cakephp2-php8/cake/libs/view/view.php
gwoo f7d07012dd cleaning up some deprecated code. renderElement is deprecated, but a the notice was removed for this release. Notice will be thrown in next release and method will be removed in the following release. Refactor of View Caching, along with addition of enabling beforeFilter and component initialize/startup callbacks. Use {{{
//set for the individual action
var $cacheAction = array('view' => array('duration' => '+1 hour', 'callbacks' => false)); 
//globally disable callbacks for all actions
var $cacheAction = array(callbacks' => false, 'view' => '+1 hour');  
//per method
$this->cacheAction = array('duration' => '+1 hour', 'callbacks' => true);
}}}

git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@7031 3807eeeb-6ff5-0310-8944-8be069107fe0
2008-05-23 17:43:13 +00:00

908 lines
No EOL
23 KiB
PHP

<?php
/* SVN FILE: $Id$ */
/**
* Methods for displaying presentation data in the view.
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
* Copyright 2005-2008, Cake Software Foundation, Inc.
* 1785 E. Sahara Avenue, Suite 490-204
* Las Vegas, Nevada 89104
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @filesource
* @copyright Copyright 2005-2008, Cake Software Foundation, Inc.
* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs.view
* @since CakePHP(tm) v 0.10.0.1076
* @version $Revision$
* @modifiedby $LastChangedBy$
* @lastmodified $Date$
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
/**
* Included libraries.
*/
App::import('Core', array('Helper', 'ClassRegistry'));
/**
* View, the V in the MVC triad.
*
* Class holding methods for displaying presentation data.
*
* @package cake
* @subpackage cake.cake.libs.view
*/
class View extends Object {
/**
* Path parts for creating links in views.
*
* @var string Base URL
* @access public
*/
var $base = null;
/**
* Stores the current URL (for links etc.)
*
* @var string Current URL
*/
var $here = null;
/**
* Name of the plugin.
*
* @link http://manual.cakephp.org/chapter/plugins
* @var string
*/
var $plugin = null;
/**
* Name of the controller.
*
* @var string Name of controller
* @access public
*/
var $name = null;
/**
* Action to be performed.
*
* @var string Name of action
* @access public
*/
var $action = null;
/**
* Array of parameter data
*
* @var array Parameter data
*/
var $params = array();
/**
* Current passed params
*
* @var mixed
*/
var $passedArgs = array();
/**
* Array of data
*
* @var array Parameter data
*/
var $data = 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.
* @access public
*/
var $helpers = array('Html');
/**
* Path to View.
*
* @var string Path to View
*/
var $viewPath = null;
/**
* Variables for the view
*
* @var array
* @access public
*/
var $viewVars = array();
/**
* Name of layout to use with this View.
*
* @var string
* @access public
*/
var $layout = 'default';
/**
* Path to Layout.
*
* @var string Path to Layout
*/
var $layoutPath = null;
/**
* Title HTML element of this View.
*
* @var string
* @access public
*/
var $pageTitle = false;
/**
* Turns on or off Cake's conventional mode of rendering views. On by default.
*
* @var boolean
* @access public
*/
var $autoRender = true;
/**
* Turns on or off Cake's conventional mode of finding layout files. On by default.
*
* @var boolean
* @access public
*/
var $autoLayout = true;
/**
* File extension. Defaults to Cake's template ".ctp".
*
* @var string
*/
var $ext = '.ctp';
/**
* Sub-directory for this view file.
*
* @var string
*/
var $subDir = null;
/**
* Theme name.
*
* @var string
*/
var $themeWeb = null;
/**
* Used to define methods a controller that will be cached.
*
* @see Controller::$cacheAction
* @var mixed
* @access public
*/
var $cacheAction = false;
/**
* holds current errors for the model validation
*
* @var array
*/
var $validationErrors = array();
/**
* True when the view has been rendered.
*
* @var boolean
*/
var $hasRendered = false;
/**
* Array of loaded view helpers.
