Class: Yast::LogViewClass

Inherits:
Module
  • Object
show all
Defined in:
library/log/src/modules/LogView.rb

Instance Method Summary collapse

Instance Method Details

#AdvancedHelp(label) ⇒ String

Get the second part of the help for the log in case of advanced functions

Parameters:

  • label (String)

    tge label of the menu button

Returns:

  • (String)

    part of the log


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# File 'library/log/src/modules/LogView.rb', line 140

def AdvancedHelp(label)
  # help for the log widget, part 2, alt. 2, %1 is a menu button label
  Builtins.sformat(
    _(
      "<p>\n" \
        "To process advanced actions, click <b>%1</b>\n" \
        "and select the action to process.</p>"
    ),
    label
  )
end

#AdvancedSaveHelp(label) ⇒ String

Get the second part of the help for the log in case of advanced functions and save support

Parameters:

  • label (String)

    tge label of the menu button

Returns:

  • (String)

    part of the log


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# File 'library/log/src/modules/LogView.rb', line 125

def AdvancedSaveHelp(label)
  # help for the log widget, part 2, alt. 1, %1 is a menu button label
  Builtins.sformat(
    _(
      "<p>\n" \
        "To process advanced actions or save the log into a file, click <b>%1</b>\n" \
        "and select the action to process.</p>"
    ),
    label
  )
end

#CreateHelp(logs, parameters) ⇒ String

Get the help of the widget

Parameters:

  • logs (Fixnum)

    integer count of displayed logs

  • parameters (Hash)

    map parameters of the log to display

Returns:

  • (String)

    help to the widget


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# File 'library/log/src/modules/LogView.rb', line 167

def CreateHelp(logs, parameters)
  parameters = deep_copy(parameters)
  help = Ops.get_string(parameters, "help", "")
  return help if help != "" && !help.nil?

  adv_button = Ops.get_string(parameters, "mb_label", "")
  if adv_button == "" || adv_button.nil?    # menu button

    adv_button = _("Ad&vanced")
  end

  adv_button = Builtins.regexpsub(adv_button, "^(.*)&(.*)$", "\\1\\2") if Builtins.regexpmatch(adv_button, "^.*&.*$")

  save = Ops.get_boolean(parameters, "save", false)
  save = false if save.nil?

  actions_lst = Ops.get_list(parameters, "actions", [])
  actions_lst = [] if actions_lst.nil?
  actions = Builtins.size(actions_lst)

  actions = Ops.add(actions, 1) if save

  if Ops.greater_than(logs, 1)
    help = LogSelectionHelp()
  elsif Ops.greater_or_equal(actions, 1) || save
    help = SingleLogHelp()
  else
    return ""
  end

  if Ops.greater_or_equal(actions, 2)
    help = if save
      Ops.add(help, AdvancedSaveHelp(adv_button))
    else
      Ops.add(help, AdvancedHelp(adv_button))
    end
  elsif save
    help = Ops.add(help, SaveHelp())
  end

  help
end

#CreateWidget(parameters, log_files) ⇒ Hash

Get the map with the log view widget


 - "save" -- boolean, if true, then log saving is possible
 - "actions" -- list, allows to specify additional actions.
                Each member is a 2- or 3-entry list, first entry is a
                label for the menubutton, the second one is a function
                that will be called when the entry is selected,
                the signature of the function must be void(),
     optional 3rd argument, if set to true, forces
     restarting of the log displaying command after the
     action is performed
 - "mb_label" -- string, label of the menubutton, if not specified,
                 then "Advanced" is used
 - "max_lines" -- integer, maximum of lines to be displayed. If 0,
                  then display whole file. Default is 100.
 - "help" -- string for a rich text, help to be offered via a popup
             when user clicks the "Help" button. If not present,
             default help is shown or Help button is hidden.
- "widget_height" -- height of the LogView widget, to be adjusted
                     so that the widget fits into the dialog well.
                     Test it to find the best value, 15 seems to be
                     good value (is default if not specified)

 - "file" -- string, filename with the log
 - "grep" -- string, basic regular expression to be grepped
             in the log (for getting relevant  parts of
             /var/log/messages. If empty or not present, whole file
             is used
 - "command" -- allows to specify comand to get the log for cases
                where grep isn't enough. If used, file and grep entries
                are ignored
 - "log_label" -- header of the LogView widget, if not set, then the file
                  name or the command is used
 - "default" -- define and set to true to make this log be active after
                widget is displayed. If not defiend for any log, the
                first log is automatically default. If defined for multiple
                logs, the first one is active

Parameters:

  • parameters (Hash{String => Object})

    map parameters of the widget to be created, will be unioned with the generated map

  • log_files (Array<Hash{String => Object>})

    a list of logs that will be displayed

Returns:

  • (Hash)

    the log widget


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# File 'library/log/src/modules/LogView.rb', line 456

def CreateWidget(parameters, log_files)
  parameters = deep_copy(parameters)
  log_files = deep_copy(log_files)  # logview caption

  caption = Ops.get_locale(@param, "log_label", _("&Log"))
  height = Ops.get_integer(@param, "widget_height", 15)

  default_index = GetDefaultItemForLogsCombo(log_files)
  top_bar = GetLogSelectionCombo(log_files)
  bottom_bar = GetButtonsBelowLog(false, parameters, log_files)

  Builtins.union(
    {
      "widget"              => :custom,
      "custom_widget"       => VBox(
        top_bar,
        ReplacePoint(
          Id(:_cwm_log_rp),
          LogView(Id(:_cwm_log), caption, height, 0)
        ),
        bottom_bar
      ),
      "init"                => fun_ref(method(:LogInit), "void (string)"),
      "handle"              => fun_ref(
        method(:LogHandle),
        "symbol (string, map)"
      ),
      "cleanup"             => fun_ref(
        method(:KillBackgroundProcess),
        "void (string)"
      ),
      "ui_timeout"          => 1000,
      "_cwm_default_index"  => default_index,
      "_cwm_log_files"      => log_files,
      "_cwm_button_actions" => [],
      "help"                => CreateHelp(
        Builtins.size(log_files),
        parameters
      )
    },
    parameters
  )
end

#Display(parameters) ⇒ Object

Main function for displaying logs


 - "file" -- string, filename with the log
 - "grep" -- string, basic regular expression to be grepped
             in the log (for getting relevant  parts of
             /var/log/messages. If empty or not present, whole file
             is used
 - "command" -- allows to specify command to get the log for cases
                where grep isn't enough. If used, file and grep entries
                are ignored
 - "save" -- boolean, if true, then log saving is possible
 - "actions" -- list, allows to specify additional actions.
                Each member is a 2- or 3-entry list, first entry is a
                label for the menubutton, the second one is a function
                that will be called when the entry is selected,
                the signature of the function must be void(),
     optional 3rd argument, if set to true, forces
     restarting of the log displaying command after the
     action is performed
 - "help" -- string for a rich text, help to be offered via a popup
             when user clicks the "Help" button. If not present,
             Help button isn't shown
 - "mb_label" -- string, label of the menubutton, if not specified,
                 then "Advanced" is used
 - "max_lines" -- integer, maximum of lines to be displayed. If 0,
                  then display whole file. Default is 100.
 - "log_label" -- header of the LogView widget, if not set, then "Log"
                  is used

Parameters:

  • parameters (Hash{String => Object})

    map description of parameters, with following keys


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# File 'library/log/src/modules/LogView.rb', line 532

def Display(parameters)
  parameters = deep_copy(parameters)
  @param = deep_copy(parameters)

  # menubutton
  log_label = Ops.get_locale(@param, "log_label", _("&Log"))

  @logs = [@param]

  button_line = GetButtonsBelowLog(true, @param, [@param])

  UI.OpenDialog(
    HBox(
      HSpacing(1),
      VBox(
        VSpacing(1),
        HSpacing(70),
        # log view header
        LogView(Id(:_cwm_log), log_label, 19, 0),
        VSpacing(1),
        button_line,
        VSpacing(1)
      ),
      HSpacing(1)
    )
  )

  UI.ReplaceWidget(Id(:rep_left), PushButton(Id(:help), Label.HelpButton)) if Ops.get_string(@param, "help", "") != ""
  @mb_actions = Ops.get_list(@param, "actions", [])

  InitLogReading(0)

  ret = nil
  while ret != :close && ret != :cancel
    event = UI.WaitForEvent(1000)
    ret = Ops.get(event, "ID")
    if ret == :help
      UI.OpenDialog(
        VBox(
          RichText(Id(:help_text), Ops.get_string(@param, "help", "")),
          HBox(
            HStretch(),
            PushButton(Id(:close), Label.CloseButton),
            HStretch()
          )
        )
      )
      ret = UI.UserInput while ret != :close && ret != :cancel
      ret = nil
      UI.CloseDialog
    else
      LogHandle("", event)
    end
  end
  LogViewCore.Stop
  UI.CloseDialog
  nil
end

#DisplayFiltered(file, grep) ⇒ Object

Display log with filtering with 100 lines

Parameters:

  • file (String)

    string filename of file with the log

  • grep (String)

    string basic regular expression to be grepped in file


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# File 'library/log/src/modules/LogView.rb', line 602

def DisplayFiltered(file, grep)
  Display("file" => file, "grep" => grep)

  nil
end

#DisplaySimple(file) ⇒ Object

Display specified file, list 100 lines

Parameters:

  • file (String)

    string filename of file with the log


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# File 'library/log/src/modules/LogView.rb', line 593

def DisplaySimple(file)
  Display("file" => file)

  nil
end

#GetButtonsBelowLog(popup, glob_param, _log_maps) ⇒ Yast::Term

Get the buttons below the box with the log

Parameters:

  • popup (Boolean)

    boolean true if running in popup (and Close is needed)

  • glob_param (Hash{String => Object})

    a map of global parameters of the log widget

  • log_maps (Array<Hash{String => Object>})

    a list of maps describing all the logs

Returns:

  • (Yast::Term)

    the widget with buttons


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# File 'library/log/src/modules/LogView.rb', line 289

def GetButtonsBelowLog(popup, glob_param, _log_maps)
  glob_param = deep_copy(glob_param)
  left = Empty()
  center = Empty()

  if popup
    center = PushButton(Id(:close), Opt(:key_F9), Label.CloseButton)

    if Builtins.haskey(glob_param, "help") &&
        Ops.get_string(glob_param, "help", "") != ""
      left = PushButton(Id(:help), Label.HelpButton)
    end
  end

  save = Ops.get_boolean(glob_param, "save", false)
  mb_label = Ops.get_locale(glob_param, "mb_label", _("Ad&vanced"))
  actions = Ops.get_list(glob_param, "actions", [])
  right = GetMenuButtonWidget(actions, save, mb_label)

  HBox(
    HWeight(1, left),
    HStretch(),
    HWeight(1, center),
    HStretch(),
    HWeight(1, right)
  )
end

#GetDefaultItemForLogsCombo(log_maps) ⇒ Fixnum

Get the default entry for the combo box with logs

Parameters:

  • log_maps (Array<Hash{String => Object>})

    a list of maps describing all the logs

Returns:

  • (Fixnum)

    the index of the default entry in the combo box


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# File 'library/log/src/modules/LogView.rb', line 320

def GetDefaultItemForLogsCombo(log_maps)
  log_maps = deep_copy(log_maps)
  default_log = 0
  if Ops.greater_than(Builtins.size(log_maps), 0)
    index = -1
    Builtins.foreach(log_maps) do |m|
      index = Ops.add(index, 1)
      default_log = index if Builtins.haskey(m, "default") && default_log == 0
    end
  end
  default_log
end

#GetLogSelectionCombo(log_maps) ⇒ Yast::Term

Get the combo box of the available log files

Parameters:

  • log_maps (Array<Hash{String => Object>})

    a list of maps describing all the logs

Returns:

  • (Yast::Term)

    the combo box widget


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# File 'library/log/src/modules/LogView.rb', line 213

def GetLogSelectionCombo(log_maps)
  log_maps = deep_copy(log_maps)
  selection_combo = Empty()
  if Ops.greater_than(Builtins.size(log_maps), 0)
    index = -1
    items = Builtins.maplist(log_maps) do |m|
      index = Ops.add(index, 1)
      Item(
        Id(index),
        Ops.get_locale(
          # combo box entry (only used as fallback in case
          # of error in the YaST code)
          m,
          "log_label",
          Ops.get_locale(m, "command", Ops.get_locale(m, "file", _("Log")))
        )
      )
    end
    selection_combo = ComboBox(
      Id(:cwm_log_files),
      Opt(:notify, :hstretch),
      _("&Log"),
      items
    )
  end
  deep_copy(selection_combo)
end

#GetMenuButtonWidget(actions, save, mb_label) ⇒ Yast::Term

Get the widget with the menu button with actions to be processed on the log

Parameters:

  • actions (Array<Array>)

    a list of all actions

  • save (Boolean)

    boolean true if the log should be offered to be saved

  • mb_label (String)

    label of the menu button, may be empty for default

Returns:

  • (Yast::Term)

    widget with the menu button


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# File 'library/log/src/modules/LogView.rb', line 246

def GetMenuButtonWidget(actions, save, mb_label)
  actions = deep_copy(actions)
  menubutton = []
  if save    # menubutton entry

    menubutton = Builtins.add(menubutton, [:_cwm_log_save, _("&Save Log")])
  end

  if Ops.greater_than(Builtins.size(actions), 0)
    index = 0
    Builtins.foreach(actions) do |a|
      menubutton = Builtins.add(
        menubutton,
        [index, Ops.get_string(a, 0, "")]
      )
      index = Ops.add(index, 1)
    end
  end

  if Ops.greater_than(Builtins.size(menubutton), 1)
    menubutton = Builtins.filter(menubutton) do |m|
      m.is_a?(Array) && m.first
    end
    menubutton = Builtins.maplist(menubutton) do |m|
      ml = Convert.to_list(m)
      Item(Id(Ops.get(ml, 0)), Ops.get_string(ml, 1, ""))
    end
    mb_label = _("Ad&vanced") if mb_label == "" || mb_label.nil?
    return MenuButton(Id(:_cwm_log_menu), mb_label, menubutton)
  elsif Builtins.size(menubutton) == 1
    return PushButton(
      Id(Ops.get(menubutton, [0, 0], "")),
      Ops.get_string(menubutton, [0, 1], "")
    )
  end
  Empty()
end

#Index2Descr(index) ⇒ Object

Get the map describing the particular log file from its index

Parameters:

  • index (Fixnum)

    integer index of the log file

Returns:

  • a map describing the log file


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# File 'library/log/src/modules/LogView.rb', line 82

def Index2Descr(index)
  Ops.get(@logs, index, {})
end

#InitLogReading(index) ⇒ Object

Starts the log reading command via process agent

Parameters:

  • index (Fixnum)

    integer the index of the log file


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# File 'library/log/src/modules/LogView.rb', line 88

def InitLogReading(index)
  log_descr = Index2Descr(index)
  LogViewCore.Start(Id(:_cwm_log), log_descr)

  nil
end

#KillBackgroundProcess(_key) ⇒ Object

Kill processes running on the backgrouns

Parameters:

  • key (String)

    log widget key


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# File 'library/log/src/modules/LogView.rb', line 97

def KillBackgroundProcess(_key)
  LogViewCore.Stop

  nil
end

#LogHandle(_key, event) ⇒ Symbol

Handle the event on the log view widget

Parameters:

  • key (String)

    log widget key

  • event (Hash)

    map event to handle

Returns:

