feat(usecase): round persisted split ratios to avoid noisy floats

1 file · +10 -1

M internal/application/usecase/manage_panes.go +10 -1


@@ -4,6 +4,7 @@ import (
4	4		"context"
5	5		"errors"
6	6		"fmt"
	7	+	"math"
7	8		"sort"
8	9
9	10		"github.com/bnema/dumber/internal/domain/entity"

@@ -298,7 +299,8 @@ func (uc *ManagePanesUseCase) SetSplitRatio(ctx context.Context, input SetSplitR
298	299		minRatio := input.MinPanePercent / 100.0
299	300		maxRatio := 1.0 - minRatio
300	301		oldRatio := splitNode.SplitRatio
301		-	splitNode.SplitRatio = clampFloat64(input.Ratio, minRatio, maxRatio)
	302	+	clamped := clampFloat64(input.Ratio, minRatio, maxRatio)
	303	+	splitNode.SplitRatio = roundSplitRatio(clamped)
302	304
303	305		log.Debug().
304	306		Str("split_node_id", input.SplitNodeID).

@@ -417,6 +419,13 @@ func findNearestSplitForAxis(node entity.PaneNode, axis resizeAxis) entity.Pan
417	419		return nil
418	420		}
419	421
	422	+	const splitRatioRoundFactor = 100.0
	423	+
	424	+	func roundSplitRatio(ratio float64) float64 {
	425	+	// Keep snapshots stable and readable; avoids persisting noisy float values.
	426	+	return math.Round(ratio*splitRatioRoundFactor) / splitRatioRoundFactor
	427	+	}
	428	+
420	429		func clampFloat64(v, minVal, maxVal float64) float64 {
421	430		if v < minVal {
422	431		return minVal

 	"context"
 	"errors"
 	"fmt"
+	"math"
 	"sort"
 	"github.com/bnema/dumber/internal/domain/entity"
 	minRatio := input.MinPanePercent / 100.0
 	maxRatio := 1.0 - minRatio
 	oldRatio := splitNode.SplitRatio
-	splitNode.SplitRatio = clampFloat64(input.Ratio, minRatio, maxRatio)
+	clamped := clampFloat64(input.Ratio, minRatio, maxRatio)
+	splitNode.SplitRatio = roundSplitRatio(clamped)
 	log.Debug().
 		Str("split_node_id", input.SplitNodeID).
 	return nil
 }
+const splitRatioRoundFactor = 100.0
+func roundSplitRatio(ratio float64) float64 {
+	// Keep snapshots stable and readable; avoids persisting noisy float values.
+	return math.Round(ratio*splitRatioRoundFactor) / splitRatioRoundFactor
+}
 func clampFloat64(v, minVal, maxVal float64) float64 {
 	if v < minVal {
 		return minVal