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Kward

Class: Kward::PromptInterface

Inherits:
Object
  • Object
show all
Includes:
ComposerController, ComposerRenderer, KeyHandler, Layout, OverlayRenderer, PromptRenderer, QuestionPrompt, RuntimeState, Screen, SelectionPrompt, SlashOverlay, TranscriptRenderer
Defined in:
lib/kward/prompt_interface.rb,
lib/kward/prompt_interface/banner.rb,
lib/kward/prompt_interface/layout.rb,
lib/kward/prompt_interface/screen.rb,
lib/kward/prompt_interface/key_handler.rb,
lib/kward/prompt_interface/stream_state.rb,
lib/kward/prompt_interface/runtime_state.rb,
lib/kward/prompt_interface/slash_overlay.rb,
lib/kward/prompt_interface/composer_state.rb,
lib/kward/prompt_interface/prompt_renderer.rb,
lib/kward/prompt_interface/question_prompt.rb,
lib/kward/prompt_interface/overlay_renderer.rb,
lib/kward/prompt_interface/selection_prompt.rb,
lib/kward/prompt_interface/composer_renderer.rb,
lib/kward/prompt_interface/transcript_buffer.rb,
lib/kward/prompt_interface/composer_controller.rb,
lib/kward/prompt_interface/transcript_renderer.rb

Overview

Terminal transcript rendering helpers.

Defined Under Namespace

Modules: ComposerController, ComposerRenderer, KeyHandler, Layout, OverlayRenderer, PromptRenderer, QuestionPrompt, RuntimeState, Screen, SelectionPrompt, SlashOverlay, TranscriptRenderer Classes: Banner, ComposerState, StreamState, SubmittedInput, TranscriptBuffer

Constant Summary collapse

HELP_TEXT = 
"Enter sends • Shift+Enter inserts newline • ↑/↓ history • Ctrl+D exits empty prompt".freeze
BUSY_HELP_TEXT = 
"Ctrl+C cancels".freeze
SPINNER_FRAMES = 
%w[⠋ ⠙ ⠹ ⠸ ⠼ ⠴ ⠦ ⠧ ⠇ ⠏].freeze
SPINNER_INTERVAL = 
0.1
1.0
COMPOSER_MAX_INPUT_ROWS = 
6
TRANSCRIPT_BUFFER_LIMIT = 
200_000
Banner::LOGO_PIXELS
Banner::MESSAGE
KEYBOARD_PROTOCOL_ENABLE = 
"\e[>1u".freeze
KEYBOARD_PROTOCOL_RESTORE = 
"\e[<u".freeze
BRACKETED_PASTE_ENABLE = 
"\e[?2004h".freeze
BRACKETED_PASTE_RESTORE = 
"\e[?2004l".freeze
BRACKETED_PASTE_START = 
"\e[200~".freeze
BRACKETED_PASTE_END = 
"\e[201~".freeze
SYNCHRONIZED_OUTPUT_ENABLE = 
"\e[?2026h".freeze
SYNCHRONIZED_OUTPUT_DISABLE = 
"\e[?2026l".freeze
CURSOR_SHOW = 
"\e[?25h".freeze
CURSOR_HIDE = 
"\e[?25l".freeze
SHIFT_ENTER_SEQUENCES = 
["\e[13;2u", "\e[13;2~", "\e[27;2;13~", "\e\r", "\e\n"].freeze
EXIT_INPUT = 
:exit_input
CANCEL_INPUT = 
:cancel_input
SELECT_CANCEL = 
:select_cancel

Instance Method Summary collapse

Constructor Details

#initialize(input: $stdin, output: $stdout, slash_commands: [], overlay_settings: nil, footer: nil, composer_status: nil, busy_help: true, attachment_badges: nil, attachment_parser: nil, banner_pixels: nil, banner_message: nil) ⇒ PromptInterface

Returns a new instance of PromptInterface.



