Class: Textbringer::EchoArea

Inherits:

Window

• Object
• Window
• Textbringer::EchoArea

Defined in:

lib/textbringer/window.rb,
sig/lib/textbringer/window.rbs

Constant Summary

Constants inherited from Window

Window::ALT_ALPHA_BASE, Window::ALT_NUMBER_BASE, Window::FALLBACK_CHARACTERS, Window::HAVE_GET_KEY_MODIFIERS, Window::KEY_NAMES

Instance Attribute Summary

• #active ⇒ Object writeonly

  Sets the attribute active.

• #message ⇒ Object readonly

  Returns the value of attribute message.

• #prompt ⇒ Object

  Returns the value of attribute prompt.

Attributes inherited from Window

#bottom_of_window, #buffer, #columns, #cursor, #lines, #mode_line, #top_of_window, #window, #x, #y

Instance Method Summary

• #active? ⇒ Boolean
• #clear ⇒ String
• #clear_message ⇒ nil
• #echo_area? ⇒ Boolean
• #editable_columns ⇒ Integer
• #escape(s) ⇒ String
• #framer ⇒ Integer
• #initialize(*args) ⇒ EchoArea constructor

  A new instance of EchoArea.

• #initialize_window(num_lines, num_columns, y, x) ⇒ void
• #move(y, x) ⇒ Integer
• #redisplay ⇒ nil
• #redraw ⇒ nil
• #resize(lines, columns) ⇒ Integer
• #show(message) ⇒ String

Methods inherited from Window

beep, #beginning_of_line_and_count, #calc_tab_width, #close, colors, columns, #compose_character, #compose_hangul_character, current, current=, #current?, #current_or_minibuffer_selected?, #delete, #delete_marks, delete_other_windows, delete_window, #deleted?, echo_area, #enlarge, #get_char, has_colors=, has_colors?, #has_input?, #highlight, #isearch_attr, lines, list, load_faces, minibuffer_selected, minibuffer_selected=, other_window, #read_event, #read_event_nonblock, #recenter, #recenter_if_needed, redisplay, #redisplay_mode_line, redraw, #region_attr, resize, #restore_point, #save_point, #scroll_down, #scroll_up, set_default_colors, #shrink, #shrink_if_larger_than_buffer, #split, start, #unicode_codepoint, update, #update_cursor_and_attr, #wait_input

Constructor Details

#initialize(*args) ⇒ EchoArea

Returns a new instance of EchoArea.

Parameters:

• (Integer)

# File 'lib/textbringer/window.rb', line 993

def initialize(*args)
  super
  @message = nil
  @prompt = ""
  @active = false
end

Instance Attribute Details

#active=(value) ⇒ Object (writeonly)

Sets the attribute active

Parameters:

• value —

  the value to set the attribute active to.

# File 'lib/textbringer/window.rb', line 991

def active=(value)
  @active = value
end

#message ⇒ Object (readonly)

Returns the value of attribute message.

# File 'lib/textbringer/window.rb', line 989

def message
  @message
end

#prompt ⇒ Object

Returns the value of attribute prompt.

# File 'lib/textbringer/window.rb', line 990

def prompt
  @prompt
end

Instance Method Details

#active? ⇒ Boolean

Returns:

• (Boolean)

# File 'lib/textbringer/window.rb', line 1004

def active?
  @active
end

#clear ⇒ String

Returns:

• (String)

# File 'lib/textbringer/window.rb', line 1008

def clear
  @buffer.clear
  @top_of_window.location = @buffer.point_min
  @message = nil
  @prompt = ""
end

#clear_message ⇒ nil

Returns:

• (nil)

# File 'lib/textbringer/window.rb', line 1015

def clear_message
  @message = nil
end

#echo_area? ⇒ Boolean

Returns:

• (Boolean)

# File 'lib/textbringer/window.rb', line 1000

def echo_area?
  true
end

#editable_columns ⇒ Integer

Returns:

