| Commit message (Collapse) | Author | Age |
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The mouse did not work. Chasing that found something much larger: NO escape sequence
worked on this transport, and had not since the port began.
`vaxis.Parser` resolves a buffer containing nothing but 0x1b as the Escape KEY. That is
deliberate and correct for a terminal, where the kernel hands over a whole escape sequence
in a single read, so a solitary ESC really does mean somebody pressed Escape. A 115200
serial line hands over ONE BYTE AT A TIME - 87 us apart, an eternity to a loop running at
360 MHz - so the first byte of every sequence arrived alone and was resolved as Escape,
and the remaining bytes arrived as ordinary keys.
A mouse click therefore came through as TEN key presses: Escape, `[`, `<`, `0`, `;`, `1`,
`8`, `;`, `3`, `M`. The `0` among them is "go to column zero" in normal mode, which is
exactly where the cursor kept landing, and why the first attempt at this looked like a
coordinate bug. Arrow keys, function keys, and the host bridge's in-band resize reports
were all being taken apart the same way.
Longer partial sequences were never affected: the CSI scanner returns `n == 0` for "no
final byte yet" and the shell already keeps those bytes. Only the one-byte case needed an
answer, because it is the only one the parser answers WRONGLY instead of declining. So the
shell holds a buffer that is exactly one ESC and lets `pardes_p4_tick` release it after
10 ms - two orders of magnitude longer than the 87 us until the next byte of a real
sequence, and imperceptible to a person pressing Escape. The same trade every terminal
editor makes, for the same reason.
Finding it took instrumenting the ABI: printing `@tagName` of every event the shell
applied. Ten `key_press` where one `mouse` belonged is not a thing any amount of reading
the coordinate arithmetic would have shown, and I had already read it twice.
## Mouse reporting, and the 1003 that is not requested
With the sequences intact, `apply` already handled `.mouse` - it mirrors the tty shell - so
enabling reporting was the only missing piece. Spelled out here rather than taken from
`vx.setMouseMode`, which asks for `1002;1003;1004;1006`: 1003 is ANY-MOTION tracking, a
report per cell the pointer crosses with no button held. On a 115200 line that is dozens of
15-byte reports for one sweep, arriving as input the editor must parse while it paints, and
arriving whether or not anyone wants it - moving the mouse over the window would starve
typing. 1002 reports presses, releases and motion while a button is held, which is exactly
what a click and a drag-select need.
Verified on the die: a click at column 12 puts the cursor at column 12 and one at column 22
puts it at column 22, a drag paints a selection, and the wheel scrolls. A press alone paints
the new position and then reverts - the caret does not move until the gesture ends - so the
release is what commits it, which cost an hour of believing a working click was broken.
Screen byte-identical to the vaxis reference, round trip median 3682 us against 3682, snap
95/95, hxdiff 481/0, hxparity 561/0, unit-test, tty/p4/gui all build.
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optional methods
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docs
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over grid cells
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+ snapshot refresh
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snapshots
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Three changes that all turned out to be the same shape -- a feature that
worked in one direction, or for one pane kind, and quietly did not in the
others.
CLIPBOARD. Every register write emitted set_clipboard, so deleting one
character threw away whatever the desktop was holding; multi-cursor yank took
the join's early return and emitted nothing at all, so the same key reached
the clipboard on one cursor and not on two. Nothing could READ the clipboard:
the SDL shell had no SDL_GetClipboardText anywhere in it, and the tty shell
never asked for OSC 52, so `p` from another application was dead in both.
Now it is helix's split. y/d/c/p/P/R and the acme chords are the DEFAULT
REGISTER and nothing else; the system clipboard is five words on helix's own
letters -- SPC y, SPC Y, SPC p, SPC P, SPC R -- spelled as builtins so they
land in Help and are executable like every other verb. The one exception is
the tag `y` chord, which still mirrors out because a tag is always insert, so
SPC cannot be pressed there, and copying the path out is the whole point of
the chord.
