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<?php

/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

/**

 * Contains the Pager class

 *

 * PHP versions 4 and 5

 *

 * LICENSE: Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. The name of the author may not be used to endorse or promote products

 *    derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * @category   HTML

 * @package    Pager

 * @author     Lorenzo Alberton <l dot alberton at quipo dot it>

 * @author     Richard Heyes <richard@phpguru.org>

 * @copyright  2003-2006 Lorenzo Alberton, Richard Heyes

 * @license    http://www.debian.org/misc/bsd.license  BSD License (3 Clause)

 * @version    CVS: $Id: Pager.php,v 1.2 2007-11-06 10:54:04 jp_milcent Exp $

 * @link       http://pear.php.net/package/Pager

 */

/**

 * Pager - Wrapper class for [Sliding|Jumping]-window Pager

 * Usage examples can be found in the PEAR manual

 *

 * @category   HTML

 * @package    Pager

 * @author     Lorenzo Alberton <l dot alberton at quipo dot it>

 * @author     Richard Heyes <richard@phpguru.org>,

 * @copyright  2003-2005 Lorenzo Alberton, Richard Heyes

 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0

 * @link       http://pear.php.net/package/Pager

 */

class Pager

{

    // {{{ Pager()

    /**

     * Constructor

     *

     * -------------------------------------------------------------------------

     * VALID options are (default values are set some lines before):

     *  - mode       (string): "Jumping" or "Sliding"  -window - It determines

     *                         pager behaviour. See the manual for more details

     *  - totalItems (int):    # of items to page.

     *  - perPage    (int):    # of items per page.

     *  - delta      (int):    # of page #s to show before and after the current

     *                         one

     *  - linkClass  (string): name of CSS class used for link styling.

     *  - append     (bool):   if true pageID is appended as GET value to the

     *                         URL - if false it is embedded in the URL

     *                         according to "fileName" specs

     *  - httpMethod (string): Specifies the HTTP method to use. Valid values

     *                         are 'GET' or 'POST'

     *                         according to "fileName" specs

     *  - importQuery (bool):  if true (default behaviour), variables and

     *                         values are imported from the submitted data

     *                         (query string) and used in the generated links

     *                         otherwise they're ignored completely

     *  - path       (string): complete path to the page (without the page name)

     *  - fileName   (string): name of the page, with a %d if append=true

     *  - urlVar     (string): name of pageNumber URL var, for example "pageID"

     *  - altPrev    (string): alt text to display for prev page, on prev link.

     *  - altNext    (string): alt text to display for next page, on next link.

     *  - altPage    (string): alt text to display before the page number.

     *  - prevImg    (string): sth (it can be text such as "<< PREV" or an

     *                         <img/> as well...) to display instead of "<<".

     *  - nextImg    (string): same as prevImg, used for NEXT link, instead of

     *                         the default value, which is ">>".

     *  - separator  (string): what to use to separate numbers (can be an

     *                         <img/>, a comma, an hyphen, or whatever.

     *  - spacesBeforeSeparator

     *               (int):    number of spaces before the separator.

     *  - firstPagePre (string):

     *                         string used before first page number (can be an

     *                         <img/>, a "{", an empty string, or whatever.

     *  - firstPageText (string):

     *                         string used in place of first page number

     *  - firstPagePost (string):

     *                         string used after first page number (can be an

     *                         <img/>, a "}", an empty string, or whatever.

     *  - lastPagePre (string):

     *                         similar to firstPagePre.

     *  - lastPageText (string):

     *                         similar to firstPageText.

     *  - lastPagePost (string):

     *                         similar to firstPagePost.

     *  - spacesAfterSeparator

     *               (int):    number of spaces after the separator.

     *  - firstLinkTitle (string):

     *                          string used as title in <link rel="first"> tag

     *  - lastLinkTitle (string):

     *                          string used as title in <link rel="last"> tag

     *  - prevLinkTitle (string):

     *                          string used as title in <link rel="prev"> tag

     *  - nextLinkTitle (string):

     *                          string used as title in <link rel="next"> tag

     *  - curPageLinkClassName

     *               (string): name of CSS class used for current page link.

     *  - clearIfVoid(bool):   if there's only one page, don't display pager.

     *  - extraVars (array):   additional URL vars to be added to the querystring

     *  - excludeVars (array): URL vars to be excluded in the querystring

     *  - itemData   (array):  array of items to page.

     *  - useSessions (bool):  if true, number of items to display per page is

     *                         stored in the $_SESSION[$_sessionVar] var.

     *  - closeSession (bool): if true, the session is closed just after R/W.

     *  - sessionVar (string): name of the session var for perPage value.

     *                         A value != from default can be useful when

     *                         using more than one Pager istance in the page.

     *  - pearErrorMode (constant):

     *                         PEAR_ERROR mode for raiseError().

     *                         Default is PEAR_ERROR_RETURN.

     * -------------------------------------------------------------------------

     * REQUIRED options are:

     *  - fileName IF append==false (default is true)

     *  - itemData OR totalItems (if itemData is set, totalItems is overwritten)

     * -------------------------------------------------------------------------

     *

     * @param mixed $options    An associative array of option names and

     *                          their values.

     * @access public

     */

    function Pager($options = array())

    {

        //this check evaluates to true on 5.0.0RC-dev,

        //so i'm using another one, for now...

        //if (version_compare(phpversion(), '5.0.0') == -1) {

        if (get_class($this) == 'pager') { //php4 lowers class names

            // assign factoried method to this for PHP 4

            eval('$this = Pager::factory($options);');

        } else { //php5 is case sensitive

            $msg = 'Pager constructor is deprecated.'

                  .' You must use the "Pager::factory($params)" method'

                  .' instead of "new Pager($params)"';

            trigger_error($msg, E_USER_ERROR);

        }

    }

    // }}}

    // {{{ factory()

    /**

     * Return a pager based on $mode and $options

     *

     * @param  array $options Optional parameters for the storage class

     * @return object Object   Storage object

     * @static

     * @access public

     */

    static function &factory($options = array())

    {

        $mode = (isset($options['mode']) ? ucfirst($options['mode']) : 'Jumping');

        $classname = 'Pager_' . $mode;

        $classfile = 'Pager' . DIRECTORY_SEPARATOR . $mode . '.php';

        // Attempt to include a custom version of the named class, but don't treat

        // a failure as fatal.  The caller may have already included their own

        // version of the named class.

        if (!class_exists($classname)) {

            include_once $classfile;

        }

        // If the class exists, return a new instance of it.

        if (class_exists($classname)) {

            $pager =& new $classname($options);

            return $pager;

        }

        $null = null;

        return $null;

    }

    // }}}

}

?>