Module: Yast::PrinterOverviewInclude

Defined in:
../../src/include/printer/overview.rb

Instance Method Summary (collapse)

Instance Method Details

- (Object) handleOverview(key, event)

handle function for add, edit and delete buttons, local and remote checkboxes, test button and refresh overview



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# File '../../src/include/printer/overview.rb', line 385

def handleOverview(key, event)
  event = deep_copy(event)
  Builtins.y2milestone(
    "entering handleOverview with key '%1'\nand event '%2'",
    key,
    event
  )
  # In the Overview dialog it does not make sense to have a button with "back" functionality
  # which is named "Cancel" according to the YaST Style Guide (dated Thu, 06 Nov 2008)
  # because there is nothing to "cancel" in the Overview dialog because it
  # only shows information about the current state of the configuration
  # but the Overview dialog itself does not do any change of the configuration.
  # The Overview dialog has actually the same meaning for the user
  # as a plain notification popup which has only a "OK" button.
  # If the user does not agree to what is shown in the Overview dialog
  # he must launch a configuration sub-dialog to change the configuration.
  # If the user accepted in such a configuration sub-dialog what he changed
  # via the "OK" button there, the change is applied and the Overview dialog
  # shows the new current state of the configuration, see
  # http://en.opensuse.org/Archive:YaST_Printer_redesign#Basic_Implementation_Principles:
  # so that it is not possible to "cancel" the change in the Overview dialog.
  # Any change of the configuration is done in sub-dialogs which are called
  # from the Overview dialog (even the "Confirm Deletion" popup is such a sub-dialog)
  # and in all those sub-dialogs there is a button with "cancel" functionality.
  # Note that all the different dialogs in the DialogTree (see dialogs.ycp) are
  # for the Wizard only different tabs of one same dialog (see "overview" in wizards.ycp)
  # so that the button with "back/cancel" functionality must be carefully re-enabled
  # whenever the Overview dialog is replaced by another dialog tab in the DialogTree
  # so that the other dialogs in the DialogTree have a button with "cancel" functionality.
  # In graphical mode:
  # When the Overview dialog is to be replaced by another dialog tab in the DialogTree
  # the event has the form e.g.: $["EventSerialNo":2, "EventType":"MenuEvent", "ID":"network"]
  # i.e. the EventType is "MenuEvent" so that testing only this general condition
  # (without a specific match if "ID" is one of "network","sharing","policies","autoconfig")
  # should be sufficiently safe to get the button with "back/cancel" functionality restored.
  # In ncurses mode:
  # When the Overview dialog is to be replaced by another dialog tab in the DialogTree
  # the event has the form e.g.: $["EventReason":"Activated", "EventSerialNo":0, "EventType":"WidgetEvent",
  #                                "ID":`wizardTree, "WidgetClass":`Tree, "WidgetID":`wizardTree]
  # The EventType "WidgetEvent" cannot be used here because it is too unspecific
  # because "WidgetEvent" type events are all kind of clicked buttons so that
  # for ncurses mode the ID is used as test if the Overview dialog is to be
  # replaced by another dialog tab in the DialogTree.
  # This strange testing method works at least for openSUSE 11.0 and openSUSE 11.1.
  Wizard.HideBackButton
  if "MenuEvent" == Ops.get_string(event, "EventType", "") ||
      :wizardTree == Ops.get(event, "ID")
    Wizard.RestoreBackButton
    # The above RestoreBackButton restores also its label to the default "Back"
    # but according to the YaST Style Guide (dated Thu, 06 Nov 2008)
    # this button is now named "Cancel":
    Wizard.SetBackButton(:back, Label.CancelButton)
  end

  if (:remote_content_checkbox == Ops.get(event, "ID") ||
      :local_content_checkbox == Ops.get(event, "ID")) &&
      "ValueChanged" == Ops.get_string(event, "EventReason", "")
    Builtins.y2milestone("Refreshing overview items")
    Printer.queue_filter_show_local = Convert.to_boolean(
      UI.QueryWidget(:local_content_checkbox, :Value)
    )
    Printer.queue_filter_show_remote = Convert.to_boolean(
      UI.QueryWidget(:remote_content_checkbox, :Value)
    )
    UI.ChangeWidget(
      :overview_table,
      :Items,
      Printer.QueueItems(
        Printer.queue_filter_show_local,
        Printer.queue_filter_show_remote
      )
    )
    # Try to preselect again the current_queue_name if it still exists in the overview_table:
    if Ops.greater_or_equal(Printer.selected_queues_index, 0)
      # because the Printer::QueueItems function sets Printer::selected_queues_index != -1
      # only if such an item exists in the overview_table so that this item can be preselected:
      Builtins.y2milestone(
        "Preselected queue: '%1'",
        Ops.get(Printer.queues, Printer.selected_queues_index, {})
      )
      UI.ChangeWidget(
        :overview_table,
        :CurrentItem,
        Id(Printer.selected_queues_index)
      )
    end
  end

  if :refresh == Ops.get(event, "ID") &&
      "Activated" == Ops.get_string(event, "EventReason", "")
    # For example when a client-only config is switched to a "get Browsing info" config
    # the BrowseInterval in cupsd.conf on remote CUPS servers is by default 30 seconds
    # so that it takes by default up to 31 seconds before the Overview dialog can show
    # all remote queues or any time longer depending on the BrowseInterval setting
    # on the remote CUPS servers which necessitates an explicite [Refresh] button.
    # Or the other way round when a "Get browsing info" config with a local cupsd
    # was switched to a "No browsing info" config with a local running cupsd.
    # The default BrowseTimeout value for the local cupsd is 5 minutes.
    # Therefore it takes by default 5 minutes until printer information
    # that was previously received by Browsing is removed (via timeout)
    # from the local cupsd's list so that such kind of outdated remote queues
    # are no longer shown in the Overview dialog.
    UI.ChangeWidget(
      :overview_table,
      :Items,
      Printer.QueueItems(
        Printer.queue_filter_show_local,
        Printer.queue_filter_show_remote
      )
    )
    # Try to preselect again the current_queue_name if it still exists in the overview_table:
    if Ops.greater_or_equal(Printer.selected_queues_index, 0)
      # because the Printer::QueueItems function sets Printer::selected_queues_index != -1
      # only if such an item exists in the overview_table so that this item can be preselected:
      Builtins.y2milestone(
        "Preselected queue: '%1'",
        Ops.get(Printer.queues, Printer.selected_queues_index, {})
      )
      UI.ChangeWidget(
        :overview_table,
        :CurrentItem,
        Id(Printer.selected_queues_index)
      )
    end
  end

  # After the above changes of the list of queues, determine which queue is currently selected
  # (because this might change via automated preselection when the table was made anew
  # in particular if the Printer::QueueItems function invalidated Printer::selected_queues_index)
  # and enable or disable the "Edit", "Delete", and "Test" buttons accordingly.
  # "Edit" and "Delete" are only possible for local queues, "Test" is also possible for remote queues.
  # "Test" is disabled when there is no queue selected or no queue in the table
  # and when the queue state is not "ready" (i.e. when jobs are rejected and/or when printing is disabled).
  selected_queue_index = Convert.to_integer(
    UI.QueryWidget(Id(:overview_table), :CurrentItem)
  )
  # To be safe invalidate Printer::selected_connections_index, Printer::current_device_uri,
  # Printer::selected_queues_index, and Printer::current_queue_name in any case by default and as fallback.
  # In particular invalidate Printer::selected_connections_index and Printer::selected_queues_index
  # to let the getCurrentDeviceURI function in connectionwizard.ycp fail to avoid that
  # the URI of a different previously preselected queue becomes preselected in the Connection Wizard.
  # The index of the currently selected queue is stored in selected_queue_index
  # which is used to re-enable those values later if appropriate conditions are met:
  Printer.selected_connections_index = -1
  Printer.current_device_uri = ""
  Printer.selected_queues_index = -1
  Printer.current_queue_name = ""
  if selected_queue_index == nil || Ops.less_than(selected_queue_index, 0)
    UI.ChangeWidget(:test, :Enabled, false)
    UI.ChangeWidget(:edit, :Enabled, false)
    UI.ChangeWidget(:delete, :Enabled, false)
  else
    if "local" ==
        Ops.get(Printer.queues, [selected_queue_index, "config"], "remote") ||
        "class" ==
          Ops.get(
            Printer.queues,
            [selected_queue_index, "config"],
            "remote"
          )
      # Printer::current_queue_name, and Printer::current_device_uri are re-enabled:
      Printer.selected_queues_index = selected_queue_index
      Printer.current_queue_name = Ops.get(
        Printer.queues,
        [selected_queue_index, "name"],
        ""
      )
      Printer.current_device_uri = Ops.get(
        Printer.queues,
        [selected_queue_index, "uri"],
        ""
      )
      # Only local queues or local classes can be deleted:
      UI.ChangeWidget(:delete, :Enabled, true)
      # But only a local queue can be edited:
      if "local" ==
          Ops.get(
            Printer.queues,
            [selected_queue_index, "config"],
            "remote"
          )
        UI.ChangeWidget(:edit, :Enabled, true)
      else
        UI.ChangeWidget(:edit, :Enabled, false)
      end
    else
      UI.ChangeWidget(:edit, :Enabled, false)
      UI.ChangeWidget(:delete, :Enabled, false)
    end
    # Any queue or class can be tested if it is in "ready" state:
    if "yes" ==
        Ops.get(Printer.queues, [selected_queue_index, "rejecting"], "") ||
        "yes" ==
          Ops.get(Printer.queues, [selected_queue_index, "disabled"], "")
      UI.ChangeWidget(:test, :Enabled, false)
    else
      UI.ChangeWidget(:test, :Enabled, true)
    end
  end

  if :delete == Ops.get(event, "ID") &&
      "Activated" == Ops.get_string(event, "EventReason", "")
    queue_name = Builtins.deletechars(
      Ops.get(Printer.queues, [selected_queue_index, "name"], ""),
      "'"
    )
    if "" == queue_name
      Popup.AnyMessage(
        _("Nothing Selected"),
        # Body of a Popup::AnyMessage when no queue was selected from the list:
        _("Select an entry.")
      )
      return nil
    end
    if "local" !=
        Ops.get(Printer.queues, [selected_queue_index, "config"], "remote") &&
        "class" !=
          Ops.get(
            Printer.queues,
            [selected_queue_index, "config"],
            "remote"
          )
      Popup.AnyMessage(
        _("Cannot Delete"),
        # Body of a Popup::AnyMessage when a remote queue was selected to be deleted:
        _(
          "This is a remote configuration. Only local configurations can be deleted."
        )
      )
      return nil
    end
    if !Popup.AnyQuestion(
        _("Confirm Deletion"),
        # Body of a confirmation popup before a queue will be deleted:
        _(
          "The selected configuration would be deleted immediately and cannot be restored."
        ),
        # 'Yes' button label of a confirmation popup before a queue will be deleted:
        Builtins.sformat(_("Delete configuration %1"), queue_name),
        # 'No' button label of a confirmation popup before a queue will be deleted:
        _("Do not delete it"),
        :focus_no
      )
      return nil
    end
    if "class" ==
        Ops.get(Printer.queues, [selected_queue_index, "config"], "remote")
      # because a class cannot be re-created with the YaST printer module because
      # the YaST printer module has no support to add or edit classes
      # because classes are only useful in bigger printing environments
      # which is out of the scope of the use cases of the YaST printer module.
      # Nevertheless it is possible to delete a class with the YaST printer module
      # so that the user can get rid of a class which may have been created by accident
      # with whatever other setup tool:
      if !Popup.ContinueCancelHeadline(
          _("Confirm Deletion of a Class"),
          # Body of a confirmation popup before a class will be deleted:
          _("A deleted class cannot be re-created with this tool.")
        )
        return nil
      end
    end
    # To be safe invalidate Printer::selected_queues_index in any case:
    Printer.selected_queues_index = -1
    Builtins.y2milestone(
      "Queue '%1' to be deleted: '%2'",
      queue_name,
      Ops.get(Printer.queues, selected_queue_index, {})
    )
    # No error messages here because Printer::DeleteQueue already shows them:
    Printer.DeleteQueue(queue_name)
    # Re-run the OverviewDialog (with a re-created list of queues) via the sequencer:
    return :delete
  end

