Layout API

Wijjit’s layout engine converts template tags into positioned elements. The modules below govern size specifications, stacking behaviour, frames, scrolling, and dirty-region tracking.

Size & geometry

`wijjit.layout.bounds.Bounds`	Represents the position and size of a UI element.
`wijjit.layout.bounds.Size`	Represents a size specification for layout calculation.
`wijjit.layout.bounds.parse_size`	Parse a size value into a Size object.
`wijjit.layout.bounds.parse_margin`	Parse a margin value into a normalized 4-tuple.

Engine primitives

`wijjit.layout.engine.LayoutNode`	Base class for layout tree nodes.
`wijjit.layout.engine.ElementNode`	Layout node wrapping a single Element.
`wijjit.layout.engine.Container`	Base container class for layout nodes with children.
`wijjit.layout.engine.VStack`	Vertical stacking container.
`wijjit.layout.engine.HStack`	Horizontal stacking container.
`wijjit.layout.engine.SizeConstraints`	Size constraints for layout calculation.

Frames & scrolling

`wijjit.layout.frames.Frame`	Renders a frame with borders and content.
`wijjit.layout.frames.FrameStyle`	Style configuration for a frame.
`wijjit.layout.frames.BorderStyle`	Border style for frames.
`wijjit.layout.scroll.ScrollManager`	Manages scroll state and operations for a scrollable container.
`wijjit.layout.scroll.render_vertical_scrollbar`	Render a vertical scrollbar as a list of characters.

Dirty tracking

wijjit.layout.dirty.DirtyRegionManager

Manages dirty regions for optimized screen rendering.