9 files changed, 800 insertions, 0 deletions
diff --git a/vendor/oojs/oojs-ui/php/mixins/AccessKeyedElement.php b/vendor/oojs/oojs-ui/php/mixins/AccessKeyedElement.php
new file mode 100644
index 00000000..eb4b79ea
--- /dev/null
+++ b/vendor/oojs/oojs-ui/php/mixins/AccessKeyedElement.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace OOUI;
+
+/**
+ * Element with an accesskey.
+ *
+ * Accesskeys allow an user to go to a specific element by using
+ * a shortcut combination of a browser specific keys + the key
+ * set to the field.
+ *
+ * @abstract
+ */
+class AccessKeyedElement extends ElementMixin {
+	/**
+	 * Accesskey
+	 *
+	 * @var string
+	 */
+	protected $accessKey = null;
+
+	public static $targetPropertyName = 'accessKeyed';
+
+	/**
+	 * @param Element $element Element being mixed into
+	 * @param array $config Configuration options
+	 * @param string $config['accessKey'] AccessKey. If not provided, no accesskey will be added
+	 */
+	public function __construct( Element $element, array $config = array() ) {
+		// Parent constructor
+		$target = isset( $config['accessKeyed'] ) ? $config['accessKeyed'] : $element;
+		parent::__construct( $element, $target, $config );
+
+		// Initialization
+		$this->setAccessKey(
+			isset( $config['accessKey'] ) ? $config['accessKey'] : null
+		);
+	}
+
+	/**
+	 * Set access key.
+	 *
+	 * @param string $accessKey Tag's access key, use empty string to remove
+	 * @chainable
+	 */
+	public function setAccessKey( $accessKey ) {
+		$accessKey = is_string( $accessKey ) && strlen( $accessKey ) ? $accessKey : null;
+
+		if ( $this->accessKey !== $accessKey ) {
+			if ( $accessKey !== null ) {
+				$this->target->setAttributes( array( 'accesskey' => $accessKey ) );
+			} else {
+				$this->target->removeAttributes( array( 'accesskey' ) );
+			}
+			$this->accessKey = $accessKey;
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Get AccessKey.
+	 *
+	 * @return string Accesskey string
+	 */
+	public function getAccessKey() {
+		return $this->accessKey;
+	}
+
+	public function getConfig( &$config ) {
+		if ( $this->accessKey !== null ) {
+			$config['accessKey'] = $this->accessKey;
+		}
+		return parent::getConfig( $config );
+	}
+}
diff --git a/vendor/oojs/oojs-ui/php/mixins/ButtonElement.php b/vendor/oojs/oojs-ui/php/mixins/ButtonElement.php
new file mode 100644
index 00000000..b09c7941
--- /dev/null
+++ b/vendor/oojs/oojs-ui/php/mixins/ButtonElement.php
@@ -0,0 +1,69 @@
+<?php
+
+namespace OOUI;
+
+/**
+ * Element with a button.
+ *
+ * Buttons are used for controls which can be clicked. They can be configured to use tab indexing
+ * and access keys for accessibility purposes.
+ *
+ * @abstract
+ */
+class ButtonElement extends ElementMixin {
+	/**
+	 * Button is framed.
+	 *
+	 * @var boolean
+	 */
+	protected $framed = false;
+
+	public static $targetPropertyName = 'button';
+
+	/**
+	 * @param Element $element Element being mixed into
+	 * @param array $config Configuration options
+	 * @param boolean $config['framed'] Render button with a frame (default: true)
+	 */
+	public function __construct( Element $element, array $config = array() ) {
+		// Parent constructor
+		$target = isset( $config['button'] ) ? $config['button'] : new Tag( 'a' );
+		parent::__construct( $element, $target, $config );
+
+		// Initialization
+		$this->element->addClasses( array( 'oo-ui-buttonElement' ) );
+		$this->target->addClasses( array( 'oo-ui-buttonElement-button' ) );
+		$this->toggleFramed( isset( $config['framed'] ) ? $config['framed'] : true );
+		$this->target->setAttributes( array(
+			'role' => 'button',
+		) );
+	}
+
+	/**
+	 * Toggle frame.
