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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/Lines.php | |
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Diffstat (limited to 'admin/survey/minify/lib/Minify/Lines.php')
| -rw-r--r-- | admin/survey/minify/lib/Minify/Lines.php | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/admin/survey/minify/lib/Minify/Lines.php b/admin/survey/minify/lib/Minify/Lines.php new file mode 100644 index 0000000..60bf3b4 --- /dev/null +++ b/admin/survey/minify/lib/Minify/Lines.php @@ -0,0 +1,209 @@ +<?php
+/**
+ * Class Minify_Lines
+ * @package Minify
+ */
+
+/**
+ * Add line numbers in C-style comments for easier debugging of combined content
+ *
+ * @package Minify
+ * @author Stephen Clay <steve@mrclay.org>
+ * @author Adam Pedersen (Issue 55 fix)
+ */
+class Minify_Lines
+{
+
+ /**
+ * Add line numbers in C-style comments
+ *
+ * This uses a very basic parser easily fooled by comment tokens inside
+ * strings or regexes, but, otherwise, generally clean code will not be
+ * mangled. URI rewriting can also be performed.
+ *
+ * @param string $content
+ *
+ * @param array $options available options:
+ *
+ * 'id': (optional) string to identify file. E.g. file name/path
+ *
+ * 'currentDir': (default null) if given, this is assumed to be the
+ * directory of the current CSS file. Using this, minify will rewrite
+ * all relative URIs in import/url declarations to correctly point to
+ * the desired files, and prepend a comment with debugging information about
+ * this process.
+ *
+ * @return string
+ */
+ public static function minify($content, $options = array())
+ {
+ $id = (isset($options['id']) && $options['id']) ? $options['id'] : '';
+ $content = str_replace("\r\n", "\n", $content);
+
+ $lines = explode("\n", $content);
+ $numLines = count($lines);
+ // determine left padding
+ $padTo = strlen((string) $numLines); // e.g. 103 lines = 3 digits
+ $inComment = false;
+ $i = 0;
+ $newLines = array();
+
+ while (null !== ($line = array_shift($lines))) {
+ if (('' !== $id) && (0 === $i % 50)) {
+ if ($inComment) {
+ array_push($newLines, '', "/* {$id} *|", '');
+ } else {
+ array_push($newLines, '', "/* {$id} */", '');
+ }
+ }
+
+ ++$i;
+ $newLines[] = self::_addNote($line, $i, $inComment, $padTo);
+ $inComment = self::_eolInComment($line, $inComment);
+ }
+
+ $content = implode("\n", $newLines) . "\n";
+
+ // check for desired URI rewriting
+ if (isset($options['currentDir'])) {
+ Minify_CSS_UriRewriter::$debugText = '';
+ $docRoot = isset($options['docRoot']) ? $options['docRoot'] : $_SERVER['DOCUMENT_ROOT'];
+ $symlinks = isset($options['symlinks']) ? $options['symlinks'] : array();
+
+ $content = Minify_CSS_UriRewriter::rewrite($content, $options['currentDir'], $docRoot, $symlinks);
+
+ $content = "/* Minify_CSS_UriRewriter::\$debugText\n\n"
+ . Minify_CSS_UriRewriter::$debugText . "*/\n"
+ . $content;
+ }
+
+ return $content;
+ }
+
+ /**
+ * Is the parser within a C-style comment at the end of this line?
+ *
+ * @param string $line current line of code
+ *
+ * @param bool $inComment was the parser in a C-style comment at the
+ * beginning of the previous line?
+ *
+ * @return bool
+ */
+ private static function _eolInComment($line, $inComment)
+ {
+ while (strlen($line)) {
+ if ($inComment) {
+ // only "*/" can end the comment
+ $index = self::_find($line, '*/');
+ if ($index === false) {
+ return true;
+ }
+
+ // stop comment and keep walking line
+ $inComment = false;
+ @$line = (string)substr($line, $index + 2);
+ continue;
+ }
+
+ // look for "//" and "/*"
+ $single = self::_find($line, '//');
+ $multi = self::_find($line, '/*');
+ if ($multi === false) {
+ return false;
+ }
+
+ if ($single === false || $multi < $single) {
+ // start comment and keep walking line
+ $inComment = true;
+ @$line = (string)substr($line, $multi + 2);
+ continue;
+ }
+
+ // a single-line comment preceeded it
+ return false;
+ }
+
+ return $inComment;
+ }
+
+ /**
+ * Prepend a comment (or note) to the given line
+ *
+ * @param string $line current line of code
+ *
+ * @param string $note content of note/comment
+ *
+ * @param bool $inComment was the parser in a comment at the
+ * beginning of the line?
+ *
+ * @param int $padTo minimum width of comment
+ *
+ * @return string
+ */
+ private static function _addNote($line, $note, $inComment, $padTo)
+ {
+ if ($inComment) {
+ $line = '/* ' . str_pad($note, $padTo, ' ', STR_PAD_RIGHT) . ' *| ' . $line;
+ } else {
+ $line = '/* ' . str_pad($note, $padTo, ' ', STR_PAD_RIGHT) . ' */ ' . $line;
+ }
+
+ return rtrim($line);
+ }
+
+ /**
+ * Find a token trying to avoid false positives
+ *
+ * @param string $str String containing the token
+ * @param string $token Token being checked
+ * @return bool
+ */
+ private static function _find($str, $token)
+ {
+ switch ($token) {
+ case '//':
+ $fakes = array(
+ '://' => 1,
+ '"//' => 1,
+ '\'//' => 1,
+ '".//' => 2,
+ '\'.//' => 2,
+ );
+ break;
+ case '/*':
+ $fakes = array(
+ '"/*' => 1,
+ '\'/*' => 1,
+ '"//*' => 2,
+ '\'//*' => 2,
+ '".//*' => 3,
+ '\'.//*' => 3,
+ '*/*' => 1,
+ '\\/*' => 1,
+ );
+ break;
+ default:
+ $fakes = array();
+ }
+
+ $index = strpos($str, $token);
+ $offset = 0;
+
+ while ($index !== false) {
+ foreach ($fakes as $fake => $skip) {
+ $check = substr($str, $index - $skip, strlen($fake));
+ if ($check === $fake) {
+ // move offset and scan again
+ $offset += $index + strlen($token);
+ $index = strpos($str, $token, $offset);
+ break;
+ }
+ }
+ // legitimate find
+ return $index;
+ }
+
+ return $index;
+ }
+}
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