Measured 2026-09-22 by scripts/smoke_settings_com.py --build-dwt against the
running AutoCAD 2026 (25.1s), each on a scratch Documents.Add() document:
1. RPC_E_CALL_REJECTED (-2147418111) on Documents.Count straight after
Documents.Open, after Close(False) inside document_close, and in
_ensure_document_state: AutoCAD's own message filter refuses incoming
calls while it is still switching documents. pywin32 exposes no
CoRegisterMessageFilter, so _wait_out_rejected_call waits the window out
for read-only callables (0.25 s -> 1 s pauses, 20 s budget, inside
COM_CALL_TIMEOUT) at those sites and after Documents.Add/Open; any other
com_error is not retried.
2. layer_list raised "'IAcadLayer' object has no attribute 'Color'. Did you
mean: 'color'?": acax25enu.tlb spells IAcadEntity/IAcadLayer `color` and
`Lineweight`. Late-bound dispatch resolved .Color/.LineWeight
case-insensitively; with a makepy cache present (this machine's gen_py was
regenerated on 2026-09-17, and every object a method returns is then a
generated wrapper) the lookup is exact. All 17 sites now use the typelib
spelling, which works on both wrappers; the fakes model the measured names.
3. layer_state_restore raised "'IAcadObject' object has no attribute
'Count'": Dictionaries.Item and IAcadDictionary.Item are declared
IAcadObject* (the narrowing _com_unnarrow already handles for MLEADER
styles). The save path went through the typed Dictionaries.Add, so only
the reopen paths failed. Both now un-narrow; the fakes narrow like pywin32.
4. The Freeze put on layer 0 raises 'Invalid layer' whatever the value, even
False while thawed (color/Linetype/Lineweight/Plottable/LayerOn/Lock/
ActiveLayer all fine on it), so a state saved with 0 current restored with
two warnings and 0 unapplied. Freeze is written only when it changes the
layer.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
Four review findings, all measured by the reviewer on AutoCAD 2026:
1. ucs_list and the ucs_restore('world') CMDACTIVE guard read
app.GetVariable, but GetVariable is an AcadDocument member — the tool
was dead live and the guard's swallowed read forced cmd_active to 0,
sending `_.UCS _W` into any open prompt. Both read the document now,
and a failed CMDACTIVE read refuses instead of proceeding. The fake
app in tests/test_views_ucs.py has no GetVariable any more, so the
old code cannot pass.
2. view_named_save defaulted from doc.ActiveViewport.Center/Height/Width,
which does not track the display (it answered the initial view after
`_.ZOOM _C 5,6 20`). The current view is VIEWCTR / VIEWSIZE at the
SCREENSIZE aspect — what `-VIEW _S` records (width 40.267 for height
20). The fake viewport is deliberately stale so a read of it fails.
3. view_named_restore wrote Center/Height/Width into the AcadViewport;
AutoCAD anchors the lower-left corner and widens to the display
aspect, landing a 10x20 view at (5, 6) on VIEWCTR (20.134, 6). It now
zooms the saved rectangle (app.ZoomWindow), which centres and fits
like `-VIEW _R` (VIEWCTR = saved centre, VIEWSIZE = max(h, w/aspect)),
reports `applied: "zoom_window"` and reads VIEWCTR / VIEWSIZE back.
Headless the same reconciliation moved the centre whenever the
*Active VPORT's aspect was rewritten from w/h (even the 1.34 default
opened at x = 11.734): the aspect the file carries is left alone —
it is the display's, written by AutoCAD at save — and the window is
fitted into it; the payload adds `vport_height` / `aspect_ratio`.
4. layer_state_restore set ActiveLayer before the loop and outside the
try; AutoCAD refuses to make a frozen layer current, so the spec's
own save → freeze → restore path raised an opaque COM error with
nothing applied. When `frozen` is being restored the state's current
layer is thawed first; the write is wrapped and a refusal lands in
`warnings`. The fake document and layer now model both refusals.
Live AutoCAD was not running in this round (GetActiveObject failed, no
acad process), so the fix is measured against the reviewer's numbers,
not re-measured.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
Layer states are ACADMCP_LAYERSTATES XRECORD chunks (<= 255 ASCII chars each),
in the file and not in AutoCAD's Layer States Manager. Headless view restore
writes the *Active VPORT (ezdxf's header has no $VIEWCTR; measured). UCS is
stored and made current; tool coordinates stay WCS.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd
