This file is part of ILIAS, a powerful learning management system published by ILIAS open source e-Learning e.V. More...

Collaboration diagram for ilLMContentRendererGUI:

Public Member Functions
	__construct (ilLMPresentationService $service, ilLMPresentationGUI $parent_gui, ilLanguage $lng, ilCtrl $ctrl, ilAccessHandler $access, ilObjUser $user, ilHelpGUI $help, int $requested_obj_id)

	render (int $a_head_foot_page_id=0)

	getLMPageGUI (int $a_id)

	handleCodeParagraph (int $page_id, int $paragraph_id, string $title, string $text)

	renderPreconditionsOfPage ()
	Render preconditions of the page. More...

Data Fields
const	STATUS_ACCESS = 0

const	STATUS_NO_ACCESS = 1

const	STATUS_NO_PUBLIC_ACCESS = 2

const	STATUS_FAILED_PRECONDITIONS = 3

const	STATUS_CORRECT_ANSWER_MISSING = 4

const	STATUS_NO_PAGE_IN_CHAPTER = 5

const	STATUS_DEACTIVATED_PAGE = 6

const	STATUS_NO_PAGE_FOUND = 7

Protected Member Functions
	initHelp ()

	determineStatus ()

	initSearchHighlighting ()

	renderFocusMessage ()

	renderNoPageAccess ()
	Render info message, if page is not accessible in public area. More...

	renderMessageScreen (string $a_content)
	Render message screen. More...

	renderNoPublicAccess ()
	Render info message, if page is not accessible in public area. More...

	renderNavRestrictionDueToQuestions ()
	Render message if navigation to page is not allowed due to unanswered questions. More...

	renderNoPageInChapterMessage ()
	Render no page in chapter message. More...

	renderNoPageFoundMessage ()
	Render no page found message. More...

	renderDeactivatedPageMessage ()

Protected Attributes
ilLMNavigationStatus	$navigation_status

int	$requested_focus_return

int	$requested_obj_id = 0

string	$search_string

int	$focus_id

bool	$deactivated_page

bool	$chapter_has_no_active_page

ilAccessHandler	$access

ilObjUser	$user

ilHelpGUI	$help

int	$current_page = null

ilObjLearningModule	$lm

ilLanguage	$lng

bool	$offline

ilLMTracker	$tracker

ilCtrl	$ctrl

ilLMTree	$lm_tree

ilLMPresentationGUI	$parent_gui

ilSetting	$lm_set

string	$lang

ilLMPresentationLinker	$linker

string	$requested_frame

ilObjectTranslation	$ot

string	$concrete_lang = ""

Detailed Description

This file is part of ILIAS, a powerful learning management system published by ILIAS open source e-Learning e.V.

ILIAS is licensed with the GPL-3.0, see https://www.gnu.org/licenses/gpl-3.0.en.html You should have received a copy of said license along with the source code, too.

If this is not the case or you just want to try ILIAS, you'll find us at: https://www.ilias.de https://github.com/ILIAS-eLearning

Author: Alexander Killing killi.nosp@m.ng@l.nosp@m.eifos.nosp@m..de

Definition at line 22 of file class.ilLMContentRendererGUI.php.

Constructor & Destructor Documentation

◆ __construct()

ilLMContentRendererGUI::__construct	(	ilLMPresentationService	$service,
		ilLMPresentationGUI	$parent_gui,
		ilLanguage	$lng,
		ilCtrl	$ctrl,
		ilAccessHandler	$access,
		ilObjUser	$user,
		ilHelpGUI	$help,
		int	$requested_obj_id
	)

Definition at line 58 of file class.ilLMContentRendererGUI.php.

       {
         $this->access = $access;
         $this->user = $user;
         $this->help = $help;
         $this->ctrl = $ctrl;
         $this->lm_tree = $service->getLMTree();
         $this->lang = $service->getPresentationStatus()->getLang();
         $this->current_page = $service->getNavigationStatus()->getCurrentPage();
         $this->lm = $service->getLearningModule();
         $this->lm_set = $service->getSettings();
         $this->lng = $lng;
         $this->offline = $service->getPresentationStatus()->offline;
         $this->tracker = $service->getTracker();
         $this->linker = $service->getLinker();
         $this->parent_gui = $parent_gui;
         $this->chapter_has_no_active_page = $service->getNavigationStatus()->isChapterWithoutActivePage();
         $this->deactivated_page = $service->getNavigationStatus()->isDeactivatedPage();
         $this->focus_id = $service->getPresentationStatus()->getFocusId();
         $this->concrete_lang = $service->getPresentationStatus()->getConcreteLang();
         $this->search_string = $service->getPresentationStatus()->getSearchString();
         $this->requested_obj_id = $requested_obj_id;
         $this->requested_focus_return = $service->getPresentationStatus()->getFocusReturn();
         $this->requested_frame = $service->getRequest()->getFrame();
         $this->navigation_status = $service->getNavigationStatus();
         $this->ot = ilObjectTranslation::getInstance($this->lm->getId());
     }

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Member Function Documentation

◆ determineStatus()

ilLMContentRendererGUI::determineStatus ( )

protected

Definition at line 102 of file class.ilLMContentRendererGUI.php.

References $current_page, $user, ilObjContentObject\_checkPreconditionsOfPage(), ilLMObject\_lookupType(), and ilPageObject\lookupParentId().

Referenced by render().

                                         : int
     {
         $user = $this->user;
 
         $status = self::STATUS_ACCESS;
         // check page id
         $requested_page_lm = ilLMPage::lookupParentId($this->current_page, "lm");
         if ($requested_page_lm != $this->lm->getId()) {
             $status = self::STATUS_NO_ACCESS;
         }
 
         // preconditions
         if (!ilObjContentObject::_checkPreconditionsOfPage($this->lm->getRefId(), $this->lm->getId(), $this->current_page)) {
             $status = self::STATUS_FAILED_PRECONDITIONS;
         }
 
         // if navigation is restricted based on correct answered questions
         // check if we have preceeding pages including unsanswered/incorrect answered questions
         if (!$this->offline) {
             if ($this->lm->getRestrictForwardNavigation()) {
                 if ($this->tracker->hasPredIncorrectAnswers($this->current_page)) {
                     $status = self::STATUS_CORRECT_ANSWER_MISSING;
                 }
             }
         }
 
         // no active page found in chapter
         if ($this->chapter_has_no_active_page &&
             ilLMObject::_lookupType($this->requested_obj_id) == "st") {
             $status = self::STATUS_NO_PAGE_IN_CHAPTER;
         }
 
         if ($this->deactivated_page) {
             $status = self::STATUS_DEACTIVATED_PAGE;
         }
 
         if ($this->current_page == 0) {
             $status = self::STATUS_NO_PAGE_FOUND;
         }
         return $status;
     }

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◆ getLMPageGUI()

ilLMContentRendererGUI::getLMPageGUI ( int $a_id )

Definition at line 288 of file class.ilLMContentRendererGUI.php.

References $concrete_lang, ilPageObject\_exists(), and ilPageObjectGUI\OFFLINE.

Referenced by render().

                                            : ilLMPageGUI
     {
         if ($this->lang != "-" && ilPageObject::_exists("lm", $a_id, $this->lang)) {
             $page_gui = new ilLMPageGUI($a_id, 0, false, $this->lang, $this->concrete_lang);
         } else {
             if ($this->lang != "-" && ilPageObject::_exists("lm", $a_id, $this->ot->getFallbackLanguage())) {
                 $page_gui = new ilLMPageGUI($a_id, 0, false, $this->ot->getFallbackLanguage(), $this->concrete_lang);
             } else {
                 $page_gui = new ilLMPageGUI($a_id, 0, false, "", $this->concrete_lang);
             }
         }
         if ($this->offline) {
             $page_gui->setOutputMode(ilPageObjectGUI::OFFLINE);
         }
         return $page_gui;
     }

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◆ handleCodeParagraph()

ilLMContentRendererGUI::handleCodeParagraph	(	int	$page_id,
		int	$paragraph_id,
		string	$title,
		string	$text
	)

Definition at line 305 of file class.ilLMContentRendererGUI.php.