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# File 'lib/kward/prompt_interface.rb', line 84

def initialize(input: $stdin, output: $stdout, slash_commands: [], overlay_settings: nil, footer: nil, composer_status: nil, busy_help: true, attachment_badges: nil, attachment_parser: nil, banner_pixels: nil, banner_message: nil)
  @input_io = input
  @output_io = output
  @reader = TTY::Reader.new(input: input, output: output, interrupt: :error)
  @mutex = Mutex.new
  @composer = ComposerState.new
  self.composer_input = @composer.input
  self.composer_cursor = @composer.cursor
  @started = false
  @asking = false
  @busy = false
  @busy_activity = "streaming"
  @queued_count = 0
  @steered_count = 0
  @spinner_frame_index = 0
  @last_spinner_tick = monotonic_now
  @last_footer_refresh = monotonic_now
  @prompt_label = "You>"
  @assistant_label = "Assistant"
  @stream_state = StreamState.new
  @rendered_rows = 0
  @last_composer_rows = []
  @cursor_rendered_row = 0
  @transcript_buffer = TranscriptBuffer.new(limit: TRANSCRIPT_BUFFER_LIMIT)
  @visual_banner_count = 0
  @transcript_viewport_rows = 0
  @restoring_transcript = false
  @pending_keys = []
  @original_console_mode = nil
  @raw_mode_active = false
  @slash_commands = normalize_slash_commands(slash_commands)
  @slash_selection_index = 0
  @slash_overlay_dismissed_input = nil
  @select_state = nil
  @question_state = nil
  @last_width = screen_width
  @last_height = screen_height
  @reserved_rows = 0
  @color_enabled = ANSI.enabled?(output)
  @cursor_visible = true
  @synchronized_output_depth = 0
  @overlay_settings = normalize_overlay_settings(overlay_settings)
  @footer = footer
  @composer_status = composer_status
  @busy_help = busy_help
  @attachment_badges = attachment_badges
  @attachment_parser = attachment_parser
  @banner = Banner.new(message: banner_message, pixels: banner_pixels, screen_height: method(:screen_height))
end

Instance Method Details

#ask(message = "You>") ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 224

def ask(message = "You>")
  was_composing = @started && @asking
  start
  @mutex.synchronize do
    preserve_input = was_composing && !@busy && !composer_input.empty?
    @prompt_label = message.to_s
    unless preserve_input
      self.composer_input = @composer.prefill_input.to_s
      @composer.prefill_input = nil
      self.composer_cursor = composer_input.length
      @composer.clear_attachments
      reset_history_navigation
    end
    @pending_keys.clear
    @asking = true
    @busy = false
    @queued_count = 0
    render_prompt_locked
  end

  loop do
    key = read_key(nonblock: true)
    result = nil
    @mutex.synchronize do
      if key.nil?
        resized = handle_resize_locked
        footer_refreshed = tick_footer_locked
        render_prompt_locked if resized || footer_refreshed
      else
        result = handle_key(key)
        render_prompt_locked unless result.is_a?(String) || result == EXIT_INPUT
      end
    end
    return result if result.is_a?(String)
    return nil if result == EXIT_INPUT

    sleep 0.02 if key.nil?
  end
end

#ask_user_question(questions) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 321

def ask_user_question(questions)
  return [] if questions.empty?

  start
  saved_state = nil
  answers = []
  @mutex.synchronize { saved_state = begin_question_prompt_state }

  questions.each_with_index do |question, index|
    answer = ask_single_user_question(question, index + 1, questions.length)
    if answer == SELECT_CANCEL
      finish_question_prompt(saved_state)
      return nil
    end
    answers << answer
  end

  finish_question_prompt(saved_state)
  answers
rescue StandardError
  finish_question_prompt(saved_state) if saved_state
  raise
end

#begin_busy_input(message = "You>", activity: "streaming") ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 356

def begin_busy_input(message = "You>", activity: "streaming")
  start
  @mutex.synchronize do
    @prompt_label = message.to_s
    @busy_activity = normalize_busy_activity(activity)
    self.composer_input = ""
    self.composer_cursor = 0
    @composer.clear_attachments
              @pending_keys.clear
    @asking = true
    @busy = true
    @queued_count = 0
    @steered_count = 0
    
    reset_history_navigation
    render_prompt_locked
  end
end

#clear_steered_count ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 391

def clear_steered_count
  @mutex.synchronize do
    @steered_count = 0
    @busy_activity = "streaming"
    render_prompt_locked if @asking
  end
end

