Open Bug 1418357 Opened 7 years ago Updated 2 years ago

PDF re-renders on hide/show toolbars, causing flickering (iPad only)

Categories

(Firefox for iOS :: General, enhancement, P3)

Other
iOS
enhancement

Tracking

()

Tracking Status
fxios 11.0 ---

People

(Reporter: garvan, Unassigned)

Details

On iPad 9.7.
View http://truefiretv.net/rockfield/manuals/RockfieldCatalog2008.pdf
Hide/Show the top toolbar, the screen will blank out as the PDF redraws.
The blanking is ~200ms.

Can't repro on iPhone.
See also https://bugzilla.mozilla.org/show_bug.cgi?id=1417152 which is a PDF rendering crash in WKWebView.
We are disabling hiding the toolbar when showing PDFs to see if this improves the crash rate.
comment 1 longer applies, we will not be disabling toolbar hiding
I think if we modify how we do show/hiding of toolbars on the iPad we can make sure this doesnt happen. 

Instead of resizing the frame of the webview setting a contentOffset on the webviews scrollView allows content to appear below the toolbar without resizing the webview. (this is how safari works)
Priority: P2 → P3
Severity: normal → S3
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