XFA - Add support to print XFA forms

[calixteman]

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[calixteman]

@Snuffleupagus, I tried to implement print stuff in firefox_print_service.js but I'm kind of stuck.
The only idea I had is to try to fallback on pdf_print_servive.js in case of xfa document since I don't render xfa on a canvas: is it a good idea or not ?

[Snuffleupagus]

I tried to implement print stuff in firefox_print_service.js but I'm kind of stuck.

Stuck how, what did/didn't work?

is it a good idea or not ?

Not really, since that code isn't actually bundled in MOZCENTRAL-builds (and switching between two separate implementations at runtime feels messy).

[calixteman]

I tried to implement print stuff in firefox_print_service.js but I'm kind of stuck.

Stuck how, what did/didn't work?

I copied/pasted the code I wrote for pdf_print_service.js (in renderPage) at the beginning of composePage but the printed pages are white.
My guess is that the "rendering" is not sync so the printed html doesn't contain the html for each page.
So ideally we should block until all the promises are resolved before returning from composePage but afaik it isn't possible.

is it a good idea or not ?

Not really, since that code isn't actually bundled in MOZCENTRAL-builds (and switching between two separate implementations at runtime feels messy).