/**
* Initializes the preview and loads the needed javascripts and styles.
*/
private static function initPreview()
{
if (self::$initialized) {
return;
}
global $tpl, $lng, $ilCtrl;
// jquery
include_once "./Services/jQuery/classes/class.iljQueryUtil.php";
iljQueryUtil::initjQuery();
// load qtip
include_once "./Services/UIComponent/Tooltip/classes/class.ilTooltipGUI.php";
ilTooltipGUI::initLibrary();
// needed scripts & styles
$tpl->addJavaScript("./Services/Preview/js/jquery.mousewheel.js");
$tpl->addJavaScript("./Services/Preview/js/ilPreview.js");
$tpl->addCss(ilUtil::getStyleSheetLocation("filesystem", "preview.css", "Services/Preview"));
// create loading template
$tmpl = new ilTemplate("tpl.preview.html", true, true, "Services/Preview");
$tmpl->setCurrentBlock("no_preview");
$tmpl->setVariable("TXT_NO_PREVIEW", "%%0%%");
$tmpl->parseCurrentBlock();
$initialHtml = str_replace(array("\r\n", "\r"), "\n", $tmpl->get());
$lines = explode("\n", $initialHtml);
$new_lines = array();
foreach ($lines as $i => $line) {
if (!empty($line)) {
$new_lines[] = trim($line);
}
}
$initialHtml = implode($new_lines);
// add default texts and values
include_once "./Services/JSON/classes/class.ilJsonUtil.php";
$tpl->addOnLoadCode("il.Preview.texts.preview = \"" . self::jsonSafeString($lng->txt("preview")) . "\";");
$tpl->addOnLoadCode("il.Preview.texts.showPreview = \"" . self::jsonSafeString($lng->txt("preview_show")) . "\";");
$tpl->addOnLoadCode("il.Preview.texts.close = \"" . self::jsonSafeString($lng->txt("close")) . "\";");
$tpl->addOnLoadCode("il.Preview.previewSize = " . ilPreviewSettings::getImageSize() . ";");
$tpl->addOnLoadCode("il.Preview.initialHtml = " . ilJsonUtil::encode($initialHtml) . ";");
$tpl->addOnLoadCode("il.Preview.highlightClass = \"ilContainerListItemOuterHighlight\";");
$tpl->addOnLoadCode("il.Preview.init();");
self::$initialized = true;
}
/**
* Creates the preview.
*
* @param ilObject $a_obj The object to create the preview for.
* @param bool $a_force true, to force the creation of the preview; false, to create the preview only if needed.
* @return bool true, if the preview was created; otherwise, false.
*/
public function create($a_obj, $a_force = false)
{
if (!ilPreviewSettings::isPreviewEnabled()) {
return false;
}
// get renderer for preview
require_once "./Services/Preview/classes/class.ilRendererFactory.php";
$renderer = ilRendererFactory::getRenderer($this);
// no renderer available?
if ($renderer == null) {
return false;
}
// exists, but still pending?
if ($this->getRenderStatus() == self::RENDER_STATUS_PENDING) {
return false;
}
// not forced? check if update really needed
if ($this->getRenderStatus() == self::RENDER_STATUS_CREATED && !$a_force) {
// check last modified against last render date
if ($a_obj->getLastUpdateDate() <= $this->getRenderDate()) {
return false;
}
}
// re-create the directory to store the previews
$this->getStorage()->delete();
$this->getStorage()->create();
// let the renderer create the preview
$renderer->render($this, $a_obj, true);
// save to database
$this->save();
return true;
}
/**
* Save preview settings
*/
public function savePreviewSettings()
{
global $rbacsystem, $ilErr, $ilCtrl, $tpl, $lng;
$this->tabs_gui->setTabActive('preview_settings');
if (!$rbacsystem->checkAccess("write", $this->object->getRefId())) {
$ilErr->raiseError($lng->txt("no_permission"), $ilErr->WARNING);
}
// get form
$form = $this->initPreviewSettingsForm();
if ($form->checkInput()) {
require_once "Services/Preview/classes/class.ilPreviewSettings.php";
ilPreviewSettings::setPreviewEnabled($_POST["enable_preview"] == 1);
ilPreviewSettings::setMaximumPreviews($_POST["max_previews_per_object"]);
ilUtil::sendSuccess($lng->txt('settings_saved'), true);
$ilCtrl->redirect($this, "editPreviewSettings");
} else {
$form->setValuesByPost();
$tpl->setContent($form->getHTML());
}
}
/**
* Gets the instance of the ilPreviewSettings.
* @return ilPreviewSettings
*/
private static function getInstance()
{
if (self::$instance == null) {
self::$instance = new ilPreviewSettings();
}
return self::$instance;
}
/**
* Gets the maximum number of preview pictures per object.
*
* @return int The current value
*/
protected final function getMaximumNumberOfPreviews()
{
return ilPreviewSettings::getMaximumPreviews();
}
