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This is a second attempt to merge #107269. Currently I've fixed two of the issues: 1. Fixed horizontal scrollview by using a switch statement to consider vertical/horizontal case. 2. Fixed issue of `paintExtent` not being the right extent for painting. Rather using a `scrollExtent` for the main axis length of the decoration box and painting it offsetted by the `scrollOffset`. 3. If the sliver child has inifinite scrollExtent, then we only draw the decoration down to the bottom of the `cacheExtent`. The developer is expected to ensure that the border does not creep up above the cache area. This PR includes a test that checks that the correct rectangle is drawn at a certain scrollOffset for both the horizontal and vertical case which should be sufficient for checking that `SliverDecoration` works properly now. Fixes https://github.com/flutter/flutter/issues/107498. |
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| .. | ||
| decorated_sliver.0.dart | ||
| sliver_constrained_cross_axis.0.dart | ||
| sliver_cross_axis_group.0.dart | ||
| sliver_main_axis_group.0.dart | ||
| sliver_opacity.1.dart | ||