Module cotis_traits 

Cotis trait implementations wiring CotisLayoutManager into the standard frame and element configuration API.

Default integration path

When using ElementConfig from cotis-defaults, this module provides everything needed out of the box:

• LayoutManagerCompatible — installs the renderer’s text measurer and viewport size.
• LayoutManager / LayoutFrameManager — begin_frame → CotisLayoutRun → end.
• ConfigureElements — open/set/close elements on CotisLayoutRun<ElementConfig<…>>.
• ConfigureLeafElements with TextElementConfig — text leaf expansion.
• CotisLayoutCompatible and TextConfigurable for both Sizing and DoubleAxisSizing style parameterizations.
• From<&CotisStyle> → LayoutElementConfig — style conversion (always sets internal ChildWrapping::None).

Text layout

ConfigureLeafElements::set_leaf_config on a text leaf expands the string into synthetic child nodes:

• Lines split on \n, laid out top-to-bottom.
• Each line becomes an LTR row with internal ChildWrapping::Text.
• TextElementConfigWrapMode::Words creates word and spacer children with TextDrawPayload.
• Newline / None wrap modes keep one fragment per line.

Custom config types must implement CotisLayoutCompatible and TextConfigurable to support text leaves.

Element state queries

See secondary_traits for debugging and hit-testing hooks on the post-frame cache.

Modules

secondary_traits

Element-state query trait implementations on CotisLayoutManager.