<?php if (!defined('BASEPATH')) exit('No direct access allowed.');

/**

* STBlog

*

* 基于Codeigniter的单用户多权限开源博客系统

*

*

* @package STBLOG

* @author Saturn

* @copyright Copyright (c) 2009 - 2010, cnsaturn.com.

* @license GNU General Public License 2.0

* @link http://code.google.com/p/stblog/

* @since Version 0.1

* @filesource

*/

// ------------------------------------------------------------------------

/**

* Script Name: Digg Style Paginator Class

* Script URI: http://www.mis-algoritmos.com/2007/05/27/digg-style-pagination-class/

* Description: Class in PHP that allows to use a pagination like a digg or sabrosus style.

* Script Version: 0.4

* Author: Victor De la Rocha

* Author URI: http://www.mis-algoritmos.com

*/

class Dpagination

{

/*Default values*/

var $total_pages = -1;//items

var $limit = null;

var $target = "";

var $page = 1;

var $adjacents = 2;

var $showCounter = false;

var $className = "pagination";

var $parameterName = "page";

var $urlF = false;//urlFriendly

/*Buttons next and previous*/

var $nextT = "Next";

var $nextI = "&#187;"; //&#9658;

var $prevT = "Previous";

var $prevI = "&#171;"; //&#9668;

/*****/

var $calculate = false;

#Total items

function items($value){$this->total_pages = (int) $value;}

#how many items to show per page

function limit($value){$this->limit = (int) $value;}

#Page to sent the page value

function target($value){$this->target = $value;}

#Current page

function currentPage($value){$this->page = (int) $value;}

#How many adjacent pages should be shown on each side of the current page?

function adjacents($value){$this->adjacents = (int) $value;}

#show counter?

function showCounter($value=""){$this->showCounter=($value===true)?true:false;}

#to change the class name of the pagination div

function changeClass($value=""){$this->className=$value;}

function nextLabel($value){$this->nextT = $value;}

function nextIcon($value){$this->nextI = $value;}

function prevLabel($value){$this->prevT = $value;}

function prevIcon($value){$this->prevI = $value;}

#to change the class name of the pagination div

function parameterName($value=""){$this->parameterName=$value;}

#to change urlFriendly

function urlFriendly($value="%"){

if(eregi('^ *$',$value)){

$this->urlF=false;

return false;

}

$this->urlF=$value;

}

var $pagination;

function pagination(){}

function show(){

if(!$this->calculate)

if($this->calculate())

echo "<div class=\"$this->className\">$this->pagination</div>\n";

}

function getOutput(){

if(!$this->calculate)

if($this->calculate())

return "<div class=\"$this->className\">$this->pagination</div>\n";

}

function get_pagenum_link($id){

if(strpos($this->target,'?')===false)

if($this->urlF)

return str_replace($this->urlF,$id,$this->target);

else

return "$this->target?$this->parameterName=$id";

else

return "$this->target&$this->parameterName=$id";

}

function calculate(){

$this->pagination = "";

$this->calculate == true;

$error = false;

if($this->urlF and $this->urlF != '%' and strpos($this->target,$this->urlF)===false){

//Es necesario especificar el comodin para sustituir

echo "Especificaste un wildcard para sustituir, pero no existe en el target<br />";

$error = true;

}elseif($this->urlF and $this->urlF == '%' and strpos($this->target,$this->urlF)===false){

echo "Es necesario especificar en el target el comodin % para sustituir el número de página<br />";

$error = true;

}

if($this->total_pages < 0){

echo "It is necessary to specify the <strong>number of pages</strong> (\$class->items(1000))<br />";

$error = true;

}

if($this->limit == null){

echo "It is necessary to specify the <strong>limit of items</strong> to show per page (\$class->limit(10))<br />";

$error = true;

}

if($error)return false;

$n = trim($this->nextT.' '.$this->nextI);

$p = trim($this->prevI.' '.$this->prevT);

/* Setup vars for query. */

if($this->page)

$start = ($this->page - 1) * $this->limit; //first item to display on this page

else

$start = 0; //if no page var is given, set start to 0

/* Setup page vars for display. */

$prev = $this->page - 1; //previous page is page - 1

$next = $this->page + 1; //next page is page + 1

$lastpage = ceil($this->total_pages/$this->limit); //lastpage is = total pages / items per page, rounded up.

