Current File : //proc/1857783/root/var/www/tif-dev/wp-content/plugins/lazy-blocks/vendor/Handlebars/Handlebars.php
<?php
/**
* This file is part of Handlebars-php
* Based on mustache-php https://github.com/bobthecow/mustache.php
*
* PHP version 5.3
*
* @category Xamin
* @package Handlebars
* @author fzerorubigd <fzerorubigd@gmail.com>
* @author Behrooz Shabani <everplays@gmail.com>
* @author Jeff Turcotte <jeff.turcotte@gmail.com>
* @author Mária Šormanová <maria.sormanova@gmail.com>
* @copyright 2010-2012 (c) Justin Hileman
* @copyright 2012 (c) ParsPooyesh Co
* @copyright 2013 (c) Behrooz Shabani
* @license MIT <http://opensource.org/licenses/MIT>
* @version GIT: $Id$
* @link http://xamin.ir
*/
namespace Handlebars;
use Handlebars\Loader\StringLoader;
use Handlebars\Cache\Dummy;
/**
* Handlebars template engine, based on mustache.
*
* @category Xamin
* @package Handlebars
* @author fzerorubigd <fzerorubigd@gmail.com>
* @copyright 2012 (c) ParsPooyesh Co
* @license MIT <http://opensource.org/licenses/MIT>
* @version Release: @package_version@
* @link http://xamin.ir
*/
class Handlebars
{
private static $_instance = false;
const VERSION = '1.1.0';
/**
* Factory method
*
* @param array $options see __construct's options parameter
*
* @return Handlebars
*/
public static function factory($options = array())
{
if (self::$_instance === false) {
self::$_instance = new Handlebars($options);
}
return self::$_instance;
}
/**
* Current tokenizer instance
*
* @var Tokenizer
*/
private $_tokenizer;
/**
* Current parser instance
*
* @var Parser
*/
private $_parser;
/**
* Current helper list
*
* @var Helpers
*/
private $_helpers;
/**
* Current loader instance
*
* @var Loader
*/
private $_loader;
/**
* Current partial loader instance
*
* @var Loader
*/
private $_partialsLoader;
/**
* Current cache instance
*
* @var Cache
*/
private $_cache;
/**
* @var int time to live parameter in seconds for the cache usage
* default set to 0 which means that entries stay in cache
* forever and are never purged
*/
private $_ttl = 0;
/**
* @var string the class to use for the template
*/
private $_templateClass = 'Handlebars\\Template';
/**
* @var callable escape function to use
*/
private $_escape = 'htmlspecialchars';
/**
* Parameters for the escpae method above
*
* @var array parametes to pass to escape function
*/
private $_escapeArgs = array(
ENT_COMPAT,
'UTF-8'
);
private $_aliases = array();
/**
* Handlebars engine constructor
* $options array can contain :
* helpers => Helpers object
* escape => a callable function to escape values
* escapeArgs => array to pass as extra parameter to escape function
* loader => Loader object
* partials_loader => Loader object
* cache => Cache object
* template_class => the class to use for the template object
*
* @param array $options array of options to set
*
* @throws \InvalidArgumentException
*/
public function __construct(array $options = array())
{
if (isset($options['helpers'])) {
$this->setHelpers($options['helpers']);
}
if (isset($options['loader'])) {
$this->setLoader($options['loader']);
}
if (isset($options['partials_loader'])) {
$this->setPartialsLoader($options['partials_loader']);
}
if (isset($options['cache'])) {
$this->setCache($options['cache']);
}
if (isset($options['ttl'])) {
$this->setTtl($options['ttl']);
}
if (isset($options['template_class'])) {
$this->setTemplateClass($options['template_class']);
}
if (isset($options['escape'])) {
if (!is_callable($options['escape'])) {
throw new \InvalidArgumentException(
'Handlebars Constructor "escape" option must be callable'
);
}
$this->_escape = $options['escape'];
}
if (isset($options['escapeArgs'])) {
if (!is_array($options['escapeArgs'])) {
$options['escapeArgs'] = array($options['escapeArgs']);
}
$this->_escapeArgs = $options['escapeArgs'];
}
if (isset($options['partials_alias'])
&& is_array($options['partials_alias'])
) {
$this->_aliases = $options['partials_alias'];
}
}
/**
* Shortcut 'render' invocation.
*
* Equivalent to calling `$handlebars->loadTemplate($template)->render($data);`
*
* @param string $template template name
* @param mixed $data data to use as context
*
* @return string Rendered template
* @see Handlebars::loadTemplate
* @see Template::render
*/
public function render($template, $data)
{
return $this->loadTemplate($template)->render($data);
}
/**
* Set helpers for current enfine
*
* @param Helpers $helpers handlebars helper
*
* @return void
*/
public function setHelpers(Helpers $helpers)
{
$this->_helpers = $helpers;
}
/**
* Get helpers, or create new one if ther is no helper
*
* @return Helpers
*/
public function getHelpers()
{
if (!isset($this->_helpers)) {
$this->_helpers = new Helpers();
}
return $this->_helpers;
}
/**
* Add a new helper.
*
* @param string $name helper name
* @param mixed $helper helper callable
*
* @return void
*/
public function addHelper($name, $helper)
{
$this->getHelpers()->add($name, $helper);
}
/**
* Get a helper by name.
*
* @param string $name helper name
*
* @return callable Helper
*/
public function getHelper($name)
{
return $this->getHelpers()->__get($name);
}
/**
* Check whether this instance has a helper.
*
* @param string $name helper name
*
* @return boolean True if the helper is present
*/
public function hasHelper($name)
{
return $this->getHelpers()->has($name);
}
/**
* Add a new helper.
*
* @param string $name helper name
* @param mixed $helper helper callable
*
* @return void
*/
public function registerHelper($name, $helper)
{
$callback = function ($template, $context, $arg) use ($helper) {
$args = $template->parseArguments($arg);
$named = $template->parseNamedArguments($arg);
foreach ($args as $i => $arg) {
//if it's literally string
if ($arg instanceof BaseString) {
//we have no problems here
$args[$i] = (string) $arg;
continue;
}
//not sure what to do if it's not a string or StringWrapper
if (!is_string($arg)) {
continue;
}
//it's a variable and we need to figure out the value of it
$args[$i] = $context->get($arg);
}
//push the options
$args[] = array(
//special fields
'data' => array(
'index' => $context->get('@index'),
'key' => $context->get('@key'),
'first' => $context->get('@first'),
'last' => $context->get('@last')),
// Named arguments
'hash' => $named,
// A renderer for block helper
'fn' => function ($inContext = null) use ($context, $template) {
$defined = !!$inContext;
if (!$defined) {
$inContext = $context;
$inContext->push($inContext->last());
} else if (!$inContext instanceof Context) {
$inContext = new ChildContext($inContext);
$inContext->setParent($context);
}
$template->setStopToken('else');
$buffer = $template->render($inContext);
$template->setStopToken(false);
//what if it's a loop ?
$template->rewind();
//What's the point of this again?
//I mean in this context (literally)
//$template->discard($inContext);
if (!$defined) {
$inContext->pop();
}
return $buffer;
},
// A render for the else block
'inverse' => function ($inContext = null) use ($context, $template) {
$defined = !!$inContext;
if (!$defined) {
$inContext = $context;
$inContext->push($inContext->last());
} else if (!$inContext instanceof Context) {
$inContext = new ChildContext($inContext);
$inContext->setParent($context);
}
$template->setStopToken('else');
$template->discard($inContext);
$template->setStopToken(false);
$buffer = $template->render($inContext);
if (!$defined) {
$inContext->pop();
}
return $buffer;
},
// The current context.
'context' => $context,
// The current template
'template' => $template);
return call_user_func_array($helper, $args);
};
$this->addHelper($name, $callback);
}
/**
* Remove a helper by name.
