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<?php
/**
* Runtime Extension Capture
*
* @package Smarty
* @subpackage PluginsInternal
* @author Uwe Tews
*/
class Smarty_Internal_Runtime_Capture
{
/**
* Flag that this instance will not be cached
*
* @var bool
*/
public $isPrivateExtension = true;
/**
* Stack of capture parameter
*
* @var array
*/
private $captureStack = array();
/**
* Current open capture sections
*
* @var int
*/
private $captureCount = 0;
/**
* Count stack
*
* @var int[]
*/
private $countStack = array();
/**
* Named buffer
*
* @var string[]
*/
private $namedBuffer = array();
/**
* Flag if callbacks are registered
*
* @var bool
*/
private $isRegistered = false;
/**
* Open capture section
*
* @param \Smarty_Internal_Template $_template
* @param string $buffer capture name
* @param string $assign variable name
* @param string $append variable name
*/
public function open(Smarty_Internal_Template $_template, $buffer, $assign, $append)
{
if (!$this->isRegistered) {
$this->register($_template);
}
$this->captureStack[] = array($buffer, $assign, $append);
$this->captureCount ++;
ob_start();
}
/**
* Register callbacks in template class
*
* @param \Smarty_Internal_Template $_template
*/
private function register(Smarty_Internal_Template $_template)
{
$_template->startRenderCallbacks[] = array($this, 'startRender');
$_template->endRenderCallbacks[] = array($this, 'endRender');
$this->startRender($_template);
$this->isRegistered = true;
}
/**
* Start render callback
*
* @param \Smarty_Internal_Template $_template
*/
public function startRender(Smarty_Internal_Template $_template)
{
$this->countStack[] = $this->captureCount;
$this->captureCount = 0;
}
/**
* Close capture section
*
* @param \Smarty_Internal_Template $_template
*
* @throws \SmartyException
*/
public function close(Smarty_Internal_Template $_template)
{
if ($this->captureCount) {
list($buffer, $assign, $append) = array_pop($this->captureStack);
$this->captureCount --;
if (isset($assign)) {
$_template->assign($assign, ob_get_contents());
}
if (isset($append)) {
$_template->append($append, ob_get_contents());
}
$this->namedBuffer[ $buffer ] = ob_get_clean();
} else {
$this->error($_template);
}
}
/**
* Error exception on not matching {capture}{/capture}
*
* @param \Smarty_Internal_Template $_template
*
* @throws \SmartyException
*/
public function error(Smarty_Internal_Template $_template)
{
throw new SmartyException("Not matching {capture}{/capture} in \"{$_template->template_resource}\"");
}
/**
* Return content of named capture buffer
*
* @param \Smarty_Internal_Template $_template
* @param $name
*
* @return null
*/
public function getBuffer(Smarty_Internal_Template $_template, $name)
{
return isset($this->namedBuffer[ $name ]) ? $this->namedBuffer[ $name ] : null;
}
/**
* End render callback
*
* @param \Smarty_Internal_Template $_template
*
* @throws \SmartyException
*/
public function endRender(Smarty_Internal_Template $_template)
{
if ($this->captureCount) {
$this->error($_template);
} else {
$this->captureCount = array_pop($this->countStack);
}
}
}
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