refactor(cdk/drag-drop): move sorting and positioning logic into a separate class #25044
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This is an internal reorganization of the drop list to make it easier to eventually add support for mixed orientation. Includes:
DropListRef
and into a separate class. The existing logic is very specific to our approach that moves items around usingtransform
. The future mixed orientation will likely move the DOM nodes themselves which would've been difficult to manage if we kept the positioning logic withinDropListRef
.dom
directory in order to reduce clutter in the root of the package.