*
* @var array
*/
var $loaded = array();
/**
* True if in scope of model-specific region
*
* @var boolean
*/
var $modelScope = false;
/**
* Name of current model this view context is attached to
*
* @var string
*/
var $model = null;
/**
* Name of association model this view context is attached to
*
* @var string
*/
var $association = null;
/**
* Name of current model field this view context is attached to
*
* @var string
*/
var $field = null;
/**
* Suffix of current field this view context is attached to
*
* @var string
*/
var $fieldSuffix = null;
/**
* The current model ID this view context is attached to
*
* @var mixed
*/
var $modelId = null;
/**
* List of generated DOM UUIDs
*
* @var array
*/
var $uuids = array();
/**
* Holds View output.
*
* @var string
**/
var $output = false;
/**
* List of variables to collect from the associated controller
*
* @var array
* @access protected
*/
var $__passedVars = array('viewVars', 'action', 'autoLayout', 'autoRender', 'ext', 'base', 'webroot', 'helpers', 'here', 'layout', 'name', 'pageTitle', 'layoutPath', 'viewPath', 'params', 'data', 'plugin', 'passedArgs', 'cacheAction');
/**
* Scripts (and/or other <head /> tags) for the layout
*
* @var array
* @access private
*/
var $__scripts = array();
/**
* Holds an array of paths.
*
* @var array
*/
var $__paths = array();
/**
* Constructor
*
* @return View
*/
function __construct(&$controller, $register = true) {
if (is_object($controller)) {
$count = count($this->__passedVars);
for ($j = 0; $j < $count; $j++) {
$var = $this->__passedVars[$j];
$this->{$var} = $controller->{$var};
}
}
parent::__construct();
if ($register) {
ClassRegistry::addObject('view', $this);
}
}
/**
* 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.
*
* @param string $name Name of template file in the/app/views/elements/ folder
* @param array $params Array of data to be made available to the for rendered view (i.e. the Element)
* @return string Rendered Element
* @access public
*/
function element($name, $params = array(), $loadHelpers = false) {
$file = $plugin = $key = null;
if (isset($params['plugin'])) {
$plugin = $params['plugin'];
}
if (isset($this->plugin) && !$plugin) {
$plugin = $this->plugin;
}
if (isset($params['cache'])) {
$expires = '+1 day';
if (is_array($params['cache'])) {
$expires = $params['cache']['time'];
$key = Inflector::slug($params['cache']['key']);
} elseif ($params['cache'] !== true) {
$expires = $params['cache'];
$key = implode('_', array_keys($params));
}
if ($expires) {
$cacheFile = 'element_' . $key . '_' . $plugin . Inflector::slug($name);
$cache = cache('views' . DS . $cacheFile, null, $expires);
if (is_string($cache)) {
return $cache;
}
}
}
$paths = $this->_paths($plugin);
foreach ($paths as $path) {
if (file_exists($path . 'elements' . DS . $name . $this->ext)) {
$file = $path . 'elements' . DS . $name . $this->ext;
break;
} elseif (file_exists($path . 'elements' . DS . $name . '.thtml')) {
$file = $path . 'elements' . DS . $name . '.thtml';
break;
}
}
if (is_file($file)) {
$params = array_merge_recursive($params, $this->loaded);
$element = $this->_render($file, array_merge($this->viewVars, $params), $loadHelpers);
if (isset($params['cache']) && isset($cacheFile) && isset($expires)) {
cache('views' . DS . $cacheFile, $element, $expires);
}
return $element;
}
$file = $paths[0] . 'elements' . DS . $name . $this->ext;
if (Configure::read() > 0) {
return "Not Found: " . $file;
}
}
/**
* Renders view for given action and layout. If $file is given, that is used
* for a view filename (e.g. customFunkyView.ctp).
