/**
* @see lib/moodle_html_component#prepare()
* @return void
*/
public function prepare()
{
if (empty($this->totalcount)) {
throw new coding_exception('moodle_paging_bar requires a totalcount value.');
}
if (!isset($this->page) || is_null($this->page)) {
throw new coding_exception('moodle_paging_bar requires a page value.');
}
if (empty($this->perpage)) {
throw new coding_exception('moodle_paging_bar requires a perpage value.');
}
if (empty($this->baseurl)) {
throw new coding_exception('moodle_paging_bar requires a baseurl value.');
}
if (!$this->baseurl instanceof moodle_url) {
$this->baseurl = new moodle_url($this->baseurl);
}
if ($this->totalcount > $this->perpage) {
$pagenum = $this->page - 1;
if ($this->page > 0) {
$this->previouslink = new html_link();
$this->previouslink->add_class('previous');
$this->previouslink->url = clone $this->baseurl;
$this->previouslink->url->param($this->pagevar, $pagenum);
$this->previouslink->text = get_string('previous');
}
if ($this->perpage > 0) {
$lastpage = ceil($this->totalcount / $this->perpage);
} else {
$lastpage = 1;
}
if ($this->page > 15) {
$startpage = $this->page - 10;
$this->firstlink = new html_link();
$this->firstlink->url = clone $this->baseurl;
$this->firstlink->url->param($this->pagevar, 0);
$this->firstlink->text = 1;
$this->firstlink->add_class('first');
} else {
$startpage = 0;
}
$currpage = $startpage;
$displaycount = $displaypage = 0;
while ($displaycount < $this->maxdisplay and $currpage < $lastpage) {
$displaypage = $currpage + 1;
if ($this->page == $currpage && empty($this->nocurr)) {
$this->pagelinks[] = $displaypage;
} else {
$pagelink = new html_link();
$pagelink->url = clone $this->baseurl;
$pagelink->url->param($this->pagevar, $currpage);
$pagelink->text = $displaypage;
$this->pagelinks[] = $pagelink;
}
$displaycount++;
$currpage++;
}
if ($currpage < $lastpage) {
$lastpageactual = $lastpage - 1;
$this->lastlink = new html_link();
$this->lastlink->url = clone $this->baseurl;
$this->lastlink->url->param($this->pagevar, $lastpageactual);
$this->lastlink->text = $lastpage;
$this->lastlink->add_class('last');
}
$pagenum = $this->page + 1;
if ($pagenum != $displaypage) {
$this->nextlink = new html_link();
$this->nextlink->url = clone $this->baseurl;
$this->nextlink->url->param($this->pagevar, $pagenum);
$this->nextlink->text = get_string('next');
$this->nextlink->add_class('next');
}
}
}