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<?php |
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/** |
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* @author Andrew Coulton <[email protected]> |
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* @copyright 2015 inGenerator Ltd |
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* @license http://kohanaframework.org/license |
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*/ |
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namespace Ingenerator\KohanaView\Renderer; |
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use Ingenerator\KohanaView\Renderer; |
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use Ingenerator\KohanaView\ViewModel\PageContentView; |
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use Ingenerator\KohanaView\ViewModel\PageLayoutView; |
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/** |
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* Renders a PageContentView and - when appropriate - renders the generated output inside a PageLayoutView. By |
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* default it will render the layout on normal requests (or when no request is present) but not on AJAX requests. |
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* This behaviour can be customised by calling the setUseLayout method. |
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* |
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* For example, from a controller: |
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* |
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* public function action_login() |
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* { |
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* $layout = new DefaultPageLayout; |
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* $content = new LoginView($layout); |
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* $renderer = new PageLayoutRenderer(new HTMLRenderer, $this->request); |
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* $this->response->body($renderer->render($content)); |
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* } |
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* |
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* Obviously in real life the creation of the views and renderers would happen in your dependency container. |
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* |
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* @package Ingenerator\KohanaView\Renderer |
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*/ |
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class PageLayoutRenderer |
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{ |
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/** |
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* @var bool Whether to force (or not force) embedding the content in the layout |
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*/ |
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protected $use_layout; |
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/** |
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* @var Renderer |
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*/ |
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protected $view_renderer; |
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/** |
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* @var \Request |
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*/ |
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protected $current_request; |
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public function __construct(Renderer $view_renderer, \Request $current_request = NULL) |
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{ |
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$this->view_renderer = $view_renderer; |
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$this->current_request = $current_request; |
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} |
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/** |
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* @param PageContentView $content_view |
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* |
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* @return string |
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*/ |
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public function render(PageContentView $content_view) |
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{ |
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$content = $this->view_renderer->render($content_view); |
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if ($this->shouldUseLayout()) { |
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return $this->renderInLayout($content_view->var_page(), $content); |
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} else { |
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return $content; |
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} |
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} |
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/** |
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* @return bool |
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*/ |
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protected function shouldUseLayout() |
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{ |
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if ($this->use_layout !== NULL) { |
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return $this->use_layout; |
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} |
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if ($this->current_request AND $this->current_request->is_ajax()) { |
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return FALSE; |
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} else { |
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return TRUE; |
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} |
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} |
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/** |
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* @param PageLayoutView $layout |
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* @param string $content |
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* |
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* @return string |
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*/ |
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protected function renderInLayout(PageLayoutView $layout, $content) |
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{ |
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$layout->setBodyHTML($content); |
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return $this->view_renderer->render($layout); |
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} |
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/** |
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* Configure whether to always wrap the content in the layout (TRUE), never (FALSE) or automatically for |
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* non-AJAX requests (NULL) |
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* |
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* @param bool $use_layout |
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* |
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* @return void |
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*/ |
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public function setUseLayout($use_layout) |
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{ |
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$this->use_layout = $use_layout; |
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} |
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} |
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ingenerator /
kohana-view
PHP has two types of connecting operators (logical operators, and boolean operators):
and&&or||The difference between these is the order in which they are executed. In most cases, you would want to use a boolean operator like
&&, or||.Let’s take a look at a few examples:
Logical Operators are used for Control-Flow
One case where you explicitly want to use logical operators is for control-flow such as this:
Since
dieintroduces problems of its own, f.e. it makes our code hardly testable, and prevents any kind of more sophisticated error handling; you probably do not want to use this in real-world code. Unfortunately, logical operators cannot be combined withthrowat this point:These limitations lead to logical operators rarely being of use in current PHP code.