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686 lines
25 KiB
PHP
686 lines
25 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\web;
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use Yii;
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use yii\base\InvalidConfigException;
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use yii\helpers\ArrayHelper;
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use yii\helpers\Html;
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use yii\helpers\Url;
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/**
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* View represents a view object in the MVC pattern.
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*
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* View provides a set of methods (e.g. [[render()]]) for rendering purpose.
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*
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* View is configured as an application component in [[\yii\base\Application]] by default.
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* You can access that instance via `Yii::$app->view`.
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*
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* You can modify its configuration by adding an array to your application config under `components`
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* as it is shown in the following example:
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*
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* ```php
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* 'view' => [
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* 'theme' => 'app\themes\MyTheme',
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* 'renderers' => [
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* // you may add Smarty or Twig renderer here
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* ]
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* // ...
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* ]
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* ```
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*
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* For more details and usage information on View, see the [guide article on views](guide:structure-views).
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*
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* @property \yii\web\AssetManager $assetManager The asset manager. Defaults to the "assetManager" application
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* component.
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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 View extends \yii\base\View
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{
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/**
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* @event Event an event that is triggered by [[beginBody()]].
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*/
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const EVENT_BEGIN_BODY = 'beginBody';
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/**
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* @event Event an event that is triggered by [[endBody()]].
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*/
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const EVENT_END_BODY = 'endBody';
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/**
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* The location of registered JavaScript code block or files.
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* This means the location is in the head section.
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*/
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const POS_HEAD = 1;
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/**
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* The location of registered JavaScript code block or files.
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* This means the location is at the beginning of the body section.
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*/
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const POS_BEGIN = 2;
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/**
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* The location of registered JavaScript code block or files.
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* This means the location is at the end of the body section.
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*/
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const POS_END = 3;
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/**
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* The location of registered JavaScript code block.
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* This means the JavaScript code block will be enclosed within `jQuery(document).ready()`.
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*/
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const POS_READY = 4;
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/**
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* The location of registered JavaScript code block.
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* This means the JavaScript code block will be enclosed within `jQuery(window).load()`.
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*/
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const POS_LOAD = 5;
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/**
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* This is internally used as the placeholder for receiving the content registered for the head section.
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*/
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const PH_HEAD = '<![CDATA[YII-BLOCK-HEAD]]>';
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/**
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* This is internally used as the placeholder for receiving the content registered for the beginning of the body section.
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*/
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const PH_BODY_BEGIN = '<![CDATA[YII-BLOCK-BODY-BEGIN]]>';
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/**
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* This is internally used as the placeholder for receiving the content registered for the end of the body section.
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*/
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const PH_BODY_END = '<![CDATA[YII-BLOCK-BODY-END]]>';
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/**
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* @var AssetBundle[] list of the registered asset bundles. The keys are the bundle names, and the values
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* are the registered [[AssetBundle]] objects.
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* @see registerAssetBundle()
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*/
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public $assetBundles = [];
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/**
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* @var string the page title
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*/
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public $title;
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/**
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* @var array the registered meta tags.
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* @see registerMetaTag()
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*/
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public $metaTags = [];
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/**
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* @var array the registered link tags.
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* @see registerLinkTag()
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*/
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public $linkTags = [];
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/**
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* @var array the registered CSS code blocks.
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* @see registerCss()
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*/
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public $css = [];
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/**
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* @var array the registered CSS files.
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* @see registerCssFile()
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*/
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public $cssFiles = [];
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/**
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* @var array the registered JS code blocks
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* @see registerJs()
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*/
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public $js = [];
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/**
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* @var array the registered JS files.
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* @see registerJsFile()
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*/
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public $jsFiles = [];
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private $_assetManager;
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/**
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* Whether [[endPage()]] has been called and all files have been registered
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* @var bool
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*/
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private $_isPageEnded = false;
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/**
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* Marks the position of an HTML head section.
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*/
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public function head()
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{
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echo self::PH_HEAD;
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}
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/**
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* Marks the beginning of an HTML body section.
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*/
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public function beginBody()
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{
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echo self::PH_BODY_BEGIN;
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$this->trigger(self::EVENT_BEGIN_BODY);
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}
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/**
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* Marks the ending of an HTML body section.