References ilFileUtils\makeDirParents().

      : void {
         $directory = $this->parent_gui->getOfflineDirectory() . "/codefiles/" . $page_id . "/" . $paragraph_id;
         ilFileUtils::makeDirParents($directory);
         $file = $directory . "/" . $title;
         if (!($fp = fopen($file, "w+"))) {
             die("<strong>Error</strong>: Could not open \"" . $file . "\" for writing" .
                 " in <strong>" . __FILE__ . "</strong> on line <strong>" . __LINE__ . "</strong><br />");
         }
         chmod($file, 0770);
         fwrite($fp, $text);
         fclose($fp);
     }

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◆ initHelp()

ilLMContentRendererGUI::initHelp ( )

protected

Definition at line 94 of file class.ilLMContentRendererGUI.php.

References $help, and ilHelpGUI\setScreenIdComponent().

Referenced by render().

                                  : void
     {
         $ilHelp = $this->help;
         $ilHelp->setScreenIdComponent("lm");
         $ilHelp->setScreenId("content");
         $ilHelp->setSubScreenId("content");
     }

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◆ initSearchHighlighting()

ilLMContentRendererGUI::initSearchHighlighting ( )

protected

Definition at line 144 of file class.ilLMContentRendererGUI.php.

References $user, ilUserSearchCache\_getInstance(), ilObject\getId(), and ilUserSearchCache\LAST_QUERY.

Referenced by render().

                                                : void
     {
         $user = $this->user;
 
         if ($this->search_string != "" && !$this->offline) {
             $cache = ilUserSearchCache::_getInstance($user->getId());
             $cache->switchSearchType(ilUserSearchCache::LAST_QUERY);
             $search_string = $cache->getQuery();
 
             // advanced search?
             if (is_array($search_string)) {
                 $search_string = $search_string["lom_content"];
             }
 
             $p = new ilQueryParser($search_string);
             $p->parse();
 
             $words = $p->getQuotedWords();
             if (is_array($words)) {
                 foreach ($words as $w) {
                     ilTextHighlighterGUI::highlight("ilLMPageContent", $w);
                 }
             }
         }
     }

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◆ render()

ilLMContentRendererGUI::render ( int $a_head_foot_page_id = 0 )

Definition at line 170 of file class.ilLMContentRendererGUI.php.

References $current_page, $lang, $user, ilLMObject\_exists(), ilLMPageObject\_getPresentationTitle(), ilCourseLMHistory\_updateLastAccess(), determineStatus(), getLMPageGUI(), initHelp(), initSearchHighlighting(), renderDeactivatedPageMessage(), renderFocusMessage(), renderNavRestrictionDueToQuestions(), renderNoPageAccess(), renderNoPageFoundMessage(), renderNoPageInChapterMessage(), renderNoPublicAccess(), and renderPreconditionsOfPage().

      : string {
         $ilUser = $this->user;
 
         $head = $foot = "";
 
         $this->initHelp();
 
         switch ($this->determineStatus()) {
             case self::STATUS_NO_ACCESS:
                 return $this->renderNoPageAccess();
 
             case self::STATUS_NO_PUBLIC_ACCESS:
                 return $this->renderNoPublicAccess();
 
             case self::STATUS_FAILED_PRECONDITIONS:
                 return $this->renderPreconditionsOfPage();
 
             case self::STATUS_CORRECT_ANSWER_MISSING:
                 return $this->renderNavRestrictionDueToQuestions();
 
             case self::STATUS_NO_PAGE_IN_CHAPTER:
                 return $this->renderNoPageInChapterMessage();
 
             case self::STATUS_DEACTIVATED_PAGE:
                 return $this->renderDeactivatedPageMessage();
 
             case self::STATUS_NO_PAGE_FOUND:
                 return $this->renderNoPageFoundMessage();
         }
 
