yast/yast-storage-ng

# Copyright (c) [2018] SUSE LLC
#
# All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of version 2 of the GNU General Public License 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, contact SUSE LLC.
#
# To contact SUSE LLC about this file by physical or electronic mail, you may
# find current contact information at www.suse.com.

require "y2partitioner/dialogs/popup"
require "y2partitioner/device_graphs"
require "y2partitioner/widgets/device_graph_with_buttons"
require "cwm/tabs"

module Y2Partitioner
  module Dialogs
    # A dialog for displaying the device graphs (both current and system) in
    # interfaces supporting the Graph widget (Qt). Don't use in NCurses.
    class DeviceGraph < Popup
      # Constructor
      def initialize
        super()
        textdomain "storage"
      end

      # Check if the current UI has the special widgets that this dialog needs
      def self.supported?
        Yast::UI.HasSpecialWidget(:Graph)
      end

      # @macro seeAbstractWidget
      def title
        _("Device Graphs")
      end

      def help
        tab_help(current_tab_label, current_tab_description) +
          tab_help(system_tab_label, system_tab_description)
      end

      # @macro seeCustomWidget
      def contents
        return @contents if @contents

        @tabs = CWM::Tabs.new(current_tab, system_tab)
        @contents = Top(Left(@tabs))
      end

      # @macro seeAbstractWidget
      def init
        # Start always in the first tab
        @tabs.switch_page(@tabs.initial_page)
      end

      def min_width
        74
      end

      def min_height
        22
      end

      def buttons
        [ok_button, help_button]
      end

      private

      # Tab displaying the current devicegraph with a brief explanation
      def current_tab
        DeviceGraphTab.new(
          current_tab_label,
          DeviceGraphs.instance.current,
          current_tab_description
        )
      end

      def current_tab_label
        # TRANSLATORS: label for a tab
        _("Planned Devices")
      end

      def current_tab_description
        # TRANSLATORS: keep lines relatively short. Use \n if needed
        _("Final result that will be committed to the system.\n" \
          "This graph is updated on every user action.")
      end

      # Tab displaying the system devicegraph with a brief explanation
      def system_tab
        DeviceGraphTab.new(
          system_tab_label,
          DeviceGraphs.instance.system,
          system_tab_description
        )
      end

      def system_tab_label
        # TRANSLATORS: label for a tab
        _("Current System Devices")
      end

      def system_tab_description
        # TRANSLATORS: keep lines relatively short. Use \n if needed
        _("Layout of the current system, before any of the scheduled changes.\n" \
          "This graph is created at startup. Updated if devices are rescanned.")
      end

      # Help text for a tab
      # @param tab_label [String]
      # @param tab_description [String]
      #
      def tab_help(tab_label, tab_description)
        "<p><b>" + tab_label + ":</b> " + tab_description + "</p>"
      end
    end

    # Class to represent every tab in the Device Graph page
    class DeviceGraphTab < CWM::Tab
      # @return [String]
      attr_reader :label

      # Constructor
      def initialize(label, device_graph, description)
        super()
        @label = label
        @device_graph = device_graph
        @widget_id = "#{widget_id}_#{device_graph.object_id}"
        @description = description
      end

      # @macro seeCustomWidget
      def contents
        return @contents if @contents

        @contents = VBox(
          Left(Label(description)),
          Widgets::DeviceGraphWithButtons.new(device_graph)
        )
      end

      private

      # @return [String] explanation to display above the graph
      attr_reader :description

      # @return [Devicegraph] graph to display
      attr_reader :device_graph
    end
  end
end