276 lines
9.8 KiB
PHP
276 lines
9.8 KiB
PHP
<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\widgets;
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use Yii;
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use yii\base\InvalidConfigException;
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use yii\base\Widget;
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use yii\data\Pagination;
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use yii\helpers\ArrayHelper;
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use yii\helpers\Html;
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/**
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* LinkPager displays a list of hyperlinks that lead to different pages of target.
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*
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* LinkPager works with a [[Pagination]] object which specifies the total number
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* of pages and the current page number.
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*
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* Note that LinkPager only generates the necessary HTML markups. In order for it
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* to look like a real pager, you should provide some CSS styles for it.
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* With the default configuration, LinkPager should look good using Twitter Bootstrap CSS framework.
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*
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* For more details and usage information on LinkPager, see the [guide article on pagination](guide:output-pagination).
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class LinkPager extends Widget
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{
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/**
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* @var Pagination the pagination object that this pager is associated with.
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* You must set this property in order to make LinkPager work.
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*/
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public $pagination;
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/**
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* @var array HTML attributes for the pager container tag.
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* @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
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*/
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public $options = ['class' => 'pagination'];
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/**
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* @var array HTML attributes which will be applied to all link containers
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* @since 2.0.13
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*/
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public $linkContainerOptions = [];
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/**
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* @var array HTML attributes for the link in a pager container tag.
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* @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
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*/
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public $linkOptions = [];
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/**
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* @var string the CSS class for the each page button.
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* @since 2.0.7
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*/
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public $pageCssClass;
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/**
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* @var string the CSS class for the "first" page button.
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*/
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public $firstPageCssClass = 'first';
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/**
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* @var string the CSS class for the "last" page button.
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*/
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public $lastPageCssClass = 'last';
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/**
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* @var string the CSS class for the "previous" page button.
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*/
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public $prevPageCssClass = 'prev';
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/**
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* @var string the CSS class for the "next" page button.
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*/
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public $nextPageCssClass = 'next';
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/**
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* @var string the CSS class for the active (currently selected) page button.
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*/
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public $activePageCssClass = 'active';
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/**
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* @var string the CSS class for the disabled page buttons.
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*/
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public $disabledPageCssClass = 'disabled';
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/**
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* @var array the options for the disabled tag to be generated inside the disabled list element.
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* In order to customize the html tag, please use the tag key.
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*
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* ```php
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* $disabledListItemSubTagOptions = ['tag' => 'div', 'class' => 'disabled-div'];
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* ```
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* @since 2.0.11
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*/
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public $disabledListItemSubTagOptions = [];
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/**
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* @var int maximum number of page buttons that can be displayed. Defaults to 10.
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*/
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public $maxButtonCount = 10;
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/**
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* @var string|bool the label for the "next" page button. Note that this will NOT be HTML-encoded.
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* If this property is false, the "next" page button will not be displayed.
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*/
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public $nextPageLabel = '»';
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/**
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* @var string|bool the text label for the "previous" page button. Note that this will NOT be HTML-encoded.
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* If this property is false, the "previous" page button will not be displayed.
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*/
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public $prevPageLabel = '«';
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/**
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* @var string|bool the text label for the "first" page button. Note that this will NOT be HTML-encoded.
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* If it's specified as true, page number will be used as label.
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* Default is false that means the "first" page button will not be displayed.
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*/
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public $firstPageLabel = false;
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/**
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* @var string|bool the text label for the "last" page button. Note that this will NOT be HTML-encoded.
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* If it's specified as true, page number will be used as label.
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* Default is false that means the "last" page button will not be displayed.
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*/
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public $lastPageLabel = false;
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/**
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* @var bool whether to register link tags in the HTML header for prev, next, first and last page.
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* Defaults to `false` to avoid conflicts when multiple pagers are used on one page.
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* @see http://www.w3.org/TR/html401/struct/links.html#h-12.1.2
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* @see registerLinkTags()
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*/
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public $registerLinkTags = false;
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/**
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* @var bool Hide widget when only one page exist.
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*/
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public $hideOnSinglePage = true;
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/**
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* @var bool whether to render current page button as disabled.
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* @since 2.0.12
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*/
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public $disableCurrentPageButton = false;
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/**
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* Initializes the pager.
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*/
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public function init()
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{
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parent::init();
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if ($this->pagination === null) {
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throw new InvalidConfigException('The "pagination" property must be set.');
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}
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}
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/**
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* Executes the widget.
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* This overrides the parent implementation by displaying the generated page buttons.