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*/
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public function endBody()
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{
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$this->trigger(self::EVENT_END_BODY);
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echo self::PH_BODY_END;
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foreach (array_keys($this->assetBundles) as $bundle) {
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$this->registerAssetFiles($bundle);
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}
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}
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/**
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* Marks the ending of an HTML page.
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* @param bool $ajaxMode whether the view is rendering in AJAX mode.
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* If true, the JS scripts registered at [[POS_READY]] and [[POS_LOAD]] positions
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* will be rendered at the end of the view like normal scripts.
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*/
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public function endPage($ajaxMode = false)
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{
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$this->trigger(self::EVENT_END_PAGE);
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$this->_isPageEnded = true;
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$content = ob_get_clean();
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echo strtr($content, [
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self::PH_HEAD => $this->renderHeadHtml(),
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self::PH_BODY_BEGIN => $this->renderBodyBeginHtml(),
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self::PH_BODY_END => $this->renderBodyEndHtml($ajaxMode),
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]);
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$this->clear();
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}
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/**
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* Renders a view in response to an AJAX request.
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*
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* This method is similar to [[render()]] except that it will surround the view being rendered
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* with the calls of [[beginPage()]], [[head()]], [[beginBody()]], [[endBody()]] and [[endPage()]].
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* By doing so, the method is able to inject into the rendering result with JS/CSS scripts and files
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* that are registered with the view.
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*
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* @param string $view the view name. Please refer to [[render()]] on how to specify this parameter.
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* @param array $params the parameters (name-value pairs) that will be extracted and made available in the view file.
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* @param object $context the context that the view should use for rendering the view. If null,
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* existing [[context]] will be used.
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* @return string the rendering result
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* @see render()
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*/
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public function renderAjax($view, $params = [], $context = null)
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{
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$viewFile = $this->findViewFile($view, $context);
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ob_start();
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ob_implicit_flush(false);
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$this->beginPage();
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$this->head();
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$this->beginBody();
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echo $this->renderFile($viewFile, $params, $context);
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$this->endBody();
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$this->endPage(true);
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return ob_get_clean();
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}
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/**
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* Registers the asset manager being used by this view object.
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* @return \yii\web\AssetManager the asset manager. Defaults to the "assetManager" application component.
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*/
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public function getAssetManager()
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{
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return $this->_assetManager ?: Yii::$app->getAssetManager();
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}
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/**
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* Sets the asset manager.
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* @param \yii\web\AssetManager $value the asset manager
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*/
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public function setAssetManager($value)
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{
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$this->_assetManager = $value;
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}
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/**
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* Clears up the registered meta tags, link tags, css/js scripts and files.
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*/
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public function clear()
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{
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$this->metaTags = [];
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$this->linkTags = [];
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$this->css = [];
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$this->cssFiles = [];
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$this->js = [];
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$this->jsFiles = [];
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$this->assetBundles = [];
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}
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/**
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* Registers all files provided by an asset bundle including depending bundles files.
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* Removes a bundle from [[assetBundles]] once files are registered.
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* @param string $name name of the bundle to register
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*/
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protected function registerAssetFiles($name)
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{
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if (!isset($this->assetBundles[$name])) {
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return;
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}
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$bundle = $this->assetBundles[$name];
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if ($bundle) {
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foreach ($bundle->depends as $dep) {
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$this->registerAssetFiles($dep);
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}
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$bundle->registerAssetFiles($this);
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}
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unset($this->assetBundles[$name]);
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}
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/**
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* Registers the named asset bundle.
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* All dependent asset bundles will be registered.
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* @param string $name the class name of the asset bundle (without the leading backslash)
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* @param int|null $position if set, this forces a minimum position for javascript files.
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* This will adjust depending assets javascript file position or fail if requirement can not be met.
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* If this is null, asset bundles position settings will not be changed.
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* See [[registerJsFile]] for more details on javascript position.
