pkg_stacker

This is a port of the java libHHUTIL.com.hh.util.stacker classes to dart.

This package constains generic stacker classes ("inslag schema's") to generate PDF-stacks.

Each stacker algorithm:

• fires enough events to assemble pagination reports, number of blocks, number of pages etc.
• is configured by a StackDescriptor and a PageDescriptor for maximum flexibility.
• has one or more configurable media sources (IMediaSource).
• and a generic target GenericMediaTarget that can be extended for your application (use pdflib to generate pdf files).

Notes

• Must supply a PdflibWrapper instance by registering it with GetIt.
• For now, see work_java for examples of GenericMediaTarget, a dart example is to be done yet.

Changelog

0.1.5 - 2026-03-24

Fixed

• Off-by-one in cut-and-stack calculations when a pre-defined set of page counts was given.
• Nested _updatePages calls should be discarded.

0.1.4 - 2026-03-23

Changed

• Version bump from 0.1.3 to 0.1.4 (test -> 1.31.0 (was 1.30.0)).

0.1.3 - 2026-02-27

Changed

• Version bump from 0.1.2 to 0.1.3 (test -> 1.30.0 (was 1.29.0)).

0.1.2 - 2026-02-17

Fixed

• doUpdateMaximumNumberOfPages popped the first supplied maximum number of pages, causing a wrong stack height when getSplitOnChunks was true.

Changed

• StackDescriptor.getMaximumNumberOfPages now returns number of fixed pages (if any) regardless of getSplitOnChunks.

0.1.1 - 2026-02-02

Changed

• Version bump from 0.1.0 to 0.1.1 (lints -> 6.1.0 (was 6.0.0)).

0.1.0 - 2026-01-21

Changed

• Made IStackDescriptor mandatory for IMediaTarget.
• Removed doAdvanceDocument and doAdvancePage calls from inside IMediaTarget. You must call these explicitly from your algorithm implementation.
• Added doUndoDocument and doUndoPage if you want to cancel empty documents or pages.

0.0.36 - 2026-01-08

Changed

• Version bump from 0.0.35 to 0.0.36 (test -> 1.29.0 (was 1.28.0)).

0.0.35 - 2025-11-21

Changed

• Version bump from 0.0.34 to 0.0.35 (test -> 1.28.0 (was 1.27.0)).

0.0.34 - 2025-11-11

Changed

• Version bump from 0.0.33 to 0.0.34 (test -> 1.27.0 (was 1.26.3)).

0.0.33 - 2025-11-04

Fixed

• Removed flutter_test and changed to test (this is not a flutter package).

Changed

• To provide more control over filename generation, pass an IMediaTarget instance to the FilenameCallback function.
• typedef FilenameCallback = String Function(int value); to typedef FilenameCallback = String Function(IMediaTarget target);.

0.0.32 - 2025-06-17

Fixed

• Bug that would lead to an odd number of pages for double-sided cut-and-stack stacks.

0.0.31 - 2025-05-22

Changed

• Version bump from 0.0.30 to 0.0.31 (lints -> 6.0.0 (was 5.1.1)).

0.0.30 - 2025-04-02

Changed

• Version bump from 0.0.29 to 0.0.30 (collection -> 1.19.1 (was 1.19.0)).

0.0.29 - 2024-12-23

Changed

• Version bump from 0.0.28 to 0.0.29 (collection -> 1.19.0 (was 1.19.1)).

0.0.28 - 2024-12-23

Changed

• Version bump from 0.0.27 to 0.0.28 (collection -> 1.19.1 (was 1.19.0)).

0.0.27 - 2024-12-23

Changed

• Version bump from 0.0.26 to 0.0.27 (lints -> 5.1.1 (was 5.1.0)).

0.0.26 - 2024-12-19

Changed

• Version bump from 0.0.25 to 0.0.26 (Support Apple silicon (arm64)).

0.0.25 - 2024-12-19

Changed

• Version bump from 0.0.24 to 0.0.25 (collection -> 1.19.0 (was 1.19.1)).

0.0.24 - 2024-12-19

Changed

• Version bump from 0.0.23 to 0.0.24 (collection -> 1.19.1 (was 1.19.0)).

0.0.23 - 2024-12-12

Changed

• Version bump from 0.0.22 to 0.0.23 (lints -> 5.1.0 (was 5.0.0)).

0.0.22 - 2024-12-12

Changed

• Version bump from 0.0.21 to 0.0.22 (collection -> 1.19.0 (was 1.18.0)).

0.0.21 - 2024-08-22

Changed

• Version bump from 0.0.20 to 0.0.21 (SDK update 3.5.1).

0.0.20 - 2024-08-12

Changed

• Removed get_it dependency.

0.0.19 - 2024-02-05

Added

• IMediaTargetBuilder::setUseCache.
• IMediaTargetBuilder::getUseCache.

0.0.18 - 2024-02-01

Changed

• Version bump from 0.0.17 to 0.0.18 (Resolve package version confusions).

0.0.17 - 2023-02-09

Changed

• Version bump from 0.0.16 to 0.0.17 (Version confusion after compiler bug chaos).

0.0.16 - 2023-01-31

Changed

• Version bump from 0.0.15 to 0.0.16.

0.0.15 - 2023-01-31

Changed

• Version bump from 0.0.14 to 0.0.15.

0.0.14 - 2022-12-27

Changed

• Version bump from 0.0.13 to 0.0.14.

0.0.13 - 2022-12-22

Changed

• Version bump from 0.0.12 to 0.0.13.

0.0.12 - 2022-12-22

Changed

• Version bump from 0.0.11 to 0.0.12 (Recompile due to installer optimizations).

0.0.11 - 2022-10-30

Fixed

• SnakeStacker could not handle double-sided pages.

0.0.10 - 2022-10-25

Changed

• Added setCount to PdfMediaSourceBuilder to provide a page count if it was already available somewhere.

0.0.9 - 2022-10-17

Changed

• Renamed OneOnOne to OneUp.

0.0.8 - 2022-10-11

Changed

• Version bump from 0.0.7 to 0.0.8 (Recompile due to wrong GetIt.instance syntax.).

0.0.7 - 2022-10-05

Changed

• Version bump from 0.0.6 to 0.0.7 (fixed pdflib searchpath macos crash).

0.0.6 - 2022-10-01

Changed

• Version bump from 0.0.5 to 0.0.6 (pkg_pdflib bundle macos dylib).

0.0.5 - 2022-09-30

Changed

• Made pure dart.

0.0.4 - 2022-09-29

Changed

• Version bump from 0.0.3 to 0.0.4 (dependencies upgraded).

0.0.3 - 2022-09-07

Changed

• Added generate_stacks_test that demonstrates a Cut-and-stack stacker of intermediate stacks.

0.0.2 - 2022-09-06

Changed

• Feature complete.

0.0.1 - 2022-08-29

Changed

• Initial version.