Patch 8.1.0218
Problem:    Cannot add matches to another window. (Qiming Zhao)
Solution:   Add the "window" argument to matchadd() and matchaddpos().
            (closes #3260)
Files:      src/evalfunc.c, runtime/doc/eval.txt, src/testdir/test_match.vim


*** ../vim-8.1.0217/src/evalfunc.c      2018-07-27 22:08:54.084115114 +0200
--- src/evalfunc.c      2018-07-28 16:38:54.045497084 +0200
***************
*** 7988,7993 ****
--- 7988,8023 ----
      find_some_match(argvars, rettv, MATCH_MATCH);
  }
  
+ #ifdef FEAT_SEARCH_EXTRA
+     static int
+ matchadd_dict_arg(typval_T *tv, char_u **conceal_char, win_T **win)
+ {
+     dictitem_T *di;
+ 
+     if (tv->v_type != VAR_DICT)
+     {
+       EMSG(_(e_dictreq));
+       return FAIL;
+     }
+ 
+     if (dict_find(tv->vval.v_dict, (char_u *)"conceal", -1) != NULL)
+       *conceal_char = get_dict_string(tv->vval.v_dict,
+                                                  (char_u *)"conceal", FALSE);
+ 
+     if ((di = dict_find(tv->vval.v_dict, (char_u *)"window", -1)) != NULL)
+     {
+       *win = find_win_by_nr(&di->di_tv, NULL);
+       if (*win == NULL)
+       {
+           EMSG(_("E957: Invalid window number"));
+           return FAIL;
+       }
+     }
+ 
+     return OK;
+ }
+ #endif
+ 
  /*
   * "matchadd()" function
   */
***************
*** 8002,8007 ****
--- 8032,8038 ----
      int               id = -1;
      int               error = FALSE;
      char_u    *conceal_char = NULL;
+     win_T     *win = curwin;
  
      rettv->vval.v_number = -1;
  
***************
*** 8013,8030 ****
        if (argvars[3].v_type != VAR_UNKNOWN)
        {
            id = (int)get_tv_number_chk(&argvars[3], &error);
!           if (argvars[4].v_type != VAR_UNKNOWN)
!           {
!               if (argvars[4].v_type != VAR_DICT)
!               {
!                   EMSG(_(e_dictreq));
!                   return;
!               }
!               if (dict_find(argvars[4].vval.v_dict,
!                                            (char_u *)"conceal", -1) != NULL)
!                   conceal_char = get_dict_string(argvars[4].vval.v_dict,
!                                                 (char_u *)"conceal", FALSE);
!           }
        }
      }
      if (error == TRUE)
--- 8044,8052 ----
        if (argvars[3].v_type != VAR_UNKNOWN)
        {
            id = (int)get_tv_number_chk(&argvars[3], &error);
!           if (argvars[4].v_type != VAR_UNKNOWN
!               && matchadd_dict_arg(&argvars[4], &conceal_char, &win) == FAIL)
!               return;
        }
      }
      if (error == TRUE)
***************
*** 8035,8041 ****
        return;
      }
  
!     rettv->vval.v_number = match_add(curwin, grp, pat, prio, id, NULL,
                                                                conceal_char);
  #endif
  }
--- 8057,8063 ----
        return;
      }
  
!     rettv->vval.v_number = match_add(win, grp, pat, prio, id, NULL,
                                                                conceal_char);
  #endif
  }
***************
*** 8054,8059 ****
--- 8076,8082 ----
      int               error = FALSE;
      list_T    *l;
      char_u    *conceal_char = NULL;
+     win_T     *win = curwin;
  
      rettv->vval.v_number = -1;
  
