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With the line run under job control (the change before), the job running
has a group of its own, and Kill's SIGTERM to the tty's foreground group
stopped only that job: of `sleep 30; touch x` the touch still ran. For a
command pane the hosts now signal the shell's group as well, so the whole
line stops, as it did; a line typed at a prompt still loses only its
foreground job. The test forks a real pty for both halves: a background job
outliving its command and the pty's hangup, and a killed line not running on.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A dogfood agent ran `exit 3` through pty/run: the reader got ENOENT, and
the log went straight to del. The hosts now read a shell's exit status at
its pty's end as they do a command's; a run waiting on the line answers
`exit 3` with what it printed, the log says `exit <serial> 3` before
the pane's `del`, and an open run still stats after its pane is gone
(cat fstats its input). Pins cloud9 f35b7ed, whose stat of an open fid names
its open. Writes to a gone pane's pty/data, held open or not, fail ENOENT.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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acme's frame wraps a tag at its right edge and the window grows to show
every row (wind.c wintaglines); Tagup/Tagdown shrink it to one row and back.
Pane tags used to be one row, scrolled sideways to the caret. Now a tag's
lines wrap at its width (one cell kept for the caret past a full row) and it
starts expanded; insert-mode Up on the first row collapses it, Down on the
last row expands it, and Alt-Up/Alt-Down do so in either mode. A word the
wrap breaks across rows is still one word to a click and a selection.
Column and workspace tags keep scrolling sideways.
Tests read body rows relative to the body's first row; the 41 snapshot
goldens that moved were re-recorded by name after a programmatic check that
each differs only by body rows shifting under the taller tags, and twelve
scripts whose clicks targeted fixed rows now click the same text.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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names the path and why
The write answered ok and the pane stayed dirty, with `save: AccessDenied` on its message row: a script saw success. The failure now says `Save <path>: <why>`, and a 9P write that waited on the save fails with EIO and that text, logged as an err record.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Stage 9 review: a user's Shadertoy file goes to glslc on its stdin, so no
source file is written anywhere (the old predictable name under
XDG_RUNTIME_DIR or /tmp was a symlink-clobber hazard). std's spawn does
all its allocation before fork and searches PATH on the stack after it,
said at the call. Level A redraws are paced by the display's refresh rate
(SDL_GetCurrentDisplayMode), not a fixed 16 ms.
Shared files touched: gui.zig.
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rewritten as Shadertoy files
Stage 9 of docs/render-pipeline.md. src/gui/Post.zig runs the chain over
the finished frame: each pass reads the one before, ping-pong textures
between, the last writes the window; an empty chain is the direct path.
The prefix (shaders/post/prefix.glsl) is ghostty's uniform block, name
for name and offset for offset (tested against a copy of its Uniforms, the
selection colours by their GLSL names), at SDL GPU's bindings, y down.
A user's file (Shader <path>) is compiled by glslc with compileGlsl's own
flags on a thread of its own, taken in at the next loop step; errors name
the file's own lines; a failed compile keeps the last good pipeline;
glslc missing is said once. The bundled passes compile with the build,
through the same prefix.
Crt, Ripple and Glitch are Shadertoy files, rewritten: no barrel (input is
identity, tested), everything in linear light and dithered, keyed to iTime.
scene_effects, crt.zig and crt.frag.glsl are gone; the core keeps no clock
for the chain. ShaderAnimation off|on|always drives redraw level A: the
chain alone over the retained frame (34 us CPU a redraw, measured).
Shared files touched: pardes.zig (nextWake loses the scene line,
disableSceneEffects empties the chain, two tests), builtins.zig (one switch
arm), ninep/ctl.zig (two switch arms), macos.zig (flags from the chain),
gui.zig. Not touched: Messages.zig, mouse.zig, detached/*, host_io, tty.
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Generalises vowtymmr (review): a pane sliding, zooming or opening over a
neighbour covers that neighbour's notice as a closing one does. Tier 4
holds notices only while nothing moves.
Shared files touched: gui.zig.
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Tier 4 draws notices over every group; while a pane closes, a notice goes
back to its own pane's group instead, so the tombstone sliding over it
covers it as it did before stage 8. Review follow-up to stage 8.
Shared files touched: gui.zig.
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Stage 8 of docs/render-pipeline.md. The frame is drawn in groups: tier 0,
one per track in paint order (tiers 2 and 3), tier 4 (notices, then guides
and the debug box), tier 5 (bar cursors), each cells, images, decor. Decor
(rules, rails, thumbs, grip marks, spines, the workspace and column rules,
the bottom band, notice rules, bar cursors) is whole-pixel rects through
the new decor.frag over ui.vert, so it carries its track's transition and
clip. A closing pane's chrome comes from Surface.previous_regions.
Deleted: taglineBaseRgb, topbarPaneBorderHeight, bottomTaglinePresent,
frameChromeBg, cellBackgroundIs and the rail inference, paneGripCell's
scan, transient_on, PaintPlan. One cover map (coverFrame) is marked from
the layers and regions once a frame. New regions column, guide and debug;
Surface.chrome is the palette, carried in wire v8 (not shipped yet), so an
attached GUI draws the same chrome (test). A per-instance clip replaces the
vertical transition's scissor.
Goldens: 01-12 byte-identical. 13-17 differ only past the grid: the image
pass left its scissor at the grid's size, cutting rule ends, rail feet and
the bottom band in the leftover pixels whenever a picture was on screen.
16-debug now shows the debug box, which a context-row layer had hidden.
18-mid-transition is new: virtual clock (PARDES_TEST_CLOCK in the GUI),
PanelSlide Newcol with the picture, frame 6 of 12.
