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<?php
namespace Illuminate\View\Concerns;
use Illuminate\Support\HtmlString;
trait ManagesComponents
{
/**
* The components being rendered.
*
* @var array
*/
protected $componentStack = [];
/**
* The original data passed to the component.
*
* @var array
*/
protected $componentData = [];
/**
* The slot contents for the component.
*
* @var array
*/
protected $slots = [];
/**
* The names of the slots being rendered.
*
* @var array
*/
protected $slotStack = [];
/**
* Start a component rendering process.
*
* @param string $name
* @param array $data
* @return void
*/
public function startComponent($name, array $data = [])
{
if (ob_start()) {
$this->componentStack[] = $name;
$this->componentData[$this->currentComponent()] = $data;
$this->slots[$this->currentComponent()] = [];
}
}
/**
* Render the current component.
*
* @return string
*/
public function renderComponent()
{
$name = array_pop($this->componentStack);
return $this->make($name, $this->componentData($name))->render();
}
/**
* Get the data for the given component.
*
* @param string $name
* @return array
*/
protected function componentData($name)
{
return array_merge(
$this->componentData[count($this->componentStack)],
['slot' => new HtmlString(trim(ob_get_clean()))],
$this->slots[count($this->componentStack)]
);
}
/**
* Start the slot rendering process.
*
* @param string $name
* @param string|null $content
* @return void
*/
public function slot($name, $content = null)
{
if (func_num_args() === 2) {
$this->slots[$this->currentComponent()][$name] = $content;
} else {
if (ob_start()) {
$this->slots[$this->currentComponent()][$name] = '';
$this->slotStack[$this->currentComponent()][] = $name;
}
}
}
/**
* Save the slot content for rendering.
*
* @return void
*/
public function endSlot()
{
last($this->componentStack);
$currentSlot = array_pop(
$this->slotStack[$this->currentComponent()]
);
$this->slots[$this->currentComponent()]
[$currentSlot] = new HtmlString(trim(ob_get_clean()));
}
/**
* Get the index for the current component.
*
* @return int
*/
protected function currentComponent()
{
return count($this->componentStack) - 1;
}
}
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