Thank you for reporting this bug! In bug 1770971 we are tracking long term options/ideas for print settings, so I'll connect it to that bug. For this bug., we could probably do something to intervene during [`onLayout`](https://searchfox.org/mozilla-central/rev/9137f80064364a41a1de394af4ce05dffdbf68e6/mobile/android/geckoview/src/main/java/org/mozilla/geckoview/GeckoViewPrintDocumentAdapter.java#131) in the print adapter when we detect a landscape print request and request Gecko to make a landscape PDF with the appropriate constraints. ([Android `onLayout` docs](https://developer.android.com/reference/android/print/PrintDocumentAdapter#onLayout(android.print.PrintAttributes,%20android.print.PrintAttributes,%20android.os.CancellationSignal,%20android.print.PrintDocumentAdapter.LayoutResultCallback,%20android.os.Bundle)).) However, this idea is still likely dependent on having a way to make Gecko print settings in Java and an API to request Gecko to perform the operation as described in bug 1770971.
Bug 1872249 Comment 3 Edit History
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Thank you for reporting this bug! In bug 1770971, we are tracking long term options/ideas for print settings, so I'll connect it to that bug. For this bug., we could probably do something to intervene during [`onLayout`](https://searchfox.org/mozilla-central/rev/9137f80064364a41a1de394af4ce05dffdbf68e6/mobile/android/geckoview/src/main/java/org/mozilla/geckoview/GeckoViewPrintDocumentAdapter.java#131) in the print adapter when we detect a landscape print request and request Gecko to make a landscape PDF with the appropriate constraints. ([Android `onLayout` docs](https://developer.android.com/reference/android/print/PrintDocumentAdapter#onLayout(android.print.PrintAttributes,%20android.print.PrintAttributes,%20android.os.CancellationSignal,%20android.print.PrintDocumentAdapter.LayoutResultCallback,%20android.os.Bundle)).) However, this idea is still likely dependent on having a way to make Gecko print settings in Java and an API to request Gecko to perform the operation as described in bug 1770971.