Class: OsCtl::Cli::Top::Tui::Main

Inherits:
Screen
  • Object
show all
Includes:
Lib::Utils::Humanize
Defined in:
lib/osctl/cli/top/tui/main.rb

Defined Under Namespace

Classes: Module

Constant Summary collapse

MIN_COLS = 
75
MIN_LINES = 
12
MIN_STATS_LINES = 
MIN_LINES + 6

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, rate, enable_procs: true) ⇒ Main

Returns a new instance of Main.



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# File 'lib/osctl/cli/top/tui/main.rb', line 30

def initialize(model, rate, enable_procs: true)
  super()

  if Curses.cols < MIN_COLS || Curses.lines < MIN_LINES
    raise "Terminal #{Curses.cols}x#{Curses.lines} is too small, " \
          "minimum required size is #{MIN_COLS}x#{MIN_LINES}"
  end

  @rate = rate
  @last_cols = Curses.cols
  @containers = []
  @last_count = nil
  @sort_index = 0
  @sort_desc = true
  @current_row = nil
  @view_page = 0
  @search_string = ''
  @highlighted_cts = []
  @status_bar_cols = 0
  @model_thread = Tui::ModelThread.new(model, rate)
  @model_thread.start
  @enable_procs = enable_procs
  if enable_procs
    @procs_thread = Tui::ProcessThread.new(rate)
    @procs_thread.start
  end
  @last_measurement = nil
  @last_generation = -1
  @last_procs_check = nil
  @last_mode = model_thread.mode
end

Instance Attribute Details

#current_row ⇒ Object (protected)

Returns the value of attribute current_row.



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# File 'lib/osctl/cli/top/tui/main.rb', line 221

def current_row
  @current_row
end

#enable_procs ⇒ Object (readonly, protected)

Returns the value of attribute enable_procs.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def enable_procs
  @enable_procs
end

#highlighted_cts ⇒ Object (readonly, protected)

Returns the value of attribute highlighted_cts.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def highlighted_cts
  @highlighted_cts
end

#last_count ⇒ Object (protected)

Returns the value of attribute last_count.



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# File 'lib/osctl/cli/top/tui/main.rb', line 221

def last_count
  @last_count
end

#last_data ⇒ Object (protected)

Returns the value of attribute last_data.



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# File 'lib/osctl/cli/top/tui/main.rb', line 221

def last_data
  @last_data
end

#last_generation ⇒ Object (readonly, protected)

Returns the value of attribute last_generation.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def last_generation
  @last_generation
end

#last_measurement ⇒ Object (readonly, protected)

Returns the value of attribute last_measurement.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def last_measurement
  @last_measurement
end

#last_mode ⇒ Object (readonly, protected)

Returns the value of attribute last_mode.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def last_mode
  @last_mode
end

#last_procs_check ⇒ Object (readonly, protected)

Returns the value of attribute last_procs_check.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def last_procs_check
  @last_procs_check
end

#model_thread ⇒ Object (readonly, protected)

Returns the value of attribute model_thread.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def model_thread
  @model_thread
end

#procs_thread ⇒ Object (readonly, protected)

Returns the value of attribute procs_thread.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def procs_thread
  @procs_thread
end

#rate ⇒ Object (readonly, protected)

Returns the value of attribute rate.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def rate
  @rate
end

#search_string ⇒ Object (readonly, protected)

Returns the value of attribute search_string.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def search_string
  @search_string
end

#view_page ⇒ Object (readonly, protected)

Returns the value of attribute view_page.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def view_page
  @view_page
end

#view_page_max ⇒ Object (readonly, protected)

Returns the value of attribute view_page_max.



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# File 'lib/osctl/cli/top/tui/main.rb', line 220

def view_page_max
  @view_page_max
end

Instance Method Details

#bold ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1144

def bold
  Curses.attron(Curses::A_BOLD)
  yield
  Curses.attroff(Curses::A_BOLD)
end

#compact? ⇒ Boolean (protected)

Returns:

  • (Boolean) 


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# File 'lib/osctl/cli/top/tui/main.rb', line 1176

def compact?
  Curses.cols < 91
end

#cursor ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1156

def cursor
  res = ''

  $stdin.raw do |stdin|
    $stdout << "\e[6n"
    $stdout.flush
    while (c = stdin.getc) != 'R'
      res << c if c
    end
  end

  m = res.match(/(?<row>\d+);(?<column>\d+)/)
  [m[:column].to_i, m[:row].to_i]
end

#fill_row ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1150

def fill_row
  yield
  x, y = cursor
  Curses.addstr(' ' * (Curses.cols - y))
end

