initial checkin

1 files changed, 283 insertions, 0 deletions

diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/Injector.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/Injector.php
new file mode 100644
index 0000000..116b470
--- /dev/null
+++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/Injector.php
@@ -0,0 +1,283 @@
+<?php
+
+/**
+ * Injects tokens into the document while parsing for well-formedness.
+ * This enables "formatter-like" functionality such as auto-paragraphing,
+ * smiley-ification and linkification to take place.
+ *
+ * A note on how handlers create changes; this is done by assigning a new
+ * value to the $token reference. These values can take a variety of forms and
+ * are best described HTMLPurifier_Strategy_MakeWellFormed->processToken()
+ * documentation.
+ *
+ * @todo Allow injectors to request a re-run on their output. This
+ *       would help if an operation is recursive.
+ */
+abstract class HTMLPurifier_Injector
+{
+
+    /**
+     * Advisory name of injector, this is for friendly error messages.
+     * @type string
+     */
+    public $name;
+
+    /**
+     * @type HTMLPurifier_HTMLDefinition
+     */
+    protected $htmlDefinition;
+
+    /**
+     * Reference to CurrentNesting variable in Context. This is an array
+     * list of tokens that we are currently "inside"
+     * @type array
+     */
+    protected $currentNesting;
+
+    /**
+     * Reference to current token.
+     * @type HTMLPurifier_Token
+     */
+    protected $currentToken;
+
+    /**
+     * Reference to InputZipper variable in Context.
+     * @type HTMLPurifier_Zipper
+     */
+    protected $inputZipper;
+
+    /**
+     * Array of elements and attributes this injector creates and therefore
+     * need to be allowed by the definition. Takes form of
+     * array('element' => array('attr', 'attr2'), 'element2')
+     * @type array
+     */
+    public $needed = array();
+
+    /**
+     * Number of elements to rewind backwards (relative).
+     * @type bool|int
+     */
+    protected $rewindOffset = false;
+
+    /**
+     * Rewind to a spot to re-perform processing. This is useful if you
+     * deleted a node, and now need to see if this change affected any
+     * earlier nodes. Rewinding does not affect other injectors, and can
+     * result in infinite loops if not used carefully.
+     * @param bool|int $offset
+     * @warning HTML Purifier will prevent you from fast-forwarding with this
+     *          function.
+     */
+    public function rewindOffset($offset)
+    {
+        $this->rewindOffset = $offset;
+    }
+
+    /**
+     * Retrieves rewind offset, and then unsets it.
+     * @return bool|int
+     */
+    public function getRewindOffset()
+    {
+        $r = $this->rewindOffset;
+        $this->rewindOffset = false;
+        return $r;
+    }
+
+    /**
+     * Prepares the injector by giving it the config and context objects:
+     * this allows references to important variables to be made within
+     * the injector. This function also checks if the HTML environment
+     * will work with the Injector (see checkNeeded()).
+     * @param HTMLPurifier_Config $config
+     * @param HTMLPurifier_Context $context
+     * @return bool|string Boolean false if success, string of missing needed element/attribute if failure
+     */
+    public function prepare($config, $context)
+    {
+        $this->htmlDefinition = $config->getHTMLDefinition();
+        // Even though this might fail, some unit tests ignore this and
+        // still test checkNeeded, so be careful. Maybe get rid of that
+        // dependency.
+        $result = $this->checkNeeded($config);
+        if ($result !== false) {
+            return $result;
+        }
+        $this->currentNesting =& $context->get('CurrentNesting');
+        $this->currentToken   =& $context->get('CurrentToken');
+        $this->inputZipper    =& $context->get('InputZipper');
+        return false;
+    }
+
+    /**
+     * This function checks if the HTML environment
+     * will work with the Injector: if p tags are not allowed, the
+     * Auto-Paragraphing injector should not be enabled.
