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authorNicolas Lœuillet <nicolas@loeuillet.org>2014-02-21 15:57:10 +0100
committerNicolas Lœuillet <nicolas@loeuillet.org>2014-02-21 15:57:10 +0100
commit99679d06884120c57f43b44e55e03595f1f87bed (patch)
treea3f2a1aa1afdaeca1386d0c6e8a75344fd2241fb /inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy
parent655214ab30ee84884dc408488b85586f36263fcb (diff)
parentd3b47e94705e17b3ba3529cbb1dc6efe69c5d2b7 (diff)
downloadwallabag-1.5.2.tar.gz
wallabag-1.5.2.tar.zst
wallabag-1.5.2.zip
Merge pull request #481 from wallabag/dev1.5.2
1.5.2
Diffstat (limited to 'inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy')
-rw-r--r--inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/Composite.php30
-rw-r--r--inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/Core.php17
-rw-r--r--inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/FixNesting.php181
-rw-r--r--inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/MakeWellFormed.php600
-rw-r--r--inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/RemoveForeignElements.php207
-rw-r--r--inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/ValidateAttributes.php45
6 files changed, 1080 insertions, 0 deletions
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/Composite.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/Composite.php
new file mode 100644
index 00000000..9de812df
--- /dev/null
+++ b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/Composite.php
@@ -0,0 +1,30 @@
1<?php
2
3/**
4 * Composite strategy that runs multiple strategies on tokens.
5 */
6abstract class HTMLPurifier_Strategy_Composite extends HTMLPurifier_Strategy
7{
8
9 /**
10 * List of strategies to run tokens through.
11 * @type HTMLPurifier_Strategy[]
12 */
13 protected $strategies = array();
14
15 /**
16 * @param HTMLPurifier_Token[] $tokens
17 * @param HTMLPurifier_Config $config
18 * @param HTMLPurifier_Context $context
19 * @return HTMLPurifier_Token[]
20 */
21 public function execute($tokens, $config, $context)
22 {
23 foreach ($this->strategies as $strategy) {
24 $tokens = $strategy->execute($tokens, $config, $context);
25 }
26 return $tokens;
27 }
28}
29
30// vim: et sw=4 sts=4
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/Core.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/Core.php
new file mode 100644
index 00000000..07752152
--- /dev/null
+++ b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/Core.php
@@ -0,0 +1,17 @@
1<?php
2
3/**
4 * Core strategy composed of the big four strategies.
5 */
6class HTMLPurifier_Strategy_Core extends HTMLPurifier_Strategy_Composite
7{
8 public function __construct()
9 {
10 $this->strategies[] = new HTMLPurifier_Strategy_RemoveForeignElements();
11 $this->strategies[] = new HTMLPurifier_Strategy_MakeWellFormed();
12 $this->strategies[] = new HTMLPurifier_Strategy_FixNesting();
13 $this->strategies[] = new HTMLPurifier_Strategy_ValidateAttributes();
14 }
15}
16
17// vim: et sw=4 sts=4
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/FixNesting.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/FixNesting.php
new file mode 100644
index 00000000..8b1eb20f
--- /dev/null
+++ b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/FixNesting.php
@@ -0,0 +1,181 @@
1<?php
2
3/**
4 * Takes a well formed list of tokens and fixes their nesting.
5 *
6 * HTML elements dictate which elements are allowed to be their children,
7 * for example, you can't have a p tag in a span tag. Other elements have
8 * much more rigorous definitions: tables, for instance, require a specific
9 * order for their elements. There are also constraints not expressible by
10 * document type definitions, such as the chameleon nature of ins/del
11 * tags and global child exclusions.
12 *
13 * The first major objective of this strategy is to iterate through all
14 * the nodes and determine whether or not their children conform to the
15 * element's definition. If they do not, the child definition may
16 * optionally supply an amended list of elements that is valid or
17 * require that the entire node be deleted (and the previous node
18 * rescanned).
19 *
20 * The second objective is to ensure that explicitly excluded elements of
21 * an element do not appear in its children. Code that accomplishes this
22 * task is pervasive through the strategy, though the two are distinct tasks
23 * and could, theoretically, be seperated (although it's not recommended).
24 *
25 * @note Whether or not unrecognized children are silently dropped or
26 * translated into text depends on the child definitions.
27 *
28 * @todo Enable nodes to be bubbled out of the structure. This is
29 * easier with our new algorithm.
30 */
31
32class HTMLPurifier_Strategy_FixNesting extends HTMLPurifier_Strategy
33{
34
35 /**
36 * @param HTMLPurifier_Token[] $tokens
37 * @param HTMLPurifier_Config $config
38 * @param HTMLPurifier_Context $context
39 * @return array|HTMLPurifier_Token[]
40 */
41 public function execute($tokens, $config, $context)
42 {
43
44 //####################################################################//
45 // Pre-processing
46
47 // O(n) pass to convert to a tree, so that we can efficiently
48 // refer to substrings
49 $top_node = HTMLPurifier_Arborize::arborize($tokens, $config, $context);
50
51 // get a copy of the HTML definition
52 $definition = $config->getHTMLDefinition();
53
54 $excludes_enabled = !$config->get('Core.DisableExcludes');
55
56 // setup the context variable 'IsInline', for chameleon processing
57 // is 'false' when we are not inline, 'true' when it must always
58 // be inline, and an integer when it is inline for a certain
59 // branch of the document tree
60 $is_inline = $definition->info_parent_def->descendants_are_inline;
61 $context->register('IsInline', $is_inline);
62
63 // setup error collector
64 $e =& $context->get('ErrorCollector', true);
65
66 //####################################################################//
67 // Loop initialization
68
69 // stack that contains all elements that are excluded
70 // it is organized by parent elements, similar to $stack,
71 // but it is only populated when an element with exclusions is
72 // processed, i.e. there won't be empty exclusions.
73 $exclude_stack = array($definition->info_parent_def->excludes);
74
75 // variable that contains the start token while we are processing
76 // nodes. This enables error reporting to do its job
77 $node = $top_node;
78 // dummy token
79 list($token, $d) = $node->toTokenPair();
80 $context->register('CurrentNode', $node);
81 $context->register('CurrentToken', $token);
82
83 //####################################################################//
84 // Loop
85
86 // We need to implement a post-order traversal iteratively, to
87 // avoid running into stack space limits. This is pretty tricky
88 // to reason about, so we just manually stack-ify the recursive
89 // variant:
90 //
91 // function f($node) {
92 // foreach ($node->children as $child) {
93 // f($child);
94 // }
95 // validate($node);
96 // }
97 //
98 // Thus, we will represent a stack frame as array($node,
99 // $is_inline, stack of children)
100 // e.g. array_reverse($node->children) - already processed
101 // children.
102
103 $parent_def = $definition->info_parent_def;
104 $stack = array(
105 array($top_node,
106 $parent_def->descendants_are_inline,
107 $parent_def->excludes, // exclusions
108 0)
109 );
110
111 while (!empty($stack)) {
112 list($node, $is_inline, $excludes, $ix) = array_pop($stack);
113 // recursive call
114 $go = false;
115 $def = empty($stack) ? $definition->info_parent_def : $definition->info[$node->name];
116 while (isset($node->children[$ix])) {
117 $child = $node->children[$ix++];
118 if ($child instanceof HTMLPurifier_Node_Element) {
119 $go = true;
120 $stack[] = array($node, $is_inline, $excludes, $ix);
121 $stack[] = array($child,
122 // ToDo: I don't think it matters if it's def or
123 // child_def, but double check this...
124 $is_inline || $def->descendants_are_inline,
125 empty($def->excludes) ? $excludes
126 : array_merge($excludes, $def->excludes),
127 0);
128 break;
129 }
130 };
131 if ($go) continue;
132 list($token, $d) = $node->toTokenPair();
133 // base case
134 if ($excludes_enabled && isset($excludes[$node->name])) {
135 $node->dead = true;
136 if ($e) $e->send(E_ERROR, 'Strategy_FixNesting: Node excluded');
137 } else {
138 // XXX I suppose it would be slightly more efficient to
139 // avoid the allocation here and have children
140 // strategies handle it
141 $children = array();
142 foreach ($node->children as $child) {
143 if (!$child->dead) $children[] = $child;
144 }
145 $result = $def->child->validateChildren($children, $config, $context);
146 if ($result === true) {
147 // nop
148 $node->children = $children;
149 } elseif ($result === false) {
150 $node->dead = true;
151 if ($e) $e->send(E_ERROR, 'Strategy_FixNesting: Node removed');
152 } else {
153 $node->children = $result;
154 if ($e) {
155 // XXX This will miss mutations of internal nodes. Perhaps defer to the child validators
156 if (empty($result) && !empty($children)) {
157 $e->send(E_ERROR, 'Strategy_FixNesting: Node contents removed');
158 } else if ($result != $children) {
159 $e->send(E_WARNING, 'Strategy_FixNesting: Node reorganized');
160 }
161 }
162 }
163 }
164 }
165
166 //####################################################################//
167 // Post-processing
168
169 // remove context variables
170 $context->destroy('IsInline');
171 $context->destroy('CurrentNode');
172 $context->destroy('CurrentToken');
173
174 //####################################################################//
175 // Return
176
177 return HTMLPurifier_Arborize::flatten($node, $config, $context);
178 }
179}
180
181// vim: et sw=4 sts=4
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/MakeWellFormed.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/MakeWellFormed.php
new file mode 100644
index 00000000..2c792feb
--- /dev/null
+++ b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/MakeWellFormed.php
@@ -0,0 +1,600 @@
1<?php
2
3/**
4 * Takes tokens makes them well-formed (balance end tags, etc.)
