/**
     * Main function, redering the actual content of the editing page
     *
     * @return void
     * @todo Define visibility
     */
    public function main()
    {
        //TODO: change locallang*.php to locallang*.xml
        $docHeaderButtons = $this->getButtons();
        $this->content = $this->doc->startPage($GLOBALS['LANG']->sL('LLL:EXT:lang/locallang_core.php:file_edit.php.pagetitle'));
        // Hook	before compiling the output
        if (isset($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/file_edit.php']['preOutputProcessingHook'])) {
            $preOutputProcessingHook =& $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/file_edit.php']['preOutputProcessingHook'];
            if (is_array($preOutputProcessingHook)) {
                $hookParameters = array('content' => &$this->content, 'target' => &$this->target);
                foreach ($preOutputProcessingHook as $hookFunction) {
                    \TYPO3\CMS\Core\Utility\GeneralUtility::callUserFunction($hookFunction, $hookParameters, $this);
                }
            }
        }
        $pageContent = $this->doc->header($GLOBALS['LANG']->sL('LLL:EXT:lang/locallang_core.php:file_edit.php.pagetitle') . ' ' . htmlspecialchars($this->fileObject->getName()));
        $pageContent .= $this->doc->spacer(2);
        $code = '';
        $extList = $GLOBALS['TYPO3_CONF_VARS']['SYS']['textfile_ext'];
        if ($extList && \TYPO3\CMS\Core\Utility\GeneralUtility::inList($extList, $this->fileObject->getExtension())) {
            // Read file content to edit:
            $fileContent = $this->fileObject->getContents();
            // Making the formfields
            $hValue = 'file_edit.php?target=' . rawurlencode($this->origTarget) . '&returnUrl=' . rawurlencode($this->returnUrl);
            // Edit textarea:
            $code .= '
				<div id="c-edit">
					<textarea rows="30" name="file[editfile][0][data]" wrap="off"' . $this->doc->formWidthText(48, 'width:98%;height:80%', 'off') . ' class="fixed-font enable-tab">' . \TYPO3\CMS\Core\Utility\GeneralUtility::formatForTextarea($fileContent) . '</textarea>
					<input type="hidden" name="file[editfile][0][target]" value="' . $this->fileObject->getUid() . '" />
					<input type="hidden" name="redirect" value="' . htmlspecialchars($hValue) . '" />
				</div>
				<br />';
            // Make shortcut:
            if ($GLOBALS['BE_USER']->mayMakeShortcut()) {
                $this->MCONF['name'] = 'xMOD_file_edit.php';
                $docHeaderButtons['shortcut'] = $this->doc->makeShortcutIcon('target', '', $this->MCONF['name'], 1);
            } else {
                $docHeaderButtons['shortcut'] = '';
            }
        } else {
            $code .= sprintf($GLOBALS['LANG']->sL('LLL:EXT:lang/locallang_core.php:file_edit.php.coundNot'), $extList);
        }
        // Ending of section and outputting editing form:
        $pageContent .= $this->doc->sectionEnd();
        $pageContent .= $code;
        // Hook	after compiling the output
        if (isset($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/file_edit.php']['postOutputProcessingHook'])) {
            $postOutputProcessingHook =& $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/file_edit.php']['postOutputProcessingHook'];
            if (is_array($postOutputProcessingHook)) {
                $hookParameters = array('pageContent' => &$pageContent, 'target' => &$this->target);
                foreach ($postOutputProcessingHook as $hookFunction) {
                    \TYPO3\CMS\Core\Utility\GeneralUtility::callUserFunction($hookFunction, $hookParameters, $this);
                }
            }
        }
        // Add the HTML as a section:
        $markerArray = array('CSH' => $docHeaderButtons['csh'], 'FUNC_MENU' => \TYPO3\CMS\Backend\Utility\BackendUtility::getFuncMenu($this->id, 'SET[function]', $this->MOD_SETTINGS['function'], $this->MOD_MENU['function']), 'BUTTONS' => $docHeaderButtons, 'PATH' => $this->title, 'CONTENT' => $pageContent);
        $this->content .= $this->doc->moduleBody(array(), $docHeaderButtons, $markerArray);
        $this->content .= $this->doc->endPage();
        $this->content = $this->doc->insertStylesAndJS($this->content);
    }