#format_ctid(ctid) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1119

def format_ctid(ctid)
  if ctid.length > 12
    "#{ctid[0..11]}.."
  else
    ctid
  end
end

#format_loadavg(lavg) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1131

def format_loadavg(lavg)
  fmt =
    if lavg < 100
      '%5.2f'
    elsif lavg < 1000
      '%5.1f'
    else
      '%4.0f'
    end

  format(fmt, lavg)
end

#format_loadavgs(lavgs) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1127

def format_loadavgs(lavgs)
  lavgs.map { |lavg| format_loadavg(lavg) }.join(', ')
end

#get_data ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 872

def get_data
  ret, measured_at, generation = model_thread.get_data

  @last_data = ret
  @last_measurement = measured_at
  @last_generation = generation

  setup_modules
  run_sort
  ret
end

#header(pos) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 735

def header(pos)
  unless @header
    ret = []

    3.times do |i|
      next if i == 1 && compact?

      ret << format(
        @modules.map { |m| m.header_fmts[i] }.join(' '),
        *@modules.map do |m|
          labels = m.header_labels
          labels.is_a?(Proc) ? labels.call[i] : labels[i]
        end.flatten
      )
    end

    # Fill to the edge of the screen
    @header = ret.map do |line|
      padding = Curses.cols - line.size

      line << (' ' * padding) if padding > 0
      line << "\n"
    end
  end

  @header.each do |line|
    Curses.setpos(pos, 0)
    Curses.addstr(line)
    pos += 1
  end

  pos
end

#lookup_field(ct, field) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1102

def lookup_field(ct, field)
  if field.is_a?(Array)
    field.reduce(ct) { |acc, v| acc[v] }

  else
    ct[field]
  end
end

#max_rows ⇒ Object (protected)

Screen without header and footer



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# File 'lib/osctl/cli/top/tui/main.rb', line 1172

def max_rows
  Curses.lines - @status_bar_cols - 1 - @header.size - stats_rows - 1
end

#mode ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1111

def mode
  model_thread.mode
end

#open ⇒ Object 



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# File 'lib/osctl/cli/top/tui/main.rb', line 62

def open
  empty_data = { containers: [] }
  data = { containers: [] }
  procs_stats, @last_procs_check = enable_procs && procs_thread.get_stats

  # Initial render
  render(Time.now, procs_stats, empty_data) if last_generation == -1

  # At each loop pass, model is queried for data, unless `hold_data` is
  # greater than zero. In that case, `hold_data` is decremented by 1
  # on each pass.
  hold_data = 0

  loop do
    now = Time.now

    if last_generation != model_thread.generation \
       && (!last_data || hold_data == 0) \
       && !paused?
      data = get_data

    elsif hold_data > 0
      hold_data -= 1
      data = last_data
    end

    @containers =
      if search_active?
        data[:containers].select { |ct| ct[:id].include?(search_string) }
      else
        data[:containers]
      end

    if last_mode != model_thread.mode
      @header = nil
      Curses.clear
      @last_mode = model_thread.mode
    elsif last_count != @containers.count
      Curses.clear
    end

    self.last_count = @containers.count

    if enable_procs && !paused?
      procs_stats, @last_procs_check = procs_thread.get_stats
    end

    if @last_cols != Curses.cols
      @header = nil
      @modules = nil
      @last_cols = Curses.cols
    end

    render(now, procs_stats, data)
    Curses.timeout = rate * 1000
    input = Curses.getch

    if search_in_focus?
      case input
      when Curses::Key::ENTER, Tui::Key::ENTER
        search_end_focus
      when Tui::Key::ESCAPE
        search_cancel
      when Curses::Key::BACKSPACE, Tui::Key::BACKSPACE
        search_chop
      else
        if input && input.is_a?(String)
          search_add(input)
          Curses.clear
        end
      end

      next
    end

    case input
    when 'q'
      procs_thread.stop if enable_procs
      model_thread.stop
      return

    when Curses::Key::LEFT, '<'
      Curses.clear
      sort_next(-1)
      run_sort

    when Curses::Key::RIGHT, '>'
      Curses.clear
      sort_next(+1)
      run_sort

    when Curses::Key::UP
      selection_up
      hold_data = 1

    when Curses::Key::DOWN
      selection_down
      hold_data = 1

    when ' '
      selection_highlight

    when Curses::Key::ENTER, Tui::Key::ENTER, 't'
      selection_open_top

    when Curses::Key::NPAGE # Page Down
      Curses.clear
      view_page_down

    when Curses::Key::PPAGE # Page Up
      Curses.clear
      view_page_up

    when Curses::Key::HOME
      Curses.clear
      view_page_reset

    when Curses::Key::END
      Curses.clear
      view_page_end

    when 'h'
      selection_open_htop

    when 'r', 'R'
      Curses.clear
      sort_inverse
      run_sort

    when 'm'
      modes = Model::MODES
      i = modes.index(mode)

      model_thread.mode = if i + 1 >= modes.count
                            modes[0]

                          else
                            modes[i + 1]
                          end

    when 'p'
      paused? ? unpause : pause

    when '/'
      search_start_focus

    when '?'
      return Tui::Help.new(self)

    when Curses::Key::RESIZE
      @modules = nil
      Curses.clear
    end
  end
end

#pause ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1180

def pause
  @paused = true
end

#paused? ⇒ Boolean (protected)

Returns:

  • (Boolean) 


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# File 'lib/osctl/cli/top/tui/main.rb', line 1188

def paused?
  @paused
end

#print_row(ct) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 769

def print_row(ct)
  # Special case for container ID as that is always visible
  Curses.addstr(format("#{@modules[0].row_fmt.join(' ')} ", *@modules[0].row_values.call(ct)))

  print_row_data(@modules[1..].map { |m| m.row_values.call(ct) }.flatten)
end

#print_row_data(values) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 776

def print_row_data(values)
  fmts = @modules[1..].map(&:row_fmt).flatten
  w = 15 # container ID is printed in {#print_row}

  fmts.zip(values).each_with_index do |pair, i|
    f, v = pair
    s = format("#{f} ", v)
    w += s.length

    Curses.attron(Curses::A_BOLD) if i == @sort_index
    Curses.addstr(s)
    Curses.attroff(Curses::A_BOLD) if i == @sort_index
  end

  # Fill space to the edge of the screen, needed for selected rows
  Curses.addstr(' ' * (Curses.cols - w)) if Curses.cols > w
end

#render(t, procs_stats, data) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 527

def render(t, procs_stats, data)
  setup_modules

  Curses.setpos(0, 0)
  Curses.addstr("#{File.basename($0)} ct top - #{t.strftime('%H:%M:%S')}")
  Curses.addstr(format(' [%.1fs]', last_measurement - t)) if last_measurement

  lavg = data[:loadavg] ? format_loadavgs(data[:loadavg]) : '?'

  if compact?
    Curses.addstr(" #{model_thread.mode}, loadavg #{lavg}")
  else
    Curses.addstr(" #{model_thread.mode} mode, load average #{lavg}")
  end

  i = status_bar(1, t, procs_stats, data)

  Curses.attron(Curses.color_pair(1))
  i = header(i + 1)
  j = 0
  Curses.attroff(Curses.color_pair(1))

  ct_count = @containers.length
  @view_offset, view_ct_count, @view_page_max, @view_page =
    view_window(ct_count, Curses.lines - stats_rows - i, view_page)
  shown_ct_count = [view_ct_count, ct_count - @view_offset].min

  @containers[@view_offset, shown_ct_count].each do |ct|
    Curses.setpos(i, 0)

    attr = if current_row == j && highlighted_cts.include?(ct[:id])
             Curses.color_pair(Tui::SELECTED_HIGHLIGHTED)

           elsif current_row == j
             Curses.color_pair(Tui::SELECTED)

           elsif highlighted_cts.include?(ct[:id])
             Curses.color_pair(Tui::HIGHLIGHTED)

           end

    Curses.attron(attr) if attr
    print_row(ct)
    Curses.attroff(attr) if attr

    i += 1
    j += 1

    break if i >= (Curses.lines - stats_rows)
  end

  stats(data, [@view_offset, shown_ct_count, ct_count]) if Curses.lines >= MIN_STATS_LINES

  Curses.refresh
end

#rt? ⇒ Boolean (protected)

Returns:

  • (Boolean) 


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# File 'lib/osctl/cli/top/tui/main.rb', line 1115

def rt?
  model_thread.mode == :realtime
end

#run_sort ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 916

def run_sort
  last_data[:containers].sort! do |a, b|
    sortable_value(a) <=> sortable_value(b)
  end

  last_data[:containers].reverse! if @sort_desc
end

#search_active? ⇒ Boolean (protected)

Returns:

  • (Boolean) 


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# File 'lib/osctl/cli/top/tui/main.rb', line 1079

def search_active?
  !@search_string.empty?
end

#search_add(input) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1083

def search_add(input)
  @search_string << input
end

#search_cancel ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1074

def search_cancel
  search_end_focus
  @search_string = ''
end

#search_chop ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1087

def search_chop
  @search_string.chop!
end

#search_end_focus ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1069

def search_end_focus
  Curses.curs_set(0)  # hide cursor
  @search_input = false
end

#search_in_focus? ⇒ Boolean (protected)

Returns:

  • (Boolean) 


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# File 'lib/osctl/cli/top/tui/main.rb', line 1065

def search_in_focus?
  @search_input
end

#search_start_focus ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1058

def search_start_focus
  @search_input = true

  Curses.curs_set(1)  # show cursor
  Curses.clear
end

#selection_down ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 946

def selection_down
  if @current_row
    new_row = @current_row + 1

    @current_row = if new_row < @containers.size && new_row < max_rows
                     new_row

                   elsif @containers.any?
                     0

                   end

  elsif @containers.any?
    @current_row = 0
  end
end

#selection_highlight ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 963

def selection_highlight
  return unless @current_row

  ct = @containers[@view_offset + @current_row]
  return unless ct

  ctid = ct[:id]

  if highlighted_cts.include?(ctid)
    highlighted_cts.delete(ctid)

  else
    highlighted_cts << ctid
  end
end

#selection_open_htop ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 983

def selection_open_htop
  selection_open_program { %w[htop] }
end

#selection_open_program(&block) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 987

def selection_open_program(&block)
  return unless @current_row

  ct = @containers[@view_offset + @current_row]
  return unless ct

  if ct[:id] == '[host]'
    pid = Process.fork do
      Curses.close_screen
      Process.exec(*block.call)
    end
  elsif ct[:init_pid]
    pid = Process.fork do
      sys = OsCtl::Lib::Sys.new

      sys.setns_path(
        File.join('/proc', ct[:init_pid].to_s, 'ns/pid'),
        OsCtl::Lib::Sys::CLONE_NEWPID
      )
      sys.unshare_ns(OsCtl::Lib::Sys::CLONE_NEWNS)

      # Enter the PID namespace in a child process
      child = Process.fork do
        sys.mount_proc('/proc')

        Curses.close_screen
        Process.exec(*block.call)
      end

      Process.wait(child)
      exit($?.exitstatus)
    end
  else
    return
  end

  Process.wait(pid)

  # The screen needs to be reinitialized after top
  Curses.init_screen
  Curses.start_color
  Curses.crmode
  Curses.stdscr.keypad = true
  Curses.curs_set(0)  # hide cursor
  Curses.clear
end

#selection_open_top ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 979

def selection_open_top
  selection_open_program { %w[top] }
end

#selection_up ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 924

def selection_up
  last_row = [max_rows - 1, @containers.size - 1].min

  if @current_row
    new_row = @current_row - 1

    @current_row = if new_row >= 0
                     new_row

                   elsif new_row == -1
                     nil

                   elsif @containers.any?
                     last_row

                   end

  elsif @containers.any?
    @current_row = last_row
  end
end

#setup_modules ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 223

def setup_modules
  return if @modules

  @modules = []

  @modules << Module.new(
    name: 'ctid',
    header_fmts: ['%-14s'] * 3,
    header_labels: [
      ['Container'],
      [''],
      ['ID']
    ],
    row_fmt: ['%-14s'],
    row_values: proc do |ct|
      [format_ctid(ct[:id])]
    end,
    stats_cts_values: [],
    stats_all_values: []
  )

  @modules << Module.new(
    name: 'cpu',
    header_fmts: ['%9s'] * 3,
    header_labels: [
      ['CPU'],
      [''],
      ['']
    ],
    row_fmt: ['%9s'],
    row_values: proc do |ct|
      cpu = (rt? ? format_percent(ct[:cpu_usage]) : humanize_time_us(ct[:cpu_us])).to_s
      cpu << "/#{ct[:cpu_package_inuse]}" if ct[:cpu_package_inuse]
      [cpu]
    end,
    sortable_fields: proc do
      rt? ? :cpu_usage : :cpu_us
    end,
    stats_cts_values: proc do |cts|
      if rt?
        [format_percent(sum(cts, :cpu_usage, false))]
      else
        [humanize_time_us(sum(cts, :cpu_us, false))]
      end
    end,
    stats_all_values: proc do |cts|
      if rt?
        [format_percent(sum(cts, :cpu_usage, true))]
      else
        [humanize_time_us(sum(cts, :cpu_us, true))]
      end
    end
  )

  @modules << Module.new(
    name: 'memory',
    header_fmts: ['%8s'] * 3,
    header_labels: [
      ['Memory'],
      [''],
      ['']
    ],
    row_fmt: ['%8s'],
    row_values: proc do |ct|
      [humanize_data(ct[:memory])]
    end,
    sortable_fields: :memory,
    stats_cts_values: proc do |cts|
      [humanize_data(sum(cts, :memory, false))]
    end,
    stats_all_values: proc do |cts|
      [humanize_data(sum(cts, :memory, true))]
    end
  )

  @modules << Module.new(
    name: 'proc',
    header_fmts: ['%6s'] * 3,
    header_labels: [
      ['Proc'],
      [''],
      ['']
    ],
    row_fmt: ['%6s'],
    row_values: proc do |ct|
      [ct[:nproc]]
    end,
    sortable_fields: :nproc,
    stats_cts_values: proc do |cts|
      [sum(cts, :nproc, false)]
    end,
    stats_all_values: proc do |cts|
      [sum(cts, :nproc, true)]
    end
  )

  if Curses.cols >= 114
    @modules << Module.new(
      name: 'zfsio',
      header_fmts: ['%27s', '%13s %13s', '%6s %6s %6s %6s'],
      header_labels: proc do
        [
          ['ZFSIO          '],
          ['Read   ', 'Write   '],
          ['Bytes', rt? ? 'IOPS' : 'IO', 'Bytes', rt? ? 'IOPS' : 'IO']
        ]
      end,
      row_fmt: ['%6s'] * 4,
      row_values: proc do |ct|
        [
          humanize_data(ct[:zfsio][:bytes][:r]),
          humanize_number(ct[:zfsio][:ios][:r]),
          humanize_data(ct[:zfsio][:bytes][:w]),
          humanize_number(ct[:zfsio][:ios][:w])
        ]
      end,
      sortable_fields: [
        %i[zfsio bytes r],
        %i[zfsio ios r],
        %i[zfsio bytes w],
        %i[zfsio ios w]
      ],
      stats_cts_values: proc do |cts|
        [
          humanize_data(sum(cts, %i[zfsio bytes r], false)),
          humanize_number(sum(cts, %i[zfsio ios r], false)),
          humanize_data(sum(cts, %i[zfsio bytes w], false)),
          humanize_number(sum(cts, %i[zfsio ios w], false))
        ]
      end,
      stats_all_values: proc do |cts|
        [
          humanize_data(sum(cts, %i[zfsio bytes r], true)),
          humanize_number(sum(cts, %i[zfsio ios r], true)),
          humanize_data(sum(cts, %i[zfsio bytes w], true)),
          humanize_number(sum(cts, %i[zfsio ios w], true))
        ]
      end,
      stats_iostat_values: proc do |iostat|
        [
          humanize_data(iostat[:bytes_read]),
          humanize_data(iostat[:io_read]),
          humanize_data(iostat[:bytes_written]),
          humanize_data(iostat[:io_written])
        ]
      end
    )
  end

  @modules <<
    if compact?
      Module.new(
        name: 'network',
        header_fmts: ['%18s', '', '%8s %8s'],
        header_labels: proc do
          [
            ['Network     '],
            [],
            rt? ? ['TX bps', 'RX bps'] : ['TX bytes', 'RX bytes']
          ]
        end,
        row_fmt: ['%8s'] * 2,
        row_values: proc do |ct|
          [
            humanize_data(rt? ? ct[:tx][:bytes] * 8 : ct[:tx][:bytes]),
            humanize_data(rt? ? ct[:rx][:bytes] * 8 : ct[:rx][:bytes])
          ]
        end,
        sortable_fields: [
          %i[tx bytes],
          %i[rx bytes]
        ],
        stats_cts_values: proc do |cts|
          [
            humanize_data(sum(cts, %i[tx bytes], false) * (rt? ? 8 : 1)),
            humanize_data(sum(cts, %i[rx bytes], false) * (rt? ? 8 : 1))
          ]
        end,
        stats_all_values: proc do |cts|
          [
            humanize_data(sum(cts, %i[tx bytes], true) * (rt? ? 8 : 1)),
            humanize_data(sum(cts, %i[rx bytes], true) * (rt? ? 8 : 1))
          ]
        end
      )
    else
      Module.new(
        name: 'network',
        header_fmts: ['%27s', '%13s %13s', '%6s %6s %6s %6s'],
        header_labels: proc do
          [
            ['Network        '],
            ['TX    ', 'RX    '],
            rt? ? %w[bps pps bps pps] : %w[Bytes Packet Bytes Packet]
          ]
        end,
        row_fmt: ['%6s'] * 4,
        row_values: proc do |ct|
          [
            humanize_data(rt? ? ct[:tx][:bytes] * 8 : ct[:tx][:bytes]),
            humanize_data(ct[:tx][:packets]),
            humanize_data(rt? ? ct[:rx][:bytes] * 8 : ct[:rx][:bytes]),
            humanize_data(ct[:rx][:packets])
          ]
        end,
        sortable_fields: [
          %i[tx bytes],
          %i[tx packets],
          %i[rx bytes],
          %i[rx packets]
        ],
        stats_cts_values: proc do |cts|
          [
            humanize_data(sum(cts, %i[tx bytes], false) * (rt? ? 8 : 1)),
            humanize_data(sum(cts, %i[tx packets], false)),
            humanize_data(sum(cts, %i[rx bytes], false) * (rt? ? 8 : 1)),
            humanize_data(sum(cts, %i[rx packets], false))
          ]
        end,
        stats_all_values: proc do |cts|
          [
            humanize_data(sum(cts, %i[tx bytes], true) * (rt? ? 8 : 1)),
            humanize_data(sum(cts, %i[tx packets], true)),
            humanize_data(sum(cts, %i[rx bytes], true) * (rt? ? 8 : 1)),
            humanize_data(sum(cts, %i[rx packets], true))
          ]
        end
      )
    end

  @modules <<
    if compact?
      Module.new(
        name: 'loadavg',
        header_fmts: ['%12s', '', '%5s %5s'],
        header_labels: [
          ['LoadAvg  '],
          [''],
          ['1m', '5m']
        ],
        row_fmt: ['%5s'] * 2,
        row_values: proc do |ct|
          [
            format_loadavg(ct[:loadavg][0]),
            format_loadavg(ct[:loadavg][1])
          ]
        end,
        sortable_fields: [
          [:loadavg, 0],
          [:loadavg, 1]
        ],
        stats_cts_values: proc do |cts|
          [
            format_loadavg(sum(cts, [:loadavg, 0], false)),
            format_loadavg(sum(cts, [:loadavg, 1], false))
          ]
        end,
        stats_all_values: proc do |_cts, data|
          [
            data[:loadavg] ? format_loadavg(data[:loadavg][0]) : '-',
            data[:loadavg] ? format_loadavg(data[:loadavg][1]) : '-'
          ]
        end
      )
    else
      Module.new(
        name: 'loadavg',
        header_fmts: ['%17s', '%17s', '%5s %5s %5s'],
        header_labels: [
          ['LoadAvg    '],
          [''],
          ['1m', '5m', '15m']
        ],
        row_fmt: ['%5s'] * 3,
        row_values: proc do |ct|
          [
            format_loadavg(ct[:loadavg][0]),
            format_loadavg(ct[:loadavg][1]),
            format_loadavg(ct[:loadavg][2])
          ]
        end,
        sortable_fields: [
          [:loadavg, 0],
          [:loadavg, 1],
          [:loadavg, 2]
        ],
        stats_cts_values: proc do |cts|
          [
            format_loadavg(sum(cts, [:loadavg, 0], false)),
            format_loadavg(sum(cts, [:loadavg, 1], false)),
            format_loadavg(sum(cts, [:loadavg, 2], false))
          ]
        end,
        stats_all_values: proc do |_cts, data|
          [
            data[:loadavg] ? format_loadavg(data[:loadavg][0]) : '-',
            data[:loadavg] ? format_loadavg(data[:loadavg][1]) : '-',
            data[:loadavg] ? format_loadavg(data[:loadavg][2]) : '-'
          ]
        end
      )
    end
end

#sort_inverse ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 902

def sort_inverse
  @sort_desc = !@sort_desc
end

#sort_next(n) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 888

def sort_next(n)
  next_i = @sort_index + n
  fields = sortable_fields

  if next_i < 0
    next_i = fields.count - 1

  elsif next_i >= fields.count
    next_i = 0
  end

  @sort_index = next_i
end

#sortable_fields ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 906

def sortable_fields
  @modules[1..].map do |m|
    if m.sortable_fields.is_a?(Proc)
      m.sortable_fields.call
    else
      m.sortable_fields
    end
  end.flatten(1)
end

#sortable_value(ct) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 884

def sortable_value(ct)
  lookup_field(ct, sortable_fields[@sort_index])
end

#stats(data, ct_view) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 802

def stats(data, ct_view)
  cts = data[:containers]
  pos = stats_rows

  Curses.setpos(Curses.lines - pos, 0)
  pos -= 1
  Curses.addstr('─' * Curses.cols)
  # Curses.addstr('-' * Curses.cols)

  Curses.setpos(Curses.lines - pos, 0)
  pos -= 1
  Curses.addstr(format('%-14s ', 'Containers:'))
  print_row_data(@modules[1..].map { |m| m.stats_cts_values.call(cts, data) }.flatten)

  Curses.setpos(Curses.lines - pos, 0)
  pos -= 1
  Curses.addstr(format('%-14s ', 'All:'))
  print_row_data(@modules[1..].map { |m| m.stats_all_values.call(cts, data) }.flatten)

  if model_thread.iostat_enabled? && @modules.detect { |m| m.name == 'zfsio' }
    iostat = data[:zfs] && data[:zfs][:iostat]

