A rollback reverts the local data with a rebase, which is not a commit,
so the parts of the workspace that follow commits missed it:
- Comment pins moved in the reverted action stayed where they were, on
screen and on the server, and pins on a board the rollback removed
kept pointing to it. They go back to the reverted position, and pins
on a removed board move to the page root.
- Focus mode stayed on with no shape left when the rollback removed the
focused ones, and the next shape drawn turned it on again. It ends
when its last shape goes, and the selection drops removed shapes.
- Component thumbnails kept the rejected look. The thumbnails of the
reverted mains are rendered and uploaded again, and an upload whose
shapes changed during the render is skipped.
- Under WASM, an open text editor reset to the reverted content but the
canvas kept the old layout. It is laid out again.
- A library sync whose save failed showed no update notice again once
the release undid it. The notice is checked again after that
rollback.
Before it repairs a damaged file, the backend keeps a copy of it as a
system snapshot, and the repair notice points to the version history to
find it. The History panel listed that copy among the autosaves, so it
could not be told apart.
The History panel lists the copies kept before a repair as their own
entry per day, "Before automatic repair, <date>", above that day's
autosaves, and the preview of such a copy uses the same label.
The notice of a rejected save always said the same thing. It did not
name the file when the user had moved to another one, gave no hint when
the page held data that was already invalid, and replaced the notice of
a backend repair still on screen, since the store holds one toast.
The backend flags a rejection whose first commit touches pages or
components that failed validation before it (:preexisting-damage). The
rejection notice names a file other than the open one, says when the
data was damaged before, and folds into a repair notice still on
screen; a later repair notice folds a rejection notice in the same way.
The notice says that the latest changes were undone, no longer that the
rest of the work is saved.
The answer to a save lists the changes other sessions stored before it,
such as the backend's repair of a damaged file. When the answer came
before the message with such a change, the saved commit was
acknowledged first, and the late change was then applied on top of the
local edits instead of under them, out of the server's order.
A saved commit of the open file now stays pending until this tab has
received every change the answer lists from other sessions, so a late
change is applied under the local edits. If one does not arrive within
10 seconds, the file reloads.
When a peer restores a version, the file reloads to it. Edits made on
the replaced version stayed queued: their save failed for good and
locked the workspace, and a rollback or a rebase replayed them on the
restored data.
Loading another version forgets the queued, buffered and saved commits
made on the old one. A save of such a commit, in flight or answered, is
dropped instead of failing or being rolled back, and one save carries
the edits of one version only.
While saves fail the workspace turns read-only, but only some tools
checked it. Edits from the asset, color and token panels, and a drag or
a drawing in progress when the lock came, still made commits that
queued behind the failed save.
commit-changes refuses commits while the save-failure lock holds,
except those that are not user edits: the undo of rolled-back commits,
text position data and component touches. Undo and redo do nothing
while locked. When the lock comes, moves, resizes, rotations, drawings
and the drags of flex, guide and grid handles in progress are cancelled
and commit nothing, and the design panel shows the Inspect view.
Reloading the open file (a peer's restore, the fallback of a rollback)
runs initialize-workspace again without leaving the workspace. The
streams the first run started kept running next to the new ones, so a
commit added one undo entry per reload and each notification was
handled twice. The old subscription also sent its unsubscribe after the
new subscribe, which ended the new one on the server.
A new initialize-workspace, text reflow, shape layout or notification
subscription stops the one before it, and a subscription replaced by
one to the same file sends no unsubscribe.
The MCP plugin sends the rollbacks it saw with its next task response
and then forgets them. When that response came after the server had
given up on the task, the server dropped it and the agent never heard
about the rollback. A reload of the tab or of the plugin lost them too.
The server now sends the rollbacks of such a late response back to the
plugin, which reports them again with its next response. The plugin
keeps the rollbacks not reported yet in its local storage, one entry
per file, so a reload does not lose them. Both MCP plugin manifests ask
for the allow:localstorage permission for that.
Plugin writes failed whenever the workspace read-only flag was set. The
Inspect tab sets it too, although it only hides the editing tools, so an
MCP agent could not edit while the user was inspecting. A user who
became a viewer had the flag cleared, so plugin writes did not throw and
silently did nothing.
