Module: JsClient::KeyboardInput

Defined in:
lib/jschat/client.rb

Instance Method Summary collapse

Instance Method Details

#arrow_keys(data) ⇒ Object 



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# File 'lib/jschat/client.rb', line 412

def arrow_keys(data)
  c = data[0]
  if @sequence
    @sequence << c
    history_text = ''

    if data == 'A'
      @sequence = nil
      history_text = get_history_text(-1)
    elsif data == 'B'
      @sequence = nil
      history_text = get_history_text
    elsif data == 'O'
      return true
    elsif data == 'D'
      # left
      @sequence = nil
      @input_form.form_driver Ncurses::Form::REQ_PREV_CHAR
      @windows[:input].refresh
      return true
    elsif data == 'C'
      # right
      @input_form.form_driver Ncurses::Form::REQ_NEXT_CHAR
      @windows[:input].refresh
      @sequence = nil
      return true
    else
      @sequence = nil
      return true
    end

    begin
      @input_form.form_driver Ncurses::Form::REQ_CLR_FIELD
      @input_field.set_field_buffer(0, history_text)
      @windows[:input].addstr history_text
      @windows[:input].refresh
      @input_form.form_driver Ncurses::Form::REQ_END_LINE
    rescue Exception => exception
    end

    return true
  elsif c == 27
    @sequence = c
    return true
  end
end

#connection=(connection) ⇒ Object 



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# File 'lib/jschat/client.rb', line 656

def connection=(connection)
  @connection = connection
  @tab_completion = JsClient::TabComplete.new
end

#cursor_position ⇒ Object 



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# File 'lib/jschat/client.rb', line 459

def cursor_position
  cursor_position = Ncurses.getcurx(@windows[:input]) - 10
end

#display_input ⇒ Object 



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# File 'lib/jschat/client.rb', line 335

def display_input
  offset = @room_name.size > 0 ? @room_name.size + 3 : 0
  @input_field = Ncurses::Form::FIELD.new(1, Ncurses.COLS - offset, 0, offset, 0, 0)
  Ncurses::Form.field_opts_off(@input_field, Ncurses::Form::O_AUTOSKIP)
  Ncurses::Form.field_opts_off(@input_field, Ncurses::Form::O_STATIC)
  @input_form = Ncurses::Form::FORM.new([@input_field])
  @input_form.set_form_win @windows[:input]
  @input_form.post_form
  @input_field.set_field_buffer 0, ''
end

#display_room_name ⇒ Object 



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# File 'lib/jschat/client.rb', line 346

def display_room_name
  if @room_name
    display_input
    @windows[:input].mvprintw(0, 0, "[#{@room_name}] ")
    @windows[:input].refresh
  end
end

#display_text(message, time = Time.now.localtime) ⇒ Object 



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# File 'lib/jschat/client.rb', line 543

def display_text(message, time = Time.now.localtime)
  message = message.dup
  @windows[:text].addstr "#{time.strftime('%H:%M')} "

  if message.match /^\*/
    @windows[:text].attrset(Ncurses.COLOR_PAIR(3))
  end

  if message.match /^\* \[ERROR\]/
    @windows[:text].attrset(Ncurses.COLOR_PAIR(6))
  elsif message.match /^\[/
    channel_info = message.split(']').first.sub /\[/, ''
    message.sub! "[#{channel_info}]", ''

    @windows[:text].attrset(Ncurses.COLOR_PAIR(5))
    @windows[:text].addstr "["
    @windows[:text].attrset(Ncurses.COLOR_PAIR(4))
    @windows[:text].addstr "#{channel_info}"
    @windows[:text].attrset(Ncurses.COLOR_PAIR(5))
    @windows[:text].addstr "] "

    name = message.split('>').first.sub(/</, '').strip
    message.sub!("<#{name}> ", '')
    @windows[:text].attrset(Ncurses.COLOR_PAIR(5))
    @windows[:text].addstr '<'
    @windows[:text].attrset(Ncurses.COLOR_PAIR(0))
    @windows[:text].addstr "#{name}"
    @windows[:text].attrset(Ncurses.COLOR_PAIR(5))
    @windows[:text].addstr '>'
    @windows[:text].attrset(Ncurses.COLOR_PAIR(0))
  end

  @windows[:text].addstr "#{message}\n"
  @windows[:text].refresh
  @windows[:input].refresh

  display_time

  if message.match /^\*/
    @windows[:text].attrset(Ncurses.COLOR_PAIR(0))
  end
end

#display_time ⇒ Object 



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# File 'lib/jschat/client.rb', line 354

def display_time
  @windows[:info].move 0, 0
  @windows[:info].addstr "[#{Time.now.strftime('%H:%M')}]\n"
  @windows[:info].refresh
  @windows[:input].refresh
end

