draw-rect wrote \n after each row's fill, including the last row at
the bottom of the frame. This caused a terminal scroll, shifting all
content up by 1 and leaving the last row blank (terminal default bg).
cursor-move-escape at the start of each iteration already repositions
the cursor — the \n was never needed.
The OR pattern inside backend-size used (or (multiple-value-bind ...)
...), but multiple-value-bind only returns the primary value of its
body. When the env-var shortcut was removed, both calls to backend-size
(the cols nth-value 0 and rows nth-value 1) returned the same primary
value, making rows always nil.
Restructure with nested multiple-value-bind/values chains so both
return values propagate correctly through all fallback stages.
Also remove MY_TERM_COLS/ROWS env-var pre-check — it returned stale
startup dimensions after terminal resize.
backend-write flushed output after every single draw-text/draw-rect
call, causing hundreds of individual flushes per frame. This caused
visible flicker on slow terminals.
Remove finish-output from backend-write — all critical flush points
(initialize-backend, shutdown-backend, enable-mouse, enable-bracketed-paste,
end-sync) already call finish-output explicitly.
DECICM sync (begin-sync/end-sync) wraps every frame boundary,
making the frame render atomically with a single flush at end-sync.
Application code (passepartout TUI) calls draw-text with a framebuffer
(2D array) as the first argument, but draw-text only had methods for
framebuffer-backend CLOS instances. Added a method on array that sets
cells directly on the framebuffer array, matching make-framebuffer's
return type.
Bug fixes:
- Fix OSC8 format strings (backslash escape layering) in modern-backend.org
- Test format string had single backslash instead of double, causing
unclosed CL string that cascaded through 3 subsequent test forms
- Implementation format string had leading escaped quote (not a string
opener) and triple-backslash ending (also not a string terminator)
- Fix missing closing parens in border-char-rounded and border-char-double tests
- Fix ASDF input-tests pathname (file lives in tests/, not src/components/)
New features:
- Implement suspend-backend / resume-backend protocol methods
- modern-backend: exit/enter alt screen, re-enable mouse/kitty/bracketed-paste
- simple-backend: no-ops (no terminal state to preserve)
Infrastructure:
- Update test suite to cover suspend/resume (backend + modern-backend suites)
- 454 checks, 100% pass across 14 test suites
The osc8-link implementation and its test both had doubled
backslashes (\\ -> \\) in their format strings, producing two
literal backslashes at runtime instead of the single backslash
needed for the OSC 8 string terminator (ST = ESC \).
Fix: change \\ to \\ in both the implementation and test format
strings. The tangled .lisp files now have correct escaped
backslashes (\) producing one backslash in the runtime string.
Additionally clean up a patch artifact that left a stray backslash
before the opening quote.
