/**
* Public function that creates a single instance
*/
public static function getInstance()
{
if (!isset(self::$_instance)) {
self::$_instance = new self();
}
return self::$_instance;
}
/**
* Method called by the page module to add elements before printing
*/
public function addElements()
{
global $section, $db_use, $optimize_code, $url_rewrite;
$head_tag = head_tag::getInstance();
$collection = collection::getInstance();
$language_handler = MainLanguageHandler::getInstance();
$default_language = $language_handler->getDefaultLanguage();
$language_list = $language_handler->getLanguages(false);
// add base url tag
$head_tag->addTag('base', array('href' => _BASEURL));
// add mobile menu script
if (_MOBILE_VERSION && !in_array('mobile_menu', $this->omit_elements)) {
$collection->includeScript(collection::MOBILE_MENU);
}
// content meta tags
if (!in_array('content_type', $this->omit_elements)) {
$head_tag->addTag('meta', array('http-equiv' => 'Content-Type', 'content' => 'text/html; charset=UTF-8'));
}
if (!in_array('viewport', $this->omit_elements) && _MOBILE_VERSION) {
$head_tag->addTag('meta', array('name' => 'viewport', 'content' => 'width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0'));
}
if (!in_array('language', $this->omit_elements) && _STANDARD == 'html401') {
$head_tag->addTag('meta', array('http-equiv' => 'Content-Language', 'content' => join(', ', $language_list)));
}
// add other languages if required
if (count($language_list) > 1 && $url_rewrite && class_exists('language_menu')) {
language_menu::getInstance()->addMeta();
}
// robot tags
$head_tag->addTag('meta', array('name' => 'robots', 'content' => 'index, follow'));
$head_tag->addTag('meta', array('name' => 'googlebot', 'content' => 'index, follow'));
$head_tag->addTag('meta', array('name' => 'rating', 'content' => 'general'));
if ($section != 'backend' && $section != 'backend_module' && $db_use) {
// google analytics
if (!empty($this->settings['analytics'])) {
$head_tag->addGoogleAnalytics($this->settings['analytics'], $this->settings['analytics_domain'], $this->settings['analytics_version']);
}
// google website optimizer
if (!empty($this->settings['optimizer'])) {
$head_tag->addGoogleSiteOptimizer($this->settings['optimizer'], $this->settings['optimizer_key'], $this->optimizer_page, $this->optimizer_show_control);
}
// google webmaster tools
if (!empty($this->settings['wm_tools'])) {
$head_tag->addTag('meta', array('name' => 'google-site-verification', 'content' => $this->settings['wm_tools']));
}
// bing webmaster tools
if (!empty($this->settings['bing_wm_tools'])) {
$head_tag->addTag('meta', array('name' => 'msvalidate.01', 'content' => $this->settings['bing_wm_tools']));
}
// page description
if ($db_use) {
if (!is_null($this->page_description)) {
$value = $this->page_description;
} else {
$value = $this->settings['description'];
}
}
$head_tag->addTag('meta', array('name' => 'description', 'content' => $value));
}
// copyright
if (!in_array('copyright', $this->omit_elements) && _STANDARD == 'html401') {
$copyright = MainLanguageHandler::getInstance()->getText('copyright');
$copyright = strip_tags($copyright);
$head_tag->addTag('meta', array('name' => 'copyright', 'content' => $copyright));
}
// favicon
if (file_exists(_BASEPATH . '/images/favicon.png')) {
// regular, single size favicon
$icon_files = array('16x16' => _BASEPATH . '/images/favicon.png');
} else {
if (file_exists(_BASEPATH . '/images/favicon')) {
$icon_sizes = array(16, 32, 64);
$icon_files = array();
foreach ($icon_sizes as $size) {
$file_name = _BASEPATH . '/images/favicon/' . $size . '.png';
if (file_exists($file_name)) {
$icon_files[$size . 'x' . $size] = $file_name;
}
}
} else {
$icon_files = array('16x16' => _BASEPATH . '/images/default_icon/16.png', '32x32' => _BASEPATH . '/images/default_icon/32.png', '64x64' => _BASEPATH . '/images/default_icon/64.png');
}
}
foreach ($icon_files as $sizes => $icon) {
$head_tag->addTag('link', array('rel' => 'icon', 'type' => 'image/png', 'sizes' => $sizes, 'href' => url_GetFromFilePath($icon)));
}
// add default styles and script if they exists
$collection->includeScript(collection::JQUERY);
if ($section != 'backend') {
$styles = array();
$less_style = null;
// prepare list of files without extensions
if (_DESKTOP_VERSION) {
$styles = array('/styles/common.css', '/styles/main.css', '/styles/header.css', '/styles/content.css', '/styles/footer.css');
$less_style = '/styles/main.less';
} else {
$styles = array('/styles/common.css', '/styles/main.css', '/styles/header_mobile.css', '/styles/content_mobile.css', '/styles/footer_mobile.css');
$less_style = '/styles/main_mobile.less';
}
// include styles
foreach ($styles as $style) {
// check for css files
if (file_exists(_BASEPATH . $style)) {
$head_tag->addTag('link', array('rel' => 'stylesheet', 'type' => 'text/css', 'href' => url_GetFromFilePath(_BASEPATH . $style)));
}
}
// add main less file if it exists
if (file_exists(_BASEPATH . $less_style)) {
$head_tag->addTag('link', array('rel' => 'stylesheet/less', 'type' => 'text/css', 'href' => url_GetFromFilePath(_BASEPATH . $less_style)));
if (!$optimize_code) {
$collection->includeScript(collection::LESS);
}
}
// add main javascript
if (file_exists(_BASEPATH . '/scripts/main.js')) {
$head_tag->addTag('script', array('type' => 'text/javascript', 'src' => url_GetFromFilePath(_BASEPATH . '/scripts/main.js')));
}
}
}