PHP HTMLPurifier_Generator::generateFromToken方法代码示例

 function execute($tokens, $config, &$context)
 {
     $definition = $config->getHTMLDefinition();
     $generator = new HTMLPurifier_Generator();
     $result = array();
     $escape_invalid_tags = $config->get('Core', 'EscapeInvalidTags');
     $remove_invalid_img = $config->get('Core', 'RemoveInvalidImg');
     $remove_script_contents = $config->get('Core', 'RemoveScriptContents');
     $hidden_elements = $config->get('Core', 'HiddenElements');
     // remove script contents compatibility
     if ($remove_script_contents === true) {
         $hidden_elements['script'] = true;
     } elseif ($remove_script_contents === false && isset($hidden_elements['script'])) {
         unset($hidden_elements['script']);
     }
     $attr_validator = new HTMLPurifier_AttrValidator();
     // removes tokens until it reaches a closing tag with its value
     $remove_until = false;
     // converts comments into text tokens when this is equal to a tag name
     $textify_comments = false;
     $token = false;
     $context->register('CurrentToken', $token);
     $e = false;
     if ($config->get('Core', 'CollectErrors')) {
         $e =& $context->get('ErrorCollector');
     }
     foreach ($tokens as $token) {
         if ($remove_until) {
             if (empty($token->is_tag) || $token->name !== $remove_until) {
                 continue;
             }
         }
         if (!empty($token->is_tag)) {
             // DEFINITION CALL
             // before any processing, try to transform the element
             if (isset($definition->info_tag_transform[$token->name])) {
                 $original_name = $token->name;
                 // there is a transformation for this tag
                 // DEFINITION CALL
                 $token = $definition->info_tag_transform[$token->name]->transform($token, $config, $context);
                 if ($e) {
                     $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Tag transform', $original_name);
                 }
             }
             if (isset($definition->info[$token->name])) {
                 // mostly everything's good, but
                 // we need to make sure required attributes are in order
                 if (($token->type === 'start' || $token->type === 'empty') && $definition->info[$token->name]->required_attr && ($token->name != 'img' || $remove_invalid_img)) {
                     $attr_validator->validateToken($token, $config, $context);
                     $ok = true;
                     foreach ($definition->info[$token->name]->required_attr as $name) {
                         if (!isset($token->attr[$name])) {
                             $ok = false;
                             break;
                         }
                     }
                     if (!$ok) {
                         if ($e) {
                             $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Missing required attribute', $name);
                         }
                         continue;
                     }
                     $token->armor['ValidateAttributes'] = true;
                 }
                 if (isset($hidden_elements[$token->name]) && $token->type == 'start') {
                     $textify_comments = $token->name;
                 } elseif ($token->name === $textify_comments && $token->type == 'end') {
                     $textify_comments = false;
                 }
             } elseif ($escape_invalid_tags) {
                 // invalid tag, generate HTML representation and insert in
                 if ($e) {
                     $e->send(E_WARNING, 'Strategy_RemoveForeignElements: Foreign element to text');
                 }
                 $token = new HTMLPurifier_Token_Text($generator->generateFromToken($token, $config, $context));
             } else {
                 // check if we need to destroy all of the tag's children
                 // CAN BE GENERICIZED
                 if (isset($hidden_elements[$token->name])) {
                     if ($token->type == 'start') {
                         $remove_until = $token->name;
                     } elseif ($token->type == 'empty') {
                         // do nothing: we're still looking
                     } else {
                         $remove_until = false;
                     }
                     if ($e) {
                         $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign meta element removed');
                     }
                 } else {
                     if ($e) {
                         $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign element removed');
                     }
                 }
                 continue;
             }
         } elseif ($token->type == 'comment') {
             // textify comments in script tags when they are allowed
             if ($textify_comments !== false) {
                 $data = $token->data;
//.........这里部分代码省略.........

