Contao\DC_Folder::generateTree PHP Method

    protected function generateTree($path, $intMargin, $mount = false, $blnProtected = true, $arrClipboard = null, $arrFound = array())
    {
        static $session;
        /** @var AttributeBagInterface $objSessionBag */
        $objSessionBag = \System::getContainer()->get('session')->getBag('contao_backend');
        $session = $objSessionBag->all();
        // Get the session data and toggle the nodes
        if (\Input::get('tg')) {
            $session['filetree'][\Input::get('tg')] = isset($session['filetree'][\Input::get('tg')]) && $session['filetree'][\Input::get('tg')] == 1 ? 0 : 1;
            $objSessionBag->replace($session);
            $this->redirect(preg_replace('/(&(amp;)?|\\?)tg=[^& ]*/i', '', \Environment::get('request')));
        }
        $return = '';
        $files = array();
        $folders = array();
        $intSpacing = 20;
        $level = $intMargin / $intSpacing + 1;
        // Mount folder
        if ($mount) {
            $folders = array($path);
        } else {
            foreach (scan($path) as $v) {
                if (strncmp($v, '.', 1) === 0) {
                    continue;
                }
                if (is_file($path . '/' . $v)) {
                    $files[] = $path . '/' . $v;
                } else {
                    if ($v == '__new__') {
                        $this->Files->rmdir(str_replace(TL_ROOT . '/', '', $path) . '/' . $v);
                    } else {
                        $folders[] = $path . '/' . $v;
                    }
                }
            }
            natcasesort($folders);
            $folders = array_values($folders);
            natcasesort($files);
            $files = array_values($files);
        }
        // Folders
        for ($f = 0, $c = count($folders); $f < $c; $f++) {
            $md5 = substr(md5($folders[$f]), 0, 8);
            $content = scan($folders[$f]);
            $currentFolder = str_replace(TL_ROOT . '/', '', $folders[$f]);
            $session['filetree'][$md5] = is_numeric($session['filetree'][$md5]) ? $session['filetree'][$md5] : 0;
            $currentEncoded = $this->urlEncode($currentFolder);
            $countFiles = count($content);
            // Subtract files that will not be shown
            foreach ($content as $file) {
                if (strncmp($file, '.', 1) === 0) {
                    --$countFiles;
                } elseif (!empty($arrFound) && !in_array($currentFolder . '/' . $file, $arrFound) && !preg_grep('/^' . preg_quote($currentFolder . '/' . $file, '/') . '\\//', $arrFound)) {
                    --$countFiles;
                }
            }
            if (!empty($arrFound) && $countFiles < 1 && !in_array($currentFolder, $arrFound)) {
                continue;
            }
            $return .= "\n  " . '<li class="tl_folder click2edit toggle_select hover-div"><div class="tl_left" style="padding-left:' . ($intMargin + ($countFiles < 1 ? 20 : 0)) . 'px">';
            // Add a toggle button if there are childs
            if ($countFiles > 0) {
                $img = !empty($arrFound) || $session['filetree'][$md5] == 1 ? 'folMinus.svg' : 'folPlus.svg';
                $alt = !empty($arrFound) || $session['filetree'][$md5] == 1 ? $GLOBALS['TL_LANG']['MSC']['collapseNode'] : $GLOBALS['TL_LANG']['MSC']['expandNode'];
                $return .= '<a href="' . $this->addToUrl('tg=' . $md5) . '" title="' . \StringUtil::specialchars($alt) . '" onclick="Backend.getScrollOffset(); return AjaxRequest.toggleFileManager(this, \'filetree_' . $md5 . '\', \'' . $currentFolder . '\', ' . $level . ')">' . \Image::getHtml($img, '', 'style="margin-right:2px"') . '</a>';
            }
            $protected = $blnProtected;
            // Check whether the folder is public
