small aesthetic changes to the redcar line numbers and annotations area

pretty_gutter.rb

# Run via Redcar menu > Plugins > Execute > Eval Current Tab (within Redcar)

include Redcar

def get_swt_color hex_value
  Swt::Graphics::Color.new(
    ApplicationSWT.display,
    hex_value[1,2].hex,
    hex_value[3,2].hex,
    hex_value[5,2].hex
  )
end

def style_tab tab
  bg_hex_value = tab.edit_view.controller.mate_text.colourer.theme.globalSettings.get('lineHighlight')
  fg_hex_value = tab.edit_view.controller.mate_text.colourer.theme.globalSettings.get('foreground')
  if bg_hex_value and fg_hex_value
    bg = get_swt_color(bg_hex_value)
    fg = get_swt_color(fg_hex_value)
    tab.controller.widget.children.first.background = bg
    tab.controller.widget.children.first.children[1].children.first.background = bg
    tab.edit_view.controller.mate_text.gutter_background = bg
    tab.edit_view.controller.mate_text.gutter_foreground = fg
  end

  font = Swt::Graphics::Font.new(ApplicationSWT.display, EditView.font, [EditView.font_size - 2,1].max, Swt::SWT::NORMAL)
  tab.edit_view.controller.mate_text.line_number_column.font = font
end

def configure(win)
  win.controller.shell.alpha = 255
  win.add_listener(:tab_focussed) do |tab|
    if tab.is_a? EditTab
      style_tab(tab)
    end
  end
  win.all_tabs.select {|tab| tab.is_a? EditTab }.each do |tab|
    style_tab(tab)
  end
end

Redcar.app.windows.each {|w| configure(w)}
Redcar.app.add_listener(:window_added) do |win|
  configure(win)
end