*
* @param string $name helper name
*
* @return void
*/
public function removeHelper($name)
{
$this->getHelpers()->remove($name);
}
/**
* Set current loader
*
* @param Loader $loader handlebars loader
*
* @return void
*/
public function setLoader(Loader $loader)
{
$this->_loader = $loader;
}
/**
* Get current loader
*
* @return Loader
*/
public function getLoader()
{
if (!isset($this->_loader)) {
$this->_loader = new StringLoader();
}
return $this->_loader;
}
/**
* Set current partials loader
*
* @param Loader $loader handlebars loader
*
* @return void
*/
public function setPartialsLoader(Loader $loader)
{
$this->_partialsLoader = $loader;
}
/**
* Get current partials loader
*
* @return Loader
*/
public function getPartialsLoader()
{
if (!isset($this->_partialsLoader)) {
$this->_partialsLoader = new StringLoader();
}
return $this->_partialsLoader;
}
/**
* Set cache for current engine
*
* @param Cache $cache handlebars cache
*
* @return void
*/
public function setCache(Cache $cache)
{
$this->_cache = $cache;
}
/**
* Get cache
*
* @return Cache
*/
public function getCache()
{
if (!isset($this->_cache)) {
$this->_cache = new Dummy();
}
return $this->_cache;
}
/**
* Set time to live for the used cache
*
* @param int $ttl time to live in seconds
*
* @return void
*/
public function setTtl($ttl)
{
$this->_ttl = $ttl;
}
/**
* Get ttl
*
* @return int
*/
public function getTtl()
{
return $this->_ttl;
}
/**
* Get current escape function
*
* @return callable
*/
public function getEscape()
{
return $this->_escape;
}
/**
* Set current escape function
*
* @param callable $escape function
*
* @throws \InvalidArgumentException
* @return void
*/
public function setEscape($escape)
{
if (!is_callable($escape)) {
throw new \InvalidArgumentException(
'Escape function must be a callable'
);
}
$this->_escape = $escape;
}
/**
* Get current escape function
*
* @return array
*/
public function getEscapeArgs()
{
return $this->_escapeArgs;
}
/**
* Set current escape function
*
* @param array $escapeArgs arguments to pass as extra arg to function
*
* @return void
*/
public function setEscapeArgs($escapeArgs)
{
if (!is_array($escapeArgs)) {
$escapeArgs = array($escapeArgs);
}
$this->_escapeArgs = $escapeArgs;
}
/**
* Set the Handlebars Tokenizer instance.
*
* @param Tokenizer $tokenizer tokenizer
*
* @return void
*/
public function setTokenizer(Tokenizer $tokenizer)
{
$this->_tokenizer = $tokenizer;
}
/**
* Get the current Handlebars Tokenizer instance.
*
* If no Tokenizer instance has been explicitly specified, this method will
* instantiate and return a new one.
*
* @return Tokenizer
*/
public function getTokenizer()
{
if (!isset($this->_tokenizer)) {
$this->_tokenizer = new Tokenizer();
}
return $this->_tokenizer;
}
/**
* Set the Handlebars Parser instance.
*
* @param Parser $parser parser object
*
* @return void
*/
public function setParser(Parser $parser)
{
$this->_parser = $parser;
}
/**
* Get the current Handlebars Parser instance.
*
* If no Parser instance has been explicitly specified, this method will
* instantiate and return a new one.
*
* @return Parser
*/
public function getParser()
{
if (!isset($this->_parser)) {
$this->_parser = new Parser();
}
return $this->_parser;
}
/**
* Sets the class to use for the template object
*
* @param string $class the class name
*
* @return void
*/
public function setTemplateClass($class)
{
if (!is_a($class, 'Handlebars\\Template', true)) {
throw new \InvalidArgumentException(
sprintf(
'Custom template class "%s" must extend Template',
$class
)
);
}
$this->_templateClass = $class;
}
/**
* Load a template by name with current template loader
*
* @param string $name template name
*
* @return Template
*/
public function loadTemplate($name)
{
$source = $this->getLoader()->load($name);
$tree = $this->_tokenize($source);
return new $this->_templateClass($this, $tree, $source);
}
/**
* Load a partial by name with current partial loader
*
* @param string $name partial name
*
* @return Template
*/
public function loadPartial($name)
{
if (isset($this->_aliases[$name])) {
$name = $this->_aliases[$name];
}
$source = $this->getPartialsLoader()->load($name);
$tree = $this->_tokenize($source);
return new $this->_templateClass($this, $tree, $source);
}
/**
* Register partial alias
*
* @param string $alias Partial alias
* @param string $content The real value
*
* @return void
*/
public function registerPartial($alias, $content)
{
$this->_aliases[$alias] = $content;
}
/**
* Un-register partial alias
*
* @param string $alias Partial alias
*
* @return void
*/
public function unRegisterPartial($alias)
{
if (isset($this->_aliases[$alias])) {
unset($this->_aliases[$alias]);
}
}
/**
* Load string into a template object
*
* @param string $source string to load
*
* @return Template
*/
public function loadString($source)
{
$tree = $this->_tokenize($source);
return new $this->_templateClass($this, $tree, $source);
}
/**
* Try to tokenize source, or get them from cache if available
*
* @param string $source handlebars source code
*
* @return array handlebars parsed data into array
*/
private function _tokenize($source)
{
$hash = md5(sprintf('version: %s, data : %s', self::VERSION, $source));
$tree = $this->getCache()->get($hash);
if ($tree === false) {
$tokens = $this->getTokenizer()->scan($source);
$tree = $this->getParser()->parse($tokens);
$this->getCache()->set($hash, $tree, $this->_ttl);
}
return $tree;
}
}
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