+     * @param HTMLPurifier_Config $config
+     * @return bool|string Boolean false if success, string of missing needed element/attribute if failure
+     */
+    public function checkNeeded($config)
+    {
+        $def = $config->getHTMLDefinition();
+        foreach ($this->needed as $element => $attributes) {
+            if (is_int($element)) {
+                $element = $attributes;
+            }
+            if (!isset($def->info[$element])) {
+                return $element;
+            }
+            if (!is_array($attributes)) {
+                continue;
+            }
+            foreach ($attributes as $name) {
+                if (!isset($def->info[$element]->attr[$name])) {
+                    return "$element.$name";
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Tests if the context node allows a certain element
+     * @param string $name Name of element to test for
+     * @return bool True if element is allowed, false if it is not
+     */
+    public function allowsElement($name)
+    {
+        if (!empty($this->currentNesting)) {
+            $parent_token = array_pop($this->currentNesting);
+            $this->currentNesting[] = $parent_token;
+            $parent = $this->htmlDefinition->info[$parent_token->name];
+        } else {
+            $parent = $this->htmlDefinition->info_parent_def;
+        }
+        if (!isset($parent->child->elements[$name]) || isset($parent->excludes[$name])) {
+            return false;
+        }
+        // check for exclusion
+        if (!empty($this->currentNesting)) {
+            for ($i = count($this->currentNesting) - 2; $i >= 0; $i--) {
+                $node = $this->currentNesting[$i];
+                $def  = $this->htmlDefinition->info[$node->name];
+                if (isset($def->excludes[$name])) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Iterator function, which starts with the next token and continues until
+     * you reach the end of the input tokens.
+     * @warning Please prevent previous references from interfering with this
+     *          functions by setting $i = null beforehand!
+     * @param int $i Current integer index variable for inputTokens
+     * @param HTMLPurifier_Token $current Current token variable.
+     *          Do NOT use $token, as that variable is also a reference
+     * @return bool
+     */
+    protected function forward(&$i, &$current)
+    {
+        if ($i === null) {
+            $i = count($this->inputZipper->back) - 1;
+        } else {
+            $i--;
+        }
+        if ($i < 0) {
+            return false;
+        }
+        $current = $this->inputZipper->back[$i];
+        return true;
+    }
+
+    /**
+     * Similar to _forward, but accepts a third parameter $nesting (which
+     * should be initialized at 0) and stops when we hit the end tag
+     * for the node $this->inputIndex starts in.
+     * @param int $i Current integer index variable for inputTokens
+     * @param HTMLPurifier_Token $current Current token variable.
+     *          Do NOT use $token, as that variable is also a reference
+     * @param int $nesting
+     * @return bool
+     */
+    protected function forwardUntilEndToken(&$i, &$current, &$nesting)
+    {
+        $result = $this->forward($i, $current);
+        if (!$result) {
+            return false;
+        }
+        if ($nesting === null) {
+            $nesting = 0;
+        }
+        if ($current instanceof HTMLPurifier_Token_Start) {
+            $nesting++;
+        } elseif ($current instanceof HTMLPurifier_Token_End) {
+            if ($nesting <= 0) {
+                return false;
+            }
+            $nesting--;
+        }
+        return true;
+    }
+
+    /**
+     * Iterator function, starts with the previous token and continues until
+     * you reach the beginning of input tokens.
+     * @warning Please prevent previous references from interfering with this
+     *          functions by setting $i = null beforehand!
+     * @param int $i Current integer index variable for inputTokens
+     * @param HTMLPurifier_Token $current Current token variable.
+     *          Do NOT use $token, as that variable is also a reference
+     * @return bool
+     */
+    protected function backward(&$i, &$current)
+    {
+        if ($i === null) {
+            $i = count($this->inputZipper->front) - 1;
+        } else {
+            $i--;
+        }
+        if ($i < 0) {
+            return false;
+        }
+        $current = $this->inputZipper->front[$i];
+        return true;
+    }
+
+    /**
+     * Handler that is called when a text token is processed
+     */
+    public function handleText(&$token)
+    {
+    }
+
+    /**
+     * Handler that is called when a start or empty token is processed
+     */
+    public function handleElement(&$token)
+    {
+    }
+
+    /**
+     * Handler that is called when an end token is processed
+     */
+    public function handleEnd(&$token)
+    {
+        $this->notifyEnd($token);
+    }
+
+    /**
+     * Notifier that is called when an end token is processed
+     * @param HTMLPurifier_Token $token Current token variable.
+     * @note This differs from handlers in that the token is read-only
+     * @deprecated
+     */
+    public function notifyEnd($token)
+    {
+    }
+}
+
+// vim: et sw=4 sts=4