Paths these features keep in the document go through the same resolver as
linked smart objects (relative to the document's folder; other computers,
devices and URLs refused):
- A Displace smart filter's `mapPath` and a Color Lookup smart filter's LUT
`file`, re-read on every re-render: a path that is not followed leaves
the pixels as they are, as for a missing map or LUT.
- Apply Data Set's Pixel Replacement images.
- Reload Frame of a video layer's footage.
Apply Data Set and Reload Frame say why a path is not followed.
Save As PSD/PSB, layered TIFF and Package as PSD read a linked smart
object's file to embed it. The path is resolved with the same resolver as
other linked-file reads, against the document's own file (the new
ExportOptions::document_path / PsdExportOptions::document_path, set by the
engine's saves and the app's Save As). A link that is not followed is
written as pixels with a warning that says why, as for a missing file.
Nested smart-object documents resolve against the same document.
A linked smart object's path comes from the document. Every place that
follows it now goes through one resolver (photocraft_io::doc_path, built on
craft-docpath): a relative path is taken from the document's folder, and
only local files or files on the share the document itself is on are
opened. Paths to other computers, device paths and URLs are treated like a
missing file: the layer keeps its last rendering.
- Link watch: such links are not stamped, and no background look starts
when no link of the document is followed.
- Update Modified Content and other re-renders read only followed files;
the error names why a link is not followed.
- Package lists such links as missing instead of copying them.
- Reveal in Finder for a linked layer shows only a followed file; the
document's own Reveal is unchanged. The macOS invocation ends options
with `--`, and Explorer is not asked to select a path containing a comma
or a quotation mark.
- Place Linked stores a relative path as an absolute one.
The document path travels to smart-object renders in a thread-local scope
entered by Session::edit, command dispatch and background jobs.
Co-authored-by: David Mann <daaavid.mann@gmail.com>