• (Integer)

# File 'lib/textbringer/window.rb', line 1089

def editable_columns
  if @buffer.input_method_status == "--"
    @columns
  else
    @columns - Buffer.display_width(@buffer.input_method_status) - 1
  end
end

#escape(s) ⇒ String

Parameters:

• (String)

Returns:

• (String)

# File 'lib/textbringer/window.rb', line 1103

def escape(s)
  super(s).gsub(/\t/, "^I")
end

#framer ⇒ Integer

Returns:

• (Integer)

# File 'lib/textbringer/window.rb', line 1107

def framer
  @buffer.save_point do |saved|
    max_width = editable_columns - @window.curx
    width = 0
    loop do
      c = @buffer.char_after
      if c.nil?
        width += 1
      else
        width += Buffer.display_width(escape(c))
      end
      if width > max_width
        @buffer.forward_char
        break
      elsif width == max_width || @buffer.beginning_of_line? ||
          @buffer.point_at_mark?(@top_of_window)
        break
      end
      @buffer.backward_char
    end
    @top_of_window.location = @buffer.point
  end
end

#initialize_window(num_lines, num_columns, y, x) ⇒ void

This method returns an undefined value.

Parameters:

• (Integer)
• (Integer)
• (Integer)
• (Integer)

# File 'lib/textbringer/window.rb', line 1099

def initialize_window(num_lines, num_columns, y, x)
  @window = Curses::Window.new(num_lines, num_columns, y, x)
end

#move(y, x) ⇒ Integer

Parameters:

• (Integer)
• (Integer)

Returns:

• (Integer)

# File 'lib/textbringer/window.rb', line 1077

def move(y, x)
  @y = y
  @x = x
  @window.move(y, x)
end

#redisplay ⇒ nil

Returns:

• (nil)

# File 'lib/textbringer/window.rb', line 1023

def redisplay
  return if @buffer.nil?
  @buffer.save_point do |point|
    @window.erase
    if @buffer.input_method_status != "--"
      @window.setpos(@window.cury, editable_columns + 1)
      @window.addstr(@buffer.input_method_status)
    end
    @window.setpos(0, 0)
    default = Face[:default]
    @window.attr_set(default&.text_attrs || 0, default&.color_pair || 0)
    @in_region = false
    @in_isearch = false
    @current_hl_face = nil
    if @message
      @window.addstr(escape(@message))
    else
      prompt = escape(@prompt)
      @window.addstr(prompt)
      framer
      @buffer.point_to_mark(@top_of_window)
      @cursor.y = @cursor.x = 0
      while !@buffer.end_of_buffer?
        cury = @window.cury
        curx = @window.curx
        update_cursor_and_attr(point, cury, curx)
        c = @buffer.char_after
        if c == "\n"
          break
        end
        c = compose_character(point, cury, curx, c)
        s = escape(c)
        newx = curx + Buffer.display_width(s)
        if newx > editable_columns
          break
        end
        @window.addstr(s)
        @buffer.forward_char
        break if newx >= editable_columns
      end
      if @buffer.point_at_mark?(point)
        @cursor.y = @window.cury
        @cursor.x = @window.curx
      end
      @window.setpos(@cursor.y, @cursor.x)
    end
    @window.noutrefresh
  end
end

#redraw ⇒ nil

Returns:

• (nil)

# File 'lib/textbringer/window.rb', line 1073

def redraw
  @window.redraw
end

#resize(lines, columns) ⇒ Integer

Parameters:

• (Integer)
• (Integer)

Returns:

• (Integer)

# File 'lib/textbringer/window.rb', line 1083

def resize(lines, columns)
  @lines = lines
  @columns = columns
  @window.resize(lines, columns)
end

#show(message) ⇒ String

Parameters:

• (String)

Returns:

• (String)

# File 'lib/textbringer/window.rb', line 1019

def show(message)
  @message = message
end