Support touch events

[vyv03354]

Currently pdf.js is disabled on Metrofox due to the lack of the touch support.
https://bugzilla.mozilla.org/show_bug.cgi?id=859579

[Snuffleupagus]

Work is being done on enabling some touch events (currently pinch to zoom), see PR #3708.
I assume that more touch events could easily be added, either in that PR or in follow-up patches, once the basic functionality exists.

[timvandermeij]

Yes, more events can be added easily. See timvandermeij@fe70904#diff-7e1a90662d6b7cb341f0a762ed9a5561R17 for a comprehensive list. transform is used for pinch to zoom.

I could use some help with this PR as I can't figure out why it only works when I add the alert() statement at timvandermeij@fe70904#diff-dd42e9b2d2a652b8e312efa567698aa6R139. Brendan was also confused about this problem. Any ideas are welcome to be posted in that PR.

[MickL]

Any news on this? Especially pinch to zoom? (The PR is closed btw)

[Snuffleupagus]

Currently pdf.js is disabled on Metrofox due to the lack of the touch support.

Given that "Metrofox" is no longer a thing, and that touch-zooming is already tracked elsewhere; let's close this as a duplicate of issue #2582 instead.