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<?php
/**
* PHPTAL templating engine
*
* PHP Version 5
*
* @category HTML
* @package PHPTAL
* @author Laurent Bedubourg <lbedubourg@motion-twin.com>
* @author Kornel Lesiński <kornel@aardvarkmedia.co.uk>
* @license http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License
* @version SVN: $Id$
* @link http://phptal.org/
*/
/** TAL Specifications 1.4
*
* argument ::= (['text'] | 'structure') expression
*
* Example:
*
* <p tal:content="user/name">Fred Farkas</p>
*
*
*
*
* @package PHPTAL
* @subpackage Php.attribute.tal
* @author Laurent Bedubourg <lbedubourg@motion-twin.com>
*/
class PHPTAL_Php_Attribute_TAL_Content
extends PHPTAL_Php_Attribute
implements PHPTAL_Php_TalesChainReader
{
public function before(PHPTAL_Php_CodeWriter $codewriter)
{
$expression = $this->extractEchoType($this->expression);
$code = $codewriter->evaluateExpression($expression);
if (is_array($code)) {
return $this->generateChainedContent($codewriter, $code);
}
if ($code == PHPTAL_Php_TalesInternal::NOTHING_KEYWORD) {
return;
}
if ($code == PHPTAL_Php_TalesInternal::DEFAULT_KEYWORD) {
return $this->generateDefault($codewriter);
}
$this->doEchoAttribute($codewriter, $code);
}
public function after(PHPTAL_Php_CodeWriter $codewriter)
{
}
private function generateDefault(PHPTAL_Php_CodeWriter $codewriter)
{
$this->phpelement->generateContent($codewriter, true);
}
protected function generateChainedContent(PHPTAL_Php_CodeWriter $codewriter, $code)
{
$executor = new PHPTAL_Php_TalesChainExecutor($codewriter, $code, $this);
}
public function talesChainPart(PHPTAL_Php_TalesChainExecutor $executor, $exp, $islast)
{
if (!$islast) {
$var = $executor->getCodeWriter()->createTempVariable();
$executor->doIf('!phptal_isempty('.$var.' = '.$exp.')');
$this->doEchoAttribute($executor->getCodeWriter(), $var);
$executor->getCodeWriter()->recycleTempVariable($var);
} else {
$executor->doElse();
$this->doEchoAttribute($executor->getCodeWriter(), $exp);
}
}
public function talesChainNothingKeyword(PHPTAL_Php_TalesChainExecutor $executor)
{
$executor->breakChain();
}
public function talesChainDefaultKeyword(PHPTAL_Php_TalesChainExecutor $executor)
{
$executor->doElse();
$this->generateDefault($executor->getCodeWriter());
$executor->breakChain();
}
}
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