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-rw-r--r--vendor/ezyang/htmlpurifier/library/HTMLPurifier/Arborize.php71
1 files changed, 71 insertions, 0 deletions
diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/Arborize.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/Arborize.php
new file mode 100644
index 0000000..d2e9d22
--- /dev/null
+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/Arborize.php
@@ -0,0 +1,71 @@
+<?php
+
+/**
+ * Converts a stream of HTMLPurifier_Token into an HTMLPurifier_Node,
+ * and back again.
+ *
+ * @note This transformation is not an equivalence. We mutate the input
+ * token stream to make it so; see all [MUT] markers in code.
+ */
+class HTMLPurifier_Arborize
+{
+ public static function arborize($tokens, $config, $context) {
+ $definition = $config->getHTMLDefinition();
+ $parent = new HTMLPurifier_Token_Start($definition->info_parent);
+ $stack = array($parent->toNode());
+ foreach ($tokens as $token) {
+ $token->skip = null; // [MUT]
+ $token->carryover = null; // [MUT]
+ if ($token instanceof HTMLPurifier_Token_End) {
+ $token->start = null; // [MUT]
+ $r = array_pop($stack);
+ //assert($r->name === $token->name);
+ //assert(empty($token->attr));
+ $r->endCol = $token->col;
+ $r->endLine = $token->line;
+ $r->endArmor = $token->armor;
+ continue;
+ }
+ $node = $token->toNode();
+ $stack[count($stack)-1]->children[] = $node;
+ if ($token instanceof HTMLPurifier_Token_Start) {
+ $stack[] = $node;
+ }
+ }
+ //assert(count($stack) == 1);
+ return $stack[0];
+ }
+
+ public static function flatten($node, $config, $context) {
+ $level = 0;
+ $nodes = array($level => new HTMLPurifier_Queue(array($node)));
+ $closingTokens = array();
+ $tokens = array();
+ do {
+ while (!$nodes[$level]->isEmpty()) {
+ $node = $nodes[$level]->shift(); // FIFO
+ list($start, $end) = $node->toTokenPair();
+ if ($level > 0) {
+ $tokens[] = $start;
+ }
+ if ($end !== NULL) {
+ $closingTokens[$level][] = $end;
+ }
+ if ($node instanceof HTMLPurifier_Node_Element) {
+ $level++;
+ $nodes[$level] = new HTMLPurifier_Queue();
+ foreach ($node->children as $childNode) {
+ $nodes[$level]->push($childNode);
+ }
+ }
+ }
+ $level--;
+ if ($level && isset($closingTokens[$level])) {
+ while ($token = array_pop($closingTokens[$level])) {
+ $tokens[] = $token;
+ }
+ }
+ } while ($level > 0);
+ return $tokens;
+ }
+}