set()`
*
* Since 2.1, the base View class also includes support for themes by default. Theme views are regular
* view files that can provide unique HTML and static assets. If theme views are not found for the
* current view the default app view files will be used. You can set `$this->theme = 'mytheme'`
* in your Controller to use the Themes.
*
* Example of theme path with `$this->theme = 'SuperHot';` Would be `app/View/Themed/SuperHot/Posts`
*
* @package Cake.View
* @property CacheHelper $Cache
* @property FormHelper $Form
* @property HtmlHelper $Html
* @property JsHelper $Js
* @property NumberHelper $Number
* @property PaginatorHelper $Paginator
* @property RssHelper $Rss
* @property SessionHelper $Session
* @property TextHelper $Text
* @property TimeHelper $Time
* @property ViewBlock $Blocks
*/
class View extends Object {
/**
* Helpers collection
*
* @var HelperCollection
*/
public $Helpers;
/**
* ViewBlock instance.
*
* @var ViewBlock
*/
public $Blocks;
/**
* Name of the plugin.
*
* @link http://manual.cakephp.org/chapter/plugins
* @var string
*/
public $plugin = null;
/**
* Name of the controller.
*
* @var string Name of controller
*/
public $name = null;
/**
* Current passed params
*
* @var mixed
*/
public $passedArgs = array();
/**
* An array of names of built-in helpers to include.
*
* @var mixed A single name as a string or a list of names as an array.
*/
public $helpers = array('Html');
/**
* Path to View.
*
* @var string Path to View
*/
public $viewPath = null;
/**
* Variables for the view
*
* @var array
*/
public $viewVars = array();
/**
* Name of view to use with this View.
*
* @var string
*/
public $view = null;
/**
* Name of layout to use with this View.
*
* @var string
*/
public $layout = 'default';
/**
* Path to Layout.
*
* @var string Path to Layout
*/
public $layoutPath = null;
/**
* Turns on or off Cake's conventional mode of applying layout files. On by default.
* Setting to off means that layouts will not be automatically applied to rendered views.
*
* @var boolean
*/
public $autoLayout = true;
/**
* File extension. Defaults to Cake's template ".ctp".
*
* @var string
*/
public $ext = '.ctp';
/**
* Sub-directory for this view file. This is often used for extension based routing.
* Eg. With an `xml` extension, $subDir would be `xml/`
*
* @var string
*/
public $subDir = null;
/**
* Theme name.
*
* @var string
*/
public $theme = null;
/**
* Used to define methods a controller that will be cached.
*
* @see Controller::$cacheAction
* @var mixed
*/
public $cacheAction = false;
/**
* Holds current errors for the model validation.
*
* @var array
*/
public $validationErrors = array();
/**
* True when the view has been rendered.
*
* @var boolean
*/
public $hasRendered = false;
/**
* List of generated DOM UUIDs.
*
* @var array
*/
public $uuids = array();
/**
* An instance of a CakeRequest object that contains information about the current request.
* This object contains all the information about a request and several methods for reading
* additional information about the request.
*
* @var CakeRequest
*/
public $request;
/**
* Reference to the Response object
*
* @var CakeResponse
*/
public $response;
/**
* The Cache configuration View will use to store cached elements. Changing this will change
* the default configuration elements are stored under. You can also choose a cache config
* per element.
*
* @var string
* @see View::element()
*/
public $elementCache = 'default';
/**
* List of variables to collect from the associated controller.
*
* @var array
*/
protected $_passedVars = array(
'viewVars', 'autoLayout', 'ext', 'helpers', 'view', 'layout', 'name', 'theme',
'layoutPath', 'viewPath', 'request', 'plugin', 'passedArgs', 'cacheAction'
);
/**
* Scripts (and/or other tags) for the layout.
*
* @var array
*/
protected $_scripts = array();
/**
* Holds an array of paths.
*
* @var array
*/
protected $_paths = array();
/**
* Indicate that helpers have been loaded.
*
* @var boolean
*/
protected $_helpersLoaded = false;
/**
* The names of views and their parents used with View::extend();
*
* @var array
*/
protected $_parents = array();
/**
* The currently rendering view file. Used for resolving parent files.
*
* @var string
*/
protected $_current = null;
/**
* Currently rendering an element. Used for finding parent fragments
* for elements.
