Class: Fatty::Renderer::Truecolor

Inherits:
Fatty::Renderer show all
Includes:
Curses::WindowStyling
Defined in:
lib/fatty/renderer/truecolor.rb

Constant Summary

Constants included from Curses::WindowStyling

Curses::WindowStyling::ATTR_FLAGS

Constants inherited from Fatty::Renderer

CORNER_STYLES, FRAME_STYLES, POPUP_SELECTED_GUTTER, POPUP_UNSELECTED_GUTTER

Instance Attribute Summary

Attributes inherited from Fatty::Renderer

#context, #palette, #screen

Instance Method Summary collapse

Methods included from Curses::WindowStyling

#attr_flag, #pair_attr

Methods inherited from Fatty::Renderer

#apply_theme!, #flush_ansi_draws, #invalidate!, #queue_ansi_line, #queue_ansi_popup_line, #queue_ansi_rect, #queue_ansi_segments_line, #restore_output_cursor

Constructor Details

#initialize ⇒ Truecolor

Returns a new instance of Truecolor.



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# File 'lib/fatty/renderer/truecolor.rb', line 8

def initialize(...)
  super
  @ansi_renderer = Fatty::Ansi::Renderer.new
  @pending_ansi_draws = []
end

Instance Method Details

#begin_frame ⇒ Object 



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# File 'lib/fatty/renderer/truecolor.rb', line 195

def begin_frame
  @pending_ansi_draws = []
end

#clear_physical_screen! ⇒ Object 



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# File 'lib/fatty/renderer/truecolor.rb', line 203

def clear_physical_screen!
  $stdout.write("\e[2J\e[H")
  $stdout.flush
  invalidate!
  self
end

#finish_frame ⇒ Object 



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# File 'lib/fatty/renderer/truecolor.rb', line 199

def finish_frame
  flush_ansi_draws unless @pending_ansi_draws.empty?
end

#render_alert(alert) ⇒ Object 



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# File 'lib/fatty/renderer/truecolor.rb', line 37

def render_alert(alert)
  state = alert_state(alert)
  return if state == @last_alert_state

  @last_alert_state = state
  text = alert ? alert.format : ""
  role = alert ? alert.role : :alert_info

  queue_ansi_line(
    row: screen.alert_rect.row,
    col: screen.alert_rect.col,
    width: screen.alert_rect.cols,
    text: text,
    role: role,
  )
end

#render_input_field(field) ⇒ Object 



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# File 'lib/fatty/renderer/truecolor.rb', line 69

def render_input_field(field)
  state = input_field_state(field)
  return if state == @last_input_state

  @last_input_state = state
  queue_ansi_segments_line(
    row: screen.input_rect.row,
    col: screen.input_rect.col,
    width: screen.input_rect.cols,
    segments: field_segments(
      field,
      base_role: :input,
      suggestion_role: :input_suggestion,
      region_role: :region,
    ),
    fill_role: :input,
  )
end

#render_output(output, viewport:, highlights: nil) ⇒ Object 



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# File 'lib/fatty/renderer/truecolor.rb', line 54

def render_output(output, viewport:, highlights: nil)
  lines = viewport.slice(output.lines)
  normalized = normalized_highlights(highlights)

  curr = output_state(
    viewport: viewport,
    lines: lines,
    highlights: normalized,
  )
  return if curr == @last_output_state

  draw_output_lines(lines, viewport: viewport, highlights: normalized)
  @last_output_state = curr
end

#render_pager_field(field, row:, role: :pager_status) ⇒ Object 



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# File 'lib/fatty/renderer/truecolor.rb', line 88

def render_pager_field(field, row:, role: :pager_status)
  state = pager_field_state(field, row: row, role: role)
  return if state == @last_pager_field_state

  @last_pager_field_state = state

  win = context.output_win
  return unless win

  row0, col0 = win.origin
  return unless row0 && col0

  cols = win.respond_to?(:maxx) ? win.maxx : @screen.cols

  queue_ansi_segments_line(
    row: row0 + row,
    col: col0,
    width: cols,
    segments: field_segments(
      field,
      base_role: role,
      suggestion_role: :input_suggestion,
      region_role: :region,
    ),
    fill_role: role,
  )
end