5 *
6 * Specification of the armor attributes this strategy uses:
7 *
8 * - MakeWellFormed_TagClosedError: This armor field is used to
9 * suppress tag closed errors for certain tokens [TagClosedSuppress],
10 * in particular, if a tag was generated automatically by HTML
11 * Purifier, we may rely on our infrastructure to close it for us
12 * and shouldn't report an error to the user [TagClosedAuto].
13 */
14class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
15{
16
17 /**
18 * Array stream of tokens being processed.
19 * @type HTMLPurifier_Token[]
20 */
21 protected $tokens;
22
23 /**
24 * Current token.
25 * @type HTMLPurifier_Token
26 */
27 protected $token;
28
29 /**
30 * Zipper managing the true state.
31 * @type HTMLPurifier_Zipper
32 */
33 protected $zipper;
34
35 /**
36 * Current nesting of elements.
37 * @type array
38 */
39 protected $stack;
40
41 /**
42 * Injectors active in this stream processing.
43 * @type HTMLPurifier_Injector[]
44 */
45 protected $injectors;
46
47 /**
48 * Current instance of HTMLPurifier_Config.
49 * @type HTMLPurifier_Config
50 */
51 protected $config;
52
53 /**
54 * Current instance of HTMLPurifier_Context.
55 * @type HTMLPurifier_Context
56 */
57 protected $context;
58
59 /**
60 * @param HTMLPurifier_Token[] $tokens
61 * @param HTMLPurifier_Config $config
62 * @param HTMLPurifier_Context $context
63 * @return HTMLPurifier_Token[]
64 * @throws HTMLPurifier_Exception
65 */
66 public function execute($tokens, $config, $context)
67 {
68 $definition = $config->getHTMLDefinition();
69
70 // local variables
71 $generator = new HTMLPurifier_Generator($config, $context);
72 $escape_invalid_tags = $config->get('Core.EscapeInvalidTags');
73 // used for autoclose early abortion
74 $global_parent_allowed_elements = $definition->info_parent_def->child->getAllowedElements($config);
75 $e = $context->get('ErrorCollector', true);
76 $i = false; // injector index
77 list($zipper, $token) = HTMLPurifier_Zipper::fromArray($tokens);
78 if ($token === NULL) {
79 return array();
80 }
81 $reprocess = false; // whether or not to reprocess the same token
82 $stack = array();
83
84 // member variables
85 $this->stack =& $stack;
86 $this->tokens =& $tokens;
87 $this->token =& $token;
88 $this->zipper =& $zipper;
89 $this->config = $config;
90 $this->context = $context;
91
92 // context variables
93 $context->register('CurrentNesting', $stack);
94 $context->register('InputZipper', $zipper);
95 $context->register('CurrentToken', $token);
96
97 // -- begin INJECTOR --
98
99 $this->injectors = array();
100
101 $injectors = $config->getBatch('AutoFormat');
102 $def_injectors = $definition->info_injector;
103 $custom_injectors = $injectors['Custom'];
104 unset($injectors['Custom']); // special case
105 foreach ($injectors as $injector => $b) {
106 // XXX: Fix with a legitimate lookup table of enabled filters
107 if (strpos($injector, '.') !== false) {
108 continue;
109 }
110 $injector = "HTMLPurifier_Injector_$injector";
111 if (!$b) {
112 continue;
113 }
114 $this->injectors[] = new $injector;
115 }
116 foreach ($def_injectors as $injector) {
117 // assumed to be objects
118 $this->injectors[] = $injector;
119 }
120 foreach ($custom_injectors as $injector) {
121 if (!$injector) {
122 continue;
123 }
124 if (is_string($injector)) {
125 $injector = "HTMLPurifier_Injector_$injector";
126 $injector = new $injector;
127 }
128 $this->injectors[] = $injector;
129 }
130
131 // give the injectors references to the definition and context
132 // variables for performance reasons
133 foreach ($this->injectors as $ix => $injector) {
134 $error = $injector->prepare($config, $context);
135 if (!$error) {
136 continue;
137 }
138 array_splice($this->injectors, $ix, 1); // rm the injector
139 trigger_error("Cannot enable {$injector->name} injector because $error is not allowed", E_USER_WARNING);
140 }
141
142 // -- end INJECTOR --
143
144 // a note on reprocessing:
145 // In order to reduce code duplication, whenever some code needs
146 // to make HTML changes in order to make things "correct", the
147 // new HTML gets sent through the purifier, regardless of its
148 // status. This means that if we add a start token, because it
149 // was totally necessary, we don't have to update nesting; we just
150 // punt ($reprocess = true; continue;) and it does that for us.
