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There are currently five places that scroll offsets are stored: - DOM: A set of scroll offsets used for script. - Layout: An array of scroll offsets that is used for tracking layout-side scroll offsets. - Layout: The scroll offsets stored in the `ScrollTree`. These are currently unset and unused. - Compositor: The scroll offsets stored in the `ScrollTree` mirrored from layout. - WebRender: The scrolled offsets stored in the WebRender spatial tree. This change is the first step in combining the first three into the layout `ScrollTree`. It eliminates the extra array of scroll offsets stored in layout in favor of the storing them in the `ScrollTree`. A followup change will eliminate the ones stored in the DOM. - In addition the `ScrollState` data structure is eliminated as these are now stored in a `HashMap` everywhere when passing them via IPC. - The offsests stored in layout can now never scroll past the boundaries of the scrolled content. Testing: This should not change behavior and is thus covered by existing WPT tests. Signed-off-by: Martin Robinson <mrobinson@igalia.com> Co-authored-by: stevennovaryo <steven.novaryo@gmail.com> |
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| tests | ||
| Cargo.toml | ||
| display_list.rs | ||
| lib.rs | ||
| rendering_context.rs | ||
| viewport_description.rs | ||