Austin Riba 26ec71c39d lightbox: Prevent panning image out of view. ...

This commit adds a method to detect whether the draggable element has
moved out of view and if it has, move it back into view.

The panzoom library does have a `bounds` option that is supposed to
provide the functionality, but at the time of the commit it does not
appear to work correctly. Upstream bug:
https://github.com/anvaka/panzoom/issues/112

2022-02-23 12:13:17 -08:00

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