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<?php
namespace dokuwiki\Parsing;
use dokuwiki\Debug\DebugHelper;
use Doku_Handler;
use dokuwiki\Parsing\Lexer\Lexer;
use dokuwiki\Parsing\ParserMode\Base;
use dokuwiki\Parsing\ParserMode\ModeInterface;
/**
* Sets up the Lexer with modes and points it to the Handler
* For an intro to the Lexer see: wiki:parser
*/
class Parser
{
/** @var Doku_Handler */
protected $handler;
/** @var Lexer $lexer */
protected $lexer;
/** @var ModeInterface[] $modes */
protected $modes = [];
/** @var bool mode connections may only be set up once */
protected $connected = false;
/**
* dokuwiki\Parsing\Doku_Parser constructor.
*
* @param Doku_Handler $handler
*/
public function __construct(Doku_Handler $handler)
{
$this->handler = $handler;
}
/**
* Adds the base mode and initialized the lexer
*
* @param Base $BaseMode
*/
protected function addBaseMode($BaseMode)
{
$this->modes['base'] = $BaseMode;
if (!$this->lexer) {
$this->lexer = new Lexer($this->handler, 'base', true);
}
$this->modes['base']->Lexer = $this->lexer;
}
/**
* Add a new syntax element (mode) to the parser
*
* PHP preserves order of associative elements
* Mode sequence is important
*
* @param string $name
* @param ModeInterface $Mode
*/
public function addMode($name, ModeInterface $Mode)
{
if (!isset($this->modes['base'])) {
$this->addBaseMode(new Base());
}
$Mode->Lexer = $this->lexer; // FIXME should be done by setter
$this->modes[$name] = $Mode;
}
/**
* Connect all modes with each other
*
* This is the last step before actually parsing.
*/
protected function connectModes()
{
if ($this->connected) {
return;
}
foreach (array_keys($this->modes) as $mode) {
// Base isn't connected to anything
if ($mode == 'base') {
continue;
}
$this->modes[$mode]->preConnect();
foreach (array_keys($this->modes) as $cm) {
if ($this->modes[$cm]->accepts($mode)) {
$this->modes[$mode]->connectTo($cm);
}
}
$this->modes[$mode]->postConnect();
}
$this->connected = true;
}
/**
* Parses wiki syntax to instructions
*
* @param string $doc the wiki syntax text
* @return array instructions
*/
public function parse($doc)
{
$this->connectModes();
// Normalize CRs and pad doc
$doc = "\n" . str_replace("\r\n", "\n", $doc) . "\n";
$this->lexer->parse($doc);
if (!method_exists($this->handler, 'finalize')) {
/** @deprecated 2019-10 we have a legacy handler from a plugin, assume legacy _finalize exists */
DebugHelper::dbgCustomDeprecationEvent(
'finalize()',
get_class($this->handler) . '::_finalize()',
__METHOD__,
__FILE__,
__LINE__
);
$this->handler->_finalize();
} else {
$this->handler->finalize();
}
return $this->handler->calls;
}
}
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