Center filtered Waterfall columns

Ariver

2026-06-11 3d8d37306e39db5c8eb41fafd95a13112d573f62

 C1.source/Sources/Aligner/QuickSwitchRootView.swift

@@ -1668,6 +1668,11 @@
            return
        }

        if waterfallShouldKeepFilteredColumnsCentered {
            ensureWaterfallCardVisibleVertically(selection)
            return
        }

        switch horizontalIntent {
        case .reveal:
            ensureWaterfallColumnVisible(column)
@@ -1751,6 +1756,10 @@
    }

    private var waterfallAlignmentScrollRange: ClosedRange<CGFloat> {
        if waterfallShouldKeepFilteredColumnsCentered {
            return 0...0
        }

        var minimumOffset: CGFloat = 0
        var maximumOffset = waterfallMaxScrollOffset

@@ -1775,6 +1784,10 @@
    private func clampedWaterfallAlignmentOffset(_ offset: CGFloat) -> CGFloat {
        let range = waterfallAlignmentScrollRange
        return min(max(range.lowerBound, offset), range.upperBound)
    }

    private var waterfallShouldKeepFilteredColumnsCentered: Bool {
        currentViewModel?.lockedSpaceID != nil && waterfallMaxScrollOffset <= 0.5
    }

    private func setWaterfallScrollOffset(_ offset: CGFloat, animated: Bool) {
@@ -3019,9 +3032,9 @@
        }

        let columnWidth = waterfallColumnWidth()
        let totalWidth = WaterfallMetrics.contentHorizontalPadding * 2
            + CGFloat(waterfallColumns.count) * columnWidth
        let columnsWidth = CGFloat(waterfallColumns.count) * columnWidth
            + CGFloat(max(0, waterfallColumns.count - 1)) * WaterfallMetrics.gap
        let totalWidth = WaterfallMetrics.contentHorizontalPadding * 2 + columnsWidth
        waterfallContentWidth = max(waterfallLayer.bounds.width, totalWidth)
        waterfallScrollOffset = clampedWaterfallAlignmentOffset(waterfallScrollOffset)
        waterfallContentLayer.frame = CGRect(
@@ -3031,7 +3044,7 @@
            height: waterfallLayer.bounds.height
        )

        var x = WaterfallMetrics.contentHorizontalPadding
        var x = waterfallColumnStartX(columnsWidth: columnsWidth)
        for column in waterfallColumns {
            column.containerLayer.frame = CGRect(
                x: x,
@@ -3044,6 +3057,15 @@
        }
    }

    private func waterfallColumnStartX(columnsWidth: CGFloat) -> CGFloat {
        guard currentViewModel?.lockedSpaceID != nil else {
            return WaterfallMetrics.contentHorizontalPadding
        }

        let centeredStart = (waterfallContentWidth - columnsWidth) / 2
        return max(WaterfallMetrics.contentHorizontalPadding, centeredStart)
    }

    private func layoutWaterfallColumn(_ column: WaterfallColumnLayers) {
        let bounds = column.containerLayer.bounds
        let isSpaceFocused = spaceFocusWindowCount(for: column.column.appGroupIndex) > 0