  • (Symbol)

    always nil


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# File 'library/log/src/modules/LogView.rb', line 371

def LogHandle(_key, event)
  event = deep_copy(event)
  @param = CWM.GetProcessedWidget
  LogViewCore.Update(Id(:_cwm_log))
  ret = Ops.get(event, "ID")  # save the displayed log to file

  if ret == :_cwm_log_save
    filename = UI.AskForSaveFileName(
      # popup caption, save into home directory by default (bnc#653601)
      "~",
      "*.log",
      _("Save Log as...")
    )
    if !filename.nil?
      SCR.Write(
        path(".target.string"),
        filename,
        Ops.add(Builtins.mergestring(LogViewCore.GetLines, "\n"), "\n")
      )
    end  # other operation specified by user

  elsif !ret.nil? && Ops.is_integer?(ret)
    iret = Convert.to_integer(ret)
    func = Convert.convert(
      Ops.get(@mb_actions, [iret, 1]),
      from: "any",
      to:   "void ()"
    )
    func&.call
    if Ops.get(@mb_actions, [iret, 2]) == true
      KillBackgroundProcess(nil)
      UI.ChangeWidget(Id(:_cwm_log), :Value, "")
      InitLogReading(@current_index)
    end  # switch displayed log file

  elsif ret == :cwm_log_files
    index = Convert.to_integer(UI.QueryWidget(Id(:cwm_log_files), :Value))
    LogSwitch(index)
  end
  nil
end

#LogInit(_key) ⇒ Object

Initialize the displayed log

Parameters:

  • key (String)

    log widget key

  • key (String)

    table widget key


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# File 'library/log/src/modules/LogView.rb', line 356

def LogInit(_key)
  @param = CWM.GetProcessedWidget
  @current_index = Ops.get_integer(@param, "_cwm_default_index", 0)
  @mb_actions = Ops.get_list(@param, "_cwm_button_actions", [])
  @logs = Ops.get_list(@param, "_cwm_log_files", [])
  UI.ChangeWidget(Id(:cwm_log_files), :value, @current_index) if UI.WidgetExists(Id(:cwm_log_files))
  LogSwitch(@current_index)

  nil
end

#LogSelectionHelpString

Get the help for the log in case of multiple logs

Returns:

  • (String)

    part of the log


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# File 'library/log/src/modules/LogView.rb', line 105

def LogSelectionHelp  # help for the log widget, part 1, alt. 1

  _(
    "<p><b><big>Displayed Log</big></b><br>\n" \
      "Use <b>Log</b> to select the log to display. It will be displayed in\n" \
      "the field below.</p>\n"
  )
end

#LogSwitch(index) ⇒ Object

Switch the displayed log

Parameters:

  • index (Fixnum)

    integer index of the log to display


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# File 'library/log/src/modules/LogView.rb', line 335

def LogSwitch(index)
  @current_index = index

  log_descr = Index2Descr(index)  # logview caption

  caption = Ops.get_locale(
    log_descr,
    "log_label",
    Ops.get_locale(@param, "log_label", _("&Log"))
  )

  UI.ReplaceWidget(:_cwm_log_rp, LogView(Id(:_cwm_log), caption, 15, 0))

  InitLogReading(index)

  nil
end

#mainObject


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# File 'library/log/src/modules/LogView.rb', line 50

def main
  Yast.import "UI"
  textdomain "base"

  Yast.import "CWM"
  Yast.import "Popup"
  Yast.import "Label"
  Yast.import "Report"
  Yast.import "LogViewCore"

  # fallback settings variables

  # configuration variables

  # global parameters for the log displaying widget
  @param = {}

  # list of all the logs that can be displayed
  @logs = []

  # index of currently selected log
  @current_index = 0

  # list of actions that can be processed on the logs
  @mb_actions = []
end

#SaveHelpString

Get the second part of the help for the log in case of save support

Returns:

  • (String)

    part of the log


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# File 'library/log/src/modules/LogView.rb', line 154

def SaveHelp  # help for the log widget, part 2, alt. 3

  _(
    "<p>\n" \
      "To save the log into a file, click <b>Save Log</b> and select the file\n" \
      "to which to save the log.</p>\n"
  )
end

#SingleLogHelpString

Get the help for the log in case of a single log

Returns:

  • (String)

    part of the log


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# File 'library/log/src/modules/LogView.rb', line 116

def SingleLogHelp  # help for the log widget, part 1, alt. 2

  _("<p><b><big>The Log</big></b><br>\nThis screen displays the log.</p>")
end