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<?php // vim:ts=4:sw=4:et:fdm=marker
/**
* Implements ability for a Grids (or listers) to divide their rows into multiple
* pages. Usage: $grid->addPaginatior(20);
*
* @link http://agiletoolkit.org/learn/understand/view/usage
* @link http://agiletoolkit.org/learn/template
*//*
==ATK4===================================================
This file is part of Agile Toolkit 4
http://agiletoolkit.org/
(c) 2008-2011 Romans Malinovskis <atk@agiletech.ie>
Distributed under Affero General Public License v3
See http://agiletoolkit.org/about/license
=====================================================ATK4=*/
class Paginator extends AbstractView {
/*
* Paginator is a class you should use when you need to separate lists into
* several pages
*/
public $ipp=30;
public $skip=0;
public $range=4;

protected $template_chunks=array();
protected $region='';
protected $object='';
protected $found_rows=null;
protected $total_pages=null;

protected $limiters=array();
function init(){
parent::init();

$this->grabTemplateChunk('link');
$this->grabTemplateChunk('prev');
$this->grabTemplateChunk('cur_item');
$this->grabTemplateChunk('separator');
$this->grabTemplateChunk('next');
$this->skip=$this->learn('skip',
@$_GET[$this->name.'_skip'])+0;

$this->api->addHook('pre-exec',array($this,'applyHook'), 1);
}
function applyHook(){
if(isset($this->owner->dq)){
$this->limiters[]=$this->owner->dq;
}elseif(isset($this->owner->data)){
$this->limiters[]=&$this->owner->data;
}
foreach($this->limiters as $key=>$dq){
if($this->limiters[$key] instanceof DBlite_dsql)$this->applyDQ($this->limiters[$key]);
}
}
function applyDQ($dq){
//$dq->calc_found_rows();
$dq->limit($this->ipp,$this->skip);
}
function applyData(&$data){
$data=array_slice($data,$this->skip,$this->ipp);
}
function defaultTemplate(){
return array('paginator','paginator');
}
function grabTemplateChunk($name){
if($this->template->is_set($name)){
$this->template_chunks[$name] = $this->template->cloneRegion($name);
}else{
// hmm.. i wonder what ? :)
}
}
function ipp($ipp){
$this->ipp=$ipp;
return $this;
}
function pageRange($pageRange){
$this->range=$pageRange;
return $this;
}
function useDQ($dq){
if($dq===$this->owner->dq){
throw new ObsoleteException("You shouldn't use useDQ for Paginator if you are adding it into parent. This metod can be used to add additional DQ's controlled by this paginator. This is useful if you are having more than one lister controlled by paginator.");
}
$this->limiters[]=$dq;
return $this;
}
function region($region){
//$this->region=$region;
$this->template_chunks['link']->trySet('region',$region);
return $this;
}
function cutObject($object){
$this->template_chunks['link']->trySet('object',$object);
return $this;
}
function render(){
if(!isset($this->found_rows)){
if(isset($this->limiters[0])){
if($this->limiters[0] instanceof DBlite_dsql)$this->found_rows = $this->limiters[0]->foundRows();
else $this->found_rows=sizeof($this->limiters[0]);
}
}
if(!isset($this->found_rows))
$this->found_rows=1000;

$this->cur_page=floor($this->skip / $this->ipp) +1;
$this->total_pages = ceil($this->found_rows / $this->ipp);

if($this->cur_page>$this->total_pages){
// We are on a wrong page. Recalculate everything.
$this->cur_page=1;
$this->skip=$this->ipp*($this->cur_page-1);
foreach($this->limiters as $key=>$l){
if($l instanceof DBlite_dsql){
$this->limiters[$key]->limit($this->ipp,$this->skip);
$this->limiters[$key]->do_select();
}
}
}
// static source should be filtered here, after all calculations
if(is_array($this->limiters[0]))$this->applyData($this->limiters[0]);

//displaying only there is more than 1 page
if($this->total_pages<=1)return;

$s = $this->template_chunks['separator']->render();

// left
if($this->cur_page==1){
$this->output($this->template_chunks['prev']->render());
}else{
$this->output($this->link('prev',array($this->name.'_skip'=>max(0,$this->skip-$this->ipp))));
}
$this->output(' ');

// first
$this->outputNum(1);
if($this->total_pages>1){
//$this->output($s);

$range = $this->range;
// first_in_range
$left=$this->cur_page-$range;
$right=$this->cur_page+$range;

if($left<3)$left=2;else $this->output(' .. ');
for($n=$left;$n<=$right;$n++){
if($n>$left || $left==2)$this->output($s);
$this->outputNum($n);
if($n==$this->total_pages)break;
}
if($n<$this->total_pages){
$this->output(' .. ');
$this->outputNum($this->total_pages);
}
$this->output(' ');
}else{
$this->output(' ');
}
if($this->cur_page>=$this->total_pages){
$this->output($this->template_chunks['next']->render());
}else{
$this->output($this->link('next',array($this->name.'_skip'=>$this->skip+$this->ipp)));
}
}
function outputNum($n){
if($n==$this->cur_page){
$this->output($this->template_chunks['cur_item']->trySet('item',$n)->trySet('total_items',$this->found_rows)->render());
}else{
$this->output($this->linkNoTemplate($n,array($this->name.'_skip'=>($n-1)*$this->ipp)));
}
}
function linkUrl($url_args = array()){
return $this->api->getDestinationURL(null, $url_args);
}
function link($chunk,$url_args,$tpl_args=array()){
$this->template_chunks['link']->set(array(
'link_url'=>$this->linkUrl($url_args),
'link_text'=>$this->template_chunks[$chunk]->set($tpl_args)->render()
));
return $this->template_chunks['link']->render();
}
function linkNoTemplate($text,$url_args,$tpl_args=array()){
$this->template_chunks['link']->set(array(
'link_url'=>$this->linkUrl($url_args),
//'region'=>$this->region,
'link_text'=>$text
));
return $this->template_chunks['link']->render();
}
}
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