Allow glyphless-char-display to distinguish between X and text terminals.

Use this for Tabulated List mode.

* lisp/emacs-lisp/tabulated-list.el (tabulated-list-mode): Use a custom
glyphless-char-display table.
(tabulated-list-glyphless-char-display): New var.

* src/term.c (produce_glyphless_glyph): Handle cons cell entry in
glyphless-char-display.

* src/xdisp.c (lookup_glyphless_char_display)
(produce_glyphless_glyph): Handle cons cell entry in
glyphless-char-display.
(Vglyphless_char_display): Document it.

1 files changed, 3 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 869e95216e5..69540fa1f54 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -779,6 +779,9 @@ sc.el, x-menu.el, rnews.el, rnewspost.el
 
 * Lisp changes in Emacs 24.1
 
+** `glyphless-char-table' can now distinguish between graphical and
+text terminal display, via a char-table entry that is a cons cell.
+
 ** `open-network-stream' can now be used to open an encrypted stream.
 It now accepts an optional `:type' parameter for initiating a TLS
 connection, directly or via STARTTLS.  To do STARTTLS, additional