Behaviour for HTML layout renderers.

This behaviour defines the contract that all layout-specific renderers (Grid, Table, Stack) must implement. It ensures a consistent API across all renderer types and enables compile-time checks.

Implementing a Renderer

To implement a new layout renderer:

defmodule AshReports.Renderer.Html.MyLayout do
  @behaviour AshReports.Renderer.Html.Behaviour

  alias AshReports.Layout.IR

  @impl true
  def render(%IR{type: :my_layout} = ir, opts \\ []) do
    # Render implementation
    "<div>...</div>"
  end

  @impl true
  def build_styles(properties) do
    # Style building implementation
    "display: block"
  end
end

Callbacks

• render/2 - Main rendering function that converts IR to HTML string
• build_styles/1 - Builds CSS style string from properties map