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<?php |
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/** |
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* Sake |
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* |
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* @link http://github.com/sandrokeil/HtmlElement for the canonical source repository |
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* @copyright Copyright (c) 2014-2017 Sandro Keil |
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* @license http://github.com/sandrokeil/HtmlElement/blob/master/LICENSE.txt New BSD License |
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*/ |
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namespace Sake\HtmlElement\View\Helper; |
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use Zend\Escaper\Escaper; |
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use Zend\View\Helper\AbstractHelper; |
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/** |
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* HtmlElement view helper |
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* |
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* This view helper creates a html tag object which can be configured and rendered. |
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*/ |
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class HtmlElement extends AbstractHelper |
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{ |
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/** |
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* Tag type e.g. div |
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* |
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* @var string |
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*/ |
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protected $tag; |
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/** |
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* Tag content |
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* |
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* @var string |
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*/ |
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protected $text = ''; |
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/** |
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* Array of attribute / value pair |
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* |
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* @var array |
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*/ |
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protected $attributes = array(); |
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/** |
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* Escape html |
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* |
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* @var bool |
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*/ |
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protected $renderHtml = false; |
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/** |
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* List of self closing tags for valid html |
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* |
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* @var array |
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*/ |
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protected $singletonTags = array( |
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'area', |
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'base', |
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'br', |
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'col', |
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'command', |
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'embed', |
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'hr', |
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'img', |
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'input', |
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'keygen', |
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'link', |
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'meta', |
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'param', |
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'source', |
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'track', |
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'wbr', |
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); |
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/** |
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* Html/text escaper |
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* |
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* @var Escaper |
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*/ |
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protected $escaper; |
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/** |
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* Should be html attributes escaped |
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* |
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* @var bool |
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*/ |
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protected $escapeHtmlAttribute = true; |
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/** |
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* Should be text escaped |
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* |
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* @var bool |
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*/ |
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protected $escapeText = true; |
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/** |
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* Create html object with provided settings. |
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* |
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* @param string $tag Html tag |
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* @param string $text Html content |
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* @param array $attributes Html attributes |
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* @param bool $renderHtml Escape html |
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* @return HtmlElement |
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*/ |
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public function __invoke($tag, $text = '', array $attributes = array(), $renderHtml = false) |
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{ |
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$html = clone $this; |
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$html->setTag($tag); |
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$html->setText($text); |
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$html->setAttributes($attributes); |
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$html->enableHtml($renderHtml); |
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return $html; |
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} |
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/** |
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* Renders element. Triggers an error instead of throw an exception, because it is not allowed here. |
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* |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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try { |
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$html = $this->render(); |
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} catch (\Exception $exception) { |
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trigger_error($exception, E_USER_WARNING); |
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$html = ''; |
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} |
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return $html; |
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} |
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/** |
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* Alias for __toString |
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* |
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* @return string |
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*/ |
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public function toString() |
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{ |
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return $this->__toString(); |
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} |
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/** |
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* Returns tag |
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* |
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* @return string |
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*/ |
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public function getTag() |
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{ |
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return $this->tag; |
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} |
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/** |
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* Returns the current text (content) of tag |
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* |
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* @return string |
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*/ |
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public function getText() |
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{ |
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return $this->text; |
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} |
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/** |
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* Returns an array of html attribute / value pair for the current html element |
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* |
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* @return array |
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*/ |
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public function getAttributes() |
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{ |
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return $this->attributes; |
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} |
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/** |
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* Sets an array of html attributes / value pair |
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* |
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* @param array $attributes Html attributes |
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* @return HtmlElement |
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*/ |
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public function setAttributes(array $attributes) |
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{ |
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$this->attributes = $attributes; |
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return $this; |
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} |
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/** |
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* Sets html tag |
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* |
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* @param string $tag |
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* @return HtmlElement |
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*/ |
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public function setTag($tag) |
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{ |
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$this->tag = (string) $tag; |
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return $this; |
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} |
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/** |
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* Sets tag text (content) |
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* |
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* @param string $text |
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* @return HtmlElement |
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*/ |
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public function setText($text) |
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{ |
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$this->text = (string) $text; |
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return $this; |
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} |
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/** |
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* Appends text |
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* @param string $text |
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* @return HtmlElement |
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*/ |
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public function appendText($text) |
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{ |
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$this->text .= (string) $text; |
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return $this; |
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} |
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/** |
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* Returns css classes |
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* |
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* @return string |
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*/ |
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public function getClass() |
