lithium\template\view\adapter\File
Implements
ArrayAccess
Extends
lithium\template\view\Renderer
The File adapter implements both template loading and rendering, and uses the
lithium\template\view\Stream
class or lithium\template\view\Compiler
class to auto-escape
template output with short tags (i.e. <?=
).
For more information about implementing your own template loaders or renderers, see the
lithium\template\View
class.
Source
class File extends \lithium\template\view\Renderer implements \ArrayAccess {
/**
* These configuration variables will automatically be assigned to their corresponding protected
* properties when the object is initialized.
*
* @var array
*/
protected $_autoConfig = [
'classes' => 'merge', 'request', 'response', 'context',
'strings', 'handlers', 'view', 'compile', 'paths'
];
/**
* Boolean flag indicating whether templates should be pre-compiled before inclusion. For more
* information on template compilation, see `view\Compiler`.
*
* @see lithium\template\view\Compiler
* @var boolean
*/
protected $_compile = true;
/**
* An array containing the variables currently in the scope of the template. These values are
* manipulable using array syntax against the template object, i.e. `$this['foo'] = 'bar'`
* inside your template files.
*
* @var array
*/
protected $_data = [];
/**
* Variables that have been set from a view/element/layout/etc. that should be available to the
* same rendering context.
*
* @var array Key/value pairs of variables
*/
protected $_vars = [];
protected $_paths = [];
/**
* `File`'s dependencies. These classes are used by the output handlers to generate URLs
* for dynamic resources and static assets, as well as compiling the templates.
*
* @see Renderer::$_handlers
* @var array
*/
protected $_classes = [
'compiler' => 'lithium\template\view\Compiler',
'router' => 'lithium\net\http\Router',
'media' => 'lithium\net\http\Media'
];
/**
* Constructor.
*
* @param array $config Configuration options.
* @return void
*/
public function __construct(array $config = []) {
$defaults = [
'classes' => [],
'compile' => true,
'compiler' => [],
'extract' => true,
'paths' => []
];
parent::__construct($config + $defaults);
}
/**
* Renders content from a template file provided by `template()`.
*
* @param string $template
* @param array|string $data
* @param array $options
* @return string
*/
public function render($template, $data = [], array $options = []) {
$defaults = ['context' => []];
$options += $defaults;
$this->_context = $options['context'] + $this->_context;
$this->_data = (array) $data + $this->_vars;
$this->_options = $options;
$template__ = $template;
unset($options, $template, $defaults, $data);
if ($this->_config['extract']) {
extract($this->_data, EXTR_OVERWRITE);
} elseif ($this->_view) {
extract((array) $this->_view->outputFilters, EXTR_OVERWRITE);
}
ob_start();
include $template__;
return ob_get_clean();
}
/**
* Returns a template file name
*
* @param string $type
* @param array $params
* @return string
*/
public function template($type, array $params) {
$library = Libraries::get(isset($params['library']) ? $params['library'] : true);
$params['library'] = $library['path'];
$path = $this->_paths($type, $params);
if ($this->_compile) {
$compiler = $this->_classes['compiler'];
$path = $compiler::template($path, $this->_config['compiler']);
}
return $path;
}
/**
* Allows checking to see if a value is set in template data.
*
* Part of `ArrayAccess`.
*
* ```
* isset($file['bar']);
* $file->offsetExists('bar');
* ```
*
* @param string $offset Key / variable name to check.
* @return boolean Returns `true` if the value is set, otherwise `false`.
*/
public function offsetExists($offset) {
return array_key_exists($offset, $this->_data);
}
/**
* Gets the offset, or null in the template data.
*
* Part of `ArrayAccess`.
*
* ```
* $file['bar'];
* $file->offsetGet('bar');
* ```
*
* @param string $offset Key / variable name to check.
* @return mixed
*/
public function offsetGet($offset) {
return isset($this->_data[$offset]) ? $this->_data[$offset] : null;
}
/**
* Sets the offset with the given value.
*
* Part of `ArrayAccess`.
*
* ```
* $file['bar'] = 'baz';
* $file->offsetSet('bar', 'baz');
* ```
*
* @param string $offset Key / variable name to check.
* @param mixed $value Value you wish to set to `$offset`.
* @return void
*/
public function offsetSet($offset, $value) {
$this->_data[$offset] = $value;
}
/**
* Unsets the given offset.
*
* Part of `ArrayAccess`.
*
* ```
* unset($file['bar']);
* $file->offsetUnset('bar');
* ```
*
* @param string $offset Key / variable name to check.
* @return void
*/
public function offsetUnset($offset) {
unset($this->_data[$offset]);
}
/**
* Searches one or more path templates for a matching template file, and returns the file name.
*
* @param string $type
* @param array $params The set of options keys to be interpolated into the path templates
* when searching for the correct file to load.
* @return string Returns the first template file found. Throws an exception if no templates
* are available.
*/
protected function _paths($type, array $params) {
if (!isset($this->_paths[$type])) {
throw new TemplateException("Invalid template type '{$type}'.");
}
foreach ((array) $this->_paths[$type] as $path) {
if (!file_exists($path = Text::insert($path, $params))) {
continue;
}
return $path;
}
throw new TemplateException("Template not found at path `{$path}`.");
}
}