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With this patch, st will reset its window title when an empty string is
given as the terminal title. For example:
printf "\033]0;\007"
Some applications, like termdown, expect this functionality. xterm
implements it, but it seems that most other terminal emulators don't.
In any case, I don't see why there should ever be a case where the st
window doesn't have a title property.
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This reverts commit 7473a8d1a57e5f9aba41b953f4e498c35e1c9dc5.
This patch needs some more work. It caused regressions with programs that use
GNU readline, etc.
Original test-case example from Tim Culverhouse <tim@timculverhouse.com>:
printf " 😀" && sleep 2 && printf "\e[D" && sleep 2 && printf "\e[D" && sleep 2
After the patch it caused regressions, example test-case:
printf "Aå—\bB\n"
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Previously, printf 'L\033[2147483647b' would call tputc('L') 2^31 times,
making st unresponsive. This commit allows repeating the last character
at most 65535 times in order to prevent freezing and DoS attacks.
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st would always move back 1 column,
even with wide glyhps (using more than a single column).
The glyph rune is set on its first column,
and the other ones are to 0,
so loop until we detect the start of the previous glyph.
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The handler for 'S' final character does not check for a private
marker. This can cause a conflict with a sequence called 'XTSMGRAPHICS'
which also has an 'S' final character, but uses the private marker '?'.
Without checking for a private marker, st will perform a scroll up
operation when XTSMGRAPHICS is seen, which can cause unexpected display
artifacts.
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Helps Vim (and hopefully others) to discover that this feature exists
without further user configuration.
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It is unclear if it's "required" to do this on RIS, but it's useful when
calling reset(1) after interactive programs have crashed and garbled up
the screen.
FWIW, other terminals do it as well (tested with XTerm, VTE, Kitty,
Alacritty, Linux VT).
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Consider the following example:
printf '\e[?7l';\
for i in $(seq $(($(tput cols) - 1))); do printf a; done;\
printf '🙈\n';\
printf '\e[?7h'
Even though MODE_WRAP has been disabled, the emoji appeared on the next
line. This patch keeps wide glyphs on the same line and moves them to
the right-most possible position.
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Fixes garbage selections when switching to/from the alternate screen.
How to reproduce:
- Be in primary screen.
- Select something.
- Run this (switches to alternate screen, positions the cursor at the
bottom, triggers selscroll(), and then goes back to primary screen):
tput smcup; tput cup $(tput lines) 0; echo foo; tput rmcup
- Notice how the (visual) selection now covers a different line.
The reason is that selscroll() calls selnormalize() and that cannot find
the original range anymore. It's all empty lines now, so it snaps to
"select the whole line".
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dc.collen is the length of dc.col, not the maximum index, hence if x is
equal to dc.collen, then it's an error.
With config.def.h, the last valid index is 259, so this correctly
reports "black":
$ printf '\033]4;259;?\e\\'
260 is an invalid index and this reports garbage instead of printing an
error:
$ printf '\033]4;260;?\e\\'
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The Makefile used to suppress output (by using @), so this target made sense at
the time.
But the Makefile should be simple and make debugging with less abstractions or
fancy printing. The Makefile was made verbose and doesn't hide the build
output, so remove this target.
Prompted by a question on the mailing list about the options target.
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Under insert mode, when inserting a normal character in front of
a wide character, the affected region is shifted to the right by
one cell. However, the empty cell is reset as if being a part of a
wide character, causing the following cell being mishandled as a
dummy cell.
To reproduce the bug:
printf '\033[4h' # set MODE_INSERT
printf 妳好
printf '\033[4D'
printf 'x'
printf '\033[4l\n'
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