M10: a booklet's both sides follow a driver that keeps its own two-sided setting (#5772) (#5903)

* M10: a booklet's both sides follow a driver that keeps its own two-sided setting (#5772)

Booklet ▸ Both sides always asked for two-sided printing on the short
edge (#2707). A driver that doesn't take two-sided settings from other
programs (no two-sided printing, manual two-sided only in its
Properties, Microsoft Print to PDF) then made craft-print refuse the
whole job. The reporter's Epson ET-2870 offers only OneSided, and its
manual two-sided setting is what prints their normal two-sided jobs.

print::booklet_job_duplex asks such a driver for nothing on both
sides, so its own setting applies, as for ordinary printing (#2422)
and as Acrobat enables two-sided for a booklet only "if available".
Unknown support still asks for the short edge; one side on its own
stays one-sided. The Print dialog takes the chosen printer's support
from the printer list (PrintDraft::printer_two_sided, also behind its
"its own setting applies" note), and doc_print reads it only for a
booklet's both sides.

The dialog's booklet test used the machine's printers, and on Windows
the default, Microsoft Print to PDF, now gives the other answer: it
sets its own printers and checks the note too.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M10: doc_print's lookup of a booklet printer's two-sided support is tested (#5772)

The booklet test fed job_duplex the printer's answer directly, so a
lookup that missed the default printer or matched the wrong one would
have gone unnoticed. The search over the printer list is now its own
function, two_sided_in, tested with a list of named, default and
unknown printers.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M10: a booklet printed to "default" goes to the printer whose driver was asked (#5772)

doc_print decides a booklet's both sides from the printer's two-sided
support. For "default", the job named no printer, so the spooler picked
whichever printer was the default when the job was submitted, after the
document was rendered. The printer found in the list is now the job's
printer, by name, and the lookup test covers a one-sided default.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* #5903: the booklet test lists its printers through a stand-in source

It set the dialog's printer list by hand while the real list was still loading. On a machine with
no printers (CI's Linux runner) the list that arrived replaced them and reset the printer, so the
dialog the test clicked through was not the one it set up. The printers now come from the
dialog's own source, drivers unasked as #3554 lists them, with each driver's two-sided answer in
the map.

---------

Co-authored-by: austin62jake <340374338+austin62jake@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: FredApps <153173854+FredApps@users.noreply.github.com>

parity/acrobat-features.toml

@@ -8309,8 +8309,8 @@ milestone = "M10"
 status = "shipped"
 commands = ["print.dialog"]
 tools = ["doc_print"]
-evidence = ["crates/print/src/tests.rs::booklets_pair_pages_for_folding", "crates/ui-egui/tests/it/print.rs::a_booklet_decides_two_sided_itself", "crates/automation/src/printing.rs::a_booklet_decides_two_sided_itself", "crates/print/src/tests.rs::a_booklet_prints_both_sides_on_the_short_edge", "crates/print/src/tests.rs::booklet_creep_moves_inner_sheets_toward_the_fold"]
-notes = "both/front/back, left/right binding; a booklet decides two-sided itself, as Acrobat does (its Print dialog hides Two-sided while Booklet is chosen; Using Acrobat X Pro: Acrobat automatically enables duplex printing for booklet printing): both sides flip on the short edge, front or back only prints one-sided, and the Two-sided choice is kept for the other layouts (#2707); creep compensation (points per sheet, default 0) moves each sheet's pages toward the fold by their sheet's place from the outside, clipped at the fold (#6777); the amount is entered, not worked out from the paper's thickness"
+evidence = ["crates/print/src/tests.rs::booklets_pair_pages_for_folding", "crates/ui-egui/tests/it/print.rs::a_booklet_decides_two_sided_itself", "crates/automation/src/printing.rs::a_booklet_decides_two_sided_itself", "crates/print/src/tests.rs::a_booklet_prints_both_sides_on_the_short_edge", "crates/print/src/tests.rs::booklet_creep_moves_inner_sheets_toward_the_fold", "crates/print/src/tests.rs::a_booklet_leaves_two_sided_to_a_driver_that_keeps_its_own", "crates/ui-egui/src/workflows/print_ui.rs::a_booklet_leaves_two_sided_to_a_driver_that_keeps_its_own"]
+notes = "both/front/back, left/right binding; a booklet decides two-sided itself, as Acrobat does (its Print dialog hides Two-sided while Booklet is chosen; Using Acrobat X Pro: Acrobat automatically enables duplex printing for booklet printing): both sides flip on the short edge (as Acrobat, \"if available\": a printer whose driver doesn't take two-sided settings, such as one with only manual two-sided in its Properties or Microsoft Print to PDF, is asked for nothing, so its own setting applies rather than the job being refused, #5772), front or back only prints one-sided, and the Two-sided choice is kept for the other layouts (#2707). Not yet: a guided manual two-sided pass (front, turn the stack, back) on such a printer; creep compensation (points per sheet, default 0) moves each sheet's pages toward the fold by their sheet's place from the outside, clipped at the fold (#6777); the amount is entered, not worked out from the paper's thickness"
 
 [[feature]]
 id = "print.poster"