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Diffstat (limited to 'library/Icinga/Web/StyleSheet.php')
| -rw-r--r-- | library/Icinga/Web/StyleSheet.php | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/library/Icinga/Web/StyleSheet.php b/library/Icinga/Web/StyleSheet.php new file mode 100644 index 0000000..65cbb97 --- /dev/null +++ b/library/Icinga/Web/StyleSheet.php @@ -0,0 +1,342 @@ +<?php +/* Icinga Web 2 | (c) 2014 Icinga Development Team | GPLv2+ */ + +namespace Icinga\Web; + +use Exception; +use Icinga\Application\Icinga; +use Icinga\Application\Logger; +use Icinga\Authentication\Auth; +use Icinga\Exception\IcingaException; + +/** + * Send CSS for Web 2 and all loaded modules to the client + */ +class StyleSheet +{ + /** + * The name of the default theme + * + * @var string + */ + const DEFAULT_THEME = 'Icinga'; + + /** + * The name of the default theme mode + * + * @var string + */ + const DEFAULT_MODE = 'none'; + + /** + * The themes that are compatible with the default theme + * + * @var array + */ + const THEME_WHITELIST = [ + 'colorblind', + 'high-contrast', + 'Winter' + ]; + + /** + * Sequence that signals that a theme supports light mode + * + * @var string + */ + const LIGHT_MODE_IDENTIFIER = '@light-mode:'; + + /** + * Array of core LESS files Web 2 sends to the client + * + * @var string[] + */ + protected static $lessFiles = [ + '../application/fonts/fontello-ifont/css/ifont-embedded.css', + 'css/vendor/normalize.css', + 'css/icinga/base.less', + 'css/icinga/badges.less', + 'css/icinga/configmenu.less', + 'css/icinga/mixins.less', + 'css/icinga/grid.less', + 'css/icinga/nav.less', + 'css/icinga/main.less', + 'css/icinga/animation.less', + 'css/icinga/layout.less', + 'css/icinga/layout-structure.less', + 'css/icinga/menu.less', + 'css/icinga/tabs.less', + 'css/icinga/forms.less', + 'css/icinga/setup.less', + 'css/icinga/widgets.less', + 'css/icinga/login.less', + 'css/icinga/about.less', + 'css/icinga/controls.less', + 'css/icinga/dev.less', + 'css/icinga/spinner.less', + 'css/icinga/compat.less', + 'css/icinga/print.less', + 'css/icinga/responsive.less', + 'css/icinga/modal.less', + 'css/icinga/audit.less', + 'css/icinga/health.less', + 'css/icinga/php-diff.less', + 'css/icinga/pending-migration.less', + ]; + + /** + * Application instance + * + * @var \Icinga\Application\EmbeddedWeb + */ + protected $app; + + /** @var string[] Pre-compiled CSS files */ + protected $cssFiles = []; + + /** + * Less compiler + * + * @var LessCompiler + */ + protected $lessCompiler; + + /** + * Path to the public directory + * + * @var string + */ + protected $pubPath; + + /** + * Create the StyleSheet + */ + public function __construct() + { + $app = Icinga::app(); + $this->app = $app; + $this->lessCompiler = new LessCompiler(); + $this->pubPath = $app->getBaseDir('public'); + $this->collect(); + } + + /** + * Collect Web 2 and module LESS files and add them to the LESS compiler + */ + protected function collect() + { + foreach ($this->app->getLibraries() as $library) { + foreach ($library->getCssAssets() as $lessFile) { + if (substr($lessFile, -4) === '.css') { + $this->cssFiles[] = $lessFile; + } else { + $this->lessCompiler->addLessFile($lessFile); + } + } + } + + foreach (self::$lessFiles as $lessFile) { + $this->lessCompiler->addLessFile($this->pubPath . '/' . $lessFile); + } + + $mm = $this->app->getModuleManager(); + + foreach ($mm->getLoadedModules() as $moduleName => $module) { + if ($module->hasCss()) { + foreach ($module->getCssFiles() as $lessFilePath) { + $this->lessCompiler->addModuleLessFile($moduleName, $lessFilePath); + } + } + } + + $themingConfig = $this->app->getConfig()->getSection('themes'); + $defaultTheme = $themingConfig->get('default'); + $theme = null; + if ($defaultTheme !== null && $defaultTheme !== self::DEFAULT_THEME) { + $theme = $defaultTheme; + } + + if (! (bool) $themingConfig->get('disabled', false)) { + $auth = Auth::getInstance(); + if ($auth->isAuthenticated()) { + $userTheme = $auth->getUser()->getPreferences()->getValue('icingaweb', 'theme'); + if ($userTheme !== null) { + $theme = $userTheme; + } + } + } + + if ($themePath = self::getThemeFile($theme)) { + if ($this->app->isCli() || is_file($themePath) && is_readable($themePath)) { + $this->lessCompiler->setTheme($themePath); + } else { + $themePath = null; + Logger::warning(sprintf( + 'Theme "%s" set by user "%s" has not been found.', + $theme, + ($user = Auth::getInstance()->getUser()) !== null ? $user->getUsername() : 'anonymous' + )); + } + } + + if (! $themePath || in_array($theme, self::THEME_WHITELIST, true)) { + $this->lessCompiler->addLessFile($this->pubPath . '/css/icinga/login-orbs.less'); + } + + $mode = 'none'; + if ($user = Auth::getInstance()->getUser()) { + $file = $themePath !== null ? @file_get_contents($themePath) : false; + if (! $file || strpos($file, self::LIGHT_MODE_IDENTIFIER) !== false) { + $mode = $user->getPreferences()->getValue('icingaweb', 'theme_mode', self::DEFAULT_MODE); + } + } + + $this->lessCompiler->setThemeMode($this->pubPath . '/css/modes/'. $mode . '.less'); + } + + /** + * Get all collected files + * + * @return string[] + */ + protected function getFiles(): array + { + return array_merge($this->cssFiles, $this->lessCompiler->getLessFiles()); + } + + /** + * Get the stylesheet for PDF export + * + * @return $this + */ + public static function forPdf() + { + $styleSheet = new self(); + $styleSheet->lessCompiler->setTheme(null); + $styleSheet->lessCompiler->setThemeMode($styleSheet->pubPath . '/css/modes/none.less'); + $styleSheet->lessCompiler->addLessFile($styleSheet->pubPath . '/css/pdf/pdfprint.less'); + // TODO(el): Caching + return $styleSheet; + } + + /** + * Render the stylesheet + * + * @param bool $minified Whether to compress the stylesheet + * + * @return string CSS + */ + public function render($minified = false) + { + if ($minified) { + $this->lessCompiler->compress(); + } + + $css = ''; + foreach ($this->cssFiles as $cssFile) { + $css .= file_get_contents($cssFile); + } + + return $css . $this->lessCompiler->render(); + } + + /** + * Send the stylesheet to the client + * + * Does not cache the stylesheet if the HTTP header Cache-Control or Pragma is set to no-cache. + * + * @param bool $minified Whether to compress the stylesheet + */ + public static function send($minified = false) + { + $styleSheet = new self(); + + $request = $styleSheet->app->getRequest(); + $response = $styleSheet->app->getResponse(); + $response->setHeader('Cache-Control', 'private,no-cache,must-revalidate', true); + + $noCache = $request->getHeader('Cache-Control') === 'no-cache' || $request->getHeader('Pragma') === 'no-cache'; + + $collectedFiles = $styleSheet->getFiles(); + if (! $noCache && FileCache::etagMatchesFiles($collectedFiles)) { + $response + ->setHttpResponseCode(304) + ->sendHeaders(); + return; + } + + $etag = FileCache::etagForFiles($collectedFiles); + + $response->setHeader('ETag', $etag, true) + ->setHeader('Content-Type', 'text/css', true); + + $cacheFile = 'icinga-' . $etag . ($minified ? '.min' : '') . '.css'; + $cache = FileCache::instance(); + + if (! $noCache && $cache->has($cacheFile)) { + $response->setBody($cache->get($cacheFile)); + } else { + $css = $styleSheet->render($minified); + $response->setBody($css); + $cache->store($cacheFile, $css); + } + + $response->sendResponse(); + } + + /** + * Render the stylesheet + * + * @return string + */ + public function __toString() + { + try { + return $this->render(); + } catch (Exception $e) { + Logger::error($e); + return IcingaException::describe($e); + } + } + + /** + * Get the path to the current LESS theme file + * + * @param $theme + * + * @return string|null Return null if self::DEFAULT_THEME is set as theme, path otherwise + */ + public static function getThemeFile($theme) + { + $app = Icinga::app(); + + if ($theme && $theme !== self::DEFAULT_THEME) { + if (Hook::has('ThemeLoader')) { + try { + $path = Hook::first('ThemeLoader')->getThemeFile($theme); + } catch (Exception $e) { + Logger::error('Failed to call ThemeLoader hook: %s', $e); + $path = null; + } + + if ($path !== null) { + return $path; + } + } + + if (($pos = strpos($theme, '/')) !== false) { + $moduleName = substr($theme, 0, $pos); + $theme = substr($theme, $pos + 1); + if ($app->getModuleManager()->hasLoaded($moduleName)) { + $module = $app->getModuleManager()->getModule($moduleName); + + return $module->getCssDir() . '/themes/' . $theme . '.less'; + } + } else { + return $app->getBaseDir('public') . '/css/themes/' . $theme . '.less'; + } + } + + return null; + } +} |