+	 *
+	 * @param boolean $framed Make button framed, omit to toggle
+	 * @chainable
+	 */
+	public function toggleFramed( $framed = null ) {
+		$this->framed = $framed !== null ? !!$framed : !$this->framed;
+		$this->element->toggleClasses( array( 'oo-ui-buttonElement-framed' ), $this->framed );
+		$this->element->toggleClasses( array( 'oo-ui-buttonElement-frameless' ), !$this->framed );
+	}
+
+	/**
+	 * Check if button has a frame.
+	 *
+	 * @return boolean Button is framed
+	 */
+	public function isFramed() {
+		return $this->framed;
+	}
+
+	public function getConfig( &$config ) {
+		if ( $this->framed !== true ) {
+			$config['framed'] = $this->framed;
+		}
+		return parent::getConfig( $config );
+	}
+}
diff --git a/vendor/oojs/oojs-ui/php/mixins/FlaggedElement.php b/vendor/oojs/oojs-ui/php/mixins/FlaggedElement.php
new file mode 100644
index 00000000..bd5dc80d
--- /dev/null
+++ b/vendor/oojs/oojs-ui/php/mixins/FlaggedElement.php
@@ -0,0 +1,133 @@
+<?php
+
+namespace OOUI;
+
+/**
+ * Element with named flags that can be added, removed, listed and checked.
+ *
+ * A flag, when set, adds a CSS class on the `$element` by combining `oo-ui-flaggedElement-` with
+ * the flag name. Flags are primarily useful for styling.
+ *
+ * @abstract
+ */
+class FlaggedElement extends ElementMixin {
+	/**
+	 * Flags.
+	 *
+	 * @var string
+	 */
+	protected $flags = array();
+
+	public static $targetPropertyName = 'flagged';
+
+	/**
+	 * @param Element $element Element being mixed into
+	 * @param array $config Configuration options
+	 * @param string|string[] $config['flags'] Flags describing importance and functionality, e.g.
+	 *   'primary', 'safe', 'progressive', 'destructive' or 'constructive'
+	 */
+	public function __construct( Element $element, array $config = array() ) {
+		// Parent constructor
+		$target = isset( $config['flagged'] ) ? $config['flagged'] : $element;
+		parent::__construct( $element, $target, $config );
+
+		// Initialization
+		$this->setFlags( isset( $config['flags'] ) ? $config['flags'] : null );
+	}
+
+	/**
+	 * Check if a flag is set.
+	 *
+	 * @param string $flag Name of flag
+	 * @return boolean Has flag
+	 */
+	public function hasFlag( $flag ) {
+		return isset( $this->flags[$flag] );
+	}
+
+	/**
+	 * Get the names of all flags set.
+	 *
+	 * @return string[] Flag names
+	 */
+	public function getFlags() {
+		return array_keys( $this->flags );
+	}
+
+	/**
+	 * Clear all flags.
+	 *
+	 * @chainable
+	 */
+	public function clearFlags() {
+		$remove = array();
+		$classPrefix = 'oo-ui-flaggedElement-';
+
+		foreach ( $this->flags as $flag ) {
+			$remove[] = $classPrefix . $flag;
+		}
+
+		$this->target->removeClasses( $remove );
+		$this->flags = array();
+
+		return $this;
+	}
+
+	/**
+	 * Add one or more flags.
+	 *
+	 * @param string|array $flags One or more flags to add, or an array keyed by flag name
+	 *   containing boolean set/remove instructions.
+	 * @chainable
+	 */
+	public function setFlags( $flags ) {
+		$add = array();
+		$remove = array();
+		$classPrefix = 'oo-ui-flaggedElement-';
+
+		if ( is_string( $flags ) ) {
+			// Set
+			if ( !isset( $this->flags[$flags] ) ) {
+				$this->flags[$flags] = true;
+				$add[] = $classPrefix . $flags;
+			}
+		} elseif ( is_array( $flags ) ) {
+			foreach ( $flags as $key => $value ) {
+				if ( is_numeric( $key ) ) {
+					// Set
+					if ( !isset( $this->flags[$value] ) ) {
+						$this->flags[$value] = true;
+						$add[] = $classPrefix . $value;
+					}
+				} else {
+					if ( $value ) {
+						// Set
+						if ( !isset( $this->flags[$key] ) ) {
+							$this->flags[$key] = true;
+							$add[] = $classPrefix . $key;
+						}
+					} else {
+						// Remove
+						if ( isset( $this->flags[$key] ) ) {
+							unset( $this->flags[$key] );
+							$remove[] = $classPrefix . $key;
+						}
+					}
+				}
+			}
+		}
+
+		$this->target
+			->addClasses( $add )
+			->removeClasses( $remove );
+
+		return $this;
+	}
+
+	public function getConfig( &$config ) {
+		if ( !empty( $this->flags ) ) {
+			$config['flags'] = $this->getFlags();
+		}
+		return parent::getConfig( $config );
+	}
+}
diff --git a/vendor/oojs/oojs-ui/php/mixins/GroupElement.php b/vendor/oojs/oojs-ui/php/mixins/GroupElement.php
new file mode 100644
index 00000000..93d3c7a1
--- /dev/null
+++ b/vendor/oojs/oojs-ui/php/mixins/GroupElement.php
@@ -0,0 +1,129 @@
+<?php
+
+namespace OOUI;
+
+/**
+ * Element containing a sequence of child elements.