***************
*** 8076,8093 ****
        if (argvars[3].v_type != VAR_UNKNOWN)
        {
            id = (int)get_tv_number_chk(&argvars[3], &error);
!           if (argvars[4].v_type != VAR_UNKNOWN)
!           {
!               if (argvars[4].v_type != VAR_DICT)
!               {
!                   EMSG(_(e_dictreq));
!                   return;
!               }
!               if (dict_find(argvars[4].vval.v_dict,
!                                            (char_u *)"conceal", -1) != NULL)
!                   conceal_char = get_dict_string(argvars[4].vval.v_dict,
!                                                 (char_u *)"conceal", FALSE);
!           }
        }
      }
      if (error == TRUE)
--- 8099,8108 ----
        if (argvars[3].v_type != VAR_UNKNOWN)
        {
            id = (int)get_tv_number_chk(&argvars[3], &error);
! 
!           if (argvars[4].v_type != VAR_UNKNOWN
!               && matchadd_dict_arg(&argvars[4], &conceal_char, &win) == FAIL)
!               return;
        }
      }
      if (error == TRUE)
***************
*** 8100,8106 ****
        return;
      }
  
!     rettv->vval.v_number = match_add(curwin, group, NULL, prio, id, l,
                                                                conceal_char);
  #endif
  }
--- 8115,8121 ----
        return;
      }
  
!     rettv->vval.v_number = match_add(win, group, NULL, prio, id, l,
                                                                conceal_char);
  #endif
  }
*** ../vim-8.1.0217/runtime/doc/eval.txt        2018-07-15 17:01:06.361425488 
+0200
--- runtime/doc/eval.txt        2018-07-28 16:54:21.839764726 +0200
***************
*** 6015,6021 ****
                the pattern.  'smartcase' is NOT used.  The matching is always
                done like 'magic' is set and 'cpoptions' is empty.
  
!                                       *matchadd()* *E798* *E799* *E801*
  matchadd({group}, {pattern} [, {priority} [, {id} [, {dict}]]])
                Defines a pattern to be highlighted in the current window (a
                "match").  It will be highlighted with {group}.  Returns an
--- 6016,6022 ----
                the pattern.  'smartcase' is NOT used.  The matching is always
                done like 'magic' is set and 'cpoptions' is empty.
  
!                               *matchadd()* *E798* *E799* *E801* *E957*
  matchadd({group}, {pattern} [, {priority} [, {id} [, {dict}]]])
                Defines a pattern to be highlighted in the current window (a
                "match").  It will be highlighted with {group}.  Returns an
***************
*** 6054,6059 ****
--- 6055,6062 ----
                        conceal     Special character to show instead of the
                                    match (only for |hl-Conceal| highlighted
                                    matches, see |:syn-cchar|)
+                       window      Instead of the current window use the
+                                   window with this number or window ID.
  
                The number of matches is not limited, as it is the case with
                the |:match| commands.
*** ../vim-8.1.0217/src/testdir/test_match.vim  2017-09-14 14:16:37.000000000 
+0200
--- src/testdir/test_match.vim  2018-07-28 16:51:59.280637174 +0200
***************
*** 192,197 ****
--- 192,219 ----
    set hlsearch&
  endfunc
  
+ func Test_matchaddpos_otherwin()
+   syntax on
+   new
+   call setline(1, ['12345', 'NP'])
+   let winid = win_getid()
+ 
+   wincmd w
+   call matchadd('Search', '4', 10, -1, {'window': winid})
+   call matchaddpos('Error', [[1,2], [2,2]], 10, -1, {'window': winid})
+   redraw!
+   call assert_notequal(screenattr(1,2), 0)
+   call assert_notequal(screenattr(1,4), 0)
+   call assert_notequal(screenattr(2,2), 0)
+   call assert_equal(screenattr(1,2), screenattr(2,2))
+   call assert_notequal(screenattr(1,2), screenattr(1,4))
+ 
+   wincmd w
+   bwipe!
+   call clearmatches()
+   syntax off
+ endfunc
+ 
  func Test_matchaddpos_using_negative_priority()
    set hlsearch
  
*** ../vim-8.1.0217/src/version.c       2018-07-28 16:14:26.131040141 +0200
--- src/version.c       2018-07-28 16:40:26.416917394 +0200
***************
*** 800,801 ****
--- 800,803 ----
  {   /* Add new patch number below this line */
+ /**/
+     218,
  /**/

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