Also: the GUI sleeps when idle instead of polling every 16 ms, and a
minimized or occluded window sleeps through animation. Tracy 'gui frame
build' at 200x60: 992/1015 us median before, 989/987 us after.
Shared files touched: pardes.zig (one export), detached/client.zig,
detached/server.zig, detached/wire.zig (all additive), gui.zig. Not touched:
Messages.zig, mouse.zig, tagline.zig, colors.zig, tty.zig, host_io.zig,
dump.zig, exec.zig, panes.zig.
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of rows; wire v8
src/Layer.zig merges TagLayer and BodyLayer. `rows` (0 = no layer) and a
cursor at {x, y}. A tag of N rows is ONE layer of N grid rows: tagHit answers
the row as `line`, bodyHit keeps its meaning, and the per-line layer bases
(TAG_LINE_LAYER_BASE, HEADER_LINE_LAYER_BASE) are gone, not aliased.
Wire v8, the one bump: tag layers carry rows and cursor y, and the frame
carries the placed region list. v7 and v9 peers are refused in both
directions (server test over both, a new frontend test over both).
web: tag_layer_value 11 = rows, 12 = cursor y; app.mjs lays every row.
macOS: the Zig side compiles against Layer; pardes.h still sees one row
per tag layer (accepted, the macOS shell is ignored for now).
No visual change: snapshot goldens and the 17 GUI goldens byte-identical.
Shared files touched: pardes.zig, Messages.zig, gui.zig, macos.zig,
detached/client.zig, detached/server.zig, detached/wire.zig (plus web.zig,
app.mjs, edit.zig, look.zig). Not touched: mouse.zig, tagline.zig,
colors.zig, tty.zig, dump.zig, exec.zig, host_io.zig, panes.zig.
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A shell now answers Host.now, its monotonic clock in ns, and the pump
advances core animation to it: one .tick per whole 16 ms frame since core
time last stood still. The same animation therefore takes the same time at
60, 120 and 144 Hz, over ssh and after a slow frame (the GUI's re-armed
clock ran them ~25% slow at 144 Hz; the tty's post-frame sleep drifted).
nextWake() lists every core animation in one place: a frame from now while
anything moves, the end of the wait while something only waits (a message
lingering, the look-hover delay), null when idle. Shells sleep exactly that
long, and a wait is jumped to its end in one step, so an 800 ms linger
costs one frame instead of fifty. An overshoot under 1.5 ms after a step is
let go: at 60 and 120 Hz every display frame takes exactly one step (a 16 ms
frame against a 16.67 ms vsync would otherwise double-step every 24th).
The six tick drivers are gone: tty's timer thread only times the wait,
interruptibly (a newer, shorter request cuts short a sleep still timing a
longer one); the GUI's
AnimationClock, web's JS tick bank (pardes_tick now takes rAF's timestamp),
the detached server's and the board's ticks; grid mode steps a virtual
clock straight to each wake. PARDES_TEST_CLOCK, set by the snapshot
harness, gives tty and the detached server the same virtual clock.
Every stepped frame is drawn. The old pump never drew the last frame of a
fade (a .tick asks for no frame, and the fade was over by the check), so a
theme switch stopped at 9/10 of the way until the next input: theme.golden,
themesel.golden and the GUI's acme-light scene move to the theme's true
colours, and nothing else changes. The frozen previous grid is captured only
while a panel transition is chosen, not on every idle frame.
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Pure moves, no behaviour change. draw.zig holds the whole core frame in
order: render, the pane, tag, header and notice painters it calls, and the
character-effect composition (Pardes.render stays a declaration alias).
Presentation.zig is the panel presentation state as a file struct, and
animation.zig the easing curves, transition kinds, tracks and boxes, the
character effects' sources and the generic displayed-value transition, all
of which lived in layout.zig. layout.zig keeps only layout.
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Registers.zig replaces the one yank buffer: every register keeps a value per
range, y fills them in document order, and p, P, R and insert Ctrl-r put
value i at range i, repeating the last (helix paste_impl). "<reg> names the
register for the next command; _ swallows, # numbers the ranges, . is each
range's text, % the file's name, / the last s/S pattern, and + and * are the
system clipboard through the ClipYank and ClipPaste paths. SPC y now writes
+ alone, as helix's does. The acme chords and a paste into a terminal take
the default register joined by newlines. The msel-yank-paste waiver is gone.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A failure read `Del k|j: InvalidArgument`, `Kill: NoSuchCommand`, `ill-formed control message`, or nothing at all. reportError now spells an error's name as words, and the refusals name their accepted forms: pty/ctl lists its verbs, a flag file takes 1 or 0, a setting word takes on or off, Del takes k, j or nothing, Repl takes - or a language. Kill with nothing to stop says so, /focus says pane, a Look that found nothing says no match, and pty/run on a command pane says it is not a shell. A ctl write's failure has room for the Repl list and is cut between words, the Repl word at a character.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The watcher woke the host a second time 60 ms after the exit by its own clock
while the grace was counted from the reap: a host busy for 10 ms missed it,
and the tag said running for ever and Kill did nothing; and under load exit 0
could land before the last output. As decided, no timer: the exit is told
once it is reaped and the pty says nothing is left (poll: no POLLIN, and no
POLLHUP, which means the end of file is on its way behind the output), else
at that end of file, checked after each chunk of output. The tty host checks
inside its step so the frame shows it. The four hosts' copies are one
host_io.takeExits/commandEof, which close a told command's pty at its end of
file (the fd and the GUI's reader leaked when the exit came first). A
finished command pane whose pty a job it left still holds is not reused, so
that job is not hung up; and the reset before a reuse is SGR 0, not DECSTR,
which ghostty's stream does not implement.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A signal effect carried only a slot, so a Kill followed in the same step by
the pane's closing and its slot's reuse signalled the new pane's child; and a
command pane whose child had exited and been reaped kept a process group id
another process could take. The effect now carries the pane's serial, checked
as it is performed, and a host signals no command whose exit it has recorded;
the core already sends Kill only to a command it has not been told is done.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A job left in the background (sleep 100 &) held the pty open, so the pane
stayed running and the child a zombie until the job ended; a command that
closed its terminal and ran on got its end of file at once, the host waited
100 ms for an exit, reported exit ? and hung it up. Now each command's child
is watched on a thread (waitid with WNOWAIT, so its pid stays its own until
the host reaps it), and the host tells the core the exit from that: after the
pty's end of file, so the output before the exit is in, or 50 ms after the
exit without one, a job holding the pty. The pty stays open until both, so a
command that let go of its terminal is never hung up by it. All four front
ends; a host that cannot start the watcher reads the exit at end of file as
before. Tests: host_io's for both cases, and cmdexit.snap end to end.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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shell's prompt
A middle click, an exec write or a tag word that no builtin knows was typed
into some terminal for the pane's directory, sharing whatever state that
shell was in and answering nothing, so a misspelling vanished into a shell.
