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rexy |
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<?php
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/**
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* Foreach Runtime Methods count(), init(), restore()
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*
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* @package Smarty
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* @subpackage PluginsInternal
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* @author Uwe Tews
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*/
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class Smarty_Internal_Runtime_Foreach
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{
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/**
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* Stack of saved variables
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*
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* @var array
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*/
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private $stack = array();
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/**
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* Init foreach loop
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* - save item and key variables, named foreach property data if defined
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* - init item and key variables, named foreach property data if required
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* - count total if required
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*
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* @param \Smarty_Internal_Template $tpl
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* @param mixed $from values to loop over
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* @param string $item variable name
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* @param bool $needTotal flag if we need to count values
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* @param null|string $key variable name
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* @param null|string $name of named foreach
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* @param array $properties of named foreach
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*
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* @return mixed $from
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*/
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public function init(
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Smarty_Internal_Template $tpl,
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$from,
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$item,
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$needTotal = false,
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$key = null,
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$name = null,
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$properties = array()
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) {
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$needTotal = $needTotal || isset($properties[ 'total' ]);
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$saveVars = array();
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$total = null;
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if (!is_array($from)) {
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if (is_object($from)) {
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if ($needTotal) {
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$total = $this->count($from);
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}
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} else {
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settype($from, 'array');
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}
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}
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if (!isset($total)) {
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$total = empty($from) ? 0 : ($needTotal ? count($from) : 1);
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}
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if (isset($tpl->tpl_vars[ $item ])) {
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$saveVars[ 'item' ] = array(
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$item,
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$tpl->tpl_vars[ $item ]
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);
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}
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$tpl->tpl_vars[ $item ] = new Smarty_Variable(null, $tpl->isRenderingCache);
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if ($total === 0) {
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$from = null;
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} else {
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if ($key) {
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if (isset($tpl->tpl_vars[ $key ])) {
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$saveVars[ 'key' ] = array(
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$key,
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$tpl->tpl_vars[ $key ]
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);
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}
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$tpl->tpl_vars[ $key ] = new Smarty_Variable(null, $tpl->isRenderingCache);
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}
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}
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if ($needTotal) {
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$tpl->tpl_vars[ $item ]->total = $total;
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}
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if ($name) {
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$namedVar = "__smarty_foreach_{$name}";
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if (isset($tpl->tpl_vars[ $namedVar ])) {
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$saveVars[ 'named' ] = array(
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$namedVar,
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$tpl->tpl_vars[ $namedVar ]
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);
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}
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$namedProp = array();
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if (isset($properties[ 'total' ])) {
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$namedProp[ 'total' ] = $total;
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}
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if (isset($properties[ 'iteration' ])) {
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$namedProp[ 'iteration' ] = 0;
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}
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if (isset($properties[ 'index' ])) {
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$namedProp[ 'index' ] = -1;
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}
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if (isset($properties[ 'show' ])) {
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$namedProp[ 'show' ] = ($total > 0);
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}
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$tpl->tpl_vars[ $namedVar ] = new Smarty_Variable($namedProp);
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}
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$this->stack[] = $saveVars;
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return $from;
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}
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/**
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* [util function] counts an array, arrayAccess/traversable or PDOStatement object
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*
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* @param mixed $value
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*
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* @return int the count for arrays and objects that implement countable, 1 for other objects that don't, and 0
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* for empty elements
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*/
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public function count($value)
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{
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if ($value instanceof IteratorAggregate) {
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// Note: getIterator() returns a Traversable, not an Iterator
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// thus rewind() and valid() methods may not be present
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return iterator_count($value->getIterator());
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} elseif ($value instanceof Iterator) {
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return $value instanceof Generator ? 1 : iterator_count($value);
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} elseif ($value instanceof Countable) {
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return count($value);
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} elseif ($value instanceof PDOStatement) {
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return $value->rowCount();
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} elseif ($value instanceof Traversable) {
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return iterator_count($value);
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}
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return count((array)$value);
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}
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/**
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* Restore saved variables
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*
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* will be called by {break n} or {continue n} for the required number of levels
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*
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* @param \Smarty_Internal_Template $tpl
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* @param int $levels number of levels
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*/
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public function restore(Smarty_Internal_Template $tpl, $levels = 1)
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{
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while ($levels) {
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$saveVars = array_pop($this->stack);
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if (!empty($saveVars)) {
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if (isset($saveVars[ 'item' ])) {
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$item = &$saveVars[ 'item' ];
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$tpl->tpl_vars[ $item[ 0 ] ]->value = $item[ 1 ]->value;
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}
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if (isset($saveVars[ 'key' ])) {
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$tpl->tpl_vars[ $saveVars[ 'key' ][ 0 ] ] = $saveVars[ 'key' ][ 1 ];
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}
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if (isset($saveVars[ 'named' ])) {
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$tpl->tpl_vars[ $saveVars[ 'named' ][ 0 ] ] = $saveVars[ 'named' ][ 1 ];
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}
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}
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$levels--;
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}
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}
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}
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