*
* @param string $action Name of action to render for
* @param string $layout Layout to use
* @param string $file Custom filename for view
* @return string Rendered Element
*/
function render($action = null, $layout = null, $file = null) {
if ($this->hasRendered) {
return true;
}
$out = null;
if ($file != null) {
$action = $file;
}
if ($action !== false && $viewFileName = $this->_getViewFileName($action)) {
if (substr($viewFileName, -3) === 'ctp' || substr($viewFileName, -5) === 'thtml') {
$out = View::_render($viewFileName, $this->viewVars);
} else {
$out = $this->_render($viewFileName, $this->viewVars);
}
}
if ($layout === null) {
$layout = $this->layout;
}
if ($out !== false) {
if ($layout && $this->autoLayout) {
$out = $this->renderLayout($out, $layout);
if (isset($this->loaded['cache']) && (($this->cacheAction != false)) && (Configure::read('Cache.check') === true)) {
$replace = array('<cake:nocache>', '</cake:nocache>');
$out = str_replace($replace, '', $out);
}
}
$this->hasRendered = true;
} else {
$out = $this->_render($viewFileName, $this->viewVars);
trigger_error(sprintf(__("Error in view %s, got: <blockquote>%s</blockquote>", true), $viewFileName, $out), E_USER_ERROR);
}
return $out;
}
/**
* Renders a layout. Returns output from _render(). Returns false on error.
*
* @param string $content_for_layout Content to render in a view, wrapped by the surrounding layout.
* @return mixed Rendered output, or false on error
*/
function renderLayout($content_for_layout, $layout = null) {
$layout_fn = $this->_getLayoutFileName($layout);
$debug = '';
if (isset($this->viewVars['cakeDebug']) && Configure::read() > 2) {
$debug = View::element('dump', array('controller' => $this->viewVars['cakeDebug']), false);
unset($this->viewVars['cakeDebug']);
}
if ($this->pageTitle !== false) {
$pageTitle = $this->pageTitle;
} else {
$pageTitle = Inflector::humanize($this->viewPath);
}
$data_for_layout = array_merge($this->viewVars,
array(
'title_for_layout' => $pageTitle,
'content_for_layout' => $content_for_layout,
'scripts_for_layout' => join("\n\t", $this->__scripts),
'cakeDebug' => $debug
)
);
if (empty($this->loaded) && !empty($this->helpers)) {
$loadHelpers = true;
} else {
$loadHelpers = false;
$data_for_layout = array_merge($data_for_layout, $this->loaded);
}
if (!empty($this->loaded)) {
foreach ($this->loaded as $helper) {
if (is_object($helper)) {
if (is_subclass_of($helper, 'Helper') || is_subclass_of($helper, 'helper')) {
$helper->beforeLayout();
}
}
}
}
if (substr($layout_fn, -3) === 'ctp' || substr($layout_fn, -5) === 'thtml') {
$this->output = View::_render($layout_fn, $data_for_layout, $loadHelpers, true);
} else {
$this->output = $this->_render($layout_fn, $data_for_layout, $loadHelpers);
}
if ($this->output === false) {
$this->output = $this->_render($layout_fn, $data_for_layout);
trigger_error(sprintf(__("Error in layout %s, got: <blockquote>%s</blockquote>", true), $layout_fn, $this->output), E_USER_ERROR);
return false;
}
if (!empty($this->loaded)) {
foreach ($this->loaded as $helper) {
if (is_object($helper)) {
if (is_subclass_of($helper, 'Helper') || is_subclass_of($helper, 'helper')) {
$helper->afterLayout();
}
}
}
}
return $this->output;
}
/**
* Render cached view
*
* @param string $filename the cache file to include
* @param string $timeStart the page render start time
*/
function renderCache($filename, $timeStart) {
ob_start();
include ($filename);
