I've noticed that there's a slight difference in how the DECSC/DECRC codes
work in tmux vs. xterm. tmux is compatible with how screen works, so it
very well may be intentional, but I want to be sure, since xterm is
sometimes considered the canonical implementation of a terminal.
In tmux, the DECSC (save cursor: ESC 7) command saves the cursor position
separately from where the cursor position is saved when you switch into the
alternate screen with ESC [?1049h
In xterm, DECSC saves the cursor position in the same place as it's saved
when switching to the alternate screen, so ESC[?1049h overwrites it.
This escape sequence leaves the cursor at (1,1) in tmux and at (20,20) in
xterm:
^[[1;1H^[7^[[20;20H^[[?1049h^[[?1049l^[8
I couldn't find any real docs on how the "screen" term is supposed to work.
VT100.net is vague, saying only that DECSC saves the cursor's position in
memory.
Thanks,
George
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