The "stack of open elements" as defined in the HTML5 tree builder spec. More...

Inheritance diagram for MediaWiki\Tidy\BalanceStack:

Collaboration diagram for MediaWiki\Tidy\BalanceStack:

Public Member Functions
	__construct (array $config)
	Create a new BalanceStack with a single BalanceElement on it, representing the root <html> node.

	__toString ()
	Return the contents of the open elements stack as a string for debugging.

	adjustedCurrentNode ( $fragmentContext)
	Return the adjusted current node.

	adoptionAgency ( $tag, $afe)
	Run the "adoption agency algoritm" (AAA) for the given subject tag name.

	clearToContext ( $set)
	Pop elements off the stack not including the first element in the specified set.

	generateImpliedEndTags ( $butnot=null, $thorough=false)
	Generate implied end tags.

	getIterator ()
	Return an iterator over this stack which visits the current node first, and the root node last.

	getOutput ()
	Return a string representing the output of the tree builder: all the children of the root <html> node.

	inButtonScope ( $tag)
	Determine if the stack has $tag in button scope.

	indexOf ( $tag)
	Return the position of the given BalanceElement, set, or HTML tag name string in the BalanceStack.

	inListItemScope ( $tag)
	Determine if the stack has $tag in list item scope.

	inScope ( $tag)
	Determine if the stack has $tag in scope.

	inSelectScope ( $tag)
	Determine if the stack has $tag in select scope.

	insertAfter (BalanceElement $a, BalanceElement $b)
	Find $a in the BalanceStack and insert $b after it.

	insertComment ( $value)
	Insert a comment at the appropriate place for inserting a node.

	insertElement (BalanceElement $elt)
	Insert an element at the appropriate place and push it on to the open elements stack.

	insertForeignElement ( $namespaceURI, $tag, $attribs)
	Insert a BalanceElement at the appropriate place, pushing it on to the open elements stack.

	insertHTMLElement ( $tag, $attribs)
	Insert an HTML element at the appropriate place, pushing it on to the open elements stack.

	insertText ( $value, $isComment=false)
	Insert text at the appropriate place for inserting a node.

	inSpecificScope ( $tag, $set)
	Determine if the stack has $tag in a specific scope, $set.

	inTableScope ( $tag)
	Determine if the stack has $tag in table scope.

	length ()
	Return the number of elements currently in the BalanceStack.

	node ( $idx)
	Return the BalanceElement at the given position $idx, where position 0 represents the root element.

	pop ()
	Remove the current node from the BalanceStack, flattening it in the process.

	popTag ( $tag)
	Pop elements off the stack up to and including the first element with the specified HTML tagname (or matching the given set).

	popTo ( $idx)
	Remove all nodes up to and including position $idx from the BalanceStack, flattening them in the process.

	removeElement (BalanceElement $elt, $flatten=true)
	Remove the given $elt from the BalanceStack, optionally flattening it in the process.

	replaceAt ( $idx, BalanceElement $elt)
	Replace the element at position $idx in the BalanceStack with $elt.

Public Attributes
	$currentNode
	Reference to the current element.

	$fosterParentMode = false
	Foster parent mode determines how nodes are inserted into the stack.

Private Member Functions
	fosterParent ( $elt)
	Foster parent the given $elt in the stack of open elements.

Private Attributes
	$config
	Configuration options governing flattening.

	$elements = []
	Backing storage for the stack.

Detailed Description

The "stack of open elements" as defined in the HTML5 tree builder spec.

This contains methods to ensure that content (start tags, text) are inserted at the correct place in the output string, and to flatten BalanceElements are they are closed to avoid holding onto a complete DOM tree for the document in memory.

The stack defines a PHP iterator to traverse it in "reverse order", that is, the most-recently-added element is visited first in a foreach loop.

Since: 1.27

See also: https://html.spec.whatwg.org/multipage/syntax.html#the-stack-of-open-elements

Definition at line 661 of file Balancer.php.

