Port PeachPDF's CSS Fragmentation engine for real page-break support - #263

Open

jhaygood86 wants to merge 42 commits into

ArthurHub:masterfrom

jhaygood86:feature/fragmentation-engine-parity

Commits on Aug 29, 2026

Wire the CSS Fragmentation vocabulary CssEngine already parses
jhaygood86
committed
be7559f
Add the immutable fragment record types (Fragments/)
jhaygood86
committed
1fb4cd1
Add the fragmentation classification and break-token types
jhaygood86
committed
925e0ae
Produce a trivial single-fragmentainer FragmentTree after layout
jhaygood86
committed
3eb352b
Add a minimal FragmentPainter that paints from the fragment tree
jhaygood86
committed
fe70643
Add block-level page-break corrections (D2)
jhaygood86
committed
13092c7
Bucket the fragment tree into one fragmentainer per page
jhaygood86
committed
7a9499e
Add inline-flow page-break corrections: real widows/orphans (D3)
jhaygood86
committed
1ba0f33
Add table fragmentation: row-level avoidance and repeated <thead> (D4)
jhaygood86
committed
9869c0e
Cut PdfGenerator over to page-per-fragmentainer rendering (F1)
jhaygood86
committed
83e568d
Make FragmentPainter the default paint path for WinForms/WPF (F2)
jhaygood86
committed
51a3b62
Remove the crude per-word/per-box BreakPage nudge (F3, partial)
jhaygood86
committed
46b1b6f
Add real per-type fragment content painters (image/hr/frame/marker)
jhaygood86
committed
b3b4507
Fix multi-page PDF text/image invisibility, delete CssBox.Paint/PaintImp
jhaygood86
committed
e7da595
R0: paint text from the fragment tree, not live CssRect geometry
jhaygood86
committed
3ac00ec
R1: real resumable pass loop for forced page breaks
jhaygood86
committed
068b57c
R3: break-inside:avoid/monolithic relocation via real relayout (R2 folded in)
jhaygood86
committed
4d5ae58
R4: real keep-with-next, fixing a genuine pre-existing gap
jhaygood86
committed
9f086b8
R5/R6: neither needed new resumption machinery - fixed real bugs instead
jhaygood86
committed
86d624c
Fix R1 regression: forced breaks nested inside table cells corrupted layout
jhaygood86
committed
8bfdd9a
R7: table content already benefits from R1-R6 fixes; one known limitation documented
jhaygood86
committed
991af5b
R9: keep-with-next across a real pass boundary already works; no rewind needed
jhaygood86
committed
dc57a7c
Fix catastrophic layout corruption when a keep-with-next run exceeds one page
jhaygood86
committed
17766fb
R10: delete dead break-token/relaxation scaffolding never wired up
jhaygood86
committed
9bd7663
Fix orphans never enforced on a paragraph's first page-fragment
jhaygood86
committed
7b6f874
Fix rowspan cells silently skipped by the table's break-inside:avoid row-shift
jhaygood86
committed
4f7ffcd
Fix container-left-behind: a moved box's ancestor now follows it up
jhaygood86
committed
2015821
Document that list markers survive container relocation without help
jhaygood86
committed
3dff788
Preserve table rows unfragmented by default, per css-tables-3 6.1
jhaygood86
committed
362dee9
Repeat position:fixed content on every page, per css-position-3
jhaygood86
committed
d5826e4
Fix CI page-count tests fragile to font substitution on non-Windows
jhaygood86
committed
1be6c4f
Fix PaintHarness after rebase: paint from the fragment tree, not deleted CssBox.Paint
jhaygood86
committed
059afcb
Port PeachPDF's pure-logic fragmentation unit tests (Batch 1)
jhaygood86
committed
5fbc4e0
Port PeachPDF's core forced-break/keep-with-next/orphans-widows tests (Batch 2)
jhaygood86
committed
d8b2587
Port PeachPDF's fragment-claiming, marker and paint tests (Batch 3)
jhaygood86
committed
11c35b3
Port PeachPDF's table fragmentation tests (Batch 4)
jhaygood86
committed
ea99b55
Port PeachPDF's PDF-pipeline end-to-end tests (Batch 5, final)
jhaygood86
committed
42fff5b
Fix InlineFragmentation's widows/orphans merge-back to shift, not just merge
jhaygood86
committed
6c67f40
Retire Orphans_RejectsZero: not a real gap, fix the test's own premise instead
jhaygood86
committed
267c3e0
Fix RelocateIfNeeded off-by-one: a box exactly one page tall can be moved
jhaygood86
committed
dbe33fe
Preserve a box's own top margin at a forced page break
jhaygood86
committed
416ea3d
Update a table's own Location when row-atomicity shifts its first row
jhaygood86
committed
d710fff