151
152 // isset is in loop because $tokens size changes during loop exec
153 for (;;
154 // only increment if we don't need to reprocess
155 $reprocess ? $reprocess = false : $token = $zipper->next($token)) {
156
157 // check for a rewind
158 if (is_int($i)) {
159 // possibility: disable rewinding if the current token has a
160 // rewind set on it already. This would offer protection from
161 // infinite loop, but might hinder some advanced rewinding.
162 $rewind_offset = $this->injectors[$i]->getRewindOffset();
163 if (is_int($rewind_offset)) {
164 for ($j = 0; $j < $rewind_offset; $j++) {
165 if (empty($zipper->front)) break;
166 $token = $zipper->prev($token);
167 // indicate that other injectors should not process this token,
168 // but we need to reprocess it
169 unset($token->skip[$i]);
170 $token->rewind = $i;
171 if ($token instanceof HTMLPurifier_Token_Start) {
172 array_pop($this->stack);
173 } elseif ($token instanceof HTMLPurifier_Token_End) {
174 $this->stack[] = $token->start;
175 }
176 }
177 }
178 $i = false;
179 }
180
181 // handle case of document end
182 if ($token === NULL) {
183 // kill processing if stack is empty
184 if (empty($this->stack)) {
185 break;
186 }
187
188 // peek
189 $top_nesting = array_pop($this->stack);
190 $this->stack[] = $top_nesting;
191
192 // send error [TagClosedSuppress]
193 if ($e && !isset($top_nesting->armor['MakeWellFormed_TagClosedError'])) {
194 $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag closed by document end', $top_nesting);
195 }
196
197 // append, don't splice, since this is the end
198 $token = new HTMLPurifier_Token_End($top_nesting->name);
199
200 // punt!
201 $reprocess = true;
202 continue;
203 }
204
205 //echo '<br>'; printZipper($zipper, $token);//printTokens($this->stack);
206 //flush();
207
208 // quick-check: if it's not a tag, no need to process
209 if (empty($token->is_tag)) {
210 if ($token instanceof HTMLPurifier_Token_Text) {
211 foreach ($this->injectors as $i => $injector) {
212 if (isset($token->skip[$i])) {
213 continue;
214 }
215 if ($token->rewind !== null && $token->rewind !== $i) {
216 continue;
217 }
218 // XXX fuckup
219 $r = $token;
220 $injector->handleText($r);
221 $token = $this->processToken($r, $i);
222 $reprocess = true;
223 break;
224 }
225 }
226 // another possibility is a comment
227 continue;
228 }
229
230 if (isset($definition->info[$token->name])) {
231 $type = $definition->info[$token->name]->child->type;
232 } else {
233 $type = false; // Type is unknown, treat accordingly
234 }
235
236 // quick tag checks: anything that's *not* an end tag
237 $ok = false;
238 if ($type === 'empty' && $token instanceof HTMLPurifier_Token_Start) {
239 // claims to be a start tag but is empty
240 $token = new HTMLPurifier_Token_Empty(
241 $token->name,
242 $token->attr,
243 $token->line,
244 $token->col,
245 $token->armor
246 );
247 $ok = true;
248 } elseif ($type && $type !== 'empty' && $token instanceof HTMLPurifier_Token_Empty) {
249 // claims to be empty but really is a start tag
250 // NB: this assignment is required
251 $old_token = $token;
252 $token = new HTMLPurifier_Token_End($token->name);
253 $token = $this->insertBefore(
254 new HTMLPurifier_Token_Start($old_token->name, $old_token->attr, $old_token->line, $old_token->col, $old_token->armor)
255 );
256 // punt (since we had to modify the input stream in a non-trivial way)
257 $reprocess = true;
258 continue;
259 } elseif ($token instanceof HTMLPurifier_Token_Empty) {
260 // real empty token
261 $ok = true;
262 } elseif ($token instanceof HTMLPurifier_Token_Start) {
263 // start tag
264
265 // ...unless they also have to close their parent
266 if (!empty($this->stack)) {
267
268 // Performance note: you might think that it's rather
269 // inefficient, recalculating the autoclose information
270 // for every tag that a token closes (since when we
271 // do an autoclose, we push a new token into the
272 // stream and then /process/ that, before
273 // re-processing this token.) But this is
274 // necessary, because an injector can make an
275 // arbitrary transformations to the autoclosing
276 // tokens we introduce, so things may have changed
277 // in the meantime. Also, doing the inefficient thing is
278 // "easy" to reason about (for certain perverse definitions
279 // of "easy")
280
281 $parent = array_pop($this->stack);
282 $this->stack[] = $parent;
283
284 $parent_def = null;
285 $parent_elements = null;
286 $autoclose = false;
287 if (isset($definition->info[$parent->name])) {
288 $parent_def = $definition->info[$parent->name];
289 $parent_elements = $parent_def->child->getAllowedElements($config);
290 $autoclose = !isset($parent_elements[$token->name]);
291 }
292
293 if ($autoclose && $definition->info[$token->name]->wrap) {
294 // Check if an element can be wrapped by another
295 // element to make it valid in a context (for
296 // example, <ul><ul> needs a <li> in between)
297 $wrapname = $definition->info[$token->name]->wrap;
298 $wrapdef = $definition->info[$wrapname];
299 $elements = $wrapdef->child->getAllowedElements($config);
300 if (isset($elements[$token->name]) && isset($parent_elements[$wrapname])) {
301 $newtoken = new HTMLPurifier_Token_Start($wrapname);
302 $token = $this->insertBefore($newtoken);
303 $reprocess = true;
304 continue;
305 }
306 }
307
308 $carryover = false;
309 if ($autoclose && $parent_def->formatting) {
310 $carryover = true;
311 }
312
313 if ($autoclose) {
314 // check if this autoclose is doomed to fail
315 // (this rechecks $parent, which his harmless)
316 $autoclose_ok = isset($global_parent_allowed_elements[$token->name]);
317 if (!$autoclose_ok) {
318 foreach ($this->stack as $ancestor) {
319 $elements = $definition->info[$ancestor->name]->child->getAllowedElements($config);
320 if (isset($elements[$token->name])) {
321 $autoclose_ok = true;
322 break;
323 }
324 if ($definition->info[$token->name]->wrap) {
325 $wrapname = $definition->info[$token->name]->wrap;
326 $wrapdef = $definition->info[$wrapname];
327 $wrap_elements = $wrapdef->child->getAllowedElements($config);
328 if (isset($wrap_elements[$token->name]) && isset($elements[$wrapname])) {
329 $autoclose_ok = true;
330 break;
331 }
332 }
333 }
334 }
335 if ($autoclose_ok) {
336 // errors need to be updated
337 $new_token = new HTMLPurifier_Token_End($parent->name);
338 $new_token->start = $parent;
339 // [TagClosedSuppress]
340 if ($e && !isset($parent->armor['MakeWellFormed_TagClosedError'])) {
341 if (!$carryover) {
342 $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag auto closed', $parent);
343 } else {
344 $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag carryover', $parent);
345 }
346 }
347 if ($carryover) {
348 $element = clone $parent;
349 // [TagClosedAuto]
350 $element->armor['MakeWellFormed_TagClosedError'] = true;
351 $element->carryover = true;
352 $token = $this->processToken(array($new_token, $token, $element));
353 } else {
354 $token = $this->insertBefore($new_token);
355 }
356 } else {
357 $token = $this->remove();
358 }
359 $reprocess = true;
360 continue;
361 }
362
363 }
364 $ok = true;
365 }
366
367 if ($ok) {
368 foreach ($this->injectors as $i => $injector) {
369 if (isset($token->skip[$i])) {
370 continue;
371 }
372 if ($token->rewind !== null && $token->rewind !== $i) {
373 continue;
374 }
375 $r = $token;
376 $injector->handleElement($r);
377 $token = $this->processToken($r, $i);
378 $reprocess = true;
379 break;
380 }
381 if (!$reprocess) {
382 // ah, nothing interesting happened; do normal processing
383 if ($token instanceof HTMLPurifier_Token_Start) {
384 $this->stack[] = $token;
385 } elseif ($token instanceof HTMLPurifier_Token_End) {
386 throw new HTMLPurifier_Exception(
387 'Improper handling of end tag in start code; possible error in MakeWellFormed'
388 );
389 }
390 }
391 continue;
392 }
393
394 // sanity check: we should be dealing with a closing tag
395 if (!$token instanceof HTMLPurifier_Token_End) {
396 throw new HTMLPurifier_Exception('Unaccounted for tag token in input stream, bug in HTML Purifier');
397 }
398
399 // make sure that we have something open
400 if (empty($this->stack)) {
401 if ($escape_invalid_tags) {
402 if ($e) {
403 $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag to text');
404 }
405 $token = new HTMLPurifier_Token_Text($generator->generateFromToken($token));
406 } else {
407 if ($e) {
408 $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag removed');
409 }
410 $token = $this->remove();
411 }
412 $reprocess = true;
413 continue;
414 }
415
416 // first, check for the simplest case: everything closes neatly.
417 // Eventually, everything passes through here; if there are problems
418 // we modify the input stream accordingly and then punt, so that
419 // the tokens get processed again.
