| [anchor-position] Implements resolving anchor-center. |
| |
| This patch implements the layout-time anchor-center logic. |
| In part based on: |
| https://chromium-review.googlesource.com/c/chromium/src/+/4919956 |
| |
| This patch: |
| 1) Pulls the alignment logic out into its own struct, and step. |
| See: ComputeAlignment() |
| 2) Adds a step for computing the anchor-center position if necessary. |
| See: ComputeAnchorCenterPosition() |
| 3) Adjusts the logic in ComputeOutOfFlowInsets() to coerce any auto |
| insets to zero if anchor-center is present. |
| 4) Adds special logic in ComputeInsetModifiedContainingBlock() to |
| coerce the available-size in a similar manner to center static |
| position. |
| |
| Fixed: 1469728 |
| Change-Id: I40cc1e697cd8f8f0759f18ba814e19321e19702b |
| Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5196073 |
| Cr-Commit-Position: refs/heads/main@{#1252779} |
