[dependabot]

Bumps vt100 from 0.16.2 to 0.18.1.

Changelog

Sourced from vt100's changelog.

[0.18.1] - 2026-10-19

Fixed

• actually release the intended changes that were supposed to be in 0.18.0

[0.18.0] - 2026-10-18

Added

• Screen::contents_formatted_basic, which is like Screen::contents_formatted, but restricts escape sequences to SGR escapes only, and control characters to '\n'.
• Screen::write_contents_formatted_basic, like Screen::contents_formatted_basic but writes to any type implementing std::fmt::Write instead of returning a String.
• Callbacks::on_scroll, called when a row scrolls off the top of the scrollback. This enables capturing terminal output in a streaming fashion. Currently this can only be used to obtain the row contents in the "basic formatted" style (the same returned by Screen::contents_formatted_basic).
• Parser::DEFAULT_ROWS and Parser::DEFAULT_COLS, set to 24 and 80 (the same already used by Parser::default). These have type NonZeroU16.
• Parser::set_size, which is like Screen::set_size but calls the on_scroll callback when a row is pushed off the top of scrollback (which is now possible due to the other set_size changes).
• Parser::screen_and_callbacks_mut, which returns mutable references to both the screen and callbacks object at once. This was not possible with the existing methods.
• capture::basic_formatted_to_plain, which converts a basic formatted capture (as returned by Screen::contents_formatted_basic) into a plain text one without allocating.
• capture::basic_formatted_rows, which splits a basic formatted capture into individual rows without allocating.
• capture::basic_formatted_to_plain_indexed, which is like capture::basic_formatted_to_plain, but also includes the original index of each plain text substring.

Changed

• Bumped MSRV to 1.85 and edition to 2024

• Parser::new and Screen::set_size now take NonZeroU16s instead of u16s. Passing 0 for rows or cols was not supported and resulted in panics. Additionally, Screen::size now returns NonZeroU16s.

• The following methods of Screen now return/yield strings rather than byte vectors:

  • attributes_formatted
  • contents_diff
  • contents_formatted
  • cursor_state_formatted
  • input_mode_diff

... (truncated)

Commits

• fb0f54e changelog and version bump
• b88a5a1 a few tweaks to github actions
• c20819d feat: add capture::basic_formatted_to_plain_indexed (#38)
• 17965e8 perf: trim trailing blank cells from scrollback rows (#36)
• a87517b feat: make vertical resizes more closely match real terminal emulators even w...
• 33abc97 feat: change behavior of set_size (#31)
• 46d1dfb feat: add Parser::screen_and_callbacks_mut (#29)
• 04d933f feat: add basic formatted capture utilities, fix: fix handling of triple-widt...
• 1102dff feat: make Screen::size return NonZeroU16s (#26)
• 32e8a3e fix: respect alternate screen in Screen::contents_formatted_basic (#24)
• Additional commits viewable in compare view

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[vyncint]

The bump needed more than the API port, so three commits sit on top of Dependabot's, plus a merge of main (the branch predated #606, and a plain squash would have reverted its lockfile bumps).

API port. Sizes are NonZeroU16 at vt100's edges; termlens never asks for zero (the builder's floor is 2).

What the whole suite missed and a behaviour probe found. 0.18 resizes as xterm does: a shorter screen pushes rows into history, a taller one pulls them back. With that:

• the attribute shadow had no history when styled history was off, so after shrink → grow its grid came back blank and the lockstep debug_assert fired ("the attribute shadow diverged from the primary grid"). It now keeps the primary's history.
• the history copy treated any shorter history as RIS and restarted. Rows pulled back onto the grid now leave the copy; RIS and ED 3 (CSI 3 J, now implemented upstream, sent by clear) are announced by the tracker and fed alone, so the copy restarts explicitly. Inferred from the length, clear followed by more rows than the mark held lost the first of them.
• nothing is captured while the alternate screen is up — that was Leaving the alternate screen duplicates every scrolled-off history row #576.

Upstream fixes this brings: #577 (the wide-character resize panic: reproduced on 0.16.2 — row.rs:89 index out of bounds — and gone on 0.18.1), #578 (REP), HVP/HPA (silently ignored on 0.16: abc\e[1;1fX drew abcX), IL/DL outside the scroll region, VS16 emoji width.

Verification. Eight new unit tests; five mutations of the fix (no alternate-screen guard, shadow without history, shorter history read as a reset, tracker not announcing ED 3, ED 3 on the alternate screen restarting the mark) each fail the tests they should. Full workspace suite, clippy, rustdoc -D warnings, DCO and attribution gates pass locally. The behaviour differences a snapshot can show are listed under Changed in the CHANGELOG.

[vyncint]

Reviewed with the port on top: 16/16 checks green; behaviour verified with a probe against 0.16.2, and every fix in the history capture pinned by a test that a mutation of the fix fails.