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Multi-surface application runtime for Elixir. One TEA module renders to terminal, browser (LiveView), SSH, and MCP (agents). 30+ widgets, flexbox + CSS grid, AI agent runtime, distributed swarm with CRDTs, time-travel debugging, session recording, sandboxed REPL, and agentic commerce.

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raxol lib raxol terminal emulator style_behaviour.ex
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lib/raxol/terminal/emulator/style_behaviour.ex 

defmodule Raxol.Terminal.Emulator.Style.Behaviour do

  @moduledoc """

  Defines the behaviour for terminal emulator style management.

  This includes handling text attributes, colors, and text formatting.

  """



  alias Raxol.Terminal.Emulator.Struct, as: EmulatorStruct



  @type color :: {0..255, 0..255, 0..255} | :default

  @type decoration ::

          :none | :underline | :double_underline | :overline | :strikethrough

  @type intensity :: :normal | :bold | :faint

  @type blink :: :none | :slow | :rapid



  @callback set_attributes(EmulatorStruct.t(), list()) ::

              {:ok, EmulatorStruct.t()} | {:error, String.t()}



  @callback set_foreground(EmulatorStruct.t(), atom() | tuple()) ::

              {:ok, EmulatorStruct.t()} | {:error, String.t()}



  @callback set_background(EmulatorStruct.t(), atom() | tuple()) ::

              {:ok, EmulatorStruct.t()} | {:error, String.t()}



  @callback reset_attributes(EmulatorStruct.t()) :: {:ok, EmulatorStruct.t()}



  @callback set_intensity(EmulatorStruct.t(), intensity()) ::

              {:ok, EmulatorStruct.t()} | {:error, String.t()}



  @callback set_decoration(EmulatorStruct.t(), decoration()) ::

              {:ok, EmulatorStruct.t()} | {:error, String.t()}



  @callback set_blink(EmulatorStruct.t(), blink()) ::

              {:ok, EmulatorStruct.t()} | {:error, String.t()}

end