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* Print: list driverless CUPS destinations, not only permanent queues The Print dialog's printer list came from `lpstat -p -d`, which lists only permanent queues. A driverless IPP printer discovered on the network — the standard setup on modern Linux desktops — has no permanent queue: only `lpstat -e` (CUPS >= 1.7) names it, and CUPS builds a temporary queue when `lp` sends it a job. Until now such printers were invisible and the dialog showed only Save as PDF. Enumerate `lpstat -e` alongside `lpstat -p -d` and merge the answers: queues first, deduplicated, default still from `-d`; a spooler without `-e` keeps today's behaviour and loses only the driverless names. The .deb/.rpm now recommend cups-client so a machine without a print stack is not silently printerless. Fixes #652 Co-authored-by: ZCode (GLM-5.3) <noreply@z.ai> * Print: fix the off-unix build and a driverless default's marker `lpstat_e_command` is called only from `printers`' unix block, so off unix it was dead code and CI's Windows clippy gate (`-D warnings`) failed to build the crate. Gate it like its caller. The default destination can itself be driverless — `lpoptions -d` names a destination no queue exists for — and the merge appended it from `lpstat -e` with `default: false`, so the dialog preselected the first queue instead of the user's default. The `-d` default now marks the appended entry too; the test covers it, and CRLF in `-e` output. Co-authored-by: ZCode (GLM-5.3) <noreply@z.ai> --------- Co-authored-by: ZCode (GLM-5.3) <noreply@z.ai> Co-authored-by: Brandon Thomas <echelon@gmail.com>
pdfcraft-print
Layer L4: printing (execution plan M10.5).
let pages = select_pages(count, Some("1-3, ii, 9-"), &labels, Subset::All, false)?;
let settings = Settings { pages, paper: PAPERS[0].1, layout: Layout::multiple(4), ..Default::default() };
let sheets = layout(&display_sizes, &settings)?; // geometry only (previews)
let pdf = impose(&doc, &settings)?; // the print-ready PDF
spool::submit(&pdf, &spool::Job { printer: None, copies: 2, ..Default::default() })?;
- Size: fit (to the sheet minus an 18 pt margin), actual size, shrink oversized, custom %; centred; auto orientation turns the sheet for landscape pages.
- Multiple: 2/4/6/9/16 (or any n) pages per sheet, horizontal/vertical (reversed) order, page borders, auto-rotation of pages that don't match the cell.
- Cut and stack (Multiple's page order): consecutive pages in each cell's pile,
with aligned cut marks in the gutters. For example, 10 pages at 4 per sheet give
[1, 4, 7, 10],[2, 5, 8, blank],[3, 6, 9, blank]. Print single-sided, keep sheets in output order, cut at the marks, then stack the cell piles from left to right, top to bottom. Blank cells can be discarded. Page ranges and Reverse pages are applied before imposition. Duplex imposition is not supported. Headless:doc_printwithlayout: "multiple",order: "cut-stack"andper_sheet: 4(or any supported grid size), pluspathorprinter. - Booklet: saddle-stitch imposition padded to a multiple of 4; both sides, front or back only; left or right binding.
- Poster: tile scale, overlap shared by neighbouring tiles, cut marks.
- Comments & forms: document, + markups, + stamps, or form fields only; annotations print only with their Print flag, drawn from their appearance streams (Algorithm 8.1).
Each source page becomes a Form XObject (its content wrapped in q/Q, plus the printable annotations); sheets place them with a clip. The result is a fresh, unencrypted, garbage-collected file (callers check the print permission).
spool talks to CUPS: printers come from lpstat -p -d (the queues) and lpstat -e (driverless
destinations no queue exists for; CUPS builds a temporary one when the job arrives), jobs go to
lp with copies, collation, duplex and monochrome options. The job is piped to lp on stdin and
never written to a temp file, where another local user could read or swap it. Other platforms
report that printing to a printer isn't available yet; the print-ready PDF can always be saved.
Not yet: Windows and web spoolers, print as image, poster labels, PostScript output, colour conversion for grayscale.