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CHANGES - Common Print Dialog Backends - CUPS Backend - v2.0b6 - 2024-06-18

CHANGES IN V2.0b6 (18th June 2024)

  • Stream print data through a Unix domain socket To ease making a Snap from the CPDB backend for CUPS we now transfer the print job data from the dialog to the backend via a Unix domain socket and not by dropping the data into a file (PR #28).

  • Let the frontend not be a D-Bus service, only the backends To control hiding temporary or remote printers in the backend's printer list we have added methods to the D-Bus service provided by the backends now. Before, the frontends were also D-Bus services just to send signals to the backends for controling the filtering (PR #29).

  • Unified logging. Always use log...() functions (PR #29).

  • Updated names of some CUPS constants to CUPS 2.5.x and newer (PR #28).

  • Removed the backend functions for get-all-jobs(), get_active_jobs_count(), and cancel_job() (PR #28).

  • Removed tryPPD(), a useless, PPD-related function This function logs the options in the PPD of the CUPS queue but does nothing else. PPDs will also go away in CUPS 3.x, so we want the CUPS backend not depend on PPDs or PPD-supporting functions/libraries (PR #29).

  • send_printer_state_changed_signal(): Send correct signal Send CPDB_SIGNAL_PRINTER_STATE_CHANGED, not CPDB_SIGNAL_PRINTER_REMOVED (#29).

  • Let "dialog_name" always be "const char *", to eliminate warnings (PR #29).

  • Added NULL checks for the functions dealing with dialogs

  • Build test: Give more time (3 instead of 1 sec) for the print job submission before closing the backend, to get note of the confirmation of successful submission (PR #28).

  • Build test: Let CPDB frontend and backend log in debug mode (PR #28).

  • Build test: Create the directory for the socket files (PR #28).

  • Updated build test for removal of backend info file

CHANGES IN V2.0b5 (2nd August 2023)

  • Remove CPDB backend info file The frontend libraries now use only the D-Bus to find available backends. This makes sure that everything works also if the frontend and/or any of the backends are installed via sanboxed packaging (like Snap for example) where the components cannot read each other's file systems (PR #26).

  • get_all_media(): Do not crash on custom page size range entries The media-col-database IPP attribute contains one entry for each valid combination of page size dimensions, margins, and in some cases also media source and media type. Entries for custom page sizes contain ranges instead of single values. get_all_media() crashed on these. Now we let the function simply skip them.

  • Build system: Removed unnecessary lines in tools/Makefile.am Removed the TESTdir and TEST_SCRIPTS entries in tools/Makefile.am. They are not needed and let make install try to install run-tests.sh in the source directory, where it already is, causing an error.

CHANGES IN V2.0b4 (21th March 2023)

  • Added test script for make test/make check

    The script src/run-tests.sh starts a private session D-Bus via dbus-run-session and therein an own copy of CUPS. It uses the CPDB CUPS backend with this CUPS and tests it using the cpdb-text-frontend of cpdb-libs, performing several test tasks on the backend.

CHANGES IN V2.0b3 (20th February 2023)

  • Add handler for GetAllTranslations method and Bug fixes (PR #22)
    • Fixed bug when backend finds zero printers
    • Add handler for GetAllTranslations method
    • get_printer_translations() fetches translations for all printer strings.
    • Removed get_human_readable_option_name() and get_human_readable_choice_name() functions.

CHANGES IN V2.0b2 (13th February 2023)

  • Return printer list upon activation and subscribe to cups for updates (PR #20)

    • Return printer list synchronously upon activation
    • Subscribe to CUPS notifications for printer updates
    • Automatically update frontends about new printers found, old printers lost, or printer state changed

  • Added the support of cpdb-libs for translations

    • Using general message string catalogs from CUPS and also message string catalogs from individual print queues/IPP printers.
    • Message catalog management done by libcupsfilters 2.x, via the cfCatalog...() API functions (catalog.h).

  • Option group support

  • Added billing-info option (PR #19)

  • Log messages handled by frontend

  • Use pkg-config variables instead of hardcoded paths (PR #17)

  • Build system: Let "make dist" also create .tar.bz2 and .tar.xz

CHANGES IN V2.0b1 (12th December 2022)

  • Added function to query for human readable names of options/choices

    With the added functionality of cpdb-libs to poll human-readable names for options/attributes and their choices this commit adds a simple function to provide human-readable strings for the user-settable printer IPP attributes of CUPS queues.

  • Added support for common CUPS/cups-filters options

    Options like number-up, page-set, output-order, ... Available for all CUPS queues, not specific to particular printer.

  • Added get_media_size() function

  • Support for media sizes to have multiple margin variants (like standard and borderless)

  • Do not send media-col attribute to frontend as user-settable option

  • Adapted to renamed API functions and data types of cpdb-libs 2.x

  • Updated signal names to match those emitted from CPDB frontend

  • Made "make dist" generate a complete source tarball

  • Fixed some potential crasher bugs following warnings about incompatible pointer types.

  • Updated README.md

    • On update the old version of the backend needs to get killed
    • Common Print Dialog -> Common Print Dialog Backends
    • Requires cpdb-libs 2.0.0 or newer
    • Updated instructions for running the backend.
    • Added link to Gaurav Guleria's GSoC work, minor fixes
    • Use third person.