Review of the drop-open and autosave commits surfaced one blocker and
five majors; all are fixed here, and two claims in the autosave commit
message are corrected by this one: tab close does NOT clear a snapshot
(matches native .sv$ semantics — saving, restoring, discarding, exit,
and the capped boot scan do), and serialization runs on the main
thread between awaits, not off the paint path.
- The restore prompt can no longer appear with no entries (empty
"Recover Drawing" modal on every boot once the autosave dir exists).
- Restore no longer consumes the snapshot before the open succeeds:
the recovered drawing goes through the guarded drop queue, and the
snapshot is deleted only after the tab opens; cancel or parse
failure keeps the only copy.
- Saving during an autosave round defers its snapshot cleanup until
the round finishes, so a stale round can no longer resurrect a
snapshot newer than the save.
- The boot scan no longer deletes snapshots by mtime comparison
(re-opening a drawing refreshes the recent copy's mtime, which
silently destroyed wanted snapshots); GC is now a 16-entry cap with
oldest-first eviction.
- OPFS write failures abort the writable stream (a leaked lock could
stall the same-key writer and disable autosave for the session), and
DOMException errors now carry their name/message.
- Empty (crash-window) snapshots are never offered; an unreadable one
warns and stays discardable instead of looping forever.
- Drop-open polish: reads start inside the handler and complete in
drop order (legacy WebKit safety, deterministic multi-file order),
dragenter is canceled too, the install guard only latches on
success, non-drawing drops don't steal propagation, a lock-poison
panic can't cross into JS, and re-dropping an open drawing no
longer risks clobbering an in-flight open (it re-queues).
- The model-space sheet floor is per-axis (a thin 8x400 mm profile
keeps its length) and centers content on the enlarged page.
(cherry picked from commit 3edbc5b7c8)
The web build had no autosave: on_autosave was a no-op and the
subscription was native-only. Both gates are gone; every savetime tick
now serializes each dirty tab (same pre-serialize sync as the web save
path, no thumbnail, serialized serially off the critical paint path)
into a dedicated opencadstudio-autosave OPFS directory, keyed by
drawing name, without touching the dirty flag, downloads, or recents.
On boot the web app scans that directory and offers any snapshot
newer than the last saved copy in a localized Recover Drawing modal
(Restore opens it as "name (recovered).dwg" through the standard
open pipeline; Discard removes it; Escape discards). Saving or
closing a drawing clears its snapshot; the boot scan also garbage-
collects stale entries. run_web now requests navigator.storage.persist
so settings and OPFS data survive browser eviction.
(cherry picked from commit 101d167ebc)
Afonsop