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{ |
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return isset($this->attributes['class']) ? $this->attributes['class'] : ''; |
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} |
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/** |
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* Sets a css class for current element. This method overrides all existing css classes. To append css classes |
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* use appendClass() |
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* |
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* @param string $class Css class |
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* @return HtmlElement |
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*/ |
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public function setClass($class) |
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{ |
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$this->attributes['class'] = $class; |
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return $this; |
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} |
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/** |
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* Appends a css class to current element. |
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* |
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* @param string $class Css class |
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* @return HtmlElement |
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*/ |
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public function appendClass($class) |
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{ |
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if (!isset($this->attributes['class'])) { |
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$this->attributes['class'] = ''; |
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} else { |
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$this->attributes['class'] .= ' '; |
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} |
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$this->attributes['class'] .= (string) $class; |
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return $this; |
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} |
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/** |
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* Returns id attribute of current element |
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* |
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* @return string |
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*/ |
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public function getId() |
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{ |
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return isset($this->attributes['id']) ? $this->attributes['id'] : ''; |
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} |
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/** |
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* Sets id attribute for current element |
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* |
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* @param string $id Name |
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* @return HtmlElement |
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*/ |
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public function setId($id) |
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{ |
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$this->attributes['id'] = (string) $id; |
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return $this; |
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} |
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/** |
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* Return true or false to indicate escaping of text |
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* |
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* @return bool |
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*/ |
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public function useHtml() |
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{ |
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return $this->renderHtml; |
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} |
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/** |
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* Turn on / off html rendering text |
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* |
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* @param bool $renderHtml Render html or escape content |
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* @return HtmlElement |
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*/ |
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public function enableHtml($renderHtml) |
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{ |
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$this->renderHtml = (bool) $renderHtml; |
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return $this; |
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} |
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/** |
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* Builds html attributes |
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* |
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* @return string |
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*/ |
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protected function buildAttributes() |
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{ |
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$attributes = ''; |
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foreach ($this->attributes as $key => $value) { |
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$attributes .= ' ' . $key . '="' . $this->escapeHtmlAttribute($value) . '"'; |
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} |
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return $attributes; |
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} |
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/** |
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* Renders html element |
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* |
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* @return string |
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*/ |
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public function render() |
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{ |
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if (in_array($this->tag, $this->singletonTags)) { |
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// strict html 5 is omitted for backward compatibility, html 5 is still valid |
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return '<' . $this->tag . $this->buildAttributes() . ' />'; |
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} |
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if (false === $this->renderHtml) { |
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$text = $this->escapeText($this->text); |
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} else { |
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$text = $this->text; |
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} |
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return '<' . $this->tag . $this->buildAttributes() . '>' . $text . '</' . $this->tag . '>'; |
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} |
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/** |
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* Returns if html attributes should be escaped |
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* |
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* @return boolean |
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*/ |
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public function isEscapeHtmlAttribute() |
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{ |
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return $this->escapeHtmlAttribute; |
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} |
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/** |
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* Enable/disable escaping of html attributes |
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* |
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* @param boolean $escapeHtmlAttributes |
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* @return HtmlElement |
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*/ |
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public function setEscapeHtmlAttribute($escapeHtmlAttributes) |
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{ |
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$this->escapeHtmlAttribute = (bool) $escapeHtmlAttributes; |
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return $this; |
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} |
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/** |
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* Returns if text should be escaped |
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* |
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* @return boolean |
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*/ |
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public function isEscapeText() |
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{ |
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return $this->escapeText; |
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} |
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/** |
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* Enable/disable escaping of text |
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* |
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* @param boolean $escapeText |
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* @return HtmlElement |
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*/ |
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public function setEscapeText($escapeText) |
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{ |
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$this->escapeText = (bool) $escapeText; |
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return $this; |
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} |
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/** |
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* Returns escaper for html attributes, if no one is set, escaper of view will be used |
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* |
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* @return string |
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*/ |
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protected function escapeHtmlAttribute($value) |
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{ |
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if (false === $this->escapeHtmlAttribute) { |
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return $value; |
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} |
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return $this->getEscaper()->escapeHtmlAttr($value); |
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} |
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/** |
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* Returns escaper for html, if no one is set, escaper of view will be used |
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* |
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* @return string |
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*/ |
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protected function escapeText($value) |
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{ |
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if (false === $this->escapeText) { |
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return $value; |
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} |
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return $this->getEscaper()->escapeHtml($value); |
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} |
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|
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/** |
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* Sets escaper for html |
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* |
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* @param Escaper $helperEscapeHtml |
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* @return HtmlElement |
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*/ |
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public function setEscaper(Escaper $helperEscapeHtml) |
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{ |
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$this->escaper = $helperEscapeHtml; |
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return $this; |
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} |
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/** |
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* Returns escaper for html, if no one is set, lazy loads escaper from view |
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* |
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* @return Escaper |
424
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*/ |
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protected function getEscaper() |
426
|
|
|
{ |
427
|
|
|
if (null === $this->escaper) { |
428
|
|
|
$this->escaper = $this->getView()->plugin('escapehtml')->getEscaper(); |
|
|
|
|
429
|
|
|
} |
430
|
|
|
return $this->escaper; |
431
|
|
|
} |
432
|
|
|
} |
433
|
|
|
|
Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: