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The purpose of this new object will be to keep track of various states during an ongoing layout. Until now, we've been updating layout tree nodes as we go during layout, which adds an invisible layer of implicit serialization to the whole layout system. My idea with FormattingState is that running layout will produce a result entirely contained within the FormattingState object. At the end of layout, it can then be applied to the layout tree, or simply queried for some metrics we were trying to determine. When doing subtree layouts to determine intrinsic sizes, we will eventually be able to clone the current FormattingState, and run the subtree layout in isolation, opening up opportunities for parallelism. This first patch doesn't go very far though, it merely adds the object as a skeleton class, and makes sure the root BFC has one. :^) |
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| DynamicLoader | ||
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| CMakeLists.txt | ||