         // page id is e.g. > 0 when footer or header page is processed
         if ($a_head_foot_page_id == 0) {
             $page_id = $this->current_page;
             $this->initSearchHighlighting();
         } else {
             $page_id = $a_head_foot_page_id;
         }
 
         // check if page is out of focus
         $focus_mess = $this->renderFocusMessage();
         $page_object_gui = $this->getLMPageGUI($page_id);
 
         // @todo 6.0 (factor this out (maybe to ilLMPageGUI)
         $this->parent_gui->basicPageGuiInit($page_object_gui);
 
         $page_object = $page_object_gui->getPageObject();
         $page_object->buildDom();
         $page_object->registerOfflineHandler($this);
 
         $page_object_gui->setTemplateOutput(false);
 
         // Update course items
         ilCourseLMHistory::_updateLastAccess($ilUser->getId(), $this->lm->getRefId(), $page_id);
 
         // read link targets
         $page_object_gui->setPageLinker($this->linker);
 
         // get lm page object
         $lm_pg_obj = new ilLMPageObject($this->lm, $page_id);
         $lm_pg_obj->setLMId($this->lm->getId());
 
         // determine target frames for internal links
         $page_object_gui->setLinkFrame($this->requested_frame);
 
         // page title and tracking (not for header or footer page)
         if ($page_id == 0 || ($page_id != $this->lm->getHeaderPage() &&
                 $page_id != $this->lm->getFooterPage())) {
             $page_object_gui->setPresentationTitle(
                 ilLMPageObject::_getPresentationTitle(
                     $lm_pg_obj->getId(),
                     $this->lm->getPageHeader(),
                     $this->lm->isActiveNumbering(),
                     (bool) $this->lm_set->get("time_scheduled_page_activation"),
                     false,
                     0,
                     $this->lang
                 )
             );
 
             // track access
             if ($page_id != 0 && !$this->offline) {
                 $this->tracker->trackAccess($page_id, $ilUser->getId());
             }
         } else {
             $page_object_gui->setEnabledPageFocus(false);
             $page_object_gui->getPageConfig()->setEnableSelfAssessment(false);
         }
 
         // ADDED FOR CITATION
         $page_object_gui->setLinkParams("ref_id=" . $this->lm->getRefId());
         $page_object_gui->setTemplateTargetVar("PAGE_CONTENT");
         // @todo 6.0
         //              $page_object_gui->setSourcecodeDownloadScript($this->getSourcecodeDownloadLink());
 
         $ret = $page_object_gui->presentation($page_object_gui->getOutputMode());
 
         // process header
         if ($this->lm->getHeaderPage() > 0 &&
             $page_id != $this->lm->getHeaderPage() &&
             ($page_id == 0 || $page_id != $this->lm->getFooterPage())) {
             if (ilLMObject::_exists($this->lm->getHeaderPage())) {
                 $head = $this->render($this->lm->getHeaderPage());
             }
         }
 
         // process footer
         if ($this->lm->getFooterPage() > 0 &&
             $page_id != $this->lm->getFooterPage() &&
             ($page_id == 0 || $page_id != $this->lm->getHeaderPage())) {
             if (ilLMObject::_exists($this->lm->getFooterPage())) {
                 $foot = $this->render($this->lm->getFooterPage());
             }
         }
         return $head . $focus_mess . $ret . $foot;
     }

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◆ renderDeactivatedPageMessage()

ilLMContentRendererGUI::renderDeactivatedPageMessage ( )

protected

Definition at line 457 of file class.ilLMContentRendererGUI.php.