*
* @var string
*/
protected $_currentType = '';
/**
* Content stack, used for nested templates that all use View::extend();
*
* @var array
*/
protected $_stack = array();
/**
* Instance of the CakeEventManager this View object is using
* to dispatch inner events. Usually the manager is shared with
* the controller, so it it possible to register view events in
* the controller layer.
*
* @var CakeEventManager
*/
protected $_eventManager = null;
/**
* The view file to be rendered, only used inside _execute()
*/
private $__viewFileName = null;
/**
* Whether the event manager was already configured for this object
*
* @var boolean
*/
protected $_eventManagerConfigured = false;
const TYPE_VIEW = 'view';
const TYPE_ELEMENT = 'element';
const TYPE_LAYOUT = 'layout';
/**
* Constructor
*
* @param Controller $controller A controller object to pull View::_passedVars from.
*/
public function __construct(Controller $controller = null) {
if (is_object($controller)) {
$count = count($this->_passedVars);
for ($j = 0; $j < $count; $j++) {
$var = $this->_passedVars[$j];
$this->{$var} = $controller->{$var};
}
$this->_eventManager = $controller->getEventManager();
}
if (empty($this->request) && !($this->request = Router::getRequest(true))) {
$this->request = new CakeRequest(null, false);
$this->request->base = '';
$this->request->here = $this->request->webroot = '/';
}
if (is_object($controller) && isset($controller->response)) {
$this->response = $controller->response;
} else {
$this->response = new CakeResponse(array('charset' => Configure::read('App.encoding')));
}
$this->Helpers = new HelperCollection($this);
$this->Blocks = new ViewBlock();
parent::__construct();
}
/**
* Returns the CakeEventManager manager instance that is handling any callbacks.
* You can use this instance to register any new listeners or callbacks to the
* controller events, or create your own events and trigger them at will.
*
* @return CakeEventManager
*/
public function getEventManager() {
if (empty($this->_eventManager)) {
$this->_eventManager = new CakeEventManager();
}
if (!$this->_eventManagerConfigured) {
$this->_eventManager->attach($this->Helpers);
$this->_eventManagerConfigured = true;
}
return $this->_eventManager;
}
/**
* Renders a piece of PHP with provided parameters and returns HTML, XML, or any other string.
*
* This realizes the concept of Elements, (or "partial layouts") and the $params array is used to send
* data to be used in the element. Elements can be cached improving performance by using the `cache` option.
*
* @param string $name Name of template file in the/app/View/Elements/ folder,
* or `MyPlugin.template` to use the template element from MyPlugin. If the element
* is not found in the plugin, the normal view path cascade will be searched.
* @param array $data Array of data to be made available to the rendered view (i.e. the Element)
* @param array $options Array of options. Possible keys are:
* - `cache` - Can either be `true`, to enable caching using the config in View::$elementCache. Or an array
* If an array, the following keys can be used:
* - `config` - Used to store the cached element in a custom cache configuration.
* - `key` - Used to define the key used in the Cache::write(). It will be prefixed with `element_`
* - `plugin` - Load an element from a specific plugin. This option is deprecated, see below.
* - `callbacks` - Set to true to fire beforeRender and afterRender helper callbacks for this element.
* Defaults to false.
* @return string Rendered Element
* @deprecated The `$options['plugin']` is deprecated and will be removed in CakePHP 3.0. Use
* `Plugin.element_name` instead.
*/
public function element($name, $data = array(), $options = array()) {
$file = $plugin = $key = null;
$callbacks = false;
if (isset($options['plugin'])) {
$name = Inflector::camelize($options['plugin']) . '.' . $name;
}
if (isset($options['callbacks'])) {
$callbacks = $options['callbacks'];
}
if (isset($options['cache'])) {
$underscored = null;
if ($plugin) {
$underscored = Inflector::underscore($plugin);
}
$keys = array_merge(array($underscored, $name), array_keys($options), array_keys($data));
$caching = array(
'config' => $this->elementCache,
'key' => implode('_', $keys)
);
if (is_array($options['cache'])) {
$defaults = array(
'config' => $this->elementCache,
'key' => $caching['key']
);
$caching = array_merge($defaults, $options['cache']);
}
$key = 'element_' . $caching['key'];
$contents = Cache::read($key, $caching['config']);
if ($contents !== false) {
return $contents;
}
}
$file = $this->_getElementFilename($name);
if ($file) {
if (!$this->_helpersLoaded) {
$this->loadHelpers();
}
if ($callbacks) {
$this->getEventManager()->dispatch(new CakeEvent('View.beforeRender', $this, array($file)));
}
$this->_currentType = self::TYPE_ELEMENT;
$element = $this->_render($file, array_merge($this->viewVars, $data));
if ($callbacks) {
$this->getEventManager()->dispatch(new CakeEvent('View.afterRender', $this, array($file, $element)));
}
if (isset($options['cache'])) {
Cache::write($key, $element, $caching['config']);
}
return $element;
}
$file = 'Elements' . DS . $name . $this->ext;
if (Configure::read('debug') > 0) {
return __d('cake_dev', 'Element Not Found: %s', $file);
}
}
/**
* Renders view for given view file and layout.