  if :test == Ops.get(event, "ID") &&
      "Activated" == Ops.get_string(event, "EventReason", "")
    Builtins.y2milestone("printing test page")
    # Delete ' characters because they are used for quoting in the bash commandlines below:
    queue_name = Builtins.deletechars(
      Ops.get(Printer.queues, [selected_queue_index, "name"], ""),
      "'"
    )
    # The URI scheme is the first word up to the ':' character in the URI:
    uri_scheme = Ops.get(
      Builtins.splitstring(
        Ops.get(Printer.queues, [selected_queue_index, "uri"], ""),
        ":"
      ),
      0,
      ""
    )
    if "" == queue_name
      Popup.AnyMessage(
        _("Nothing Selected"),
        # Body of a Popup::AnyMessage when no queue was selected from the list:
        _("Select an entry.")
      )
      return nil
    end
    if "yes" ==
        Ops.get(Printer.queues, [selected_queue_index, "rejecting"], "no")
      Popup.AnyMessage(
        _("Rejecting Print Jobs"),
        # Body of a Popup::AnyMessage when the queue rejects print jobs:
        _("The testpage cannot be printed because print jobs are rejected.")
      )
      # Do a refresh of the overview content to be on the safe side.
      # Perhaps the actual current queue state is no longer "rejecting".
      # Re-run the OverviewDialog (with re-created queue status) via the sequencer:
      return :refresh
    end
    if "yes" ==
        Ops.get(Printer.queues, [selected_queue_index, "disabled"], "no")
      Popup.AnyMessage(
        _("Printout Disabled"),
        # Body of a Popup::AnyMessage when printing is disabled for the queue:
        _("The testpage cannot be printed because printout is disabled.")
      )
      # Do that a refresh of the overview content to be on the safe side.
      # Perhaps the actual current queue state is no longer "disabled".
      # Re-run the OverviewDialog (with re-created queue status) via the sequencer:
      return :refresh
    end
    if "local" ==
        Ops.get(Printer.queues, [selected_queue_index, "config"], "remote")
      # so that the user can just click the button with "modify" functionality
      # if he likes to change the configuration when the testprint is not o.k.
      Printer.selected_queues_index = selected_queue_index
      # Test whether there are already pending jobs in a local queue.
      # If yes, the queue is usually currently actively printing because
      # the test above makes sure that the queue has printing enabled.
      # When this command fails for whatever reason, it is a safe fallback
      # to assume that there are no pending jobs in the queue:
      if Printerlib.ExecuteBashCommand(
          Ops.add(
            Ops.add(
              Ops.add(
                Ops.add("/usr/bin/lpstat -h localhost -o '", queue_name),
                "' | egrep -q '^"
              ),
              queue_name
            ),
            "-[0-9]+'"
          )
        )
        pending_job_info = _(
          "There are pending print jobs which might be deleted before the testpage is printed."
        )
        if Printerlib.ExecuteBashCommand(
            Ops.add(
              Ops.add(
                Ops.add(
                  Ops.add("/usr/bin/lpstat -h localhost -o '", queue_name),
                  "' -p '"
                ),
                queue_name
              ),
              "'"
            )
          )
          pending_job_info = Ops.get_string(Printerlib.result, "stdout", "")
        end
        if Popup.AnyQuestionRichText(
            # where %1 will be replaced by the queue name.
            Builtins.sformat(
              _("Delete Pending Print Jobs For %1"),
              queue_name
            ),
            Ops.add(Ops.add("<pre>", pending_job_info), "</pre>"),
            70,
            20,
            # 'Yes' button label of a confirmation popup
            # before all pending jobs in a queue will be deleted:
            _("Delete them before printing testpage"),
            # 'No' button label of a confirmation popup
            # before all pending jobs in a queue will be deleted:
            _("Print testpage after the other jobs"),
            :focus_no
          )
          if !Printerlib.ExecuteBashCommand(
              Ops.add(
                Ops.add("/usr/bin/cancel -a -h localhost '", queue_name),
                "'"
              )
            )
            Popup.ErrorDetails(
              Builtins.sformat(
                # where %1 will be replaced by the queue name.
                # Only a simple message because this error does not happen on a normal system.
                _("Failed to delete all pending jobs for %1."),
                queue_name
              ), # Message of a Popup::ErrorDetails
              Ops.get_string(Printerlib.result, "stderr", "")
            )
          end
        end
      end
    end
    testprint_job_title = Ops.add("YaST2testprint_", queue_name)
    # Since CUPS 1.4 there is no longer a readymade PostScript testpage in CUPS, see
    # https://bugzilla.novell.com/show_bug.cgi?id=520617
    # Therefore a slightly modified CUPS 1.3.10 testprint.ps was added
    # to yast2-printer as /usr/share/YaST2/data/testprint.ps
    # The following modifications
    #   --- cups-1.3.10/data/testprint.ps  2009-01-13 18:27:16.000000000 +0100
    #   +++ data/testprint.ps              2009-07-09 15:25:26.000000000 +0200
    #   @@ -564 +564 @@
    #   -  (Printer Test Page) CENTER           % Show text centered
    #   +  (CUPS Printer Test Page) CENTER      % Show text centered
    #   @@ -570 +570 @@
    #   -  (Printed with CUPS v1.3.x) show
    #   +  (Printed with CUPS) show
    # make it obvious that it is not a YaST testpage but a CUPS testpage
    # and it is now independent of the CUPS version.
    testprint_file_name = "/usr/share/YaST2/data/testprint.ps"
    if !Popup.AnyQuestion(
        _("Test printout"),
        # Popup::AnyQuestion message:
        _("Print one or two pages e.g. to test duplex printing"),
        # Popup::AnyQuestion so called 'yes' (default) button label:
        _("Single test page"),
        # Popup::AnyQuestion so called 'no' button label:
        _("Two test pages"),
        # The so called 'yes' button is the default choice:
        :focus_yes
      )
      testprint_file_name = "/usr/share/YaST2/data/testprint.2pages.ps"
    end
    # Do not enforce to talk to the cupsd on localhost when submiting the testpage
    # because testpage printing must also work for a "client-only" config.
    if !Printerlib.ExecuteBashCommand(
        Ops.add(
          Ops.add(
            Ops.add(
              Ops.add(
                Ops.add(
                  Ops.add(Ops.add("/usr/bin/lp -d '", queue_name), "' -t '"),
                  testprint_job_title
                ),
                "' -o page-label=\""
              ),
              queue_name
            ),
            ":YaST2testprint@$(hostname)\" "
          ),
          testprint_file_name
        )
      )
      Popup.ErrorDetails(
        Builtins.sformat(
          # where %1 will be replaced by the queue name.
          # Only a simple message because this error does not happen on a normal system.
          _("Failed to print testpage for %1."),
          queue_name
        ), # Message of a Popup::ErrorDetails
        Ops.get_string(Printerlib.result, "stderr", "")
      )
      # When submitting the testpage to the queue failed (also for non-local queues)
      # there might be whatever reason (e.g. a remote queue might have been deleted in the meantime)
      # so that a refresh of the overview content is needed to be on the safe side.
      # Re-run the OverviewDialog (with re-created queue status) via the sequencer:
      return :refresh
    end
    test_print_command_stdout = Ops.get_string(
      Printerlib.result,
      "stdout",
      ""
    )
    test_print_success = Popup.AnyQuestion(
      _("Wait Until Testpage Printing Finished"),
      # Popup::AnyQuestion message regarding testpage printout result
      # where %1 will be replaced by the queue name.
      Builtins.sformat(
        _("Sent testpage to %1. Printing should start soon."),
        queue_name
      ),
      # Popup::AnyQuestion 'Yes' button label
      # regarding a positive testpage printout result:
      _("Testpage printout was successful"),
      # Popup::AnyQuestion 'No' button label
      # regarding a negative testpage printout result:
      _("Testpage printing failed"),
      :focus_yes
    )
    if "local" ==
        Ops.get(Printer.queues, [selected_queue_index, "config"], "remote")
      # it seems something went wrong with the testpage printing
      # so that the user can delete all pending jobs now.
      # Via the "cancel" command the cupsd sends termination signals
      # to running filter processes for the queue so that the filters
      # (in particular the printer driver) could do whatever is needed
      # to switch an actively printing printer device into a clean state
      # (e.g. exit its graphics printing mode and switch back to normal mode).
      # The backend process terminates when the filters have finished.
      # This helps in usual cases (in particular when a good driver is used)
      # if something had messed up for an actively printing job but
      # unfortunately there is no option for the "cancel" command
      # which lets the cupsd kill the backend process as emergency brake
      # when something is really wrong e.g. a wrong driver lets the printer
      # spit out zillions of sheets with nonsense characters.
      # When this command fails for whatever reason, it is a safe fallback
      # to assume that there are no pending jobs in the queue:
      if Printerlib.ExecuteBashCommand(
          Ops.add(
            Ops.add(
              Ops.add(
                Ops.add("/usr/bin/lpstat -h localhost -o '", queue_name),
                "' | egrep -q '^"
              ),
              queue_name
            ),
            "-[0-9]+'"
          )
        )
        pending_job_info = _(
          "There are pending print jobs which might be deleted now."
        )
        if Printerlib.ExecuteBashCommand(
            Ops.add(
              Ops.add(
                Ops.add(
                  Ops.add("/usr/bin/lpstat -h localhost -o '", queue_name),
                  "' -p '"
                ),
                queue_name
              ),
              "'"
            )
          )
          pending_job_info = Ops.get_string(Printerlib.result, "stdout", "")
        end
        if Popup.AnyQuestionRichText(
            # where %1 will be replaced by the queue name.
            Builtins.sformat(
              _("Delete Pending Print Jobs For %1"),
              queue_name
            ),
            Ops.add(Ops.add("<pre>", pending_job_info), "</pre>"),
            70,
            20,
            # 'Yes' button label of a confirmation popup
            # before all pending jobs in a queue will be deleted:
            _("Delete all pending jobs"),
            # 'No' button label of a confirmation popup
            # before all pending jobs in a queue will be deleted:
            _("Do not delete them"),
            :focus_no
          )
          if !Printerlib.ExecuteBashCommand(
              Ops.add(
                Ops.add("/usr/bin/cancel -a -h localhost '", queue_name),
                "'"
              )
            )
            Popup.ErrorDetails(
              Builtins.sformat(
                # where %1 will be replaced by the queue name.
                # Only a simple message because this error does not happen on a normal system.
                _("Failed to delete all pending jobs for %1."),
                queue_name
              ), # Message of a Popup::ErrorDetails
              Ops.get_string(Printerlib.result, "stderr", "")
            )
          end
          # Deal with the backend process regardless whether or not
          # the above cancel command was successful because
          # killing the backend process is an emergency brake
          # when something is really wrong.
          # Sleep 1 second in any case to let the backend process terminate orderly:
          Builtins.sleep(1000)
          backend_is_running_commandline = Ops.add(
            Ops.add(
              Ops.add(
                Ops.add("ps -C '", uri_scheme),
                "' -o pid=,args= | grep '"
              ),
              testprint_job_title
            ),
            "'"
          )
          # Do nothing to be on the safe side if the next command fails for whatever reason:
          if Printerlib.ExecuteBashCommand(backend_is_running_commandline)
            # Sleep 10 seconds to give the backend process more time to terminate orderly
            # which may still wait for the filters to finish because of the above cancel command.
            # There is no user feedback while waiting here because I assume that
            # the user expects that it takes a bit of time to delete all pending jobs.
            Builtins.sleep(10000)
            if Printerlib.ExecuteBashCommand(backend_is_running_commandline)
              Builtins.y2milestone(
                "Still running backend process to be killed: '%1'",
                Ops.get_string(Printerlib.result, "stdout", "")
              )
              # Kill the backend process:
              Printerlib.ExecuteBashCommand(
                Ops.add(
                  backend_is_running_commandline,
                  " | cut -s -d ' ' -f1 | head -n 1 | tr -d -c '[:digit:]'"
                )
              )
              backend_pid = Ops.get_string(Printerlib.result, "stdout", "")
              if "" != backend_pid
                Printerlib.ExecuteBashCommand(
                  Ops.add(Ops.add("kill -9 '", backend_pid), "'")
                )
              end
            end
          end
        end
      end
      if !test_print_success
        # and when it is a local queue, extract logging information about the test print job
        # from /var/log/cups/error_log and show them to the user:
        test_print_command_stdout = Builtins.deletechars(
          test_print_command_stdout,
          "'"
        )
        Printerlib.ExecuteBashCommand(
          Ops.add(
            Ops.add(
              Ops.add(
                Ops.add(
                  #   echo ' funprinter-1000-123 ' | sed -e 's/.*-//'
                  # so that it works even if there is a '-' in the queue name
                  # which is not allowed but may happen nevertheless, see
                  # http://bugzilla.novell.com/show_bug.cgi?id=556819#c12
                  # and the final tr removes in particular spaces and newline:
                  "echo '",
                  test_print_command_stdout
                ), # sed is greedy and cuts all up to the last '-' for example
                "' | grep -o ' "
              ),
              queue_name
            ),
            "-[0-9]* ' | sed -e 's/.*-//' | tr -d -c '[:digit:]'"
          )
        )
        test_print_job_number = Ops.get_string(
          Printerlib.result,
          "stdout",
          ""
        )
        test_print_cups_error_log = ""
        if "" != test_print_job_number
          Printerlib.ExecuteBashCommand(
            Ops.add(
              Ops.add("grep '\\[Job ", test_print_job_number),
              "\\]' /var/log/cups/error_log | grep -v '^[dD]' | tail -n 20"
            )
          )
          test_print_cups_error_log = Ops.add(
            "...\n",
            Ops.get_string(Printerlib.result, "stdout", "")
          )
        end
        # Ignore an effectively empty test_print_cups_error_log:
        if "" !=
            Builtins.filterchars(
              test_print_cups_error_log,
              Printer.alnum_chars
            )
          where_full_log = _(
            "For the full log, see the /var/log/cups/error_log file."
          )
          Popup.AnyMessage(
            Builtins.sformat(
              _(
                "CUPS log information while processing the testpage for %1 (English only)"
              ),
              queue_name
            ), # Header of a Popup::AnyMessage where %1 will be replaced by the queue name:
            Ops.add(
              Ops.add(
                test_print_cups_error_log,
                "\n----------------------------------------------------------------------\n"
              ),
              where_full_log
            )
          )
        else
          Popup.Notify(
            # but the test_print_cups_error_log was effectively empty,
            # show a very generic info to the user to show at least something:
            _(
              "For CUPS log information, see the /var/log/cups/error_log file."
            )
          )
        end
      end
    else
      if !test_print_success
        Popup.Notify(
          # show a very generic info to the user to show at least something:
          _(
            "When printing via a remote system fails, you may ask an admin of the remote system."
          )
        )
      end
    end
    # While testpage printing the backend may have failed (also for non-local queues)
    # e.g. exited with exit code 1 (CUPS_BACKEND_FAILED) or 4 (CUPS_BACKEND_STOP)
    # which disables the queue so that a refresh of the overview content is needed.
    # Re-run the OverviewDialog (with re-created queue status) via the sequencer:
    return :refresh
  end

