Viewing file:  CompilesEchos.php (4.34 KB) -rw-r--r--
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<?php
namespace Illuminate\View\Compilers\Concerns;
use Closure;
use Illuminate\Support\Str;
trait CompilesEchos
{
/**
* Custom rendering callbacks for stringable objects.
*
* @var array
*/
protected $echoHandlers = [];
/**
* Add a handler to be executed before echoing a given class.
*
* @param string|callable $class
* @param callable|null $handler
* @return void
*/
public function stringable($class, $handler = null)
{
if ($class instanceof Closure) {
[$class, $handler] = [$this->firstClosureParameterType($class), $class];
}
$this->echoHandlers[$class] = $handler;
}
/**
* Compile Blade echos into valid PHP.
*
* @param string $value
* @return string
*/
public function compileEchos($value)
{
foreach ($this->getEchoMethods() as $method) {
$value = $this->$method($value);
}
return $value;
}
/**
* Get the echo methods in the proper order for compilation.
*
* @return array
*/
protected function getEchoMethods()
{
return [
'compileRawEchos',
'compileEscapedEchos',
'compileRegularEchos',
];
}
/**
* Compile the "raw" echo statements.
*
* @param string $value
* @return string
*/
protected function compileRawEchos($value)
{
$pattern = sprintf('/(@)?%s\s*(.+?)\s*%s(\r?\n)?/s', $this->rawTags[0], $this->rawTags[1]);
$callback = function ($matches) {
$whitespace = empty($matches[3]) ? '' : $matches[3].$matches[3];
return $matches[1]
? substr($matches[0], 1)
: "<?php echo {$this->wrapInEchoHandler($matches[2])}; ?>{$whitespace}";
};
return preg_replace_callback($pattern, $callback, $value);
}
/**
* Compile the "regular" echo statements.
*
* @param string $value
* @return string
*/
protected function compileRegularEchos($value)
{
$pattern = sprintf('/(@)?%s\s*(.+?)\s*%s(\r?\n)?/s', $this->contentTags[0], $this->contentTags[1]);
$callback = function ($matches) {
$whitespace = empty($matches[3]) ? '' : $matches[3].$matches[3];
$wrapped = sprintf($this->echoFormat, $this->wrapInEchoHandler($matches[2]));
return $matches[1] ? substr($matches[0], 1) : "<?php echo {$wrapped}; ?>{$whitespace}";
};
return preg_replace_callback($pattern, $callback, $value);
}
/**
* Compile the escaped echo statements.
*
* @param string $value
* @return string
*/
protected function compileEscapedEchos($value)
{
$pattern = sprintf('/(@)?%s\s*(.+?)\s*%s(\r?\n)?/s', $this->escapedTags[0], $this->escapedTags[1]);
$callback = function ($matches) {
$whitespace = empty($matches[3]) ? '' : $matches[3].$matches[3];
return $matches[1]
? $matches[0]
: "<?php echo e({$this->wrapInEchoHandler($matches[2])}); ?>{$whitespace}";
};
return preg_replace_callback($pattern, $callback, $value);
}
/**
* Add an instance of the blade echo handler to the start of the compiled string.
*
* @param string $result
* @return string
*/
protected function addBladeCompilerVariable($result)
{
return "<?php \$__bladeCompiler = app('blade.compiler'); ?>".$result;
}
/**
* Wrap the echoable value in an echo handler if applicable.
*
* @param string $value
* @return string
*/
protected function wrapInEchoHandler($value)
{
$value = Str::of($value)
->trim()
->when(str_ends_with($value, ';'), function ($str) {
return $str->beforeLast(';');
});
return empty($this->echoHandlers) ? $value : '$__bladeCompiler->applyEchoHandler('.$value.')';
}
/**
* Apply the echo handler for the value if it exists.
*
* @param string $value
* @return string
*/
public function applyEchoHandler($value)
{
if (is_object($value) && isset($this->echoHandlers[get_class($value)])) {
return call_user_func($this->echoHandlers[get_class($value)], $value);
}
return $value;
}
}
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