vim-patch:8.0.0548: saving the redo buffer only works one time (#8629)

Problem:    Saving the redo buffer only works one time, resulting in the "."
            command not working well for a function call inside another
            function call. (Ingo Karkat)
Solution:   Save the redo buffer at every user function call. (closes vim/vim#1619)
d4863aa99e

src/nvim/buffer_defs.h

@@ -143,6 +143,12 @@ struct buffheader {
   size_t bh_space;          // space in bh_curr for appending
 };
 
+typedef struct
+{
+  buffheader_T sr_redobuff;
+  buffheader_T sr_old_redobuff;
+} save_redo_T;
+
 /*
  * Structure that contains all options that are local to a window.
  * Used twice in a window: for the current buffer and for all buffers.

src/nvim/eval.c

@@ -21174,6 +21174,7 @@ void call_user_func(ufunc_T *fp, int argcount, typval_T *argvars,
   proftime_T wait_start;
   proftime_T call_start;
   bool did_save_redo = false;
+  save_redo_T save_redo;
 
   /* If depth of calling is getting too high, don't execute the function */
   if (depth >= p_mfd) {
@@ -21186,7 +21187,7 @@ void call_user_func(ufunc_T *fp, int argcount, typval_T *argvars,
   // Save search patterns and redo buffer.
   save_search_patterns();
   if (!ins_compl_active()) {
-    saveRedobuff();
+    saveRedobuff(&save_redo);
     did_save_redo = true;
   }
   ++fp->uf_calls;
@@ -21501,7 +21502,7 @@ void call_user_func(ufunc_T *fp, int argcount, typval_T *argvars,
   }
   // restore search patterns and redo buffer
   if (did_save_redo) {
-    restoreRedobuff();
+    restoreRedobuff(&save_redo);
   }
   restore_search_patterns();
 }

src/nvim/fileio.c

@@ -6696,6 +6696,7 @@ static bool apply_autocmds_group(event_T event, char_u *fname, char_u *fname_io,
   static int filechangeshell_busy = FALSE;
   proftime_T wait_time;
   bool did_save_redobuff = false;
+  save_redo_T save_redo;
 
   // Quickly return if there are no autocommands for this event or
   // autocommands are blocked.
@@ -6876,7 +6877,7 @@ static bool apply_autocmds_group(event_T event, char_u *fname, char_u *fname_io,
   if (!autocmd_busy) {
     save_search_patterns();
     if (!ins_compl_active()) {
-      saveRedobuff();
+      saveRedobuff(&save_redo);
       did_save_redobuff = true;
     }
     did_filetype = keep_filetype;
@@ -6965,7 +6966,7 @@ static bool apply_autocmds_group(event_T event, char_u *fname, char_u *fname_io,
   if (!autocmd_busy) {
     restore_search_patterns();
     if (did_save_redobuff) {
-      restoreRedobuff();
+      restoreRedobuff(&save_redo);
     }
     did_filetype = FALSE;
     while (au_pending_free_buf != NULL) {

src/nvim/getchar.c

@@ -80,8 +80,6 @@ FileDescriptor *scriptin[NSCRIPT] = { NULL };
 
 static buffheader_T redobuff = { { NULL, { NUL } }, NULL, 0, 0 };
 static buffheader_T old_redobuff = { { NULL, { NUL } }, NULL, 0, 0 };
-static buffheader_T save_redobuff = {{NULL, {NUL}}, NULL, 0, 0};
-static buffheader_T save_old_redobuff = {{NULL, {NUL}}, NULL, 0, 0};
 static buffheader_T recordbuff = { { NULL, { NUL } }, NULL, 0, 0 };
 
 // First read ahead buffer. Used for translated commands.
@@ -480,41 +478,31 @@ void CancelRedo(void)
   }
 }
 
-/*
- * Save redobuff and old_redobuff to save_redobuff and save_old_redobuff.
- * Used before executing autocommands and user functions.
- */
-static int save_level = 0;
-
-void saveRedobuff(void)
+/// Save redobuff and old_redobuff to save_redobuff and save_old_redobuff.
+/// Used before executing autocommands and user functions.
+void saveRedobuff(save_redo_T *save_redo)
 {
-  if (save_level++ == 0) {
-    save_redobuff = redobuff;
+  save_redo->sr_redobuff = redobuff;
   redobuff.bh_first.b_next = NULL;
-    save_old_redobuff = old_redobuff;
+  save_redo->sr_old_redobuff = old_redobuff;
   old_redobuff.bh_first.b_next = NULL;
 
   // Make a copy, so that ":normal ." in a function works.
-    char *const s = (char *)get_buffcont(&save_redobuff, false);
+  char *const s = (char *)get_buffcont(&save_redo->sr_redobuff, false);
   if (s != NULL) {
     add_buff(&redobuff, s, -1L);
     xfree(s);
   }
 }
-}
 
-/*
- * Restore redobuff and old_redobuff from save_redobuff and save_old_redobuff.
- * Used after executing autocommands and user functions.
- */
-void restoreRedobuff(void)
+/// Restore redobuff and old_redobuff from save_redobuff and save_old_redobuff.
+/// Used after executing autocommands and user functions.
+void restoreRedobuff(save_redo_T *save_redo)
 {
-  if (--save_level == 0) {
   free_buff(&redobuff);
-    redobuff = save_redobuff;
+  redobuff = save_redo->sr_redobuff;
   free_buff(&old_redobuff);
-    old_redobuff = save_old_redobuff;
-  }
+  old_redobuff = save_redo->sr_old_redobuff;
 }
 
 /*

src/nvim/testdir/test_functions.vim

@@ -795,3 +795,31 @@ func Test_shellescape()
 
   let &shell = save_shell
 endfunc
+
+func Test_redo_in_nested_functions()
+  nnoremap g. :set opfunc=Operator<CR>g@
+  function Operator( type, ... )
+     let @x = 'XXX'
+     execute 'normal! g`[' . (a:type ==# 'line' ? 'V' : 'v') . 'g`]' . '"xp'
+  endfunction
+
+  function! Apply()
+      5,6normal! .
+  endfunction
+
+  new
+  call setline(1, repeat(['some "quoted" text', 'more "quoted" text'], 3))
+  1normal g.i"
+  call assert_equal('some "XXX" text', getline(1))
+  3,4normal .
+  call assert_equal('some "XXX" text', getline(3))
+  call assert_equal('more "XXX" text', getline(4))
+  call Apply()
+  call assert_equal('some "XXX" text', getline(5))
+  call assert_equal('more "XXX" text', getline(6))
+  bwipe!
+
+  nunmap g.
+  delfunc Operator
+  delfunc Apply
+endfunc