  if :add == Ops.get(event, "ID") &&
      "Activated" == Ops.get_string(event, "EventReason", "")
    # (i.e. a ServerName != "localhost/127.0.0.1" in /etc/cups/client.conf).
    # There is no new Printerlib::DetermineClientOnly() here because
    # it was run in initOverview() and the client_only state cannot be
    # changed in YaST while the Overview dialog runs:
    if Printerlib.client_only
      if !Popup.YesNoHeadline(
          # where %1 will be replaced by the server name:
          Builtins.sformat(
            _("Disable Remote CUPS Server '%1'"),
            Printerlib.client_conf_server_name
          ),
          # PopupYesNoHeadline body:
          _(
            "A remote CUPS server setting conflicts with adding a configuration."
          )
        )
        return nil
      end
      # Remove the 'ServerName' entry in /etc/cups/client.conf:
      if !Printerlib.ExecuteBashCommand(
          Ops.add(Printerlib.yast_bin_dir, "cups_client_only none")
        )
        Popup.ErrorDetails(
          # Only a simple message because this error does not happen on a normal system
          # (i.e. a system which is not totally broken or totally messed up).
          _(
            "Failed to remove the 'ServerName' entry in /etc/cups/client.conf"
          ),
          Ops.get_string(Printerlib.result, "stderr", "")
        )
        return nil
      end
    end
    if !Printerlib.GetAndSetCupsdStatus("")
      # Do a restart to be safe.
      # Printerlib::GetAndSetCupsdStatus already shows a confirmation popup:
      return nil if !Printerlib.GetAndSetCupsdStatus("restart")
    end
    # To be safe autodetect the queues again.
    # When there was a switch from "client only" to a local running cupsd
    # existing local queues are not yet know so that the NewQueueName function
    # may not notice when a queue name proposal for a new (i.e. added) queue
    # already exists as local queue:
    Printer.AutodetectQueues
    # Invalidate Printer::current_device_uri so that the Printer::ConnectionItems function
    # does not set a valid Printer::selected_connections_index so that the BasicAddDialog
    # does not preselect a connection so that the first connection in the list is preselected
    # (via Table widget fallback) which is still better than an arbitrary preselected entry:
    Printer.current_device_uri = ""
    return :add
  end

