bors-servo c8d9aad3e3 Auto merge of #28880 - wusyong:fix-footer, r=delan ...

Fix absolute descendents being replaced when retreiving root

<!-- Please describe your changes on the following line: -->
The cause of #16410 is because calling `try_get_layout_root` will replace its `abs_descendants` even itself isn't absolute positioned. So I pushed them instead if the root isn't absolute. Also add a few docs and comments to help understand how block size of absolute flow is being calculated.

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #16410 (GitHub issue number if applicable)

<!-- Either: -->
- [x] There are tests for these changes:
Reduced testcase from the issue.
```html
<style>
  html {
    min-height: 100%;
    position: relative;
  }
  div {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 25px;
    border: 1px solid black;
  }
</style>
<div>
</div>
```

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<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->

2023-01-18 08:18:39 +01:00

..

display_list

Fix some typos

2022-12-17 03:22:34 +01:00

tests

Adjust size test for debug/release differences.

2021-02-26 04:20:23 -05:00

block.rs

Actually check if root is absolute positioned

2022-04-19 17:43:43 +08:00

Cargo.toml

chore(deps): bump smallvec from 0.6 to 1.9 in all local packages

2022-10-10 03:03:22 +09:00

construct.rs

Miscellaneous build / tidy fixes.

2021-02-26 17:53:55 +01:00

context.rs

Move most animation processing to script

2020-05-12 10:22:14 +02:00

data.rs

Replace OpaqueStyleAndLayoutData by StyleAndOpaqueLayoutData

2020-04-06 23:06:13 +02:00

flex.rs

Servo build fixes.

2019-12-16 14:23:56 +01:00

floats.rs

Update nightly rustc.

2021-11-01 08:46:18 -04:00

flow_list.rs

Some further removals

2019-05-30 20:27:19 +02:00

flow_ref.rs

Update MPL license to https (part 4)

2018-11-19 14:47:27 +01:00

flow.rs

Actually check if root is absolute positioned

2022-04-19 17:43:43 +08:00

fragment.rs

Fix some typos

2022-12-17 03:22:34 +01:00

generated_content.rs

Fix Servo build and unify display representation.

2019-08-15 17:11:08 +02:00

incremental.rs

Remove LayoutDamageComputation

2019-01-14 16:10:26 +01:00

inline.rs

layout: Don't built stacking contexts or display lists for empty blocks.

2020-06-09 11:27:23 -04:00

layout_debug.rs

Fix deprecation warnings

2019-01-28 11:32:40 +01:00

lib.rs

Move most animation processing to script

2020-05-12 10:22:14 +02:00

linked_list.rs

Update MPL license to https (part 4)

2018-11-19 14:47:27 +01:00

list_item.rs

Update euclid.

2019-07-23 23:09:55 +02:00

model.rs

Servo build fixes.

2019-12-16 14:23:56 +01:00

multicol.rs

Add trace logs when assigning inline/block sizes

2022-04-17 16:18:32 +08:00

opaque_node.rs

Update MPL license to https (part 4)

2018-11-19 14:47:27 +01:00

parallel.rs

Update rayon to dedupe crossbeam-epoch

2019-07-12 21:01:33 +02:00

persistent_list.rs

Update MPL license to https (part 4)

2018-11-19 14:47:27 +01:00

query.rs

Update nightly rustc.

2021-11-01 08:46:18 -04:00

sequential.rs

Fix some typos

2022-12-17 03:22:34 +01:00

table_caption.rs

Add trace logs when assigning inline/block sizes

2022-04-17 16:18:32 +08:00

table_cell.rs

Add trace logs when assigning inline/block sizes

2022-04-17 16:18:32 +08:00

table_colgroup.rs

Servo build fixes.

2019-12-16 14:23:56 +01:00

table_row.rs

style: Miscellaneous Servo build fixes.

2020-02-12 02:43:23 +01:00

table_rowgroup.rs

Add trace logs when assigning inline/block sizes

2022-04-17 16:18:32 +08:00

table_wrapper.rs

Add trace logs when assigning inline/block sizes

2022-04-17 16:18:32 +08:00

table.rs

Add trace logs when assigning inline/block sizes

2022-04-17 16:18:32 +08:00

text.rs

Revert "Revert "Update font-kit and freetype and unicode-script.""

2020-08-10 13:30:51 -04:00

traversal.rs

Fix some typos

2022-12-17 03:22:34 +01:00

wrapper.rs

Implement concept of dirty root

2020-05-19 16:26:36 +02:00