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| author | Anton Luka Šijanec <anton@sijanec.eu> | 2022-01-11 12:35:47 +0100 |
|---|---|---|
| committer | Anton Luka Šijanec <anton@sijanec.eu> | 2022-01-11 12:35:47 +0100 |
| commit | 19985dbb8c0aa66dc4bf7905abc1148de909097d (patch) | |
| tree | 2cd5a5d20d7e80fc2a51adf60d838d8a2c40999e /admin/survey/minify/lib/Minify/LessCssSource.php | |
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Diffstat (limited to 'admin/survey/minify/lib/Minify/LessCssSource.php')
| -rw-r--r-- | admin/survey/minify/lib/Minify/LessCssSource.php | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/admin/survey/minify/lib/Minify/LessCssSource.php b/admin/survey/minify/lib/Minify/LessCssSource.php new file mode 100644 index 0000000..389932c --- /dev/null +++ b/admin/survey/minify/lib/Minify/LessCssSource.php @@ -0,0 +1,128 @@ +<?php
+
+class Minify_LessCssSource extends Minify_Source
+{
+ /**
+ * @var Minify_CacheInterface
+ */
+ private $cache;
+
+ /**
+ * Parsed lessphp cache object
+ *
+ * @var array
+ */
+ private $parsed;
+
+ /**
+ * @inheritdoc
+ */
+ public function __construct(array $spec, Minify_CacheInterface $cache)
+ {
+ parent::__construct($spec);
+
+ $this->cache = $cache;
+ }
+
+ /**
+ * Get last modified of all parsed files
+ *
+ * @return int
+ */
+ public function getLastModified()
+ {
+ $cache = $this->getCache();
+
+ return $cache['lastModified'];
+ }
+
+ /**
+ * Get content
+ *
+ * @return string
+ */
+ public function getContent()
+ {
+ $cache = $this->getCache();
+
+ return $cache['compiled'];
+ }
+
+ /**
+ * Get lessphp cache object
+ *
+ * @return array
+ */
+ private function getCache()
+ {
+ // cache for single run
+ // so that getLastModified and getContent in single request do not add additional cache roundtrips (i.e memcache)
+ if (isset($this->parsed)) {
+ return $this->parsed;
+ }
+
+ // check from cache first
+ $cache = null;
+ $cacheId = $this->getCacheId();
+ if ($this->cache->isValid($cacheId, 0)) {
+ if ($cache = $this->cache->fetch($cacheId)) {
+ $cache = unserialize($cache);
+ }
+ }
+
+ $less = $this->getCompiler();
+ $input = $cache ? $cache : $this->filepath;
+ $cache = $less->cachedCompile($input);
+
+ if (!is_array($input) || $cache['updated'] > $input['updated']) {
+ $cache['lastModified'] = $this->getMaxLastModified($cache);
+ $this->cache->store($cacheId, serialize($cache));
+ }
+
+ return $this->parsed = $cache;
+ }
+
+ /**
+ * Calculate maximum last modified of all files,
+ * as the 'updated' timestamp in cache is not the same as file last modified timestamp:
+ * @link https://github.com/leafo/lessphp/blob/v0.4.0/lessc.inc.php#L1904
+ * @return int
+ */
+ private function getMaxLastModified($cache)
+ {
+ $lastModified = 0;
+ foreach ($cache['files'] as $mtime) {
+ $lastModified = max($lastModified, $mtime);
+ }
+
+ return $lastModified;
+ }
+
+ /**
+ * Make a unique cache id for for this source.
+ *
+ * @param string $prefix
+ *
+ * @return string
+ */
+ private function getCacheId($prefix = 'minify')
+ {
+ $md5 = md5($this->filepath);
+
+ return "{$prefix}_less2_{$md5}";
+ }
+
+ /**
+ * Get instance of less compiler
+ *
+ * @return lessc
+ */
+ private function getCompiler()
+ {
+ $less = new lessc();
+ // do not spend CPU time letting less doing minify
+ $less->setPreserveComments(true);
+
+ return $less;
+ }
+}
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