  if :edit == Ops.get(event, "ID") &&
      Ops.get_string(event, "EventReason", "") == "Activated"
    queue_name = Builtins.deletechars(
      Ops.get(Printer.queues, [selected_queue_index, "name"], ""),
      "'"
    )
    if "" == queue_name
      Popup.AnyMessage(
        _("Nothing Selected"),
        # Body of a Popup::AnyMessage when no queue was selected from the list:
        _("Select an entry.")
      )
      return nil
    end
    if "local" !=
        Ops.get(Printer.queues, [selected_queue_index, "config"], "remote")
      Popup.AnyMessage(
        _("Cannot Modify"),
        # Body of a Popup::AnyMessage when a remote queue was selected to be modified:
        _(
          "This is a remote configuration. Only local configurations can be modified."
        )
      )
      return nil
    end
    Printer.selected_queues_index = selected_queue_index
    # Invalidate Printer::current_device_uri so that the Printer::ConnectionItems function
    # does not set a valid Printer::selected_connections_index so that the BasicAddDialog
    # does not preselect a connection so that the first connection in the list is preselected
    # (via Table widget fallback) which is correct because this is the current connection:
    Printer.current_device_uri = ""
    Builtins.y2milestone(
      "Queue '%1' to be modified: '%2'",
      queue_name,
      Ops.get(Printer.queues, selected_queue_index, {})
    )
    return :modify
  end

