Class: Rumacs::Screen

Inherits:
Object
  • Object
show all
Defined in:
lib/rumacs/screen.rb,
lib/rumacs/screen/curses.rb

Defined Under Namespace

Classes: Backend

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Screen

Returns a new instance of Screen.



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# File 'lib/rumacs/screen.rb', line 14

def initialize()
  @rows = 0
  @cols = 0
  @point_row = 0
  @point_col = 0
  @window_row = 0
  @window_col = 0
  @lines = ['']
  @top_row = 0
  @backend = Rumacs::Screen::Backend.new(self)

  @selected_keys = ""
end

Instance Attribute Details

#backend ⇒ Object

Returns the value of attribute backend.



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# File 'lib/rumacs/screen.rb', line 12

def backend
  @backend
end

#cols ⇒ Object

Returns the value of attribute cols.



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# File 'lib/rumacs/screen.rb', line 7

def cols
  @cols
end

#lines ⇒ Object

Returns the value of attribute lines.



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# File 'lib/rumacs/screen.rb', line 10

def lines
  @lines
end

#point_col ⇒ Object

Returns the value of attribute point_col.



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# File 'lib/rumacs/screen.rb', line 8

def point_col
  @point_col
end

#point_row ⇒ Object

Returns the value of attribute point_row.



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# File 'lib/rumacs/screen.rb', line 8

def point_row
  @point_row
end

#rows ⇒ Object

Returns the value of attribute rows.



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# File 'lib/rumacs/screen.rb', line 7

def rows
  @rows
end

#top_row ⇒ Object

Returns the value of attribute top_row.



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# File 'lib/rumacs/screen.rb', line 11

def top_row
  @top_row
end

#window_col ⇒ Object

Returns the value of attribute window_col.



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# File 'lib/rumacs/screen.rb', line 9

def window_col
  @window_col
end

#window_row ⇒ Object

Returns the value of attribute window_row.



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# File 'lib/rumacs/screen.rb', line 9

def window_row
  @window_row
end

Instance Method Details

#call_key(c) ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 199

def call_key(c)
  call_key_in_table(c, $known_keys, lambda {|key| $filemgr.insert_character_at_point(key) })
end

#call_key_in_table(key, table, rescuer) ⇒ Object

This function is RECURSIVE! Do NOT refactor!



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# File 'lib/rumacs/screen.rb', line 181

def call_key_in_table(key, table, rescuer)
  if key.is_a? Symbol then
    if table.key?(key) then
      if table[key].is_a? Proc then
        table[key].call(self)
      elsif table[key].is_a? Symbol then
        call_key_in_table(table[key], table, rescuer)
      else
        raise Exception.new("unknown type of known_key in #{key}")
      end
    else
      unbound_key_warning(key)
    end
  else
    rescuer.call(key)
  end
end

#compound_key_c ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 211

def compound_key_c()
  @selected_keys += "C-c "
  minibuf(:notice, "#{@selected_keys}...") do
    call_key_in_table(@backend.next_character, $known_compound_c, lambda {|key| abort_command })
  end
  @selected_keys = ""
end

#compound_key_x ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 203

def compound_key_x()
  @selected_keys += "C-x "
  minibuf(:notice, "#{@selected_keys}...") do
    call_key_in_table(@backend.next_character, $known_compound_x, lambda {|key| abort_command })
  end
  @selected_keys = ""
end

#draw_lines ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 106

def draw_lines()
  (0..(@rows-2)).to_a.each do |i|
    @backend.draw_line(i, 0, @lines[@top_row+i])
  end
end

#init_screen ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 28

def init_screen()
  @backend.init_screen do
    status_line()
    yield
  end
end

#key_loop ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 219

def key_loop()
  loop do
    call_key(@backend.next_character)
  end
end

#kill_rumacs ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 35

def kill_rumacs()
  @backend.clean_exit
  exit 0
end

#minibuf(type, str) ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 118

def minibuf(type, str)
  if (type == :warning) || (type == :error) then
    @backend.notify
  end
  @backend.draw_line_mode(@rows - 1, 0, str, :minibuf)
  @backend.jump_to_point()
  @backend.redraw()
  yield
  @backend.draw_line_mode(@rows - 1, 0, " "*(@cols-1), :minibuf)
  @backend.jump_to_point()
  @backend.redraw()
end

#point_move(row_offset, col_offset) ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 40

def point_move(row_offset, col_offset)
  if (row_offset != 0) then
    shunt_row(row_offset)
  elsif (col_offset != 0) then
    shunt_col(col_offset)
  end

  status_line()
end

#point_set(row, col) ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 83

def point_set(row, col)
  if row === true then
    @point_row = @lines.size
  else
    @point_row = (row || @point_row)
  end

  if col === true then
    @point_col = (@lines[@point_row] || 0).size
  else
    @point_col = (col || @point_col)
  end

  @window_col = @point_col
  status_line()
end

#put_lines(lines) ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 100

def put_lines(lines)
  @lines = lines
  @lines.collect! {|line| line || ''}
  draw_lines
end

#shunt_col(col_offset) ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 65

def shunt_col(col_offset)
  prev_line_length = @lines[@point_row-1].size
  this_line_length = (@lines[@point_row] || '').size
  if (@point_col >= this_line_length) && (col_offset > 0) then
    col_offset = ((@point_col + col_offset) - this_line_length) - 1
    shunt_row( +1 )
    @point_col = col_offset
  elsif (@point_col <= 0) && (col_offset < 0) then
    shunt_row( -1 )
    col_offset = prev_line_length - (@point_col + col_offset + 1)
    @point_col = col_offset
  else
    @point_col += col_offset
  end

  @window_col = @point_col
end

#shunt_row(row_offset) ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 50

def shunt_row(row_offset)
  if (@point_row <= 0) && (row_offset < 0) then
    minibuf(:error, "Beginning of buffer") { sleep 1 }
  elsif (@point_row >= @lines.length) && (row_offset > 0) then
    minibuf(:error, "End of buffer") { sleep 1 }
  else
    @point_row += row_offset
    if @point_col > ((@lines[@point_row] || '').size) then
      @point_col = (@lines[@point_row] || '').size
    end
  end

  @window_row = @point_row
end

#status_line ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 112

def status_line()
  status_string = "- rumacs - [#{@point_row},(#{@point_col}/#{(@lines[@point_row] || '').size}) inside #{@top_row}..#{@top_row + @rows - 2}] (#{@rows}:#{@cols}:#{$$}) "
  @backend.draw_line_mode(@rows - 2, 0, status_string+("-" * (@cols - (status_string.size))), :statusbar)
  @backend.jump_to_point()
end

#unbound_key_warning(key) ⇒ Object 



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# File 'lib/rumacs/screen.rb', line 174

def unbound_key_warning(key)
  minibuf(:warning, "'#{key.to_s}' is undefined.") { sleep 1 }
end