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Send xterm 216+ modifiers in small-keypad key escape sequences.

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In the 'xterm 216+' function key mode, a function key pressed with a
combination of Shift, Ctrl and Alt has its usual sequence like
ESC[n~ (for some integer n) turned into ESC[n;m~ where m-1 is a 3-bit
bitmap of currently pressed modifier keys.

This mode now also applies to the keys on the small keypad above the
arrow keys (Ins, Home, PgUp etc). If xterm 216+ mode is selected,
those keys are modified in the same way as the function keys.

As with the function keys, this doesn't guarantee that PuTTY will
_receive_ any particular shifted key of this kind, and not repurpose
it. Just as Alt+F4 still closes the window (at least on Windows)
rather than sending a modified F4 sequence, Shift+Ins will still
perform a paste action rather than sending a modified Ins sequence,
Shift-PgUp will still scroll the scrollback, etc. But the keys not
already used by PuTTY for other purposes should now have their
modern-xterm behaviour in modern-xterm mode.

Thanks to H.Merijn Brand for developing and testing a version of this
patch.
This commit is contained in:
Simon Tatham
2022-07-24 13:54:32 +01:00
parent 810e21de82
commit c88b6d1853
4 changed files with 29 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
unix/window.c
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@ -1914,7 +1914,13 @@ gint key_event(GtkWidget *widget, GdkEventKey *event, gpointer data)
if (event->state & GDK_CONTROL_MASK)
break;
end = 1 + format_small_keypad_key(output+1, inst->term, sk_key);
end = 1 + format_small_keypad_key(output+1, inst->term, sk_key,
event->state & GDK_SHIFT_MASK,
event->state & GDK_CONTROL_MASK,
event->state & inst->meta_mod_mask,
&consumed_meta_key);
if (consumed_meta_key)
start = 1; /* supersedes the usual prefixing of Esc */
#ifdef KEY_EVENT_DIAGNOSTICS
debug(" - small keypad key");
#endif