  # Default and fallback return value:
  nil
end

- (Object) initialize_printer_overview(include_target)



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# File '../../src/include/printer/overview.rb', line 30

def initialize_printer_overview(include_target)
  Yast.import "UI"

  textdomain "printer"

  Yast.import "Label"
  Yast.import "Popup"
  Yast.import "Printerlib"
  Yast.import "Printer"
  Yast.import "Wizard"

  Yast.include include_target, "printer/helps.rb"

  @widgetOverview = VBox(
    Left(
      HBox(
        Label(_("Show")), # Label for CheckBoxes to select local and/or remote print queues to be listed:
        HSpacing(2),
        CheckBox(
          Id(:local_content_checkbox),
          Opt(:notify),
          # CheckBox to select local print queues to be listed:
          _("&Local")
        ),
        HSpacing(2),
        CheckBox(
          Id(:remote_content_checkbox),
          Opt(:notify),
          # CheckBox to select remote print queues to be listed:
          _("&Remote")
        ),
        HSpacing(1),
        Label(
          Id(:client_only_server_name),
          # This spaces string is a workaround for a bug in the UI
          # to preallocate space on the screen when the spaces string
          # is replaced by a real string if it is a client-only config.
          # Otherwise the real string is cut to less than one character
          # (at least with openSUSE 11.0 and Qt):
          "                                        "
        )
      )
    ),
    VWeight(
      2,
      Table(
        Id(:overview_table),
        Opt(:notify, :immediate, :keepSorting),
        Header(
          # Where the queue configuration exists (local or remote):
          _("Configuration"),
          # Header of a Table column with a list of print queues.
          # Print queue name:
          _("Name"),
          # Header of a Table column with a list of print queues.
          # Print queue description (e.g. model or driver):
          _("Description"),
          # Header of a Table column with a list of print queues.
          # Location of the printer (e.g. second floor, room 2.3):
          _("Location"),
          # Header of a Table column with a list of print queues.
          # Whether or not is is the default queue:
          _("Default"),
          # Header of a Table column with a list of print queues.
          # Queue status (accepting/rejecting and enabled/disabled):
          _("Status")
        ) # Header of a Table column with a list of print queues.
      )
    ),
    HBox(
      PushButton(Id(:add), Label.AddButton),
      PushButton(Id(:edit), Label.EditButton),
      PushButton(Id(:delete), Label.DeleteButton),
      HStretch(),
      PushButton(
        Id(:refresh),
        # PushButton label to refresh the list of print queues:
        _("Re&fresh List")
      ),
      PushButton(
        Id(:test),
        # PushButton label to print a test page:
        _("Print &Test Page")
      )
    )
  )
end

