Injects tokens into the document while parsing for well-formedness. More...

Inheritance diagram for HTMLPurifier_Injector:

Collaboration diagram for HTMLPurifier_Injector:

Public Member Functions
	rewind ($index)
	Rewind to a spot to re-perform processing.
	getRewind ()
	Retrieves rewind, and then unsets it.
	prepare ($config, $context)
	Prepares the injector by giving it the config and context objects: this allows references to important variables to be made within the injector.
	checkNeeded ($config)
	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.
	allowsElement ($name)
	Tests if the context node allows a certain element.
	handleText (&$token)
	Handler that is called when a text token is processed.
	handleElement (&$token)
	Handler that is called when a start or empty token is processed.
	handleEnd (&$token)
	Handler that is called when an end token is processed.
	notifyEnd ($token)
	Notifier that is called when an end token is processed.

Data Fields
	$name
	Advisory name of injector, this is for friendly error messages.
	$needed = array()
	Array of elements and attributes this injector creates and therefore need to be allowed by the definition.

Protected Member Functions
	forward (&$i, &$current)
	Iterator function, which starts with the next token and continues until you reach the end of the input tokens.
	forwardUntilEndToken (&$i, &$current, &$nesting)
	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 $this->inputIndex starts in.
	backward (&$i, &$current)
	Iterator function, starts with the previous token and continues until you reach the beginning of input tokens.
	current (&$i, &$current)
	Initializes the iterator at the current position.

Protected Attributes
	$htmlDefinition
	Instance of HTMLPurifier_HTMLDefinition.
	$currentNesting
	Reference to CurrentNesting variable in Context.
	$inputTokens
	Reference to InputTokens variable in Context.
	$inputIndex
	Reference to InputIndex variable in Context.
	$rewind = false
	Index of inputTokens to rewind to.

Detailed Description

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.

Definition at line 16 of file Injector.php.

Member Function Documentation

HTMLPurifier_Injector::allowsElement ( $name )

Tests if the context node allows a certain element.

Parameters

$name Name of element to test for

Returns: True if element is allowed, false if it is not

Definition at line 129 of file Injector.php.

References $name.

Referenced by HTMLPurifier_Injector_AutoParagraph\handleElement(), HTMLPurifier_Injector_Linkify\handleText(), HTMLPurifier_Injector_PurifierLinkify\handleText(), and HTMLPurifier_Injector_AutoParagraph\handleText().

                                         {
        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[$name])) {
            return false;
        }
        // check for exclusion
        for ($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;
    }

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HTMLPurifier_Injector::backward	(	&	$i,
		&	$current
	)

protected

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!

Parameters

&$i	Current integer index variable for inputTokens
&$current	Current token variable. Do NOT use $token, as that variable is also a reference

Definition at line 190 of file Injector.php.

Referenced by HTMLPurifier_Injector_AutoParagraph\handleElement().

                                                {
        if ($i === null) $i = $this->inputIndex - 1;
        else $i--;
        if ($i < 0) return false;
        $current = $this->inputTokens[$i];
        return true;
    }

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HTMLPurifier_Injector::checkNeeded ( $config )

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.

Parameters

$config	Instance of HTMLPurifier_Config
$context	Instance of HTMLPurifier_Context

Returns: Boolean false if success, string of missing needed element/attribute if failure

Definition at line 111 of file Injector.php.

References $config, and $name.

Referenced by prepare().

                                         {
        $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;
    }

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HTMLPurifier_Injector::current	(	&	$i,
		&	$current
	)

protected

Initializes the iterator at the current position.

Use in a do {} while; loop to force the _forward and _backward functions to start at the current location.

Warning: Please prevent previous references from interfering with this functions by setting $i = null beforehand!

Parameters

&$i	Current integer index variable for inputTokens
&$current	Current token variable. Do NOT use $token, as that variable is also a reference

Definition at line 207 of file Injector.php.

References $inputIndex.

Referenced by HTMLPurifier_Injector_AutoParagraph\_pLookAhead().

                                               {
        if ($i === null) $i = $this->inputIndex;
        $current = $this->inputTokens[$i];
    }

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HTMLPurifier_Injector::forward	(	&	$i,
		&	$current
	)

protected

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!

Parameters

&$i	Current integer index variable for inputTokens
&$current	Current token variable. Do NOT use $token, as that variable is also a reference

Definition at line 157 of file Injector.php.

Referenced by forwardUntilEndToken().

