Module: VER::Methods::SmartAutoindent

Defined in:
config/plugin/smart_autoindent.rb

Class Method Summary collapse

Class Method Details

.indent_settings(text) ⇒ Object 



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# File 'config/plugin/smart_autoindent.rb', line 117

def self.indent_settings(text)
  return {} unless text.load_preferences

  indent_settings = {}

  text.preferences.each do |pref|
    settings = pref[:settings]
    indent_settings[:increase]    ||= settings[:increaseIndentPattern]
    indent_settings[:decrease]    ||= settings[:decreaseIndentPattern]
    indent_settings[:indent_next] ||= settings[:indentNextLinePattern]
    indent_settings[:unindented]  ||= settings[:unIndentedLinePattern]
  end


  [:increase, :decrease, :indent_next, :unindented].each do |key|
    if value = indent_settings[key]
      indent_settings[key] = Regexp.new(value)
    else
      indent_settings.delete(key)
    end
  end

  return indent_settings
end

.indented_newline(text, record = text) ⇒ Object 



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# File 'config/plugin/smart_autoindent.rb', line 36

def self.indented_newline(text, record = text)
  settings = indent_settings(text)
  increase, decrease = settings.values_at(:increase, :decrease)
  unless increase || decrease
    record.insert :insert, "\n"
    return
  end

  ref_line = text.get(
    "insert - 1 lines linestart",
    "insert - 1 lines lineend"
  )
  ref = ref_line[/^\s*/].size / 2
  ref_inc = increase ? ref_line.scan(increase).size : 0
  ref_dec = decrease ? ref_line.scan(decrease).size : 0

  cur_line = text.get(
    "insert linestart",
    "insert lineend"
  )
  cur_inc = increase ? cur_line.scan(increase).size : 0
  cur_dec = decrease ? cur_line.scan(decrease).size : 0

  # we strip whitespace from previous empty lines, but it's still added to
  # the current one, so we use it as reference.
  if ref_line.empty?
    ref = cur_line[/^\s*/].size / 2
  end

  pattern = [
    if ref_inc != 0 && ref_dec != 0; '='
    elsif ref_inc != 0; '+'
    elsif ref_dec != 0; '-'
    else; '?'
    end,
    if cur_inc != 0 && cur_dec != 0; '='
    elsif cur_inc != 0; '+'
    elsif cur_dec != 0; '-'
    else; '?'
    end
  ].join

  cur_indent, next_indent =
    case pattern
    when '++'; [ref + 1, ref + 2]
    when '+-'; [ref,     ref]
    when '+='; [ref,     ref]
    when '+?'; [ref + 1, ref + 1]
    when '-+'; [ref,     ref]
    when '--'; [ref - 1, ref - 2]
    when '-='; [ref,     ref]
    when '-?'; [ref,     ref]
    when '=+'; [ref + 1, ref + 1]
    when '=-'; [ref,     ref]
    when '=='; [ref,     ref]
    when '=?'; [ref + 1, ref + 1]
    when '?+'; [ref,     ref + 1]
    when '?-'; [ref - 1, ref - 2]
    when '?='; [ref - 1, ref]
    when '??'; [ref,     ref]
    end

  if text.index('insert - 1 line') == text.index('insert')
    # first line, replace is futile
    next_indent -= 1
  elsif cur_line =~ /\S/
    cur_indent = [0, cur_indent].max
    record.replace(
      'insert linestart',
      'insert lineend',
      (' ' * (cur_indent * 2)) << cur_line.lstrip
    )
  else # that was an empty line
    record.replace('insert linestart', 'insert lineend', '')
  end

  next_indent = [0, next_indent].max

  record.insert('insert lineend', "\n#{' ' * (next_indent * 2)}")
end

.newline(text) ⇒ Object 



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# File 'config/plugin/smart_autoindent.rb', line 4

def self.newline(text)
  if text.options.autoindent
    indented_newline(text)
  else
    Insert.newline(text)
  end
end

.newline_above(text) ⇒ Object 



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# File 'config/plugin/smart_autoindent.rb', line 22

def self.newline_above(text)
  Undo.record text do |record|
    if text.index(:insert).y > 1
      Move.prev_line(text)
      newline_below(text)
    else
      record.insert('insert linestart', "\n")
      text.mark_set(:insert, 'insert - 1 line')
      Control.clean_line(text, 'insert - 1 line', record)
      text.minor_mode(:control, :insert)
    end
  end
end

.newline_below(text) ⇒ Object 



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# File 'config/plugin/smart_autoindent.rb', line 12

def self.newline_below(text)
  if text.options.autoindent
    text.mark_set('insert', 'insert lineend')
    newline(text)
    text.minor_mode(:control, :insert)
  else
    Insert.newline_below(text)
  end
end