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* @return AssetBundle the registered asset bundle instance
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* @throws InvalidConfigException if the asset bundle does not exist or a circular dependency is detected
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*/
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public function registerAssetBundle($name, $position = null)
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{
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if (!isset($this->assetBundles[$name])) {
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$am = $this->getAssetManager();
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$bundle = $am->getBundle($name);
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$this->assetBundles[$name] = false;
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// register dependencies
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$pos = isset($bundle->jsOptions['position']) ? $bundle->jsOptions['position'] : null;
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foreach ($bundle->depends as $dep) {
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$this->registerAssetBundle($dep, $pos);
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}
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$this->assetBundles[$name] = $bundle;
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} elseif ($this->assetBundles[$name] === false) {
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throw new InvalidConfigException("A circular dependency is detected for bundle '$name'.");
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} else {
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$bundle = $this->assetBundles[$name];
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}
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if ($position !== null) {
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$pos = isset($bundle->jsOptions['position']) ? $bundle->jsOptions['position'] : null;
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if ($pos === null) {
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$bundle->jsOptions['position'] = $pos = $position;
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} elseif ($pos > $position) {
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throw new InvalidConfigException("An asset bundle that depends on '$name' has a higher javascript file position configured than '$name'.");
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}
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// update position for all dependencies
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foreach ($bundle->depends as $dep) {
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$this->registerAssetBundle($dep, $pos);
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}
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}
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return $bundle;
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}
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/**
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* Registers a meta tag.
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*
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* For example, a description meta tag can be added like the following:
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*
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* ```php
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* $view->registerMetaTag([
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* 'name' => 'description',
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* 'content' => 'This website is about funny raccoons.'
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* ]);
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* ```
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*
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* will result in the meta tag `<meta name="description" content="This website is about funny raccoons.">`.
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*
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* @param array $options the HTML attributes for the meta tag.
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* @param string $key the key that identifies the meta tag. If two meta tags are registered
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* with the same key, the latter will overwrite the former. If this is null, the new meta tag
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* will be appended to the existing ones.
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*/
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public function registerMetaTag($options, $key = null)
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{
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if ($key === null) {
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$this->metaTags[] = Html::tag('meta', '', $options);
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} else {
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$this->metaTags[$key] = Html::tag('meta', '', $options);
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}
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}
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/**
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* Registers CSRF meta tags.
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* They are rendered dynamically to retrieve a new CSRF token for each request.
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*
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* ```php
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* $view->registerCsrfMetaTags();
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* ```
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*
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* The above code will result in `<meta name="csrf-param" content="[yii\web\Request::$csrfParam]">`
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* and `<meta name="csrf-token" content="tTNpWKpdy-bx8ZmIq9R72...K1y8IP3XGkzZA==">` added to the page.
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*
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* Note: Hidden CSRF input of ActiveForm will be automatically refreshed by calling `window.yii.refreshCsrfToken()`
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* from `yii.js`.
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*
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* @since 2.0.13
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*/
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public function registerCsrfMetaTags()
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{
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$this->metaTags['csrf_meta_tags'] = $this->renderDynamic('return yii\helpers\Html::csrfMetaTags();');
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}
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/**
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* Registers a link tag.
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*
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* For example, a link tag for a custom [favicon](http://www.w3.org/2005/10/howto-favicon)
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* can be added like the following:
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*
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* ```php
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* $view->registerLinkTag(['rel' => 'icon', 'type' => 'image/png', 'href' => '/myicon.png']);
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* ```
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*
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* which will result in the following HTML: `<link rel="icon" type="image/png" href="/myicon.png">`.
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*
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* **Note:** To register link tags for CSS stylesheets, use [[registerCssFile()]] instead, which
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* has more options for this kind of link tag.
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*
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* @param array $options the HTML attributes for the link tag.
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* @param string $key the key that identifies the link tag. If two link tags are registered
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* with the same key, the latter will overwrite the former. If this is null, the new link tag
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* will be appended to the existing ones.
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*/
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public function registerLinkTag($options, $key = null)
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{
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if ($key === null) {
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$this->linkTags[] = Html::tag('link', '', $options);
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} else {
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$this->linkTags[$key] = Html::tag('link', '', $options);
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}
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}
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/**
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* Registers a CSS code block.
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* @param string $css the content of the CSS code block to be registered
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* @param array $options the HTML attributes for the `<style>`-tag.
