Class: Deletes

Inherits:
Object show all
Defined in:
lib/xiki/deletes.rb

Class Method Summary collapse

Class Method Details

.backward ⇒ Object 



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# File 'lib/xiki/deletes.rb', line 52

def self.backward
  prefix = Keys.prefix
  case prefix
  when :u
    $el.backward_kill_word 1
  when :uu
    $el.backward_kill_word 2
  when :uuu
    $el.backward_kill_word 3
  else
    $el.delete_backward_char(prefix || 1)
  end
end

.delete_whitespace ⇒ Object 



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# File 'lib/xiki/deletes.rb', line 2

def self.delete_whitespace

  prefix = Keys.prefix(:clear=>true)   # Number prefix means add that many lines after deleting

  if prefix == :u   # If U, remove whitespace within region
    txt = View.selection :delete=>true
    linebreak_on_end = txt[/\n\z/]
    txt.gsub! /^ *[+-] /, ''
    txt.gsub! /[\n\t ]/, ''
    View.insert("#{txt}#{linebreak_on_end}", :dont_move=>true)
    return
  end

  # If at end of line, go forward, and remember to delete backward
  was_blank = Line.blank?
  was_at_end = (Line.at_right? and (! was_blank))
  was_at_beginning = (Line.at_left? and (! was_blank))
  if was_blank  # If blank, stay on line
    # Do nothing
  elsif was_at_end
    $el.forward_char
  elsif was_at_beginning and not View.char =~ /\s/
    $el.backward_char
  else   # If not at end of a line, simply delete horizontal
    $el.delete_horizontal_space
    View.insert(" " * prefix) if prefix
    return
  end

  # Delete any blank lines
  $el.delete_blank_lines if Line.blank?
  $el.delete_char(1) if Line.blank?   # Delete line if left

  Deletes.backward if was_at_end
  if was_at_beginning
    Deletes.backward if Line.at_left?
    $el.delete_char(1) if Line.at_right?
  end
  if was_blank
    if prefix
      View.insert("\n" * prefix)
      Move.backward prefix
    end
  else
    $el.delete_horizontal_space
    View.insert(" " * prefix) if prefix
  end
end