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<?php |
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/* |
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* This file is part of the trefoil application. |
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* |
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* (c) Miguel Angel Gabriel <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Trefoil\Plugins\Optional; |
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use Easybook\Events\EasybookEvents; |
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use Easybook\Events\ParseEvent; |
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use Symfony\Component\EventDispatcher\EventSubscriberInterface; |
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use Trefoil\Plugins\BasePlugin; |
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/** |
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* Add manual title labels to book items. |
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* |
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* For formats: all |
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* |
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* Item labels are rendered with different markup than the title, creating a nice effect, |
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* like "Chapter 1 - The first chapter title" ("Chapter 1" is the label while "The first |
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* chapter title" is the title). |
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* |
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* Automatic labels can be added to item titles by easybook using its labeling mechanism, |
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* but sometimes it could be useful having a way to manually specify labels using markup |
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* in the source file. |
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* |
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* This plugin provides simple markup to achieve just this, just enclosing the label part |
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* in "[[..]]". |
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* |
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* Example: |
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* |
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* # [[Chapter 1]] The first chapter title |
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* |
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*/ |
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class ManualTitleLabelsPlugin extends BasePlugin implements EventSubscriberInterface |
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{ |
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public static function getSubscribedEvents() |
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{ |
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return array( |
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EasybookEvents::POST_PARSE => array('onItemPostParse', -1100) // apter ParserPlugin |
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); |
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} |
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public function onItemPostParse(ParseEvent $event) |
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{ |
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$this->init($event); |
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$this->addTitleLabel(); |
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$event->setItem($this->item); |
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} |
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/** |
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* Look for '[[label]] title' markup in title and update |
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* the item accordingly. |
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*/ |
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protected function addTitleLabel() |
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{ |
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$regExp = '/'; |
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$regExp .= '^\[\[(?<label>.*)\]\] ?(?<title>.*)$'; |
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$regExp .= '/U'; // Ungreedy |
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$item = $this->item; |
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$item['title'] = preg_replace_callback( |
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$regExp, |
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function ($matches) use (&$item) { |
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// the new item label |
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$item['label'] = $matches['label']; |
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// the toc |
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$item['toc'][0]['label'] = $matches['label']; |
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$item['toc'][0]['title'] = $matches['title']; |
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// the new title |
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return $matches['title']; |
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}, |
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$item['title'] |
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); |
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$this->item = $item; |
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} |
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} |
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magabriel /
trefoil
