Fix cursor display in mini-window under icomplete-mode

* src/xdisp.c (resize_mini_window): When we show only part of the
mini-window's contents, make sure the window-start position is at
the beginning of a screen line.  (Bug#43519)

diff --git a/src/xdisp.c b/src/xdisp.c
index ac5307f4acc3177e1868c576b54dc79dd117cbc0..8fadff972f0a3b55d4a7837fc945c43d3f39a747 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -11809,6 +11809,16 @@ resize_mini_window (struct window *w, bool exact_p)
          height = (max_height / unit) * unit;
          init_iterator (&it, w, ZV, ZV_BYTE, NULL, DEFAULT_FACE_ID);
          move_it_vertically_backward (&it, height - unit);
+         /* The following move is usually a no-op when the stuff
+            displayed in the mini-window comes entirely from buffer
+            text, but it is needed when some of it comes from overlay
+            strings, especially when there's an after-string at ZV.
+            This happens with some completion packages, like
+            icomplete, ido-vertical, etc.  With those packages, if we
+            don't force w->start to be at the beginning of a screen
+            line, important parts of the stuff in the mini-window,
+            such as user prompt, will be hidden from view.  */
+         move_it_by_lines (&it, 0);
          start = it.current.pos;
        }
       else