New PDF Embed API: prevent fullscreen prompt for sized containers on mobile

[EmbedAPIUser]

Hi,

I just transitioned from the legacy Embed API to the new modern PDF viewer on my educational website. I use the API to display a pdf in SIZED_CONTAINER mode but otherwise control all aspects of navigation myself as the PDF is a background for a complex interactive educational module with many other overlying HTML elements. 

In the legacy API, this worked very well. However, with the modern API, on mobile, there is an automatic prompt in the center of the PDF element to enter fullscreen which is undesirable since my users can't interact with the PDF element directly. Is there any way to disable this automatic prompt or add an option to disable this? Setting the showFullScreen configuration to false does not prevent the prompt in mobile, just removes the fullscreen button from the bottom toolbar.

Thank you

[Raymond Camden]

I did a quick test using our online demo (https://documentcloud.adobe.com/view-sdk-demo/index.html#/view/SIZED_CONTAINER/Bodea%20Brochure.pdf) and devtools to emulate an iPhone and I wasn't able to reproduce this. Can you share the URL to your site so I can see?

[EmbedAPIUser]

Thank you for the reply. I can actually see the issue in the online demo you provided as well. You can use this link to see my website usage in action: edneurorad.com/spinal-cord-lesions/. This works fine in desktop/tablet mode and even if you start the webpage in desktop mode and then emulate a phone using devtools. It only occurs if you actually use a phone to load the page (but I can replicate the issue if I emulate a phone in devtools and then reload the page). See snapshot below, notice the fullscreen button forced in the middle of the screen which is the pdf element (all other buttons are my own custom controls for the educational module):

[EmbedAPIUser]

Just as an FYI, I switched my website for the time being to using PDF.js, it was easy enough to change. I still would prefer to use the official Adobe Embed API but the SIZED_CONTAINER in the new modern version is not usable. I sincerely hope you give developers a configuration option (i.e. disableFullScreenPrompt or something to that effect) to disable the default behavior of SIZED_CONTAINER in mobile which basically demands fullscreen mode in a somewhat intrusive way. I think it's perfectly fine for the default behavior to stay as is but ideally you would allow developers to override it. It frankly seems like a very easy configuration to implement, since you just have to do what you do on desktop already.

[Raymond Camden]

Gotcha - sorry we weren't able to get this to work properly for you.

[jthomperoo]

Hi, I'm hitting into this exact same issue, on mobile devices that full screen prompt appears and must be opened to view the document. It would be nice if I could disable this prompt.

Thanks for the useful library!

[Raymond Camden]

Sorry, all I could suggest is maybe trying FULL_WINDOW.