Patch 8.1.0698
Problem:    Clearing the window is used too often, causing the command line
            to be cleared when opening a tab. (Miroslav Koškár)
Solution:   Use NOT_VALID instead of CLEAR.  (suggested by Jason Franklin,
            closes #630)  Also do this for a few other places where clearing
            the screen isn't really needed.
Files:      src/window.c


*** ../vim-8.1.0697/src/window.c        2018-12-22 17:07:45.771347741 +0100
--- src/window.c        2019-01-06 17:06:42.216917047 +0100
***************
*** 1577,1583 ****
      (void)win_comp_pos();             /* recompute window positions */
  
      win_enter(wp, TRUE);
!     redraw_later(CLEAR);
  }
  
  /*
--- 1577,1583 ----
      (void)win_comp_pos();             /* recompute window positions */
  
      win_enter(wp, TRUE);
!     redraw_all_later(NOT_VALID);
  }
  
  /*
***************
*** 1660,1666 ****
        (void)win_comp_pos();
      }
  
!     redraw_later(CLEAR);
  }
  
  /*
--- 1660,1666 ----
        (void)win_comp_pos();
      }
  
!     redraw_all_later(NOT_VALID);
  }
  
  /*
***************
*** 1817,1823 ****
            frame_new_height(topfr, height, FALSE, FALSE);
            topfr->fr_win->w_wincol = col;
            frame_new_width(topfr, width, FALSE, FALSE);
!           redraw_all_later(CLEAR);
        }
      }
      else if (topfr->fr_layout == FR_ROW)
--- 1817,1823 ----
            frame_new_height(topfr, height, FALSE, FALSE);
            topfr->fr_win->w_wincol = col;
            frame_new_width(topfr, width, FALSE, FALSE);
!           redraw_all_later(NOT_VALID);
        }
      }
      else if (topfr->fr_layout == FR_ROW)
***************
*** 3702,3708 ****
        entering_window(curwin);
  #endif
  
!       redraw_all_later(CLEAR);
        apply_autocmds(EVENT_WINNEW, NULL, NULL, FALSE, curbuf);
        apply_autocmds(EVENT_WINENTER, NULL, NULL, FALSE, curbuf);
        apply_autocmds(EVENT_TABNEW, NULL, NULL, FALSE, curbuf);
--- 3702,3708 ----
        entering_window(curwin);
  #endif
  
!       redraw_all_later(NOT_VALID);
        apply_autocmds(EVENT_WINNEW, NULL, NULL, FALSE, curbuf);
        apply_autocmds(EVENT_WINENTER, NULL, NULL, FALSE, curbuf);
        apply_autocmds(EVENT_TABNEW, NULL, NULL, FALSE, curbuf);
***************
*** 3939,3945 ****
  
      last_status(FALSE);               /* status line may appear or disappear 
*/
      (void)win_comp_pos();     /* recompute w_winrow for all windows */
-     must_redraw = CLEAR;      /* need to redraw everything */
  #ifdef FEAT_DIFF
      diff_need_scrollbind = TRUE;
  #endif
--- 3939,3944 ----
***************
*** 3973,3979 ****
            apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf);
      }
  
!     redraw_all_later(CLEAR);
  }
  
  /*
--- 3972,3978 ----
            apply_autocmds(EVENT_BUFENTER, NULL, NULL, FALSE, curbuf);
      }
  
!     redraw_all_later(NOT_VALID);
  }
  
  /*
***************
*** 6569,6575 ****
        win_comp_pos();
        if (wp != NULL && close_curwin)
            win_goto(wp);
!       redraw_all_later(CLEAR);
      }
      clear_snapshot(curtab, idx);
  }
--- 6568,6574 ----
        win_comp_pos();
        if (wp != NULL && close_curwin)
            win_goto(wp);
!       redraw_all_later(NOT_VALID);
      }
      clear_snapshot(curtab, idx);
  }
*** ../vim-8.1.0697/src/version.c       2019-01-06 16:23:29.499325079 +0100
--- src/version.c       2019-01-06 17:04:09.853949947 +0100
***************
*** 801,802 ****
--- 801,804 ----
  {   /* Add new patch number below this line */
+ /**/
+     698,
  /**/

-- 
Two percent of zero is almost nothing.

 /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net   \\\
///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\  an exciting new programming language -- http://www.Zimbu.org        ///
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