Viewing file:  BladeSourceMapCompiler.php (4.42 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
namespace Spatie\LaravelIgnition\Views;
use Illuminate\View\Compilers\BladeCompiler;
use Throwable;
class BladeSourceMapCompiler
{
protected BladeCompiler $bladeCompiler;
public function __construct()
{
$this->bladeCompiler = app('blade.compiler');
}
public function detectLineNumber(string $filename, int $compiledLineNumber): int
{
$map = $this->compileSourcemap((string)file_get_contents($filename));
return $this->findClosestLineNumberMapping($map, $compiledLineNumber);
}
protected function compileSourcemap(string $value): string
{
try {
$value = $this->addEchoLineNumbers($value);
$value = $this->addStatementLineNumbers($value);
$value = $this->addBladeComponentLineNumbers($value);
$value = $this->bladeCompiler->compileString($value);
return $this->trimEmptyLines($value);
} catch (Throwable $e) {
report($e);
return $value;
}
}
protected function addEchoLineNumbers(string $value): string
{
$echoPairs = [['{{', '}}'], ['{{{', '}}}'], ['{!!', '!!}']];
foreach ($echoPairs as $pair) {
// Matches {{ $value }}, {!! $value !!} and {{{ $value }}} depending on $pair
$pattern = sprintf('/(@)?%s\s*(.+?)\s*%s(\r?\n)?/s', $pair[0], $pair[1]);
if (preg_match_all($pattern, $value, $matches, PREG_OFFSET_CAPTURE)) {
foreach (array_reverse($matches[0]) as $match) {
$position = mb_strlen(substr($value, 0, $match[1]));
$value = $this->insertLineNumberAtPosition($position, $value);
}
}
}
return $value;
}
protected function addStatementLineNumbers(string $value): string
{
// Matches @bladeStatements() like @if, @component(...), @etc;
$shouldInsertLineNumbers = preg_match_all(
'/\B@(@?\w+(?:::\w+)?)([ \t]*)(\( ( (?>[^()]+) | (?3) )* \))?/x',
$value,
$matches,
PREG_OFFSET_CAPTURE
);
if ($shouldInsertLineNumbers) {
foreach (array_reverse($matches[0]) as $match) {
$position = mb_strlen(substr($value, 0, $match[1]));
$value = $this->insertLineNumberAtPosition($position, $value);
}
}
return $value;
}
protected function addBladeComponentLineNumbers(string $value): string
{
// Matches the start of `<x-blade-component`
$shouldInsertLineNumbers = preg_match_all(
'/<\s*x[-:]([\w\-:.]*)/mx',
$value,
$matches,
PREG_OFFSET_CAPTURE
);
if ($shouldInsertLineNumbers) {
foreach (array_reverse($matches[0]) as $match) {
$position = mb_strlen(substr($value, 0, $match[1]));
$value = $this->insertLineNumberAtPosition($position, $value);
}
}
return $value;
}
protected function insertLineNumberAtPosition(int $position, string $value): string
{
$before = mb_substr($value, 0, $position);
$lineNumber = count(explode("\n", $before));
return mb_substr($value, 0, $position)."|---LINE:{$lineNumber}---|".mb_substr($value, $position);
}
protected function trimEmptyLines(string $value): string
{
$value = preg_replace('/^\|---LINE:([0-9]+)---\|$/m', '', $value);
return ltrim((string)$value, PHP_EOL);
}
protected function findClosestLineNumberMapping(string $map, int $compiledLineNumber): int
{
$map = explode("\n", $map);
// Max 20 lines between compiled and source line number.
// Blade components can span multiple lines and the compiled line number is often
// a couple lines below the source-mapped `<x-component>` code.
$maxDistance = 20;
$pattern = '/\|---LINE:(?P<line>[0-9]+)---\|/m';
$lineNumberToCheck = $compiledLineNumber - 1;
while (true) {
if ($lineNumberToCheck < $compiledLineNumber - $maxDistance) {
// Something wrong. Return the $compiledLineNumber (unless it's out of range)
return min($compiledLineNumber, count($map));
}
if (preg_match($pattern, $map[$lineNumberToCheck] ?? '', $matches)) {
return (int)$matches['line'];
}
$lineNumberToCheck--;
}
}
}
|