References ilPageObject\_lookupActivationData(), ilLMObject\_lookupTitle(), ilDatePresentation\formatDate(), IL_CAL_DATETIME, ILIAS\Repository\lng(), and ilUtil\now().

Referenced by render().

                                                      : string
     {
         $mtpl = new ilTemplate(
             "tpl.no_content_message.html",
             true,
             true,
             "components/ILIAS/LearningModule"
         );
         $m = $this->lng->txt("cont_page_currently_deactivated");
         $act_data = ilLMPage::_lookupActivationData($this->current_page, $this->lm->getType());
         if ($act_data["show_activation_info"] &&
             (ilUtil::now() < $act_data["activation_start"])) {
             $m .= "<p>" . sprintf(
                 $this->lng->txt("cont_page_activation_on"),
                 ilDatePresentation::formatDate(
                     new ilDateTime($act_data["activation_start"], IL_CAL_DATETIME)
                 )
             ) .
                 "</p>";
         }
         $mtpl->setVariable("MESSAGE", $m);
         $mtpl->setVariable(
             "ITEM_TITLE",
             ilLMObject::_lookupTitle($this->current_page)
         );
         return $mtpl->get();
     }

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◆ renderFocusMessage()

ilLMContentRendererGUI::renderFocusMessage ( )

protected

Definition at line 323 of file class.ilLMContentRendererGUI.php.

References $path, ilObject\_lookupType(), ILIAS\Repository\ctrl(), ILIAS\Repository\lng(), and null.

Referenced by render().

                                            : string
     {
         $focus_mess = "";
         if ($this->focus_id > 0) {
             $path = $this->lm_tree->getPathId($this->current_page);
 
             // out of focus
             if (!in_array($this->focus_id, $path)) {
                 $mtpl = new ilTemplate(
                     "tpl.out_of_focus_message.html",
                     true,
                     true,
                     "components/ILIAS/LearningModule"
                 );
                 $mtpl->setVariable("MESSAGE", $this->lng->txt("cont_out_of_focus_message"));
                 $mtpl->setVariable("TXT_SHOW_CONTENT", $this->lng->txt("cont_show_content_after_focus"));
 
                 if ($this->requested_focus_return == 0 || ilObject::_lookupType((int) $this->requested_focus_return, true) != "crs") {
                     $mtpl->setVariable("TXT_BACK_BEGINNING", $this->lng->txt("cont_to_focus_beginning"));
                     $this->ctrl->setParameter($this->parent_gui, "obj_id", $this->focus_id);
                     $mtpl->setVariable("LINK_BACK_TO_BEGINNING", $this->ctrl->getLinkTarget($this->parent_gui, "layout"));
                     $this->ctrl->setParameter($this->parent_gui, "obj_id", $this->requested_obj_id);
                 } else {
                     $mtpl->setVariable("TXT_BACK_BEGINNING", $this->lng->txt("cont_to_focus_return_crs"));
                     $mtpl->setVariable("LINK_BACK_TO_BEGINNING", ilLink::_getLink($this->requested_focus_return));
                 }
 
                 $this->ctrl->setParameter($this->parent_gui, "focus_id", null);
                 $mtpl->setVariable("LINK_SHOW_CONTENT", $this->ctrl->getLinkTarget($this->parent_gui, "layout"));
                 $this->ctrl->setParameter($this->parent_gui, "focus_id", $this->requested_obj_id);
 