$lpm1 = $lastpage - 1; //last page minus 1

/*

Now we apply our rules and draw the pagination object.

We're actually saving the code to a variable in case we want to draw it more than once.

*/

if($lastpage > 1){

if($this->page){

//anterior button

if($this->page > 1)

$this->pagination .= "<a href=\"".$this->get_pagenum_link($prev)."\" class=\"prev\">$p</a>";

else

$this->pagination .= "<span class=\"disabled\">$p</span>";

}

//pages

if ($lastpage < 7 + ($this->adjacents * 2)){//not enough pages to bother breaking it up

for ($counter = 1; $counter <= $lastpage; $counter++){

if ($counter == $this->page)

$this->pagination .= "<span class=\"current\">$counter</span>";

else

$this->pagination .= "<a href=\"".$this->get_pagenum_link($counter)."\">$counter</a>";

}

}

elseif($lastpage > 5 + ($this->adjacents * 2)){//enough pages to hide some

//close to beginning; only hide later pages

if($this->page < 1 + ($this->adjacents * 2)){

for ($counter = 1; $counter < 4 + ($this->adjacents * 2); $counter++){

if ($counter == $this->page)

$this->pagination .= "<span class=\"current\">$counter</span>";

else

$this->pagination .= "<a href=\"".$this->get_pagenum_link($counter)."\">$counter</a>";

}

$this->pagination .= "...";

$this->pagination .= "<a href=\"".$this->get_pagenum_link($lpm1)."\">$lpm1</a>";

$this->pagination .= "<a href=\"".$this->get_pagenum_link($lastpage)."\">$lastpage</a>";

}

//in middle; hide some front and some back

elseif($lastpage - ($this->adjacents * 2) > $this->page && $this->page > ($this->adjacents * 2)){

$this->pagination .= "<a href=\"".$this->get_pagenum_link(1)."\">1</a>";

$this->pagination .= "<a href=\"".$this->get_pagenum_link(2)."\">2</a>";

$this->pagination .= "...";

for ($counter = $this->page - $this->adjacents; $counter <= $this->page + $this->adjacents; $counter++)

if ($counter == $this->page)

$this->pagination .= "<span class=\"current\">$counter</span>";

else

$this->pagination .= "<a href=\"".$this->get_pagenum_link($counter)."\">$counter</a>";

$this->pagination .= "...";

$this->pagination .= "<a href=\"".$this->get_pagenum_link($lpm1)."\">$lpm1</a>";

$this->pagination .= "<a href=\"".$this->get_pagenum_link($lastpage)."\">$lastpage</a>";

}

//close to end; only hide early pages

else{

$this->pagination .= "<a href=\"".$this->get_pagenum_link(1)."\">1</a>";

$this->pagination .= "<a href=\"".$this->get_pagenum_link(2)."\">2</a>";

$this->pagination .= "...";

for ($counter = $lastpage - (2 + ($this->adjacents * 2)); $counter <= $lastpage; $counter++)

if ($counter == $this->page)

$this->pagination .= "<span class=\"current\">$counter</span>";

else

$this->pagination .= "<a href=\"".$this->get_pagenum_link($counter)."\">$counter</a>";

}

}

if($this->page){

//siguiente button

if ($this->page < $counter - 1)

$this->pagination .= "<a href=\"".$this->get_pagenum_link($next)."\" class=\"next\">$n</a>";

else

$this->pagination .= "<span class=\"disabled\">$n</span>";

if($this->showCounter)$this->pagination .= "<div class=\"pagination_data\">($this->total_pages Pages)</div>";

}

}

return true;

}

}

/* End of file Dpagination.php */

/* Location: ./application/libraries/Dpagination.php */