mirror of
https://github.com/tmux/tmux.git
synced 2026-10-06 17:49:52 +00:00
151 lines
3.6 KiB
Bash
Executable File
151 lines
3.6 KiB
Bash
Executable File
#!/bin/sh
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# Check that synchronized scrolling does not redraw unchanged lines.
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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 PATH TERM LC_ALL
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[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
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DIR=$(mktemp -d) || exit 1
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TMUX_TMPDIR=$DIR
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export TMUX_TMPDIR
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INNER="$TEST_TMUX -Li$$ -f/dev/null"
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OUTER="$TEST_TMUX -Lo$$ -f/dev/null"
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CLIENT_BYTES=$DIR/client-bytes
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CONTROL=$DIR/control
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EMITTER=$DIR/emitter.pl
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fail()
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{
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echo "$*" >&2
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exit 1
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}
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cleanup()
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{
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$OUTER kill-server 2>/dev/null
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$INNER kill-server 2>/dev/null
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rm -rf "$DIR"
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}
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trap cleanup 0 1 15
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wait_for_file()
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{
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i=0
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while [ "$i" -lt 50 ] && [ ! -e "$1" ]; do
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sleep 0.1
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i=$((i + 1))
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done
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[ -e "$1" ] || fail "$2"
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}
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wait_for_client()
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{
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i=0
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while [ "$i" -lt 50 ]; do
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$INNER list-clients -F '#{client_termfeatures}' 2>/dev/null |
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grep -q 'sync' && return 0
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sleep 0.1
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i=$((i + 1))
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done
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fail "sync-capable client did not attach"
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}
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wait_for_stable_bytes()
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{
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previous=-1
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stable=0
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i=0
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while [ "$i" -lt 50 ]; do
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current=$(wc -c <"$CLIENT_BYTES" 2>/dev/null) || current=0
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if [ "$current" -gt 0 ] && [ "$current" -eq "$previous" ]; then
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stable=$((stable + 1))
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[ "$stable" -eq 5 ] && return 0
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else
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stable=0
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fi
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previous=$current
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sleep 0.1
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i=$((i + 1))
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done
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fail "client byte stream did not become stable"
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}
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cat >"$EMITTER" <<'PERL'
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use strict;
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use warnings;
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my $control = $ENV{CONTROL};
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(my $dir = $control) =~ s{/[^/]+$}{};
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# Fill the screen outside a synchronized update.
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my @rows;
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for my $row (1 .. 24) {
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push @rows, substr(sprintf("INIT_ROW_%02d_", $row) . ('X' x 79), 0, 79);
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}
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syswrite STDOUT, "\e[H" . join("\r\n", @rows);
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open my $painted, '>', "$dir/painted" or die "$dir/painted: $!\n";
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close $painted;
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while (!-e $control) {
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select undef, undef, undef, 0.01;
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}
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# Scroll one line and overwrite text in a synchronized update.
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my $frame = "\e[?2026h" .
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"\e[24;1H\r\nSCROLLED_LINE_" .
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"\e[23;60HCHANGED_" .
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"\e[?2026l";
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my $written = syswrite STDOUT, $frame;
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die "short synchronized frame write\n"
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unless defined $written && $written == length $frame;
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select undef, undef, undef, 3;
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PERL
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$INNER new-session -d -s inner -x 80 -y 24 \
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"CONTROL='$CONTROL' perl '$EMITTER'" || exit 1
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$INNER set-option -g status off || exit 1
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$INNER set-option -g window-size manual || exit 1
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$INNER set-option -as terminal-features '*:sync' || exit 1
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$OUTER new-session -d -s outer -x 80 -y 24 \
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"$TEST_TMUX -Li$$ -f/dev/null attach-session -t inner" ||
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exit 1
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$OUTER set-option -g status off || exit 1
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$OUTER set-option -g window-size manual || exit 1
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wait_for_client
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wait_for_file "$DIR/painted" "application did not paint"
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sleep 1
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$OUTER pipe-pane -O -t outer:0.0 "cat >'$CLIENT_BYTES'" || exit 1
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: >"$CONTROL"
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i=0
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while [ "$i" -lt 50 ]; do
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grep -q 'SCROLLED_LINE_' "$CLIENT_BYTES" 2>/dev/null && break
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sleep 0.1
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i=$((i + 1))
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done
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grep -q 'SCROLLED_LINE_' "$CLIENT_BYTES" || fail "scrolled line not sent"
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wait_for_stable_bytes
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$OUTER pipe-pane -t outer:0.0 || exit 1
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# Check that only changed lines are redrawn.
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grep -q 'CHANGED_' "$CLIENT_BYTES" || fail "changed cell not sent"
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if grep -q 'INIT_ROW_05_' "$CLIENT_BYTES"; then
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fail "unchanged line redrawn after synchronized scroll"
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fi
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# The client must show the scrolled screen.
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$OUTER capture-pane -p -t outer:0.0 >"$DIR/screen" || exit 1
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sed -n 1p "$DIR/screen" | grep -q '^INIT_ROW_02_' ||
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fail "first line not scrolled"
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sed -n 23p "$DIR/screen" | grep -q 'INIT_ROW_24_.*CHANGED_' ||
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fail "changed cell not on screen"
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sed -n 24p "$DIR/screen" | grep -q '^SCROLLED_LINE_' ||
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fail "scrolled line not on screen"
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exit 0
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