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*/
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public function run()
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{
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if ($this->registerLinkTags) {
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$this->registerLinkTags();
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}
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echo $this->renderPageButtons();
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}
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/**
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* Registers relational link tags in the html header for prev, next, first and last page.
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* These links are generated using [[\yii\data\Pagination::getLinks()]].
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* @see http://www.w3.org/TR/html401/struct/links.html#h-12.1.2
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*/
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protected function registerLinkTags()
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{
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$view = $this->getView();
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foreach ($this->pagination->getLinks() as $rel => $href) {
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$view->registerLinkTag(['rel' => $rel, 'href' => $href], $rel);
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}
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}
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/**
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* Renders the page buttons.
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* @return string the rendering result
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*/
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protected function renderPageButtons()
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{
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$pageCount = $this->pagination->getPageCount();
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if ($pageCount < 2 && $this->hideOnSinglePage) {
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return '';
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}
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$buttons = [];
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$currentPage = $this->pagination->getPage();
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// first page
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$firstPageLabel = $this->firstPageLabel === true ? '1' : $this->firstPageLabel;
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if ($firstPageLabel !== false) {
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$buttons[] = $this->renderPageButton($firstPageLabel, 0, $this->firstPageCssClass, $currentPage <= 0, false);
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}
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// prev page
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if ($this->prevPageLabel !== false) {
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if (($page = $currentPage - 1) < 0) {
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$page = 0;
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}
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$buttons[] = $this->renderPageButton($this->prevPageLabel, $page, $this->prevPageCssClass, $currentPage <= 0, false);
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}
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// internal pages
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list($beginPage, $endPage) = $this->getPageRange();
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for ($i = $beginPage; $i <= $endPage; ++$i) {
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$buttons[] = $this->renderPageButton($i + 1, $i, null, $this->disableCurrentPageButton && $i == $currentPage, $i == $currentPage);
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}
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// next page
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if ($this->nextPageLabel !== false) {
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if (($page = $currentPage + 1) >= $pageCount - 1) {
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$page = $pageCount - 1;
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}
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$buttons[] = $this->renderPageButton($this->nextPageLabel, $page, $this->nextPageCssClass, $currentPage >= $pageCount - 1, false);
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}
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// last page
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$lastPageLabel = $this->lastPageLabel === true ? $pageCount : $this->lastPageLabel;
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if ($lastPageLabel !== false) {
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$buttons[] = $this->renderPageButton($lastPageLabel, $pageCount - 1, $this->lastPageCssClass, $currentPage >= $pageCount - 1, false);
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}
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$options = $this->options;
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$tag = ArrayHelper::remove($options, 'tag', 'ul');
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return Html::tag($tag, implode("\n", $buttons), $options);
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}
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/**
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* Renders a page button.
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* You may override this method to customize the generation of page buttons.
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* @param string $label the text label for the button
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* @param int $page the page number
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* @param string $class the CSS class for the page button.
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* @param bool $disabled whether this page button is disabled
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* @param bool $active whether this page button is active
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* @return string the rendering result
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*/
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protected function renderPageButton($label, $page, $class, $disabled, $active)
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{
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$options = $this->linkContainerOptions;
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$linkWrapTag = ArrayHelper::remove($options, 'tag', 'li');
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Html::addCssClass($options, empty($class) ? $this->pageCssClass : $class);
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if ($active) {
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Html::addCssClass($options, $this->activePageCssClass);
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}
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if ($disabled) {
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Html::addCssClass($options, $this->disabledPageCssClass);
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$disabledItemOptions = $this->disabledListItemSubTagOptions;
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$tag = ArrayHelper::remove($disabledItemOptions, 'tag', 'span');
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return Html::tag($linkWrapTag, Html::tag($tag, $label, $disabledItemOptions), $options);
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}
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$linkOptions = $this->linkOptions;
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$linkOptions['data-page'] = $page;
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return Html::tag($linkWrapTag, Html::a($label, $this->pagination->createUrl($page), $linkOptions), $options);
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}
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/**
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* @return array the begin and end pages that need to be displayed.
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*/
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protected function getPageRange()
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{
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$currentPage = $this->pagination->getPage();
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$pageCount = $this->pagination->getPageCount();
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$beginPage = max(0, $currentPage - (int) ($this->maxButtonCount / 2));
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if (($endPage = $beginPage + $this->maxButtonCount - 1) >= $pageCount) {
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$endPage = $pageCount - 1;
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$beginPage = max(0, $endPage - $this->maxButtonCount + 1);
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}
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return [$beginPage, $endPage];
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}
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}
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