Every non-final system of a multi-system region now stretches its horizontal
slack so its ink fills the content width, instead of sitting at its natural
left-aligned width. ENGRAVER_VERSION 7 → 8 (any wrapping score's baked geometry
differs; a single-system score is unchanged — its only system is ragged-right).
Casting bakes each system by a Placement: a vertical dy plus a horizontal affine
world_x = a·x + b (rigid = a:1, b:dx). A justified system spreads the slack
linearly (a = 1 + extra/span). The map is CLAMPED to the slot-source range: affine
within it, rigid slope-1 beyond it (bearing overhangs, staff lines drawn to the
ink edge), so the mapped ink extremes agree exactly with the per-slot deltas and
the ink spans exactly [left_margin, left_margin + content_width] (no over/under-
shoot). Slot-relative like the E1 remap: glyphs translate by the map at their
SLOT's source (intra-slot offsets survive), spanning strokes map endpoints through
the affine (they stretch), rigid-width strokes (stems/ledgers, via owning_glyph)
track their slot, slur control points map through the affine.
Not justified: a region's last system (ragged-right by convention), a degenerate
span, or a system already at/over width (never compressed into overlap).
Quality consequences (honest): system_break_penalty collapses to ~0 (the point);
the width-uniformity axes rise as the full non-final system contrasts with the
ragged last line (ten-measure casting_off ~0.45 → ~0.80) — a metric-semantics
follow-up noted in DECISIONS. Tests retargeted: the widow rebalance now shows in
measure distribution not baked widths; the floor-column test moved to a synthetic
vector (robust to fixture values). Goldens regenerated (view_box widens to the
content width; same 147 primitives, no collisions). 939 tests, clippy 0, docs
-D warnings, conformance 8/8.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The third pipeline primitive kind, review-hardened (5 verified findings fixed
pre-commit). A `Curve` (four control points, mirroring `Stroke`) threads
through all three IR stages, the canonical-encode fingerprint (a 5th u32 count
prefix; width-lock 4→5), the round-trip provenance chains and count identity,
`to_render`, the stub solver, engrave remap + casting, SVG path emission, and
hit-testing.
Slurs draw as one cubic bézier per slur carrying the slur's exact provenance
(no synthesis). LayoutContent::Slur resolves each endpoint event to a Note
column at to_logical (SlurEndpoint At/Unresolved — E1's honest-placement
discipline); a symmetric arc whose apex sits `height` from the endpoint line;
curvature_override direction+height honored, style.line (dashed) deferred to
Push 3. Honest non-drawing (traced anchor kept) for an unresolved endpoint, a
non-left-to-right span, or a cross-staff slur (no single staff — would float
at yo=0). Authored height/thickness sanitized to defaults when non-positive
(a negative thickness would else fail validation and blank the layout).
Hit-test: HitShape::Curve (Copy) flattens the cubic to a 16-segment capsule
inside contains/intersects (one region per curve); a slur click resolves to
Slur generically (no editor arm; edit ops refuse it). render-svg: stroked
unfilled <path C> after strokes/before glyphs + curve_count + content-hull
bounds. engrave: HorizontalRemap::curves; casting curve_system = Rigid-to-
start-system (no de Casteljau split — deferred; break-spanning slur draws
whole in its start system, kept for the source surjection); ENGRAVER_VERSION
4→5; slur_shape_penalty now 0.0 by construction (Minimal draws the ideal arc).
Existing SVG goldens changed only in the provenance-note comment (curves now
enumerated) — geometry byte-identical; 6 snapshots gained curve_count; new
ten_measure_with_slurs goldens. 929 tests, conformance 8/8.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The first repeat-structure ink, review-hardened (19 verified findings fixed
pre-commit). Zero golden churn for repeat-free scores; four new goldens for
the ten_measure_with_repeats fixture.
layout-ir: repeats project LayoutContent::Repeat resolved at to_logical
(RepeatPlacement::At/RegionEnd/Unresolved — honest, no origin fallback;
zero-offsets judged by value; bare wall-clock boundaries draw no ink); deps
now from anchor_sites(). Constrained: coinciding measure barlines morph into
precomposed repeatLeft/Right/RightLeft (name-only, exact provenance kept);
standalone signs synthesize under a semantic (site, staff) instance key;
end repeats at the region close draw repeatDots beside a final barline (or
the full sign on continuing staves); start marks there draw nothing;
end-facing signs reserve their left reach via column overhang; time
signatures clear morphed signs; volta brackets = 3 strokes above the top
staff + timeSig digit numerals, kind-independent.
engrave: ENGRAVER_VERSION 3 -> 4; casting classifies barline columns via
is_barline_glyph AND direct Measure source, so standalone signs are never
phantom break candidates or measure records; criterion-6 round-trip covers
the repeat fixture.
render-svg: repeatLeft/Right/RightLeft/Dots outlines + metrics + font subset
regenerated from the SHA-pinned Bravura (fontTools 4.63.0); GlyphClass::Repeat.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Levi Neuwirth