Now only a line clicked at an interactive terminal's prompt is typed there.
From anywhere else it runs as a command pane: a terminal whose child is
$SHELL -c the line in the pane's directory, full emulation, which shows its
output and then exit N from the host's reaping of the child, and stays. A
finished command pane is the next command's for its directory, which runs
below what it showed after a '% line' line (acme appends to +Errors and never
clears it, util.c:213); a running one gets a second pane. Kill ends a command
pane's whole process group, the log records run and exit, exec reads back the
command pane's serial, and a line is at most 1 KB, read off the pane as the
host forks rather than carried in every spawn effect. ttyForDir's search for
a free shell is gone. The goldens of chordcut, cmdword and layout-open change
where a file's exec now opens a command pane, and ttytaken is rewritten to
exec from the terminal itself; docs/open-questions.md records the decision.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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and restores
A client that wrote Restore saw its connection cut with no answer, and could
not tell a Restore from a crash. The listener now lets the writer's answer out
before the cut, and cuts only the old editor's connections, refusing their
requests meanwhile; a client that dials during it is the new editor's and
stays. Dump logs 'dump <path>' and the restored editor's log 'restore <path>'.
Keeping connections across a Restore was weighed and left: the fids name the
old editor's panes and opens, so it would mean carrying serials and open
records into the new one, where acme's Load only adds windows. tty's Restore
also closed its shells' ptys without reaping them; it retires them now.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Kill queued a signal effect for later, so the job it saw running by its marks
could have ended, and another started, before the signal went; and with job
control off the job shares the shell's process group, so the host skipped it
and Kill reported nothing. Kill now calls the host's kill_job while it holds the
turn, and when the only job is the shell's own group says 'Kill: no job to
signal', which also fails a write of Kill to ctl.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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the hangup
tty and macOS hung the pty up and called waitpid once without waiting, so a shell
still exiting, or one that ignores SIGHUP, stayed a zombie or ran on with nobody
reading it; tty also never reaped a shell that exited by itself, and its spawn
into an occupied slot closed the old pty without ending the shell. host_io's
retireShell says hangup, waits 100 ms on a thread (macOS has no host timer to
poll from), then kills and reaps. The gui's own retired list, when full, left the
slot holding the old shell and refused the next spawn into that pane; it now
hands that shell to retireShell instead.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The detached server closed a pane's pty only when the shell was respawned,
hit EOF or the session shut down, so rmdir, Del or Delcol on a terminal
left its shell running with nobody to read it; the tty front end and
macOS did the same. Retiring a terminal pane now emits a close_pty
effect, which each host that runs shells answers by hanging the pty up
and ending the shell (the detached server's and the GUI's existing
retire-and-reap path, and a close plus SIGHUP in the tty and macOS
shells).
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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With tags reduced to Texts, what is left of them is the computed prefix, the
default and saved tails, entering and leaving a tag and the headers: that goes
to tagline.zig, as acme keeps the tag half of a window in wind.c. Tag and
header drawing moves next to body drawing in body_layer.zig, and the tag hit
helpers go to tag_layer.zig with the Hit they read, where sameCell now also
tells the lines of a taller tag apart. The docs describe the tag as a Text.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A header is a Text like a pane's tag, so a newline typed or pasted into it
should show rather than hide the lines after the first; the panes below move
down to make room, as they do for a taller pane tag.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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A tag that is a text can hold a newline, and the tagline, the body under it
and the pointer all assumed one row. The pane's tag now takes a row per line
(up to eight, and never the body's last row); the body starts below it, the
rows a pointer counts start the body after the tag's lines, a click on any
line puts the tag's cursor there, and a pixel shell gets a tag layer per
line. A tag of one line draws exactly as before.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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The headers had their own one-line editor with its own keys: Enter always
executed, h/l and J/K moved between headers and panes, Ctrl-c/x/v cut and
pasted, and TagLine refused a newline that 9P accepted. They are now Texts
like a pane's tag, with no prefix and a default until edited, so normal and
insert mode, undo and the look and execute keys are the body's. Moving
between them is the window keys' job: Up from a pane with nothing above it
reaches its column's tag and then the workspace's, Down comes back, and
Left and Right walk the column tags.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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acme keeps what edits a text in its Text (dat.h:171-190) and the window
holds a body and a tag of that type. The cursor, the selections, the modal
state and the edit-buffer undo move off Pane into Text.zig, Pane holds
them as its body, and the edit and normal-mode operations take the Text
they edit. Nothing changes in behaviour; this is the step that lets the
tag become a second Text.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Not a pure move: state moves. Pardes's `pipe_seq` and `pipe_wait` become
Pipe.zig's own fields `seq` and `wait`, and Pardes embeds one as
`pipe: Pipe = .{}`. pipeRequest reads only the request in flight, so it now
takes `pipe: *const Pipe` and the four shells call
`core.pipe.pipeRequest(id)` (their Pipe imports go away again); the other
pipe functions still need the panes and keep `p: *Pardes`, writing
`p.pipe.seq/wait`. Field reads in dump.zig, the shells' tests and two test
files follow (`core.pipe_wait` becomes `core.pipe.wait`). No behaviour
change.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Pure move, no behaviour change: the editor half of `|` that the earlier
change put at the end of selection_pipe.zig (PendingPipe, pipeMarker,
submitPipe, pipeRequest, pipeFailed, pipeCut, pipeOutput, pipeResponse,
and the eight pipe tests with nextPipeEffect) now lives in its own
Pipe.zig, so the pipe's editor state can become Pipe's own fields next.
