,6 +400,9 @@ local function get_workspace_symbols_requester(bufnr)
     assert(not err, err)
 
     local locations = vim.lsp.util.symbols_to_items(results_lsp or {}, bufnr) or {}
+    if not vim.tbl_isempty(locations) then
+      locations = utils.filter_symbols(locations, opts) or {}
+    end
     return locations
   end
 end
@@ -411,7 +414,7 @@ lsp.dynamic_workspace_symbols = function(opts)
     prompt_title = "LSP Dynamic Workspace Symbols",
     finder = finders.new_dynamic {
       entry_maker = opts.entry_maker or make_entry.gen_from_lsp_symbols(opts),
-      fn = get_workspace_symbols_requester(curr_bufnr),
+      fn = get_workspace_symbols_requester(curr_bufnr, opts),
     },
     previewer = conf.qflist_previewer(opts),
     sorter = conf.generic_sorter(opts),