feat: toggle view of multi selections

doc/telescope-file-browser.txt

@@ -265,6 +265,17 @@ fb_actions.select_all({prompt_bufnr})                *fb_actions.select_all()*
         {prompt_bufnr} (number)  The prompt bufnr
 
 
+fb_actions.toggle_selections({prompt_bufnr})  *fb_actions.toggle_selections()*
+    Toggle between view of multi-selections and previous browser.
+    - Note:
+      - WARNING: many |fb_actions| might not work.
+      - De-selections are persisted to other finders!
+
+
+    Parameters: ~
+        {prompt_bufnr} (number)  The prompt bufnr
+
+
 
 ================================================================================
                                                 *telescope-file-browser.finders*

lua/telescope/_extensions/file_browser.lua

@@ -73,6 +73,7 @@ local pconf = {
       ["<C-s>"] = fb_actions.goto_home_dir,
       ["<C-t>"] = fb_actions.change_cwd,
       ["<C-y>"] = fb_actions.copy_file,
+      ["<C-k>"] = fb_actions.toggle_selections,
     },
     ["n"] = {
       ["dd"] = fb_actions.remove_file,
@@ -87,6 +88,7 @@ local pconf = {
       ["s"] = fb_actions.goto_home_dir,
       ["t"] = fb_actions.change_cwd,
       ["y"] = fb_actions.copy_file,
+      ["k"] = fb_actions.toggle_selections,
     },
   },
   attach_mappings = function(prompt_bufnr, _)

lua/telescope/_extensions/file_browser/actions.lua

@@ -506,5 +506,47 @@ fb_actions.select_all = function(prompt_bufnr)
   end)
 end
 
+--- Toggle between view of multi-selections and previous browser.
+--- - Note:
+---   - WARNING: many |fb_actions| might not work.
+---   - De-selections are persisted to other finders!
+---@param prompt_bufnr number: The prompt bufnr
+fb_actions.toggle_selections = function(prompt_bufnr)
+  local current_picker = action_state.get_current_picker(prompt_bufnr)
+  if current_picker._cached_finder == nil then
+    local finder = current_picker.finder
+    current_picker._cached_finder = current_picker.finder
+    local selections = current_picker:get_multi_selection()
+    local entries = {}
+    for _, sel in ipairs(selections) do
+      table.insert(entries, sel.value)
+    end
+    local make_entry = finder.entry_maker
+    local new_finder = require("telescope.finders").new_table {
+      results = entries,
+      entry_maker = make_entry { cwd = vim.loop.cwd() },
+    }
+    if current_picker.prompt_border then
+      current_picker.prompt_border:change_title "File Browser: Multi Selections"
+    end
+    if current_picker.results_border then
+      current_picker.results_border:change_title(vim.loop.cwd())
+    end
+    current_picker:refresh(new_finder, { reset_prompt = true, multi = current_picker._multi })
+  else
+    local finder = current_picker._cached_finder
+    current_picker._cached_finder = nil
+    if current_picker.prompt_border then
+      local new_title = finder.files and "File Browser" or "Folder Browser"
+      current_picker.prompt_border:change_title(new_title)
+    end
+    if current_picker.results_border then
+      local new_title = finder.files and Path:new(finder.path):make_relative(vim.loop.cwd()) .. os_sep or finder.cwd
+      current_picker.results_border:change_title(new_title)
+    end
+    current_picker:refresh(finder, { reset_prompt = true, multi = current_picker._multi })
+  end
+end
+
 fb_actions = transform_mod(fb_actions)
 return fb_actions