RESOLVED CONFIGURATION CHANGED 21722
REGRESSION: Graphical corruption when scrolling with middle mouse button 
https://bugs.webkit.org/show_bug.cgi?id=21722
Summary REGRESSION: Graphical corruption when scrolling with middle mouse button
Robert Xiao
Reported 2008-10-17 18:38:43 PDT
Scrolling using the middle mouse button causes chunks of the page to be replicated at the wrong places. The wrong pieces are deposited near the pointer. Steps to reproduce: 1) Go to any webpage that can be scrolled (horizontally, vertically or both) 2) Push the middle mouse button to invoke scrolling mode 3) Move the mouse to scroll in any direction Result: chunks of the page are improperly duplicated, resulting in what appears to be graphical corruption Expected result: page renders properly as it is scrolled This was tested on WebKit r37604 (nightly, Oct 15 2008).
Attachments
Screenshot of bug after scrolling slowly (109.80 KB, image/png)
2008-10-17 18:42 PDT, Robert Xiao 		no flags
Details
Screenshot of bug after scrolling quickly (137.28 KB, image/png)
2008-10-17 18:43 PDT, Robert Xiao 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Robert Xiao
Comment 1 2008-10-17 18:42:57 PDT
Created attachment 24473 [details] Screenshot of bug after scrolling slowly Scrolling slowly up and down (by moving the mouse up and down after invoking scroll mode with the middle mouse button) results in this mess near the cursor.
Robert Xiao
Comment 2 2008-10-17 18:43:21 PDT
Created attachment 24474 [details] Screenshot of bug after scrolling quickly Scrolling rapidly up and down (by moving the mouse up and down after invoking scroll mode with the middle mouse button) results in large parts of the page becoming incoherent.
Dave Hyatt
Comment 3 2008-10-17 19:23:01 PDT
Probably broken by my ScrollView refactoring.
Robert Xiao
Comment 4 2008-12-14 18:33:55 PST
Still broken in the latest WebKit nightly (r39293). Is no
Robert Xiao
Comment 5 2008-12-14 18:34:28 PST
I have no idea where "Is no" came from, but it was unintentional.
Ahmad Saleem
Comment 6 2023-06-29 17:50:28 PDT
We don't have reduction and it was regression in 2008 and now a days, wikipedia works pretty much fine and does not have text wrapping issues, which are highlighted. I think we can safely close this as 'RESOLVED CONFIGURATION CHANGED'. Doing so, please reopen, if it needs to be tracked. CCing Alan and Simon for any insight.
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