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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 Consolidate the image work through 250f96b4b onto the redraw-damage-rectangles-new base, excluding the superseded redraw implementation and its historical merges.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.
101 lines
3.6 KiB
Bash
Executable File
101 lines
3.6 KiB
Bash
Executable File
#!/bin/sh
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# Regression test: extending a copy-mode selection by cursor movement, with
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# the view otherwise unmoved (no scrolling), must not retransmit an image
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# whose row the cursor passes through.
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#
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# window_copy_write_one() (window-copy.c) used to write text/highlight
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# styling directly over image-covered cells, which - since a character
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# write typically clears whatever pixel content a terminal was showing
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# there - erased the image with nothing to redraw it back in. Separately,
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# window_copy_write_line()'s call to image_redraw_area() used to fire
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# unconditionally on every redraw, so even after fixing the erasure, the
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# image would still be needlessly recomposited (and briefly flash) on
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# every single cursor step even though nothing about it had changed. See
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# tmux-image-redraw-known-bugs.md for the full write-up.
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#
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# This is checked by counting DCS (\033P) sequences in the client's raw
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# output during the cursor movement: with the fix, extending a selection
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# without scrolling never touches the image, so none should appear.
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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$$ -f/dev/null"
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TMUX2="$TEST_TMUX -LtestB$$ -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 "$*" >&2
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cleanup
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exit 1
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}
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cleanup
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TMP=$(mktemp)
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trap "cleanup; rm -f $TMP" 0 1 15
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# A small, distinctive SIXEL raster (26x26 pixels) at the top of the pane,
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# matching the fixture already used in image-support.sh, followed by
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# enough plain lines that the cursor can move down through the image and
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# past it without the view needing to scroll.
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SIXEL='\033Pq"1;1;26;26#0;2;100;100;100#0!26~-!26~-!26~-!26~-!26B\033\\'
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$TMUX new-session -d -s inner -x 40 -y 20 \
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"printf '$SIXEL'; for i in \$(seq 1 15); do echo line\$i; done; exec sh" ||
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exit 1
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sleep 0.5
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[ "$($TMUX display-message -p '#{image_support}')" = 0 ] && exit 0
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$TMUX set -as terminal-features ',*:sixel' || exit 1
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# Start the outer session with a plain shell, then start capturing before
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# triggering the attach - starting the attach as the outer pane's initial
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# command would mean pipe-pane only starts after the attach-driven initial
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# redraw (which sends the image) has already happened, missing it.
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$TMUX2 new-session -d -x 40 -y 20 || exit 1
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OUTER=$($TMUX2 list-panes -F '#{pane_id}' | head -1)
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[ -n "$OUTER" ] || fail "No outer pane."
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$TMUX2 pipe-pane -t "$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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# Sanity check: the image reached the client at all.
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grep -qa '"1;1;26;26' $TMP || fail "sanity: image never reached the client"
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: >$TMP
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# Enter copy-mode, scroll to the top (where the image is) and select down
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# through it one cursor step at a time - the view does not need to scroll
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# for any of this, since the image is already at the top of what is
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# visible.
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$TMUX copy-mode -t inner || fail "copy-mode failed"
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$TMUX send-keys -X history-top || fail "history-top failed"
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sleep 0.2
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: >$TMP
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$TMUX send-keys -X begin-selection || fail "begin-selection failed"
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i=0
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while [ $i -lt 6 ]; do
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$TMUX send-keys -X cursor-down || fail "cursor-down failed"
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sleep 0.15
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i=$((i + 1))
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done
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sleep 0.5
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# No DCS sequence should have been sent - the image's row was never
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# disturbed by any of this. This is expected to fail before the fix - see
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# the header comment.
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dcs=$(grep -ac "$(printf '\033P')" $TMP)
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[ "$dcs" -eq 0 ] ||
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fail "image was retransmitted ($dcs times) while just moving the selection cursor"
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exit 0
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