Reading is a new read_clipboard effect answered by an ordinary Event.paste, so
the round trip is honest about being one: SDL and NSPasteboard answer inside
the same drain, the browser answers a promise, and a terminal answers over
OSC 52 or -- far more often -- refuses. A refused read is a paste that does
not happen, and the request dies at the next keystroke rather than landing
minutes late in whatever pane is focused by then.
The tty shell also enables BRACKETED PASTE now and coalesces
paste_start..paste_end into one event. Before this a paste arrived as a flood
of individual key presses: plausible in insert mode, and in normal mode every
pasted character ran as a command.
n/N. They stepped the armed results buffer and immediately Looked each row, so
you could not walk past a hit without opening it. They are a MOTION now:
select the next look-able text, open nothing, and let Enter decide. What they
step is the largest whitespace-delimited run look.resolve can act on
(look.lookableSpan, wrapper punctuation peeled), over a RING of panes -- every
pane that has performed a look, most recent first, then the output buffers
that have not, newest first, and only if both are empty the pane in front of
you. N is the exact inverse of n, computed rather than remembered: both
directions ask the same question about the same spans and compare against the
column the walk parks on, so x presses one way and x back land exactly where
you started, pane boundaries and the ring's seam included.
A ring rather than a list with two ends because a shell's cursor sits at the
prompt, below everything it has printed, so a walk that could not come round
would have nowhere to go on the very first press -- which is the case n/N were
written for.
One motion everywhere, no pane-kind or buffer-kind special case. The only
thing a buffer may change is the GRAIN of what a step selects, and it does it
with one flag rather than a branch: output_pane.Traits.commands (renamed from
`executes`, which named one reader's behaviour rather than the fact) makes a
row select WHOLE, because a ThemeSel line is a word to run and has no path
inside it to pick out. `]d`/`[d` are not n/N -- they are helix's diagnostic
motions, their job is to ARRIVE, and they still reach searchStep.
THE TTY PROMPT. Leaving raw tty blanked the prompt row, and the command you
had typed at that prompt shares the row, so it went too -- a shell out of tty
read as output only. OSC 133 marks the row CELL by cell, so the two are
separable: config.tty_blank = .prompt cuts the prompt's own columns and leaves
the command, left-hugged at column 0 in line with the output under it rather
than in a bay of blanks. .prompt_and_input is the old behaviour, kept.
Because the row is now something you can put a cursor in, enterTty adds the
hidden prompt width back before asking ghostty to walk the shell's own cursor
to it -- the modal column on a cut row is short by exactly that much.
Verified: unit-test 186/186 (nine new), snap 87/87 (new ttyprompt.snap),
hxdiff 481 and hxparity 561 with 0 mismatches, tty and gui both build. And
against the real binaries rather than the harness: in a pty, SPC y emits OSC
52 carrying exactly the selection while plain y emits nothing, SPC p issues
the read and pastes the reply, and a bracketed paste of "dd..." inserts text
instead of deleting two lines. In a real SDL window, SPC y then SPC p round
trips through the system clipboard while the default register holds different
text. Setting tty_blank back to .prompt_and_input reproduces all 86 old
goldens byte for byte.
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The SDL shell painted 18,18,18 behind the grid and inside every cell the core
left at its default background, whatever the theme was wearing. Under a light
theme that is a black line along the bottom and right edges of the window --
the strip left over when the window is not a whole number of cells -- measured
two pixels tall with acme at 1728x2102.
The ground is now core.theme().bg, read once a frame, the way PardesView reads
pardes_theme_bg: a Theme command takes hold without a relaunch, and it is the
theme's OWN background rather than the animated chrome colour, because
document backgrounds switch the instant the theme does.
The other half of the macOS fix does not port. A theme that declares no
background (the curated dark, every vendored *_transparent) goes see-through
over an NSVisualEffectView there; here it keeps the terminal-native dark,
because SDL's GPU API refuses to claim a SDL_WINDOW_TRANSPARENT window at all
-- 'The GPU API doesn't support transparent windows', SDL_gpu.c, since D3D12
has no transparent swapchain. Tried it: the shell fails at
ClaimWindowForGPUDevice and exits. bg_default now says so where the next
person will look for it.
