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c01bb264c7
Adds a HomogeneousViewport class that works like MixedViewport but handles only children that have all the same height. Converts ScrollableWidgetList to use that, so that we don't waste a frame looking at the size of the contents each time we change size. This allows a number of seemingly pointless double-pumps in the tests to be removed. Other changes that were necessary to support the above: - RenderBlock now supports minExtent (think 'min-height' in CSS) - RenderBlock now supports itemExtent (forces the height of each child to be the same, so that the itemExtent passed to the fixed- height scrollables are all authoritative instead of a source of bugs when they don't match) - RenderBlockViewport now supports horizontal scrolling - improved the style of the isInfinite assert in box.dart - fixed the position of a comment in mixed_viewport.dart - added a test - made the logic for how many items to show be more precise
Sky
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For information about contributing to Sky, please see CONTRIBUTING.md.
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