GNU bug report logs - #37782
Emacs 27 client adding [I] to the beginning of the buffer

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From: Carlos Pita <carlosjosepita <at> gmail.com>
Cc: 37782 <at> debbugs.gnu.org
Subject: bug#37782: Emacs 27 client adding [I] to the beginning of the buffer
Date: Sat, 19 Oct 2019 00:20:05 -0300

[Message part 1 (text/plain, inline)]

After hours and hours (and hours) of life sucking debugging I found
out the offending code (in read_key_sequence):

    if ((FIXNUMP (key) && XFIXNUM (key) == -2) /* wrong_kboard_jmpbuf */
/* When switching to a new tty (with a new keyboard),
   read_char returns the new buffer, rather than -2
   (Bug#5095).  This is because `terminal-init-xterm'
   calls read-char, which eats the wrong_kboard_jmpbuf
   return.  Any better way to fix this? -- cyd  */
|| (interrupted_kboard != current_kboard))
  {
   ....
   mock_input = 0;
   goto replay_entire_sequence;
  }

The problem with the fix for #5095 is that it's dropping the current
event, which is a valid char event and not -2. Thus, the first esc
char sent by the terminal after turning on focus tracking is lost and
we get `[`, `I` events separately inserted into the buffer afterwards.

Attached is a patch that replays key as mock input when it's not -2.

Can I ask for some of my hidpi fringe or colorized comint/python
history patches to be merged in exchange ;) ?

Best regards
--
Carlos

[0001-Replay-key-if-kboard-is-interrupted-while-initializi.patch (text/x-patch, attachment)]

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