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fix(vterm): parse VT index operations 

Dispatch ESC D, ESC E, and ESC M as typed full-screen IND, NEL, and RI
operations while preserving the line-oriented parser contract.

Extend both the every-split parser matrix and parser-to-screen integration test
so missing dispatch fails behaviorally rather than only at compile time.
This commit is contained in:
Levi Neuwirth 2026-07-21 15:31:15 -04:00
parent f0a235f635
commit 28f2e6ce66
2 changed files with 15 additions and 6 deletions
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18
src/ansi.rs
View File

@ -924,11 +924,16 @@ impl AnsiParser {
}
b'P' => self.state = State::DcsEntry,
b'X' | b'^' | b'_' => self.state = State::SosPmApcString,
b'7' | b'8' | b'H' | b'=' | b'>' if self.profile == AnsiParserProfile::FullScreen => {
b'7' | b'8' | b'D' | b'E' | b'H' | b'M' | b'=' | b'>'
if self.profile == AnsiParserProfile::FullScreen =>
{
let event = match b {
b'7' => AnsiEvent::SaveCursor,
b'8' => AnsiEvent::RestoreCursor,
b'D' => AnsiEvent::Index,
b'E' => AnsiEvent::NextLine,
b'H' => AnsiEvent::SetTabStop,
b'M' => AnsiEvent::ReverseIndex,
b'=' => AnsiEvent::SetMode {
mode: TerminalMode::ApplicationKeypad,
enabled: true,
@ -2315,14 +2320,17 @@ mod tests {
#[test]
fn full_screen_emits_typed_operation_set_across_every_split() {
let bytes = b"\x07\t\n\x1bH\x1b[2A\x1b[3B\x1b[4C\x1b[5D\x1b[2E\x1b[2F\
\x1b[7G\x1b[8d\x1b[2;3H\x1b[J\x1b[1K\x1b[2X\x1b[3@\x1b[4P\
\x1b[2L\x1b[2M\x1b[3S\x1b[2T\x1b[2;20r\x1b[s\x1b[u\x1b[3g\
\x1b[?1;6;7;25;1000;1002;1003;1004;1006;2004;2026h\
let bytes = b"\x07\t\n\x1bD\x1bE\x1bM\x1bH\x1b[2A\x1b[3B\x1b[4C\x1b[5D\
\x1b[2E\x1b[2F\x1b[7G\x1b[8d\x1b[2;3H\x1b[J\x1b[1K\x1b[2X\
\x1b[3@\x1b[4P\x1b[2L\x1b[2M\x1b[3S\x1b[2T\x1b[2;20r\x1b[s\
\x1b[u\x1b[3g\x1b[?1;6;7;25;1000;1002;1003;1004;1006;2004;2026h\
\x1b[?47h\x1b[?1047h\x1b[?1049h\x1b[c\x1b[>c\x1b[5n\x1b[6n";
let mut whole = AnsiParser::with_profile(AnsiParserProfile::FullScreen);
let expected = whole.feed(bytes);
assert!(expected.contains(&AnsiEvent::Bell));
assert!(expected.contains(&AnsiEvent::Index));
assert!(expected.contains(&AnsiEvent::NextLine));
assert!(expected.contains(&AnsiEvent::ReverseIndex));
assert!(expected.contains(&AnsiEvent::CursorPosition { row: 2, col: 3 }));
assert!(expected.contains(&AnsiEvent::SetScrollingRegion {
top: 2,

3
src/terminal/screen.rs
View File

@ -1587,12 +1587,13 @@ mod tests {
#[test]
fn parser_split_points_produce_identical_screen() {
let bytes = b"ab\x1b[2;3Hc\x1b[31mD\x1b[2J\x1b[Hdone";
let bytes = b"ab\x1b[2;3Hc\x1b[31mD\x1b[2J\x1b[Hdone\x1bE\x1bM\x1bD";
let mut whole_parser = AnsiParser::with_profile(AnsiParserProfile::FullScreen);
let mut whole = screen(3, 8);
for event in whole_parser.feed(bytes) {
whole.apply_event(event);
}
assert_eq!(whole.snapshot().cursor, Some(CellCoord::new(1, 0)));
for split in 0..=bytes.len() {
let mut parser = AnsiParser::with_profile(AnsiParserProfile::FullScreen);
let mut split_screen = screen(3, 8);