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Diffstat (limited to 'vendor/ipl/html/src/Attributes.php')
| -rw-r--r-- | vendor/ipl/html/src/Attributes.php | 518 |
1 files changed, 518 insertions, 0 deletions
diff --git a/vendor/ipl/html/src/Attributes.php b/vendor/ipl/html/src/Attributes.php new file mode 100644 index 0000000..8df9bbd --- /dev/null +++ b/vendor/ipl/html/src/Attributes.php @@ -0,0 +1,518 @@ +<?php + +namespace ipl\Html; + +use ArrayAccess; +use ArrayIterator; +use InvalidArgumentException; +use IteratorAggregate; +use Traversable; + +use function ipl\Stdlib\get_php_type; + +/** + * HTML attributes + * + * HTML attributes provide additional information about HTML elements, that configure the elements or adjust their + * behavior in various ways. + * + * Attributes usually come in name-value pairs and are rendered as name="value". + */ +class Attributes implements ArrayAccess, IteratorAggregate +{ + /** @var Attribute[] */ + protected $attributes = []; + + /** @var callable[] */ + protected $callbacks = []; + + /** @var string */ + protected $prefix = ''; + + /** @var callable[] */ + protected $setterCallbacks = []; + + /** + * Create new HTML attributes + * + * @param array $attributes + */ + public function __construct(array $attributes = null) + { + if (empty($attributes)) { + return; + } + + foreach ($attributes as $key => $value) { + if ($value instanceof Attribute) { + $this->addAttribute($value); + } elseif (is_string($key)) { + $this->add($key, $value); + } elseif (is_array($value) && count($value) === 2) { + $this->add(array_shift($value), array_shift($value)); + } + } + } + + /** + * Create new HTML attributes + * + * @param array $attributes + * + * @return static + */ + public static function create(array $attributes = null) + { + return new static($attributes); + } + + /** + * Ensure that the given attributes of mixed type are converted to an instance of attributes + * + * The conversion procedure is as follows: + * + * If the given attributes is already an instance of Attributes, returns the very same element. + * If the attributes are given as an array of attribute name-value pairs, they are used to + * construct and return a new Attributes instance. + * If the attributes are null, an empty new instance of Attributes is returned. + * + * @param array|static|null $attributes + * + * @return static + * + * @throws InvalidArgumentException In case the given attributes are of an unsupported type + */ + public static function wantAttributes($attributes) + { + if ($attributes instanceof self) { + return $attributes; + } + + if (is_array($attributes)) { + return new static($attributes); + } + + if ($attributes === null) { + return new static(); + } + + throw new InvalidArgumentException(sprintf( + 'Attributes instance, array or null expected. Got %s instead.', + get_php_type($attributes) + )); + } + + /** + * Get the collection of attributes as array + * + * @return Attribute[] + */ + public function getAttributes() + { + return $this->attributes; + } + + /** + * Merge the given attributes + * + * @param Attributes $attributes + * + * @return $this + */ + public function merge(Attributes $attributes) + { + foreach ($attributes as $attribute) { + $this->addAttribute($attribute); + } + + foreach ($attributes->callbacks as $name => $getter) { + $setter = null; + if (isset($attributes->setterCallbacks[$name])) { + $setter = $attributes->setterCallbacks[$name]; + } + + $this->registerAttributeCallback($name, $getter, $setter); + } + + return $this; + } + + /** + * Return true if the attribute with the given name exists, false otherwise + * + * @param string $name + * + * @return bool + */ + public function has($name) + { + return array_key_exists($name, $this->attributes); + } + + /** + * Get the attribute with the given name + * + * If the attribute does not yet exist, it is automatically created and registered to this Attributes instance. + * + * @param string $name + * + * @return Attribute + * + * @throws InvalidArgumentException If the attribute does not yet exist and its name contains special characters + */ + public function get($name) + { + if (! $this->has($name)) { + $this->attributes[$name] = Attribute::createEmpty($name); + } + + return $this->attributes[$name]; + } + + /** + * Set the given attribute(s) + * + * If the attribute with the given name already exists, it gets overridden. + * + * @param string|array|Attribute|self $attribute The attribute(s) to add + * @param string|bool|array $value The value of the attribute + * + * @return $this + * + * @throws InvalidArgumentException If the attribute name contains special characters + */ + public function set($attribute, $value = null) + { + if ($attribute instanceof self) { + foreach ($attribute as $a) { + $this->setAttribute($a); + } + + return $this; + } + + if ($attribute instanceof Attribute) { + $this->setAttribute($attribute); + + return $this; + } + + if (is_array($attribute)) { + foreach ($attribute as $name => $value) { + $this->set($name, $value); + } + + return $this; + } + + if (array_key_exists($attribute, $this->setterCallbacks)) { + $callback = $this->setterCallbacks[$attribute]; + + $callback($value); + + return $this; + } + + $this->attributes[$attribute] = Attribute::create($attribute, $value); + + return $this; + } + + /** + * Add the given attribute(s) + * + * If an attribute with the same name already exists, the attribute's value will be added to the current value of + * the attribute. + * + * @param string|array|Attribute|self $attribute The attribute(s) to add + * @param string|bool|array $value The value of the attribute + * + * @return $this + * + * @throws InvalidArgumentException If the attribute does not yet exist and its name contains special characters + */ + public function add($attribute, $value = null) + { + if ($attribute === null) { + return $this; + } + + if ($attribute instanceof self) { + foreach ($attribute as $attr) { + $this->add($attr); + } + + return $this; + } + + if (is_array($attribute)) { + foreach ($attribute as $name => $value) { + $this->add($name, $value); + } + + return $this; + } + + if ($attribute instanceof Attribute) { + $this->addAttribute($attribute); + + return $this; + } + + if (array_key_exists($attribute, $this->setterCallbacks)) { + $callback = $this->setterCallbacks[$attribute]; + + $callback($value); + + return $this; + } + + if (! array_key_exists($attribute, $this->attributes)) { + $this->attributes[$attribute] = Attribute::create($attribute, $value); + } else { + $this->attributes[$attribute]->addValue($value); + } + + return $this; + } + + /** + * Remove the attribute with the given name or remove the given value from the attribute + * + * @param string $name The name of the attribute + * @param null|string|array $value The value to remove if specified + * + * @return ?Attribute The removed or changed attribute, if any, otherwise null + */ + public function remove($name, $value = null): ?Attribute + { + if (! $this->has($name)) { + return null; + } + + $attribute = $this->attributes[$name]; + + if ($value === null) { + unset($this->attributes[$name]); + } else { + $attribute->removeValue($value); + } + + return $attribute; + } + + /** + * Set the specified attribute + * + * @param Attribute $attribute + * + * @return $this + */ + public function setAttribute(Attribute $attribute) + { + $this->attributes[$attribute->getName()] = $attribute; + + return $this; + } + + /** + * Add the specified attribute + * + * If an attribute with the same name already exists, the given attribute's value + * will be added to the current value of the attribute. + * + * @param Attribute $attribute + * + * @return $this + */ + public function addAttribute(Attribute $attribute) + { + $name = $attribute->getName(); + + if ($this->has($name)) { + $this->attributes[$name]->addValue($attribute->getValue()); + } else { + $this->attributes[$name] = $attribute; + } + + return $this; + } + + /** + * Get the attributes name prefix + * + * @return string|null + */ + public function getPrefix() + { + return $this->prefix; + } + + /** + * Set the attributes name prefix + * + * @param string $prefix + * + * @return $this + */ + public function setPrefix($prefix) + { + $this->prefix = $prefix; + + return $this; + } + + /** + * Register callback for an attribute + * + * @param string $name Name of the attribute to register the callback for + * @param ?callable $callback Callback to call when retrieving the attribute + * @param ?callable $setterCallback Callback to call when setting the attribute + * + * @return $this + */ + public function registerAttributeCallback(string $name, ?callable $callback, ?callable $setterCallback = null): self + { + if ($callback !== null) { + $this->callbacks[$name] = $callback; + } + + if ($setterCallback !== null) { + $this->setterCallbacks[$name] = $setterCallback; + } + + return $this; + } + + /** + * Render attributes to HTML + * + * If the value of an attribute is of type boolean, it will be rendered as + * {@link http://www.w3.org/TR/html5/infrastructure.html#boolean-attributes boolean attribute}. + * + * If the value of an attribute is null, it will be skipped. + * + * HTML-escaping of the attributes' values takes place automatically using {@link Attribute::escapeValue()}. + * + * @return string + * + * @throws InvalidArgumentException If the result of a callback is invalid + */ + public function render() + { + $attributes = $this->attributes; + foreach ($this->callbacks as $name => $callback) { + $attribute = call_user_func($callback); + if ($attribute instanceof Attribute) { + if ($attribute->isEmpty()) { + continue; + } + } elseif ($attribute === null) { + continue; + } elseif (is_scalar($attribute)) { + $attribute = Attribute::create($name, $attribute); + } else { + throw new InvalidArgumentException(sprintf( + 'A registered attribute callback must return a scalar, null' + . ' or an Attribute, got a %s', + get_php_type($attribute) + )); + } + + $name = $attribute->getName(); + if (isset($attributes[$name])) { + $attributes[$name] = clone $attributes[$name]; + $attributes[$name]->addValue($attribute->getValue()); + } else { + $attributes[$name] = $attribute; + } + } + + $parts = []; + foreach ($attributes as $attribute) { + if ($attribute->isEmpty()) { + continue; + } + + $parts[] = $attribute->render(); + } + + if (empty($parts)) { + return ''; + } + + $separator = ' ' . $this->getPrefix(); + + return $separator . implode($separator, $parts); + } + + /** + * Get whether the attribute with the given name exists + * + * @param string $name Name of the attribute + * + * @return bool + */ + public function offsetExists($name): bool + { + return $this->has($name); + } + + /** + * Get the attribute with the given name + * + * If the attribute does not yet exist, it is automatically created and registered to this Attributes instance. + * + * @param string $name Name of the attribute + * + * @return Attribute + * + * @throws InvalidArgumentException If the attribute does not yet exist and its name contains special characters + */ + public function offsetGet($name): Attribute + { + return $this->get($name); + } + + /** + * Set the given attribute + * + * If the attribute with the given name already exists, it gets overridden. + * + * @param string $name Name of the attribute + * @param mixed $value Value of the attribute + * + * @throws InvalidArgumentException If the attribute name contains special characters + */ + public function offsetSet($name, $value): void + { + $this->set($name, $value); + } + + /** + * Remove the attribute with the given name + * + * @param string $name Name of the attribute + */ + public function offsetUnset($name): void + { + $this->remove($name); + } + + /** + * Get an iterator for traversing the attributes + * + * @return Attribute[]|ArrayIterator + */ + public function getIterator(): Traversable + { + return new ArrayIterator($this->attributes); + } + + public function __clone() + { + foreach ($this->attributes as &$attribute) { + $attribute = clone $attribute; + } + } +} |