IModifierCommitChanges

Base class for modifiers that render horizontal lines across text (underline, strikethrough).

Base class for modifier-authored geometry attached to final visual text ranges. It owns range accumulation, paint resolution, renderer handles and main-thread rebuild timing; subclasses only translate one immutable [[RangeDecorationContext]] into a [[RangeMeshWriter]].

Applies color to text ranges using hex codes or named colors.

Adds a 3D extrude/bevel effect by appending a stack of progressively offset duplicate quads behind the face, shaded across a near→far colour gradient.

Raises the atlas tile resolution of the glyphs in its range by up to two size classes above the font default. Grow-only and shared: the atlas key ignores tile size, so every component that shows the glyph reads one tile at the highest boost any range requested, and the tile only ever grows.

Declares semantic interaction for ranges selected by a Style source. One per-component [[UniTextInteractions]] router owns input, geometry, overlap and pointer state; this modifier owns only authored policy, target events and optional default actions.

Applies a user-authored [[Material]] to a text range by emitting a dedicated sub-mesh with its own CanvasRenderer.

Shared engine for paint layers (fill, stroke, shadow, glow, inner-shadow). Resolves a [[TextPaint]] from the parameter, precomputes gradient/texture mapping per styled range, and stamps coverage quads through [[CoverageQuadOps]]. Thin subclasses only pick a coverage mode and parse their geometry params — all paint/mapping logic lives here once.

Publishes platform-neutral meaning, spoken text, states, actions and final bounds for range entities. Native accessibility integrations consume [[For]] instead of being named or invoked by this modifier.