                 $focus_mess = $mtpl->get();
             } else {
                 $succ_page_id = $this->navigation_status->getSuccessorPageId();
                 $path2 = array();
                 if ($succ_page_id > 0) {
                     $path2 = $this->lm_tree->getPathId($succ_page_id);
                 }
                 if ($succ_page_id == 0 || !in_array($this->focus_id, $path2)) {
                     $mtpl = new ilTemplate(
                         "tpl.out_of_focus_message.html",
                         true,
                         true,
                         "components/ILIAS/LearningModule"
                     );
                     $mtpl->setVariable("MESSAGE", $this->lng->txt("cont_out_of_focus_message_last_page"));
                     $mtpl->setVariable("TXT_SHOW_CONTENT", $this->lng->txt("cont_show_content_after_focus"));
 
                     if ($this->requested_focus_return == 0 || ilObject::_lookupType($this->requested_focus_return, true) != "crs") {
                         $mtpl->setVariable("TXT_BACK_BEGINNING", $this->lng->txt("cont_to_focus_beginning"));
                         $this->ctrl->setParameter($this->parent_gui, "obj_id", $this->focus_id);
                         $mtpl->setVariable("LINK_BACK_TO_BEGINNING", $this->ctrl->getLinkTarget($this->parent_gui, "layout"));
                         $this->ctrl->setParameter($this->parent_gui, "obj_id", $this->requested_obj_id);
                     } else {
                         $mtpl->setVariable("TXT_BACK_BEGINNING", $this->lng->txt("cont_to_focus_return_crs"));
                         $mtpl->setVariable("LINK_BACK_TO_BEGINNING", ilLink::_getLink($this->requested_focus_return));
                     }
 
                     $this->ctrl->setParameter($this->parent_gui, "focus_id", null);
                     $mtpl->setVariable("LINK_SHOW_CONTENT", $this->ctrl->getLinkTarget($this->parent_gui, "layout"));
                     $this->ctrl->setParameter($this->parent_gui, "focus_id", $this->requested_obj_id);
 
                     $focus_mess = $mtpl->get();
                 }
             }
         }
         return $focus_mess;
     }

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◆ renderMessageScreen()

ilLMContentRendererGUI::renderMessageScreen ( string $a_content )

protected

Render message screen.

Definition at line 404 of file class.ilLMContentRendererGUI.php.

Referenced by renderNavRestrictionDueToQuestions(), renderNoPageAccess(), renderNoPageFoundMessage(), and renderNoPublicAccess().

                                                              : string
     {
         // content style
         $tpl = new ilTemplate("tpl.page_message_screen.html", true, true, "components/ILIAS/LearningModule");
         $tpl->setVariable("TXT_PAGE_NO_PUBLIC_ACCESS", $a_content);
 
         return $tpl->get();
     }

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◆ renderNavRestrictionDueToQuestions()

ilLMContentRendererGUI::renderNavRestrictionDueToQuestions ( )

protected

Render message if navigation to page is not allowed due to unanswered questions.

Definition at line 425 of file class.ilLMContentRendererGUI.php.

References ILIAS\Repository\lng(), and renderMessageScreen().

Referenced by render().

                                                            : string
     {
         return $this->renderMessageScreen($this->lng->txt("cont_no_page_access_unansw_q"));
     }

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◆ renderNoPageAccess()

ilLMContentRendererGUI::renderNoPageAccess ( )

protected

Render info message, if page is not accessible in public area.

Definition at line 396 of file class.ilLMContentRendererGUI.php.

References ILIAS\Repository\lng(), and renderMessageScreen().

Referenced by render().

                                            : string
     {
         return $this->renderMessageScreen($this->lng->txt("msg_no_page_access"));
     }

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◆ renderNoPageFoundMessage()

ilLMContentRendererGUI::renderNoPageFoundMessage ( )

protected

Render no page found message.

Definition at line 452 of file class.ilLMContentRendererGUI.php.

References ILIAS\Repository\lng(), and renderMessageScreen().

Referenced by render().

                                                  : string
     {
         return $this->renderMessageScreen($this->lng->txt("cont_no_page"));
     }

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◆ renderNoPageInChapterMessage()

ilLMContentRendererGUI::renderNoPageInChapterMessage ( )

protected

Render no page in chapter message.

Definition at line 433 of file class.ilLMContentRendererGUI.php.

References ilLMObject\_lookupTitle(), and ILIAS\Repository\lng().

Referenced by render().

                                                      : string
     {
         $mtpl = new ilTemplate(
             "tpl.no_content_message.html",
             true,
             true,
             "components/ILIAS/LearningModule"
         );
         $mtpl->setVariable("MESSAGE", $this->lng->txt("cont_no_page_in_chapter"));
         $mtpl->setVariable(
             "ITEM_TITLE",
             ilLMObject::_lookupTitle($this->requested_obj_id)
         );
         return $mtpl->get();
     }

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◆ renderNoPublicAccess()

ilLMContentRendererGUI::renderNoPublicAccess ( )

protected

Render info message, if page is not accessible in public area.

Definition at line 416 of file class.ilLMContentRendererGUI.php.

References ILIAS\Repository\lng(), and renderMessageScreen().

Referenced by render().

                                              : string
     {
         return $this->renderMessageScreen($this->lng->txt("msg_page_no_public_access"));
     }

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◆ renderPreconditionsOfPage()

ilLMContentRendererGUI::renderPreconditionsOfPage ( )

Render preconditions of the page.

Definition at line 489 of file class.ilLMContentRendererGUI.php.

References $current_page, ilObjContentObject\_getMissingPreconditionsOfPage(), ilObjContentObject\_getMissingPreconditionsTopChapter(), ilLMObject\_lookupTitle(), ilObject\_lookupTitle(), and ILIAS\Repository\lng().

Referenced by render().

                                                : string
     {
         $succ_node = "";
         $conds = ilObjContentObject::_getMissingPreconditionsOfPage($this->lm->getRefId(), $this->lm->getId(), $this->current_page);
         $topchap = ilObjContentObject::_getMissingPreconditionsTopChapter($this->lm->getRefId(), $this->lm->getId(), $this->current_page);
 
         $ptpl = new ilTemplate("tpl.page_preconditions.html", true, true, "components/ILIAS/LearningModule");
 
         // list all missing preconditions
         foreach ($conds as $cond) {
             $obj_link = ilLink::_getLink($cond["trigger_ref_id"]);
             $ptpl->setCurrentBlock("condition");
             $ptpl->setVariable("VAL_ITEM", ilObject::_lookupTitle($cond["trigger_obj_id"]));
             $ptpl->setVariable("LINK_ITEM", $obj_link);
             if ($cond["operator"] == "passed") {
                 $cond_str = $this->lng->txt("passed");
             } else {
                 $cond_str = $this->lng->txt("condition_" . $cond["operator"]);
             }
             $ptpl->setVariable("VAL_CONDITION", $cond_str . " " . $cond["value"]);
             $ptpl->parseCurrentBlock();
         }
 
         $ptpl->setVariable(
             "TXT_MISSING_PRECONDITIONS",
             sprintf(
                 $this->lng->txt("cont_missing_preconditions"),
                 ilLMObject::_lookupTitle($topchap)
             )
         );
         $ptpl->setVariable("TXT_ITEM", $this->lng->txt("object"));
         $ptpl->setVariable("TXT_CONDITION", $this->lng->txt("condition"));
 
         // output skip chapter link
         $parent = $this->lm_tree->getParentId($topchap);
         $childs = $this->lm_tree->getChildsByType($parent, "st");
         $j = -2;
         $i = 1;
         foreach ($childs as $child) {
             if ($child["child"] == $topchap) {
                 $j = $i;
             }
             if ($i++ == ($j + 1)) {
                 $succ_node = $this->lm_tree->fetchSuccessorNode($child["child"], "pg");
             }
         }
         if ($succ_node != "") {
             $link = "<br /><a href=\"" .
                 $this->linker->getLink("layout", $succ_node["obj_id"], $this->requested_frame) .
                 "\">" . $this->lng->txt("cont_skip_chapter") . "</a>";
             $ptpl->setVariable("LINK_SKIP_CHAPTER", $link);
         }
 
         return $ptpl->get();
     }