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phab/src/view/control/AphrontCursorPagerView.php
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AphrontCursorPagerView.php
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<?php
/*
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
final class AphrontCursorPagerView extends AphrontView {
private $afterID;
private $beforeID;
private $pageSize = 100;
private $nextPageID;
private $prevPageID;
private $uri;
final public function setPageSize($page_size) {
$this->pageSize = max(1, $page_size);
return $this;
}
final public function getPageSize() {
return $this->pageSize;
}
final public function setURI(PhutilURI $uri) {
$this->uri = $uri;
return $this;
}
final public function readFromRequest(AphrontRequest $request) {
$this->uri = $request->getRequestURI();
$this->afterID = $request->getStr('after');
$this->beforeID = $request->getStr('before');
return $this;
}
final public function setAfterID($after_id) {
$this->afterID = $after_id;
return $this;
}
final public function getAfterID() {
return $this->afterID;
}
final public function setBeforeID($before_id) {
$this->beforeID = $before_id;
return $this;
}
final public function getBeforeID() {
return $this->beforeID;
}
final public function setNextPageID($next_page_id) {
$this->nextPageID = $next_page_id;
return $this;
}
final public function getNextPageID() {
return $this->nextPageID;
}
final public function setPrevPageID($prev_page_id) {
$this->prevPageID = $prev_page_id;
return $this;
}
final public function getPrevPageID() {
return $this->prevPageID;
}
final public function sliceResults(array $results) {
if (count($results) > $this->getPageSize()) {
$offset = ($this->beforeID ? count($results) - $this->getPageSize() : 0);
$results = array_slice($results, $offset, $this->getPageSize(), true);
}
return $results;
}
public function render() {
if (!$this->uri) {
throw new Exception(
"You must call setURI() before you can call render().");
}
$links = array();
if ($this->beforeID || $this->afterID) {
$links[] = phutil_render_tag(
'a',
array(
'href' => $this->uri
->alter('before', null)
->alter('after', null),
),
"\xC2\xAB First");
}
if ($this->prevPageID) {
$links[] = phutil_render_tag(
'a',
array(
'href' => $this->uri
->alter('after', null)
->alter('before', $this->prevPageID),
),
"\xE2\x80\xB9 Prev");
}
if ($this->nextPageID) {
$links[] = phutil_render_tag(
'a',
array(
'href' => $this->uri
->alter('after', $this->nextPageID)
->alter('before', null),
),
"Next \xE2\x80\xBA");
}
return
'<div class="aphront-pager-view">'.
implode('', $links).
'</div>';
}
}
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