patch 8.1.2273: wrong default when "pos" is changed with popup_atcursor()

Problem:    Wrong default when "pos" is changed with popup_atcursor().
Solution:   Adjust the default line and col when "pos" is not the default
            value. (#5151)
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index a7f80a8..db5fecd 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -4960,7 +4960,7 @@
 	{
 	    wp = popup_find_preview_window();
 	    if (wp != NULL)
-		popup_set_wantpos_cursor(wp, wp->w_minwidth);
+		popup_set_wantpos_cursor(wp, wp->w_minwidth, NULL);
 	}
 	else if (use_popup != USEPOPUP_NONE)
 	{
diff --git a/src/popupwin.c b/src/popupwin.c
index a6e2e87..ac8fff3 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -390,6 +390,25 @@
 }
 #endif
 
+    static poppos_T
+get_pos_entry(dict_T *d, int give_error)
+{
+    char_u  *str = dict_get_string(d, (char_u *)"pos", FALSE);
+    int	    nr;
+
+    if (str == NULL)
+	return POPPOS_NONE;
+
+    for (nr = 0; nr < (int)(sizeof(poppos_entries) / sizeof(poppos_entry_T));
+									  ++nr)
+	if (STRCMP(str, poppos_entries[nr].pp_name) == 0)
+	    return poppos_entries[nr].pp_val;
+
+    if (give_error)
+	semsg(_(e_invarg2), str);
+    return POPPOS_NONE;
+}
+
 /*
  * Shared between popup_create() and f_popup_move().
  */
@@ -420,20 +439,11 @@
     if (di != NULL)
 	wp->w_popup_fixed = dict_get_number(d, (char_u *)"fixed") != 0;
 
-    str = dict_get_string(d, (char_u *)"pos", FALSE);
-    if (str != NULL)
     {
-	for (nr = 0;
-		nr < (int)(sizeof(poppos_entries) / sizeof(poppos_entry_T));
-									  ++nr)
-	    if (STRCMP(str, poppos_entries[nr].pp_name) == 0)
-	    {
-		wp->w_popup_pos = poppos_entries[nr].pp_val;
-		nr = -1;
-		break;
-	    }
-	if (nr != -1)
-	    semsg(_(e_invarg2), str);
+	poppos_T ppt = get_pos_entry(d, TRUE);
+
+	if (ppt != POPPOS_NONE)
+	    wp->w_popup_pos = ppt;
     }
 
     str = dict_get_string(d, (char_u *)"textprop", FALSE);
@@ -512,6 +522,8 @@
 	    else
 		wp->w_popup_lnum = nr;
 	    li = li->li_next;
+	    if (nr == 0)
+		wp->w_popup_curwin = NULL;
 	}
 
 	mincol = tv_get_number(&li->li_tv);
@@ -1634,14 +1646,27 @@
  * Keep at least "width" columns from the right of the screen.
  */
     void
-popup_set_wantpos_cursor(win_T *wp, int width)
+popup_set_wantpos_cursor(win_T *wp, int width, dict_T *d)
 {
+    poppos_T ppt = POPPOS_NONE;
+
+    if (d != NULL)
+	ppt = get_pos_entry(d, FALSE);
+
     setcursor_mayforce(TRUE);
-    wp->w_wantline = curwin->w_winrow + curwin->w_wrow;
-    if (wp->w_wantline == 0)  // cursor in first line
+    if (ppt == POPPOS_TOPRIGHT || ppt == POPPOS_TOPLEFT)
     {
-	wp->w_wantline = 2;
-	wp->w_popup_pos = POPPOS_TOPLEFT;
+	wp->w_wantline = curwin->w_winrow + curwin->w_wrow + 2;
+    }
+    else
+    {
+	wp->w_wantline = curwin->w_winrow + curwin->w_wrow;
+	if (wp->w_wantline == 0)  // cursor in first line
+	{
+	    wp->w_wantline = 2;
+	    wp->w_popup_pos = ppt == POPPOS_BOTRIGHT
+					    ? POPPOS_TOPRIGHT : POPPOS_TOPLEFT;
+	}
     }
 
     wp->w_wantcol = curwin->w_wincol + curwin->w_wcol + 1;
@@ -1651,6 +1676,7 @@
 	if (wp->w_wantcol < 1)
 	    wp->w_wantcol = 1;
     }
+
     popup_adjust_position(wp);
 }
 
