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|
<?php
namespace Smarty\Runtime;
use Smarty\Template;
/**
* Runtime Extension Capture
*
* @author Uwe Tews
*/
class CaptureRuntime {
/**
* Stack of capture parameter
*
* @var array
*/
private $captureStack = [];
/**
* Current open capture sections
*
* @var int
*/
private $captureCount = 0;
/**
* Count stack
*
* @var int[]
*/
private $countStack = [];
/**
* Named buffer
*
* @var string[]
*/
private $namedBuffer = [];
/**
* Open capture section
*
* @param \Smarty\Template $_template
* @param string $buffer capture name
* @param string $assign variable name
* @param string $append variable name
*/
public function open(Template $_template, $buffer, $assign, $append) {
$this->registerCallbacks($_template);
$this->captureStack[] = [
$buffer,
$assign,
$append,
];
$this->captureCount++;
ob_start();
}
/**
* Register callbacks in template class
*
* @param \Smarty\Template $_template
*/
private function registerCallbacks(Template $_template) {
foreach ($_template->startRenderCallbacks as $callback) {
if (is_array($callback) && get_class($callback[0]) == self::class) {
// already registered
return;
}
}
$_template->startRenderCallbacks[] = [
$this,
'startRender',
];
$_template->endRenderCallbacks[] = [
$this,
'endRender',
];
$this->startRender($_template);
}
/**
* Start render callback
*
* @param \Smarty\Template $_template
*/
public function startRender(Template $_template) {
$this->countStack[] = $this->captureCount;
$this->captureCount = 0;
}
/**
* Close capture section
*
* @param \Smarty\Template $_template
*
* @throws \Smarty\Exception
*/
public function close(Template $_template) {
if ($this->captureCount) {
[$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\Template $_template
*
* @throws \Smarty\Exception
*/
public function error(Template $_template) {
throw new \Smarty\Exception("Not matching {capture}{/capture} in '{$_template->template_resource}'");
}
/**
* Return content of named capture buffer by key or as array
*
* @param \Smarty\Template $_template
* @param string|null $name
*
* @return string|string[]|null
*/
public function getBuffer(Template $_template, $name = null) {
if (isset($name)) {
return $this->namedBuffer[$name] ?? null;
} else {
return $this->namedBuffer;
}
}
/**
* End render callback
*
* @param \Smarty\Template $_template
*
* @throws \Smarty\Exception
*/
public function endRender(Template $_template) {
if ($this->captureCount) {
$this->error($_template);
} else {
$this->captureCount = array_pop($this->countStack);
}
}
}
|
