divider element's :style is dropped by UI.Layout.Engine, making fg/bg unusable from the DSL

[bmanturner]

Summary

Raxol.View.Components.divider/1 accepts a :style option:

# lib/raxol/view/components.ex:178-187
def divider(opts \\ []) do
  opts = if is_list(opts), do: Map.new(opts), else: opts

  %{
    type: :divider,
    style: Map.get(opts, :style, %{}),
    char: Map.get(opts, :char, "-")
  }
end

And UIRenderer.render_visible_element/3 is ready to honor it:

# lib/raxol/ui/ui_renderer.ex:270-281
defp render_visible_element(
       %{type: :divider, x: x, y: y, width: w, char: char} = element,
       _theme,
       _parent_style
     ) do
  style = Map.get(element, :style, %{})
  fg = Map.get(style, :fg, :white)
  bg = Map.get(style, :bg, :black)
  ch = String.at(char || \"-\", 0) || \"-\"

  for col <- 0..(w - 1), do: {x + col, y, ch, fg, bg, []}
end

But the UI Layout Engine drops :style when it builds the positioned element:

# lib/raxol/ui/layout/engine.ex:356-369
def process_element(%{type: :divider} = divider, space, acc) do
  char = Map.get(divider, :char, \"-\")

  [
    %{
      type: :divider,
      x: space.x,
      y: space.y,
      width: space.width,
      height: 1,
      char: char
      # <-- :style missing here
    }
    | acc
  ]
end

So by the time the renderer reads element.style, it's always %{}, and every divider paints white-on-black regardless of what the caller set.

Reproduction

column do
  [
    text(\"above\"),
    divider(char: \"─\", style: %{fg: \"#555555\"}),
    text(\"below\")
  ]
end

Expected: dark-gray divider line.
Actual: white divider line. The :style map set in the DSL never reaches the renderer.

Suggested fix

Add style: Map.get(divider, :style, %{}) to the positioned element at engine.ex:359-368. One-line change; the renderer side is already correct.

While there: _parent_style at ui_renderer.ex:273 is explicitly ignored. Since :fg/:bg are in StyleProcessor.@inheritable_properties, callers might reasonably expect a divider to inherit from its parent when no explicit style is set. Worth a separate decision.

Related

Tested on Raxol 2.4.0. Working locally via a one-line patch to lib/raxol/ui/layout/engine.ex.

Same failure pattern as #216 — style map dropped between the View DSL and the renderer — but different element (:divider vs :box) and different drop site (the engine's divider constructor rather than the box one nesting under attrs.style). Filing separately for clean triage.