 /**
  * @param HTMLPurifier_Token[] $tokens
  * @param HTMLPurifier_Config $config
  * @param HTMLPurifier_Context $context
  * @return array|HTMLPurifier_Token[]
  */
 public function execute($tokens, $config, $context)
 {
     $definition = $config->getHTMLDefinition();
     $generator = new HTMLPurifier_Generator($config, $context);
     $result = array();
     $escape_invalid_tags = $config->get('Core.EscapeInvalidTags');
     $remove_invalid_img = $config->get('Core.RemoveInvalidImg');
     // currently only used to determine if comments should be kept
     $trusted = $config->get('HTML.Trusted');
     $comment_lookup = $config->get('HTML.AllowedComments');
     $comment_regexp = $config->get('HTML.AllowedCommentsRegexp');
     $check_comments = $comment_lookup !== array() || $comment_regexp !== null;
     $remove_script_contents = $config->get('Core.RemoveScriptContents');
     $hidden_elements = $config->get('Core.HiddenElements');
     // remove script contents compatibility
     if ($remove_script_contents === true) {
         $hidden_elements['script'] = true;
     } elseif ($remove_script_contents === false && isset($hidden_elements['script'])) {
         unset($hidden_elements['script']);
     }
     $attr_validator = new HTMLPurifier_AttrValidator();
     // removes tokens until it reaches a closing tag with its value
     $remove_until = false;
     // converts comments into text tokens when this is equal to a tag name
     $textify_comments = false;
     $token = false;
     $context->register('CurrentToken', $token);
     $e = false;
     if ($config->get('Core.CollectErrors')) {
         $e =& $context->get('ErrorCollector');
     }
     foreach ($tokens as $token) {
         if ($remove_until) {
             if (empty($token->is_tag) || $token->name !== $remove_until) {
                 continue;
             }
         }
         if (!empty($token->is_tag)) {
             // DEFINITION CALL
             // before any processing, try to transform the element
             if (isset($definition->info_tag_transform[$token->name])) {
                 $original_name = $token->name;
                 // there is a transformation for this tag
                 // DEFINITION CALL
                 $token = $definition->info_tag_transform[$token->name]->transform($token, $config, $context);
                 if ($e) {
                     $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Tag transform', $original_name);
                 }
             }
             if (isset($definition->info[$token->name])) {
                 // mostly everything's good, but
                 // we need to make sure required attributes are in order
                 if (($token instanceof HTMLPurifier_Token_Start || $token instanceof HTMLPurifier_Token_Empty) && $definition->info[$token->name]->required_attr && ($token->name != 'img' || $remove_invalid_img)) {
                     $attr_validator->validateToken($token, $config, $context);
                     $ok = true;
                     foreach ($definition->info[$token->name]->required_attr as $name) {
                         if (!isset($token->attr[$name])) {
                             $ok = false;
                             break;
                         }
                     }
                     if (!$ok) {
                         if ($e) {
                             $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Missing required attribute', $name);
                         }
                         continue;
                     }
                     $token->armor['ValidateAttributes'] = true;
                 }
                 if (isset($hidden_elements[$token->name]) && $token instanceof HTMLPurifier_Token_Start) {
                     $textify_comments = $token->name;
                 } elseif ($token->name === $textify_comments && $token instanceof HTMLPurifier_Token_End) {
                     $textify_comments = false;
                 }
             } elseif ($escape_invalid_tags) {
                 // invalid tag, generate HTML representation and insert in
                 if ($e) {
                     $e->send(E_WARNING, 'Strategy_RemoveForeignElements: Foreign element to text');
                 }
                 $token = new HTMLPurifier_Token_Text($generator->generateFromToken($token));
             } else {
                 // check if we need to destroy all of the tag's children
                 // CAN BE GENERICIZED
                 if (isset($hidden_elements[$token->name])) {
                     if ($token instanceof HTMLPurifier_Token_Start) {
                         $remove_until = $token->name;
                     } elseif ($token instanceof HTMLPurifier_Token_Empty) {
                         // do nothing: we're still looking
                     } else {
                         $remove_until = false;
                     }
                     if ($e) {
                         $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign meta element removed');
                     }
//.........这里部分代码省略.........

//.........这里部分代码省略.........
             foreach ($this->injectors as $i => $injector) {
                 if (isset($token->skip[$i])) {
                     continue;
                 }
                 if ($token->rewind !== null && $token->rewind !== $i) {
                     continue;
                 }
                 $injector->handleElement($token);
                 $this->processToken($token, $i);
                 $reprocess = true;
                 break;
             }
             if (!$reprocess) {
                 // ah, nothing interesting happened; do normal processing
                 $this->swap($token);
                 if ($token instanceof HTMLPurifier_Token_Start) {
                     $this->stack[] = $token;
                 } elseif ($token instanceof HTMLPurifier_Token_End) {
                     throw new HTMLPurifier_Exception('Improper handling of end tag in start code; possible error in MakeWellFormed');
                 }
             }
             continue;
         }
         // sanity check: we should be dealing with a closing tag
         if (!$token instanceof HTMLPurifier_Token_End) {
             throw new HTMLPurifier_Exception('Unaccounted for tag token in input stream, bug in HTML Purifier');
         }
         // make sure that we have something open
         if (empty($this->stack)) {
             if ($escape_invalid_tags) {
                 if ($e) {
                     $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag to text');
                 }
                 $this->swap(new HTMLPurifier_Token_Text($generator->generateFromToken($token)));
             } else {
                 $this->remove();
                 if ($e) {
                     $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag removed');
                 }
             }
             $reprocess = true;
             continue;
         }
         // first, check for the simplest case: everything closes neatly.
         // Eventually, everything passes through here; if there are problems
         // we modify the input stream accordingly and then punt, so that
         // the tokens get processed again.
         $current_parent = array_pop($this->stack);
         if ($current_parent->name == $token->name) {
             $token->start = $current_parent;
             foreach ($this->injectors as $i => $injector) {
                 if (isset($token->skip[$i])) {
                     continue;
                 }
                 if ($token->rewind !== null && $token->rewind !== $i) {
                     continue;
                 }
                 $injector->handleEnd($token);
                 $this->processToken($token, $i);
                 $this->stack[] = $current_parent;
                 $reprocess = true;
                 break;
             }
             continue;
         }
         // okay, so we're trying to close the wrong tag

//.........这里部分代码省略.........
                     $result[] = $token;
                     $this->currentNesting[] = $token;
                     continue;
                 }
                 $this->currentNesting[] = $parent;
                 // undo the pop
             }
             $ok = true;
         }
         // injector handler code; duplicated for performance reasons
         if ($ok) {
             foreach ($this->injectors as $i => $injector) {
                 if (!$injector->skip) {
                     $injector->handleElement($token);
                 }
                 if (is_array($token)) {
                     $this->currentInjector = $i;
                     break;
                 }
             }
             $this->processToken($token, $config, $context);
             continue;
         }
         // sanity check: we should be dealing with a closing tag
         if ($token->type != 'end') {
             continue;
         }
         // make sure that we have something open
         if (empty($this->currentNesting)) {
             if ($escape_invalid_tags) {
                 if ($e) {
                     $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag to text');
                 }
                 $result[] = new HTMLPurifier_Token_Text($generator->generateFromToken($token, $config, $context));
             } elseif ($e) {
                 $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag removed');
             }
             continue;
         }
         // first, check for the simplest case: everything closes neatly
         $current_parent = array_pop($this->currentNesting);
         if ($current_parent->name == $token->name) {
             $result[] = $token;
             foreach ($this->injectors as $i => $injector) {
                 $injector->notifyEnd($token);
             }
             continue;
         }
         // okay, so we're trying to close the wrong tag
         // undo the pop previous pop
         $this->currentNesting[] = $current_parent;
         // scroll back the entire nest, trying to find our tag.
         // (feature could be to specify how far you'd like to go)
         $size = count($this->currentNesting);
         // -2 because -1 is the last element, but we already checked that
         $skipped_tags = false;
         for ($i = $size - 2; $i >= 0; $i--) {
             if ($this->currentNesting[$i]->name == $token->name) {
                 // current nesting is modified
                 $skipped_tags = array_splice($this->currentNesting, $i);
                 break;
             }
         }
         // we still didn't find the tag, so remove
         if ($skipped_tags === false) {
             if ($escape_invalid_tags) {

 public function validateChildren($tokens_of_children, $config, $context)
 {
     // Flag for subclasses
     $this->whitespace = false;
     // if there are no tokens, delete parent node
     if (empty($tokens_of_children)) {
         return false;
     }
     // the new set of children
     $result = array();
     // current depth into the nest
     $nesting = 0;
     // whether or not we're deleting a node
     $is_deleting = false;
     // whether or not parsed character data is allowed
     // this controls whether or not we silently drop a tag
     // or generate escaped HTML from it
     $pcdata_allowed = isset($this->elements['#PCDATA']);
     // a little sanity check to make sure it's not ALL whitespace
     $all_whitespace = true;
     // some configuration
     $escape_invalid_children = $config->get('Core', 'EscapeInvalidChildren');
     // generator
     $gen = new HTMLPurifier_Generator($config, $context);
     foreach ($tokens_of_children as $token) {
         if (!empty($token->is_whitespace)) {
             $result[] = $token;
             continue;
         }
         $all_whitespace = false;
         // phew, we're not talking about whitespace
         $is_child = $nesting == 0;
         if ($token instanceof HTMLPurifier_Token_Start) {
             $nesting++;
         } elseif ($token instanceof HTMLPurifier_Token_End) {
             $nesting--;
         }
         if ($is_child) {
             $is_deleting = false;
             if (!isset($this->elements[$token->name])) {
                 $is_deleting = true;
                 if ($pcdata_allowed && $token instanceof HTMLPurifier_Token_Text) {
                     $result[] = $token;
                 } elseif ($pcdata_allowed && $escape_invalid_children) {
                     $result[] = new HTMLPurifier_Token_Text($gen->generateFromToken($token));
                 }
                 continue;
             }
         }
         if (!$is_deleting || $pcdata_allowed && $token instanceof HTMLPurifier_Token_Text) {
             $result[] = $token;
         } elseif ($pcdata_allowed && $escape_invalid_children) {
             $result[] = new HTMLPurifier_Token_Text($gen->generateFromToken($token));
         } else {
             // drop silently
         }
     }
     if (empty($result)) {
         return false;
     }
     if ($all_whitespace) {
         $this->whitespace = true;
         return false;
     }
     if ($tokens_of_children == $result) {
         return true;
     }
     return $result;
 }