Constructor & Destructor Documentation

◆ __construct()

MediaWiki\Tidy\BalanceStack::__construct ( array $config )

Create a new BalanceStack with a single BalanceElement on it, representing the root <html> node.

Parameters

array $config Balancer configuration; see Balancer::_construct().

Definition at line 690 of file Balancer.php.

References MediaWiki\Tidy\BalanceStack\$config, and MediaWiki\Tidy\BalanceSets\HTML_NAMESPACE.

Member Function Documentation

◆ __toString()

MediaWiki\Tidy\BalanceStack::__toString ( )

Return the contents of the open elements stack as a string for debugging.

Returns: string

Definition at line 1367 of file Balancer.php.

References as.

◆ adjustedCurrentNode()

MediaWiki\Tidy\BalanceStack::adjustedCurrentNode ( $fragmentContext )

Return the adjusted current node.

Parameters

string $fragmentContext

Returns: string

Definition at line 914 of file Balancer.php.

References MediaWiki\Tidy\BalanceStack\$currentNode.

◆ adoptionAgency()

MediaWiki\Tidy\BalanceStack::adoptionAgency	(	$tag,
		$afe
	)

Run the "adoption agency algoritm" (AAA) for the given subject tag name.

Parameters

string	$tag	The subject tag name.
BalanceActiveFormattingElements	$afe	The current active formatting elements list.

Returns: true if the adoption agency algorithm "did something", false if more processing is required by the caller.

See also: https://html.spec.whatwg.org/multipage/syntax.html#adoption-agency-algorithm

Definition at line 1162 of file Balancer.php.

◆ clearToContext()

MediaWiki\Tidy\BalanceStack::clearToContext ( $set )

Pop elements off the stack not including the first element in the specified set.

Parameters

BalanceElement | array | string $set

Definition at line 1029 of file Balancer.php.

References MediaWiki\Tidy\BalanceStack\pop().

◆ fosterParent()

MediaWiki\Tidy\BalanceStack::fosterParent ( $elt )

private

Foster parent the given $elt in the stack of open elements.

Parameters

BalanceElement | string $elt

Returns: BalanceElement|string

See also: https://html.spec.whatwg.org/multipage/syntax.html#foster-parent

Definition at line 1100 of file Balancer.php.

References MediaWiki\Tidy\BalanceSets\$tidyPWrapSet, MediaWiki\Tidy\BalanceStack\indexOf(), MediaWiki\Tidy\BalanceStack\insertHTMLElement(), MediaWiki\Tidy\BalanceStack\insertText(), and MediaWiki\Tidy\BalanceElement\isHtmlNamed().

Referenced by MediaWiki\Tidy\BalanceStack\adoptionAgency(), MediaWiki\Tidy\BalanceStack\insertElement(), and MediaWiki\Tidy\BalanceStack\insertText().

◆ generateImpliedEndTags()

MediaWiki\Tidy\BalanceStack::generateImpliedEndTags	(	$butnot = `null`,
		$thorough = `false`
	)

Generate implied end tags.

Parameters

string	$butnot
bool	$thorough	True if we should generate end tags thoroughly.

See also: https://html.spec.whatwg.org/multipage/syntax.html#generate-implied-end-tags

Definition at line 894 of file Balancer.php.

References MediaWiki\Tidy\BalanceSets\$impliedEndTagsSet, MediaWiki\Tidy\BalanceSets\$thoroughImpliedEndTagsSet, and MediaWiki\Tidy\BalanceStack\pop().

◆ getIterator()

MediaWiki\Tidy\BalanceStack::getIterator ( )

Return an iterator over this stack which visits the current node first, and the root node last.

Returns: \Iterator

Definition at line 924 of file Balancer.php.

◆ getOutput()

MediaWiki\Tidy\BalanceStack::getOutput ( )

Return a string representing the output of the tree builder: all the children of the root <html> node.

Returns: string

Definition at line 705 of file Balancer.php.

References $out, and as.

◆ inButtonScope()

MediaWiki\Tidy\BalanceStack::inButtonScope ( $tag )

Determine if the stack has $tag in button scope.