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* @param string $key the key that identifies the CSS code block. If null, it will use
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* $css as the key. If two CSS code blocks are registered with the same key, the latter
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* will overwrite the former.
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*/
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public function registerCss($css, $options = [], $key = null)
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{
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$key = $key ?: md5($css);
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$this->css[$key] = Html::style($css, $options);
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}
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/**
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* Registers a CSS file.
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*
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* This method should be used for simple registration of CSS files. If you want to use features of
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* [[AssetManager]] like appending timestamps to the URL and file publishing options, use [[AssetBundle]]
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* and [[registerAssetBundle()]] instead.
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*
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* @param string $url the CSS file to be registered.
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* @param array $options the HTML attributes for the link tag. Please refer to [[Html::cssFile()]] for
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* the supported options. The following options are specially handled and are not treated as HTML attributes:
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*
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* - `depends`: array, specifies the names of the asset bundles that this CSS file depends on.
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* - `appendTimestamp`: bool whether to append a timestamp to the URL.
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*
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* @param string $key the key that identifies the CSS script file. If null, it will use
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* $url as the key. If two CSS files are registered with the same key, the latter
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* will overwrite the former.
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* @throws InvalidConfigException
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*/
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public function registerCssFile($url, $options = [], $key = null)
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{
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$this->registerFile('css', $url, $options, $key);
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}
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/**
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* Registers a JS code block.
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* @param string $js the JS code block to be registered
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* @param int $position the position at which the JS script tag should be inserted
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* in a page. The possible values are:
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*
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* - [[POS_HEAD]]: in the head section
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* - [[POS_BEGIN]]: at the beginning of the body section
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* - [[POS_END]]: at the end of the body section
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* - [[POS_LOAD]]: enclosed within jQuery(window).load().
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* Note that by using this position, the method will automatically register the jQuery js file.
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* - [[POS_READY]]: enclosed within jQuery(document).ready(). This is the default value.
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* Note that by using this position, the method will automatically register the jQuery js file.
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*
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* @param string $key the key that identifies the JS code block. If null, it will use
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* $js as the key. If two JS code blocks are registered with the same key, the latter
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* will overwrite the former.
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*/
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public function registerJs($js, $position = self::POS_READY, $key = null)
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{
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$key = $key ?: md5($js);
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$this->js[$position][$key] = $js;
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if ($position === self::POS_READY || $position === self::POS_LOAD) {
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JqueryAsset::register($this);
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}
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}
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/**
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* Registers a JS or CSS file.
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*
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* @param string $url the JS file to be registered.
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* @param string $type type (js or css) of the file.
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* @param array $options the HTML attributes for the script tag. The following options are specially handled
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* and are not treated as HTML attributes:
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*
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* - `depends`: array, specifies the names of the asset bundles that this CSS file depends on.
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* - `appendTimestamp`: bool whether to append a timestamp to the URL.
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*
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* @param string $key the key that identifies the JS script file. If null, it will use
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* $url as the key. If two JS files are registered with the same key at the same position, the latter
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* will overwrite the former. Note that position option takes precedence, thus files registered with the same key,
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* but different position option will not override each other.