#display_windows ⇒ Object 



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# File 'lib/jschat/client.rb', line 319

def display_windows
  rows, cols = get_window_size
  @windows[:text] = Ncurses.newwin(rows - 1, cols, 0, 0)
  @windows[:info] = Ncurses.newwin(rows - 1, cols, rows - 2, 0)
  @windows[:input] = Ncurses.newwin(rows, cols, rows - 1, 0)
  @windows[:text].scrollok(true)
  @windows[:info].bkgd Ncurses.COLOR_PAIR(2)
  @windows[:input].keypad(true)
  @windows[:input].nodelay(true)

  @windows[:text].refresh
  @windows[:info].refresh
  @windows[:input].refresh
  display_input
end

#get_history_text(offset = 1) ⇒ Object 



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# File 'lib/jschat/client.rb', line 399

def get_history_text(offset = 1)
  offset_position = @history_position + offset
  if offset_position >= 0 and offset_position < @history.size
    @history_position = offset_position
    @history[@history_position]
  else
    if @history_position > -1 and @history_position < @history.size
      @history_position = offset_position
    end
    ''
  end
end

#get_window_size ⇒ Object

FIXME: This doesn’t work after resize I’ve tried other ruby ncurses programs and they don’t either



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# File 'lib/jschat/client.rb', line 392

def get_window_size
  Ncurses.refresh
  cols, rows = [], []
  Ncurses.stdscr.getmaxyx rows, cols
  [rows.first, cols.first]
end

#help_text ⇒ Object 



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# File 'lib/jschat/client.rb', line 591

def help_text
  <<-TEXT
*** JsChat Help ***
Commands start with a forward slash.  Parameters in square brackets are optional.
/name new_name      - Change your name.  Alias: /nick
/names [room name]  - List the people in a room.
/join #room         - Join a room.  Alias: /j
/switch #room       - Speak in a different room.  Alias: /s
/part #room         - Leave a room.  Alias: /p
/message person     - Send a private message.  Alias: /m
/lastlog            - Display the last 100 messages for a room.
/quit               - Quit JsChat
*** End Help ***

  TEXT
end

#manage_commands(line) ⇒ Object 



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# File 'lib/jschat/client.rb', line 608

def manage_commands(line)
  operand = strip_command line
  case line
    when %r{^/switch}, %r{^/s}
      @connection.switch_room operand
    when %r{^/names}
      @connection.send_names operand
    when %r{^/name}, %r{^/nick}
      @connection.send_change_name operand
    when %r{^/quit}
      quit
    when %r{^/join}, %r{^/j}
      @connection.send_join operand
    when %r{^/part}, %r{^/p}
      @connection.send_part operand
    when %r{^/lastlog}
      @connection.send_lastlog
    when %r{^/clear}
      @windows[:text].clear
      @windows[:text].refresh
      display_time
    when %r{^/message}, %r{^/m}
      if operand and operand.size > 0
        message = operand.match(/([^ ]*)\s+(.*)/)
        if message
          @connection.send_private_message message[1], message[2]
        end
      end
    when %r{^/help}
      help_text.split("\n").each do |message|
        display_text message
      end
    when %r{^/}
      display_text '* Command not found.  Try using /help'
    else
      @connection.send_message(line)
  end
end

#quit ⇒ Object 



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# File 'lib/jschat/client.rb', line 586

def quit
  Ncurses.endwin
  exit
end

#receive_data(data) ⇒ Object 



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# File 'lib/jschat/client.rb', line 463

def receive_data(data)
  @clipboard ||= ''
  c = data[0]

  if arrow_keys data
    return
  end

  if c != Ncurses::KEY_TAB
    @tab_completion.reset
  end

  case c
    when -1
      # Return
    when Ncurses::KEY_TAB
      @tab_completion.run @connection.names, @input_field, @input_form, cursor_position
    when Ncurses::KEY_ENTER, ?\n, ?\r
      @input_form.form_driver Ncurses::Form::REQ_BEG_LINE
      line = @input_field.field_buffer(0)
      line.rstrip!