Parameters

BalanceElement | array | string $tag

Returns: bool

See also: https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-button-scope

Definition at line 825 of file Balancer.php.

References MediaWiki\Tidy\BalanceSets\inButtonScopeSet(), and MediaWiki\Tidy\BalanceStack\inSpecificScope().

◆ indexOf()

MediaWiki\Tidy\BalanceStack::indexOf ( $tag )

Return the position of the given BalanceElement, set, or HTML tag name string in the BalanceStack.

Parameters

BalanceElement | array | string $tag

Returns: int

Definition at line 964 of file Balancer.php.

Referenced by MediaWiki\Tidy\BalanceStack\adoptionAgency(), MediaWiki\Tidy\BalanceStack\fosterParent(), and MediaWiki\Tidy\BalanceStack\insertAfter().

◆ inListItemScope()

MediaWiki\Tidy\BalanceStack::inListItemScope ( $tag )

Determine if the stack has $tag in list item scope.

Parameters

BalanceElement | array | string $tag

Returns: bool

See also: https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-list-item-scope

Definition at line 835 of file Balancer.php.

References MediaWiki\Tidy\BalanceSets\inListItemScopeSet(), and MediaWiki\Tidy\BalanceStack\inSpecificScope().

◆ inScope()

MediaWiki\Tidy\BalanceStack::inScope ( $tag )

Determine if the stack has $tag in scope.

Parameters

BalanceElement | array | string $tag

Returns: bool

See also: https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-scope

Definition at line 815 of file Balancer.php.

References MediaWiki\Tidy\BalanceSets\$inScopeSet, and MediaWiki\Tidy\BalanceStack\inSpecificScope().

Referenced by MediaWiki\Tidy\BalanceStack\adoptionAgency().

◆ inSelectScope()

MediaWiki\Tidy\BalanceStack::inSelectScope ( $tag )

Determine if the stack has $tag in select scope.

Parameters

BalanceElement | array | string $tag

Returns: bool

See also: https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-select-scope

Definition at line 855 of file Balancer.php.

References MediaWiki\Tidy\BalanceSets\$inInvertedSelectScopeSet, and as.

◆ insertAfter()

MediaWiki\Tidy\BalanceStack::insertAfter	(	BalanceElement	$a,
		BalanceElement	$b
	)

Find $a in the BalanceStack and insert $b after it.

Parameters

BalanceElement	$a
BalanceElement	$b

Definition at line 1080 of file Balancer.php.

References MediaWiki\Tidy\BalanceStack\indexOf().

Referenced by MediaWiki\Tidy\BalanceStack\adoptionAgency().

◆ insertComment()

MediaWiki\Tidy\BalanceStack::insertComment ( $value )

Insert a comment at the appropriate place for inserting a node.

Parameters

string $value Content of the comment.

Returns: string

See also: https://html.spec.whatwg.org/multipage/syntax.html#insert-a-comment

Definition at line 721 of file Balancer.php.

References $value, and MediaWiki\Tidy\BalanceStack\insertText().

◆ insertElement()

MediaWiki\Tidy\BalanceStack::insertElement ( BalanceElement $elt )

Insert an element at the appropriate place and push it on to the open elements stack.

Parameters

BalanceElement $elt

Returns: BalanceElement

See also: https://html.spec.whatwg.org/multipage/syntax.html#appropriate-place-for-inserting-a-node

Definition at line 786 of file Balancer.php.

References MediaWiki\Tidy\BalanceSets\$tableSectionRowSet, MediaWiki\Tidy\BalanceSets\$tidyInlineSet, MediaWiki\Tidy\BalanceStack\fosterParent(), MediaWiki\Tidy\BalanceElement\isA(), and MediaWiki\Tidy\BalanceStack\pop().

Referenced by MediaWiki\Tidy\BalanceStack\insertForeignElement().

◆ insertForeignElement()

MediaWiki\Tidy\BalanceStack::insertForeignElement	(	$namespaceURI,
		$tag,
		$attribs
	)

Insert a BalanceElement at the appropriate place, pushing it on to the open elements stack.

