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<?php |
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/** |
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* @link https://github.com/DMGPage/yii2-materialize |
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* @copyright Copyright (c) 2018 Dmitrijs Reinmanis |
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* @license https://github.com/DMGPage/yii2-materialize/blob/master/LICENSE |
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*/ |
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namespace dmgpage\yii2materialize\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\helpers\ArrayHelper; |
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use yii\helpers\Html; |
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/** |
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* Breadcrumbs displays a list of links indicating the position of the current page in the whole site hierarchy. |
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* |
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* For example, breadcrumbs like "Home / Sample Post / Edit" means the user is viewing an edit page |
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* for the "Sample Post". He can click on "Sample Post" to view that page, or he can click on "Home" |
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* to return to the homepage. |
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* |
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* To use Breadcrumbs, you need to configure its [[links]] property, which specifies the links to be displayed. For example, |
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* |
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* ```php |
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* echo Breadcrumbs::widget([ |
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* 'links' => [ |
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* [ |
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* 'label' => 'Post Category', |
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* 'url' => ['post-category/view', 'id' => 10] |
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* ], |
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* ['label' => 'Sample Post', 'url' => ['post/edit', 'id' => 1]], |
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* 'Edit', |
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* ], |
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* ]); |
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* ``` |
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* |
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* Because breadcrumbs usually appears in nearly every page of a website, you may consider placing it in a layout view. |
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* You can use a view parameter (e.g. `$this->params['breadcrumbs']`) to configure the links in different |
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* views. In the layout view, you assign this view parameter to the [[links]] property like the following: |
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* |
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* ```php |
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* // $this is the view object currently being used |
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* echo Breadcrumbs::widget([ |
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* 'links' => isset($this->params['breadcrumbs']) ? $this->params['breadcrumbs'] : [], |
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* ]); |
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* ``` |
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*/ |
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class Breadcrumbs extends Widget |
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{ |
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/** |
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* @var array the HTML attributes for the breadcrumb 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 = []; |
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/** |
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* @var array the HTML attributes for the breadcrumb wrapper 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 $wrapperOptions = []; |
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/** |
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* @var array the HTML attributes for the breadcrumb column 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 $columnOptions = []; |
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/** |
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* @var bool whether to HTML-encode the link labels. |
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*/ |
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public $encodeLabels = true; |
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/** |
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* @var array the first hyperlink in the breadcrumbs (called home link). |
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* Please refer to [[links]] on the format of the link. |
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* If this property is not set, it will default to a link pointing to [[\yii\web\Application::homeUrl]] |
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* with the label 'Home'. If this property contains `['render' => false]`, the home link will not be rendered. |
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*/ |
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public $homeLink; |
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/** |
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* @var array list of links to appear in the breadcrumbs. If this property is empty, |
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* the widget will not render anything. Each array element represents a single link in the breadcrumbs |
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* with the following structure: |
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* |
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* ```php |
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* [ |
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* 'label' => 'label of the link', // required |
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* 'url' => 'url of the link' // optional, will be processed by Url::to() |
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* ] |
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* ``` |
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* |
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* If a link is active, you only need to specify its "label", and instead of writing `['label' => $label]`, |
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* you may simply use `$label`. |
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*/ |
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public $links = []; |
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/** |
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* Initialize the widget. |
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*/ |
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public function init() |
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{ |
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if (!isset($this->wrapperOptions['class'])) { |
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Html::addCssClass($this->wrapperOptions, 'nav-wrapper'); |
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} |
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if (!isset($this->columnOptions['class'])) { |
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Html::addCssClass($this->columnOptions, 'col s12'); |
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} |
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} |
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/** |
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* Renders the widget. |
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*/ |
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public function run() |
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{ |
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if (!empty($this->links)) { |
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$links = []; |
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if (empty($this->homeLink)) { |
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$links[] = $this->renderItem( |
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[ |
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'label' => Yii::t('yii', 'Home'), |
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'url' => Yii::$app->homeUrl |
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] |
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); |
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} elseif (!isset($this->homeLink['render']) || $this->homeLink['render'] === true) { |
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$links[] = $this->renderItem($this->homeLink); |
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} |
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foreach ($this->links as $link) { |
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if (!is_array($link)) { |
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$link = ['label' => $link]; |
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} |
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$links[] = $this->renderItem($link); |
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} |
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$column = Html::tag('div', implode('', $links), $this->columnOptions); |
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$wraper = Html::tag('div', $column, $this->wrapperOptions); |
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return Html::tag('nav', $wraper, $this->options); |
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} |
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} |
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/** |
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* Renders a single breadcrumb item. |
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* |
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* @param array $link the link to be rendered. It must contain the "label" element. The "url" element is optional. |
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* @return string the rendering result |
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* @throws InvalidConfigException if `$link` does not have "label" element. |
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*/ |
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protected function renderItem($link) |
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{ |
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$encodeLabel = ArrayHelper::remove($link, 'encode', $this->encodeLabels); |
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if (array_key_exists('label', $link)) { |
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$label = $encodeLabel ? Html::encode($link['label']) : $link['label']; |
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} else { |
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throw new InvalidConfigException('The "label" element is required for each link.'); |
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} |
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$options = $link; |
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unset($options['label'], $options['url']); |
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if (!isset($options['class'])) { |
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Html::addCssClass($options, 'breadcrumb'); |
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} |
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if (isset($link['url'])) { |
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return Html::a($label, $link['url'], $options); |
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} else { |
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return Html::tag('span', $label, $options) ; |
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} |
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} |
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} |
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DMGPage /
yii2-materialize
Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: