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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/CommentPreserver.php | |
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Diffstat (limited to 'admin/survey/minify/lib/Minify/CommentPreserver.php')
| -rw-r--r-- | admin/survey/minify/lib/Minify/CommentPreserver.php | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/admin/survey/minify/lib/Minify/CommentPreserver.php b/admin/survey/minify/lib/Minify/CommentPreserver.php new file mode 100644 index 0000000..2e6599d --- /dev/null +++ b/admin/survey/minify/lib/Minify/CommentPreserver.php @@ -0,0 +1,87 @@ +<?php
+/**
+ * Class Minify_CommentPreserver
+ * @package Minify
+ */
+
+/**
+ * Process a string in pieces preserving C-style comments that begin with "/*!"
+ *
+ * @package Minify
+ * @author Stephen Clay <steve@mrclay.org>
+ */
+class Minify_CommentPreserver
+{
+
+ /**
+ * String to be prepended to each preserved comment
+ *
+ * @var string
+ */
+ public static $prepend = "\n";
+
+ /**
+ * String to be appended to each preserved comment
+ *
+ * @var string
+ */
+ public static $append = "\n";
+
+ /**
+ * Process a string outside of C-style comments that begin with "/*!"
+ *
+ * On each non-empty string outside these comments, the given processor
+ * function will be called. The comments will be surrounded by
+ * Minify_CommentPreserver::$preprend and Minify_CommentPreserver::$append.
+ *
+ * @param string $content
+ * @param callback $processor function
+ * @param array $args array of extra arguments to pass to the processor
+ * function (default = array())
+ * @return string
+ */
+ public static function process($content, $processor, $args = array())
+ {
+ $ret = '';
+ while (true) {
+ list($beforeComment, $comment, $afterComment) = self::_nextComment($content);
+ if ('' !== $beforeComment) {
+ $callArgs = $args;
+ array_unshift($callArgs, $beforeComment);
+ $ret .= call_user_func_array($processor, $callArgs);
+ }
+ if (false === $comment) {
+ break;
+ }
+ $ret .= $comment;
+ $content = $afterComment;
+ }
+
+ return $ret;
+ }
+
+ /**
+ * Extract comments that YUI Compressor preserves.
+ *
+ * @param string $in input
+ *
+ * @return array 3 elements are returned. If a YUI comment is found, the
+ * 2nd element is the comment and the 1st and 3rd are the surrounding
+ * strings. If no comment is found, the entire string is returned as the
+ * 1st element and the other two are false.
+ */
+ private static function _nextComment($in)
+ {
+ if (false === ($start = strpos($in, '/*!')) || false === ($end = strpos($in, '*/', $start + 3))) {
+ return array($in, false, false);
+ }
+
+ $beforeComment = substr($in, 0, $start);
+ $comment = self::$prepend . '/*!' . substr($in, $start + 3, $end - $start - 1) . self::$append;
+
+ $endChars = (strlen($in) - $end - 2);
+ $afterComment = (0 === $endChars) ? '' : substr($in, -$endChars);
+
+ return array($beforeComment, $comment, $afterComment);
+ }
+}
|