Fix test failures due to 'xterm-select-active-regions'

* lisp/frame.el (tty-select-active-regions): Rename from
xterm-select-active-regions and move here from xterm.c.
(display-selections-p): Adjust to the above.  (Bug#55883)

3 files changed, 11 insertions, 13 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 438cec9257f..f9eb81908b8 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -509,8 +509,8 @@ the 'COLORTERM' environment variable is set to the value "truecolor".
 *** Select active regions with xterm selection support.
 On terminals with xterm setSelection support, the active region may be
 saved to the X primary selection, following the
-'select-active-regions' variable.  This support is enabled with
-'xterm-select-active-regions'.
+'select-active-regions' variable.  This support is enabled when
+'tty-select-active-regions' is non-nil.
 
 ** ERT
 
diff --git a/lisp/frame.el b/lisp/frame.el
index 35863c01350..a6aa4475dd9 100644
--- a/lisp/frame.el
+++ b/lisp/frame.el
@@ -2149,8 +2149,14 @@ frame's display)."
 (defalias 'display-multi-frame-p #'display-graphic-p)
 (defalias 'display-multi-font-p #'display-graphic-p)
 
-;; From term/xterm.el
-(defvar xterm-select-active-regions)
+(defcustom tty-select-active-regions nil
+  "If non-nil, update PRIMARY window-system selection on text-mode frames.
+On a text-mode terminal that supports setSelection command, if
+this variable is non-nil, Emacs will set the PRIMARY selection
+from the active region, according to `select-active-regions'.
+This is currently supported only on xterm."
+  :version "29.1"
+  :type 'boolean)
 
 (defun display-selections-p (&optional display)
   "Return non-nil if DISPLAY supports selections.
@@ -2167,7 +2173,7 @@ frame's display)."
        (not (null dos-windows-version))))
      ((memq frame-type '(x w32 ns pgtk))
       t)
-     ((and xterm-select-active-regions
+     ((and tty-select-active-regions
            (terminal-parameter nil 'xterm--set-selection))
       t)
      (t
diff --git a/lisp/term/xterm.el b/lisp/term/xterm.el
index 0791780d406..a7e257f41c5 100644
--- a/lisp/term/xterm.el
+++ b/lisp/term/xterm.el
@@ -80,14 +80,6 @@ capabilities, and only when that terminal understands bracketed paste."
   :version "28.1"
   :type 'boolean)
 
-(defcustom xterm-select-active-regions nil
-  "If non-nil, update PRIMARY X selection on text-mode frames.
-On a text-mode terminal that supports setSelection command, if
-this variable is non-nil, Emacs will set the PRIMARY selection
-from the active region, according to `select-active-regions'."
-  :version "29.1"
-  :type 'boolean)
-
 (defconst xterm-paste-ending-sequence "\e[201~"
   "Characters sent by the terminal to end a bracketed paste.")