*
* Render triggers helper callbacks, which are fired before and after the view are rendered,
* as well as before and after the layout. The helper callbacks are called:
*
* - `beforeRender`
* - `afterRender`
* - `beforeLayout`
* - `afterLayout`
*
* If View::$autoRender is false and no `$layout` is provided, the view will be returned bare.
*
* View and layout names can point to plugin views/layouts. Using the `Plugin.view` syntax
* a plugin view/layout can be used instead of the app ones. If the chosen plugin is not found
* the view will be located along the regular view path cascade.
*
* @param string $view Name of view file to use
* @param string $layout Layout to use.
* @return string Rendered Element
* @throws CakeException if there is an error in the view.
*/
public function render($view = null, $layout = null) {
if ($this->hasRendered) {
return true;
}
if (!$this->_helpersLoaded) {
$this->loadHelpers();
}
$this->Blocks->set('content', '');
if ($view !== false && $viewFileName = $this->_getViewFileName($view)) {
$this->_currentType = self::TYPE_VIEW;
$this->getEventManager()->dispatch(new CakeEvent('View.beforeRender', $this, array($viewFileName)));
$this->Blocks->set('content', $this->_render($viewFileName));
$this->getEventManager()->dispatch(new CakeEvent('View.afterRender', $this, array($viewFileName)));
}
if ($layout === null) {
$layout = $this->layout;
}
if ($layout && $this->autoLayout) {
$this->Blocks->set('content', $this->renderLayout('', $layout));
}
$this->hasRendered = true;
return $this->Blocks->get('content');
}
/**
* Renders a layout. Returns output from _render(). Returns false on error.
* Several variables are created for use in layout.
*
* - `title_for_layout` - A backwards compatible place holder, you should set this value if you want more control.
* - `content_for_layout` - contains rendered view file
* - `scripts_for_layout` - Contains content added with addScript() as well as any content in
* the 'meta', 'css', and 'script' blocks. They are appended in that order.
*
* Deprecated features:
*
* - `$scripts_for_layout` is deprecated and will be removed in CakePHP 3.0.
* Use the block features instead. `meta`, `css` and `script` will be populated
* by the matching methods on HtmlHelper.
* - `$title_for_layout` is deprecated and will be removed in CakePHP 3.0
* - `$content_for_layout` is deprecated and will be removed in CakePHP 3.0.
* Use the `content` block instead.
*
* @param string $content Content to render in a view, wrapped by the surrounding layout.
* @param string $layout Layout name
* @return mixed Rendered output, or false on error
* @throws CakeException if there is an error in the view.
*/
public function renderLayout($content, $layout = null) {
$layoutFileName = $this->_getLayoutFileName($layout);
if (empty($layoutFileName)) {
return $this->Blocks->get('content');
}
if (!$this->_helpersLoaded) {
$this->loadHelpers();
}
if (empty($content)) {
$content = $this->Blocks->get('content');
}
$this->getEventManager()->dispatch(new CakeEvent('View.beforeLayout', $this, array($layoutFileName)));
$scripts = implode("\n\t", $this->_scripts);
$scripts .= $this->Blocks->get('meta') . $this->Blocks->get('css') . $this->Blocks->get('script');
$this->viewVars = array_merge($this->viewVars, array(
'content_for_layout' => $content,
'scripts_for_layout' => $scripts,
));
if (!isset($this->viewVars['title_for_layout'])) {
$this->viewVars['title_for_layout'] = Inflector::humanize($this->viewPath);
}
$this->_currentType = self::TYPE_LAYOUT;
$this->Blocks->set('content', $this->_render($layoutFileName));
$this->getEventManager()->dispatch(new CakeEvent('View.afterLayout', $this, array($layoutFileName)));
return $this->Blocks->get('content');
}
/**
* Render cached view. Works in concert with CacheHelper and Dispatcher to
* render cached view files.
