set_combined_files_enabled($enable);
}
/**
* Checks whether combining of css/javascript files is enabled.
* @return boolean
*/
public static function get_combined_files_enabled() {
return self::backend()->get_combined_files_enabled();
}
/**
* Set the relative folder e.g. "assets" for where to store combined files
* @param string $folder Path to folder
*/
public static function set_combined_files_folder($folder) {
self::backend()->setCombinedFilesFolder($folder);
}
/**
* Set whether we want to suffix requirements with the time /
* location on to the requirements
*
* @param bool
*/
public static function set_suffix_requirements($var) {
self::backend()->set_suffix_requirements($var);
}
/**
* Return whether we want to suffix requirements
*
* @return bool
*/
public static function get_suffix_requirements() {
return self::backend()->get_suffix_requirements();
}
/**
* Instance of requirements for storage
*
* @var Requirements
*/
private static $backend = null;
public static function backend() {
if(!self::$backend) {
self::$backend = new Requirements_Backend();
}
return self::$backend;
}
/**
* Setter method for changing the Requirements backend
*
* @param Requirements $backend
*/
public static function set_backend(Requirements_Backend $backend) {
self::$backend = $backend;
}
/**
* Register the given javascript file as required.
*
* See {@link Requirements_Backend::javascript()} for more info
*
*/
static function javascript($file) {
self::backend()->javascript($file);
}
/**
* Add the javascript code to the header of the page
*
* See {@link Requirements_Backend::customScript()} for more info
* @param script The script content
* @param uniquenessID Use this to ensure that pieces of code only get added once.
*/
static function customScript($script, $uniquenessID = null) {
self::backend()->customScript($script, $uniquenessID);
}
/**
* Include custom CSS styling to the header of the page.
*
* See {@link Requirements_Backend::customCSS()}
*
* @param string $script CSS selectors as a string (without \n";
}
foreach(array_diff_key($this->customHeadTags,$this->blocked) as $customHeadTag) {
$requirements .= "$customHeadTag\n";
}
if($this->write_js_to_body) {
// Remove all newlines from code to preserve layout
$jsRequirements = preg_replace('/>\n*/', '>', $jsRequirements);
// We put script tags into the body, for performance.
// If your template already has script tags in the body, then we put our script
// tags just before those. Otherwise, we put it at the bottom.
$p2 = stripos($content, ']*>)/i", $jsRequirements . "\\1", $content);
}
// Put CSS at the bottom of the head
$content = preg_replace("/(<\/head>)/i", $requirements . "\\1", $content);
} else {
$content = preg_replace("/(<\/head>)/i", $requirements . "\\1", $content);
$content = preg_replace("/(<\/head>)/i", $jsRequirements . "\\1", $content);
}
}
return $content;
}
/**
* Attach requirements inclusion to X-Include-JS and X-Include-CSS headers on the HTTP response
*/
function include_in_response(SS_HTTPResponse $response) {
$this->process_combined_files();
$jsRequirements = array();
$cssRequirements = array();
foreach(array_diff_key($this->javascript, $this->blocked) as $file => $dummy) {
$path = $this->path_for_file($file);
if($path) {
$jsRequirements[] = str_replace(',', '%2C', $path);
}
}
$response->addHeader('X-Include-JS', implode(',', $jsRequirements));
foreach(array_diff_key($this->css,$this->blocked) as $file => $params) {
$path = $this->path_for_file($file);
if($path) {
$path = str_replace(',', '%2C', $path);
$cssRequirements[] = isset($params['media']) ? "$path:##:$params[media]" : $path;
}
}
$response->addHeader('X-Include-CSS', implode(',', $cssRequirements));
}
/**
* Add i18n files from the given javascript directory. SilverStripe expects that the given directory
* will contain a number of java script files named by language: en_US.js, de_DE.js, etc.
