Collaboration diagram for ilLMContentRendererGUI:

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

	render ($a_head_foot_page_id=0)
	Render lm content. More...

	getLMPageGUI ($a_id)
	Get lm page gui object. More...

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

	getSuccessorPage ()
	Get successor 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 ()
	Init help. More...

	determineStatus ()
	Determine Status (should be factored out later to something like LMPageAccessStatus) More...

	initSearchHighlighting ()
	Init search highlighting. More...

	renderFocusMessage ()
	Render focus message. More...

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

	renderMessageScreen ($a_content)
	Show message screen. More...

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

	renderNavRestrictionDueToQuestions ()
	Show 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 ()
	Render deactivated page message. More...

Protected Attributes
	$access

	$user

	$help

	$current_page

	$lm

	$lng

	$offline

	$tracker

	$ctrl

	$lm_tree

	$parent_gui

	$lm_set

	$lang

	$linker

Detailed Description

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

Definition at line 11 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,
			$requested_obj_id
	)

Constructor.

Definition at line 95 of file class.ilLMContentRendererGUI.php.

      {
        global $DIC;
 
        $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->search_string = $service->getPresentationStatus()->getSearchString();
        $this->requested_obj_id = $requested_obj_id;
        $this->requested_focus_return = $service->getPresentationStatus()->getFocusReturn();
    }

References $access, $ctrl, $DIC, $help, $lng, $parent_gui, $service, $user, help(), and user().

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Member Function Documentation

◆ determineStatus()

ilLMContentRendererGUI::determineStatus ( )

protected

Determine Status (should be factored out later to something like LMPageAccessStatus)

Parameters

return int

Definition at line 147 of file class.ilLMContentRendererGUI.php.

    {
        $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;
        }
 
 
        // check if page is (not) visible in public area
        if ($user->getId() == ANONYMOUS_USER_ID &&
            $this->lm->getPublicAccessMode() == 'selected') {
            if (!ilLMObject::_isPagePublic($this->current_page)) {
                $status = self::STATUS_NO_PUBLIC_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;
    }

References $user, ilObjContentObject\_checkPreconditionsOfPage(), ilLMObject\_isPagePublic(), ilLMObject\_lookupType(), ilPageObject\lookupParentId(), STATUS_ACCESS, STATUS_CORRECT_ANSWER_MISSING, STATUS_DEACTIVATED_PAGE, STATUS_FAILED_PRECONDITIONS, STATUS_NO_ACCESS, STATUS_NO_PAGE_FOUND, STATUS_NO_PAGE_IN_CHAPTER, and STATUS_NO_PUBLIC_ACCESS.

Referenced by render().

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◆ getLMPageGUI()

ilLMContentRendererGUI::getLMPageGUI ( $a_id )

Get lm page gui object.

Parameters

return

Definition at line 359 of file class.ilLMContentRendererGUI.php.

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

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

Referenced by render().

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◆ getSuccessorPage()

ilLMContentRendererGUI::getSuccessorPage ( )

Get successor page.

Parameters

return

Definition at line 622 of file class.ilLMContentRendererGUI.php.

    {
        $ilUser = $this->user;
 
        $page_id = $this->current_page;
 
        if (empty($page_id)) {
            return 0;
        }
 
        // determine successor page_id
        $found = false;
 
        // empty chapter
        if ($this->chapter_has_no_active_page &&
            ilLMObject::_lookupType($this->requested_obj_id) == "st") {
            $c_id = $this->requested_obj_id;
        } else {
            if ($this->deactivated_page) {
                $c_id = $this->requested_obj_id;
            } else {
                $c_id = $page_id;
            }
        }
        while (!$found) {
            $succ_node = $this->lm_tree->fetchSuccessorNode($c_id, "pg");
            $c_id = $succ_node["obj_id"];
 
            $active = ilLMPage::_lookupActive(
                $c_id,
                $this->lm->getType(),
                $this->lm_set->get("time_scheduled_page_activation")
            );
 
            if ($succ_node["obj_id"] > 0 &&
                $ilUser->getId() == ANONYMOUS_USER_ID &&
                ($this->lm->getPublicAccessMode() == "selected" &&
                    !ilLMObject::_isPagePublic($succ_node["obj_id"]))) {
                $found = false;
            } elseif ($succ_node["obj_id"] > 0 && !$active) {
                // look, whether activation data should be shown
                $act_data = ilLMPage::_lookupActivationData((int) $succ_node["obj_id"], $this->lm->getType());
                if ($act_data["show_activation_info"] &&
                    (ilUtil::now() < $act_data["activation_start"])) {
                    $found = true;
                } else {
                    $found = false;
                }
            } else {
                $found = true;
            }
        }
 
        if ($found) {
            return $succ_node["obj_id"];
        }
        return 0;
    }

References $current_page, $ilUser, $user, ilLMObject\_isPagePublic(), ilPageObject\_lookupActivationData(), ilPageObject\_lookupActive(), ilLMObject\_lookupType(), and ilUtil\now().

Referenced by renderFocusMessage().

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◆ initHelp()

ilLMContentRendererGUI::initHelp ( )

protected

Init help.

Definition at line 133 of file class.ilLMContentRendererGUI.php.

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

References $help.

Referenced by render().

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◆ initSearchHighlighting()

ilLMContentRendererGUI::initSearchHighlighting ( )

protected

Init search highlighting.

Definition at line 204 of file class.ilLMContentRendererGUI.php.

