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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\bootstrap4;
use yii\base\InvalidConfigException;
use yii\data\Pagination;
use yii\helpers\ArrayHelper;
/**
* LinkPager represents a bootstrap 4 version of [[\yii\widgets\LinkPager]]. It displays a list of hyperlinks
* that lead to different pages of target.
*
* LinkPager works with a [[\yii\data\Pagination]] object which specifies the total number
* of pages and the current page number.
*
* To apply LinkPager globally e.g. in all GridViews, set in configuration DI:
*
* ```php
* 'container' => [
* 'definitions' => [
* \yii\widgets\LinkPager::class => \yii\bootstrap4\LinkPager::class,
* ],
* ],
* ```
*
* @see https://getbootstrap.com/docs/4.6/components/pagination/
* @author Simon Karlen <simi.albi@outlook.com>
* @since 2.0.2
*/
class LinkPager extends Widget
{
/**
* @var Pagination the pagination object that this pager is associated with.
* You must set this property in order to make LinkPager work.
*/
public $pagination;
/**
* @var array HTML attributes for the pager container tag.
* @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
*/
public $options = [];
/**
* @var array HTML attributes for the pager list tag.
* @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
*/
public $listOptions = ['class' => ['pagination']];
/**
* @var array HTML attributes which will be applied to all link containers
*/
public $linkContainerOptions = ['class' => ['page-item']];
/**
* @var array HTML attributes for the link in a pager container tag.
* @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
*/
public $linkOptions = ['class' => ['page-link']];
/**
* @var string the CSS class for the each page button.
*/
public $pageCssClass;
/**
* @var string the CSS class for the "first" page button.
*/
public $firstPageCssClass = 'first';
/**
* @var string the CSS class for the "last" page button.
*/
public $lastPageCssClass = 'last';
/**
* @var string the CSS class for the "previous" page button.
*/
public $prevPageCssClass = 'prev';
/**
* @var string the CSS class for the "next" page button.
*/
public $nextPageCssClass = 'next';
/**
* @var string the CSS class for the active (currently selected) page button.
*/
public $activePageCssClass = 'active';
/**
* @var string the CSS class for the disabled page buttons.
*/
public $disabledPageCssClass = 'disabled';
/**
* @var array the options for the disabled tag to be generated inside the disabled list element.
* In order to customize the html tag, please use the tag key.
*
* ```php
* $disabledListItemSubTagOptions = ['class' => 'disabled-link'];
* ```
*/
public $disabledListItemSubTagOptions = [];
/**
* @var int maximum number of page buttons that can be displayed. Defaults to 10.
*/
public $maxButtonCount = 10;
/**
* @var string|bool the label for the "next" page button. Note that this will NOT be HTML-encoded.
* If this property is false, the "next" page button will not be displayed.
*/
public $nextPageLabel = "<span aria-hidden=\"true\">»</span>\n<span class=\"sr-only\">Next</span>";
/**
* @var string|bool the text label for the "previous" page button. Note that this will NOT be HTML-encoded.
* If this property is false, the "previous" page button will not be displayed.
*/
public $prevPageLabel = "<span aria-hidden=\"true\">«</span>\n<span class=\"sr-only\">Previous</span>";
/**
* @var string|bool the text label for the "first" page button. Note that this will NOT be HTML-encoded.
* If it's specified as true, page number will be used as label.
* Default is false that means the "first" page button will not be displayed.
*/
public $firstPageLabel = false;
/**
* @var string|bool the text label for the "last" page button. Note that this will NOT be HTML-encoded.
* If it's specified as true, page number will be used as label.
* Default is false that means the "last" page button will not be displayed.
*/
public $lastPageLabel = false;
/**
* @var bool whether to register link tags in the HTML header for prev, next, first and last page.
* Defaults to `false` to avoid conflicts when multiple pagers are used on one page.
* @see http://www.w3.org/TR/html401/struct/links.html#h-12.1.2
* @see registerLinkTags()
*/
public $registerLinkTags = false;
/**
* @var bool Hide widget when only one page exist.
*/
public $hideOnSinglePage = true;
/**
* @var bool whether to render current page button as disabled.
*/
public $disableCurrentPageButton = false;
/**
* Initializes the pager.
* @throws InvalidConfigException
*/
public function init()
{
parent::init();
if ($this->pagination === null) {
throw new InvalidConfigException('The "pagination" property must be set.');
}
}
/**
* Executes the widget.
* This overrides the parent implementation by displaying the generated page buttons.
