/**
  * FORM HtmlBlock: Output form.
  *
  */
 public function outputFormHtmlBlock()
 {
     global $lng;
     $lng->loadLanguageModule("block");
     include "Services/Form/classes/class.ilPropertyFormGUI.php";
     $form_gui = new ilPropertyFormGUI();
     $values = $this->getValuesHtmlBlock();
     // Property Title
     $alert = $this->form_check["HtmlBlock"]["Title"]["error"] != "" ? $this->form_check["HtmlBlock"]["Title"]["error"] : "";
     $form_gui->addTextProperty($lng->txt("block_html_block_title"), "block_title", $values["Title"], "", $alert, true, "200");
     // Property Content
     $alert = $this->form_check["HtmlBlock"]["Content"]["error"] != "" ? $this->form_check["HtmlBlock"]["Content"]["error"] : "";
     $form_gui->addTextAreaProperty($lng->txt("block_html_block_content"), "block_content", $values["Content"], "", $alert, false, "40", "8", true);
     // save and cancel commands
     if (in_array($this->getFormEditMode(), array(IL_FORM_CREATE, IL_FORM_RE_CREATE))) {
         $form_gui->addCommandButton("saveHtmlBlock", $lng->txt("save"));
         $form_gui->addCommandButton("cancelSaveHtmlBlock", $lng->txt("cancel"));
     } else {
         $form_gui->addCommandButton("updateHtmlBlock", $lng->txt("save"));
         $form_gui->addCommandButton("cancelUpdateHtmlBlock", $lng->txt("cancel"));
     }
     $form_gui->setTitle($lng->txt("block_html_block_head"));
     $form_gui->setFormAction($this->ctrl->getFormAction($this));
     // individual preparation of form
     $this->prepareFormHtmlBlock($form_gui);
     return $form_gui->getHTML();
 }