+ *
+ * @abstract
+ */
+class GroupElement extends ElementMixin {
+	/**
+	 * List of items in the group.
+	 *
+	 * @var Element[]
+	 */
+	protected $items = array();
+
+	public static $targetPropertyName = 'group';
+
+	/**
+	 * @param Element $element Element being mixed into
+	 * @param array $config Configuration options
+	 */
+	public function __construct( Element $element, array $config = array() ) {
+		// Parent constructor
+		$target = isset( $config['group'] ) ? $config['group'] : new Tag( 'div' );
+		parent::__construct( $element, $target, $config );
+	}
+
+	/**
+	 * Check if there are no items.
+	 *
+	 * @return boolean Group is empty
+	 */
+	public function isEmpty() {
+		return !count( $this->items );
+	}
+
+	/**
+	 * Get items.
+	 *
+	 * @return Element[] Items
+	 */
+	public function getItems() {
+		return $this->items;
+	}
+
+	/**
+	 * Add items.
+	 *
+	 * Adding an existing item will move it.
+	 *
+	 * @param Element[] $items Items
+	 * @param number $index Index to insert items at
+	 * @chainable
+	 */
+	public function addItems( array $items, $index = null ) {
+		foreach ( $items as $item ) {
+			// Check if item exists then remove it first, effectively "moving" it
+			$currentIndex = array_search( $item, $this->items );
+			if ( $currentIndex !== false ) {
+				$this->removeItems( array( $item ) );
+				// Adjust index to compensate for removal
+				if ( $currentIndex < $index ) {
+					$index--;
+				}
+			}
+			// Add the item
+			$item->setElementGroup( $this );
+		}
+
+		if ( $index === null || $index < 0 || $index >= count( $this->items ) ) {
+			$this->items = array_merge( $this->items, $items );
+		} else {
+			array_splice( $this->items, $index, 0, $items );
+		}
+
+		// Update actual target element contents to reflect our list
+		$this->target->clearContent();
+		call_user_func_array( array( $this->target, 'appendContent' ), $this->items );
+
+		return $this;
+	}
+
+	/**
+	 * Remove items.
+	 *
+	 * @param Element[] $items Items to remove
+	 * @chainable
+	 */
+	public function removeItems( $items ) {
+		foreach ( $items as $item ) {
+			$index = array_search( $item, $this->items );
+			if ( $index !== false ) {
+				$item->setElementGroup( null );
+				array_splice( $this->items, $index, 1 );
+			}
+		}
+
+		// Update actual target element contents to reflect our list
+		$this->target->clearContent();
+		call_user_func_array( array( $this->target, 'appendContent' ), $this->items );
+
+		return $this;
+	}
+
+	/**
+	 * Clear all items.
+	 *
+	 * Items will be detached, not removed, so they can be used later.
+	 *
+	 * @chainable
+	 */
+	public function clearItems() {
+		foreach ( $this->items as $item ) {
+			$item->setElementGroup( null );
+		}
+
+		$this->items = array();
+		$this->target->clearContent();
+
+		return $this;
+	}
+
+	public function getConfig( &$config ) {
+		$config['items'] = $this->items;
+		return parent::getConfig( $config );
+	}
+}
diff --git a/vendor/oojs/oojs-ui/php/mixins/IconElement.php b/vendor/oojs/oojs-ui/php/mixins/IconElement.php
new file mode 100644
index 00000000..b6d27376
--- /dev/null
+++ b/vendor/oojs/oojs-ui/php/mixins/IconElement.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace OOUI;
+
+/**
+ * Element containing an icon.