*
* @param string $filename the cache file to include
* @param string $timeStart the page render start time
* @return boolean Success of rendering the cached file.
*/
public function renderCache($filename, $timeStart) {
ob_start();
include ($filename);
if (Configure::read('debug') > 0 && $this->layout != 'xml') {
echo "";
}
$out = ob_get_clean();
if (preg_match('/^/', $out, $match)) {
if (time() >= $match['1']) {
@unlink($filename);
unset ($out);
return false;
} else {
if ($this->layout === 'xml') {
header('Content-type: text/xml');
}
$commentLength = strlen('');
return substr($out, $commentLength);
}
}
}
/**
* Returns a list of variables available in the current View context
*
* @return array Array of the set view variable names.
*/
public function getVars() {
return array_keys($this->viewVars);
}
/**
* Returns the contents of the given View variable(s)
*
* @param string $var The view var you want the contents of.
* @return mixed The content of the named var if its set, otherwise null.
* @deprecated Will be removed in 3.0 Use View::get() instead.
*/
public function getVar($var) {
return $this->get($var);
}
/**
* Returns the contents of the given View variable or a block.
* Blocks are checked before view variables.
*
* @param string $var The view var you want the contents of.
* @return mixed The content of the named var if its set, otherwise null.
*/
public function get($var) {
if (!isset($this->viewVars[$var])) {
return null;
}
return $this->viewVars[$var];
}
/**
* Get the names of all the existing blocks.
*
* @return array An array containing the blocks.
* @see ViewBlock::keys()
*/
public function blocks() {
return $this->Blocks->keys();
}
/**
* Start capturing output for a 'block'
*
* @param string $name The name of the block to capture for.
* @return void
* @see ViewBlock::start()
*/
public function start($name) {
return $this->Blocks->start($name);
}
/**
* Append to an existing or new block. Appending to a new
* block will create the block.
*
* @param string $name Name of the block
* @param string $value The content for the block.
* @return void
* @throws CakeException when you use non-string values.
* @see ViewBlock::append()
*/
public function append($name, $value = null) {
return $this->Blocks->append($name, $value);
}
/**
* Set the content for a block. This will overwrite any
* existing content.
*
* @param string $name Name of the block
* @param string $value The content for the block.
* @return void
* @throws CakeException when you use non-string values.
* @see ViewBlock::assign()
*/
public function assign($name, $value) {
return $this->Blocks->set($name, $value);
}
/**
* Fetch the content for a block. If a block is
* empty or undefined '' will be returned.
*
* @param string $name Name of the block
* @return The block content or '' if the block does not exist.
* @see ViewBlock::fetch()
*/
public function fetch($name) {
return $this->Blocks->get($name);
}
/**
* End a capturing block. The compliment to View::start()
*
* @return void
* @see ViewBlock::start()
*/
public function end() {
return $this->Blocks->end();
}
/**
* Provides view or element extension/inheritance. Views can extends a
* parent view and populate blocks in the parent template.
*
* @param string $name The view or element to 'extend' the current one with.
* @return void
* @throws LogicException when you extend a view with itself or make extend loops.
* @throws LogicException when you extend an element which doesn't exist
*/
public function extend($name) {
if ($name[0] === '/' || $this->_currentType === self::TYPE_VIEW) {
$parent = $this->_getViewFileName($name);
} else {
switch ($this->_currentType) {
case self::TYPE_ELEMENT:
$parent = $this->_getElementFileName($name);
if (!$parent) {
list($plugin, $name) = $this->pluginSplit($name);
$paths = $this->_paths($plugin);
$defaultPath = $paths[0] . 'Elements' . DS;
throw new LogicException(__d(
'cake_dev',
'You cannot extend an element which does not exist (%s).',
$defaultPath . $name . $this->ext
));
}
break;
case self::TYPE_LAYOUT:
$parent = $this->_getLayoutFileName($name);
break;
default:
$parent = $this->_getViewFileName($name);
}
}
if ($parent == $this->_current) {
throw new LogicException(__d('cake_dev', 'You cannot have views extend themselves.'));
}
if (isset($this->_parents[$parent]) && $this->_parents[$parent] == $this->_current) {
throw new LogicException(__d('cake_dev', 'You cannot have views extend in a loop.'));
}
$this->_parents[$this->_current] = $parent;
}
/**
* Adds a script block or other element to be inserted in $scripts_for_layout in
* the `