Writes now fail on what makes them unsafe, not on the flag: failing
saves, a user who cannot edit, a version preview or a lost render
context. The error says which one, and the MCP instructions tell the
agent which of them pass by waiting.
The backend rejects a save after the call that made the changes has
returned, and the workspace then undoes them. A plugin, or the MCP
agent, went on working with shapes that were no longer there and never
learned why.
The rollback event now names the files that lost commits and the pages
and page shapes their changes touched, and plugins get it as the new
`contentrollback` event (`ContentRollback` type) through a subscription
to the store stream, so no rollback is dropped by debouncing.
The MCP plugin keeps the rollbacks it is told about and sends them with
its next task response, failed or not. The server collects them per tool
call and puts a warning first in that tool's response, naming what was
affected; the instructions tell the agent to read the pages again and
redo what is missing.
A read-only workspace (saves failing, a user who cannot edit, a version
preview) only hid the editing tools: plugins, the MCP among them, still
changed shapes, and those edits were never saved. Every plugin write now
throws a read-only error, whatever the throwValidationErrors flag, the
same way a write to a removed shape does.
`check-permission` with a write permission runs the new `check-writable`,
which covers most writers. Writers without a permission check (most
context methods such as create*, group, align or flatten, the z-order
methods, applyTypography on a text range, removing a ruler guide) call it
themselves, and shape setters get it through `check-shape-writable`.
Reads, comments and undo blocks keep working, so a block opened before a
lock still closes.
The MCP instructions tell the agent what the read-only error means.
Closing the v2 text editor with Escape could crash the workspace. The
text options panel renders once more with the editor it saw last, after
closing has disposed it, and reading the style of a disposed editor
throws.
The panel now takes the values from the shape when the editor is gone.
- Ending a drag inside the frame the shapes already belong to sent an
empty reparent save and bumped the revision. The move commits only
when some shape changes parent.
- When a user restored a version, other sessions reloaded the file with
no notice. They now see a dialog naming who restored which version
(by its name, else its date), saying that later changes are no longer
in the file and, when they had changes not saved yet, that those were
lost.
- Exports drawn in the browser (PDF, SVG, and PNG when the WASM renderer
draws it) and duplicating a file from the dashboard started at once,
so an export could show changes a pending save then rejected, and a
copy could miss queued edits. Both wait for the file's pending saves.
A client export warns that it includes unsaved changes; a copy warns
that it misses them.
A rollback can remove or change shapes the UI still refers to.
- The selection drops shapes that are gone and the color picker that
edited them closes.
- The undo history is cut at the reverted action; it stays when no
entry holds a reverted change. Undo and redo commits carry real undo
changes and the history index they moved from, so a reverted Ctrl+Z
puts the change and the index back.
- An open path edition whose shape the rollback changed closes without
saving the editor's stale copy. The v2 text editor loads the reverted
text again; the WASM editor already showed it.
- The Alt measurements look the hovered shape up in the current data.
- Plugin setters, resize() and rotate() on a removed shape throw
"Shape not found", whatever the plugin's throwValidationErrors flag.
- A save that failed on a short platform failure (a lost or refused
database connection, lack of resources, a server shutting down, a
serialization failure or deadlock, a socket or HTTP timeout, a host
that did not resolve, an interruption) answered 500, which stops
autosave. It now answers 503, which the frontend retries. Other I/O
and database errors keep answering 500, timeouts 504.
- A save answered not-found no longer replaces the workspace with the
access page. It is a terminal save error: the workspace stays open
with the failed save notice, report and reload link. When edit rights
are lost, the notice says how many changes could not be saved.
- A library sync marked the library synced three seconds later,
whatever happened to its save. A rejected sync was undone but stayed
marked: copies stayed out of date and the "updates available" notice
never came back. The mark now waits for the save, a rollback of the
sync brings the notice back, and a failed mark (e.g. the user just
became a viewer) is logged instead of leaving the workspace.
