figcaption: Adds figcaption

Wraps images with longdesc attribute in a figure
elements and adds a figcaption element with the
longdesc text.

Author: laurensmartina

index.php

@@ -125,6 +125,7 @@
 	if ($hyphaPage) processCommandResult($hyphaPage->process($O_O->getRequest()));
 
 	registerPostProcessingFunction('dewikify');
+	registerPostProcessingFunction('add_captions_to_all_images');
 
 	// add hypha commands and navigation
 	$_cmds[] = '<a class="index" href="index/'.$hyphaLanguage.'">'.__('index').'</a>';

system/core/pages.php

@@ -601,6 +601,22 @@ function wikify_link($node) {
 			$node->text('');
 	}
 
+	function add_captions_to_all_images($element) {
+		foreach ($element->findXPath(".//img[@longdesc]") as $img) {
+			add_caption_to_image($img);
+		}
+	}
+
+	function add_caption_to_image($img) {
+		$figure = new DOMWrap\Element('figure');
+		$img->parentNode->insertBefore($figure, $img);
+		$figure->append($img);
+		$text = $img->getAttribute('longdesc');
+		/** @var DOMWrap\Element $html */
+        $caption = new DOMWrap\Element('figcaption', $text);
+		$figure->append($caption);
+	}
+
 	/*
 		Function: versionSelector
 		generate html select element with available revisions for given page