setSeparator(PHP_EOL); } /** * Retrieve object instance; optionally add meta tag * * @param string $content * @param string $keyValue * @param string $keyType * @param array $modifiers * @param string $placement * @return HeadMeta */ public function __invoke( $content = null, $keyValue = null, $keyType = 'name', $modifiers = [], $placement = Placeholder\Container\AbstractContainer::APPEND ) { if ((null !== $content) && (null !== $keyValue)) { $item = $this->createData($keyType, $keyValue, $content, $modifiers); $action = strtolower($placement); switch ($action) { case 'append': case 'prepend': case 'set': $this->$action($item); break; default: $this->append($item); break; } } return $this; } /** * Overload method access * * @param string $method * @param array $args * @throws Exception\BadMethodCallException * @return HeadMeta */ public function __call($method, $args) { if (preg_match( '/^(?Pset|(pre|ap)pend|offsetSet)(?PName|HttpEquiv|Property|Itemprop)$/', $method, $matches )) { $action = $matches['action']; $type = $this->normalizeType($matches['type']); $argc = count($args); $index = null; if ('offsetSet' == $action) { if (0 < $argc) { $index = array_shift($args); --$argc; } } if (2 > $argc) { throw new Exception\BadMethodCallException( 'Too few arguments provided; requires key value, and content' ); } if (3 > $argc) { $args[] = []; } $item = $this->createData($type, $args[0], $args[1], $args[2]); if ('offsetSet' == $action) { return $this->offsetSet($index, $item); } $this->$action($item); return $this; } return parent::__call($method, $args); } /** * Render placeholder as string * * @param string|int $indent * @return string */ public function toString($indent = null) { $indent = (null !== $indent) ? $this->getWhitespace($indent) : $this->getIndent(); $items = []; $this->getContainer()->ksort(); $isHtml5 = $this->view->plugin('doctype')->isHtml5(); try { foreach ($this as $item) { $content = $this->itemToString($item); if ($isHtml5 && $item->type == 'charset') { array_unshift($items, $content); continue; } $items[] = $content; } } catch (Exception\InvalidArgumentException $e) { trigger_error($e->getMessage(), E_USER_WARNING); return ''; } return $indent . implode($this->escape($this->getSeparator()) . $indent, $items); } /** * Create data item for inserting into stack * * @param string $type * @param string $typeValue * @param string $content * @param array $modifiers * @return stdClass */ public function createData($type, $typeValue, $content, array $modifiers) { $data = new stdClass; $data->type = $type; $data->$type = $typeValue; $data->content = $content; $data->modifiers = $modifiers; return $data; } /** * Build meta HTML string * * @param stdClass $item * @throws Exception\InvalidArgumentException * @return string */ public function itemToString(stdClass $item) { if (! in_array($item->type, $this->typeKeys)) { throw new Exception\InvalidArgumentException(sprintf( 'Invalid type "%s" provided for meta', $item->type )); } $type = $item->type; $modifiersString = ''; foreach ($item->modifiers as $key => $value) { if ($this->view->plugin('doctype')->isHtml5() && $key == 'scheme' ) { throw new Exception\InvalidArgumentException( 'Invalid modifier "scheme" provided; not supported by HTML5' ); } if (! in_array($key, $this->modifierKeys)) { continue; } $modifiersString .= $key . '="' . $this->escape($value) . '" '; } $modifiersString = rtrim($modifiersString); if ('' != $modifiersString) { $modifiersString = ' ' . $modifiersString; } if (method_exists($this->view, 'plugin')) { if ($this->view->plugin('doctype')->isHtml5() && $type == 'charset' ) { $tpl = ($this->view->plugin('doctype')->isXhtml()) ? '' : ''; } elseif ($this->view->plugin('doctype')->isXhtml()) { $tpl = ''; } else { $tpl = ''; } } else { $tpl = ''; } $meta = sprintf( $tpl, $type, $this->escape($item->$type), $this->escape($item->content), $modifiersString ); if (isset($item->modifiers['conditional']) && ! empty($item->modifiers['conditional']) && is_string($item->modifiers['conditional']) ) { // inner wrap with comment end and start if !IE if (str_replace(' ', '', $item->modifiers['conditional']) === '!IE') { $meta = '' . $meta . ''; } return $meta; } /** * Normalize type attribute of meta * * @param string $type type in CamelCase * @throws Exception\DomainException * @return string */ protected function normalizeType($type) { switch ($type) { case 'Name': return 'name'; case 'HttpEquiv': return 'http-equiv'; case 'Property': return 'property'; case 'Itemprop': return 'itemprop'; default: throw new Exception\DomainException(sprintf( 'Invalid type "%s" passed to normalizeType', $type )); } } /** * Determine if item is valid * * @param stdClass $item * @return bool */ protected function isValid($item) { if ((! $item instanceof stdClass) || ! isset($item->type) || ! isset($item->modifiers) ) { return false; } $doctype = $this->view->plugin('doctype'); if ($item->type === 'charset' && $doctype->isXhtml()) { return false; } if (! isset($item->content) && (! $doctype->isHtml5() || (! $doctype->isHtml5() && $item->type !== 'charset')) ) { return false; } // is only supported with doctype html if (! $doctype->isHtml5() && $item->type === 'itemprop' ) { return false; } // is only supported with doctype RDFa if (! $doctype->isRdfa() && $item->type === 'property' ) { return false; } return true; } /** * Append * * @param stdClass $value * @return View\Helper\Placeholder\Container\AbstractContainer * @throws Exception\InvalidArgumentException */ public function append($value) { if (! $this->isValid($value)) { throw new Exception\InvalidArgumentException( 'Invalid value passed to append' ); } return $this->getContainer()->append($value); } /** * OffsetSet * * @param string|int $index * @param string $value * @throws Exception\InvalidArgumentException */ public function offsetSet($index, $value) { if (! $this->isValid($value)) { throw new Exception\InvalidArgumentException( 'Invalid value passed to offsetSet; please use offsetSetName() or offsetSetHttpEquiv()' ); } return $this->getContainer()->offsetSet($index, $value); } /** * OffsetUnset * * @param string|int $index * @throws Exception\InvalidArgumentException */ public function offsetUnset($index) { if (! in_array($index, $this->getContainer()->getKeys())) { throw new Exception\InvalidArgumentException('Invalid index passed to offsetUnset()'); } return $this->getContainer()->offsetUnset($index); } /** * Prepend * * @param stdClass $value * @throws Exception\InvalidArgumentException * @return View\Helper\Placeholder\Container\AbstractContainer */ public function prepend($value) { if (! $this->isValid($value)) { throw new Exception\InvalidArgumentException( 'Invalid value passed to prepend' ); } return $this->getContainer()->prepend($value); } /** * Set * * @param stdClass $value * @throws Exception\InvalidArgumentException * @return View\Helper\Placeholder\Container\AbstractContainer */ public function set($value) { if (! $this->isValid($value)) { throw new Exception\InvalidArgumentException('Invalid value passed to set'); } $container = $this->getContainer(); foreach ($container->getArrayCopy() as $index => $item) { if ($item->type == $value->type && $item->{$item->type} == $value->{$value->type}) { $this->offsetUnset($index); } } return $this->append($value); } /** * Create an HTML5-style meta charset tag. Something like * * Not valid in a non-HTML5 doctype * * @param string $charset * @param Exception\InvalidArgumentException * @return HeadMeta Provides a fluent interface */ public function setCharset($charset) { $item = new stdClass; $item->type = 'charset'; $item->charset = $charset; $item->content = null; $item->modifiers = []; if (! $this->isValid($item)) { throw new Exception\InvalidArgumentException( 'XHTML* doctype has no attribute charset; please use appendHttpEquiv()' ); } $this->set($item); return $this; } }