    Curses.setpos(Curses.lines - pos, 0)
    pos -= 1
    Curses.addstr(format('%-14s ', 'iostat:'))

    if iostat
      print_row_data(@modules[1..].map { |m| m.stats_iostat_values.call(iostat) }.flatten)
    end
  end

  Curses.setpos(Curses.lines - pos, 0)
  pos -= 1
  Curses.addstr('─' * Curses.cols)
  Curses.setpos(Curses.lines - pos, 0)

  search_msg = nil

  fill_row do
    if search_in_focus? || search_active?
      search_msg = "Search: #{search_string}"
      Curses.addstr(search_msg)
      next
    end

    Curses.addstr('Selected container: ')

    if @current_row && (ct = @containers[@view_offset + @current_row])
      if ct[:id] == '[host]'
        Curses.addstr('host system')
      else
        Curses.addstr("#{ct[:pool]}:#{ct[:id]}")
      end
    else
      Curses.addstr('none')
    end
  end

  offset, view_count, ct_count = ct_view
  view_from = view_count > 0 ? offset + 1 : 0
  page = format('[%d-%d/%d]', view_from, offset + view_count, ct_count)

  Curses.setpos(Curses.lines - pos, Curses.cols - page.length)
  Curses.addstr(page)

  return unless search_in_focus?

  Curses.setpos(Curses.lines - pos, search_msg.length)
end

#stats_rows ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 794

def stats_rows
  return 0 if Curses.lines < MIN_STATS_LINES

  i = 5
  i += 1 if model_thread.iostat_enabled? && @modules.detect { |m| m.name == 'zfsio' }
  i
end

#status_bar(orig_pos, t, procs_stats, data) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 596

def status_bar(orig_pos, t, procs_stats, data)
  pos = orig_pos
  @status_bar_cols = 0

  # Processes
  if enable_procs
    Curses.setpos(pos, 0)
    Curses.addstr('Tasks')
    Curses.addstr(format(' [%.1fs]', @last_procs_check - t)) if @last_procs_check
    Curses.addstr(': ')
    bold { Curses.addstr(format('%5d', procs_stats['TOTAL'])) }
    Curses.addstr(compact? ? ' tot, ' : ' total, ')
    bold { Curses.addstr(format('%3d', procs_stats['R'])) }
    Curses.addstr(compact? ? ' run, ' : ' running, ')
    bold { Curses.addstr(format('%3d', procs_stats['D'])) }
    Curses.addstr(compact? ? ' block, ' : ' blocked, ')
    bold { Curses.addstr(format('%5d', procs_stats['S'])) }
    Curses.addstr(compact? ? ' sleep, ' : ' sleeping, ')
    bold { Curses.addstr(format('%2d', procs_stats['T'])) }
    Curses.addstr(compact? ? ' stop, ' : ' stopped, ')
    bold { Curses.addstr(format('%2d', procs_stats['Z'])) }
    Curses.addstr(compact? ? ' zom' : ' zombie ')
    pos += 1
  end

  # CPU
  cpu = data[:cpu]

  Curses.setpos(pos, 0)
  Curses.addstr('%CPU: ')

  if cpu
    bold { Curses.addstr(format('%5.1f', format_percent(cpu[:user]))) }
    Curses.addstr(' us, ')
    bold { Curses.addstr(format('%5.1f', format_percent(cpu[:system]))) }
    Curses.addstr(' sy, ')
    bold { Curses.addstr(format('%5.1f', format_percent(cpu[:nice]))) }
    Curses.addstr(' ni, ')
    bold { Curses.addstr(format('%5.1f', format_percent(cpu[:idle]))) }
    Curses.addstr(' id, ')
    bold { Curses.addstr(format('%5.1f', format_percent(cpu[:iowait]))) }
    Curses.addstr(' wa, ')
    bold { Curses.addstr(format('%5.1f', format_percent(cpu[:irq]))) }
    Curses.addstr(' hi, ')
    bold { Curses.addstr(format('%5.1f', format_percent(cpu[:softirq]))) }
    Curses.addstr(' si')

  else
    Curses.addstr('calculating')
  end

  # Memory
  mem = data[:memory]

  Curses.setpos(pos += 1, 0)
  Curses.addstr('Memory: ')

  if mem
    bold { Curses.addstr(format('%8s', humanize_data(mem[:total]))) }
    Curses.addstr(' total, ')
    bold { Curses.addstr(format('%8s', humanize_data(mem[:free]))) }
    Curses.addstr(' free, ')
    bold { Curses.addstr(format('%8s', humanize_data(mem[:used]))) }
    Curses.addstr(' used, ')
    bold { Curses.addstr(format('%8s', humanize_data(mem[:buffers] + mem[:cached]))) }
    Curses.addstr(' buff/cache')