- (Object) initOverview(key)



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# File '../../src/include/printer/overview.rb', line 118

def initOverview(key)
  Builtins.y2milestone("entering initOverview with key '%1'", key)
  # First of all the multi-line string because such strings cannot be indented:
  required_cupsd_not_accessible =
    # Message of a Popup::ErrorDetails
    # when a local cupsd is required but it is not accessible.
    # YaST did already run 'lpstat -h localhost -r'
    # to check whether or not a local cupsd is accessible.
    # The command is shown here to the user (even if it is a bit technical)
    # to have him informed what goes on here and what he can do on his own.
    _(
      "A locally running CUPS daemon is required, but it seems to be not accessible.\n" +
        "Check with 'lpstat -h localhost -r' whether a local cupsd is accessible.\n" +
        "A non-accessible cupsd leads to an endless sequence of further failures.\n"
    )
  cupsd_not_on_official_port =
    # Message of a Popup::ErrorDetails
    # when the local cupsd does not use the official IPP port (631).
    # A rather technical text because this does not happen on normal systems
    # By default the cupsd uses the official IPP port (631).
    # If not, the user must have intentionally and manually changed
    # the port setting for the cupsd in /etc/cups/cupsd.conf
    _(
      "The CUPS daemon seems not to listen on the official IANA IPP port (631).\n" +
        "Check with 'netstat -nap | grep cupsd' where the cupsd actually listens.\n" +
        "This happens when there is a 'Listen ...:1234' or 'Port 1234' setting\n" +
        "(where 1234 means any port number which is not the official port 631)\n" +
        "in /etc/cups/cupsd.conf (check also if there is 'BrowsePort 1234').\n" +
        "The YaST printer module does not support a non-official port.\n" +
        "A non-official port leads to an endless sequence of further failures.\n" +
        "If you really must use a non-official port, you cannot use\n" +
        "the YaST printer module to configure your printers.\n"
    )
  Wizard.SetDesktopIcon("printer")
  # The button with "back/cancel" functionality is removed here
  # only because here it happens faster than only in the handleOverview function
  # to avoid that the button is visible for some time until it is actually removed.
  # See the handleOverview function for details why this button is removed.
  Wizard.HideBackButton
  local_content_selected = Printer.queue_filter_show_local
  remote_content_selected = Printer.queue_filter_show_remote
  local_cupsd_required = true
  feedback_popup_exists = false
  # Determine whether or not it is currently a real client-only config
  # (i.e. a ServerName != "localhost/127.0.0.1" in /etc/cups/client.conf)
  # and ignore when it fails (i.e. use the fallback value silently):
  time_before = Builtins.time
  Printerlib.DetermineClientOnly
  if Printerlib.client_only
    if Ops.greater_than(Ops.subtract(Builtins.time, time_before), 10)
      Builtins.y2milestone(
        "DetermineClientOnly took longer than 10 seconds. CUPS server is '%1'",
        Printerlib.client_conf_server_name
      )
      # When Printerlib::DetermineClientOnly took longer than 10 seconds
      # something is fishy regarding CUPS server access.
      # In this case show feedback what goes on because for example
      # when a CUPS server is unknown by the DNS there can be longer DNS timeouts
      # which would also delay Printer::TestClientOnlyServer for up to a few minutes
      # so that the user must be informed what goes on while he is wainting:
      Popup.ShowFeedback(
        "",
        # Busy message:
        # Body of a Popup::ShowFeedback
        _(
          "Running several tests regarding CUPS server accessibility...\n(this might take some time)"
        )
      )
      feedback_popup_exists = true
      # Sleep one second to let the feedback popup stay for at least one second
      # to avoid a flickering popup which appears and disappears at the same time:
      Builtins.sleep(1000)
    end
    # A non-accessible client-only server leads to an endless sequence of weird further behaviour
    # of the module so that a non-accessible server is only accepted after insistent warning popups:
    if !Printer.TestClientOnlyServer(
        Printerlib.client_conf_server_name,
        false
      )
      if feedback_popup_exists
        Popup.ClearFeedback
        feedback_popup_exists = false
      end
      if Popup.YesNoHeadline(
          # where %1 will be replaced by the server name:
          Builtins.sformat(
            _("Do no longer use the inaccessible CUPS server '%1'?"),
            Printerlib.client_conf_server_name
          ),
          # Popup::YesNoHeadline body recommendation how to answer the headline question
          # where %1 will be replaced by the server name:
          Builtins.sformat(
            _(
              "To proceed, you should agree that '%1' will be no longer used."
            ),
            Printerlib.client_conf_server_name
          )
        )
        if !Printerlib.ExecuteBashCommand(
            Ops.add(Printerlib.yast_bin_dir, "cups_client_only none")
          )
          Popup.ErrorDetails(
            _(
              "Failed to remove the 'ServerName' entry in /etc/cups/client.conf"
            ),
            Ops.get_string(Printerlib.result, "stderr", "")
          )
          Popup.Warning(
            _(
              "A non-accessible server leads to an endless sequence of delays and failures."
            )
          )
        end
        # The 'ServerName' entry in /etc/cups/client.conf was removed
        # so that it is now no longer a real client-only config and
        # therefore the Printerlib::client_* values must be determined anew:
        Printerlib.DetermineClientOnly
      else
        Popup.Warning(
          _(
            "A non-accessible server leads to an endless sequence of delays and failures."
          )
        )
      end
    end
    # The 'ServerName' entry in /etc/cups/client.conf may have been removed above
    # when the client-only server was non-accessible so that it might be now
    # no longer a real client-only config and therefore it is tested again
    # whether or not it is still a real client-only config:
    if Printerlib.client_only
      local_cupsd_required = false
      local_content_selected = false
      remote_content_selected = true
      UI.ChangeWidget(
        :client_only_server_name,
        :Value,
        Builtins.sformat(
          # where %1 will be replaced by the CUPS server name.
          _("CUPS Server %1"),
          Printerlib.client_conf_server_name
        ) # Show the CUPS server name if it is a client-only config
      )
      # In case of a client-only config it does not work to show local queues:
      UI.ChangeWidget(:local_content_checkbox, :Enabled, false)
    end
  end
  # Determine whether or not a local cupsd is accessible:
  time_before = Builtins.time
  if local_cupsd_required && !Printerlib.GetAndSetCupsdStatus("")
    if Ops.greater_than(Ops.subtract(Builtins.time, time_before), 10)
      Builtins.y2milestone(
        "GetAndSetCupsdStatus('') took longer than 10 seconds."
      )
      # When Printerlib::GetAndSetCupsdStatus took longer than 10 seconds
      # something is fishy regarding CUPS server access.
      # In this case show feedback what goes on because subsequent
      # Printerlib::GetAndSetCupsdStatus calls would be also delayed
      # so that the user must be informed what goes on while he is wainting:
      Popup.ShowFeedback(
        "",
        # Busy message:
        # Body of a Popup::ShowFeedback:
        _("Testing if CUPS server is accessible...")
      )
      feedback_popup_exists = true
      # Sleep one second to let the feedback popup stay for at least one second
      # to avoid a flickering popup which appears and disappears at the same time:
      Builtins.sleep(1000)
    end
    # Printerlib::GetAndSetCupsdStatus results also false when
    # a local running cupsd does not listen on the official IPP port.
    # Therefore, to be on the safe side, do a restart here.
    # Printerlib::GetAndSetCupsdStatus already shows a confirmation popup:
    Printerlib.GetAndSetCupsdStatus("restart")
    # Check again whether a required local cupsd is actually accessible
    # because the user may have rejected to start it in the above call or
    # the user may have aborted the Popup::TimedMessage from the above call
    # which would wait until a started cupsd becomes actually accessible.
    if !Printerlib.GetAndSetCupsdStatus("")
      if feedback_popup_exists
        Popup.ClearFeedback
        feedback_popup_exists = false
      end
      Popup.ErrorDetails(
        required_cupsd_not_accessible,
        Ops.add(
          Ops.add(Ops.get_string(Printerlib.result, "stderr", ""), "\n"),
          Ops.get_string(Printerlib.result, "stdout", "")
        )
      )
      # A special case is when the cupsd does not listen on the official IANA IPP port (631).
      # Then "lpstat -h localhost -r" also fails ("-h localhost:port" would have to be used).
      # When there is a process which runs the command "cupsd"
      # check if something is accessible on port 631.
      # Do this test only here (and not in Printerlib::GetAndSetCupsdStatus)
      # because the Overview is the initial dialog which is shown to the user
      # when the YaST printer module started and if the cupsd does not listen
      # on the official IPP port, a single error popup when the Overview dialog
      # is launched is sufficient.
      # The YaST printer module does not support when the cupsd listens
      # on a non-official port e.g. via "Listen *:1234" and/or "Port 1234"
      # and/or "BrowsePort 1234" settings in /etc/cups/cupsd.conf.
      # Skip this test (and hope for the best) when netcat is not available
      # because in yast2-printer.spec there can be only "Recommends: netcat".
      # There have been user complaints who insist not to have netcat installed
      # because they insist that "netcat is a hacker intrusion tool" and thorough
      # explanations of the difference between netcat and e.g. nmap did not help.
      if Printerlib.ExecuteBashCommand("ps -C cupsd") &&
          Printerlib.ExecuteBashCommand("type -P netcat")
        if !Printerlib.ExecuteBashCommand("netcat -v -w 1 -z localhost 631")
          Popup.ErrorDetails(
            cupsd_not_on_official_port,
            Ops.add(
              Ops.add(Ops.get_string(Printerlib.result, "stderr", ""), "\n"),
              Ops.get_string(Printerlib.result, "stdout", "")
            )
          )
        end
      end
    end
  end
  if feedback_popup_exists
    Popup.ClearFeedback
    feedback_popup_exists = false
  end
  if Printer.printer_auto_dialogs
    # (by calling in printer_auto.ycp the "Change" function)
    # it does not make sense to let the user show local queues:
    UI.ChangeWidget(:local_content_checkbox, :Enabled, false)
    # Disable also the [Add] Button.
    # It stays disabled as long as the dialog runs because
    # it is nowhere again re-enabled below.
    UI.ChangeWidget(:add, :Enabled, false)
  end
  UI.ChangeWidget(:local_content_checkbox, :Value, local_content_selected)
  UI.ChangeWidget(:remote_content_checkbox, :Value, remote_content_selected)
  UI.ChangeWidget(
    :overview_table,
    :Items,
    Printer.QueueItems(
      Printer.queue_filter_show_local,
      Printer.queue_filter_show_remote
    )
  )
  # Try to preselect the current_queue_name if it exists in the overview_table:
  if Ops.greater_or_equal(Printer.selected_queues_index, 0)
    # because the Printer::QueueItems function sets Printer::selected_queues_index != -1
    # only if such an item exists in the overview_table so that this item can be preselected:
    Builtins.y2milestone(
      "Preselected queue: '%1'",
      Ops.get(Printer.queues, Printer.selected_queues_index, {})
    )
    UI.ChangeWidget(
      :overview_table,
      :CurrentItem,
      Id(Printer.selected_queues_index)
    )
  end
  Builtins.y2milestone("leaving initOverview")

  nil
end