    {
        $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);
                }
            }
        }
    }

References $user, ilUserSearchCache\_getInstance(), ilTextHighlighterGUI\highlight(), and ilUserSearchCache\LAST_QUERY.

Referenced by render().

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◆ render()

ilLMContentRendererGUI::render ( $a_head_foot_page_id = 0 )

Render lm content.

Parameters

int $a_head_foot_page_id

Returns: string

Definition at line 237 of file class.ilLMContentRendererGUI.php.

    {
        $ilUser = $this->user;
 
        $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
        $page_object_gui->setLinkFrame($_GET["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(),
                    $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;
    }

References $_GET, $current_page, $ilUser, $ret, $user, ilLMObject\_exists(), ilLMPageObject\_getPresentationTitle(), ilCourseLMHistory\_updateLastAccess(), determineStatus(), getLMPageGUI(), initHelp(), initSearchHighlighting(), render(), renderDeactivatedPageMessage(), renderFocusMessage(), renderNavRestrictionDueToQuestions(), renderNoPageAccess(), renderNoPageFoundMessage(), renderNoPageInChapterMessage(), renderNoPublicAccess(), renderPreconditionsOfPage(), STATUS_CORRECT_ANSWER_MISSING, STATUS_DEACTIVATED_PAGE, STATUS_FAILED_PRECONDITIONS, STATUS_NO_ACCESS, STATUS_NO_PAGE_FOUND, STATUS_NO_PAGE_IN_CHAPTER, and STATUS_NO_PUBLIC_ACCESS.

Referenced by render().

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◆ renderDeactivatedPageMessage()

ilLMContentRendererGUI::renderDeactivatedPageMessage ( )

protected

Render deactivated page message.

Returns: string

Definition at line 528 of file class.ilLMContentRendererGUI.php.

    {
        $mtpl = new ilTemplate(
            "tpl.no_content_message.html",
            true,
            true,
            "Modules/LearningModule"
        );
        $m = $this->lng->txt("cont_page_currently_deactivated");
        $act_data = ilLMPage::_lookupActivationData($this->requested_obj_id, $this->lm->getType());
        if ($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->requested_obj_id)
        );
        return $mtpl->get();
    }

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

Referenced by render().

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◆ renderFocusMessage()

ilLMContentRendererGUI::renderFocusMessage ( )

protected

Render focus message.

Parameters

return string

Definition at line 380 of file class.ilLMContentRendererGUI.php.

    {
        $focus_mess = "";
        if ($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,
                    "Modules/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", "");
                $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 {
                $sp = $this->getSuccessorPage();
                $path2 = array();
                if ($sp > 0) {
                    $path2 = $this->lm_tree->getPathId($this->getSuccessorPage());
                }
                if ($sp == 0 || !in_array($this->focus_id, $path2)) {
                    $mtpl = new ilTemplate(
                        "tpl.out_of_focus_message.html",
                        true,
                        true,
                        "Modules/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", "");
                    $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;
    }

References ilLink\_getLink(), ilObject\_lookupType(), and getSuccessorPage().

Referenced by render().

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◆ renderMessageScreen()

ilLMContentRendererGUI::renderMessageScreen ( $a_content )

protected

Show message screen.

Parameters

string content

Returns: string

Definition at line 465 of file class.ilLMContentRendererGUI.php.

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

References $a_content, and $tpl.

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

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◆ renderNavRestrictionDueToQuestions()

ilLMContentRendererGUI::renderNavRestrictionDueToQuestions ( )

protected

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

Returns: string

Definition at line 488 of file class.ilLMContentRendererGUI.php.

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

References renderMessageScreen().

Referenced by render().

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◆ renderNoPageAccess()

ilLMContentRendererGUI::renderNoPageAccess ( )

protected

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

Returns: string

Definition at line 454 of file class.ilLMContentRendererGUI.php.

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

References renderMessageScreen().

Referenced by render().

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◆ renderNoPageFoundMessage()

ilLMContentRendererGUI::renderNoPageFoundMessage ( )

protected

Render no page found message.

Returns: string

Definition at line 517 of file class.ilLMContentRendererGUI.php.

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

References renderMessageScreen().

Referenced by render().

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◆ renderNoPageInChapterMessage()

ilLMContentRendererGUI::renderNoPageInChapterMessage ( )

protected

Render no page in chapter message.

Returns: string

Definition at line 497 of file class.ilLMContentRendererGUI.php.

    {
        $mtpl = new ilTemplate(
            "tpl.no_content_message.html",
            true,
            true,
            "Modules/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();
    }

References ilLMObject\_lookupTitle().

Referenced by render().

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◆ renderNoPublicAccess()

ilLMContentRendererGUI::renderNoPublicAccess ( )

protected

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

Returns: string

Definition at line 478 of file class.ilLMContentRendererGUI.php.

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

References renderMessageScreen().

Referenced by render().

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◆ renderPreconditionsOfPage()

ilLMContentRendererGUI::renderPreconditionsOfPage ( )

show preconditions of the page

Definition at line 560 of file class.ilLMContentRendererGUI.php.

    {
        $conds = ilObjContentObject::_getMissingPreconditionsOfPage($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, "Modules/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"], $_GET["frame"]) .
                "\">" . $this->lng->txt("cont_skip_chapter") . "</a>";
            $ptpl->setVariable("LINK_SKIP_CHAPTER", $link);
        }
 
        return $ptpl->get();
    }