                                               {
        if ($i === null) $i = $this->inputIndex + 1;
        else $i++;
        if (!isset($this->inputTokens[$i])) return false;
        $current = $this->inputTokens[$i];
        return true;
    }

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HTMLPurifier_Injector::forwardUntilEndToken	(	&	$i,
		&	$current,
		&	$nesting
	)

protected

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.

Definition at line 170 of file Injector.php.

References forward().

Referenced by HTMLPurifier_Injector_AutoParagraph\_pLookAhead(), and HTMLPurifier_Injector_AutoParagraph\handleText().

                                                                       {
        $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;
    }

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HTMLPurifier_Injector::getRewind ( )

Retrieves rewind, and then unsets it.

Definition at line 75 of file Injector.php.

References $rewind, and rewind().

                                {
        $r = $this->rewind;
        $this->rewind = false;
        return $r;
    }

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HTMLPurifier_Injector::handleElement ( & $token )

Handler that is called when a start or empty token is processed.

Reimplemented in HTMLPurifier_Injector_AutoParagraph, HTMLPurifier_Injector_SafeObject, HTMLPurifier_Injector_RemoveEmpty, and HTMLPurifier_Injector_DisplayLinkURI.

Definition at line 220 of file Injector.php.

{}

HTMLPurifier_Injector::handleEnd ( & $token )

Handler that is called when an end token is processed.

Reimplemented in HTMLPurifier_Injector_SafeObject, and HTMLPurifier_Injector_DisplayLinkURI.

Definition at line 225 of file Injector.php.

References notifyEnd().

                                       {
        $this->notifyEnd($token);
    }

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HTMLPurifier_Injector::handleText ( & $token )

Handler that is called when a text token is processed.

Reimplemented in HTMLPurifier_Injector_AutoParagraph, HTMLPurifier_Injector_PurifierLinkify, and HTMLPurifier_Injector_Linkify.

Definition at line 215 of file Injector.php.

{}

HTMLPurifier_Injector::notifyEnd ( $token )

Notifier that is called when an end token is processed.

Note: This differs from handlers in that the token is read-only

Deprecated:

Definition at line 234 of file Injector.php.

Referenced by handleEnd().

{}

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HTMLPurifier_Injector::prepare	(	$config,
		$context
	)

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()).

Parameters

$config	Instance of HTMLPurifier_Config
$context	Instance of HTMLPurifier_Context

Returns: Boolean false if success, string of missing needed element/attribute if failure

Reimplemented in HTMLPurifier_Injector_SafeObject, HTMLPurifier_Injector_PurifierLinkify, and HTMLPurifier_Injector_RemoveEmpty.

Definition at line 90 of file Injector.php.

References $config, and checkNeeded().

                                               {
        $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->inputTokens    =& $context->get('InputTokens');
        $this->inputIndex     =& $context->get('InputIndex');
        return false;
    }

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HTMLPurifier_Injector::rewind ( $index )

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.

Warning: HTML Purifier will prevent you from fast-forwarding with this function.

Definition at line 68 of file Injector.php.

Referenced by getRewind(), and HTMLPurifier_Injector_RemoveEmpty\handleElement().

                                   {
        $this->rewind = $index;
    }

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Field Documentation

HTMLPurifier_Injector::$currentNesting

protected

Reference to CurrentNesting variable in Context.

This is an array list of tokens that we are currently "inside"

Definition at line 33 of file Injector.php.

HTMLPurifier_Injector::$htmlDefinition

protected

Instance of HTMLPurifier_HTMLDefinition.

Definition at line 27 of file Injector.php.

HTMLPurifier_Injector::$inputIndex

protected

Reference to InputIndex variable in Context.

This is an integer array index for $this->inputTokens that indicates what token is currently being processed.

Definition at line 46 of file Injector.php.

Referenced by current().

HTMLPurifier_Injector::$inputTokens

protected

Reference to InputTokens variable in Context.

This is an array list of the input tokens that are being processed.

Definition at line 39 of file Injector.php.

HTMLPurifier_Injector::$name

Advisory name of injector, this is for friendly error messages.

Definition at line 22 of file Injector.php.

Referenced by allowsElement(), and checkNeeded().

HTMLPurifier_Injector::$needed = array()

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')

Definition at line 53 of file Injector.php.

HTMLPurifier_Injector::$rewind = false

protected

Index of inputTokens to rewind to.

Definition at line 58 of file Injector.php.

Referenced by getRewind().

The documentation for this class was generated from the following file:

Services/Html/HtmlPurifier/library/HTMLPurifier/Injector.php

Public Member Functions

Data Fields

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation

Field Documentation