Parameters

string	$namespaceURI	The element namespace
string	$tag	The tag name
string	$attribs	Normalized attributes, as a string.

Returns: BalanceElement

See also: https://html.spec.whatwg.org/multipage/syntax.html#insert-a-foreign-element

Definition at line 759 of file Balancer.php.

References $attribs, and MediaWiki\Tidy\BalanceStack\insertElement().

Referenced by MediaWiki\Tidy\BalanceStack\insertHTMLElement().

◆ insertHTMLElement()

MediaWiki\Tidy\BalanceStack::insertHTMLElement	(	$tag,
		$attribs
	)

Insert an HTML element at the appropriate place, pushing it on to the open elements stack.

Parameters

string	$tag	The tag name
string	$attribs	Normalized attributes, as a string.

Returns: BalanceElement

See also: https://html.spec.whatwg.org/multipage/syntax.html#insert-an-html-element

Definition at line 773 of file Balancer.php.

References $attribs, MediaWiki\Tidy\BalanceSets\HTML_NAMESPACE, and MediaWiki\Tidy\BalanceStack\insertForeignElement().

Referenced by MediaWiki\Tidy\BalanceStack\fosterParent(), and MediaWiki\Tidy\BalanceStack\insertText().

◆ insertText()

MediaWiki\Tidy\BalanceStack::insertText	(	$value,
		$isComment = `false`
	)

Insert text at the appropriate place for inserting a node.

Parameters

string	$value
bool	$isComment

Returns: string

See also: https://html.spec.whatwg.org/multipage/syntax.html#appropriate-place-for-inserting-a-node

Definition at line 733 of file Balancer.php.

References MediaWiki\Tidy\BalanceSets\$tableSectionRowSet, MediaWiki\Tidy\BalanceSets\$tidyPWrapSet, $value, MediaWiki\Tidy\BalanceStack\fosterParent(), MediaWiki\Tidy\BalanceStack\insertHTMLElement(), and MediaWiki\Tidy\BalanceStack\insertText().

Referenced by MediaWiki\Tidy\BalanceStack\fosterParent(), MediaWiki\Tidy\BalanceStack\insertComment(), and MediaWiki\Tidy\BalanceStack\insertText().

◆ inSpecificScope()

MediaWiki\Tidy\BalanceStack::inSpecificScope	(	$tag,
		$set
	)

Determine if the stack has $tag in a specific scope, $set.

Parameters

BalanceElement \| array \| string	$tag
BalanceElement \| array \| string	$set

Returns: bool

See also: https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-the-specific-scope

Definition at line 876 of file Balancer.php.

References as.

Referenced by MediaWiki\Tidy\BalanceStack\inButtonScope(), MediaWiki\Tidy\BalanceStack\inListItemScope(), MediaWiki\Tidy\BalanceStack\inScope(), and MediaWiki\Tidy\BalanceStack\inTableScope().

◆ inTableScope()

MediaWiki\Tidy\BalanceStack::inTableScope ( $tag )

Determine if the stack has $tag in table scope.

Parameters

BalanceElement | array | string $tag

Returns: bool

See also: https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-table-scope

Definition at line 845 of file Balancer.php.

References MediaWiki\Tidy\BalanceSets\$inTableScopeSet, and MediaWiki\Tidy\BalanceStack\inSpecificScope().

◆ length()

MediaWiki\Tidy\BalanceStack::length ( )

Return the number of elements currently in the BalanceStack.

Returns: int

Definition at line 977 of file Balancer.php.

Referenced by MediaWiki\Tidy\BalanceStack\adoptionAgency().

◆ node()

MediaWiki\Tidy\BalanceStack::node ( $idx )

Return the BalanceElement at the given position $idx, where position 0 represents the root element.

Parameters

int $idx

Returns: BalanceElement

Definition at line 934 of file Balancer.php.

Referenced by MediaWiki\Tidy\BalanceStack\adoptionAgency().

◆ pop()

MediaWiki\Tidy\BalanceStack::pop ( )

Remove the current node from the BalanceStack, flattening it in the process.

Definition at line 985 of file Balancer.php.

Referenced by MediaWiki\Tidy\BalanceStack\adoptionAgency(), MediaWiki\Tidy\BalanceStack\clearToContext(), MediaWiki\Tidy\BalanceStack\generateImpliedEndTags(), MediaWiki\Tidy\BalanceStack\insertElement(), MediaWiki\Tidy\BalanceStack\popTag(), and MediaWiki\Tidy\BalanceStack\popTo().

◆ popTag()

MediaWiki\Tidy\BalanceStack::popTag ( $tag )

Pop elements off the stack up to and including the first element with the specified HTML tagname (or matching the given set).

Parameters

BalanceElement | array | string $tag

Definition at line 1014 of file Balancer.php.

References MediaWiki\Tidy\BalanceStack\pop().

Referenced by MediaWiki\Tidy\BalanceStack\adoptionAgency().

◆ popTo()

MediaWiki\Tidy\BalanceStack::popTo ( $idx )

Remove all nodes up to and including position $idx from the BalanceStack, flattening them in the process.

Parameters

int $idx

Definition at line 1002 of file Balancer.php.

References MediaWiki\Tidy\BalanceStack\pop().

◆ removeElement()

MediaWiki\Tidy\BalanceStack::removeElement	(	BalanceElement	$elt,
			$flatten = `true`
	)

Remove the given $elt from the BalanceStack, optionally flattening it in the process.

Parameters

BalanceElement	$elt	The element to remove.
bool	$flatten	Whether to flatten the removed element.

Definition at line 1045 of file Balancer.php.

References MediaWiki\Tidy\BalanceElement\flatten().

Referenced by MediaWiki\Tidy\BalanceStack\adoptionAgency().

◆ replaceAt()

MediaWiki\Tidy\BalanceStack::replaceAt	(		$idx,
		BalanceElement	$elt
	)

Replace the element at position $idx in the BalanceStack with $elt.

Parameters

int	$idx
BalanceElement	$elt

Definition at line 943 of file Balancer.php.

Referenced by MediaWiki\Tidy\BalanceStack\adoptionAgency().

Member Data Documentation

◆ $config

array MediaWiki\Tidy\BalanceStack::$config

private

Configuration options governing flattening.

See also: Balancer::__construct()

Definition at line 679 of file Balancer.php.

Referenced by MediaWiki\Tidy\BalanceStack\__construct().

◆ $currentNode

MediaWiki\Tidy\BalanceStack::$currentNode

Reference to the current element.

Definition at line 683 of file Balancer.php.

Referenced by MediaWiki\Tidy\BalanceStack\adjustedCurrentNode().

◆ $elements

BalanceElement[] MediaWiki\Tidy\BalanceStack::$elements = []

private

Backing storage for the stack.

Definition at line 666 of file Balancer.php.

◆ $fosterParentMode

bool MediaWiki\Tidy\BalanceStack::$fosterParentMode = false

Foster parent mode determines how nodes are inserted into the stack.

See also: https://html.spec.whatwg.org/multipage/syntax.html#foster-parent

Definition at line 673 of file Balancer.php.

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

includes/tidy/Balancer.php

Public Member Functions

Public Attributes

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

Member Function Documentation

◆ __toString()

◆ adjustedCurrentNode()

◆ adoptionAgency()

◆ clearToContext()

◆ fosterParent()

◆ generateImpliedEndTags()

◆ getIterator()

◆ getOutput()

◆ inButtonScope()

◆ indexOf()

◆ inListItemScope()

◆ inScope()

◆ inSelectScope()

◆ insertAfter()

◆ insertComment()

◆ insertElement()

◆ insertForeignElement()

◆ insertHTMLElement()

◆ insertText()

◆ inSpecificScope()

◆ inTableScope()

◆ length()

◆ node()

◆ pop()

◆ popTag()

◆ popTo()

◆ removeElement()

◆ replaceAt()

Member Data Documentation

◆ $config

◆ $currentNode

◆ $elements

◆ $fosterParentMode