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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\widgets;
use Yii;
use yii\base\Widget;
use yii\helpers\ArrayHelper;
use yii\helpers\Html;
use yii\helpers\Json;
use yii\web\Response;
/**
* Pjax is a widget integrating the [pjax](https://github.com/yiisoft/jquery-pjax) jQuery plugin.
*
* Pjax only deals with the content enclosed between its [[begin()]] and [[end()]] calls, called the *body content* of the widget.
* By default, any link click or form submission (for those forms with `data-pjax` attribute) within the body content
* will trigger an AJAX request. In responding to the AJAX request, Pjax will send the updated body content (based
* on the AJAX request) to the client which will replace the old content with the new one. The browser's URL will then
* be updated using pushState. The whole process requires no reloading of the layout or resources (js, css).
*
* You may configure [[linkSelector]] to specify which links should trigger pjax, and configure [[formSelector]]
* to specify which form submission may trigger pjax.
*
* You may disable pjax for a specific link inside the container by adding `data-pjax="0"` attribute to this link.
*
* The following example shows how to use Pjax with the [[\yii\grid\GridView]] widget so that the grid pagination,
* sorting and filtering can be done via pjax:
*
* ```php
* use yii\widgets\Pjax;
*
* Pjax::begin();
* echo GridView::widget([...]);
* Pjax::end();
* ```
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class Pjax extends Widget
{
/**
* @var array the HTML attributes for the widget container tag. The following special options are recognized:
*
* - `tag`: string, the tag name for the container. Defaults to `div`
* This option is available since version 2.0.7.
* See also [[\yii\helpers\Html::tag()]].
*
* @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
*/
public $options = [];
/**
* @var string|false the jQuery selector of the links that should trigger pjax requests.
* If not set, all links within the enclosed content of Pjax will trigger pjax requests.
* If set to false, no code will be registered to handle links.
* Note that if the response to the pjax request is a full page, a normal request will be sent again.
*/
public $linkSelector;
/**
* @var string|false the jQuery selector of the forms whose submissions should trigger pjax requests.
* If not set, all forms with `data-pjax` attribute within the enclosed content of Pjax will trigger pjax requests.
* If set to false, no code will be registered to handle forms.
* Note that if the response to the pjax request is a full page, a normal request will be sent again.
*/
public $formSelector;
/**
* @var string The jQuery event that will trigger form handler. Defaults to "submit".
* @since 2.0.9
*/
public $submitEvent = 'submit';
/**
* @var bool whether to enable push state.
*/
public $enablePushState = true;
/**
* @var bool whether to enable replace state.
*/
public $enableReplaceState = false;
/**
* @var int pjax timeout setting (in milliseconds). This timeout is used when making AJAX requests.
* Use a bigger number if your server is slow. If the server does not respond within the timeout,
* a full page load will be triggered.
*/
public $timeout = 1000;
/**
* @var bool|int how to scroll the page when pjax response is received. If false, no page scroll will be made.
* Use a number if you want to scroll to a particular place.
*/
public $scrollTo = false;
/**
* @var array additional options to be passed to the pjax JS plugin. Please refer to the
* [pjax project page](https://github.com/yiisoft/jquery-pjax) for available options.
*/
public $clientOptions;
/**
* {@inheritdoc}
* @internal
*/
public static $counter = 0;
/**
* {@inheritdoc}
*/
public static $autoIdPrefix = 'p';
/**
* {@inheritdoc}
*/
public function init()
{
parent::init();
if (!isset($this->options['id'])) {
$this->options['id'] = $this->getId();
}
if ($this->requiresPjax()) {
ob_start();
ob_implicit_flush(false);
$view = $this->getView();
$view->clear();
$view->beginPage();
$view->head();
$view->beginBody();
if ($view->title !== null) {
echo Html::tag('title', Html::encode($view->title));
}
} else {
$options = $this->options;
$tag = ArrayHelper::remove($options, 'tag', 'div');
echo Html::beginTag($tag, array_merge([
'data-pjax-container' => '',
'data-pjax-push-state' => $this->enablePushState,
'data-pjax-replace-state' => $this->enableReplaceState,
'data-pjax-timeout' => $this->timeout,
'data-pjax-scrollto' => $this->scrollTo,
], $options));
}
}
/**
* {@inheritdoc}
*/
public function run()
{
if (!$this->requiresPjax()) {
echo Html::endTag(ArrayHelper::remove($this->options, 'tag', 'div'));
$this->registerClientScript();
return;
}
$view = $this->getView();
$view->endBody();
$view->endPage(true);
$content = ob_get_clean();
// only need the content enclosed within this widget
$response = Yii::$app->getResponse();
$response->clearOutputBuffers();
$response->setStatusCode(200);
$response->format = Response::FORMAT_HTML;
$response->content = $content;
$response->headers->setDefault('X-Pjax-Url', Yii::$app->request->url);
$response->send();
Yii::$app->end();
}
/**
* @return bool whether the current request requires pjax response from this widget
*/
protected function requiresPjax()
{
$headers = Yii::$app->getRequest()->getHeaders();
return $headers->get('X-Pjax') && explode(' ', $headers->get('X-Pjax-Container'))[0] === '#' . $this->options['id'];
}
/**
* Registers the needed JavaScript.
*/
public function registerClientScript()
{
$id = $this->options['id'];
$this->clientOptions['push'] = $this->enablePushState;
$this->clientOptions['replace'] = $this->enableReplaceState;
$this->clientOptions['timeout'] = $this->timeout;
$this->clientOptions['scrollTo'] = $this->scrollTo;
if (!isset($this->clientOptions['container'])) {
$this->clientOptions['container'] = "#$id";
}
$options = Json::htmlEncode($this->clientOptions);
$js = '';
if ($this->linkSelector !== false) {
$linkSelector = Json::htmlEncode($this->linkSelector !== null ? $this->linkSelector : '#' . $id . ' a');
$js .= "jQuery(document).pjax($linkSelector, $options);";
}
if ($this->formSelector !== false) {
$formSelector = Json::htmlEncode($this->formSelector !== null ? $this->formSelector : '#' . $id . ' form[data-pjax]');
$submitEvent = Json::htmlEncode($this->submitEvent);
$js .= "\njQuery(document).on($submitEvent, $formSelector, function (event) {jQuery.pjax.submit(event, $options);});";
}
$view = $this->getView();
PjaxAsset::register($view);
if ($js !== '') {
$view->registerJs($js);
}
}
}