if (Configure::read() > 0 && $this->layout != 'xml') {
echo "<!-- Cached Render Time: " . round(getMicrotime() - $timeStart, 4) . "s -->";
}
$out = ob_get_clean();
if (preg_match('/^<!--cachetime:(\\d+)-->/', $out, $match)) {
if (time() >= $match['1']) {
@unlink($filename);
unset ($out);
return false;
} else {
if ($this->layout === 'xml') {
header('Content-type: text/xml');
}
$out = str_replace('<!--cachetime:'.$match['1'].'-->', '', $out);
echo $out;
return true;
}
}
}
/**
* Returns a list of variables available in the current View context
*
* @return array
* @access public
*/
function getVars() {
return array_keys($this->viewVars);
}
/**
* Returns the contents of the given View variable(s)
*
* @return array
* @access public
*/
function getVar($var) {
if (!isset($this->viewVars[$var])) {
return null;
} else {
return $this->viewVars[$var];
}
}
/**
* Adds a script block or other element to be inserted in $scripts_for_layout in
* the <head /> of a document layout
*
* @param string $name
* @param string $content
* @access public
*/
function addScript($name, $content = null) {
if (empty($content)) {
if (!in_array($name, array_values($this->__scripts))) {
$this->__scripts[] = $name;
}
} else {
$this->__scripts[$name] = $content;
}
}
/**
* Generates a unique, non-random DOM ID for an object, based on the object type and the target URL.
*
* @param string $object Type of object, i.e. 'form' or 'link'
* @param string $url The object's target URL
* @return string
* @access public
*/
function uuid($object, $url) {
$c = 1;
$url = Router::url($url);
$hash = $object . substr(md5($object . $url), 0, 10);
while (in_array($hash, $this->uuids)) {
$hash = $object . substr(md5($object . $url . $c), 0, 10);
$c++;
}
$this->uuids[] = $hash;
return $hash;
}
/**
* Returns the entity reference of the current context as an array of identity parts
*
* @return array An array containing the identity elements of an entity
*/
function entity() {
return array_values(Set::filter(array(
ife($this->association, $this->association, $this->model),
$this->modelId, $this->field, $this->fieldSuffix
)));
}
/**
* Allows a template or element to set a variable that will be available in
* a layout or other element. Analagous to Controller::set.
*
* @param mixed $one A string or an array of data.
* @param mixed $two Value in case $one is a string (which then works as the key).
* Unused if $one is an associative array, otherwise serves as the values to $one's keys.
* @return unknown
*/
function set($one, $two = null) {
$data = null;
if (is_array($one)) {
if (is_array($two)) {
$data = array_combine($one, $two);
} else {
$data = $one;
}
} else {
$data = array($one => $two);
}
if ($data == null) {
return false;
}
foreach ($data as $name => $value) {
if ($name == 'title') {
$this->pageTitle = $value;
} else {
$this->viewVars[$name] = $value;
}
}
}
/**
* Displays an error page to the user. Uses layouts/error.ctp to render the page.
*
* @param integer $code HTTP Error code (for instance: 404)
* @param string $name Name of the error (for instance: Not Found)
* @param string $message Error message as a web page
*/
function error($code, $name, $message) {
header ("HTTP/1.1 {$code} {$name}");
print ($this->_render(
$this->_getLayoutFileName('error'),
array('code' => $code, 'name' => $name, 'message' => $message)
));
}
/**
* Renders and returns output for given view filename with its
* array of data.
