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#1593 Double Clicking in Tahoe 26.2 Causes Page to Jump
Summary:
After updating to Tahoe 26.2, double clicking text in a PDF, for example to highlight and copy text, causes page to jump. This did not occur in previous Mac OS releases.
Steps to Reproduce:
(1) Open a PDF file in any scroll mode (single page, single page continuous, etc)
(2) Double click some text to highlight it
Expected Result:
- On previous MacOS release, the text would highlight, page would stay still
Actual Result:
- The page randomly scrolls a bit, and the text does not highlight
Configuration:
- Hardware is MacOS Studio
- SW is Tahoe 26.2
- Skim 1.7.11 (163)
Regression Range:
- Prior MacOS with same Skim version did not have the problem on this same system
- Behavior started occuring after updating to Tahoe
This is probably related to bug # 1591. Unfortunately, there is nothing we can do, as selecting text is fully handled by Apple's PDFKit. Which should also be clear from the fact that this happens on an OS update, not an app update. So it is their bug, and they are the only one able to fix this.
Interesting, thanks for reviewing. One comment on your message though. I would assume Apple's PDFKit also handles text selection in Preview,
But Preview does not have this same issue.
I know, and I have no idea what is going on with this. But I do know that we don't do anything when you are selecting text (we check for some tool modes, but when selecting text this passes through to PDFKit's implementation). And we also have no code for automatic scrolling that could ever cause this. So it must be PDFKit's code that causes this. On the other hand, I do know that Preview overrides some scrolling and navigation from PDFKit, as it does not behave the same as vanilla PDFKit in some cases (for instance, when scrolling using page down in single page mode while zoomed in, Preview scrolls to the top of the next page, while vanilla PDFKit scrolls to the bottom). So Apple is quite selfish, fixing their bugs only for themselves, and not for others.