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-rw-r--r--inc/3rdparty/htmlpurifier/HTMLPurifier/Arborize.php71
1 files changed, 71 insertions, 0 deletions
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/Arborize.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/Arborize.php
new file mode 100644
index 00000000..eab66566
--- /dev/null
+++ b/inc/3rdparty/htmlpurifier/HTMLPurifier/Arborize.php
@@ -0,0 +1,71 @@
1<?php
2
3/**
4 * Converts a stream of HTMLPurifier_Token into an HTMLPurifier_Node,
5 * and back again.
6 *
7 * @note This transformation is not an equivalence. We mutate the input
8 * token stream to make it so; see all [MUT] markers in code.
9 */
10class HTMLPurifier_Arborize
11{
12 public static function arborize($tokens, $config, $context) {
13 $definition = $config->getHTMLDefinition();
14 $parent = new HTMLPurifier_Token_Start($definition->info_parent);
15 $stack = array($parent->toNode());
16 foreach ($tokens as $token) {
17 $token->skip = null; // [MUT]
18 $token->carryover = null; // [MUT]
19 if ($token instanceof HTMLPurifier_Token_End) {
20 $token->start = null; // [MUT]
21 $r = array_pop($stack);
22 assert($r->name === $token->name);
23 assert(empty($token->attr));
24 $r->endCol = $token->col;
25 $r->endLine = $token->line;
26 $r->endArmor = $token->armor;
27 continue;
28 }
29 $node = $token->toNode();
30 $stack[count($stack)-1]->children[] = $node;
31 if ($token instanceof HTMLPurifier_Token_Start) {
32 $stack[] = $node;
33 }
34 }
35 assert(count($stack) == 1);
36 return $stack[0];
37 }
38
39 public static function flatten($node, $config, $context) {
40 $level = 0;
41 $nodes = array($level => new HTMLPurifier_Queue(array($node)));
42 $closingTokens = array();
43 $tokens = array();
44 do {
45 while (!$nodes[$level]->isEmpty()) {
46 $node = $nodes[$level]->shift(); // FIFO
47 list($start, $end) = $node->toTokenPair();
48 if ($level > 0) {
49 $tokens[] = $start;
50 }
51 if ($end !== NULL) {
52 $closingTokens[$level][] = $end;
53 }
54 if ($node instanceof HTMLPurifier_Node_Element) {
55 $level++;
56 $nodes[$level] = new HTMLPurifier_Queue();
57 foreach ($node->children as $childNode) {
58 $nodes[$level]->push($childNode);
59 }
60 }
61 }
62 $level--;
63 if ($level && isset($closingTokens[$level])) {
64 while ($token = array_pop($closingTokens[$level])) {
65 $tokens[] = $token;
66 }
67 }
68 } while ($level > 0);
69 return $tokens;
70 }
71}