Ionic and Photoswipe: retrieve X,Y coordinates on click(tap) on the image

I am developing a project using Photoswipe for Ionic. I need to retrieve the absolute x,y coordinate that it's clicked (or tapped) on the image. To be clearer, I attach a PDF that explains exactly what it's required. As a reference the project where I am working is on Github with the following URL: [login to view URL] In [login to view URL] are indicated the commands to run to compile successfully and try the example project. The project will be considered completed when I am able to: - Get successfully the X,Y coordinates related to the full image size, that it's clicked(or tapped) inside the image