*/
public function run()
{
if ($this->registerLinkTags) {
$this->registerLinkTags();
}
$options = $this->options;
$tag = ArrayHelper::remove($options, 'tag', 'nav');
$html = Html::beginTag($tag, $options);
$html .= $this->renderPageButtons();
$html .= Html::endTag($tag);
return $html;
}
/**
* Registers relational link tags in the html header for prev, next, first and last page.
* These links are generated using [[\yii\data\Pagination::getLinks()]].
* @see http://www.w3.org/TR/html401/struct/links.html#h-12.1.2
*/
protected function registerLinkTags()
{
$view = $this->getView();
foreach ($this->pagination->getLinks() as $rel => $href) {
$view->registerLinkTag(['rel' => $rel, 'href' => $href], $rel);
}
}
/**
* Renders the page buttons.
* @return string the rendering result
*/
protected function renderPageButtons()
{
$pageCount = $this->pagination->getPageCount();
if ($pageCount < 2 && $this->hideOnSinglePage) {
return '';
}
$buttons = [];
$currentPage = $this->pagination->getPage();
// first page
$firstPageLabel = $this->firstPageLabel === true ? '1' : $this->firstPageLabel;
if ($firstPageLabel !== false) {
$buttons[] = $this->renderPageButton(
$firstPageLabel,
0,
$this->firstPageCssClass,
$currentPage <= 0,
false
);
}
// prev page
if ($this->prevPageLabel !== false) {
if (($page = $currentPage - 1) < 0) {
$page = 0;
}
$buttons[] = $this->renderPageButton(
$this->prevPageLabel,
$page,
$this->prevPageCssClass,
$currentPage <= 0,
false
);
}
// internal pages
list($beginPage, $endPage) = $this->getPageRange();
for ($i = $beginPage; $i <= $endPage; ++$i) {
$buttons[] = $this->renderPageButton(
$i + 1,
$i,
null,
$this->disableCurrentPageButton && $i == $currentPage,
$i == $currentPage
);
}
// next page
if ($this->nextPageLabel !== false) {
if (($page = $currentPage + 1) >= $pageCount - 1) {
$page = $pageCount - 1;
}
$buttons[] = $this->renderPageButton(
$this->nextPageLabel,
$page,
$this->nextPageCssClass,
$currentPage >= $pageCount - 1,
false
);
}
// last page
$lastPageLabel = $this->lastPageLabel === true ? $pageCount : $this->lastPageLabel;
if ($lastPageLabel !== false) {
$buttons[] = $this->renderPageButton(
$lastPageLabel,
$pageCount - 1,
$this->lastPageCssClass,
$currentPage >= $pageCount - 1,
false
);
}
$options = $this->listOptions;
$tag = ArrayHelper::remove($options, 'tag', 'ul');
return Html::tag($tag, implode("\n", $buttons), $options);
}
/**
* Renders a page button.
* You may override this method to customize the generation of page buttons.
* @param string $label the text label for the button
* @param int $page the page number
* @param string $class the CSS class for the page button.
* @param bool $disabled whether this page button is disabled
* @param bool $active whether this page button is active
* @return string the rendering result
*/
protected function renderPageButton($label, $page, $class, $disabled, $active)
{
$options = $this->linkContainerOptions;
$linkWrapTag = ArrayHelper::remove($options, 'tag', 'li');
Html::addCssClass($options, empty($class) ? $this->pageCssClass : $class);
$linkOptions = $this->linkOptions;
$linkOptions['data-page'] = $page;
if ($active) {
Html::addCssClass($options, $this->activePageCssClass);
}
if ($disabled) {
Html::addCssClass($options, $this->disabledPageCssClass);
$disabledItemOptions = $this->disabledListItemSubTagOptions;
$linkOptions = ArrayHelper::merge($linkOptions, $disabledItemOptions);
$linkOptions['tabindex'] = '-1';
}
return Html::tag($linkWrapTag, Html::a($label, $this->pagination->createUrl($page), $linkOptions), $options);
}
/**
* @return array the begin and end pages that need to be displayed.
*/
protected function getPageRange()
{
$currentPage = $this->pagination->getPage();
$pageCount = $this->pagination->getPageCount();
$beginPage = max(0, $currentPage - (int)($this->maxButtonCount / 2));
if (($endPage = $beginPage + $this->maxButtonCount - 1) >= $pageCount) {
$endPage = $pageCount - 1;
$beginPage = max(0, $endPage - $this->maxButtonCount + 1);
}
return [$beginPage, $endPage];
}
}
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