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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 buffer operations_behaviour.ex
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lib/raxol/terminal/buffer/operations_behaviour.ex 

defmodule Raxol.Terminal.Buffer.OperationsBehaviour do

  @moduledoc """

  Defines the behaviour for terminal buffer operations.

  """



  @type buffer :: list(list(Raxol.Terminal.Buffer.Cell.t()))

  @type style :: map()



  @callback resize(buffer, non_neg_integer(), non_neg_integer()) :: buffer

  @callback maybe_scroll(buffer) :: buffer

  @callback next_line(buffer) :: buffer

  @callback reverse_index(buffer) :: buffer

  @callback index(buffer) :: buffer

  @callback scroll_up(

              buffer,

              pos_integer(),

              non_neg_integer(),

              non_neg_integer()

            ) :: {buffer, non_neg_integer(), non_neg_integer()}

  @callback scroll_down(

              buffer,

              pos_integer(),

              non_neg_integer(),

              non_neg_integer()

            ) :: {buffer, non_neg_integer(), non_neg_integer()}

  @callback insert_lines(

              buffer,

              pos_integer(),

              non_neg_integer(),

              non_neg_integer()

            ) :: {buffer, non_neg_integer(), non_neg_integer()}

  @callback insert_lines(

              buffer,

              pos_integer(),

              non_neg_integer(),

              non_neg_integer(),

              non_neg_integer(),

              non_neg_integer()

            ) :: {buffer, non_neg_integer(), non_neg_integer()}

  @callback delete_lines(

              buffer,

              pos_integer(),

              non_neg_integer(),

              non_neg_integer()

            ) :: {buffer, non_neg_integer(), non_neg_integer()}

  @callback delete_lines(

              buffer,

              pos_integer(),

              non_neg_integer(),

              non_neg_integer(),

              non_neg_integer(),

              non_neg_integer()

            ) :: {buffer, non_neg_integer(), non_neg_integer()}

  @callback erase_in_line(buffer, 0..2, non_neg_integer(), non_neg_integer()) ::

              {buffer, non_neg_integer(), non_neg_integer()}

  @callback erase_in_display(buffer, 0..2, non_neg_integer(), non_neg_integer()) ::

              {buffer, non_neg_integer(), non_neg_integer()}

  @callback write_char(

              buffer,

              non_neg_integer(),

              non_neg_integer(),

              binary(),

              style()

            ) :: {buffer, non_neg_integer(), non_neg_integer()}

end