feat(jumplist): add select_last_used option

just like buffers picker has select_current option (#2918)

Author: atusy

doc/telescope.txt

@@ -1537,8 +1537,10 @@ builtin.jumplist({opts})                        *telescope.builtin.jumplist()*
         {opts} (table)  options to pass to the picker
 
     Options: ~
-        {show_line} (boolean)  show results text (default: true)
-        {trim_text} (boolean)  trim results text (default: false)
+        {show_line}        (boolean)  show results text (default: true)
+        {trim_text}        (boolean)  trim results text (default: false)
+        {select_last_used} (boolean)  select last used jump position
+                                      (default: false)
 
 
 builtin.lsp_references({opts})            *telescope.builtin.lsp_references()*

lua/telescope/builtin/__internal.lua

@@ -1424,27 +1424,38 @@ end
 
 internal.jumplist = function(opts)
   opts = opts or {}
-  local jumplist = vim.fn.getjumplist()[1]
-
-  -- reverse the list
-  local sorted_jumplist = {}
-  for i = #jumplist, 1, -1 do
-    if vim.api.nvim_buf_is_valid(jumplist[i].bufnr) then
-      jumplist[i].text = vim.api.nvim_buf_get_lines(jumplist[i].bufnr, jumplist[i].lnum - 1, jumplist[i].lnum, false)[1]
-        or ""
-      table.insert(sorted_jumplist, jumplist[i])
+  local jumplist = vim.fn.getjumplist()
+  local locations = jumplist[1]
+  local lastidx = jumplist[2] + 1
+
+  -- reverse the list and determine the defeault selection
+  local sorted_locations = {}
+  local default_selection_idx = 1
+  for i = #locations, 1, -1 do
+    if vim.api.nvim_buf_is_valid(locations[i].bufnr) then
+      locations[i].text = vim.api.nvim_buf_get_lines(
+        locations[i].bufnr,
+        locations[i].lnum - 1,
+        locations[i].lnum,
+        false
+      )[1] or ""
+      table.insert(sorted_locations, locations[i])
+      if opts.select_last_used and i == lastidx then
+        default_selection_idx = #sorted_locations
+      end
     end
   end
 
   pickers
     .new(opts, {
       prompt_title = "Jumplist",
       finder = finders.new_table {
-        results = sorted_jumplist,
+        results = sorted_locations,
         entry_maker = make_entry.gen_from_quickfix(opts),
       },
       previewer = conf.qflist_previewer(opts),
       sorter = conf.generic_sorter(opts),
+      default_selection_index = default_selection_idx,
     })
     :find()
 end