Gap 19 now states in one sentence that DesignCraft does not apply retained IDML
graphic-layer visibility to raster or PDF output, so it no longer reads as contradicting
placed-PDF layer choices, which are applied. The placed-PDF doc records that parent-page
and anchored placements get variants, and what a package's IDML copy cannot carry.
skylartaylor's review: a PDF can list readable layers yet fail the visibility
rewrite. On a synthetic 33-section xref history, object.layerOptions with
useDefaults:false and an empty hidden list was accepted (only hidden names
triggered #1670's rewrite check), the canvas could not draw the choice and
PDF export then failed.
Every explicit choice now runs one actual pdf_hide_layers rewrite per
distinct source before any item is edited or undo is recorded; this subsumes
the separate layerless check. Resetting to file defaults (useDefaults:true
or the legacy empty list) needs no variant and bypasses the check. #1670's
fail-closed canvas handling is kept alongside the explicit-override state: a
stored explicit choice (including all-on) whose source can no longer be
rewritten draws nothing rather than the unmodified source, and export errors.
The new regression test fails before this change (the all-on request is
accepted) and covers both selection orders, atomicity, undo depth, reset
bypass and the stale all-on fail-closed path.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
skylar taylor-barrick