+ *
+ * Icons are graphics, about the size of normal text. They can be used to aid the user in locating
+ * a control or convey information in a more space efficient way. Icons should rarely be used
+ * without labels; such as in a toolbar where space is at a premium or within a context where the
+ * meaning is very clear to the user.
+ *
+ * @abstract
+ */
+class IconElement extends ElementMixin {
+	/**
+	 * Symbolic icon name.
+	 *
+	 * @var string
+	 */
+	protected $icon = null;
+
+	public static $targetPropertyName = 'icon';
+
+	/**
+	 * @param Element $element Element being mixed into
+	 * @param array $config Configuration options
+	 * @param string $config['icon'] Symbolic icon name
+	 */
+	public function __construct( Element $element, array $config = array() ) {
+		// Parent constructor
+		// FIXME 'iconElement' is a very stupid way to call '$icon'
+		$target = isset( $config['iconElement'] ) ? $config['iconElement'] : new Tag( 'span' );
+		parent::__construct( $element, $target, $config );
+
+		// Initialization
+		$this->target->addClasses( array( 'oo-ui-iconElement-icon' ) );
+		$this->setIcon( isset( $config['icon'] ) ? $config['icon'] : null );
+	}
+
+	/**
+	 * Set icon name.
+	 *
+	 * @param string|null $icon Symbolic icon name
+	 * @chainable
+	 */
+	public function setIcon( $icon = null ) {
+		if ( $this->icon !== null ) {
+			$this->target->removeClasses( array( 'oo-ui-icon-' . $this->icon ) );
+		}
+		if ( $icon !== null ) {
+			$this->target->addClasses( array( 'oo-ui-icon-' . $icon ) );
+		}
+
+		$this->icon = $icon;
+		$this->element->toggleClasses( array( 'oo-ui-iconElement' ), (bool)$this->icon );
+
+		return $this;
+	}
+
+	/**
+	 * Get icon name.
+	 *
+	 * @return string Icon name
+	 */
+	public function getIcon() {
+		return $this->icon;
+	}
+
+	public function getConfig( &$config ) {
+		if ( $this->icon !== null ) {
+			$config['icon'] = $this->icon;
+		}
+		return parent::getConfig( $config );
+	}
+}
diff --git a/vendor/oojs/oojs-ui/php/mixins/IndicatorElement.php b/vendor/oojs/oojs-ui/php/mixins/IndicatorElement.php
new file mode 100644
index 00000000..56238b6c
--- /dev/null
+++ b/vendor/oojs/oojs-ui/php/mixins/IndicatorElement.php
@@ -0,0 +1,78 @@
+<?php
+
+namespace OOUI;
+
+/**
+ * Element containing an indicator.
+ *
+ * Indicators are graphics, smaller than normal text. They can be used to describe unique status or
+ * behavior. Indicators should only be used in exceptional cases; such as a button that opens a menu
+ * instead of performing an action directly, or an item in a list which has errors that need to be
+ * resolved.
+ *
+ * @abstract
+ */
+class IndicatorElement extends ElementMixin {
+	/**
+	 * Symbolic indicator name
+	 *
+	 * @var string|null
+	 */
+	protected $indicator = null;
+
+	public static $targetPropertyName = 'indicator';
+
+	/**
+	 * @param Element $element Element being mixed into
+	 * @param array $config Configuration options
+	 * @param string $config['indicator'] Symbolic indicator name
+	 */
+	public function __construct( Element $element, array $config = array() ) {
+		// Parent constructor
+		// FIXME 'indicatorElement' is a very stupid way to call '$indicator'
+		$target = isset( $config['indicatorElement'] )
+			? $config['indicatorElement']
+			: new Tag( 'span' );
+		parent::__construct( $element, $target, $config );
+
+		// Initialization
+		$this->target->addClasses( array( 'oo-ui-indicatorElement-indicator' ) );
+		$this->setIndicator( isset( $config['indicator'] ) ? $config['indicator'] : null );
+	}
+
+	/**
+	 * Set indicator name.