420 $current_parent = array_pop($this->stack);
421 if ($current_parent->name == $token->name) {
422 $token->start = $current_parent;
423 foreach ($this->injectors as $i => $injector) {
424 if (isset($token->skip[$i])) {
425 continue;
426 }
427 if ($token->rewind !== null && $token->rewind !== $i) {
428 continue;
429 }
430 $r = $token;
431 $injector->handleEnd($r);
432 $token = $this->processToken($r, $i);
433 $this->stack[] = $current_parent;
434 $reprocess = true;
435 break;
436 }
437 continue;
438 }
439
440 // okay, so we're trying to close the wrong tag
441
442 // undo the pop previous pop
443 $this->stack[] = $current_parent;
444
445 // scroll back the entire nest, trying to find our tag.
446 // (feature could be to specify how far you'd like to go)
447 $size = count($this->stack);
448 // -2 because -1 is the last element, but we already checked that
449 $skipped_tags = false;
450 for ($j = $size - 2; $j >= 0; $j--) {
451 if ($this->stack[$j]->name == $token->name) {
452 $skipped_tags = array_slice($this->stack, $j);
453 break;
454 }
455 }
456
457 // we didn't find the tag, so remove
458 if ($skipped_tags === false) {
459 if ($escape_invalid_tags) {
460 if ($e) {
461 $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag to text');
462 }
463 $token = new HTMLPurifier_Token_Text($generator->generateFromToken($token));
464 } else {
465 if ($e) {
466 $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag removed');
467 }
468 $token = $this->remove();
469 }
470 $reprocess = true;
471 continue;
472 }
473
474 // do errors, in REVERSE $j order: a,b,c with </a></b></c>
475 $c = count($skipped_tags);
476 if ($e) {
477 for ($j = $c - 1; $j > 0; $j--) {
478 // notice we exclude $j == 0, i.e. the current ending tag, from
479 // the errors... [TagClosedSuppress]
480 if (!isset($skipped_tags[$j]->armor['MakeWellFormed_TagClosedError'])) {
481 $e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag closed by element end', $skipped_tags[$j]);
482 }
483 }
484 }
485
486 // insert tags, in FORWARD $j order: c,b,a with </a></b></c>
487 $replace = array($token);
488 for ($j = 1; $j < $c; $j++) {
489 // ...as well as from the insertions
490 $new_token = new HTMLPurifier_Token_End($skipped_tags[$j]->name);
491 $new_token->start = $skipped_tags[$j];
492 array_unshift($replace, $new_token);
493 if (isset($definition->info[$new_token->name]) && $definition->info[$new_token->name]->formatting) {
494 // [TagClosedAuto]
495 $element = clone $skipped_tags[$j];
496 $element->carryover = true;
497 $element->armor['MakeWellFormed_TagClosedError'] = true;
498 $replace[] = $element;
499 }
500 }
501 $token = $this->processToken($replace);
502 $reprocess = true;
503 continue;
504 }
505
506 $context->destroy('CurrentToken');
507 $context->destroy('CurrentNesting');
508 $context->destroy('InputZipper');
509
510 unset($this->injectors, $this->stack, $this->tokens);
511 return $zipper->toArray($token);
512 }
513
514 /**
515 * Processes arbitrary token values for complicated substitution patterns.
516 * In general:
517 *
518 * If $token is an array, it is a list of tokens to substitute for the
519 * current token. These tokens then get individually processed. If there
520 * is a leading integer in the list, that integer determines how many
521 * tokens from the stream should be removed.
522 *
523 * If $token is a regular token, it is swapped with the current token.
524 *
525 * If $token is false, the current token is deleted.
526 *
527 * If $token is an integer, that number of tokens (with the first token
528 * being the current one) will be deleted.
529 *
530 * @param HTMLPurifier_Token|array|int|bool $token Token substitution value
531 * @param HTMLPurifier_Injector|int $injector Injector that performed the substitution; default is if
532 * this is not an injector related operation.
533 * @throws HTMLPurifier_Exception
534 */
535 protected function processToken($token, $injector = -1)
536 {
537 // normalize forms of token
538 if (is_object($token)) {
539 $token = array(1, $token);
540 }
541 if (is_int($token)) {
542 $token = array($token);
543 }
544 if ($token === false) {
545 $token = array(1);
546 }
547 if (!is_array($token)) {
548 throw new HTMLPurifier_Exception('Invalid token type from injector');
549 }
550 if (!is_int($token[0])) {
551 array_unshift($token, 1);
552 }
553 if ($token[0] === 0) {
554 throw new HTMLPurifier_Exception('Deleting zero tokens is not valid');
555 }
556
557 // $token is now an array with the following form:
558 // array(number nodes to delete, new node 1, new node 2, ...)
