patch 8.1.0554: popup menu overlaps with preview window

Problem:    Popup menu overlaps with preview window.
Solution:   Adjust the height computation. (Hirohito Higashi, closes #3414)

src/popupmnu.c

@@ -196,20 +196,11 @@ pum_display(
 	    return;
 
 #if defined(FEAT_QUICKFIX)
-	// If there is a preview window at the above avoid drawing over it.
+	// If there is a preview window above avoid drawing over it.
-	// Do keep at least 10 entries.
+	if (pvwin != NULL && pum_row < above_row && pum_height > above_row)
-	if (pvwin != NULL && pum_row < above_row && pum_height > 10)
 	{
-	    if (pum_win_row - above_row < 10)
+	    pum_row = above_row;
-	    {
+	    pum_height = pum_win_row - above_row;
-		pum_row = pum_win_row - 10;
-		pum_height = 10;
-	    }
-	    else
-	    {
-		pum_row = above_row;
-		pum_height = pum_win_row - above_row;
-	    }
 	}
 #endif
 

src/testdir/dumps/Test_popup_and_previewwindow_01.dump

@@ -0,0 +1,20 @@
+|a+0&#ffffff0|b|0| @71
+|a|b|1| @71
+|a|b|2| @71
+|a|b|3| @71
+|a|b|4| @71
+|a|b|5| @71
+|a|b|6| @71
+|a|b|7| @71
+|a|b|8| @71
+|a+0#0000001#e0e0e08|b|0| @11| +0#0000000#0000001|e+1&#ffffff0|w|]|[|+|]| @34|1|,|1| @11|T|o|p
+|a+0#0000001#ffd7ff255|b|1| @11| +0#0000000#0000001| +0&#ffffff0@58
+|a+0#0000001#ffd7ff255|b|2| @11| +0#0000000#0000001| +0&#ffffff0@58
+|a+0#0000001#ffd7ff255|b|3| @11| +0#0000000#0000001| +0&#ffffff0@58
+|a+0#0000001#ffd7ff255|b|4| @11| +0#0000000#a8a8a8255| +0&#ffffff0@58
+|a+0#0000001#ffd7ff255|b|5| @11| +0#0000000#a8a8a8255| +0&#ffffff0@58
+|a+0#0000001#ffd7ff255|b|6| @11| +0#0000000#a8a8a8255| +0&#ffffff0@58
+|a|b|0> @71
+|~+0#4040ff13&| @73
+|[+3#0000000&|N|o| |N|a|m|e|]| |[|+|]| @43|1|0|,|1| @10|B|o|t
+|-+2&&@1| |K|e|y|w|o|r|d| |L|o|c|a|l| |c|o|m|p|l|e|t|i|o|n| |(|^|N|^|P|)| |m+0#00e0003&|a|t|c|h| |1| |o|f| |1|0| +0#0000000&@26

src/testdir/test_popup.vim

@@ -701,6 +701,28 @@ func Test_popup_and_preview_autocommand()
   bw!
 endfunc
 
+func Test_popup_and_previewwindow_dump()
+  if !CanRunVimInTerminal()
+    return
+  endif
+  call writefile([
+    \ 'set previewheight=9',
+    \ 'silent! pedit',
+    \ 'call setline(1, map(repeat(["ab"], 10), "v:val. v:key"))',
+    \ 'exec "norm! G\<C-E>\<C-E>"',
+	\ ], 'Xscript')
+  let buf = RunVimInTerminal('-S Xscript', {})
+
+  " Test that popup and previewwindow do not overlap.
+  call term_sendkeys(buf, "o\<C-X>\<C-N>")
+  sleep 100m
+  call VerifyScreenDump(buf, 'Test_popup_and_previewwindow_01', {})
+
+  call term_sendkeys(buf, "\<Esc>u")
+  call StopVimInTerminal(buf)
+  call delete('Xscript')
+endfunc
+
 func Test_balloon_split()
   if !exists('*balloon_split')
     return

src/version.c

@@ -792,6 +792,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    554,
 /**/
     553,
 /**/