@@ -1834,7 +1860,7 @@
     }
     if (type == TYPE_ATCURSOR)
     {
-	popup_set_wantpos_cursor(wp, 0);
+	popup_set_wantpos_cursor(wp, 0, d);
 	set_moved_values(wp);
 	set_moved_columns(wp, FIND_STRING);
     }
@@ -1935,7 +1961,7 @@
 	for (i = 0; i < 4; ++i)
 	    wp->w_popup_border[i] = 1;
 	parse_previewpopup(wp);
-	popup_set_wantpos_cursor(wp, wp->w_minwidth);
+	popup_set_wantpos_cursor(wp, wp->w_minwidth, d);
     }
 # ifdef FEAT_QUICKFIX
     if (type == TYPE_INFO)
diff --git a/src/proto/popupwin.pro b/src/proto/popupwin.pro
index 4ec4a74..bc4315a 100644
--- a/src/proto/popupwin.pro
+++ b/src/proto/popupwin.pro
@@ -12,7 +12,7 @@
 int popup_extra_width(win_T *wp);
 int parse_previewpopup(win_T *wp);
 int parse_completepopup(win_T *wp);
-void popup_set_wantpos_cursor(win_T *wp, int width);
+void popup_set_wantpos_cursor(win_T *wp, int width, dict_T *d);
 void popup_set_wantpos_rowcol(win_T *wp, int row, int col);
 void f_popup_clear(typval_T *argvars, typval_T *rettv);
 void f_popup_create(typval_T *argvars, typval_T *rettv);
diff --git a/src/structs.h b/src/structs.h
index 124b059..fd3a1d0 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -2113,7 +2113,8 @@
     POPPOS_TOPLEFT,
     POPPOS_BOTRIGHT,
     POPPOS_TOPRIGHT,
-    POPPOS_CENTER
+    POPPOS_CENTER,
+    POPPOS_NONE
 } poppos_T;
 
 typedef enum {
diff --git a/src/testdir/dumps/Test_popupwin_atcursor_pos.dump b/src/testdir/dumps/Test_popupwin_atcursor_pos.dump
new file mode 100644
index 0000000..a42b6e6
--- /dev/null
+++ b/src/testdir/dumps/Test_popupwin_atcursor_pos.dump
@@ -0,0 +1,12 @@
+|-+0&#ffffff0@59| @14
+|-@59| @14
+|-@25|%|-@16>@|-@14| @14
+|-@25|f+0#0000001#ffd7ff255|i|R|S|t| |-+0#0000000#ffffff0@6|F+0#0000001#ffd7ff255|i|r|s|t| |-+0#0000000#ffffff0@14| @14
+|-@25|s+0#0000001#ffd7ff255|e|C|O|n|d|-+0#0000000#ffffff0@6|S+0#0000001#ffd7ff255|e|c|o|n|D|-+0#0000000#ffffff0@14| @14
+|-@59| @14
+|-@1|f+0#0000001#ffd7ff255|i|r|s|t| |-+0#0000000#ffffff0@6|F+0#0000001#ffd7ff255|I|r|s|T| |-+0#0000000#ffffff0@38| @14
+|-@1|s+0#0000001#ffd7ff255|e|c|o|n|d|-+0#0000000#ffffff0@6|S+0#0000001#ffd7ff255|E|c|o|N|D|-+0#0000000#ffffff0@38| @14
+|-@1|#|-@16|&|-@38| @14
+|-@59| @14
+|-@59| @14
+@57|3|,|4|5| @9|T|o|p| 
diff --git a/src/testdir/test_popupwin.vim b/src/testdir/test_popupwin.vim
index eab569f..52d5add 100644
--- a/src/testdir/test_popupwin.vim
+++ b/src/testdir/test_popupwin.vim
@@ -1294,6 +1294,42 @@
   bwipe!
 endfunc
 
+func Test_popup_atcursor_pos()
+  CheckScreendump
+
+  let lines =<< trim END
+	call setline(1, repeat([repeat('-', 60)], 15))
+	set so=0
+
+	normal 9G3|r#
+	let winid1 = popup_atcursor(['first', 'second'], #{
+	      \ moved: [0, 0, 0],
+	      \ })
+	normal 9G21|r&
+	let winid1 = popup_atcursor(['FIrsT', 'SEcoND'], #{
+	      \ pos: 'botright',
+	      \ moved: [0, 0, 0],
+	      \ })
+	normal 3G27|r%
+	let winid1 = popup_atcursor(['fiRSt', 'seCOnd'], #{
+	      \ pos: 'topleft',
+	      \ moved: [0, 0, 0],
+	      \ })
+	normal 3G45|r@
+	let winid1 = popup_atcursor(['First', 'SeconD'], #{
+	      \ pos: 'topright',
+	      \ moved: [0, 0, 0],
+	      \ })
+  END
+  call writefile(lines, 'XtestPopupAtcursorPos')
+  let buf = RunVimInTerminal('-S XtestPopupAtcursorPos', #{rows: 12})
+  call VerifyScreenDump(buf, 'Test_popupwin_atcursor_pos', {})
+
+  " clean up
+  call StopVimInTerminal(buf)
+  call delete('XtestPopupAtcursorPos')
+endfunc
+
 func Test_popup_beval()
   CheckScreendump
   CheckFeature balloon_eval_term
diff --git a/src/version.c b/src/version.c
index 77b3a8a..6b6d661 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2273,
+/**/
     2272,
 /**/
     2271,