Verified on a real window under niri: with Theme acme the bottom strip is
#ffffea where it was #121212.
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It never did — the effect arm was `.watch => {}` with a comment saying a shell
that never delivers the event simply never reloads. That was written as a
deliberate scope cut and it is the whole bug: the user runs pardes-gui.
The tty watcher was fine, and I proved all four suspicions false against a real
binary in a real pty with the write done by a stranger process and NO input
delivered afterwards: the loop does wake (postEvent signals an empty queue),
zig fmt's rename-over does fire MOVED_TO and is caught, three panes across two
directories all reload and closing one leaves its neighbour still following,
and the self-write hash guard does not swallow a real change. The live session
even had its inotify mark on src with the right mask and re-read config.zig
when I touched that directory.
Duplicated rather than shared with tty.zig, the way the two shells already each
own LspJob, forkShell and their pty readers. The headless PARDES_TEST_GRID path
deliberately passes -1: its contract is one frame per scripted input, and a
reload on its own clock would put an unasked-for frame in the stream.
filewatch.snap proved less than it looked. Its real blind spots were the
rename-over shape — the old script only truncated, so it saw CLOSE_WRITE and
never MOVED_TO — multiple directories, and the one that mattered: the suite
only ever runs the TTY binary, so it structurally cannot see a gui-only
regression. It now uses a new `run` directive whose writer is a child of the
RUNNER, so nothing it does reaches an app pty.
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An external update is pushed onto the undo stack exactly like an edit the user
typed, so unsaved work is one `u` away and pardes never has to merge anything.
That is the design, not an implementation detail: the whole feature is
pushUndo() then setContent().
One inotify instance in the tty shell, blocking in readVec through std.Io on a
concurrent task started beside the pty readers — after loop.start(), so the
forkpty ordering is untouched. It watches the containing DIRECTORY, because an
editor rewrites by rename-over and a watch on the file would follow the dead
inode, and it listens for CLOSE_WRITE rather than MODIFY, which is one event per
finished writer and most of the debounce for free.
Our own Save does not reach the undo stack: each watch keeps a hash of the
bytes last seen on disk and save_file restamps it. A hash rather than mtime and
size because the reload has to read the file anyway.
The core stays sans-IO — one watch effect out, one file_changed event in, and a
shell that cannot watch simply never sends the event, which is what the gui and
the web platform do. Linux only; fanotify is what the build system uses and is
rejected in a comment: it exists for thousands of directories across mounts,
and sixteen panes of inotify is a third of the code with no kernel floor.
New golden filewatch: edit without saving, overwrite from a shell in another
column, watch it reload, undo, get the unsaved edit back. None moved.
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Retargeting a key, a mouse chord or a spelling is now an edit to src/config.zig
and nothing else. Three parts in reading order: pardes's own bindings (where a
reader lands), the Look/Exec syntax, then the helix keymap under a banner
saying hxdiff/hxparity are differential suites against real helix, so a key
moved there is a divergence and not a tweak.
The bindings are data a comptime loop can walk, because the builtin index is
going to walk them.
Duplication this cut: is/isC/isA became one hit(key, chords) over ~132 call
sites, and a binding being a LIST collapses the letter-or-arrow chains;
swap_enter_tab is gone, replaced by look_key/exec_key that can point anywhere;
the four focus builtins' h/j/k/l lived hardcoded in two places and is now one
table.
No golden moved.
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their own files
The core now lies FLAT at src/ and every subdirectory is one backend, so a
file being in no directory at all is what says it is core. Pane-kind bodies
leave pardes.zig for term_pane.zig / file_pane.zig / output_pane.zig, leaving
it the layout, the event/effect machine and the generic render loop.
Builtins are one struct each in builtins.zig, and the enum is folded out of
the file's own declaration list at comptime — a zig file IS a struct, so the
list of builtins and the builtins themselves are the same text. Adding one is
writing a struct. Key paths deliberately stay one table for the config pass.
Pure refactor: no golden moved.
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