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<?php |
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/** |
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* Spiral Framework. |
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* |
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* @license MIT |
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* @author Anton Titov (Wolfy-J) |
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*/ |
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declare(strict_types=1); |
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namespace Spiral\Stempler\Compiler; |
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use Spiral\Stempler\Loader\LoaderInterface; |
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use Spiral\Stempler\Loader\Source; |
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/** |
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* Stores and resolves offsets and line numbers between templates. |
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*/ |
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final class SourceMap |
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{ |
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/** @var array */ |
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private $paths = []; |
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/** @var array */ |
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private $lines = []; |
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/** @var Source[] */ |
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private $sourceCache = null; |
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/** |
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* @return array |
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*/ |
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public function __serialize(): array |
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{ |
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return [ |
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'paths' => $this->paths, |
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'lines' => $this->lines, |
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]; |
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} |
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/** |
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* @param array $data |
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*/ |
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public function __unserialize(array $data): void |
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{ |
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$this->paths = $data['paths']; |
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$this->lines = $data['lines']; |
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} |
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/** |
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* Get all template paths involved in final template. |
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* |
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* @return array |
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*/ |
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public function getPaths(): array |
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{ |
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$paths = []; |
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// We can scan top level only |
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/** @var Location $loc */ |
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foreach ($this->lines as $line) { |
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if (!in_array($this->paths[$line[0]], $paths, true)) { |
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$paths[] = $this->paths[$line[0]]; |
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} |
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} |
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return $paths; |
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} |
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/** |
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* Calculate the location of all closest nodes based on a line number in generated source. Recursive until top root |
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* template. |
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* |
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* @param int $line |
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* @return array |
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*/ |
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public function getStack(int $line): array |
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{ |
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$found = null; |
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foreach ($this->lines as $linen => $ctx) { |
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if ($linen <= $line) { |
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$found = $ctx; |
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} |
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} |
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if ($found === null) { |
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return []; |
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} |
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$result = []; |
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$this->unpack($result, $found); |
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return $result; |
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} |
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/** |
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* Compress. |
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* |
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* @return false|string |
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*/ |
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public function serialize() |
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{ |
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return json_encode($this->__serialize()); |
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} |
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/** |
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* @param string $serialized |
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*/ |
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public function unserialize($serialized): void |
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{ |
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$this->__unserialize(json_decode($serialized, true)); |
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} |
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/** |
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* @param string $content |
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* @param array $locations |
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* @param LoaderInterface $loader |
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* @return SourceMap |
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*/ |
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public static function calculate(string $content, array $locations, LoaderInterface $loader): SourceMap |
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{ |
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$map = new self(); |
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foreach ($locations as $offset => $location) { |
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$line = Source::resolveLine($content, $offset); |
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if (!isset($map->lines[$line])) { |
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$map->lines[$line] = $map->calculateLine($location, $loader); |
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} |
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} |
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$map->sourceCache = null; |
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return $map; |
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} |
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/** |
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* @param array $result |
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* @param array $line |
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*/ |
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private function unpack(array &$result, array $line): void |
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{ |
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$result[] = [ |
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'file' => $this->paths[$line[0]], |
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'line' => $line[1], |
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]; |
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if ($line[2] !== null) { |
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$this->unpack($result, $line[2]); |
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} |
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} |
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/** |
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* @param Location $location |
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* @param LoaderInterface $loader |
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* @return array |
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*/ |
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private function calculateLine(Location $location, LoaderInterface $loader): array |
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{ |
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if (!isset($this->sourceCache[$location->path])) { |
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$this->sourceCache[$location->path] = $loader->load($location->path); |
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} |
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$path = $this->sourceCache[$location->path]->getFilename(); |
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if (!in_array($path, $this->paths, true)) { |
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$this->paths[] = $path; |
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} |
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return [ |
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array_search($path, $this->paths), |
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Source::resolveLine($this->sourceCache[$location->path]->getContent(), $location->offset), |
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$location->parent === null ? null : $this->calculateLine($location->parent, $loader), |
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]; |
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} |
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} |
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spiral /
framework
