vim-patch:8.0.0110 (#5700)

Closes #5616

Problem:    Drop command doesn't use existing window.
Solution:   Check the window width properly. (Hirohito Higashi)

5a030a540f

src/nvim/buffer.c

@@ -4149,12 +4149,10 @@ do_arg_all (
       wpnext = wp->w_next;
       buf = wp->w_buffer;
       if (buf->b_ffname == NULL
-          || (!keep_tabs && buf->b_nwindows > 1)
-          || wp->w_width != Columns
-          )
+          || (!keep_tabs && (buf->b_nwindows > 1 || wp->w_width != Columns))) {
         i = opened_len;
-      else {
-        /* check if the buffer in this window is in the arglist */
+      } else {
+        // check if the buffer in this window is in the arglist
         for (i = 0; i < opened_len; ++i) {
           if (i < alist->al_ga.ga_len
               && (AARGLIST(alist)[i].ae_fnum == buf->b_fnum

src/nvim/testdir/test_tabpage.vim

@@ -40,7 +40,7 @@ function Test_tabpage()
   call assert_true(t:val_num == 100 && t:val_str == 'SetTabVar test'  && t:val_list == ['red', 'blue', 'green'])
   tabclose
 
-  if has('gui') || has('clientserver')
+  if has('nvim') || has('gui') || has('clientserver')
     " Test for ":tab drop exist-file" to keep current window.
     sp test1
     tab drop test1
@@ -64,6 +64,15 @@ function Test_tabpage()
     call assert_true(tabpagenr() == 2 && tabpagewinnr(2, '$') == 2 && tabpagewinnr(2) == 1)
     tabclose
     q
+    "
+    "
+    " Test for ":tab drop vertical-split-window" to jump test1 buffer
+    tabedit test1
+    vnew
+    tabfirst
+    tab drop test1
+    call assert_equal([2, 2, 2, 2], [tabpagenr('$'), tabpagenr(), tabpagewinnr(2, '$'), tabpagewinnr(2)])
+    1tabonly
   endif
   "
   "