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* @throws InvalidConfigException
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*/
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private function registerFile($type, $url, $options = [], $key = null)
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{
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$url = Yii::getAlias($url);
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$key = $key ?: $url;
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$depends = ArrayHelper::remove($options, 'depends', []);
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$originalOptions = $options;
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$position = ArrayHelper::remove($options, 'position', self::POS_END);
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try {
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$assetManagerAppendTimestamp = $this->getAssetManager()->appendTimestamp;
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} catch (InvalidConfigException $e) {
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$depends = null; // the AssetManager is not available
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$assetManagerAppendTimestamp = false;
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}
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$appendTimestamp = ArrayHelper::remove($options, 'appendTimestamp', $assetManagerAppendTimestamp);
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if ($this->_isPageEnded) {
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Yii::warning('You\'re trying to register a file after View::endPage() has been called');
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}
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if (empty($depends)) {
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// register directly without AssetManager
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if ($appendTimestamp && Url::isRelative($url)) {
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|
$prefix = Yii::getAlias('@web');
|
|
$prefixLength = strlen($prefix);
|
|
$trimmedUrl = ltrim((substr($url, 0, $prefixLength) === $prefix) ? substr($url, $prefixLength) : $url, '/');
|
|
$timestamp = @filemtime(Yii::getAlias('@webroot/' . $trimmedUrl, false));
|
|
if ($timestamp > 0) {
|
|
$url = $timestamp ? "$url?v=$timestamp" : $url;
|
|
}
|
|
}
|
|
if ($type === 'js') {
|
|
$this->jsFiles[$position][$key] = Html::jsFile($url, $options);
|
|
} else {
|
|
$this->cssFiles[$key] = Html::cssFile($url, $options);
|
|
}
|
|
} else {
|
|
$this->getAssetManager()->bundles[$key] = Yii::createObject([
|
|
'class' => AssetBundle::className(),
|
|
'baseUrl' => '',
|
|
'basePath' => '@webroot',
|
|
(string)$type => [ArrayHelper::merge([!Url::isRelative($url) ? $url : ltrim($url, '/')], $originalOptions)],
|
|
"{$type}Options" => $options,
|
|
'depends' => (array)$depends,
|
|
]);
|
|
$this->registerAssetBundle($key);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Registers a JS file.
|
|
*
|
|
* This method should be used for simple registration of JS files. If you want to use features of
|
|
* [[AssetManager]] like appending timestamps to the URL and file publishing options, use [[AssetBundle]]
|
|
* and [[registerAssetBundle()]] instead.
|
|
*
|
|
* @param string $url the JS file to be registered.
|
|
* @param array $options the HTML attributes for the script tag. The following options are specially handled
|
|
* and are not treated as HTML attributes:
|
|
*
|
|
* - `depends`: array, specifies the names of the asset bundles that this JS file depends on.
|
|
* - `position`: specifies where the JS script tag should be inserted in a page. The possible values are:
|
|
* * [[POS_HEAD]]: in the head section
|
|
* * [[POS_BEGIN]]: at the beginning of the body section
|
|
* * [[POS_END]]: at the end of the body section. This is the default value.
|
|
* - `appendTimestamp`: bool whether to append a timestamp to the URL.
|
|
*
|
|
* Please refer to [[Html::jsFile()]] for other supported options.
|
|
*
|
|
* @param string $key the key that identifies the JS script file. If null, it will use
|
|
* $url as the key. If two JS files are registered with the same key at the same position, the latter
|
|
* will overwrite the former. Note that position option takes precedence, thus files registered with the same key,
|
|
* but different position option will not override each other.
|
|
* @throws InvalidConfigException
|
|
*/
|
|
public function registerJsFile($url, $options = [], $key = null)
|
|
{
|
|
$this->registerFile('js', $url, $options, $key);
|
|
}
|
|
|
|
/**
|
|
* Registers a JS code block defining a variable. The name of variable will be
|
|
* used as key, preventing duplicated variable names.
|
|
*
|
|
* @param string $name Name of the variable
|
|
* @param array|string $value Value of the variable
|
|
* @param int $position the position in a page at which the JavaScript variable should be inserted.
|
|
* The possible values are:
|
|
*
|
|
* - [[POS_HEAD]]: in the head section. This is the default value.
|
|
* - [[POS_BEGIN]]: at the beginning of the body section.
|
|
* - [[POS_END]]: at the end of the body section.
|
|
* - [[POS_LOAD]]: enclosed within jQuery(window).load().
|
|
* Note that by using this position, the method will automatically register the jQuery js file.
|
|
* - [[POS_READY]]: enclosed within jQuery(document).ready().
|
|
* Note that by using this position, the method will automatically register the jQuery js file.
|
|
*
|
|
* @since 2.0.14
|
|
*/
|
|
public function registerJsVar($name, $value, $position = self::POS_HEAD)
|
|
{
|
|
$js = sprintf('var %s = %s;', $name, \yii\helpers\Json::htmlEncode($value));
|
|
$this->registerJs($js, $position, $name);
|
|
}
|
|
|
|
/**
|
|
* Renders the content to be inserted in the head section.
|
|
* The content is rendered using the registered meta tags, link tags, CSS/JS code blocks and files.
|
|
* @return string the rendered content
|
|
*/
|
|
protected function renderHeadHtml()
|
|
{
|
|
$lines = [];
|
|
if (!empty($this->metaTags)) {
|
|
$lines[] = implode("\n", $this->metaTags);
|
|
}
|
|
|
|
if (!empty($this->linkTags)) {
|
|
$lines[] = implode("\n", $this->linkTags);
|
|
}
|
|
if (!empty($this->cssFiles)) {
|
|
$lines[] = implode("\n", $this->cssFiles);
|
|
}
|
|
if (!empty($this->css)) {
|
|
$lines[] = implode("\n", $this->css);
|
|
}
|
|
if (!empty($this->jsFiles[self::POS_HEAD])) {
|
|
$lines[] = implode("\n", $this->jsFiles[self::POS_HEAD]);
|
|
}
|
|
if (!empty($this->js[self::POS_HEAD])) {
|
|
$lines[] = Html::script(implode("\n", $this->js[self::POS_HEAD]));
|
|
}
|
|
|
|
return empty($lines) ? '' : implode("\n", $lines);
|
|
}
|
|
|
|
/**
|
|
* Renders the content to be inserted at the beginning of the body section.
|
|
* The content is rendered using the registered JS code blocks and files.
|
|
* @return string the rendered content
|
|
*/
|
|
protected function renderBodyBeginHtml()
|
|
{
|
|
$lines = [];
|
|
if (!empty($this->jsFiles[self::POS_BEGIN])) {
|
|
$lines[] = implode("\n", $this->jsFiles[self::POS_BEGIN]);
|
|
}
|
|
if (!empty($this->js[self::POS_BEGIN])) {
|
|
$lines[] = Html::script(implode("\n", $this->js[self::POS_BEGIN]));
|
|
}
|
|
|
|
return empty($lines) ? '' : implode("\n", $lines);
|
|
}
|
|
|
|
/**
|
|
* Renders the content to be inserted at the end of the body section.
|
|
* The content is rendered using the registered JS code blocks and files.
|
|
* @param bool $ajaxMode whether the view is rendering in AJAX mode.
|
|
* If true, the JS scripts registered at [[POS_READY]] and [[POS_LOAD]] positions
|
|
* will be rendered at the end of the view like normal scripts.
|
|
* @return string the rendered content
|
|
*/
|
|
protected function renderBodyEndHtml($ajaxMode)
|
|
{
|
|
$lines = [];
|
|
|
|
if (!empty($this->jsFiles[self::POS_END])) {
|
|
$lines[] = implode("\n", $this->jsFiles[self::POS_END]);
|
|
}
|
|
|
|
if ($ajaxMode) {
|
|
$scripts = [];
|
|
if (!empty($this->js[self::POS_END])) {
|
|
$scripts[] = implode("\n", $this->js[self::POS_END]);
|
|
}
|
|
if (!empty($this->js[self::POS_READY])) {
|
|
$scripts[] = implode("\n", $this->js[self::POS_READY]);
|
|
}
|
|
if (!empty($this->js[self::POS_LOAD])) {
|
|
$scripts[] = implode("\n", $this->js[self::POS_LOAD]);
|
|
}
|
|
if (!empty($scripts)) {
|
|
$lines[] = Html::script(implode("\n", $scripts));
|
|
}
|
|
} else {
|
|
if (!empty($this->js[self::POS_END])) {
|
|
$lines[] = Html::script(implode("\n", $this->js[self::POS_END]));
|
|
}
|
|
if (!empty($this->js[self::POS_READY])) {
|
|
$js = "jQuery(function ($) {\n" . implode("\n", $this->js[self::POS_READY]) . "\n});";
|
|
$lines[] = Html::script($js);
|
|
}
|
|
if (!empty($this->js[self::POS_LOAD])) {
|
|
$js = "jQuery(window).on('load', function () {\n" . implode("\n", $this->js[self::POS_LOAD]) . "\n});";
|
|
$lines[] = Html::script($js);
|
|
}
|
|
}
|
|
|
|
return empty($lines) ? '' : implode("\n", $lines);
|
|
}
|
|
}
|