[Emacs-diffs] master 9c6cacd: Fix hscrolling calculations when display-line-numbers is set

[Eli Zaretskii]

branch: master
commit 9c6cacd338c90180bc377cae923c716c1dc3d14c
Author: Eli Zaretskii <address@hidden>
Commit: Eli Zaretskii <address@hidden>

    Fix hscrolling calculations when display-line-numbers is set
    
    * src/xdisp.c (move_it_in_display_line_to): Account for line
    numbers in hscrolled lines.  (Bug#27756)
---
 src/xdisp.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/src/xdisp.c b/src/xdisp.c
index c415bf2..3e5657f 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -8631,6 +8631,7 @@ move_it_in_display_line_to (struct it *it,
   ptrdiff_t closest_pos UNINIT;
   ptrdiff_t prev_pos = IT_CHARPOS (*it);
   bool saw_smaller_pos = prev_pos < to_charpos;
+  bool line_number_pending = false;
 
   /* Don't produce glyphs in produce_glyphs.  */
   saved_glyph_row = it->glyph_row;
@@ -8682,9 +8683,13 @@ move_it_in_display_line_to (struct it *it,
   if (it->hpos == 0)
     {
       /* If line numbers are being displayed, produce a line number.  */
-      if (should_produce_line_number (it)
-         && it->current_x == it->first_visible_x)
-       maybe_produce_line_number (it);
+      if (should_produce_line_number (it))
+       {
+         if (it->current_x == it->first_visible_x)
+           maybe_produce_line_number (it);
+         else
+           line_number_pending = true;
+       }
       /* If there's a line-/wrap-prefix, handle it.  */
       if (it->method == GET_FROM_BUFFER)
        handle_line_prefix (it);
@@ -9055,6 +9060,15 @@ move_it_in_display_line_to (struct it *it,
 
              if (new_x > it->first_visible_x)
                {
+                 /* If we have reached the visible portion of the
+                    screen line, produce the line number if needed.  */
+                 if (line_number_pending)
+                   {
+                     line_number_pending = false;
+                     it->current_x = it->first_visible_x;
+                     maybe_produce_line_number (it);
+                     it->current_x += new_x - it->first_visible_x;
+                   }
                  /* Glyph is visible.  Increment number of glyphs that
                     would be displayed.  */
                  ++it->hpos;