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authorKlaus <Klaus.Weidenbach@gmx.net>2017-03-27 21:39:02 +0200
committerGitHub <noreply@github.com>2017-03-27 21:39:02 +0200
commit6375401e0af6c52d151dd2b944aa6a054b8ddc05 (patch)
tree982ab84421ffa8ee2c48f38cc2d1eef11853dbf6 /vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef.php
parentb6b62506c5f4ed5bc354d548702538bda36aff36 (diff)
parentf718e2b0db0fe3477212a8dd6c3ec067f4432862 (diff)
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Merge pull request #701 from dawnbreak/HTMLpurifier
HTMLPurifier library update
Diffstat (limited to 'vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef.php')
-rw-r--r--vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef.php144
1 files changed, 144 insertions, 0 deletions
diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef.php
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+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef.php
@@ -0,0 +1,144 @@
+<?php
+
+/**
+ * Base class for all validating attribute definitions.
+ *
+ * This family of classes forms the core for not only HTML attribute validation,
+ * but also any sort of string that needs to be validated or cleaned (which
+ * means CSS properties and composite definitions are defined here too).
+ * Besides defining (through code) what precisely makes the string valid,
+ * subclasses are also responsible for cleaning the code if possible.
+ */
+
+abstract class HTMLPurifier_AttrDef
+{
+
+ /**
+ * Tells us whether or not an HTML attribute is minimized.
+ * Has no meaning in other contexts.
+ * @type bool
+ */
+ public $minimized = false;
+
+ /**
+ * Tells us whether or not an HTML attribute is required.
+ * Has no meaning in other contexts
+ * @type bool
+ */
+ public $required = false;
+
+ /**
+ * Validates and cleans passed string according to a definition.
+ *
+ * @param string $string String to be validated and cleaned.
+ * @param HTMLPurifier_Config $config Mandatory HTMLPurifier_Config object.
+ * @param HTMLPurifier_Context $context Mandatory HTMLPurifier_Context object.
+ */
+ abstract public function validate($string, $config, $context);
+
+ /**
+ * Convenience method that parses a string as if it were CDATA.
+ *
+ * This method process a string in the manner specified at
+ * <http://www.w3.org/TR/html4/types.html#h-6.2> by removing
+ * leading and trailing whitespace, ignoring line feeds, and replacing
+ * carriage returns and tabs with spaces. While most useful for HTML
+ * attributes specified as CDATA, it can also be applied to most CSS
+ * values.
+ *
+ * @note This method is not entirely standards compliant, as trim() removes
+ * more types of whitespace than specified in the spec. In practice,
+ * this is rarely a problem, as those extra characters usually have
+ * already been removed by HTMLPurifier_Encoder.
+ *
+ * @warning This processing is inconsistent with XML's whitespace handling
+ * as specified by section 3.3.3 and referenced XHTML 1.0 section
+ * 4.7. However, note that we are NOT necessarily
+ * parsing XML, thus, this behavior may still be correct. We
+ * assume that newlines have been normalized.
+ */
+ public function parseCDATA($string)
+ {
+ $string = trim($string);
+ $string = str_replace(array("\n", "\t", "\r"), ' ', $string);
+ return $string;
+ }
+
+ /**
+ * Factory method for creating this class from a string.
+ * @param string $string String construction info
+ * @return HTMLPurifier_AttrDef Created AttrDef object corresponding to $string
+ */
+ public function make($string)
+ {
+ // default implementation, return a flyweight of this object.
+ // If $string has an effect on the returned object (i.e. you
+ // need to overload this method), it is best
+ // to clone or instantiate new copies. (Instantiation is safer.)
+ return $this;
+ }
+
+ /**
+ * Removes spaces from rgb(0, 0, 0) so that shorthand CSS properties work
+ * properly. THIS IS A HACK!
+ * @param string $string a CSS colour definition
+ * @return string
+ */
+ protected function mungeRgb($string)
+ {
+ $p = '\s*(\d+(\.\d+)?([%]?))\s*';
+
+ if (preg_match('/(rgba|hsla)\(/', $string)) {
+ return preg_replace('/(rgba|hsla)\('.$p.','.$p.','.$p.','.$p.'\)/', '\1(\2,\5,\8,\11)', $string);
+ }
+
+ return preg_replace('/(rgb|hsl)\('.$p.','.$p.','.$p.'\)/', '\1(\2,\5,\8)', $string);
+ }
+
+ /**
+ * Parses a possibly escaped CSS string and returns the "pure"
+ * version of it.
+ */
+ protected function expandCSSEscape($string)
+ {
+ // flexibly parse it
+ $ret = '';
+ for ($i = 0, $c = strlen($string); $i < $c; $i++) {
+ if ($string[$i] === '\\') {
+ $i++;
+ if ($i >= $c) {
+ $ret .= '\\';
+ break;
+ }
+ if (ctype_xdigit($string[$i])) {
+ $code = $string[$i];
+ for ($a = 1, $i++; $i < $c && $a < 6; $i++, $a++) {
+ if (!ctype_xdigit($string[$i])) {
+ break;
+ }
+ $code .= $string[$i];
+ }
+ // We have to be extremely careful when adding
+ // new characters, to make sure we're not breaking
+ // the encoding.
+ $char = HTMLPurifier_Encoder::unichr(hexdec($code));
+ if (HTMLPurifier_Encoder::cleanUTF8($char) === '') {
+ continue;
+ }
+ $ret .= $char;
+ if ($i < $c && trim($string[$i]) !== '') {
+ $i--;
+ }
+ continue;
+ }
+ if ($string[$i] === "\n") {
+ continue;
+ }
+ }
+ $ret .= $string[$i];
+ }
+ return $ret;
+ }
+}
+
+// vim: et sw=4 sts=4