Trentin Davide
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af6814e2b8
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feat(chart): v0.5.0 architecture + interaction
Ships v0.5.0 via kmp-manager 6-phase flow. 13 plan tasks (D1, T1-T10, D3, D4),
14 agent calls, 6 P-groups. 107 → 207 tests on iosSimulatorArm64.
Toolchain (D1):
- Kotlin 2.1.0 → 2.3.21
- Compose-Multiplatform 1.8.0 → 1.11.0
- Android Gradle Plugin 8.7.3 → 9.2.0
- Gradle 8.11.1 → 9.5.1
- coroutines 1.9.0 → 1.11.0, kotlin-test → 2.3.21
- Drop kotlinx-datetime; use stdlib kotlin.time.Clock
- Drop iosX64 target (Compose-MP 1.11.0 has no ios_x64 variant)
Architecture (T1-T6, T10):
- TieredBuffer.snapshotWindow: bisect-based windowed snapshot
- New lod/ package: LodStrategy interface + MinMax/Lttb/MinMaxLttb impls
(MinMaxLttb SOTA per arXiv 2305.00332, 1.80× faster than pure LTTB)
- New render/SignalRenderer: public interface + LineSignalRenderer object
- New render/AxisFormatter: 4 default impls (Time, Decimal, DateTime, Unit)
- HARD BREAK: deleted LodMode, LodDecimator, ChartConfig.targetFps
- ChartConfig split: DataConfig + AxisConfig + RenderConfig + FrameRate sealed
- @Immutable/@Stable on all public types (0 unstable)
- RealtimeChartState.clear() API
Interaction layer (T7):
- New interaction/ package
- ChartInteractionState + rememberChartInteractionState()
- ViewportMode sealed: Following / Frozen / History(anchorMs)
- Pinch zoom + drag pan + tap crosshair gestures
- Swipe-to-edge resumes Following
- InverseProjection: pixel → ms + bisect nearest-sample
Perf finishing (T8, T9, D3):
- LineSignalRenderer Stroke cache, AxisRenderer TextStyle cache
- resolveYRange Pair<Float,Float> → FloatArray out-param
- RealtimeChartState.signalsArray cached (invalidated on add/remove only)
- LTTB upper-bound aligned to half-open [start, start+windowMs) semantic
Correctness (D4):
- NumberFormat.formatFixed Long overflow guard @ |v|≥1e19
ABI baseline regenerated:
- chart-realtime.api: 161 → 428 LOC
- chart-realtime.klib.api: 211 → 501 LOC
Modules touched: chart-realtime (lib), app (consumer), gradle (toolchain),
.paul (state).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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2026-05-22 00:05:43 +02:00 |
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Trentin Davide
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0e3b79e2da
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feat(chart): v0.4.0 portfolio hardening
Ship 15-task plan via kmp-manager group-by-group flow. Library moves
from "prototype" to "senior-engineer-built KMP library" per 3-reviewer
audit (android-reviewer + mobile-performance-reviewer + mobile-architect).
Critical fixes:
- LICENSE MIT (T1) — legal blocker resolved
- explicitApi() Strict + BCV 0.16.3 + klib enabled (T2) — ABI locked
baseline: chart-realtime.api 161 LOC + chart-realtime.klib.api 211 LOC
- Internal lockdown: CircularBuffer, TieredBuffer, LodDecimator,
dataVersion, rememberFrameTick (T3)
- kotlinx-datetime 0.6.2 replaces expect/actual currentTimeMs (T4)
Platform.kt + .android.kt + .ios.kt deleted
- CircularBuffer.writeIndex Int -> Long (T5) — fix 124d overflow @ 200Hz
- Remove !! and @Suppress("UNUSED_EXPRESSION") from commonMain (T6)
- Remove dead config: maxBufferSeconds, xLabelDecimals,
SignalConfig.label (T7)
Correctness:
- POSITIVE_INFINITY/Float.MAX_VALUE sentinels -> hasData flag (T8)
- Snapshot.withMutableSnapshot + SnapshotApplyConflictException retry
in push/addSignal/removeSignal (T9)
- dataVersion mutableLongStateOf — Compose-observable, idle = 0
recompositions (T10) — RenderLoop.kt deleted, targetFps @Deprecated
- Single buffer.snapshot() per signal per frame via SignalEntry
per-signal scratch arrays (T11) — render-time snapshot cost halved
- M4 binning Tier1/Tier2: firstTs/V + minTs/V + maxTs/V + lastTs/V
with chronological dedup (T12) — no C7 vertical spike artifacts.
TIER1/TIER2 CAPACITY x2 -> x4 (TOTAL 77.4k -> 94.8k)
- NaN/Inf/backward-timestamp guards on push (T13) — silent drop,
per-signal lastPushedTs tracking, KDoc contract
Test gap fill:
- NumberFormat extracted from AxisRenderer to internal object (T14)
+38 tests pinning rounding/scientific/time-format behavior
- TieredBufferTest +15 tests: tier roll, window-crossing, clear,
edge cases (T15)
- LodDecimatorTest +10 LTTB-specific branch coverage tests (T15)
Test count: 33 -> 107 (+74).
ABI: 211/272 -> 161/211 LOC (locked, baseline committed).
Deferred to v0.5.0:
- Bump kotlinx-datetime 0.6.2 -> 0.7.x (needs Kotlin 2.1.20+)
- Remove ChartConfig.targetFps (currently @Deprecated, ignored)
- NumberFormat Long overflow @ 1e19 (safe via current routing)
- LTTB upper-bound inclusive vs snapshot half-open semantic mismatch
- Macrobench setup for -30% frame-time verification
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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2026-05-21 16:27:15 +02:00 |
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dtrentin
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b9ee5ddfa3
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Initial commit: chart-realtime KMP library v0.4.1-SNAPSHOT
- RealtimeChart composable with Canvas-based rendering
- TieredBuffer: 3-tier ring buffer (5min full-rate, 10min @10Hz, 45min @1Hz) for 1h data support with ~5MB footprint
- LodDecimator: MEAN / MIN_MAX / MIN_MAX(default) / LTTB render-time decimation
- AxisRenderer: X/Y axis with INSIDE/BESIDE/HIDDEN label modes, T0-relative timestamps, scientific notation
- SignalRenderer: clipRect-bounded path rendering with LoD
- ChartTheme: Material3-compatible dynamic theming (light/dark)
- package: dev.dtrentin.chart
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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2026-05-21 01:48:51 +02:00 |
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