raxol

defmodule Raxol.Terminal.ScreenBuffer.Screen do
  @moduledoc """
  Handles screen buffer operations for the terminal emulator.
  This module provides functions for managing the screen state, including
  clearing, erasing, and marking damaged regions.
  """

  alias Raxol.Terminal.ANSI.TextFormatting

  @doc """
  Initializes a new screen state.
  """
  def init do
    %{
      damage_regions: [],
      default_style: TextFormatting.new()
    }
  end

  @doc """
  Clears the entire screen.
  """
  def clear(screen_state) do
    %{screen_state | damage_regions: [{0, 0, 80, 24}]}
  end

  @doc """
  Marks a region of the screen as damaged.
  """
  def mark_damaged(screen_state, x, y, width, height) do
    damage_regions = [{x, y, width, height} | screen_state.damage_regions]
    %{screen_state | damage_regions: damage_regions}
  end

  @doc """
  Erases from cursor to end of screen.
  """
  def erase_from_cursor_to_end(screen_state) do
    %{screen_state | damage_regions: [{0, 0, 80, 24}]}
  end

  @doc """
  Erases from start of screen to cursor.
  """
  def erase_from_start_to_cursor(screen_state) do
    %{screen_state | damage_regions: [{0, 0, 80, 24}]}
  end

  @doc """
  Erases the entire screen.
  """
  def erase_all(screen_state) do
    %{screen_state | damage_regions: [{0, 0, 80, 24}]}
  end

  @doc """
  Erases the entire screen including scrollback.
  """
  def erase_all_with_scrollback(screen_state) do
    %{screen_state | damage_regions: [{0, 0, 80, 24}]}
  end

  @doc """
  Erases from cursor to end of line.
  """
  def erase_from_cursor_to_end_of_line(screen_state) do
    %{screen_state | damage_regions: [{0, 0, 80, 1}]}
  end

  @doc """
  Erases from start of line to cursor.
  """
  def erase_from_start_of_line_to_cursor(screen_state) do
    %{screen_state | damage_regions: [{0, 0, 80, 1}]}
  end

  @doc """
  Erases the entire line.
  """
  def erase_line(screen_state) do
    %{screen_state | damage_regions: [{0, 0, 80, 1}]}
  end
end