/**
* SimplePager, unlike the PEAR Pager class, is a pager made to work
* with template-like layouts. The constructor sets up the variables
* you need to render the links, and you can render them
* however you like. There is a default render function for
* reference.
*
* @param int $p_totalItems
* Total number of items.
*
* @param int $p_itemsPerPage
* Number of items to display per page.
*
* @param string $p_offsetVarName
* The name of the REQUEST variable which holds the order number
* of the first item on the selected page.
*
* @param string $p_baseUrl
* The url to which we attach the offset variable name.
*
* @param boolean $p_useSessions
* Set to TRUE if you want the offset item number to be stored in
* the session so that the user will return to their previous
* position in the pager when they leave the screen and come back
* to it.
*/
public function SimplePager($p_totalItems, $p_itemsPerPage, $p_offsetVarName,
$p_baseUrl, $p_useSessions = true, $p_width = 10)
{
global $_REQUEST;
$this->m_urls["links"] = array();
if ($p_totalItems < 0) {
$p_totalItems = 0;
}
if ($p_itemsPerPage < 1) {
$p_itemsPerPage = 1;
}
// Get the current page number.
if ($p_useSessions) {
$this->m_offset = camp_session_get($p_offsetVarName, 0);
} else {
$this->m_offset = isset($_REQUEST[$p_offsetVarName]) ? $_REQUEST[$p_offsetVarName] : 0;
}
if ($this->m_offset < 0) {
$this->m_offset = 0;
} elseif ( ($this->m_offset) > $p_totalItems) {
// If the offset is past the total number of items,
// reset it.
$this->m_offset = 0;
if ($p_useSessions) {
camp_session_set($p_offsetVarName, 0);
}
}
// Only generate pager if there is more than one page of information.
if ($p_totalItems > $p_itemsPerPage) {
// Generate the offsets into the list.
$remainder = $p_totalItems % $p_itemsPerPage;
if ($remainder == 0) {
$this->m_offsets = SimplePager::_range(0, $p_totalItems-1, $p_itemsPerPage);
} else {
$this->m_offsets = SimplePager::_range(0, $p_totalItems, $p_itemsPerPage);
}
$this->m_numPages = count($this->m_offsets);
$this->m_selectedPageNumber = floor($this->m_offset/$p_itemsPerPage)+1;
if ($p_width > $this->m_numPages) {
$p_width = $this->m_numPages;
}
// Generate the numbered links
if ($this->m_selectedPageNumber < ($p_width/2 + 1)) {
$begin = 0;
$end = $p_width;
} else if ($this->m_selectedPageNumber > ($this->m_numPages - ($p_width/2))) {
$begin = $this->m_numPages - $p_width;
$end = $this->m_numPages;
} else {
$begin = $this->m_selectedPageNumber - ceil($p_width/2) - 1;
$end = $this->m_selectedPageNumber + ceil($p_width/2);
}
for ($index = $begin; $index < $end; $index++) {
$this->m_urls["links"][$index+1] = $p_baseUrl."$p_offsetVarName=".$this->m_offsets[$index];
}
// Generate special links.
if ($this->m_selectedPageNumber > 1) {
$this->m_urls["first"] = $p_baseUrl."$p_offsetVarName=".$this->m_offsets[0];
$this->m_urls["previous"] = $p_baseUrl."$p_offsetVarName=".$this->m_offsets[max(0, $this->m_selectedPageNumber-2)];
}
if ($this->m_selectedPageNumber > 10) {
$this->m_urls["previous_10_pages"] = $p_baseUrl."$p_offsetVarName=".$this->m_offsets[max(0, $this->m_selectedPageNumber-11)];
}
if ($this->m_selectedPageNumber > 100) {
$this->m_urls["previous_100_pages"] = $p_baseUrl."$p_offsetVarName=".$this->m_offsets[max(0, $this->m_selectedPageNumber-101)];
}
if ( ($this->m_numPages > $this->m_selectedPageNumber)) {
$this->m_urls["next"] = $p_baseUrl."$p_offsetVarName=".$this->m_offsets[min($this->m_numPages-1, $this->m_selectedPageNumber)];
}
if ( ($this->m_numPages - $this->m_selectedPageNumber) > 9) {
$this->m_urls["next_10_pages"] = $p_baseUrl."$p_offsetVarName=".$this->m_offsets[min($this->m_numPages-1, $this->m_selectedPageNumber+9)];
}
if ( ($this->m_numPages - $this->m_selectedPageNumber) > 99) {
$this->m_urls["next_100_pages"] = $p_baseUrl."$p_offsetVarName=".$this->m_offsets[min($this->m_numPages-1, $this->m_selectedPageNumber+99)];
}
if ( ($this->m_numPages > $this->m_selectedPageNumber)) {
$this->m_urls["last"] = $p_baseUrl."$p_offsetVarName=".$this->m_offsets[$this->m_numPages-1];
}
}
} // constructor
