/**
* The compilation launcher. It executes the proper compilation steps
* according to the inheritance rules etc.
*
* @param String $code The source code to be compiled.
* @param String $filename The source template filename.
* @param String $compiledFilename The output template filename.
* @param Int $mode The compilation mode.
*/
public function compile($code, $filename, $compiledFilename, $mode)
{
$manager = $this->getCdfManager();
// Initialize the context.
$this->_contextStack->push(new Opt_Compiler_Context($this, Opt_Compiler_Context::TEMPLATE_CTX, $filename));
try {
// First, we select a parser.
if (!isset($this->_parsers[$mode])) {
$this->_parsers[$mode] = new $mode();
if (!$this->_parsers[$mode] instanceof Opt_Parser_Interface) {
throw new Opt_InvalidParser_Exception($mode);
}
}
$parser = $this->_parsers[$mode];
$parser->setCompiler($this);
// We cannot compile two templates at the same time
if (!is_null($this->_template)) {
throw new Opt_CompilerLocked_Exception($filename, $this->_template);
}
// Detecting recursive inclusion
if (is_null(self::$_recursionDetector)) {
self::$_recursionDetector = array(0 => $filename);
$weFree = true;
} else {
if (in_array($filename, self::$_recursionDetector)) {
$exception = new Opt_CompilerRecursion_Exception($filename);
$exception->setData(self::$_recursionDetector);
throw $exception;
}
self::$_recursionDetector[] = $filename;
$weFree = false;
}
// Cleaning up the processors
foreach ($this->_processors as $proc) {
$proc->reset();
}
// Initializing the template launcher
$this->set('template', $this->_template = $filename);
$this->set('mode', $mode);
$this->set('currentTemplate', $this->_template);
array_push(self::$_templates, $filename);
$this->_stack = new SplStack();
$i = 0;
$extend = $filename;
$memory = 0;
// The inheritance loop
do {
// Stage 1 - code compilation
if ($this->_tpl->debugConsole) {
$initial = memory_get_usage();
$tree = $parser->parse($extend, $code);
// Migration stage - only if backwards compatibility is on
if ($this->_tpl->backwardCompatibility) {
$tree = $this->_migrate($tree);
}
// Stage 2 - PHP tree processing
$this->_stack = null;
$this->_stage2($tree);
$this->set('escape', NULL);
unset($this->_stack);
$memory += memory_get_usage() - $initial;
unset($code);
} else {
$tree = $parser->parse($extend, $code);
unset($code);
// Migration stage - only if backward compatibility is on
if ($this->_tpl->backwardCompatibility) {
$this->_migrate($tree);
}
// Stage 2 - PHP tree processing
$this->_stack = array();
$this->_stage2($tree);
$this->set('escape', NULL);
unset($this->_stack);
}
// if the template extends something, load it and also process
if (isset($extend) && $extend != $filename) {
$this->addDependantTemplate($extend);
}
if (!is_null($snippet = $tree->get('snippet'))) {
$tree->dispose();
unset($tree);
// Change the specified snippet into a root node.
$tree = new Opt_Xml_Root();
$attribute = new Opt_Xml_Attribute('opt:use', $snippet);
$this->processor('snippet')->processAttribute($tree, $attribute);
$this->processor('snippet')->postprocessAttribute($tree, $attribute);
$this->_stage2($tree, true);
break;
}
if (!is_null($extend = $tree->get('extend'))) {
$tree->dispose();
unset($tree);
$this->set('currentTemplate', $extend);
array_pop(self::$_templates);
array_push(self::$_templates, $extend);
$code = $this->_tpl->_getSource($extend);
}
$i++;
} while (!is_null($extend));
// There are some dependant templates. We must add a suitable PHP code
// to the output.
if (sizeof($this->_dependencies) > 0) {
$this->_addDependencies($tree);
}
if ($this->_tpl->debugConsole) {
Opt_Support::addCompiledTemplate($this->_template, $memory);
}
// Stage 3 - linking the last tree
if (!is_null($compiledFilename)) {
$this->_output = '';
$this->_newQueue = null;
$this->_dynamicBlocks = array();
$this->_stage3($output, $tree);
$tree->dispose();
unset($tree);
$this->_output = str_replace('?><' . '?php', '', $this->_output);
// Build the directories, if needed.
if (($pos = strrpos($compiledFilename, '/')) !== false) {
$path = $this->_tpl->compileDir . substr($compiledFilename, 0, $pos);
if (!is_dir($path)) {
mkdir($path, 0750, true);
}
}
// Save the file
if (sizeof($this->_dynamicBlocks) > 0) {
file_put_contents($this->_tpl->compileDir . $compiledFilename . '.dyn', serialize($this->_dynamicBlocks));
}
file_put_contents($this->_tpl->compileDir . $compiledFilename, $this->_output);
$this->_output = '';
$this->_dynamicBlocks = null;
} else {
$tree->dispose();
}
array_pop(self::$_templates);
$this->_inheritance = array();
if ($weFree) {
// Do the cleanup.
$this->_dependencies = array();
self::$_recursionDetector = NULL;
foreach ($this->_processors as $processor) {
$processor->reset();
}
}
$this->_template = NULL;
$manager->clearLocals();
// Free the context.
while ($this->_contextStack->count() > 0) {
$ctx = $this->_contextStack->pop();
$ctx->dispose();
}
// Run the new garbage collector, if it is available.
/* if(version_compare(PHP_VERSION, '5.3.0', '>='))
{
gc_collect_cycles();
}*/
} catch (Exception $e) {
// Free the context
while ($this->_contextStack->count() > 0) {
$ctx = $this->_contextStack->pop();
$ctx->dispose();
}
// Free the memory
if (isset($tree)) {
$tree->dispose();
}
// Clean the compiler state in case of exception
$this->_template = NULL;
$this->_dependencies = array();
self::$_recursionDetector = NULL;
foreach ($this->_processors as $processor) {
$processor->reset();
}
$manager->clearLocals();
// And throw it forward.
throw $e;
}
}