*
* @param String The javascript lang directory, relative to the site root, e.g., 'framework/javascript/lang'
* @param Boolean Return all relative file paths rather than including them in requirements
* @param Boolean Only include language files, not the base libraries
*/
public function add_i18n_javascript($langDir, $return = false, $langOnly = false) {
$files = array();
if(i18n::get_js_i18n()) {
// Include i18n.js even if no languages are found. The fact that
// add_i18n_javascript() was called indicates that the methods in
// here are needed.
if(!$langOnly) $files[] = FRAMEWORK_DIR . '/javascript/i18n.js';
if(substr($langDir,-1) != '/') $langDir .= '/';
$files[] = $langDir . i18n::default_locale() . '.js';
$files[] = $langDir . i18n::get_locale() . '.js';
// Stub i18n implementation for when i18n is disabled.
} else {
if(!$langOnly) $files[] = FRAMEWORK_DIR . '/javascript/i18nx.js';
}
if($return) {
return $files;
} else {
foreach($files as $file) $this->javascript($file);
}
}
/**
* Finds the path for specified file.
*
* @param string $fileOrUrl
* @return string|boolean
*/
protected function path_for_file($fileOrUrl) {
if(preg_match('{^//|http[s]?}', $fileOrUrl)) {
return $fileOrUrl;
} elseif(Director::fileExists($fileOrUrl)) {
$prefix = Director::baseURL();
$mtimesuffix = "";
$suffix = '';
if(strpos($fileOrUrl, '?') !== false) {
$suffix = '&' . substr($fileOrUrl, strpos($fileOrUrl, '?')+1);
$fileOrUrl = substr($fileOrUrl, 0, strpos($fileOrUrl, '?'));
}
if($this->suffix_requirements) {
$mtimesuffix = "?m=" . filemtime(Director::baseFolder() . '/' . $fileOrUrl);
}
return "{$prefix}{$fileOrUrl}{$mtimesuffix}{$suffix}";
} else {
return false;
}
}
/**
* Concatenate several css or javascript files into a single dynamically generated
* file (stored in {@link Director::baseFolder()}). This increases performance
* by fewer HTTP requests.
*
* The combined file is regenerated
* based on every file modification time. Optionally a rebuild can be triggered
* by appending ?flush=1 to the URL.
* If all files to be combined are javascript, we use the external JSMin library
* to minify the javascript. This can be controlled by {@link $combine_js_with_jsmin}.
*
* All combined files will have a comment on the start of each concatenated file
* denoting their original position. For easier debugging, we recommend to only
* minify javascript if not in development mode ({@link Director::isDev()}).
*
* CAUTION: You're responsible for ensuring that the load order for combined files
* is retained - otherwise combining javascript files can lead to functional errors
* in the javascript logic, and combining css can lead to wrong styling inheritance.
* Depending on the javascript logic, you also have to ensure that files are not included
* in more than one combine_files() call.
* Best practice is to include every javascript file in exactly *one* combine_files()
* directive to avoid the issues mentioned above - this is enforced by this function.
*
* CAUTION: Combining CSS Files discards any "media" information.
*
* Example for combined JavaScript:
*
* Requirements::combine_files(
* 'foobar.js',
* array(
* 'mysite/javascript/foo.js',
* 'mysite/javascript/bar.js',
* )
* );
*
*
* Example for combined CSS:
*
* Requirements::combine_files(
* 'foobar.css',
* array(
* 'mysite/javascript/foo.css',
* 'mysite/javascript/bar.css',
* )
* );
*
*
* @see http://code.google.com/p/jsmin-php/
*
* @todo Should we enforce unique inclusion of files, or leave it to the developer? Can auto-detection cause breaks?
*
* @param string $combinedFileName Filename of the combined file (will be stored in {@link Director::baseFolder()} by default)
* @param array $files Array of filenames relative to the webroot
*/
function combine_files($combinedFileName, $files) {
// duplicate check
foreach($this->combine_files as $_combinedFileName => $_files) {
$duplicates = array_intersect($_files, $files);
if($duplicates && $combinedFileName != $_combinedFileName) {
user_error("Requirements_Backend::combine_files(): Already included files " . implode(',', $duplicates) . " in combined file '{$_combinedFileName}'", E_USER_NOTICE);
return false;
}
}
foreach($files as $index=>$file) {
if(is_array($file)) {
// Either associative array path=>path type=>type or numeric 0=>path 1=>type
// Otherwise, assume path is the first item
if (isset($file['type']) && ($file['type'] == 'css' || $file['type'] == 'javascript' || $file['type'] == 'js')) {
switch ($file['type']) {
case 'css':
$this->css($file['path']);
break;
default:
$this->javascript($file['path']);
break;
}
$files[$index] = $file['path'];
} elseif (isset($file[1]) && ($file[1] == 'css' || $file[1] == 'javascript' || $file[1] == 'js')) {
switch ($file[1]) {
case 'css':
$this->css($file[0]);
break;
default:
$this->javascript($file[0]);
break;
}
$files[$index] = $file[0];
} else {
$file = array_shift($file);
}
}
if (!is_array($file)) {
if(substr($file, -2) == 'js') {
$this->javascript($file);
} elseif(substr($file, -3) == 'css') {
$this->css($file);
} else {
user_error("Requirements_Backend::combine_files(): Couldn't guess file type for file '$file', please specify by passing using an array instead.", E_USER_NOTICE);
}
}
}
$this->combine_files[$combinedFileName] = $files;
}
/**
* Returns all combined files.
* @return array
*/
function get_combine_files() {
return $this->combine_files;
}
/**
* Deletes all dynamically generated combined files from the filesystem.
*
* @param string $combinedFileName If left blank, all combined files are deleted.
*/
function delete_combined_files($combinedFileName = null) {
$combinedFiles = ($combinedFileName) ? array($combinedFileName => null) : $this->combine_files;
$combinedFolder = ($this->getCombinedFilesFolder()) ? (Director::baseFolder() . '/' . $this->combinedFilesFolder) : Director::baseFolder();
foreach($combinedFiles as $combinedFile => $sourceItems) {
$filePath = $combinedFolder . '/' . $combinedFile;
if(file_exists($filePath)) {
unlink($filePath);
}
}
}
function clear_combined_files() {
$this->combine_files = array();
}
/**
* See {@link combine_files()}
*
*/
function process_combined_files() {
// The class_exists call prevents us from loading SapphireTest.php (slow) just to know that
// SapphireTest isn't running :-)
if(class_exists('SapphireTest', false)) $runningTest = SapphireTest::is_running_test();
else $runningTest = false;
if((Director::isDev() && !$runningTest && !isset($_REQUEST['combine'])) || !$this->combined_files_enabled) {
return;
}
// Make a map of files that could be potentially combined
$combinerCheck = array();
foreach($this->combine_files as $combinedFile => $sourceItems) {
foreach($sourceItems as $sourceItem) {
if(isset($combinerCheck[$sourceItem]) && $combinerCheck[$sourceItem] != $combinedFile){
user_error("Requirements_Backend::process_combined_files - file '$sourceItem' appears in two combined files:" . " '{$combinerCheck[$sourceItem]}' and '$combinedFile'", E_USER_WARNING);
}
$combinerCheck[$sourceItem] = $combinedFile;
}
}
// Work out the relative URL for the combined files from the base folder
$combinedFilesFolder = ($this->getCombinedFilesFolder()) ? ($this->getCombinedFilesFolder() . '/') : '';
// Figure out which ones apply to this pageview
$combinedFiles = array();
$newJSRequirements = array();
$newCSSRequirements = array();
foreach($this->javascript as $file => $dummy) {
if(isset($combinerCheck[$file])) {
$newJSRequirements[$combinedFilesFolder . $combinerCheck[$file]] = true;
$combinedFiles[$combinerCheck[$file]] = true;
} else {
$newJSRequirements[$file] = true;
}
}
foreach($this->css as $file => $params) {
if(isset($combinerCheck[$file])) {
$newCSSRequirements[$combinedFilesFolder . $combinerCheck[$file]] = true;
$combinedFiles[$combinerCheck[$file]] = true;
} else {
$newCSSRequirements[$file] = $params;
}
}
// Process the combined files
$base = Director::baseFolder() . '/';
foreach(array_diff_key($combinedFiles, $this->blocked) as $combinedFile => $dummy) {
$fileList = $this->combine_files[$combinedFile];
$combinedFilePath = $base . $combinedFilesFolder . '/' . $combinedFile;
// Make the folder if necessary
if(!file_exists(dirname($combinedFilePath))) {
Filesystem::makeFolder(dirname($combinedFilePath));
}
// If the file isn't writebale, don't even bother trying to make the combined file
// Complex test because is_writable fails if the file doesn't exist yet.
if((file_exists($combinedFilePath) && !is_writable($combinedFilePath)) ||
(!file_exists($combinedFilePath) && !is_writable(dirname($combinedFilePath)))) {
user_error("Requirements_Backend::process_combined_files(): Couldn't create '$combinedFilePath'", E_USER_WARNING);
continue;
}
// Determine if we need to build the combined include
if(file_exists($combinedFilePath) && !isset($_GET['flush'])) {
// file exists, check modification date of every contained file
$srcLastMod = 0;
foreach($fileList as $file) {
$srcLastMod = max(filemtime($base . $file), $srcLastMod);
}
$refresh = $srcLastMod > filemtime($combinedFilePath);
} else {
// file doesn't exist, or refresh was explicitly required
$refresh = true;
}
if(!$refresh) continue;
$combinedData = "";
foreach(array_diff($fileList, $this->blocked) as $file) {
$fileContent = file_get_contents($base . $file);
// if we have a javascript file and jsmin is enabled, minify the content
$isJS = stripos($file, '.js');
if($isJS && $this->combine_js_with_jsmin) {
require_once('thirdparty/jsmin/jsmin.php');
increase_time_limit_to();
$fileContent = JSMin::minify($fileContent);
}
// write a header comment for each file for easier identification and debugging
// also the semicolon between each file is required for jQuery to be combinable properly
$combinedData .= "/****** FILE: $file *****/\n" . $fileContent . "\n".($isJS ? ';' : '')."\n";
}
$successfulWrite = false;
$fh = fopen($combinedFilePath, 'wb');
if($fh) {
if(fwrite($fh, $combinedData) == strlen($combinedData)) $successfulWrite = true;
fclose($fh);
unset($fh);
}
// Unsuccessful write - just include the regular JS files, rather than the combined one
if(!$successfulWrite) {
user_error("Requirements_Backend::process_combined_files(): Couldn't create '$combinedFilePath'", E_USER_WARNING);
continue;
}
}
// @todo Alters the original information, which means you can't call this
// method repeatedly - it will behave different on the second call!
$this->javascript = $newJSRequirements;
$this->css = $newCSSRequirements;
}
function get_custom_scripts() {
$requirements = "";
if($this->customScript) {
foreach($this->customScript as $script) {
$requirements .= "$script\n";
}
}
return $requirements;
}
/**
* @see Requirements::themedCSS()
*/
public function themedCSS($name, $module = null, $media = null) {
$path = SSViewer::get_theme_folder();
$abspath = BASE_PATH . DIRECTORY_SEPARATOR . $path;
$css = "/css/$name.css";
if ($module && file_exists($abspath.'_'.$module.$css)) {
$this->css($path.'_'.$module.$css, $media);
}
else if (file_exists($abspath.$css)) {
$this->css($path.$css, $media);
}
else if ($module) {
$this->css($module.$css);
}
}
function debug() {
Debug::show($this->javascript);
Debug::show($this->css);
Debug::show($this->customCSS);
Debug::show($this->customScript);
Debug::show($this->customHeadTags);
Debug::show($this->combine_files);
}
}