#clear_transcript ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 487

def clear_transcript
  @mutex.synchronize do
    @transcript_buffer.clear
    @visual_banner_count = 0
    @transcript_viewport_rows = 0
    @stream_state.finish_block
    @stream_state.reset
    width, height = screen_size
    with_synchronized_output_locked { redraw_screen_locked(width: width, height: height) }
    @output_io.flush
  end
end

#close ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 147

def close
  @mutex.synchronize do
    return unless @started

    clear_prompt_for_output_locked
    restore_scroll_region_locked
    @output_io.print(BRACKETED_PASTE_RESTORE)
    @output_io.print(KEYBOARD_PROTOCOL_RESTORE)
    set_cursor_visible_locked(true, force: true)
    @output_io.puts
    @output_io.flush
    @started = false
    restore_console_mode_locked
  end
end

#finish_busy_input ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 399

def finish_busy_input
  @mutex.synchronize do
    @busy = false
    @busy_activity = "streaming"
    @queued_count = 0
    @steered_count = 0
    @asking = true
    render_prompt_locked
  end
end

#finish_stream_block ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 467

def finish_stream_block
  @mutex.synchronize do
    write_stream_block_locked(nil, "", finish: true)
  end
end

#modal_active? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kward/prompt_interface.rb', line 345

def modal_active?
  @mutex.synchronize { !@question_state.nil? || !@select_state.nil? }
end

#picker_choice_width ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 274

def picker_choice_width
  [overlay_card_width(screen_width) - 6, 1].max
end

#poll_input ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 410

def poll_input
  key = read_key(nonblock: true)
  @mutex.synchronize do
    if key.nil?
      resized = handle_resize_locked
      spun = 
      footer_refreshed = tick_footer_locked
      render_prompt_locked if resized || spun || footer_refreshed
      return nil
    end

    result = handle_key(key)
    render_prompt_locked unless [EXIT_INPUT, CANCEL_INPUT].include?(result)
    [EXIT_INPUT, CANCEL_INPUT].include?(result) ? result : result
  end
end

#print_visual_banner ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 433

def print_visual_banner
  @mutex.synchronize do
    width, height = screen_size
    rows = banner_rows(width)
    return if rows.empty?

    with_synchronized_output_locked do
      prepare_transcript_output_locked
      rows.each do |row|
        write_visual_transcript_text_locked(row)
        write_visual_transcript_text_locked("\n")
      end
      @visual_banner_count += 1
      invalidate_transcript_display_rows_cache
      remember_transcript_viewport_locked(height)
      @stream_state.finish_block
      restore_composer_cursor_locked
    end
    @output_io.flush
  end
end

#redraw ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 479

def redraw
  @mutex.synchronize do
    width, height = screen_size
    with_synchronized_output_locked { redraw_screen_locked(width: width, height: height) }
    @output_io.flush
  end
end

#restore_transcript ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 200

def restore_transcript
  start(render: false) unless @started
  @mutex.synchronize do
    @output_io.print(SYNCHRONIZED_OUTPUT_ENABLE)
    clear_prompt_for_output_locked unless @rendered_rows.zero? && @last_composer_rows.empty?
    @transcript_buffer.clear
    @visual_banner_count = 0
    @transcript_viewport_rows = 0
    @stream_state.finish_block
    @stream_state.reset
    @restoring_transcript = true
  end

  yield
ensure
  @mutex.synchronize do
    @restoring_transcript = false
    width, height = screen_size
    redraw_screen_locked(width: width, height: height)
    @output_io.print(SYNCHRONIZED_OUTPUT_DISABLE)
    @output_io.flush
  end
end

#say(message) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 163

def say(message)
  @mutex.synchronize do
    text = message.to_s
    if @restoring_transcript
      write_transcript_text_locked(text)
      write_transcript_text_locked("\n") unless text.end_with?("\n")
      @stream_state.finish_block
      next
    end

    with_synchronized_output_locked do
      clear_prompt_for_output_locked
      write_transcript_text_locked(text)
      write_transcript_text_locked("\n") unless text.end_with?("\n")
      @stream_state.finish_block
      render_prompt_after_output_locked
    end
    @output_io.flush
  end
end

