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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: Repeat.php 671 2009-07-11 18:11:35Z kornel $
* @link http://phptal.org/
*/
/**
* TAL Specifications 1.4
*
* argument ::= variable_name expression
* variable_name ::= Name
*
* Example:
*
* <p tal:repeat="txt python:'one', 'two', 'three'">
* <span tal:replace="txt" />
* </p>
* <table>
* <tr tal:repeat="item here/cart">
* <td tal:content="repeat/item/index">1</td>
* <td tal:content="item/description">Widget</td>
* <td tal:content="item/price">$1.50</td>
* </tr>
* </table>
*
* The following information is available from an Iterator:
*
* * index - repetition number, starting from zero.
* * number - repetition number, starting from one.
* * even - true for even-indexed repetitions (0, 2, 4, ...).
* * odd - true for odd-indexed repetitions (1, 3, 5, ...).
* * start - true for the starting repetition (index 0).
* * end - true for the ending, or final, repetition.
* * length - length of the sequence, which will be the total number of repetitions.
*
* * letter - count reps with lower-case letters: "a" - "z", "aa" - "az", "ba" - "bz", ..., "za" - "zz", "aaa" - "aaz", and so forth.
* * Letter - upper-case version of letter.
* * roman - count reps with lower-case roman numerals: "i", "ii", "iii", "iv", "v", "vi" ...
* * Roman - upper-case version of roman numerals.
* * first - true for the first item in a group - see note below
* * lasst - true for the last item in a group - see note below
*
* Note: first and last are intended for use with sorted sequences. They try to
* divide the sequence into group of items with the same value. If you provide
* a path, then the value obtained by following that path from a sequence item
* is used for grouping, otherwise the value of the item is used. You can
* provide the path by appending it to the path from the repeat variable,
* as in "repeat/item/first/color".
*
* PHPTAL: index, number, even, etc... will be stored in the
* $ctx->repeat->'item' object. Thus $ctx->repeat->item->odd
*
*
*
*
* @package PHPTAL
* @subpackage Php.attribute.tal
* @author Laurent Bedubourg <lbedubourg@motion-twin.com>
*/
class PHPTAL_Php_Attribute_TAL_Repeat extends PHPTAL_Php_Attribute
{
private $var;
public function before(PHPTAL_Php_CodeWriter $codewriter)
{
$this->var = $codewriter->createTempVariable();
// alias to repeats handler to avoid calling extra getters on each variable access
$codewriter->doSetVar($this->var, '$ctx->repeat');
list($varName, $expression) = $this->parseSetExpression($this->expression);
$code = $codewriter->evaluateExpression($expression);
// instantiate controller using expression
$codewriter->doSetVar( $this->var.'->'.$varName, 'new PHPTAL_RepeatController('.$code.')'."\n" );
$codewriter->pushContext();
// Lets loop the iterator with a foreach construct
$codewriter->doForeach('$ctx->'.$varName, $this->var.'->'.$varName);
}
public function after(PHPTAL_Php_CodeWriter $codewriter)
{
$codewriter->doEnd('foreach');
$codewriter->popContext();
$codewriter->recycleTempVariable($this->var);
}
}
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