get(__CLASS__, 'disable_flush_combined');
if(!$disabled) {
self::delete_all_combined_files();
}
}
/**
* Enable combining of css/javascript files.
*
* @param bool $enable
*/
public static function set_combined_files_enabled($enable) {
self::backend()->set_combined_files_enabled($enable);
}
/**
* Checks whether combining of css/javascript files is enabled.
*
* @return bool
*/
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($folder);
}
/**
* Set whether to add caching query params to the requests for file-based requirements.
* Eg: themes/myTheme/js/main.js?m=123456789. The parameter is a timestamp generated by
* filemtime. This has the benefit of allowing the browser to cache the URL infinitely,
* while automatically busting this cache every time the file is changed.
*
* @param bool
*/
public static function set_suffix_requirements($var) {
self::backend()->set_suffix_requirements($var);
}
/**
* Check whether we want to suffix requirements
*
* @return bool
*/
public static function get_suffix_requirements() {
return self::backend()->get_suffix_requirements();
}
/**
* Instance of the requirements for storage. You can create your own backend to change the
* default JS and CSS inclusion behaviour.
*
* @var Requirements_Backend
*/
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 $backend
*/
public static function set_backend(Requirements_Backend $backend) {
self::$backend = $backend;
}
/**
* Register the given JavaScript file as required.
*
* @param string $file Relative to docroot
*/
public static function javascript($file) {
self::backend()->javascript($file);
}
/**
* Register the given JavaScript code into the list of requirements
*
* @param string $script The script content as a string (without enclosing \n";
}
}
// Add all inline JavaScript *after* including external files they might rely on
if($this->customScript) {
foreach(array_diff_key($this->customScript,$this->blocked) as $script) {
$jsRequirements .= "\n";
}
}
foreach(array_diff_key($this->css,$this->blocked) as $file => $params) {
$path = Convert::raw2xml($this->path_for_file($file));
if($path) {
$media = (isset($params['media']) && !empty($params['media']))
? " media=\"{$params['media']}\"" : "";
$requirements .= "\n";
}
}
foreach(array_diff_key($this->customCSS, $this->blocked) as $css) {
$requirements .= "\n";
}
foreach(array_diff_key($this->customHeadTags,$this->blocked) as $customHeadTag) {
$requirements .= "$customHeadTag\n";
}
$replacements = array();
if ($this->force_js_to_bottom) {
$jsRequirements = $this->removeNewlinesFromCode($jsRequirements);
// Forcefully put the scripts at the bottom of the body instead of before the first
// script tag.
$replacements["/(<\/body[^>]*>)/i"] = $this->escapeReplacement($jsRequirements) . "\\1";
// Put CSS at the bottom of the head
$replacements["/(<\/head>)/i"] = $this->escapeReplacement($requirements) . "\\1";
} elseif ($this->write_js_to_body) {
$jsRequirements = $this->removeNewlinesFromCode($jsRequirements);
// If your template already has script tags in the body, then we try to put our script
// tags just before those. Otherwise, we put it at the bottom.
$p2 = stripos($content, '))/U', $content, $commentTags, 0, $p1)
&&
$commentTags[1] == '-->'
);
if ($canWriteToBody) {
$content = substr($content, 0, $p1) . $jsRequirements . substr($content, $p1);
} else {
$replacements["/(<\/body[^>]*>)/i"] = $this->escapeReplacement($jsRequirements) . "\\1";
}
// Put CSS at the bottom of the head
$replacements["/(<\/head>)/i"] = $this->escapeReplacement($requirements) . "\\1";
} else {
// Put CSS and Javascript together before the closing head tag
$replacements["/(<\/head>)/i"] = $this->escapeReplacement($requirements . $jsRequirements) . "\\1";
}
if (!empty($replacements)) {
// Replace everything at once (only once)
$content = preg_replace(array_keys($replacements), array_values($replacements), $content, 1);
}
}
return $content;
}
/**
* Remove all newlines from code to preserve layout
*
* @param string $code
* @return string
*/
protected function removeNewlinesFromCode($code) {
return preg_replace('/>\n*/', '>', $code);
}
/**
* Safely escape a literal string for use in preg_replace replacement
*
* @param string $replacement
* @return string
*/
protected function escapeReplacement($replacement) {
return addcslashes($replacement, '\\$');
}
/**
* Attach requirements inclusion to X-Include-JS and X-Include-CSS headers on the given
* HTTP Response
*
* @param SS_HTTPResponse $response
*/
public 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 JavaScript files named by language: en_US.js, de_DE.js,
* etc.
*
* @param string $langDir The JavaScript lang directory, relative to the site root, e.g.,
* 'framework/javascript/lang'
* @param bool $return Return all relative file paths rather than including them in
* requirements
* @param bool $langOnly Only include language files, not the base libraries
*
* @return array
*/
public function add_i18n_javascript($langDir, $return = false, $langOnly = false) {
$files = array();
$base = Director::baseFolder() . '/';
if(i18n::config()->js_i18n) {
// Include i18n.js even if no languages are found. The fact that
// add_i18n_javascript() was called indicates that the methods in
// here are needed.
if(!$langOnly) $files[] = FRAMEWORK_DIR . '/javascript/i18n.js';
if(substr($langDir,-1) != '/') $langDir .= '/';
$candidates = array(
'en.js',
'en_US.js',
i18n::get_lang_from_locale(i18n::default_locale()) . '.js',
i18n::default_locale() . '.js',
i18n::get_lang_from_locale(i18n::get_locale()) . '.js',
i18n::get_locale() . '.js',
);
foreach($candidates as $candidate) {
if(file_exists($base . DIRECTORY_SEPARATOR . $langDir . $candidate)) {
$files[] = $langDir . $candidate;
}
}
} else {
// Stub i18n implementation for when i18n is disabled.
if(!$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 $fileOrUrl
* @return string|bool
*/
protected function path_for_file($fileOrUrl) {
if(preg_match('{^//|http[s]?}', $fileOrUrl)) {
return $fileOrUrl;
} elseif(Director::fileExists($fileOrUrl)) {
$filePath = preg_replace('/\?.*/', '', Director::baseFolder() . '/' . $fileOrUrl);
$prefix = Director::baseURL();
$mtimesuffix = "";
$suffix = '';
if($this->suffix_requirements) {
$mtimesuffix = "?m=" . filemtime($filePath);
$suffix = '&';
}
if(strpos($fileOrUrl, '?') !== false) {
if (strlen($suffix) == 0) {
$suffix = '?';
}
$suffix .= substr($fileOrUrl, strpos($fileOrUrl, '?')+1);
$fileOrUrl = substr($fileOrUrl, 0, strpos($fileOrUrl, '?'));
} else {
$suffix = '';
}
return "{$prefix}{$fileOrUrl}{$mtimesuffix}{$suffix}";
} else {
return false;
}
}
/**
* Concatenate several css or javascript files into a single dynamically generated file. 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 using {@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 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 incorrect inheritance. You can also
* only include each file once across all includes and combinations in a single page load.
*
* 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',
* )
* );
*
*
* @param string $combinedFileName Filename of the combined file relative to docroot
* @param array $files Array of filenames relative to docroot
* @param string $media
*
* @return bool|void
*/
public function combine_files($combinedFileName, $files, $media = null) {
// duplicate check
foreach($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']) && in_array($file['type'], array('css', 'javascript', 'js'))) {
switch ($file['type']) {
case 'css':
$this->css($file['path'], $media);
break;
default:
$this->javascript($file['path']);
break;
}
$files[$index] = $file['path'];
} elseif (isset($file[1]) && in_array($file[1], array('css', 'javascript', 'js'))) {
switch ($file[1]) {
case 'css':
$this->css($file[0], $media);
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, $media);
} else {
user_error("Requirements_Backend::combine_files(): Couldn't guess file type for file '$file', "
. "please specify by passing using an array instead.", E_USER_NOTICE);
}
}
}
$this->combine_files[$combinedFileName] = $files;
}
/**
* Return all combined files; keys are the combined file names, values are lists of
* files being combined.
*
* @return array
*/
public function get_combine_files() {
return $this->combine_files;
}
/**
* Delete all dynamically generated combined files from the filesystem
*
* @param string $combinedFileName If left blank, all combined files are deleted.
*/
public function delete_combined_files($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);
}
}
}
/**
* Deletes all generated combined files in the configured combined files directory,
* but doesn't delete the directory itself.
*/
public function delete_all_combined_files() {
$combinedFolder = $this->getCombinedFilesFolder();
if(!$combinedFolder) return false;
$path = Director::baseFolder() . '/' . $combinedFolder;
if(file_exists($path)) {
Filesystem::removeFolder($path, true);
}
}
/**
* Clear all registered CSS and JavaScript file combinations
*/
public function clear_combined_files() {
$this->combine_files = array();
}
/**
* Do the heavy lifting involved in combining (and, in the case of JavaScript minifying) the
* combined files.
*/
public function process_combined_files() {
// The class_exists call prevents us 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 request
$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])) {
// Inherit the parameters from the last file in the combine set.
$newCSSRequirements[$combinedFilesFolder . $combinerCheck[$file]] = $params;
$combinedFiles[$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($combinedFilePath));
}
// If the file isn't writeable, don't even bother trying to make the combined file and return. The
// files will be included individually instead. This is a complex test because is_writable fails
// if the file doesn't exist yet.
if((file_exists($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);
return false;
}
// Determine if we need to build the combined include
if(file_exists($combinedFilePath)) {
// file exists, check modification date of every contained file
$srcLastMod = 0;
foreach($fileList as $file) {
if(file_exists($base . $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;
$failedToMinify = false;
$combinedData = "";
foreach(array_diff($fileList, $this->blocked) as $file) {
$fileContent = file_get_contents($base . $file);
try{
$fileContent = $this->minifyFile($file, $fileContent);
}catch(Exception $e){
$failedToMinify = true;
}
if ($this->write_header_comment) {
// Write a header comment for each file for easier identification and debugging. The semicolon between each file is required for jQuery to be combined properly and protects against unterminated statements.
$combinedData .= "/****** FILE: $file *****/\n";
}
$combinedData .= $fileContent . "\n";
}
$successfulWrite = false;
$fh = fopen($combinedFilePath, 'wb');
if($fh) {
if(fwrite($fh, $combinedData) == strlen($combinedData)) $successfulWrite = true;
fclose($fh);
unset($fh);
}
if($failedToMinify){
// Failed to minify, use unminified files instead. This warning is raised at the end to allow code execution
// to complete in case this warning is caught inside a try-catch block.
user_error('Failed to minify '.$file.', exception: '.$e->getMessage(), E_USER_WARNING);
}
// 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;
}
}
// Note: Alters the original information, which means you can't call this method repeatedly - it will behave
// differently on the subsequent calls
$this->javascript = $newJSRequirements;
$this->css = $newCSSRequirements;
}
/**
* Minify the given $content according to the file type indicated in $filename
*
* @param string $filename
* @param string $content
* @return string
*/
protected function minifyFile($filename, $content) {
// if we have a javascript file and jsmin is enabled, minify the content
$isJS = stripos($filename, '.js');
if($isJS && $this->combine_js_with_jsmin) {
require_once('thirdparty/jsmin/jsmin.php');
increase_time_limit_to();
$content = JSMin::minify($content);
}
$content .= ($isJS ? ';' : '') . "\n";
return $content;
}
/**
* Registers the given themeable stylesheet as required.
*
* A CSS file in the current theme path name 'themename/css/$name.css' is first searched for,
* and it that doesn't exist and the module parameter is set then a CSS file with that name in
* the module is used.
*
* @param string $name The name of the file - eg '/css/File.css' would have the name 'File'
* @param string $module The module to fall back to if the css file does not exist in the
* current theme.
* @param string $media Comma-separated list of media types to use in the link tag
* (e.g. 'screen,projector')
*/
public function themedCSS($name, $module = null, $media = null) {
$theme = SSViewer::get_theme_folder();
$project = project();
$absbase = BASE_PATH . DIRECTORY_SEPARATOR;
$abstheme = $absbase . $theme;
$absproject = $absbase . $project;
$css = "/css/$name.css";
if(file_exists($absproject . $css)) {
$this->css($project . $css, $media);
} elseif($module && file_exists($abstheme . '_' . $module.$css)) {
$this->css($theme . '_' . $module . $css, $media);
} elseif(file_exists($abstheme . $css)) {
$this->css($theme . $css, $media);
} elseif($module) {
$this->css($module . $css, $media);
}
}
/**
* Registers the given themeable javascript as required.
*
* A javascript file in the current theme path name 'themename/javascript/$name.js' is first searched for,
* and it that doesn't exist and the module parameter is set then a javascript file with that name in
* the module is used.
*
* @param string $name The name of the file - eg '/js/File.js' would have the name 'File'
* @param string $module The module to fall back to if the javascript file does not exist in the
* current theme.
* @param string $type Comma-separated list of types to use in the script tag
* (e.g. 'text/javascript,text/ecmascript')
*/
public function themedJavascript($name, $module = null, $type = null) {
$theme = SSViewer::get_theme_folder();
$project = project();
$absbase = BASE_PATH . DIRECTORY_SEPARATOR;
$abstheme = $absbase . $theme;
$absproject = $absbase . $project;
$js = "/javascript/$name.js";
if(file_exists($absproject . $js)) {
$this->javascript($project . $js);
} elseif($module && file_exists($abstheme . '_' . $module.$js)) {
$this->javascript($theme . '_' . $module . $js);
} elseif(file_exists($abstheme . $js)) {
$this->javascript($theme . $js);
} elseif($module) {
$this->javascript($module . $js);
}
}
/**
* Output debugging information.
*/
public function debug() {
Debug::show($this->javascript);
Debug::show($this->css);
Debug::show($this->customCSS);
Debug::show($this->customScript);
Debug::show($this->customHeadTags);
Debug::show($this->combine_files);
}
}