      if !line.empty? and line.length > 0
        @history << line.dup
        @history_position = @history.size
        manage_commands line
      end
      @input_form.form_driver Ncurses::Form::REQ_CLR_FIELD
    when ?\C-l
      # Refresh
      resize
    when Ncurses::KEY_BACKSPACE, ?\C-h, 127
      # Backspace
      @input_form.form_driver Ncurses::Form::REQ_DEL_PREV
      @input_form.form_driver Ncurses::Form::REQ_CLR_EOL
    when ?\C-d
      @input_form.form_driver Ncurses::Form::REQ_DEL_CHAR
    when Ncurses::KEY_LEFT, ?\C-b
      @input_form.form_driver Ncurses::Form::REQ_PREV_CHAR
    when Ncurses::KEY_RIGHT, ?\C-f
      @input_form.form_driver Ncurses::Form::REQ_NEXT_CHAR
    when ?\C-a
      @input_form.form_driver Ncurses::Form::REQ_BEG_LINE
    when ?\C-e
      @input_form.form_driver Ncurses::Form::REQ_END_LINE
    when ?\C-k
      @input_form.form_driver Ncurses::Form::REQ_CLR_EOL
    when ?\C-u
      @input_form.form_driver Ncurses::Form::REQ_BEG_LINE
      @clipboard = @input_field.field_buffer(0)
      @input_form.form_driver Ncurses::Form::REQ_CLR_FIELD
    when ?\C-y
      unless @clipboard.empty?
        cursor_position = Ncurses.getcurx(@windows[:input])
        
        text = @input_field.field_buffer(0).insert(cursor_position - 9, @clipboard)
        @input_field.set_field_buffer(0, text)
        
        @windows[:text].addstr "#{cursor_position}\n #{text}"
        @windows[:text].refresh
      end
    when ?\C-c
      quit
    when ?\C-w
      @input_form.form_driver Ncurses::Form::REQ_PREV_CHAR
      @input_form.form_driver Ncurses::Form::REQ_DEL_WORD
    else
      @input_form.form_driver c
  end
  @windows[:input].refresh
end

#remove_forms ⇒ Object 



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# File 'lib/jschat/client.rb', line 307

def remove_forms
  @input_field.free_field
  @input_form.free_form
end

#remove_windows ⇒ Object 



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# File 'lib/jschat/client.rb', line 301

def remove_windows
  @windows.each do |name, window|
    window.delete
  end
end

#remove_windows_and_forms ⇒ Object 



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# File 'lib/jschat/client.rb', line 296

def remove_windows_and_forms
  remove_windows
  remove_forms
end

#resize ⇒ Object 



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# File 'lib/jschat/client.rb', line 361

def resize
  # Save the user input
  @input_form.form_driver Ncurses::Form::REQ_BEG_LINE
  input = @input_field.field_buffer(0)
  input.rstrip!

  Ncurses.def_prog_mode
  Ncurses.endwin
  Ncurses.reset_prog_mode

  update_windows

  cols = get_window_size[0]
  if @lastlog.size > 0
    lastlog_start = cols > @lastlog.size ? @lastlog.size : cols
    @lastlog[-lastlog_start..-1].each do |message|
      display_text message[0], message[1]
    end
  end

  @input_field.set_field_buffer(0, input)
  @windows[:input].addstr input
  @input_form.form_driver Ncurses::Form::REQ_END_LINE

  Ncurses.refresh
rescue Exception => exception
  puts exception
end

#room_name=(room_name) ⇒ Object 



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# File 'lib/jschat/client.rb', line 275

def room_name=(room_name)
  @room_name = room_name 
end

#setup_screen ⇒ Object 



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# File 'lib/jschat/client.rb', line 253

def setup_screen
  Ncurses.initscr
  @windows = {}
  
  Ncurses.raw
  Ncurses.start_color
  Ncurses.noecho
  Ncurses.use_default_colors
  Ncurses.init_pair 2, Ncurses::COLOR_WHITE, Ncurses::COLOR_BLUE
  Ncurses.init_pair 3, Ncurses::COLOR_CYAN, -1
  Ncurses.init_pair 4, Ncurses::COLOR_YELLOW, -1
  Ncurses.init_pair 5, Ncurses::COLOR_BLACK, -1
  Ncurses.init_pair 6, Ncurses::COLOR_RED, -1

  @history_position = 0
  @history = []
  @lastlog = []
  @room_name = ''

  setup_windows
end

#setup_windows ⇒ Object 



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# File 'lib/jschat/client.rb', line 279

def setup_windows
  Ncurses.refresh

  display_windows

  Thread.new do
    loop do
      display_time
      sleep 60 - Time.now.sec
    end
  end

  Signal.trap('SIGWINCH') do
    resize
  end
end

#show_message(messages, time = Time.now.localtime) ⇒ Object 



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# File 'lib/jschat/client.rb', line 535

def show_message(messages, time = Time.now.localtime)
  messages.split("\n").each do |message|
    @lastlog << [message.dup, time]
    @lastlog.shift if @lastlog.size > 250
    display_text message, time
  end
end

#strip_command(line) ⇒ Object 



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# File 'lib/jschat/client.rb', line 647

def strip_command(line)
  matches = line.match(%r{/[a-zA-Z][^ ]*(.*)})
  if matches
    matches[1].strip
  else
    line
  end
end

#update_windows ⇒ Object 



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# File 'lib/jschat/client.rb', line 312

def update_windows
  rows, cols = get_window_size
  remove_windows_and_forms
  display_windows
  display_room_name
end