/**
 * Debugging function that prints tokens in a user-friendly manner.
 */
function printTokens($tokens, $index = null)
{
    $string = '<pre>';
    $generator = new HTMLPurifier_Generator(HTMLPurifier_Config::createDefault(), new HTMLPurifier_Context());
    foreach ($tokens as $i => $token) {
        if ($index === $i) {
            $string .= '[<strong>';
        }
        $string .= "<sup>{$i}</sup>";
        $string .= $generator->escape($generator->generateFromToken($token));
        if ($index === $i) {
            $string .= '</strong>]';
        }
    }
    $string .= '</pre>';
    echo $string;
}

 public function execute($tokens, $config, $context)
 {
     $definition = $config->getHTMLDefinition();
     $generator = new HTMLPurifier_Generator($config, $context);
     $result = array();
     $escape_invalid_tags = $config->get('Core.EscapeInvalidTags');
     $remove_invalid_img = $config->get('Core.RemoveInvalidImg');
     $trusted = $config->get('HTML.Trusted');
     $comment_lookup = $config->get('HTML.AllowedComments');
     $comment_regexp = $config->get('HTML.AllowedCommentsRegexp');
     $check_comments = $comment_lookup !== array() || $comment_regexp !== null;
     $remove_script_contents = $config->get('Core.RemoveScriptContents');
     $hidden_elements = $config->get('Core.HiddenElements');
     if ($remove_script_contents === true) {
         $hidden_elements['script'] = true;
     } elseif ($remove_script_contents === false && isset($hidden_elements['script'])) {
         unset($hidden_elements['script']);
     }
     $attr_validator = new HTMLPurifier_AttrValidator();
     $remove_until = false;
     $textify_comments = false;
     $token = false;
     $context->register('CurrentToken', $token);
     $e = false;
     if ($config->get('Core.CollectErrors')) {
         $e =& $context->get('ErrorCollector');
     }
     foreach ($tokens as $token) {
         if ($remove_until) {
             if (empty($token->is_tag) || $token->name !== $remove_until) {
                 continue;
             }
         }
         if (!empty($token->is_tag)) {
             if (isset($definition->info_tag_transform[$token->name])) {
                 $original_name = $token->name;
                 $token = $definition->info_tag_transform[$token->name]->transform($token, $config, $context);
                 if ($e) {
                     $e->send(E_NOTICE, 'Strategy_RemoveForeignElements: Tag transform', $original_name);
                 }
             }
             if (isset($definition->info[$token->name])) {
                 if (($token instanceof HTMLPurifier_Token_Start || $token instanceof HTMLPurifier_Token_Empty) && $definition->info[$token->name]->required_attr && ($token->name != 'img' || $remove_invalid_img)) {
                     $attr_validator->validateToken($token, $config, $context);
                     $ok = true;
                     foreach ($definition->info[$token->name]->required_attr as $name) {
                         if (!isset($token->attr[$name])) {
                             $ok = false;
                             break;
                         }
                     }
                     if (!$ok) {
                         if ($e) {
                             $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Missing required attribute', $name);
                         }
                         continue;
                     }
                     $token->armor['ValidateAttributes'] = true;
                 }
                 if (isset($hidden_elements[$token->name]) && $token instanceof HTMLPurifier_Token_Start) {
                     $textify_comments = $token->name;
                 } elseif ($token->name === $textify_comments && $token instanceof HTMLPurifier_Token_End) {
                     $textify_comments = false;
                 }
             } elseif ($escape_invalid_tags) {
                 if ($e) {
                     $e->send(E_WARNING, 'Strategy_RemoveForeignElements: Foreign element to text');
                 }
                 $token = new HTMLPurifier_Token_Text($generator->generateFromToken($token));
             } else {
                 if (isset($hidden_elements[$token->name])) {
                     if ($token instanceof HTMLPurifier_Token_Start) {
                         $remove_until = $token->name;
                     } elseif ($token instanceof HTMLPurifier_Token_Empty) {
                     } else {
                         $remove_until = false;
                     }
                     if ($e) {
                         $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign meta element removed');
                     }
                 } else {
                     if ($e) {
                         $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign element removed');
                     }
                 }
                 continue;
             }
         } elseif ($token instanceof HTMLPurifier_Token_Comment) {
             if ($textify_comments !== false) {
                 $data = $token->data;
                 $token = new HTMLPurifier_Token_Text($data);
             } elseif ($trusted || $check_comments) {
                 $trailing_hyphen = false;
                 if ($e) {
                     if (substr($token->data, -1) == '-') {
                         $trailing_hyphen = true;
                     }
                 }
                 $token->data = rtrim($token->data, '-');
                 $found_double_hyphen = false;
//.........这里部分代码省略.........