[webkit-reviews] review granted: [Bug 194924] REGRESSION(PSON) Scroll position is sometimes not restored on history navigation : [Attachment 362689] Patch
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Fri Feb 22 10:15:54 PST 2019
Geoffrey Garen <ggaren at apple.com> has granted Chris Dumez <cdumez at apple.com>'s
request for review:
Bug 194924: REGRESSION(PSON) Scroll position is sometimes not restored on
history navigation
https://bugs.webkit.org/show_bug.cgi?id=194924
Attachment 362689: Patch
https://bugs.webkit.org/attachment.cgi?id=362689&action=review
--- Comment #19 from Geoffrey Garen <ggaren at apple.com> ---
Comment on attachment 362689
--> https://bugs.webkit.org/attachment.cgi?id=362689
Patch
View in context: https://bugs.webkit.org/attachment.cgi?id=362689&action=review
r=me
> Source/WebKit/ChangeLog:10
> + call restoreSessionInternal() to restore the HistoryItems based on
the UIProcess'
UIProcess's
> Source/WebKit/ChangeLog:12
> + updates back to the UIProcess. Without PSON, this would be
unnecessary but harmless.
When did this ever happen without PSON? (I think only PSON creates a new
WebPage for backforward navigation.)
> Source/WebKit/WebProcess/WebPage/WebPage.cpp:2705
> + // Since we're merely restoring HistoryItems from the UIProcess, there
is no need to send HistoryItem update notifications back to the UIProcess.
I would comment more strongly: Avoid sending HistoryItem updates to the
UIProcess because we may overwrite important in-flight state from the UI
process (like scroll position).
> Tools/TestWebKitAPI/Tests/WebKitCocoa/ProcessSwapOnNavigation.mm:4816
> +// Pages with dedicated workers do not go into page cache.
> +var myWorker = new Worker('worker.js');
Seems like it would be nice to add window.internals.disablePageCache() for
cases like this.
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