#render_popup(session:) ⇒ Object 



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# File 'lib/fatty/renderer/truecolor.rb', line 116

def render_popup(session:)
  state = popup_state(session)
  return if state == @last_popup_state

  @last_popup_state = state

  win = session.win
  return unless win

  row0, col0 = win.origin
  return unless row0 && col0

  width = win.maxx
  height = win.maxy
  inner_w = [width - 2, 0].max
  inner_h = [height - 2, 0].max

  # Draw the window with the border
  render_popup_frame(session: session)

  # Add any title
  render_popup_title(session: session) if session.title

  # Draw the message if any inside the window
  layout = PopupLayout.new(row: 0, width: inner_w)
  row = render_popup_message(session: session, layout: layout)

  counts_present = !!session.counts
  input_row = inner_h - 1
  counts_row = counts_present ? input_row - 1 : nil

  # Draw the displayed items inside the window with a gutter to have an
  # indicator of what is selected, if any.
  list_h = [inner_h - row - 1 - (counts_present ? 1 : 0), 0].max
  layout = PopupLayout.new(row: row, width: inner_w, height: list_h)
  render_popup_items(session: session, layout: layout)

  # Draw the "counts" line to indicate the total number of items, items
  # selected, and items displayed.
  layout = PopupLayout.new(row: counts_row, width: inner_w)
  render_popup_counts(session: session, layout: layout) if counts_present

  # Draw the input field for the user to type narrowing selection
  # queries.
  layout = PopupLayout.new(row: input_row, width: inner_w)
  render_popup_input_field(session: session, layout: layout)
end

#render_prompt_popup(session:) ⇒ Object 



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# File 'lib/fatty/renderer/truecolor.rb', line 164

def render_prompt_popup(session:)
  state = prompt_popup_state(session)
  return if state == @last_prompt_popup_state

  @last_prompt_popup_state = state

  win = session.win
  return unless win

  row0, col0 = win.origin
  return unless row0 && col0

  inner_w = [win.maxx - 2, 0].max
  inner_h = [win.maxy - 2, 0].max
  return if inner_w <= 0 || inner_h <= 0

  render_popup_frame(session: session)
  render_popup_title(session: session) if session.title

  layout = PopupLayout.new(row: 0, width: inner_w)
  row = render_popup_message(session: session, layout: layout)

  layout = PopupLayout.new(row: row, width: inner_w)
  render_popup_input_field(session: session, layout: layout)
rescue RuntimeError => e
  raise unless e.message.include?("closed window") ||
               e.message.include?("already closed window")

  nil
end

#render_status(text, role: :status_info) ⇒ Object 



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# File 'lib/fatty/renderer/truecolor.rb', line 14

def render_status(text, role: :status_info)
  state = status_state(text, role)
  return if state == @last_status_state

  @last_status_state = state

  lines = status_render_lines(
    text,
    width: screen.status_rect.cols,
    max_rows: screen.status_rect.rows,
  )

  screen.status_rect.rows.times do |idx|
    queue_ansi_line(
      row: screen.status_rect.row + idx,
      col: screen.status_rect.col,
      width: screen.status_rect.cols,
      text: lines[idx].to_s,
      role: role,
    )
  end
end

#restore_cursor(field) ⇒ Object 



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# File 'lib/fatty/renderer/truecolor.rb', line 210

def restore_cursor(field)
  rect = screen.input_rect
  x = field.cursor_x.to_i.clamp(0, [rect.cols - 1, 0].max)
  queue_ansi_cursor(row: rect.row, col: rect.col + x)
end

#sync_backgrounds! ⇒ Object

In truecolor mode, curses windows must still have themed backgrounds. ncurses may repaint or expose its backing store during getch/doupdate, so we must keep the backing store visually consistent with ANSI output.



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# File 'lib/fatty/renderer/truecolor.rb', line 219

def sync_backgrounds!
  return self unless context.truecolor

  sync_window_background(context.output_win, :output)
  sync_window_background(context.input_win, :input)
  sync_window_background(context.alert_win, :info)

  if @screen.status_rect.rows.positive?
    sync_window_background(context.status_win, :status)
  end
  self
end