Emilio Cobos Álvarez 4e68e78542 Bug 1669925 - Add a printing.trigger keyed scalar to record what triggers a particular print dialog. r=jwatt,marionette-reviewers,maja_zf
In order to avoid over/under-counting, we need to treat window.print()
specially. The new UI was using aOpenWindowInfo.isForPrintPreview for
that, but that doesn't quite work for the old UI (because it will
trigger a regular print, not a preview).

But since isForPrintPreview was only really needed to distinguish
window.print(), just rename it and set it to true when the old UI is
triggered by window.print() as well.

Differential Revision: https://phabricator.services.mozilla.com/D92925
2020-10-09 14:59:46 +00:00
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