+	 *
+	 * @param string|null $indicator Symbolic name of indicator to use or null for no indicator
+	 * @chainable
+	 */
+	public function setIndicator( $indicator = null ) {
+		if ( $this->indicator !== null ) {
+			$this->target->removeClasses( array( 'oo-ui-indicator-' . $this->indicator ) );
+		}
+		if ( $indicator !== null ) {
+			$this->target->addClasses( array( 'oo-ui-indicator-' . $indicator ) );
+		}
+
+		$this->indicator = $indicator;
+		$this->element->toggleClasses( array( 'oo-ui-indicatorElement' ), (bool)$this->indicator );
+
+		return $this;
+	}
+
+	/**
+	 * Get indicator name.
+	 *
+	 * @return string Symbolic name of indicator
+	 */
+	public function getIndicator() {
+		return $this->indicator;
+	}
+
+	public function getConfig( &$config ) {
+		if ( $this->indicator !== null ) {
+			$config['indicator'] = $this->indicator;
+		}
+		return parent::getConfig( $config );
+	}
+}
diff --git a/vendor/oojs/oojs-ui/php/mixins/LabelElement.php b/vendor/oojs/oojs-ui/php/mixins/LabelElement.php
new file mode 100644
index 00000000..d5cf7bee
--- /dev/null
+++ b/vendor/oojs/oojs-ui/php/mixins/LabelElement.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace OOUI;
+
+/**
+ * Element containing a label.
+ *
+ * @abstract
+ */
+class LabelElement extends ElementMixin {
+	/**
+	 * Label value.
+	 *
+	 * @var string|HtmlSnippet|null
+	 */
+	protected $label = null;
+
+	public static $targetPropertyName = 'label';
+
+	/**
+	 * @param Element $element Element being mixed into
+	 * @param array $config Configuration options
+	 * @param string|HtmlSnippet $config['label'] Label text
+	 */
+	public function __construct( Element $element, array $config = array() ) {
+		// Parent constructor
+		// FIXME 'labelElement' is a very stupid way to call '$label'
+		$target = isset( $config['labelElement'] ) ? $config['labelElement'] : new Tag( 'span' );
+		parent::__construct( $element, $target, $config );
+
+		// Initialization
+		$this->target->addClasses( array( 'oo-ui-labelElement-label' ) );
+		$this->setLabel( isset( $config['label'] ) ? $config['label'] : null );
+	}
+
+	/**
+	 * Set the label.
+	 *
+	 * An empty string will result in the label being hidden. A string containing only whitespace will
+	 * be converted to a single `&nbsp;`.
+	 *
+	 * @param string|HtmlSnippet|null $label Label text
+	 * @chainable
+	 */
+	public function setLabel( $label ) {
+		$this->label = $label;
+
+		$this->target->clearContent();
+		if ( $this->label !== null ) {
+			if ( is_string( $this->label ) && $this->label !== '' && trim( $this->label ) === '' ) {
+				$this->target->appendContent( new HtmlSnippet( '&nbsp;' ) );
+			} else {
+				$this->target->appendContent( $label );
+			}
+		}
+
+		$this->element->toggleClasses( array( 'oo-ui-labelElement' ), !!$this->label );
+
+		return $this;
+	}
+
+	/**
+	 * Get the label.
+	 *
+	 * @return string|HtmlSnippet|null Label text
+	 */
+	public function getLabel() {
+		return $this->label;
+	}
+
+	public function getConfig( &$config ) {
+		if ( $this->label !== null ) {
+			$config['label'] = $this->label;
+		}
+		return parent::getConfig( $config );
+	}
+}
diff --git a/vendor/oojs/oojs-ui/php/mixins/TabIndexedElement.php b/vendor/oojs/oojs-ui/php/mixins/TabIndexedElement.php
new file mode 100644
index 00000000..223b5371
--- /dev/null
+++ b/vendor/oojs/oojs-ui/php/mixins/TabIndexedElement.php
@@ -0,0 +1,88 @@
+<?php
+
+namespace OOUI;
+
+/**
+ * Element supporting "sequential focus navigation" using the 'tabindex' attribute.
+ *
+ * @abstract
+ */
+class TabIndexedElement extends ElementMixin {
+	/**
+	 * Tab index value.