selection_pipe.zig goes back to exactly what it was before this series: the
native runner and the boundary values the shells hand to their workers.
The moved code names the runner's types as `selection_pipe.X` again, as it
did in pardes.zig; callers change from `selection_pipe.submitPipe(p, ..)`
to `Pipe.submitPipe(p, ..)` (pardes.zig and the four shells).
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Pure move, no behaviour change (acme keeps dump and load in rows.c):
dumpState, restore, initFromDump and initDump go verbatim to the end of
dump.zig, after the dump format they read and write. Inside dump.zig the
moved code's `dump.` prefix drops, so `Pane` there is the dump record; the
one editor pane it names is spelled `pardes.panes.Pane`, and its other
`panes.X` references become `pardes.panes.X` because dump.zig's own tests
use `panes` as a local name.
The methods become free functions taking `p: *Pardes`: `p.dumpState()`
becomes `dump.dumpState(p)`, `core.restore(bytes)` becomes
`dump.restore(core, bytes)` and `Pardes.initFromDump(..)` becomes
`dump.initFromDump(..)`, in pardes.zig, the shells, layout.zig,
Terminal.zig, builtins.zig and the tests (38 receiver rewrites plus the
initFromDump calls). The tag-tail restore helpers stay with the tag code.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Pure move, no behaviour change: the Message stamp helpers, LoggedMessage,
setStatus, setMessage, showMessage, dismissMessage, dismissLine,
advanceMessages, advanceLine, messagesAnimating, MessageMotion,
messageFrames, messageMotion, noticeText, noticeLife, blendRgb,
logMessage, messageLog, reportError, the notice painters (leaderText,
noticeCols, Printed, printRight), collectNotices, and the six message
tests go verbatim to Messages.zig.
The methods become free functions taking `p: *Pardes`. setStatus,
setMessage and reportError are called from ~170 places as `p.setMessage(..)`,
so Pardes keeps three declaration aliases (`pub const setMessage =
Messages.setMessage;`) and those call sites stay as they are; every other
call changes from `p.x(..)` to `Messages.x(p, ..)` (46 of them). The five
shells' `pardes.Pardes.Message` become `pardes.Messages.Message`. The
message ring's fields stay on Pardes for now; moving them into Messages is
a separate change.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Pure move, no behaviour change: submitPipe, pipeRequest, pipeFailed,
pipeCut, pipeOutput and pipeResponse, the PendingPipe they share,
pipeMarker, and the eight pipe tests with their nextPipeEffect helper go
verbatim to the end of selection_pipe.zig, so the whole of `|` (runner,
boundary values, prompt, request and atomic edit) is one file. Inside that
file the `selection_pipe.` prefix drops; the file doc now says it holds both
halves.
The methods become free functions taking `p: *Pardes`: the four shells'
`core.pipeRequest(id)` become `selection_pipe.pipeRequest(core, id)`, and
pardes.zig's two calls change the same way. pushUndo becomes pub because
the pipe's edit calls it; PendingPipe.deinit becomes pub for Pardes.deinit.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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Any new glyph re-uploaded the whole 2048x2048 atlas: 4 MB copied into the
transfer buffer and then to the texture, about half a millisecond of CPU on
the frame, and the GPU's copy on top. Glyphs fill the atlas pen-style, a band
of rows at a time, so a frame's new glyphs sit in a band a cell or two tall.
The atlas now keeps the rows drawn into since the last upload (cachedGlyph
widens them by each raster's rows: plain glyphs, ligature strips, tagline and
grip glyphs alike), and uploadAtlas copies and uploads just those rows, at the
same offset in the transfer buffer as in the stage; the texture keeps the
rest. A reset (a font, size or tagline change) marks every row, as
the texture's first upload does, so those still send the whole atlas. A test
replays uploads over glyphs of every kind and a reset, and checks that no row
outside the dirty rows ever differs from what the texture holds.
Hidden captures of 27 layouts, including new glyphs typed and printed, font
and size switches, and Ligatures off and on, are byte-identical to before.