*
* @param string $___viewFn Filename of the view
* @param array $___dataForView Data to include in rendered view
* @return string Rendered output
* @access protected
*/
function _render($___viewFn, $___dataForView, $loadHelpers = true, $cached = false) {
$loadedHelpers = array();
if ($this->helpers != false && $loadHelpers === true) {
$loadedHelpers = $this->_loadHelpers($loadedHelpers, $this->helpers);
foreach (array_keys($loadedHelpers) as $helper) {
$camelBackedHelper = Inflector::variable($helper);
${$camelBackedHelper} =& $loadedHelpers[$helper];
$this->loaded[$camelBackedHelper] =& ${$camelBackedHelper};
}
foreach ($loadedHelpers as $helper) {
if (is_object($helper)) {
if (is_subclass_of($helper, 'Helper') || is_subclass_of($helper, 'helper')) {
$helper->beforeRender();
}
}
}
}
extract($___dataForView, EXTR_SKIP);
ob_start();
if (Configure::read() > 0) {
include ($___viewFn);
} else {
@include ($___viewFn);
}
if (!empty($loadedHelpers)) {
foreach ($loadedHelpers as $helper) {
if (is_object($helper)) {
if (is_subclass_of($helper, 'Helper') || is_subclass_of($helper, 'helper')) {
$helper->afterRender();
}
}
}
}
$out = ob_get_clean();
if (isset($this->loaded['cache']) && (($this->cacheAction != false)) && (Configure::read('Cache.check') === true)) {
if (is_a($this->loaded['cache'], 'CacheHelper')) {
$cache =& $this->loaded['cache'];
if ($cached === true) {
$cache->view = &$this;
}
$cache->base = $this->base;
$cache->here = $this->here;
$cache->helpers = $this->helpers;
$cache->action = $this->action;
$cache->controllerName = $this->name;
$cache->layout = $this->layout;
$cache->cacheAction = $this->cacheAction;
$cache->cache($___viewFn, $out, $cached);
}
}
return $out;
}
/**
* Loads helpers, with their dependencies.
*
* @param array $loaded List of helpers that are already loaded.
* @param array $helpers List of helpers to load.
* @param string $parent holds name of helper, if loaded helper has helpers
* @return array
*/
function &_loadHelpers(&$loaded, $helpers, $parent = null) {
if (empty($loaded)) {
$helpers[] = 'Session';
}
foreach ($helpers as $i => $helper) {
$options = array();
if (!is_int($i)) {
$options = $helper;
$helper = $i;
}
$parts = preg_split('/\/|\./', $helper);
if (count($parts) === 1) {
$plugin = $this->plugin;
} else {
$plugin = Inflector::underscore($parts['0']);
$helper = $parts[count($parts) - 1];
}
$helperCn = $helper . 'Helper';
if (in_array($helper, array_keys($loaded)) !== true) {
if (!class_exists($helperCn)) {
if (is_null($plugin) || !App::import('Helper', $plugin . '.' . $helper)) {
if (!App::import('Helper', $helper)) {
$this->cakeError('missingHelperFile', array(array(
'helper' => $helper,
'file' => Inflector::underscore($helper) . '.php',
'base' => $this->base
)));
return false;
}
}
if (!class_exists($helperCn)) {
$this->cakeError('missingHelperClass', array(array(
'helper' => $helper,
'file' => Inflector::underscore($helper) . '.php',
'base' => $this->base
)));
return false;
}
}
$loaded[$helper] =& new $helperCn($options);
$vars = array('base', 'webroot', 'here', 'params', 'action', 'data', 'themeWeb', 'plugin');
$c = count($vars);
for ($j = 0; $j < $c; $j++) {
$loaded[$helper]->{$vars[$j]} = $this->{$vars[$j]};
}
if (!empty($this->validationErrors)) {
$loaded[$helper]->validationErrors = $this->validationErrors;
}
if (is_array($loaded[$helper]->helpers) && !empty($loaded[$helper]->helpers)) {
$loaded =& $this->_loadHelpers($loaded, $loaded[$helper]->helpers, $helper);
}
}
if (isset($loaded[$parent])) {
$loaded[$parent]->{$helper} =& $loaded[$helper];
}
}
return $loaded;
}
/**
* Returns filename of given action's template file (.ctp) as a string.
* CamelCased action names will be under_scored! This means that you can have
* LongActionNames that refer to long_action_names.ctp views.
