Merge from origin/emacs-28

d742cc3c20 (origin/emacs-28) ; etc/NEWS: Fix typos
28db29590f * admin/notes/unicode: Refer to Unicode's emoji-style.txt
9bd2f59db6 Handle VS-16 correctly for non-emoji codepoints
e55e2d4a11 ; * etc/NEWS: Minor copyedit about 'repeat-mode'.
380981ddb5 Adjust bug-reference-bug-regexp default values to match on...
c1cf95a0e1 ; * doc/emacs/windows.texi: Doc fix.
98eb6d783a Fix a typo in emacs-lisp-intro.texi
f5b8f626e3 Fix some Tramp problems
fc988a7113 Adapt Tramp manual
0c241043a8 Further fixes to Elisp manual
8e8a920246 * lisp/progmodes/cc-engine.el (c-forward-decl-or-cast-1): ...
5a3242301d Rename tab-bar-drag-maybe to tab-bar--dragging-in-progress
bb4209a5a5 Fix xref elisp identifier namespace mistake

# Conflicts:
#	etc/NEWS

3 files changed, 32 insertions, 5 deletions

diff --git a/src/composite.c b/src/composite.c
index f456e7a835d..c170805d9dd 100644
--- a/src/composite.c
+++ b/src/composite.c
@@ -2124,6 +2124,17 @@ GSTRING, or modify GSTRING itself and return it.
 See also the documentation of `auto-composition-mode'.  */);
   Vcomposition_function_table = Fmake_char_table (Qnil, Qnil);
 
+  DEFVAR_LISP ("auto-composition-emoji-eligible-codepoints", Vauto_composition_emoji_eligible_codepoints,
+               doc: /* List of codepoints for which auto-composition will check for an emoji font.
+
+These are codepoints which have Emoji_Presentation = No, and thus by
+default are not displayed as emoji.  In certain circumstances, such as
+when followed by U+FE0F (VS-16) the emoji font should be used for
+them anyway.
+
+This list is auto-generated, you should not need to modify it.  */);
+  Vauto_composition_emoji_eligible_codepoints = Qnil;
+
   defsubr (&Scompose_region_internal);
   defsubr (&Scompose_string_internal);
   defsubr (&Sfind_composition_internal);
diff --git a/src/font.c b/src/font.c
index 83f0f8296ad..6cd4a6b5c11 100644
--- a/src/font.c
+++ b/src/font.c
@@ -3860,6 +3860,23 @@ font_at (int c, ptrdiff_t pos, struct face *face, struct window *w,
 
 #ifdef HAVE_WINDOW_SYSTEM
 
+/* Check if CH is a codepoint for which we should attempt to use the
+   emoji font, even if the codepoint itself has Emoji_Presentation =
+   No.  Vauto_composition_emoji_eligible_codepoints is filled in for
+   us by admin/unidata/emoji-zwj.awk.  */
+static bool
+codepoint_is_emoji_eligible (int ch)
+{
+  if (EQ (CHAR_TABLE_REF (Vchar_script_table, ch), Qemoji))
+    return true;
+
+  if (! NILP (Fmemq (make_fixnum (ch),
+                     Vauto_composition_emoji_eligible_codepoints)))
+    return true;
+
+  return false;
+}
+
 /* Check how many characters after character/byte position POS/POS_BYTE
    (at most to *LIMIT) can be displayed by the same font in the window W.
    FACE, if non-NULL, is the face selected for the character at POS.
@@ -3907,8 +3924,7 @@ font_range (ptrdiff_t pos, ptrdiff_t pos_byte, ptrdiff_t *limit,
   /* If the composition was triggered by an emoji, use a character
      from 'script-representative-chars', rather than the first
      character in the string, to determine the font to use.  */
-  if (EQ (CHAR_TABLE_REF (Vchar_script_table, ch),
-          Qemoji))
+  if (codepoint_is_emoji_eligible (ch))
     {
       Lisp_Object val = assq_no_quit (Qemoji, Vscript_representative_chars);
       if (CONSP (val))
diff --git a/src/xdisp.c b/src/xdisp.c
index 578458bd248..738f22abedd 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -33780,7 +33780,7 @@ note_mouse_highlight (struct frame *f, int x, int y)
   if (EQ (window, f->tab_bar_window))
     {
       note_tab_bar_highlight (f, x, y);
-      if (tab_bar_drag_maybe)
+      if (tab_bar__dragging_in_progress)
         {
           cursor = FRAME_OUTPUT_DATA (f)->hand_cursor;
           goto set_cursor;
@@ -35916,9 +35916,9 @@ When nil, mouse-movement events will not be generated as long as the
 mouse stays within the extent of a single glyph (except for images).  */);
   mouse_fine_grained_tracking = false;
 
-  DEFVAR_BOOL ("tab-bar-drag-maybe", tab_bar_drag_maybe,
+  DEFVAR_BOOL ("tab-bar--dragging-in-progress", tab_bar__dragging_in_progress,
     doc: /* Non-nil when maybe dragging tab bar item.  */);
-  tab_bar_drag_maybe = false;
+  tab_bar__dragging_in_progress = false;
 
   DEFVAR_BOOL ("redisplay-skip-initial-frame", redisplay_skip_initial_frame,
     doc: /* Non-nil to skip redisplay in initial frame.