    if mem[:swap_total] > 0
      Curses.setpos(pos += 1, 0)
      Curses.addstr('Swap:   ')

      bold { Curses.addstr(format('%8s', humanize_data(mem[:swap_total]))) }
      Curses.addstr(' total, ')
      bold { Curses.addstr(format('%8s', humanize_data(mem[:swap_free]))) }
      Curses.addstr(' free, ')
      bold { Curses.addstr(format('%8s', humanize_data(mem[:swap_used]))) }
      Curses.addstr(' used')
    end

  else
    Curses.addstr('calculating')
  end

  # ZFS ARC
  arc = data[:zfs] && data[:zfs][:arcstats][:arc]

  Curses.setpos(pos += 1, 0)
  Curses.addstr('ARC:    ')

  if arc
    bold { Curses.addstr(format('%8s', humanize_data(arc[:c_max]))) }
    Curses.addstr(' c_max, ')
    bold { Curses.addstr(format('%8s', humanize_data(arc[:c]))) }
    Curses.addstr(' c,    ')
    bold { Curses.addstr(format('%8s', humanize_data(arc[:size]))) }
    Curses.addstr(compact? ? ' s, ' : ' size, ')
    bold { Curses.addstr(format('%8.2f', format_percent(arc[:hit_rate]))) }
    Curses.addstr(compact? ? ' hit, ' : ' hitrate, ')
    bold { Curses.addstr(format('%6d', arc[:misses])) }
    Curses.addstr(compact? ? ' mis' : ' missed ')

  else
    Curses.addstr('calculating')
  end

  l2arc = data[:zfs] && data[:zfs][:arcstats][:l2arc]

  if l2arc && l2arc[:size] > 0
    Curses.setpos(pos += 1, 0)
    Curses.addstr("L2ARC:  #{' ' * 16}")

    bold { Curses.addstr(format('%8s', humanize_data(l2arc[:size]))) }
    Curses.addstr(' size, ')
    bold { Curses.addstr(format('%8s', humanize_data(l2arc[:asize]))) }
    Curses.addstr(' asize,')
    bold { Curses.addstr(format('%8.2f', humanize_data(l2arc[:hit_rate]))) }
    Curses.addstr(' hitrate, ')
    bold { Curses.addstr(format('%6d', l2arc[:misses])) }
    Curses.addstr(' missed ')
  end

  # Containers
  Curses.setpos(pos += 1, 0)
  Curses.addstr('Containers: ')
  bold { Curses.addstr(format('%3d', model_thread.containers.count)) }
  Curses.addstr(' total, ')
  bold { Curses.addstr(format('%3d', model_thread.containers.count { |ct| ct.state == :starting })) }
  Curses.addstr(' starting, ')
  bold { Curses.addstr(format('%3d', data[:containers].count - 1)) } # -1 for [host]
  Curses.addstr(' running, ')
  bold { Curses.addstr(format('%3d', model_thread.containers.count { |ct| ct.state == :stopping })) }
  Curses.addstr(' stopping, ')
  bold { Curses.addstr(format('%3d', model_thread.containers.count { |ct| ct.state == :stopped })) }
  Curses.addstr(' stopped')

  @status_bar_cols += pos - orig_pos + 1
  pos + 1
end

#sum(cts, field, host) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1091

def sum(cts, field, host)
  cts.inject(0) do |acc, ct|
    if ct[:id] == '[host]' && !host
      acc

    else
      acc + lookup_field(ct, field)
    end
  end
end

#unpause ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1184

def unpause
  @paused = false
end

#view_page_down ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1034

def view_page_down
  @view_page += 1

  return unless @view_page_max && @view_page > @view_page_max

  @view_page = @view_page_max
end

#view_page_end ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1050

def view_page_end
  if view_page_max
    @view_page = view_page_max
  else
    view_page_down
  end
end

#view_page_reset ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1046

def view_page_reset
  @view_page = 0
end

#view_page_up ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 1042

def view_page_up
  @view_page -= 1 if @view_page > 0
end

#view_window(ct_count, row_count, page) ⇒ Object (protected) 



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# File 'lib/osctl/cli/top/tui/main.rb', line 583

def view_window(ct_count, row_count, page)
  row_count = [row_count, 0].max

  return [0, row_count, 0, 0] if row_count == 0 || ct_count <= row_count

  page_step = [row_count / 2, 1].max
  page_max = (ct_count - row_count).fdiv(page_step).ceil
  page = page.clamp(0, page_max)
  offset = [page_step * page, ct_count - row_count].min

  [offset, row_count, page_max, page]
end