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cfd1b81dc7
Support Kitty and SIXEL input and output with grid-resident image layers, history and copy-mode integration, text fallback rendering, and damage-rectangle redraws. Consolidate the image work through 250f96b4b onto the redraw-damage-rectangles-new base, excluding the superseded redraw implementation and its historical merges. The original history is preserved in backup/4902-image-support-before-master-rebase-20261003.
108 lines
4.2 KiB
Bash
Executable File
108 lines
4.2 KiB
Bash
Executable File
#!/bin/sh
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# Regression test for a tmux bug (not a terminal bug): image_redraw_scroll()
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# (image.c) marks the whole scroll region as damage on every scroll. For a
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# client whose terminal has imagescroll, the terminal has already moved the
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# image (and the text) along with the scroll, but the damage was still
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# composed: the image was not retransmitted, but the ordinary text pass
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# drew blank grid content directly over the image's cells and erased a
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# correctly scrolled image. This is what a user saw as "the image
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# disappears when the pane scrolls in Windows Terminal" even with
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# imagescroll and margins both granted, and could never be reproduced by
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# any terminal-side test because the bug is entirely server side.
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#
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# redraw_client_damage_rect() (screen-redraw.c) now composes nothing for a
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# scroll the client's terminal is trusted to have done itself, logging
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# "composing damage" only when it draws. Nothing being drawn is what keeps
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# the image, so the absence of that log line for the scroll is checked.
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#
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# The image is placed comfortably mid-pane (not at the very top) and wide
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# enough to span the whole pane, so it is still on screen - not already
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# scrolled into history - by the time a real scroll's damage gets composed.
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PATH=/bin:/usr/bin
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TERM=screen
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LC_ALL=C.UTF-8
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export TERM LC_ALL
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[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
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TMUX="$TEST_TMUX -LtestA$$ -vv -f/dev/null"
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TMUX2="$TEST_TMUX -LtestB$$ -f/dev/null"
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cleanup()
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{
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$TMUX kill-server >/dev/null 2>&1
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$TMUX2 kill-server >/dev/null 2>&1
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}
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fail()
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{
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echo "$*" >&2
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cleanup
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exit 1
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}
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cleanup
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DIR=$(mktemp -d) || exit 1
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cd "$DIR" || exit 1
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trap "cleanup; cd /; rm -rf $DIR" 0 1 15
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WIDTH=40
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HEIGHT=20
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ROW=10
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# A sixel image exactly WIDTH cells wide (at a typical ~9px cell, 360px) and
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# one cell tall, placed at screen row ROW - comfortably mid-pane, not at
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# the very top, so it stays visible (not yet scrolled into history) through
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# the first several scrolls.
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HEADER='\033Pq"1;1;360;18#0;2;100;100;100#0!360~-!360~-!360B\033\\'
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# Pad with blank lines after the image so the shell prompt lands at the
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# bottom of the pane - without this, the very first scroll from a
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# not-yet-settled cursor position falls back to tty_redraw_region() (a
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# different, unrelated path that the trusted-scroll skip never applies to
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# anyway), and the test would not exercise what it is meant to.
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PAD=$((HEIGHT - ROW - 2))
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$TMUX new-session -d -s inner -x $WIDTH -y $HEIGHT \
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"printf '\\033[$((ROW + 1));1H$HEADER'; i=0; while [ \$i -lt $PAD ]; do echo; i=\$((i + 1)); done; exec sh" ||
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exit 1
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sleep 0.3
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[ "$($TMUX display-message -p '#{image_support}')" = 0 ] && exit 0
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$TMUX set -g pane-scrollbars on || exit 1
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$TMUX set -as terminal-features ',*:sixel' || exit 1
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$TMUX set -as terminal-features ',*:margins' || exit 1
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$TMUX set -as terminal-features ',*:imagescroll' || exit 1
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$TMUX2 new-session -d -x $WIDTH -y $HEIGHT || exit 1
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OUTER=$($TMUX2 list-panes -F '#{pane_id}' | head -1)
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[ -n "$OUTER" ] || fail "No outer pane."
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$TMUX2 set -as terminal-features ',*:sixel@' || fail "disable outer sixel failed"
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TMP=$(mktemp)
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$TMUX2 pipe-pane -t "$OUTER" -O "cat >$TMP" || fail "pipe-pane failed"
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$TMUX2 send-keys -t "$OUTER" -l "$TMUX attach -t inner" || fail "send attach failed"
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$TMUX2 send-keys -t "$OUTER" Enter || fail "send enter failed"
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sleep 1
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grep -qa '"1;1;360;18' "$TMP" || fail "sanity: image never reached the client"
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LOG=$(ls tmux-server*.log 2>/dev/null | head -1)
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[ -n "$LOG" ] || fail "sanity: no server -vv log was produced"
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BEFORE=$(wc -l <"$LOG")
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: >"$TMP"
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# The image (row ROW, 10 of 20) has plenty of room above it - this stays
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# well within the visible pane for the whole burst.
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$TMUX send-keys -t inner -l "yes | head -n 10" || fail "send scroll failed"
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$TMUX send-keys -t inner Enter || fail "send enter failed"
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sleep 1
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n_dcs=$(grep -ac "$(printf '\033P')" "$TMP")
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[ "$n_dcs" -eq 0 ] ||
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fail "sanity: image was retransmitted ($n_dcs times) - imagescroll's trust did not engage, so this run cannot test what it is meant to"
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tail -n +$((BEFORE + 1)) "$LOG" | grep -q "redraw_client_damage_rect: .* composing damage" &&
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fail "damage was composed for a scroll the terminal is trusted to have done - this would draw over the image and erase it"
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exit 0
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