HFP-1407 Improve robustness of content-id retrival
The code made an assumption that the $element.parent() would contain the [data-content-id] which isn't always true. Changed the code, so that it looks up the parent with [data-content-id].pull/42/head
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@ -501,7 +501,8 @@ H5P.fullScreen = function ($element, instance, exitCallback, body, forceSemiFull
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// We're called from an iframe.
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$body = H5P.jQuery(body);
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$classes = $body.add($element.get());
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var iframeSelector = '#h5p-iframe-' + $element.parent().data('content-id');
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var contentId = $element.closest('[data-content-id]').data('content-id');
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var iframeSelector = '#h5p-iframe-' + contentId;
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$iframe = H5P.jQuery(iframeSelector);
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$element = $iframe.parent(); // Put iframe wrapper in fullscreen, not container.
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}
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