view/ncurses/ncurses_modeline.rb

# ncurses_modeline.rb: the class definition of
# Edmaru::Ncurses::NcursesModeLine
#
# Copyright (C) 2007 Takashi Nakamoto
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA.
#

require "modeline.rb"

module Edmaru::Ncurses
  class NcursesModeLine
    include Edmaru::ModeLine

    #Nothing to do.
    def init_ui
    end

    #Construct the modeline instance.
    #This method create a new Ncurses::Window.
    #
    #=== Arguments
    #_x_ :: The left edge position in the window's parent view.
    #_y_ :: The right edge position in the window's parent view.
    #_col_ :: The column size allocated for this modeline.
    def init_ncurses_modeline(x, y, col)
      @col = col
      @allocated_window = Ncurses::newwin(1, col, y, x)

      #Set the default color of this modeline.
      @allocated_window.wattron(Ncurses::COLOR_PAIR(NcursesColor::MODELINE_PAIR))

      #Draw the modeline bar. (just fill it with space characters)
      @allocated_window.mvwaddstr(0, 0, " " * @col)
      @allocated_window.wrefresh
    end

    #Redraw thiw modeline.
    def refresh
      surface = ""

      @elements_order.each { |element_name|
        element = @elements[element_name]
        if element.visible?
          surface << element.surface

          #The length of the surface string is over the column size of
          #this modeline.
          if surface.size > @col
            break
          end
        end
      }

      if surface.size > @col
        surface = surface[0, @col]
      else
        surface << "-" * (@col - surface.size)
      end

      @allocated_window.mvwaddstr(0, 0, surface)
      @allocated_window.refresh
    end

    #Free allocated memory for this modeline.
    def terminate
      #Clear the window.
      @allocated_window.wattroff(Ncurses::COLOR_PAIR(NcursesColor::MODELINE_PAIR))
      @allocated_window.mvwaddstr(0, 0, " " * @col)
      @allocated_window.refresh
      
      #Free
      @allocated_window.delwin
    end
  end
end