#say_visual(message) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 184

def say_visual(message)
  @mutex.synchronize do
    return if @restoring_transcript

    with_synchronized_output_locked do
      clear_prompt_for_output_locked
      text = message.to_s
      write_visual_transcript_text_locked(text)
      write_visual_transcript_text_locked("\n") unless text.end_with?("\n")
      @stream_state.finish_block
      render_prompt_after_output_locked
    end
    @output_io.flush
  end
end

#select(message, choices, title: "Sessions", custom: false, initial_index: 0) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 278

def select(message, choices, title: "Sessions", custom: false, initial_index: 0)
  return nil if choices.empty? && !custom

  start
  @mutex.synchronize do
    @prompt_label = message.to_s
    self.composer_input = ""
    self.composer_cursor = 0
    @composer.clear_attachments
              @pending_keys.clear
    @asking = true
    @busy = false
    @queued_count = 0
    choice_labels = choices.map(&:to_s)
    selection_index = choice_labels.empty? ? 0 : [[initial_index.to_i, 0].max, choice_labels.length - 1].min
    @select_state = { choices: choice_labels, selection_index: selection_index, title: title.to_s, custom: custom }
    reset_history_navigation
    render_prompt_locked
  end

  loop do
    key = read_key(nonblock: true)
    result = nil
    @mutex.synchronize do
      if key.nil?
        resized = handle_resize_locked
        footer_refreshed = tick_footer_locked
        render_prompt_locked if resized || footer_refreshed
      else
        result = handle_select_key(key)
        render_prompt_locked unless result.is_a?(String) || result == SELECT_CANCEL
      end
    end

    if result.is_a?(String) || result == SELECT_CANCEL
      finish_select_prompt
      return result == SELECT_CANCEL ? nil : result
    end

    sleep 0.02 if key.nil?
  end
end

#set_queued_count(count) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 375

def set_queued_count(count)
  @mutex.synchronize do
    @queued_count = count.to_i
    @steered_count = 0 if @queued_count.positive?
    render_prompt_locked if @asking
  end
end

#set_steered_count(count) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 383

def set_steered_count(count)
  @mutex.synchronize do
    @steered_count = count.to_i
    @queued_count = 0 if @steered_count.positive?
    render_prompt_locked if @asking
  end
end

#start(render: true) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 134

def start(render: true)
  @mutex.synchronize do
    return if @started

    enter_raw_mode_locked
    @started = true
    @asking = true
    @output_io.print(KEYBOARD_PROTOCOL_ENABLE)
    @output_io.print(BRACKETED_PASTE_ENABLE)
    render_prompt_locked if render
  end
end

#start_stream_block(label) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 455

def start_stream_block(label)
  @mutex.synchronize do
    write_stream_block_locked(label, "", finish: false)
  end
end

#update_assistant_label(label) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 427

def update_assistant_label(label)
  @mutex.synchronize do
    @assistant_label = label.to_s.empty? ? "Assistant" : label.to_s
  end
end

#update_overlay_settings(settings) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 349

def update_overlay_settings(settings)
  @mutex.synchronize do
    @overlay_settings = normalize_overlay_settings(settings)
    render_prompt_locked if @started && @asking
  end
end

#write_delta(delta) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 461

def write_delta(delta)
  @mutex.synchronize do
    write_stream_block_locked(nil, delta.to_s, finish: false)
  end
end

#write_stream_block(label, delta, finish: false) ⇒ Object 



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# File 'lib/kward/prompt_interface.rb', line 473

def write_stream_block(label, delta, finish: false)
  @mutex.synchronize do
    write_stream_block_locked(label, delta.to_s, finish: finish)
  end
end

#yes?(message, default: false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kward/prompt_interface.rb', line 264

def yes?(message, default: false)
  answer = ask("#{message} #{default ? "[Y/n]" : "[y/N]"}")
  return default if answer.nil?

  answer = answer.strip.downcase
  return default if answer.empty?

  answer.start_with?("y")
end