Patch 8.2.4591
Problem:    Cursor line not updated when a callback moves the cursor.
Solution:   Check if the cursor moved. (closes #9970)
Files:      src/main.c, src/drawscreen.c, src/proto/drawscreen.pro,
            src/testdir/test_cursorline.vim,
            src/testdir/dumps/Test_cursorline_callback_1.dump


*** ../vim-8.2.4590/src/main.c  2022-02-07 10:45:12.799027338 +0000
--- src/main.c  2022-03-19 10:28:02.827123400 +0000
***************
*** 1386,1397 ****
  
  #ifdef FEAT_SYN_HL
            // Might need to update for 'cursorline'.
!           // When 'cursorlineopt' is "screenline" need to redraw always.
!           if (curwin->w_p_cul
!                   && (curwin->w_last_cursorline != curwin->w_cursor.lnum
!                       || (curwin->w_p_culopt_flags & CULOPT_SCRLINE))
!                   && !char_avail())
!               redraw_later(VALID);
  #endif
            if (VIsual_active)
                update_curbuf(INVERTED); // update inverted part
--- 1386,1392 ----
  
  #ifdef FEAT_SYN_HL
            // Might need to update for 'cursorline'.
!           check_redraw_cursorline();
  #endif
            if (VIsual_active)
                update_curbuf(INVERTED); // update inverted part
*** ../vim-8.2.4590/src/drawscreen.c    2022-02-16 19:24:03.618162413 +0000
--- src/drawscreen.c    2022-03-19 11:08:37.504059993 +0000
***************
*** 1463,1473 ****
  #ifdef FEAT_SYN_HL
      // remember what happened to the previous line, to know if
      // check_visual_highlight() can be used
! #define DID_NONE 1    // didn't update a line
! #define DID_LINE 2    // updated a normal line
! #define DID_FOLD 3    // updated a folded line
      int               did_update = DID_NONE;
      linenr_T  syntax_last_parsed = 0;         // last parsed text line
  #endif
      linenr_T  mod_top = 0;
      linenr_T  mod_bot = 0;
--- 1463,1476 ----
  #ifdef FEAT_SYN_HL
      // remember what happened to the previous line, to know if
      // check_visual_highlight() can be used
! # define DID_NONE 1   // didn't update a line
! # define DID_LINE 2   // updated a normal line
! # define DID_FOLD 3   // updated a folded line
      int               did_update = DID_NONE;
      linenr_T  syntax_last_parsed = 0;         // last parsed text line
+     // remember the current w_last_cursorline, it changes when drawing the new
+     // cursor line
+     linenr_T  last_cursorline = wp->w_last_cursorline;
  #endif
      linenr_T  mod_top = 0;
      linenr_T  mod_bot = 0;
***************
*** 2244,2250 ****
                                ))))
  #ifdef FEAT_SYN_HL
                || (wp->w_p_cul && (lnum == wp->w_cursor.lnum
!                                            || lnum == wp->w_last_cursorline))
  #endif
                                )
        {
--- 2247,2253 ----
                                ))))
  #ifdef FEAT_SYN_HL
                || (wp->w_p_cul && (lnum == wp->w_cursor.lnum
!                                                  || lnum == last_cursorline))
  #endif
                                )
        {
***************
*** 3027,3032 ****
--- 3030,3052 ----
  }
  #endif
  
+ #if defined(FEAT_SYN_HL) || defined(PROTO)
+ /*
+  * Check if the cursor moved and 'cursorline' is set.  Mark for a VALID redraw
+  * if needed.
+  */
+     void
+ check_redraw_cursorline(void)
+ {
+     // When 'cursorlineopt' is "screenline" need to redraw always.
+     if (curwin->w_p_cul
+           && (curwin->w_last_cursorline != curwin->w_cursor.lnum
+               || (curwin->w_p_culopt_flags & CULOPT_SCRLINE))
+           && !char_avail())
+       redraw_later(VALID);
+ }
+ #endif
+ 
  /*
   * Invoked after an asynchronous callback is called.
   * If an echo command was used the cursor needs to be put back where
***************
*** 3071,3076 ****
--- 3091,3100 ----
      }
      else if (State & (NORMAL | INSERT | TERMINAL))
      {
+ #ifdef FEAT_SYN_HL
+       // might need to update for 'cursorline'
+       check_redraw_cursorline();
+ #endif
        // keep the command line if possible
        update_screen(VALID_NO_UPDATE);
        setcursor();
*** ../vim-8.2.4590/src/proto/drawscreen.pro    2021-12-09 10:50:48.566865615 
+0000
--- src/proto/drawscreen.pro    2022-03-19 10:42:44.704940869 +0000
***************
*** 8,13 ****
--- 8,14 ----
  void update_debug_sign(buf_T *buf, linenr_T lnum);
  void updateWindow(win_T *wp);
  int redraw_asap(int type);
+ void check_redraw_cursorline(void);
  void redraw_after_callback(int call_update_screen, int do_message);
  void redraw_later(int type);
  void redraw_win_later(win_T *wp, int type);
*** ../vim-8.2.4590/src/testdir/test_cursorline.vim     2022-02-10 
19:51:42.545569904 +0000
--- src/testdir/test_cursorline.vim     2022-03-19 11:05:42.328868001 +0000
***************
*** 247,250 ****
--- 247,276 ----
    call delete('Xtextfile')
  endfunc
  
+ func Test_cursorline_callback()
+   CheckScreendump
+   CheckFeature timers
+ 
+   let lines =<< trim END
+       call setline(1, ['aaaaa', 'bbbbb', 'ccccc', 'ddddd'])
+       set cursorline
+       call cursor(4, 1)
+ 
+       func Func(timer)
+         call cursor(2, 1)
+       endfunc
+ 
+       call timer_start(300, 'Func')
+   END
+   call writefile(lines, 'Xcul_timer')
+ 
+   let buf = RunVimInTerminal('-S Xcul_timer', #{rows: 8})
+   call TermWait(buf, 310)
+   call VerifyScreenDump(buf, 'Test_cursorline_callback_1', {})
+ 
+   call StopVimInTerminal(buf)
+   call delete('Xcul_timer')
+ endfunc
+ 
+ 
  " vim: shiftwidth=2 sts=2 expandtab
*** ../vim-8.2.4590/src/testdir/dumps/Test_cursorline_callback_1.dump   
2022-03-19 11:09:13.427901313 +0000
--- src/testdir/dumps/Test_cursorline_callback_1.dump   2022-03-19 
11:05:59.760784736 +0000
***************
*** 0 ****
--- 1,8 ----
+ |a+0&#ffffff0@4| @69
+ >b+8&&@4| @69
+ |c+0&&@4| @69
+ |d@4| @69
+ |~+0#4040ff13&| @73
+ |~| @73
+ |~| @73
+ | +0#0000000&@56|4|,|1| @10|A|l@1| 
*** ../vim-8.2.4590/src/version.c       2022-03-18 21:41:43.816964266 +0000
--- src/version.c       2022-03-19 10:29:31.602911371 +0000
***************
*** 752,753 ****
--- 752,755 ----
  {   /* Add new patch number below this line */
+ /**/
+     4591,
  /**/

-- 
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