Over 10 interleaved rounds (160x50 cells), a frame that draws new glyphs
spends 12-50 us uploading instead of about 0.5 ms: a terminal printing twelve
new glyphs a line goes from 1.04 to 0.55 ms of renderFrame CPU on such frames
(-34% over the scenario's frames, 9 of 10 rounds faster, -20% to the GPU
fence), a typed glyph's frame from 0.89 to 0.38 ms, and opening a file of 600
new glyphs from 9.1 to 8.7 ms. The first frame and a font size change still
upload everything and cost what they did; other frames are unchanged.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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for each cell
renderFrame skips the grid cells a body or tag layer paints itself, and it
asked which those are cell by cell: for every cell, twice a frame (counting
instances, then emitting them), bodyLayerAt and tagLayerIn walked all 16 body
layers and all 119 tag layers. In a ReleaseFast profile of a full screen of
src/pardes.zig those walks were about a third of the gui's CPU samples.
coverLayers now fills each live layer's rectangle into a per-cell map once a
frame, and the loops read one byte. The loops only ever asked whether some
layer covers a cell, never which, so overlap order does not enter into it; the
map marks exactly the cells the walks found: a tag layer only its viewport's
first row, and a viewport past the grid only the grid's part of it. The loops
over the layers a panel transition leaves get a second map, built only while
one runs.
A test holds the map to the old walk over a core's layouts (columns, stacked
and collapsed panes, column tags, Tagbottom, message and leader chips) and
3000 random layer sets, some past the grid's edges or at the top of u16.
Hidden captures of 27 layouts (message and prompt chips, a column grip rail,
a PDF, an image, font and tagline changes), with and without leftover edge
pixels, are byte-identical to before.
Over 10 interleaved rounds (160x50 cells), renderFrame's CPU a frame falls
from about 2.0 ms to 0.32-0.37 ms idle, scrolling, typing, under terminal
spew and over a PDF (-82 to -84%, every round), and cell emission from about
1.07 ms to 0.27 ms. The first frame's CPU goes from 6.2 to 4.6 ms.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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The SDL shell shapes words with HarfBuzz, so a font's `->` and `!=` draw as
ligatures, and there was no way to have the plain glyphs back short of
changing font. `Ligatures` is a toggle, on by default; off, no cell goes to
the shaper and every cell draws its own glyph, exactly as a font without
ligatures does.
It exists only where it means something. A new `ligatures` capability, true
for the gui shell alone, gates it like Font and WindowOpacity are gated: it is
not a builtin elsewhere, has no leader path, and Config does not list it,
rather than print a row the TTY could never change. macOS draws CoreText
ligatures of its own, but nothing there reads the setting, so it stays off
there. The table check that kept every toggle unconditional now lets the
ligatures toggle, and only it, carry a capability, and requires that it
carry `ligatures`; every other setting's rule is as it was.
The gui keeps the setting beside its text caches, which were resolved under
it: when the core's value changes, the per-codepoint cells (which record
whether a cell is shaped) and the shaped words are dropped, and the frame the
toggle asked for draws every cell again. The atlas keeps its glyphs: plain
ones draw either way, and a ligature's strip is reused when it comes back.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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The GUI's ligature tests shape `->` and `==` with Maple Mono NF, the only
ligature font in assets/, but the font was ignored, so a checkout without a
private copy skipped the tests or ran them without their Maple half, and
passed. The font is SIL OFL 1.1, whose licence is already tracked beside it,
so it is committed and the tests now fail when it is missing instead of
quietly passing.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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the way out
SDL allocated with libc malloc. runNative now installs the shared C heap over
the gui's gpa with SDL_SetMemoryFunctions before SDL's first call: SDL frees
with whichever functions are current, so none of its memory may predate
them. SDL allocates from its own threads too, and the gpa is thread-safe in
every build (a DebugAllocator in Debug, libc's malloc in release).
That put SDL in a Debug build's leak report, and the report filled up: 1769
blocks at exit, because runNative never released its GPU objects, its window
or SDL itself. The process was about to exit, but a report that long hides
any leak that matters. runNative now releases every pipeline, texture,
sampler and buffer the Gui holds, closes the gamepad, destroys the GPU device
and the window, and calls SDL_Quit, all through defers. Eight 32-byte blocks
are left, and they are SDL's: 3.4.4's VULKAN_INTERNAL_DestroyCommandPool
never frees two arrays per command buffer (buffersUsedInPendingTransfers and
texturesUsedInPendingTransfers), which SDL's main branch now frees. They go
away with the next SDL; a comment at the SDL_Quit says so.
The frame-cost harness and a software-present run (PARDES_SOFT_PRESENT) both
run and exit cleanly in Debug.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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C's malloc, calloc, realloc and free over a Zig allocator were written three
times: syntax.zig's for tree-sitter, pdf.zig's for MuPDF, and gui.zig's for
FreeType and HarfBuzz. They are now one, src/c_heap.zig's Heap. Each hook
names the allocator variable its heap reads; gui.zig exports its heap under
the ui_malloc names font.c and HarfBuzz call. It is a module of its own
because pdf.zig is the MuPDF module, and a file cannot belong to that module
and the core's at once.
A block starts with a 16-byte header holding its size and the allocator that
made it, so it goes back where it came from even after the heap is repointed,
as the fonts' copy did. The fonts' copy carried the 16-byte Allocator itself
in a 32-byte header; here the header holds the allocator's index in a table of
every allocator a heap has used (entries are published once and never change,
and a heap remembers where its current one was last found). The difference is
measurable: with the 32-byte header, pardes-pdf-bench's filtered page render
at 96 dpi took 1.1% longer than before this change, slower in 15 of 16 pinned
rounds in two separate runs, and highlighting all of src/pardes.zig (305k
tree-sitter blocks) up to 0.6% longer, against an A/A pair within 0.7%. With
the 16-byte header both are back within the A/A pair's noise.