559
560 $delete = array_shift($token);
561 list($old, $r) = $this->zipper->splice($this->token, $delete, $token);
562
563 if ($injector > -1) {
564 // determine appropriate skips
565 $oldskip = isset($old[0]) ? $old[0]->skip : array();
566 foreach ($token as $object) {
567 $object->skip = $oldskip;
568 $object->skip[$injector] = true;
569 }
570 }
571
572 return $r;
573
574 }
575
576 /**
577 * Inserts a token before the current token. Cursor now points to
578 * this token. You must reprocess after this.
579 * @param HTMLPurifier_Token $token
580 */
581 private function insertBefore($token)
582 {
583 // NB not $this->zipper->insertBefore(), due to positioning
584 // differences
585 $splice = $this->zipper->splice($this->token, 0, array($token));
586
587 return $splice[1];
588 }
589
590 /**
591 * Removes current token. Cursor now points to new token occupying previously
592 * occupied space. You must reprocess after this.
593 */
594 private function remove()
595 {
596 return $this->zipper->delete();
597 }
598}
599
600// vim: et sw=4 sts=4
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/RemoveForeignElements.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/RemoveForeignElements.php
new file mode 100644
index 00000000..d1adf59f
--- /dev/null
+++ b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/RemoveForeignElements.php
@@ -0,0 +1,207 @@
1<?php
2
3/**
4 * Removes all unrecognized tags from the list of tokens.
5 *
6 * This strategy iterates through all the tokens and removes unrecognized
7 * tokens. If a token is not recognized but a TagTransform is defined for
8 * that element, the element will be transformed accordingly.
9 */
10
11class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
12{
13
14 /**
15 * @param HTMLPurifier_Token[] $tokens
16 * @param HTMLPurifier_Config $config
17 * @param HTMLPurifier_Context $context
18 * @return array|HTMLPurifier_Token[]
19 */
20 public function execute($tokens, $config, $context)
21 {
22 $definition = $config->getHTMLDefinition();
23 $generator = new HTMLPurifier_Generator($config, $context);
24 $result = array();
25
26 $escape_invalid_tags = $config->get('Core.EscapeInvalidTags');
27 $remove_invalid_img = $config->get('Core.RemoveInvalidImg');
28
29 // currently only used to determine if comments should be kept
30 $trusted = $config->get('HTML.Trusted');
31 $comment_lookup = $config->get('HTML.AllowedComments');
32 $comment_regexp = $config->get('HTML.AllowedCommentsRegexp');
33 $check_comments = $comment_lookup !== array() || $comment_regexp !== null;
34
35 $remove_script_contents = $config->get('Core.RemoveScriptContents');
36 $hidden_elements = $config->get('Core.HiddenElements');
37
38 // remove script contents compatibility
39 if ($remove_script_contents === true) {
40 $hidden_elements['script'] = true;
41 } elseif ($remove_script_contents === false && isset($hidden_elements['script'])) {
42 unset($hidden_elements['script']);
43 }
44
45 $attr_validator = new HTMLPurifier_AttrValidator();
46
47 // removes tokens until it reaches a closing tag with its value
48 $remove_until = false;
49
50 // converts comments into text tokens when this is equal to a tag name
51 $textify_comments = false;
52
53 $token = false;
54 $context->register('CurrentToken', $token);
55
56 $e = false;
57 if ($config->get('Core.CollectErrors')) {
58 $e =& $context->get('ErrorCollector');
59 }
60
61 foreach ($tokens as $token) {
62 if ($remove_until) {
63 if (empty($token->is_tag) || $token->name !== $remove_until) {
64 continue;
65 }
66 }
67 if (!empty($token->is_tag)) {
68 // DEFINITION CALL
69
70 // before any processing, try to transform the element
71 if (isset($definition->info_tag_transform[$token->name])) {
72 $original_name = $token->name;
73 // there is a transformation for this tag
74 // DEFINITION CALL
75 $token = $definition->
76 info_tag_transform[$token->name]->transform($token, $config, $context);
77 if ($e) {
78 $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Tag transform', $original_name);
79 }
80 }
81
82 if (isset($definition->info[$token->name])) {
83 // mostly everything's good, but
84 // we need to make sure required attributes are in order
85 if (($token instanceof HTMLPurifier_Token_Start || $token instanceof HTMLPurifier_Token_Empty) &&
86 $definition->info[$token->name]->required_attr &&
87 ($token->name != 'img' || $remove_invalid_img) // ensure config option still works
88 ) {
89 $attr_validator->validateToken($token, $config, $context);
90 $ok = true;
91 foreach ($definition->info[$token->name]->required_attr as $name) {
92 if (!isset($token->attr[$name])) {
93 $ok = false;
94 break;
95 }
96 }
97 if (!$ok) {
98 if ($e) {
99 $e->send(
100 E_ERROR,
