Re-add the FZF as experimental

autoload/phpactor/input/list.vim

@@ -9,6 +9,49 @@ function! phpactor#input#list#inputlist(label, choices, multi, ResultHandler)
     call a:ResultHandler(a:choices[choice - 1])
 endfunction
 
+" expreimental: this stategy currently does not work when used in a 
+" non-terminal RPC step - https://github.com/phpactor/phpactor/issues/845
+function! phpactor#input#list#fzf(label, choices, multi, ResultHandler)
+    let options = [
+        \ '--tiebreak=index',
+        \ '--layout=reverse-list',
+    \ ]
+    let sink = {
+        \ 'sink': {key -> a:ResultHandler(a:choices[key - 1])},
+    \ }
+
+    if a:multi
+        call extend(options, [
+            \ '--multi',
+            \ '--bind=ctrl-a:select-all,ctrl-d:deselect-all',
+        \ ])
+
+        let sink = {
+            \ 'sink*': {results -> a:ResultHandler(map(
+                \ results,
+                \ {key, value -> a:choices[value - 1]}
+            \ ))}
+        \ }
+    endif
+
+    " sink works because "key" is converted to integer, so only the number is kept
+    call fzf#run(extend({
+        \ 'source': s:add_number_to_choices(a:choices),
+        \ 'down': '30%',
+        \ 'options': options
+    \ }, sink))
+endfunction
+
+function! s:auto_detect_strategy()
+    let strategy = 'inputlist'
+
+    if get(g:, 'loaded_fzf', 0)
+        let strategy = 'fzf'
+    endif
+
+    return 'phpactor#input#list#'. strategy
+endfunction
+
 function! s:add_number_to_choices(choices)
     return map(copy(a:choices), {key, value -> key + 1 .') '. value})
 endfunction