vim-patch:8.2.{4692,4691,4690}: fix Insert mode <LeftDrag> mapping bug (#17999)

vim-patch:8.2.4692: no test for what 8.2.4691 fixes

Problem:    No test for what 8.2.4691 fixes.
Solution:   Add a test.  Use a more generic sotlution. (closes vim/vim#10090)
https://github.com/vim/vim/commit/0f68e6c07aaf62c034a242f183b93c1bb44e7f93

Test cannot be used because it must use test_setmouse(). Use a Lua test.

Reverted patches:

vim-patch:8.2.4691: solution for <Cmd> in a mapping causes trouble

Problem:    Solution for <Cmd> in a mapping causes trouble.
Solution:   Use another solution: put back CTRL-O after reading the <Cmd>
            sequence.
https://github.com/vim/vim/commit/ca9d8d2cb9fc6b9240f2a74ccd36f9d966488294

vim-patch:8.2.4689: using <Cmd> in a mapping does not work for mouse keys

Problem:    Using <Cmd> in a mapping does not work for mouse keys in Insert
            mode. (Sergey Vlasov)
Solution:   When reading the <Cmd> argument do not use the stuff buffer.
            (closes vim/vim#10080)
https://github.com/vim/vim/commit/d0fb2d804183c2786578b4c32ba5b92938f93d0e

1 files changed, 6 insertions, 3 deletions

diff --git a/src/nvim/normal.c b/src/nvim/normal.c
index 5e46bd468d..9cee2de0c5 100644
--- a/src/nvim/normal.c
+++ b/src/nvim/normal.c
@@ -1517,9 +1517,12 @@ bool do_mouse(oparg_T *oap, int c, int dir, long count, bool fixindent)
   for (;;) {
     which_button = get_mouse_button(KEY2TERMCAP1(c), &is_click, &is_drag);
     if (is_drag) {
-      /* If the next character is the same mouse event then use that
-       * one. Speeds up dragging the status line. */
-      if (vpeekc() != NUL) {
+      // If the next character is the same mouse event then use that
+      // one. Speeds up dragging the status line.
+      // Note: Since characters added to the stuff buffer in the code
+      // below need to come before the next character, do not do this
+      // when the current character was stuffed.
+      if (!KeyStuffed && vpeekc() != NUL) {
         int nc;
         int save_mouse_grid = mouse_grid;
         int save_mouse_row = mouse_row;