+	 *
+	 * @var number|null
+	 */
+	protected $tabIndex = null;
+
+	public static $targetPropertyName = 'tabIndexed';
+
+	/**
+	 * @param Element $element Element being mixed into
+	 * @param array $config Configuration options
+	 * @param number|null $config['tabIndex'] Tab index value. Use 0 to use default ordering, use -1 to
+	 *   prevent tab focusing, use null to suppress the `tabindex` attribute. (default: 0)
+	 */
+	public function __construct( Element $element, array $config = array() ) {
+		// Parent constructor
+		$target = isset( $config['tabIndexed'] ) ? $config['tabIndexed'] : $element;
+		parent::__construct( $element, $target, $config );
+
+		// Initialization
+		$this->setTabIndex( isset( $config['tabIndex'] ) ? $config['tabIndex'] : 0 );
+	}
+
+	/**
+	 * Set tab index value.
+	 *
+	 * @param number|null $tabIndex Tab index value or null for no tab index
+	 * @chainable
+	 */
+	public function setTabIndex( $tabIndex ) {
+		$tabIndex = is_numeric( $tabIndex ) ? $tabIndex : null;
+
+		if ( $this->tabIndex !== $tabIndex ) {
+			$this->tabIndex = $tabIndex;
+			$this->updateTabIndex();
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Update the tabIndex attribute, in case of changes to tabIndex or disabled
+	 * state.
+	 *
+	 * @chainable
+	 */
+	public function updateTabIndex() {
+		$disabled = $this->element->isDisabled();
+		if ( $this->tabIndex !== null ) {
+			$this->target->setAttributes( array(
+				// Do not index over disabled elements
+				'tabindex' => $disabled ? -1 : $this->tabIndex,
+				// ChromeVox and NVDA do not seem to inherit this from parent elements
+				'aria-disabled' => ( $disabled ? 'true' : 'false' )
+			) );
+		} else {
+			$this->target->removeAttributes( array( 'tabindex', 'aria-disabled' ) );
+		}
+		return $this;
+	}
+
+	/**
+	 * Get tab index value.
+	 *
+	 * @return number|null Tab index value
+	 */
+	public function getTabIndex() {
+		return $this->tabIndex;
+	}
+
+	public function getConfig( &$config ) {
+		if ( $this->tabIndex !== 0 ) {
+			$config['tabIndex'] = $this->tabIndex;
+		}
+		return parent::getConfig( $config );
+	}
+}
diff --git a/vendor/oojs/oojs-ui/php/mixins/TitledElement.php b/vendor/oojs/oojs-ui/php/mixins/TitledElement.php
new file mode 100644
index 00000000..5f1317c4
--- /dev/null
+++ b/vendor/oojs/oojs-ui/php/mixins/TitledElement.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace OOUI;
+
+/**
+ * Element with a title.
+ *
+ * Titles are rendered by the browser and are made visible when hovering the element. Titles are
+ * not visible on touch devices.
+ *
+ * @abstract
+ */
+class TitledElement extends ElementMixin {
+	/**
+	 * Title text.
+	 *
+	 * @var string
+	 */
+	protected $title = null;
+
+	public static $targetPropertyName = 'titled';
+
+	/**
+	 * @param Element $element Element being mixed into
+	 * @param array $config Configuration options
+	 * @param string $config['title'] Title. If not provided, the static property 'title' is used.
+	 */
+	public function __construct( Element $element, array $config = array() ) {
+		// Parent constructor
+		$target = isset( $config['titled'] ) ? $config['titled'] : $element;
+		parent::__construct( $element, $target, $config );
+
+		// Initialization
+		$this->setTitle(
+			isset( $config['title'] ) ? $config['title'] :
+			( isset( $element::$title ) ? $element::$title : null )
+		);
+	}
+
+	/**
+	 * Set title.
+	 *
+	 * @param string|null $title Title text or null for no title
+	 * @chainable
+	 */
+	public function setTitle( $title ) {
+		if ( $this->title !== $title ) {
+			$this->title = $title;
+			if ( $title !== null ) {
+				$this->target->setAttributes( array( 'title' => $title ) );
+			} else {
+				$this->target->removeAttributes( array( 'title' ) );
+			}
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Get title.
+	 *
+	 * @return string Title string
+	 */
+	public function getTitle() {
+		return $this->title;
+	}
+
+	public function getConfig( &$config ) {
+		if ( $this->title !== null ) {
+			$config['title'] = $this->title;
+		}
+		return parent::getConfig( $config );
+	}
+}