- While saves fail the workspace is read-only. The view-mode banner
says editing is disabled because changes can't be saved, with the
Inspect banner's size and bold lead and no Done button. Users can
still switch pages, pan, zoom and inspect. The lock lifts when a save
lands and brings back the mode the user had or picked meanwhile; the
WebGL context lock keeps the workspace read-only if it lasts longer.
The lock lives in app.main.data.persistence.lock.
- A viewer is never locked. A role change that leaves the user a viewer
keeps the edits that lost permission, queued and on screen, and shows
the count notice again. The role change that brings edit rights back
releases them and rolls them back on screen, as a rejected save would.
Any other terminal failure is released by the next role change or file
opened.
The debug faults `io` (socket timeout, 503) and `eof` (500) cover both
sides of the I/O rule.
A rollback reverts whole undo groups, across files and saves, so that
no user action is left half done. Some actions still split:
- An action that commits several times inside one undo transaction
(e.g. applying a token to several shapes) gave each commit its own
group, so a rejection could revert part of it: shapes ended up linked
to a token whose value was never applied. An undo transaction now
opens with a commit group that every commit made inside it takes.
- The commit that undoes saved commits of a rejected action joined an
open transaction's group, so a later rejection there reverted the
undo too. It gets a group of its own.
- Emptying the open transaction during a rollback dropped its group, so
its later commits were no longer one unit. It keeps its group.
- Waiting for a save ended as soon as the queue emptied, while later
commits could still wait in the buffer. Waiters now also wait for an
empty buffer.
A test covers a token action of three commits in one save whose third
commit is rejected.
The update-file tests each built the same rect change and the same
change that fails while applied. The rect change moves to the test
helpers as th/add-rect-change and the failing one gets a named helper.
The test of a database failure during the retry no longer counts calls
to process-changes: it fails every attempt that leaves the failing
commit out.
update-file checked the schema of the whole file on every save, which
loads and decodes every page even when the changes touch one. On files
with several pages that was most of the time of a save.
validate-file-schema-affected! checks the file data with the pages index
reduced to the pages the changes modify; the data outside pages is still
checked whole, and a change type it does not know makes it check the
whole file. update-file uses it for the strict and the soft schema check.
A save of 10 commits on a file of 10 pages of 2k shapes goes from ~1.1 s
to ~240 ms; a single page file costs the same.
A save whose changes failed validation was rejected as a whole: autosave
stopped, the edits made after it piled up unsent, and a reload lost
them all, the valid ones included.
The frontend now sends each commit of a save as its own group with its
commit id (:changes-with-metadata). When applying and validating all of
them at once fails, the backend searches by bisection for the first
commit that fails, keeps the commits before it and answers with
:rejected (that commit and every later one). Only the kept changes are
stored, snapshotted and broadcast, so other users never see the rejected
ones. Flat :changes and groups without ids stay all-or-nothing; database
and network errors still fail the whole request. A rejection without an
error type is reported as an internal error.
The frontend rolls the file back to what the server holds: it undoes
every pending commit of that file, applies again the remote changes that
arrived meanwhile, and redoes the kept commits. Undoing only the
rejected commits would write stale values over a peer's later change to
the same attribute. The rejected and later commits leave the queue, the
buffer and the undo history, and a warning that hides after ten seconds
tells the user. The pure bookkeeping lives in
app.main.data.persistence.commits.
The pending notice of a commit the rollback dropped no longer leaves the
save status at pending, which made "Pin this version" hang and fail.
Debug tools drive these cases by hand: debug.commitInvalidChange() makes a
save fail validation, holdSaves() delays the answers, failNextSave() and
failNextRollback() fail them on purpose (backend flag debug-save-faults),
and persistenceState() shows the queue.
A remote commit undoes the pending local commits, applies the remote
changes and replays the local ones, so the local file ends like the
server will: remote first, local last. Only queued commits took part;
the ones still waiting in the persistence buffer (up to ~3s of edits)
stayed under the remote change. When both touched the same attribute,
the remote value won locally but lost on the server.
The buffer now lives in the store ([:persistence :buffer]) instead of
an rx buffer, so the rebase can reach it. A flush merges it per file
into queue entries that keep the list of commits they carry, and the
leave-page guard reads buffer and queue from the store. A buffer left
by a previous session is queued when persistence starts.
