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- <?php
-
- /*
- * This file is part of Twig.
- *
- * (c) 2009 Fabien Potencier
- * (c) 2009 Armin Ronacher
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
- /**
- * Compiles a node to PHP code.
- *
- * @author Fabien Potencier <fabien@symfony.com>
- */
- class Twig_Compiler implements Twig_CompilerInterface
- {
- protected $lastLine;
- protected $source;
- protected $indentation;
- protected $env;
- protected $debugInfo;
- protected $sourceOffset;
- protected $sourceLine;
- protected $filename;
-
- /**
- * Constructor.
- *
- * @param Twig_Environment $env The twig environment instance
- */
- public function __construct(Twig_Environment $env)
- {
- $this->env = $env;
- $this->debugInfo = array();
- }
-
- public function getFilename()
- {
- return $this->filename;
- }
-
- /**
- * Returns the environment instance related to this compiler.
- *
- * @return Twig_Environment The environment instance
- */
- public function getEnvironment()
- {
- return $this->env;
- }
-
- /**
- * Gets the current PHP code after compilation.
- *
- * @return string The PHP code
- */
- public function getSource()
- {
- return $this->source;
- }
-
- /**
- * Compiles a node.
- *
- * @param Twig_NodeInterface $node The node to compile
- * @param integer $indentation The current indentation
- *
- * @return Twig_Compiler The current compiler instance
- */
- public function compile(Twig_NodeInterface $node, $indentation = 0)
- {
- $this->lastLine = null;
- $this->source = '';
- $this->sourceOffset = 0;
- // source code starts at 1 (as we then increment it when we encounter new lines)
- $this->sourceLine = 1;
- $this->indentation = $indentation;
-
- if ($node instanceof Twig_Node_Module) {
- $this->filename = $node->getAttribute('filename');
- }
-
- $node->compile($this);
-
- return $this;
- }
-
- public function subcompile(Twig_NodeInterface $node, $raw = true)
- {
- if (false === $raw) {
- $this->addIndentation();
- }
-
- $node->compile($this);
-
- return $this;
- }
-
- /**
- * Adds a raw string to the compiled code.
- *
- * @param string $string The string
- *
- * @return Twig_Compiler The current compiler instance
- */
- public function raw($string)
- {
- $this->source .= $string;
-
- return $this;
- }
-
- /**
- * Writes a string to the compiled code by adding indentation.
- *
- * @return Twig_Compiler The current compiler instance
- */
- public function write()
- {
- $strings = func_get_args();
- foreach ($strings as $string) {
- $this->addIndentation();
- $this->source .= $string;
- }
-
- return $this;
- }
-
- /**
- * Appends an indentation to the current PHP code after compilation.
- *
- * @return Twig_Compiler The current compiler instance
- */
- public function addIndentation()
- {
- $this->source .= str_repeat(' ', $this->indentation * 4);
-
- return $this;
- }
-
- /**
- * Adds a quoted string to the compiled code.
- *
- * @param string $value The string
- *
- * @return Twig_Compiler The current compiler instance
- */
- public function string($value)
- {
- $this->source .= sprintf('"%s"', addcslashes($value, "\0\t\"\$\\"));
-
- return $this;
- }
-
- /**
- * Returns a PHP representation of a given value.
- *
- * @param mixed $value The value to convert
- *
- * @return Twig_Compiler The current compiler instance
- */
- public function repr($value)
- {
- if (is_int($value) || is_float($value)) {
- if (false !== $locale = setlocale(LC_NUMERIC, 0)) {
- setlocale(LC_NUMERIC, 'C');
- }
-
- $this->raw($value);
-
- if (false !== $locale) {
- setlocale(LC_NUMERIC, $locale);
- }
- } elseif (null === $value) {
- $this->raw('null');
- } elseif (is_bool($value)) {
- $this->raw($value ? 'true' : 'false');
- } elseif (is_array($value)) {
- $this->raw('array(');
- $first = true;
- foreach ($value as $key => $value) {
- if (!$first) {
- $this->raw(', ');
- }
- $first = false;
- $this->repr($key);
- $this->raw(' => ');
- $this->repr($value);
- }
- $this->raw(')');
- } else {
- $this->string($value);
- }
-
- return $this;
- }
-
- /**
- * Adds debugging information.
- *
- * @param Twig_NodeInterface $node The related twig node
- *
- * @return Twig_Compiler The current compiler instance
- */
- public function addDebugInfo(Twig_NodeInterface $node)
- {
- if ($node->getLine() != $this->lastLine) {
- $this->write("// line {$node->getLine()}\n");
-
- // when mbstring.func_overload is set to 2
- // mb_substr_count() replaces substr_count()
- // but they have different signatures!
- if (((int) ini_get('mbstring.func_overload')) & 2) {
- // this is much slower than the "right" version
- $this->sourceLine += mb_substr_count(mb_substr($this->source, $this->sourceOffset), "\n");
- } else {
- $this->sourceLine += substr_count($this->source, "\n", $this->sourceOffset);
- }
- $this->sourceOffset = strlen($this->source);
- $this->debugInfo[$this->sourceLine] = $node->getLine();
-
- $this->lastLine = $node->getLine();
- }
-
- return $this;
- }
-
- public function getDebugInfo()
- {
- return $this->debugInfo;
- }
-
- /**
- * Indents the generated code.
- *
- * @param integer $step The number of indentation to add
- *
- * @return Twig_Compiler The current compiler instance
- */
- public function indent($step = 1)
- {
- $this->indentation += $step;
-
- return $this;
- }
-
- /**
- * Outdents the generated code.
- *
- * @param integer $step The number of indentation to remove
- *
- * @return Twig_Compiler The current compiler instance
- *
- * @throws LogicException When trying to outdent too much so the indentation would become negative
- */
- public function outdent($step = 1)
- {
- // can't outdent by more steps than the current indentation level
- if ($this->indentation < $step) {
- throw new LogicException('Unable to call outdent() as the indentation would become negative');
- }
-
- $this->indentation -= $step;
-
- return $this;
- }
- }