101 'Strategy_RemoveForeignElements: Missing required attribute',
102 $name
103 );
104 }
105 continue;
106 }
107 $token->armor['ValidateAttributes'] = true;
108 }
109
110 if (isset($hidden_elements[$token->name]) && $token instanceof HTMLPurifier_Token_Start) {
111 $textify_comments = $token->name;
112 } elseif ($token->name === $textify_comments && $token instanceof HTMLPurifier_Token_End) {
113 $textify_comments = false;
114 }
115
116 } elseif ($escape_invalid_tags) {
117 // invalid tag, generate HTML representation and insert in
118 if ($e) {
119 $e->send(E_WARNING, 'Strategy_RemoveForeignElements: Foreign element to text');
120 }
121 $token = new HTMLPurifier_Token_Text(
122 $generator->generateFromToken($token)
123 );
124 } else {
125 // check if we need to destroy all of the tag's children
126 // CAN BE GENERICIZED
127 if (isset($hidden_elements[$token->name])) {
128 if ($token instanceof HTMLPurifier_Token_Start) {
129 $remove_until = $token->name;
130 } elseif ($token instanceof HTMLPurifier_Token_Empty) {
131 // do nothing: we're still looking
132 } else {
133 $remove_until = false;
134 }
135 if ($e) {
136 $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign meta element removed');
137 }
138 } else {
139 if ($e) {
140 $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign element removed');
141 }
142 }
143 continue;
144 }
145 } elseif ($token instanceof HTMLPurifier_Token_Comment) {
146 // textify comments in script tags when they are allowed
147 if ($textify_comments !== false) {
148 $data = $token->data;
149 $token = new HTMLPurifier_Token_Text($data);
150 } elseif ($trusted || $check_comments) {
151 // always cleanup comments
152 $trailing_hyphen = false;
153 if ($e) {
154 // perform check whether or not there's a trailing hyphen
155 if (substr($token->data, -1) == '-') {
156 $trailing_hyphen = true;
157 }
158 }
159 $token->data = rtrim($token->data, '-');
160 $found_double_hyphen = false;
161 while (strpos($token->data, '--') !== false) {
162 $found_double_hyphen = true;
163 $token->data = str_replace('--', '-', $token->data);
164 }
165 if ($trusted || !empty($comment_lookup[trim($token->data)]) ||
166 ($comment_regexp !== null && preg_match($comment_regexp, trim($token->data)))) {
167 // OK good
168 if ($e) {
169 if ($trailing_hyphen) {
170 $e->send(
171 E_NOTICE,
172 'Strategy_RemoveForeignElements: Trailing hyphen in comment removed'
173 );
174 }
175 if ($found_double_hyphen) {
176 $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Hyphens in comment collapsed');
177 }
178 }
179 } else {
180 if ($e) {
181 $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Comment removed');
182 }
183 continue;
184 }
185 } else {
186 // strip comments
187 if ($e) {
188 $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Comment removed');
189 }
190 continue;
191 }
192 } elseif ($token instanceof HTMLPurifier_Token_Text) {
193 } else {
194 continue;
195 }
196 $result[] = $token;
197 }
198 if ($remove_until && $e) {
199 // we removed tokens until the end, throw error
200 $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Token removed to end', $remove_until);
201 }
202 $context->destroy('CurrentToken');
203 return $result;
204 }
205}
206
207// vim: et sw=4 sts=4
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/ValidateAttributes.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/ValidateAttributes.php
new file mode 100644
index 00000000..428f975f
--- /dev/null
+++ b/inc/3rdparty/htmlpurifier/HTMLPurifier/Strategy/ValidateAttributes.php
@@ -0,0 +1,45 @@
1<?php
2
3/**
4 * Validate all attributes in the tokens.
5 */
6
7class HTMLPurifier_Strategy_ValidateAttributes extends HTMLPurifier_Strategy
8{
9
10 /**
11 * @param HTMLPurifier_Token[] $tokens
12 * @param HTMLPurifier_Config $config
13 * @param HTMLPurifier_Context $context
14 * @return HTMLPurifier_Token[]
15 */
16 public function execute($tokens, $config, $context)
17 {
18 // setup validator
19 $validator = new HTMLPurifier_AttrValidator();
20
21 $token = false;
22 $context->register('CurrentToken', $token);
23
24 foreach ($tokens as $key => $token) {
25
26 // only process tokens that have attributes,
27 // namely start and empty tags
28 if (!$token instanceof HTMLPurifier_Token_Start && !$token instanceof HTMLPurifier_Token_Empty) {
29 continue;
30 }
31
32 // skip tokens that are armored
33 if (!empty($token->armor['ValidateAttributes'])) {
34 continue;
35 }
36
37 // note that we have no facilities here for removing tokens
38 $validator->validateToken($token, $config, $context);
39 }
40 $context->destroy('CurrentToken');
41 return $tokens;
42 }
43}
44
45// vim: et sw=4 sts=4
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-11 09:43:38 +0000