            if ($protected === true && array_search('.public', $content) !== false) {
                $protected = false;
            }
            $folderImg = $protected ? 'folderCP.svg' : 'folderC.svg';
            // Add the current folder
            $strFolderNameEncoded = \StringUtil::convertEncoding(\StringUtil::specialchars(basename($currentFolder)), \Config::get('characterSet'));
            $return .= \Image::getHtml($folderImg, '') . ' <a href="' . $this->addToUrl('fn=' . $currentEncoded) . '" title="' . \StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['selectNode']) . '"><strong>' . $strFolderNameEncoded . '</strong></a></div> <div class="tl_right">';
            // Paste buttons
            if ($arrClipboard !== false && \Input::get('act') != 'select') {
                $imagePasteInto = \Image::getHtml('pasteinto.svg', $GLOBALS['TL_LANG'][$this->strTable]['pasteinto'][0]);
                $return .= ($arrClipboard['mode'] == 'cut' || $arrClipboard['mode'] == 'copy') && preg_match('/^' . preg_quote($arrClipboard['id'], '/') . '/i', $currentFolder) ? \Image::getHtml('pasteinto_.svg') : '<a href="' . $this->addToUrl('act=' . $arrClipboard['mode'] . '&amp;mode=2&amp;pid=' . $currentEncoded . (!is_array($arrClipboard['id']) ? '&amp;id=' . $arrClipboard['id'] : '')) . '" title="' . \StringUtil::specialchars($GLOBALS['TL_LANG'][$this->strTable]['pasteinto'][1]) . '" onclick="Backend.getScrollOffset()">' . $imagePasteInto . '</a> ';
            } else {
                // Do not display buttons for mounted folders
                if ($this->User->isAdmin || !in_array($currentFolder, $this->User->filemounts)) {
                    $return .= \Input::get('act') == 'select' ? '<input type="checkbox" name="IDS[]" id="ids_' . md5($currentEncoded) . '" class="tl_tree_checkbox" value="' . $currentEncoded . '">' : $this->generateButtons(array('id' => $currentEncoded, 'popupWidth' => 600, 'popupHeight' => 123, 'fileNameEncoded' => $strFolderNameEncoded), $this->strTable);
                }
                // Upload button
                if (!$GLOBALS['TL_DCA'][$this->strTable]['config']['closed'] && !$GLOBALS['TL_DCA'][$this->strTable]['config']['notCreatable'] && \Input::get('act') != 'select') {
                    $return .= ' <a href="' . $this->addToUrl('&amp;act=move&amp;mode=2&amp;pid=' . $currentEncoded) . '" title="' . \StringUtil::specialchars(sprintf($GLOBALS['TL_LANG']['tl_files']['uploadFF'], $currentEncoded)) . '">' . \Image::getHtml('new.svg', $GLOBALS['TL_LANG'][$this->strTable]['move'][0]) . '</a>';
                }
            }
            $return .= '</div><div style="clear:both"></div></li>';
            // Call the next node
            if (!empty($content) && (!empty($arrFound) || $session['filetree'][$md5] == 1)) {
                $return .= '<li class="parent" id="filetree_' . $md5 . '"><ul class="level_' . $level . '">';
                $return .= $this->generateTree($folders[$f], $intMargin + $intSpacing, false, $protected, $arrClipboard, $arrFound);
                $return .= '</ul></li>';
            }
        }
        // Process files
        for ($h = 0, $c = count($files); $h < $c; $h++) {
            $thumbnail = '';
            $popupWidth = 600;
            $popupHeight = 192;
            $currentFile = str_replace(TL_ROOT . '/', '', $files[$h]);
            $objFile = new \File($currentFile);
            if (!empty($this->arrValidFileTypes) && !in_array($objFile->extension, $this->arrValidFileTypes)) {
                continue;
            }
            // Ignore files not matching the search criteria
            if (!empty($arrFound) && !in_array($currentFile, $arrFound)) {
                continue;
            }
            $currentEncoded = $this->urlEncode($currentFile);
            $return .= "\n  " . '<li class="tl_file click2edit toggle_select hover-div"><div class="tl_left" style="padding-left:' . ($intMargin + $intSpacing) . 'px">';
            $thumbnail .= ' <span class="tl_gray">(' . $this->getReadableSize($objFile->filesize);
            if ($objFile->width && $objFile->height) {
                $thumbnail .= ', ' . $objFile->width . 'x' . $objFile->height . ' px';
            }
            $thumbnail .= ')</span>';
            // Generate the thumbnail
            if ($objFile->isImage) {
                if ($objFile->viewHeight > 0) {
                    if ($objFile->width && $objFile->height) {
                        $popupWidth = $objFile->width > 600 ? $objFile->width + 61 : 661;
                        $popupHeight = $objFile->height + 236;
                    } else {
                        $popupWidth = 661;
                        $popupHeight = 625 / $objFile->viewWidth * $objFile->viewHeight + 236;
                    }
                    if (\Config::get('thumbnails') && ($objFile->isSvgImage || $objFile->height <= \Config::get('gdMaxImgHeight') && $objFile->width <= \Config::get('gdMaxImgWidth'))) {
                        $thumbnail .= '<br>' . \Image::getHtml(\System::getContainer()->get('contao.image.image_factory')->create(TL_ROOT . '/' . rawurldecode($currentEncoded), array(400, 50, 'box'))->getUrl(TL_ROOT), '', 'style="margin:0 0 2px -19px"');
                        $importantPart = \System::getContainer()->get('contao.image.image_factory')->create(TL_ROOT . '/' . rawurldecode($currentEncoded))->getImportantPart();
                        if ($importantPart->getPosition()->getX() > 0 || $importantPart->getPosition()->getY() > 0 || $importantPart->getSize()->getWidth() < $objFile->width || $importantPart->getSize()->getHeight() < $objFile->height) {
                            $thumbnail .= ' ' . \Image::getHtml(\System::getContainer()->get('contao.image.image_factory')->create(TL_ROOT . '/' . rawurldecode($currentEncoded), (new ResizeConfiguration())->setWidth(320)->setHeight(40)->setMode(ResizeConfiguration::MODE_BOX)->setZoomLevel(100))->getUrl(TL_ROOT), '', 'style="margin:0 0 2px 0;vertical-align:bottom"');
                        }
                    }
                } else {
                    $popupHeight = 386;
                    // dimensionless SVGs are rendered at 300x150px, so the popup needs to be 150px + 236px high
                }
            }
            $strFileNameEncoded = \StringUtil::convertEncoding(\StringUtil::specialchars(basename($currentFile)), \Config::get('characterSet'));
            // No popup links for templates and in the popup file manager
            if ($this->strTable == 'tl_templates' || \Input::get('popup')) {
                $return .= \Image::getHtml($objFile->icon) . ' ' . $strFileNameEncoded . $thumbnail . '</div> <div class="tl_right">';
            } else {
                $return .= '<a href="' . $currentEncoded . '" title="' . \StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['view']) . '" target="_blank">' . \Image::getHtml($objFile->icon, $objFile->mime) . '</a> ' . $strFileNameEncoded . $thumbnail . '</div> <div class="tl_right">';
            }
            // Buttons
            if ($arrClipboard !== false && \Input::get('act') != 'select') {
                $_buttons = '&nbsp;';
            } else {
                $_buttons = \Input::get('act') == 'select' ? '<input type="checkbox" name="IDS[]" id="ids_' . md5($currentEncoded) . '" class="tl_tree_checkbox" value="' . $currentEncoded . '">' : $this->generateButtons(array('id' => $currentEncoded, 'popupWidth' => $popupWidth, 'popupHeight' => $popupHeight, 'fileNameEncoded' => $strFileNameEncoded), $this->strTable);
            }
            $return .= $_buttons . '</div><div style="clear:both"></div></li>';
        }
        return $return;
    }