Fix 'window-text-pixel-size' when there's after-string at EOB

* src/xdisp.c (move_it_to): Fix logic of reaching TO_CHARPOS when
there's a display or overlay string(s) at EOB.  (Bug#47860)

1 files changed, 13 insertions, 1 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index 8ffec93e45d..7a89089958f 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -10064,8 +10064,20 @@ move_it_to (struct it *it, ptrdiff_t to_charpos, int to_x, int to_y, int to_vpos
           if ((op & MOVE_TO_POS) != 0
               && (IT_CHARPOS (*it) > to_charpos
                   || (IT_CHARPOS (*it) == to_charpos
+                      /* Consider TO_CHARPOS as REACHED if we are at
+                         EOB that ends in something other than a newline.  */
                       && to_charpos == ZV
-                      && (ZV_BYTE <= 1 || FETCH_BYTE (ZV_BYTE - 1) != '\n'))))
+                      && (ZV_BYTE <= 1 || FETCH_BYTE (ZV_BYTE - 1) != '\n')
+                      /* But if we have a display or an overlay string
+                         at EOB, keep going until we exhaust all the
+                         characters of the string(s).  */
+                      && (it->sp == 0
+                          || (STRINGP (it->string)
+                              && (it->current.overlay_string_index < 0
+                                  || (it->current.overlay_string_index >= 0
+                                      && it->current.overlay_string_index
+                                         >= it->n_overlay_strings - 1))
+                              && IT_STRING_CHARPOS (*it) >= it->end_charpos)))))
             {
               reached = 9;
               goto out;