*
* @param string $action Controller action to find template filename for
* @return string Template filename
* @access protected
*/
function _getViewFileName($name = null) {
$subDir = null;
if (!is_null($this->subDir)) {
$subDir = $this->subDir . DS;
}
if ($name === null) {
$name = $this->action;
}
$name = str_replace('/', DS, $name);
if (strpos($name, DS) === false && strpos($name, '..') === false) {
$name = $this->viewPath . DS . $subDir . Inflector::underscore($name);
} elseif (strpos($name, DS) !== false) {
if ($name{0} === DS || $name{1} === ':') {
if (is_file($name)) {
return $name;
}
$name = trim($name, DS);
} else {
$name = $this->viewPath . DS . $subDir . $name;
}
} elseif (strpos($name, '..') !== false) {
$name = explode('/', $name);
$i = array_search('..', $name);
unset($name[$i - 1]);
unset($name[$i]);
$name = '..' . DS . implode(DS, $name);
}
$paths = $this->_paths($this->plugin);
foreach ($paths as $path) {
if (file_exists($path . $name . $this->ext)) {
return $path . $name . $this->ext;
} elseif (file_exists($path . $name . '.ctp')) {
return $path . $name . '.ctp';
} elseif (file_exists($path . $name . '.thtml')) {
return $path . $name . '.thtml';
}
}
$defaultPath = $paths[0];
if ($this->plugin) {
$pluginPaths = Configure::read('pluginPaths');
foreach ($paths as $path) {
if (strpos($path, $pluginPaths[0]) === 0) {
$defaultPath = $path;
break;
}
}
}
return $this->_missingView($defaultPath . $name . $this->ext, 'missingView');
}
/**
* Returns layout filename for this template as a string.
*
* @return string Filename for layout file (.ctp).
* @access protected
*/
function _getLayoutFileName($name = null) {
if ($name === null) {
$name = $this->layout;
}
$subDir = null;
if (!is_null($this->layoutPath)) {
$subDir = $this->layoutPath . DS;
}
$paths = $this->_paths($this->plugin);
$file = 'layouts' . DS . $subDir . $name;
foreach ($paths as $path) {
if (file_exists($path . $file . $this->ext)) {
return $path . $file . $this->ext;
} elseif (file_exists($path . $name . '.ctp')) {
return $path . $file . '.ctp';
} elseif (file_exists($path . $file . '.thtml')) {
return $path . $file . '.thtml';
}
}
return $this->_missingView($paths[0] . $file . $this->ext, 'missingLayout');
}
/**
* Return a misssing view error message
*
* @param string $viewFileName the filename that should exist
* @return cakeError
*/
function _missingView($file, $error = 'missingView') {
if ($error === 'missingView') {
$this->cakeError('missingView', array(
'className' => $this->name,
'action' => $this->action,
'file' => $file,
'base' => $this->base
));
return false;
} elseif ($error === 'missingLayout') {
$this->cakeError('missingLayout', array(
'layout' => $this->layout,
'file' => $file,
'base' => $this->base
));
return false;
}
}
/**
* Return all possible paths to find view files in order
*
* @param string $plugin
* @return array paths
* @access protected
*/
function _paths($plugin = null, $cached = true) {
if ($plugin === null && $cached === true && !empty($this->__paths)) {
return $this->__paths;
}
$paths = array();
$viewPaths = Configure::read('viewPaths');
if ($plugin !== null) {
$count = count($viewPaths);
for ($i = 0; $i < $count; $i++) {
$paths[] = $viewPaths[$i] . 'plugins' . DS . $plugin . DS;
}
$pluginPaths = Configure::read('pluginPaths');
$count = count($pluginPaths);
for ($i = 0; $i < $count; $i++) {
$paths[] = $pluginPaths[$i] . $plugin . DS . 'views' . DS;
}
}
$paths = array_merge($paths, $viewPaths);
if (empty($this->__paths)) {
$this->__paths = $paths;
}
return $paths;
}
/**
* @deprecated
* @see View::element
*/
function renderElement($name, $params = array(), $loadHelpers = false) {
return $this->element($name, $params, $loadHelpers);
}
}
?>