Two other things change. For tree-sitter and MuPDF, a block made before the
allocator was repointed now goes back to the one that made it rather than
through the current one. For the fonts, realloc(block, 0) now frees and
returns null, as glibc's does and as the other two copies already did;
neither FreeType nor HarfBuzz asks for it. The heap's test replaces the
tests of the old copies.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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first
A message fell in on t*t, an ease-in: it hung near its start for the first
frames and was still moving at its fastest when it hit the row, a sixth of a
row in its last frame. It now decelerates into place with an ease-out cubic,
slide = -(1-t)^3: a quarter of the way in the first frame, and the last
frames only settle it. There is no overshoot. At a row's height and the
dozen frames of the 180 ms fall, a follow-through is a pixel or two, which
reads as a jitter rather than a bounce. MessageFall keeps its 180 ms: the
ease-out puts the chip where it is going within about 100 ms.
The colour leads the motion: alpha = 1 - (1 - min(1, 2t))^2, whole by half
way, so what lands is already legible. The SDL shell used to show the chip
solid while it slid and fade it only on the way out; it now fades it up with
the same alpha, and the rule under a chip carries the chip's fade (a new
TagLayer.fade) instead of standing solid while the chip comes or goes.
The dissolve was an ease-out, (1-t)^2: it lost a tenth of its colour in the
first frame and spent its last frames nearly invisible. An exit eases in
instead, alpha = 1 - t^2 over the same 300 ms: it lets go gently and leaves
faster and faster. t is now counted to the last frame, so that frame shows
it gone rather than it blinking out from 0.3%. 1 - t^3 was the other
candidate; in captures it held the chip nearly untouched for half the
dissolve after the linger had already held it, then dropped a sixth of its
colour a frame, which reads as a pop. It stays in place: the lines stacked
around it do not move, and a drift would read as it leaving its row.
The test pins the shapes: a fast first step into the row, never past it,
solid by half way; a dissolve whose first drop is smaller than its last and
which ends at exactly nothing.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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Del takes a side: `Del k` gives the closed pane's rows to the nearest
expanded pane above it, `Del j` to the one below, each falling back to the
other side when it has none. DelAbove and DelBelow are those two lines, with
no path of their own under SPC.
A bare Del started from a key -- SPC d, Enter on the tag word, a row run from
an output buffer -- on a pane with expanded panes both above and below asks
instead of guessing. The question is a prompt like Save's or a search's
(Pane.Prompt.del_side), so it is painted on the pane's notice band by the
same path, and the next key answers it before any mode sees it: k or Up,
j or Down, anything else keeps the pane, as does a click. Only a key press
sets Pardes.can_ask, so a click, a 9P ctl or event write, a startup line, a
restore and a shell exiting all close the pane at once, the rows going
where layout.absorbVWeight has always sent them. A collapsed pane is not
asked about (it has only a tag row to give), and collapsed neighbours are
passed over (layout.expandedNeighbor, which Collapse now uses too).
removePane and absorbVWeight take the recipient; every other caller passes
null. Three scripts that closed a middle pane with SPC d answer k, which
is where the rows went before, and their goldens are unchanged. delask.snap
covers the question, Esc, j, a clicked DelBelow and a clicked Del.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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A notice chip -- Msg output, an older message, the leader chord, a prompt --
is a piece of tagline hung over the body's top rows, but in the SDL shell it
ended in a bare edge while the tagline above it ends in a rule. It now has
the tagline's rule along its bottom: the chrome border colour, one pixel,
running on to the window edge when the chip does. A chip still falling into
place brings its rule with it, cut at its row's top like the chip.
The macOS shell already rules every non-workspace tag layer, notices
included; a terminal draws no rule under its tagline, so its chips get none
either.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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shows it
The column grip worked in the GUI but showed nothing anyone could see.
Driving the real SDL window with pixel mouse events, press, drag and
release all reach the core and reorder or resize the column; the feedback
is what failed. The grip kept its muted color while held, and a reorder's
insertion rail was drawn in the gutter cell at the destination edge. The
GUI paints that cell as the column's scroll rail, and at the window's left
edge, the common case of moving the right column first, the dashes were
lost in it. From the leftmost column, a drag short of a neighbour's middle
shows no rail, rightly, since nothing would move, but nothing said the
grip was even held.
A held grip now lights in column_box, the accent its muted color is mixed
from, and the rail takes that color. The rail runs in the seam cell left of
where the column's rule will land, where a border drag's rail runs, for a
reorder and a left-edge move alike; at the window's left edge, which has no
seam, it runs just past the scroll rail, leaving column 0's grip and pane
boxes whole. A carried column's pointer aims at a place, not a word, so the
column tags no longer light the word under it, and a release snaps the
layout as a border drag's does rather than animating it. The preview and the release both
ask layout.columnDrop where the column goes, so the rail stands where the
release puts the edge, and the drag no longer carries its unused column
index.
The GUI test feed takes ESC]777;mouse;<down|up|motion>;<button>;<x>;<y> in
window pixels and dispatches it as an SDL event. test/column_grip.py uses
it to drive the grip through the same pixel-to-cell and tag hit path as a
hand on the mouse, and checks the grip, the rail and the result against
GPU captures and the 9P grid.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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FreeType and HarfBuzz allocated with libc malloc, out of sight of the Zig
allocator the rest of the gui uses, so its Debug leak report and a test's
std.testing.allocator never saw them. Now every allocation the font code
makes goes through ui_malloc, ui_calloc, ui_realloc and ui_free, exported
from gui.zig over `font_allocator`:
- HarfBuzz is compiled with hb_malloc_impl and friends pointing at them.
- Each UIFont gives its FreeType library its own memory manager
(FT_New_Library with an FT_MemoryRec_ over the same functions, then
FT_Add_Default_Modules and FT_Set_Default_Properties: exactly what
FT_Init_FreeType does over its malloc manager), torn down with
FT_Done_Library.
- The shim's own UIFont and scratch arrays use them too.
C's free and realloc pass no size, so a block starts with a 32-byte header
(the caller's pointer stays 16-byte, max_align_t, aligned) holding its size
and the allocator that made it, so a block goes back where it came from
even after font_allocator is repointed. runNative points font_allocator at
the gui's gpa. HarfBuzz makes a few process-wide objects on first use and
never frees them (the default Unicode functions, the locale's language,
hb-ft's font functions); ui_font_prime makes them from the default heap
before that, so a Debug build's leak report stays about fonts. Tests do the
same: the shaping tests, and a new test that creates, rasterizes and shapes
fonts under std.testing.allocator, report any leak. Only the render thread
calls into fonts, and every allocator used is thread-safe.
It costs nothing measurable: against the previous change, 10 interleaved
rounds with an A/A pair show every scenario as fast or faster with Adwaita
Mono and Maple Mono alike, and first paint over 30 launches each matches
main.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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their cells
The SDL shell rasterized every cell by its own codepoint, so a font's `->`,
`!=` or `<=` ligature never appeared. Text is now shaped with HarfBuzz 11.0.0,
built from source like FreeType: a lazy build.zig.zon dependency (the tarball
Ghostty pins) compiled only for the gui shell, its FreeType integration
linked against the freetype package, so the binary carries no system
HarfBuzz or FreeType and a tty build never compiles it.
Shaping turns on only the font's ligature features (liga, calt, clig, rlig,
rclt); composition, local forms and fractions stay off, so a cell draws either
its nominal glyph, as it always did, or part of a ligature. A glyph no lookup
of those features covers cannot change, so its cell is resolved alone, and
that resolution is cached by codepoint: in a font without ligatures (Adwaita
Mono) no cell is ever shaped, and the pipeline draws pixel for pixel as
before.
A cell whose glyph a ligature could replace is shaped with its word: the
cells between spaces that share a decoration and a role. A word ends either
side of the cursor, block or bar, so the cell being edited shows its own
character (Ghostty's rule), and inside f|i, f|l and s|t, whose typographic
ligatures do not belong on a grid (Ghostty again). Colours never end a word:
a ligature spans a syntax colour change or a selection edge. A codepoint the
primary font lacks shapes in the fallback face that has it. Taglines are not
shaped: they are drawn at two pitches, and a strip would not line up in one.
HarfBuzz only chooses glyphs; the grid places them. A substituted glyph whose
ink reaches over neighbouring cells that draw nothing of their own (the
spacer glyphs of Fira Code-style fonts such as Maple Mono, or the cells a
merged ligature cluster swallowed) claims them: it is rasterized once as a
strip that many cells wide, and each cell samples its own slice, so
selection, the cursor and per-cell colours work unchanged. Anything the grid
cannot place (several glyphs in one cell, a positioned mark) keeps its
nominal glyphs.
A frame must not pay for this. A shaped word's atlas slots are cached by its
text (checked against the stored text, not just its hash), so a frame costs
one lookup per word and a compare for the rest of the word being walked.
The atlas is keyed by (face, glyph, role, decoration, lead, span), packed into
64 bits so a lookup hashes one word; ASCII glyph ids are a table, and a
face's HarfBuzz state is made when it is first asked about a glyph. Measured
with the latency trace, whose F line now also carries the submit time (CPU =
submit - present entry), in 10 interleaved rounds against main with an A/A
pair, at 160x50 cells: with Adwaita Mono every scenario (idle, scrolling,
typing, terminal output) is as fast or 1-3% faster, and the first frame and
time to first paint are unchanged. With Maple Mono, ligatures cost the first
frame about 0.8 ms (HarfBuzz setup and shaping the screen) and scrolling new
text about 1-2%.
With it the codepoint raster path is gone: grips look up their glyph and
stay centered, since a grip is not text. ui_font_scale_for_height, an
identity kept as a "size token", is removed (px is the size everywhere),
ui_font_has_glyph becomes ui_font_glyph, and the space slot is simply the
first, cleared cell of the atlas rather than a rasterized space. CellStyle.ul
gets an explicit u3 tag so a decoration fits in the packed keys.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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stb_truetype sources
Bold in the SDL shell was a smear of the finished glyph: every pixel took
the larger of itself and three quarters of its left neighbour. That added a
grey fringe on the right of each stem instead of a thicker stem, so bold read
as blurred regular text, and at large sizes it barely read as bold at all.
The rasterizer now does what Ghostty's FreeType face does: it loads the
hinted glyph, thickens the outline with FT_Outline_Embolden, and renders
that. The stems widen as one shape with hinted edges, and the advance is
untouched, so the cell grid, caret and selection do not move. The strength
is Ghostty's heuristic, 1/32 of the line height rounded up (one pixel at a
32 px line). A bitmap strike has no outline; it is widened by one whole
pixel with FT_Bitmap_Embolden, the classic overstrike. Underline and
strikethrough are still drawn into the cached cell mask (decorateLine).
vendor/stb (stb_truetype.h and its implementation unit) was left over from
the rasterizer FreeType replaced; nothing built or referenced it.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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resize columns from their grip
Every tag band (workspace, column, pane) is centred in its row, so text sits
at one baseline offset. Anchors are inset from the column rule by that same
margin, so they are square and the band frames them on the left, top and bottom;
the pane mark moves to stay centred. When the window is not a whole number of
cells, the bands, rules, spines and scroll thumbs at the right and bottom edges
run on through the leftover pixels.
A column grip dropped short of another column's place now moves the column's
left edge, with a dashed rail preview, sharing setColumnPairWidth with the
border drag. A release still on the grip changes nothing, and a pair too
narrow for two MINW columns is left alone.
PARDES_TEST_PAD adds leftover pixels to a test-mode window and capture.
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messages
PDF highlights (hover preview, search, selection) are baked into page rasters,
and any change re-rendered the whole page with MuPDF; the TTY then re-sent it
as base64 (4.7 MB a page), the GUI as a new texture. Worse, a pointer motion
over a PDF invalidated the page even when no preview was shown, so every
motion paid that. Now:
- A raster whose baked highlight set equals the wanted one is left alone.
- A highlighted page keeps its clean rows (before highlights and tint); a
change repaints only the rows of quads that differ, running MuPDF's
highlight pass (pardes_pdf_paint_highlights) over those clean rows and
tinting them: the operations a full render performs, so the pixels are
identical. MuPDF band renders are NOT bit-identical to a whole page (edge
rows, resampled images), so they are never used to patch; the comment
claiming otherwise is corrected.
- ImagePlace.patch hands shells the changed rows; the GUI uploads just those
rows into the texture it holds.
- The TTY probes kitty shared memory (t=s) with an id vaxis never reaches and
sends rasters as a /dev/shm name when the terminal reads it; direct base64
otherwise (ssh).
- Shells that take row patches (GUI, TTY with shm) repaint a selection while
it is dragged instead of only on release.
Latency elsewhere:
- TTY: an animating frame no longer sleeps 16 ms blind; a tick thread posts
into the input queue, so input inside the frame is handled at once.
- TTY and GUI: queued pointer motions coalesce to the last.
- GUI: a skipped swapchain image re-arms the frame (3 retries); animations
still tick while nothing presents.
- Editing: the line index is carried across an edit instead of rebuilt from
a scan of the whole file per keystroke.
Messages fall into their row (ease-in; the GUI slides the band out from under
the tagline, a terminal fades it), stay until the next input as before, linger
MessageLinger ms (default 800), and dissolve (ease-out). MessageAnimation
toggles it; both are settings, in Config and startup files. The snapshot
harness pins the old behaviour. The detached server now ticks animations.
A restored terminal comes back live: the old screen and scrollback (dumped
as clean VT by ghostty's formatter, replayed at the new size; older dumps
fall back to their rendered text), a dim
"restored history" marker, then a new shell in the directory it was in.
Right-click on a line number in a file pane looks at that line (a sticky
context header's number included).
Measured with an external pty driver (TTY), an in-process fence trace
(GUI, PARDES_TEST_LATENCY), and test/pdf_pointer_bench.zig (pixel identity
against the baseline and a whole-page oracle); balanced A/A/B rounds, paired
per-round statistics.
Messages stack: each event gets its own row and its own fall, linger and
dissolve; a line keeps its row until it leaves and a new one fills the first
free row. Announcements and statuses are replaced in place, not stacked.
MessageFall, MessageDissolve and DumpDir are settings Config reports.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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The editor's loop was the only thing that could answer a 9P request, which
made the editor's own syscalls through a mount of its own tree -- a Look at
/mnt/9p/pardes/<me>/anything under a `9ns --mntgen` view, a Save into it --
requests only the blocked loop could serve. The name-based refusal that
followed (ownMountSuffix) and the in-process routing of a mount of oneself
(Client.sameSession) were patches over that, and both are gone, with the
mailbox that shipped every request to the editor's thread.
One rule replaces them, `pardes.turn`: the core is single-threaded, the
editor's thread has the turn by default and gives it up in two kinds of gap
-- while it waits for input and while a step of it is out in a host syscall
-- and a cloud9 connection task takes it in those gaps to answer. `out`
counts the steps that are out, from any thread: while one is, the core reads
consistently but that step still holds pointers into it, so a request that
would change a pane (a write, a truncation, an rmdir) is parked in the
engine and retried when the turn is next given up with nothing out, and the
editor's own wake waits for the count to reach zero. It is never a write of
its own that a step waits on out there -- writes come from a shell
performing a save between steps -- so a parked request is never the
syscall's own, and making a pane or rendering a screen need not park:
every yield sits before its step's mutation, so the layout and the surface
are whole under it. A changing request that queued effects is answered
once the editor has performed them (`echo Save > exec` returns with the
file written, as acme's `put` does), and it settles the way a step does,
because without that a /log reader waited for the user's next keystroke.
Every host syscall on a user path has to give the turn up, not fs.zig's
alone: the first end-to-end run hung in `inotify_add_watch` performing the
new pane's watch effect. PDFs and images are read whole at open, so no
draw goes out into the host. The core's allocator takes its fixed buffer
through the lock-free interface, since a connection task allocates while
the editor's thread is out in a syscall that allocates too. A Restore puts
the replacement in first and releases every task waiting on the old core.
cloud9 (pinned at eb1a104) parks an open, a truncating wstat, a clunk and a
remove on `again`, not only reads and writes, and answers a parked job
whose fid was clunked without asking the backend.
Verified: test/selfmount.py runs the editor under `9ns --mntgen` and
Looks at, reads and Saves its own tree through the mount; a unit test pins
that a change parks while the editor is out mid-step and lands when it
rests, while a read is answered in the window. 9P over the Unix socket
against a tty session, same machine, Debug builds: a read of /index 278us
-> 61us, a truncating body write 1184us -> 609us, exec Save 718us -> 583us;
the gesture benchmark is unchanged (geometric mean 0.997 over 53 cells).
Also from the reviews: a notice chip over an image or PDF pane was painted
out by the picture drawn after the cells, so pictures give up the rows; in
the GUI a tree-sitter context band painted over the chip, so body layers
are emitted first; a message is one row of printable text, its 256-byte
cut never leaves half a glyph, and one wider than its pane keeps its tail
(the file name, the reason) rather than its head.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
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