Extended & human-friendly keys

See the changelog additions for user-visible changes.

Since we enable/disable terminal protocols whenever we pass terminal ownership,
tests can no longer run in parallel on the same terminal.

For the same reason, readline shortcuts in the gdb REPL will not work anymore.
As a remedy, use gdbserver, or lobby for CSI u support in libreadline.

Add sleep to some tests, otherwise they fall (both in CI and locally).

There are two weird failures on FreeBSD remaining, disable them for now
https://github.com/fish-shell/fish-shell/pull/10359/checks?check_run_id=23330096362

Design and implementation borrows heavily from Kakoune.

In future, we should try to implement more of the kitty progressive
enhancements.

Closes #10359

share/functions/fish_default_key_bindings.fish

@@ -1,4 +1,5 @@
 function fish_default_key_bindings -d "emacs-like key binds"
+    set -l legacy_bind bind
     if contains -- -h $argv
         or contains -- --help $argv
         echo "Sorry but this function doesn't support -h or --help"
@@ -30,65 +31,65 @@ function fish_default_key_bindings -d "emacs-like key binds"
     __fish_shared_key_bindings $argv
     or return # protect against invalid $argv
 
-    bind --preset $argv \ck kill-line
+    bind --preset $argv ctrl-k kill-line
 
-    bind --preset $argv \eOC forward-char
-    bind --preset $argv \eOD backward-char
-    bind --preset $argv \e\[C forward-char
-    bind --preset $argv \e\[D backward-char
-    bind --preset $argv -k right forward-char
-    bind --preset $argv -k left backward-char
+    bind --preset $argv right forward-char
+    bind --preset $argv left backward-char
+    $legacy_bind --preset $argv \eOC forward-char
+    $legacy_bind --preset $argv \eOD backward-char
+    $legacy_bind --preset $argv \e\[C forward-char
+    $legacy_bind --preset $argv \e\[D backward-char
+    $legacy_bind --preset $argv -k right forward-char
+    $legacy_bind --preset $argv -k left backward-char
 
-    bind --preset $argv -k dc delete-char
-    bind --preset $argv -k backspace backward-delete-char
-    bind --preset $argv \x7f backward-delete-char
+    bind --preset $argv delete delete-char
+    bind --preset $argv backspace backward-delete-char
+    bind --preset $argv shift-backspace backward-delete-char
 
     # for PuTTY
     # https://github.com/fish-shell/fish-shell/issues/180
-    bind --preset $argv \e\[1~ beginning-of-line
-    bind --preset $argv \e\[3~ delete-char
-    bind --preset $argv \e\[4~ end-of-line
+    $legacy_bind --preset $argv \e\[1~ beginning-of-line
+    $legacy_bind --preset $argv \e\[3~ delete-char
+    $legacy_bind --preset $argv \e\[4~ end-of-line
 
-    bind --preset $argv -k home beginning-of-line
-    bind --preset $argv -k end end-of-line
+    bind --preset $argv home beginning-of-line
+    $legacy_bind --preset $argv -k home beginning-of-line
+    bind --preset $argv end end-of-line
+    $legacy_bind --preset $argv -k end end-of-line
 
-    bind --preset $argv \ca beginning-of-line
-    bind --preset $argv \ce end-of-line
-    bind --preset $argv \ch backward-delete-char
-    bind --preset $argv \cp up-or-search
-    bind --preset $argv \cn down-or-search
-    bind --preset $argv \cf forward-char
-    bind --preset $argv \cb backward-char
-    bind --preset $argv \ct transpose-chars
-    bind --preset $argv \cg cancel
-    bind --preset $argv \c_ undo
-    bind --preset $argv \cz undo
-    bind --preset $argv \e/ redo
-    bind --preset $argv \et transpose-words
-    bind --preset $argv \eu upcase-word
+    bind --preset $argv ctrl-a beginning-of-line
+    bind --preset $argv ctrl-e end-of-line
+    bind --preset $argv ctrl-h backward-delete-char
+    bind --preset $argv ctrl-p up-or-search
+    bind --preset $argv ctrl-n down-or-search
+    bind --preset $argv ctrl-f forward-char
+    bind --preset $argv ctrl-b backward-char
+    bind --preset $argv ctrl-t transpose-chars
+    bind --preset $argv ctrl-g cancel
+    bind --preset $argv ctrl-/ undo
+    bind --preset $argv ctrl-_ undo # XTerm idiosyncracy, can get rid of this once we go full CSI u
+    bind --preset $argv ctrl-z undo
+    bind --preset $argv alt-/ redo
+    bind --preset $argv alt-t transpose-words
+    bind --preset $argv alt-u upcase-word
 
-    # This clashes with __fish_list_current_token
-    # bind --preset $argv \el downcase-word
-    bind --preset $argv \ec capitalize-word
-    # One of these is alt+backspace.
-    bind --preset $argv \e\x7f backward-kill-word
-    bind --preset $argv \e\b backward-kill-word
-    if not test "$TERM_PROGRAM" = Apple_Terminal
-        bind --preset $argv \eb backward-word
-        bind --preset $argv \ef forward-word
-    else
+    bind --preset $argv alt-c capitalize-word
+    bind --preset $argv alt-backspace backward-kill-word
+    bind --preset $argv alt-b backward-word
+    bind --preset $argv alt-f forward-word
+    if test "$TERM_PROGRAM" = Apple_Terminal
         # Terminal.app sends \eb for alt+left, \ef for alt+right.
         # Yeah.
-        bind --preset $argv \eb prevd-or-backward-word
-        bind --preset $argv \ef nextd-or-forward-word
+        $legacy_bind --preset $argv alt-b prevd-or-backward-word
+        $legacy_bind --preset $argv alt-f nextd-or-forward-word
     end
 
-    bind --preset $argv \e\< beginning-of-buffer
-    bind --preset $argv \e\> end-of-buffer
+    bind --preset $argv alt-\< beginning-of-buffer
+    bind --preset $argv alt-\> end-of-buffer
 
-    bind --preset $argv \ed kill-word
+    bind --preset $argv alt-d kill-word
 
-    bind --preset $argv \cr history-pager
+    bind --preset $argv ctrl-r history-pager
 
     # term-specific special bindings
     switch "$TERM"
@@ -96,16 +97,16 @@ function fish_default_key_bindings -d "emacs-like key binds"
             # suckless and bash/zsh/fish have a different approach to how the terminal should be configured;
             # the major effect is that several keys do not work as intended.
             # This is a workaround, there will be additions in he future.
-            bind --preset $argv \e\[P delete-char
-            bind --preset $argv \e\[Z up-line
+            $legacy_bind --preset $argv \e\[P delete-char
+            $legacy_bind --preset $argv \e\[Z up-line
         case 'rxvt*'
-            bind --preset $argv \e\[8~ end-of-line
-            bind --preset $argv \eOc forward-word
-            bind --preset $argv \eOd backward-word
+            $legacy_bind --preset $argv \e\[8~ end-of-line
+            $legacy_bind --preset $argv \eOc forward-word
+            $legacy_bind --preset $argv \eOd backward-word
         case xterm-256color
             # Microsoft's conemu uses xterm-256color plus
             # the following to tell a console to paste:
-            bind --preset $argv \e\x20ep fish_clipboard_paste
+            $legacy_bind --preset $argv \e\x20ep fish_clipboard_paste
     end
 
     set -e -g fish_cursor_selection_mode